{$I vp.inc}

unit VpDayViewPainter;

interface

uses
  SysUtils, LCLType, LCLIntf, LCLVersion,
  Types, Classes, Graphics, ImgList,
  VpConst, VPBase, VpData, VpBasePainter, VpDayView;

type
  { Defines matrix of event records for managing how events overlap with each other. }
  TVpDvEventRec = packed record
    Event: Pointer;
    Level: Integer;
    OLLevels: Integer; { Number of levels which overlap with the event represented by this record. }
    WidthDivisor: Integer; { Maximum OLEvents of all of this event's overlapping neighbors. }
    RealStartTime: TDateTime;
    RealEndTime: TDateTime;
  end;

  TVpDvEventArray = array of TVpDvEventRec;

  TVpDayViewPainter = class(TVpBasePainter)
  private
    FDayView: TVpDayView;
    FScaledGutterWidth: Integer;
    FScaledIconMargin: Integer;
    FScaledTickDist: Integer;
    // local parameters of the old render procedure
    ColHeadRect: TRect;
    CellsRect: TRect;
    RowHeadRect: TRect;
    ADEventsRect: TRect;
    Drawn: Boolean;
    ScrollBarOffset: Integer;
    EventCount: Integer;
    DayWidth: Integer;
    RealNumDays: Integer;
    RealRowHeight: Integer;
    RealColHeadHeight: Integer;
    RealRowHeadWidth: Integer;
    RealVisibleLines: Integer;
    BevelShadow: TColor;
    BevelHighlight: TColor;
    BevelDarkShadow: TColor;
    WindowColor: TColor;
    HighlightText: TColor;
    RealHeadAttrColor: TColor;
    RealRowHeadAttrColor: TColor;
    RealLineColor: TColor;
    RealColor: TColor;
    BevelFace: TColor;
    HighlightBkg: TColor;
    RealADEventBkgColor: TColor;
    ADEventAttrBkgColor: TColor;
    ADEventBorderColor: TColor;
    FRenderHoliday: String;
    // variables from local procedures for better access
    dvBmpRecurring: TBitmap;
    dvBmpCategory: TBitmap;
    dvBmpAlarm: TBitmap;
    dvBmpCustom: TBitmap;
    RecurringW: Integer;
    RecurringH: Integer;
    CategoryW: Integer;
    CategoryH: Integer;
    AlarmW: Integer;
    AlarmH: Integer;
    CustomW: Integer;
    CustomH: Integer;
    EventArray: TVpDvEventArray;
    VisibleRect: TRect;
    LineDuration, PixelDuration: Double;
    IconRect: TRect;
    OldPen: TPen;
    OldBrush: TBrush;
    OldFont: TFont;

  protected
    procedure CalcRowHeadRect(out ARect: TRect);
    function CalcRowHeadWidth: Integer;
    function CountOverlappingEvents(Event: TVpEvent; const EArray: TVpDvEventArray): Integer;
    procedure CreateBitmaps;
    function DetermineIconRect(AEventRect: TRect): TRect;
    function GetImageList: TCustomImageList;
    function GetMaxOLEvents(Event: TVpEvent; const EArray: TVpDvEventArray): Integer;
    procedure DrawAllDayEvents;
    procedure DrawBorders;
    procedure DrawCells(R: TRect; ColDate: TDateTime; Col: Integer);
    procedure DrawColHeader(R: TRect; ARenderDate: TDateTime; Col: Integer);
    procedure DrawEditFrame(R: TRect; AGutter, ALevel: Integer; AColor: TColor);
    procedure DrawEvent(AEvent: TVpEvent; var AEventRec: TVpDvEventRec;
      ARenderDate: TDateTime; Col: Integer);
    procedure DrawEvents(ARenderDate: TDateTime; Col: Integer);
    procedure DrawEventText(const AText: String; const AEventRect, AIconRect: TRect;
      ALevel: Integer);
    procedure DrawIcons(AIconRect: TRect);
    procedure DrawNavBtns;
    procedure DrawNavBtnBackground;
    procedure DrawRegularEvents;
    procedure DrawRowHeader(R: TRect);
    procedure DrawRowHeaderBackground(R: TRect);
    procedure DrawRowHeaderLabels(R: TRect);
    procedure DrawRowHeaderTicks(R: TRect);
    procedure FixFontHeights;
    procedure FreeBitmaps;
    procedure GetIcons(Event: TVpEvent);
    function InitAllDayEventsRect: TRect;
    procedure InitColors;
    procedure InitializeEventRectangles;
    procedure PopulateEventArray(ARenderDate: TDateTime);
    procedure PrepareEventRect(AWidthDivisor, ALevel: Integer;
      var AEventRect: TRect);
    procedure PrepareEventTimes(AEvent: TVpEvent; ARenderDate: TDateTime;
      out AStartTime, AEndTime: TDateTime);
    procedure ScaleIcons(EventRect: TRect);
    procedure SetMeasurements; override;
    procedure VerifyMaxWidthDevisors;

  public
    constructor Create(ADayView: TVpDayview; ARenderCanvas: TCanvas);
    procedure RenderToCanvas(ARenderIn: TRect; AAngle: TVpRotationAngle;
      AScale: Extended; ARenderDate: TDateTime; AStartLine, AStopLine: Integer;
      AUseGran: TVpGranularity; ADisplayOnly: Boolean); override;

  end;

implementation

uses
  StrUtils, Math, LazUtf8,
  VpCanvasUtils, VpMisc;

const
  ICON_MARGIN = 4;
  MINUTES_BORDER = 7;
  MINUTES_HOUR_DISTANCE = 4;
  TICK_DIST = 6;

type
  TVpDayViewOpener = class(TVpDayView);

constructor TVpDayViewPainter.Create(ADayView: TVpDayView; ARenderCanvas: TCanvas);
begin
  inherited Create(ARenderCanvas);
  FDayView := ADayView;
end;

{ returns the number of events which overlap the specified event }
function TVpDayViewPainter.CountOverlappingEvents(Event: TVpEvent;
  const EArray: TVpDvEventArray): Integer;
var
  K, SelfLevel: Integer;
  Tmp: TVpEvent;
  Levels: array of Integer;
begin
  { initialize the levels array }
  SetLength(Levels, MaxEventDepth);
  for K := 0 to pred(MaxEventDepth) do
    Levels[K] := 0;
  result := 0;
  { First, simply count the number of overlapping events. }
  K := 0;
  SelfLevel := -1;
  Tmp := TVpEvent(EArray[K].Event);
  while Tmp <> nil do begin
    if Tmp = Event then begin
      SelfLevel := K;
      Inc(K);
      Tmp := TVpEvent(EArray[K].Event);
      Continue;
    end;

    { if the Tmp event's StartTime or EndTime falls within the range of }
    { Event... }
    if TimeInRange(frac(Tmp.StartTime), frac(Event.StartTime), frac(Event.EndTime), false) or
       TimeInRange(frac(Tmp.EndTime), frac(Event.StartTime), frac(Event.EndTime), false) or
      { or the Tmp event's StartTime is before or equal to the Event's  }
      { start time AND its end time is after or equal to the Event's    }
      { end time, then the events overlap and we will need to increment }
      { the value of K.          }
       ((frac(Tmp.StartTime) <= frac(Event.StartTime)) and (frac(Tmp.EndTime) >= frac(Event.EndTime)))
    then begin
      { Count this event at this level }
      Inc(Levels[EArray[K].Level]);
      Inc(result);
    end;

    Inc(K);
    Tmp := TVpEvent(EArray[K].Event);
  end;
  { Then adjust count for overlapping events which share a level. }
  for K := 0 to pred(MaxEventDepth) do begin
    if K = SelfLevel then Continue;
    if Levels[K] = 0 then Continue;
    result := result - (Levels[K] - 1);
  end;
end;

procedure TVpDayViewPainter.CreateBitmaps;
begin
  dvBmpRecurring := TBitmap.Create;
  dvBmpCategory := TBitmap.Create;
  dvBmpAlarm := TBitmap.Create;
  dvBmpCustom := TBitmap.Create;
end;

function TVpDayViewPainter.DetermineIconRect(AEventRect: TRect): TRect;
var
  MaxHeight: Integer;
  w: Integer;
begin
  w := 0;
  if AlarmW <> 0 then inc(w, AlarmW + FScaledIconMargin);
  if RecurringW <> 0 then inc(w, RecurringW + FScaledIconMargin);
  if CategoryW <> 0 then inc(w, CategoryW + FScaledIconMargin);
  if CustomW <> 0 then inc(w, CustomW + FScaledIconMargin);
  if w <> 0 then inc(w, FScaledIconMargin);

  Result := AEventRect;
  Result.Right := Result.Left + w;

  MaxHeight := AlarmH + FScaledIconMargin;
  if RecurringH + FScaledIconMargin > MaxHeight then
    MaxHeight := dvBmpRecurring.Height;
  if CategoryH + FScaledIconMargin > MaxHeight then
    MaxHeight := dvBmpCategory.Height;
  if CustomH + FScaledIconMargin > MaxHeight then
    MaxHeight := dvBmpCustom.Height;
  if MaxHeight > AEventRect.Bottom - AEventRect.Top then
    MaxHeight := AEventRect.Bottom - AEventRect.Top;

  Result.Bottom := AEventRect.Top + MaxHeight;
  if Result.Right > AEventRect.Right then
    Result.Right := AEventRect.Right;
end;

{ Returns the imagelist attached to the datastore of the dayview. }
function TVpDayViewPainter.GetImageList: TCustomImageList;
begin
  if (FDayView <> nil) and (FDayView.Datastore <> nil) then
    Result := FDayView.Datastore.Images
  else
    Result := nil;
end;

{ returns the maximum OLEvents value from all overlapping neighbors }
function TVpDayViewPainter.GetMaxOLEvents(Event: TVpEvent; const EArray: TVpDvEventArray): Integer;
var
  K: Integer;
  Tmp: TVpEvent;
begin
  result := 1;
  K := 0;
  Tmp := TVpEvent(EArray[K].Event);
  while Tmp <> nil do begin
    { if the Tmp event's StartTime or EndTime falls within the range of Event. }
    if TimeInRange(frac(Tmp.StartTime), frac(Event.StartTime), frac(Event.EndTime), false) or
       TimeInRange(frac(Tmp.EndTime), frac(Event.StartTime), frac(Event.EndTime), false) or
      { or the Tmp event's StartTime is before or equal to the Event's  }
      { start time AND its end time is after or equal to the Event's    }
      { end time, then the events overlap and we will need to check the }
      { value of OLLevels. If it is bigger than result, then modify     }
      { Result accordingly. }
      ((frac(Tmp.StartTime) <= frac(Event.StartTime)) and (frac(Tmp.EndTime) >= frac(Event.EndTime)))
    then begin
      if EArray[K].OLLevels > result then
        Result := EArray[K].OLLevels;
    end;

    Inc(K);
    Tmp := TVpEvent(EArray[K].Event);
  end;
end;


{ Draws the all-day events at the top of the DayView in a special manner }
procedure TVpDayViewPainter.DrawAllDayEvents;
var
  ADEventsList: TList;
  TempList: TList;
  I, J, K: Integer;
  Event: TVpEvent;
  ADEvRect: TRect;
  StartsBeforeRange : Boolean;
  NumADEvents: Integer;
  Skip: Boolean;
  ADTextHeight: Integer;
  EventStr: string;
  I2: Integer;
  DI: Integer;
  AllDayWidth: Integer;
  OldTop: LongInt;
  txtDist: Integer;
begin
  // Initialize the rectangle to be used for all-day events
  ADEventsRect := InitAllDayEventsRect;

  if (FDayView.DataStore = nil) or (FDayView.DataStore.Resource = nil) then
    Exit;

  // Collect all of the events for this range and determine the maximum
  // number of all day events for the range of days covered by the control.
  NumADEvents := 0;

  AllDayWidth := RealWidth - RealRowHeadWidth - TextMargin - ScrollBarOffset;
  DayWidth := AllDayWidth div FDayView.NumDays;

  ADEventsList := TList.Create;
  try
    TempList := TList.Create;
    try
      for I := 0 to pred(RealNumDays) do begin
        // Skip weekends
        if (not FDayView.IncludeWeekends) and IsWeekend(RenderDate + i) then
          Continue;

        // Get the all day events for the day specified by RenderDate + I
        FDayView.DataStore.Resource.Schedule.AllDayEventsByDate(RenderDate + I, TempList);

        // Iterate through these events and place them in ADEventsList
        Skip := false;
        for J := 0 to pred(TempList.Count) do begin
          if AdEventsList.Count > 0 then begin
            for K := 0 to pred(AdEventsList.Count) do begin
              if TVpEvent(AdEventsList[K]) = TVpEvent(TempList[J]) then begin
                Skip := true;
                Break;
              end;
            end;
            if not Skip then
              AdEventsList.Add(TempList[J]);
          end else
            AdEventsList.Add(TempList[J]);
        end;

        if TempList.Count > NumADEvents then
          NumADEvents := TempList.Count;
      end;
    finally
      TempList.Free;
    end;

    if NumADEvents > 0 then begin
      // Measure the AllDayEvent text height
      RenderCanvas.Font.Assign(FDayView.AllDayEventAttributes.Font);
      {$IF VP_LCL_SCALING = 0}
      RenderCanvas.Font.Size := ScaleY(RenderCanvas.Font.Size, DesignTimeDPI);
      {$ENDIF}
      ADTextHeight := RenderCanvas.TextHeight(VpProductName) + TextMargin;

      // Distance between text and border
      txtDist := TextMargin div 2;

      // Store the top of the event's rect
      OldTop := ADEventsRect.Top;

      // Build the AllDayEventsRect based on the count of all-day events
      ADEventsRect.Bottom := AdEventsRect.Top + 2*txtDist + NumADEvents * (ADTextHeight + txtDist);

      // Clear the AllDayEvents area using its background color
      RenderCanvas.Brush.Color := RealADEventBkgColor;
      TpsFillRect(RenderCanvas, Angle, RenderIn, ADEventsRect);

      for I := 0 to pred(RealNumDays) do begin
        { Set attributes }
        StartsBeforeRange := false;
        DI := 0;
        // Cycle through the all day events and draw them appropriately
        for I2 := 0 to pred(ADEventsList.Count) do begin
          Event := ADEventsList[I2];
          if DateInRange(RenderDate + I, Event.StartTime, Event.EndTime, true) then
          begin
            // See if the event began before the start of the range
            if (Event.StartTime < trunc(RenderDate)) then
              StartsBeforeRange := true;

            // Set the event's rect
            AdEvRect.Top := OldTop + txtDist + DI * (ADTextHeight + txtDist);
            AdEvRect.Bottom := ADEvRect.Top + ADTextHeight + txtDist*2;
            AdEvRect.Left := AdEventsRect.Left + DayWidth * I + txtDist;
            AdEvRect.Right := AdEventsRect.Left + DayWidth * (I + 1) - txtDist;

            RenderCanvas.Brush.Color := ADEventAttrBkgColor;
            RenderCanvas.Pen.Color := ADEventBorderColor;
            TPSRectangle(RenderCanvas, Angle, RenderIn,
              ADEvRect.Left + txtDist,
              ADEvRect.Top + txtDist,
              ADEvRect.Right - txtDist,
              ADEvRect.Top + ADTextHeight // + txtDist*2
            );

            EventStr := IfThen(StartsBeforeRange, '>> ', '') + Event.Description;
            EventStr := GetDisplayString(RenderCanvas, EventStr, 0, WidthOf(ADEvRect) - 2*TextMargin);

            TPSTextOut(RenderCanvas,Angle, RenderIn,
              AdEvRect.Left + TextMargin,
              AdEvRect.Top + txtDist, // AdEvRect.Bottom - ADTextHeight) div 2, //TextMargin,
              EventStr
            );

            TVpDayViewOpener(FDayView).dvEventArray[EventCount].Rec := Rect(
              ADEvRect.Left,
              ADEvRect.Top - 2,
              ADEvRect.Right - TextMargin,
              ADEvRect.Bottom
            );
            TVpDayViewOpener(FDayView).dvEventArray[EventCount].Event := Event;

            Inc(EventCount);
            inc(DI);
          end;
        end; { for I2 := 0 to pred(ADEventsList.Count) do ... }
      end;
    end;   { if MaxADEvents > 0 }

  finally
    ADEventsList.Free;
  end;
end;

procedure TVpDayViewPainter.DrawBorders;
var
  tmpRect: TRect;
begin
  tmpRect := Rect(RealLeft, RealTop, RealRight-1, RealBottom-1);
  tmpRect := TPSRotateRectangle(Angle, RenderIn, tmpRect);

  if FDayView.DrawingStyle = dsFlat then begin
    { Draw a simple border }
    DrawBevelRect(RenderCanvas, tmpRect, BevelShadow, BevelShadow);
  end else
  if FDayView.DrawingStyle = ds3d then begin
    { Draw a 3d bevel }
    DrawBevelRect(RenderCanvas, tmpRect, BevelShadow, BevelHighlight);
    InflateRect(tmpRect, -1, -1);
    DrawBevelRect(RenderCanvas, tmpRect, BevelDarkShadow, BevelFace);
  end;
end;

procedure TVpDayViewPainter.DrawCells(R: TRect; ColDate: TDateTime; Col: Integer);
var
  I: Integer;
  LineRect: TRect;
  SavedFont: TFont;
  GutterRect: TRect;
  tmpRect: TRect;
  LineStartTime: Double;
  lineIndex: Integer;
begin
  if StartLine < 0 then
    StartLine := FDayView.TopLine;

  dec(R.Top);
  inc(R.Bottom);

  { Set GutterRect size }
  GutterRect.Left := R.Left;
  GutterRect.Top := R.Top;
  GutterRect.Bottom := R.Bottom;
  GutterRect.Right := GutterRect.Left + FScaledGutterWidth;
  R.Left := R.Left + FScaledGutterWidth + 1;

  { paint gutter area }
  RenderCanvas.Brush.Color := RealColor;
  tmpRect := GutterRect;
  if FDayView.DrawingStyle = dsNoBorder then
    inc(tmpRect.Bottom);
  TPSFillRect(RenderCanvas, Angle, RenderIn, tmpRect);

  { draw the line down the right side of the gutter }
  RenderCanvas.Pen.Color := BevelShadow;
  RenderCanvas.Pen.Style := psSolid;
  TPSMoveTo(RenderCanvas, Angle, RenderIn, GutterRect.Right, GutterRect.Top);
  TPSLineTo(RenderCanvas, Angle, RenderIn, GutterRect.Right, GutterRect.Bottom);

  for I := 0 to FDayView.LineCount do begin     // don't subtract 1 because of partially filled last line
    with TVpDayViewOpener(FDayView) do begin
      dvLineMatrix[Col, I].Rec.Left := -1;
      dvLineMatrix[Col, I].Rec.Top := -1;
      dvLineMatrix[Col, I].Rec.Right := -1;
      dvLineMatrix[Col, I].Rec.Bottom := -1;
    end;
  end;

  SavedFont := TFont.Create;
  SavedFont.Assign(RenderCanvas.Font);
  try
    RenderCanvas.Font.Assign(FDayView.Font);
    {$IF VP_LCL_SCALING = 0}
    RenderCanvas.Font.Size := ScaleY(RenderCanvas.Font.Size, DesignTimeDPI);
    {$ENDIF}
    RenderCanvas.Brush.Color := RealColor;
    TPSFillRect(RenderCanvas, Angle, RenderIn, R);

    LineRect := Rect(R.left, R.top, R.Right, R.Top + RealRowHeight);
    RenderCanvas.Pen.Style := psSolid;
    RenderCanvas.Pen.Color := FDayView.LineColor;

    { Paint the client area }
    I := 0;
    while true do begin
      lineIndex := StartLine + I;

      if (I > pred(FDayView.LineCount)) then
        Break;

      if lineIndex >= FDayView.LineCount then
        Break;

      if (StopLine <> -1) and (lineIndex >= StopLine) then
        Break;

      RenderCanvas.Brush.Color := RealColor;
      RenderCanvas.Font.Assign(SavedFont); // no further scaling needed here
      LineRect.Top := Round(R.Top + i * RealRowHeight);
      LineRect.Bottom := Round(LineRect.Top + RealRowHeight);

      TVpDayViewOpener(FDayView).dvLineMatrix[Col, lineIndex].Rec := LineRect;

      { color-code cells }

      // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
      // !!!! This causes problems at design time - implement a better   !!!!
      // !!!! Fix - check the value after the component is streamed in   !!!!
      // !!!! May be a good use for ... loaded or in my message          !!!!
      // !!!! Handler (the message handler would be better               !!!!
      // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//        if ActiveRow = -1 then
//         ActiveRow := TopLine;

      if i = 0 then
        dec(LineRect.Top);

      if (not DisplayOnly) and  // this means: during screen output
         FDayView.Focused and (FDayView.ActiveCol = Col) and (FDayView.ActiveRow = lineIndex)
      then begin
        { Paint background hilight color }
        RenderCanvas.Brush.Color := HighlightBkg;
        RenderCanvas.Font.Color := HighlightText;
      end else
      if (FRenderHoliday <> '') then
        RenderCanvas.Brush.Color := FDayview.TimeSlotColors.Holiday
      else
      if IsWeekend(ColDate) then
        { weekend color }
        RenderCanvas.Brush.Color := FDayView.TimeSlotColors.Weekend
      else
      { ColDate is a weekday, so check to see if the active range is set.
        If it isn't then paint all rows the color corresponding to Weekday.
        If it is, then paint inactive rows the color corresponding to inactive
        and the active  rows the color corresponding to Active Rows. }
      if FDayView.TimeSlotColors.ActiveRange.RangeBegin = FDayView.TimeSlotColors.ActiveRange.RangeEnd then
        { There is no active range --> Paint all time slots in the weekday color }
        RenderCanvas.Brush.Color := FDayView.TimeSlotColors.Weekday
      else begin
        { There is an active range defined, so we need to see if the current
          line falls in the active range or not, and paint it accordingly }
        LineStartTime := TVpDayViewOpener(FDayView).dvLineMatrix[Col, lineIndex].Time;
        if TimeInRange(
            LineStartTime,
            FDayView.TimeSlotColors.ActiveRange.StartTime,
            FDayView.TimeSlotColors.ActiveRange.EndTime - OneMinute,
            true
          )
        then
          RenderCanvas.Brush.Color := FDayView.TimeSlotColors.Active
        else
          RenderCanvas.Brush.Color := FDayView.TimeSlotColors.Inactive;
      end;

      TPSFillRect (RenderCanvas, Angle, RenderIn, LineRect);

      { Draw the lines }
      RenderCanvas.Pen.Color := FDayView.LineColor;
      TPSMoveTo(RenderCanvas, Angle, RenderIn, LineRect.Left, LineRect.Bottom - 1);
      if (lineIndex + 1) mod FDayView.RowLinesStep = 0 then
        TPSLineTo(RenderCanvas, Angle, RenderIn, LineRect.Right - 1, LineRect.Bottom - 1);
      inc(I);
    end;  // while true ...

    { Draw a line down the right side of the column to close the }
    { cells right sides }
    RenderCanvas.Pen.Color := BevelShadow;
    RenderCanvas.Pen.Style := psSolid;
    TPSMoveTo(RenderCanvas, Angle, RenderIn, R.Right - 1, R.Bottom);
    TPSLineTo(RenderCanvas, Angle, RenderIn, R.Right - 1, R.Top - 1);

  finally
    RenderCanvas.Font.Assign(SavedFont);
    SavedFont.Free;
  end;
end;

procedure TVpDayViewPainter.DrawColHeader(R: TRect; ARenderDate: TDateTime;
  Col: Integer);
var
  SaveFont: TFont;
  DateStr, ResStr: string;
  DateStrLen, ResStrLen: integer;
  DateStrHt: Integer;
  TextRect: TRect;
  X, Y: Integer;
  tmpRect: TRect;
begin
  SaveFont := TFont.Create;
  try
    SaveFont.Assign(RenderCanvas.Font);

    { Draw Column Header }
    RenderCanvas.Font.Assign(FDayView.HeadAttributes.Font);
    {$IF VP_LCL_SCALING = 0}
    RenderCanvas.Font.Size := ScaleY(RenderCanvas.Font.Size, DesignTimeDPI);
    {$ENDIF}
    RenderCanvas.Brush.Color := RealHeadAttrColor;
    RenderCanvas.Pen.Style := psClear;
    tmpRect := R;
    InflateRect(tmpRect, 1, 1);
    inc(tmpRect.Left);
    if FDayView.DrawingStyle = dsNoBorder then
      InflateRect(tmpRect, 1, 1);
    TPSRectangle(RenderCanvas, Angle, RenderIn, tmpRect);
    RenderCanvas.Pen.Style := psSolid;

    { Size text rect }
    TextRect.TopLeft := R.TopLeft;
    TextRect.BottomRight := R.BottomRight;
    TextRect.Right := TextRect.Right - 3;
    TextRect.Left := TextRect.Left + 2;

    { Fix date string for best usage of the available width }
    DateStr := GetDateDisplayString(RenderCanvas, ARenderDate,
      FDayView.DateLabelFormat, FRenderHoliday, WidthOf(TextRect));
    DateStrLen := RenderCanvas.TextWidth(DateStr);
    DateStrHt := RenderCanvas.TextHeight(DateStr);

    if (FDayView.DataStore <> nil) and (FDayView.DataStore.Resource <> nil)
       and FDayView.ShowResourceName
    then begin
      { fix Res String }
      ResStr := FDayView.DataStore.Resource.Description;
      ResStrLen := RenderCanvas.TextWidth(ResStr);
      if ResStrLen > TextRect.Right - TextRect.Left then begin
        ResStr := GetDisplayString(RenderCanvas, ResStr, 0, TextRect.Right - TextRect.Left);
        ResStrLen := RenderCanvas.TextWidth(ResStr);
      end;
      { center and write the resource name in the first column }
      if (Col = 0) then begin
        X := TextRect.Left + (TextRect.Right - TextRect.Left) div 2 - ResStrLen div 2;
        Y := TextRect.Top + TextMargin;
        TPSTextOut(RenderCanvas, Angle, RenderIn, X, Y, FDayView.DataStore.Resource.Description);
      end;
      { center the date string }
      X := TextRect.Left + (TextRect.Right - TextRect.Left) div 2 - DateStrLen div 2;
      Y := TextRect.Top + (TextMargin * 2) + DateStrHt;
    end else begin
      { center the date string }
      Y := TextRect.Top + TextMargin;
      X := TextRect.Left + (TextRect.Right - TextRect.Left) div 2 - DateStrLen div 2;
    end;
    { Write the date string }
    TPSTextOut(RenderCanvas, Angle, RenderIn, X, Y, DateStr);

    {Draw Column Head Borders }
    if FDayView.DrawingStyle = dsFlat then begin
       // bottom
      RenderCanvas.Pen.Color := BevelShadow;
      TPSMoveTo(RenderCanvas, Angle, RenderIn, R.Right, R.Bottom - 1);
      TPSLineTo(RenderCanvas, Angle, RenderIn, R.Left - 2, R.Bottom - 1);
      // right side
      TPSMoveTo(RenderCanvas, Angle, RenderIn, R.Right, R.Bottom - 1);
      RenderCanvas.Pen.Color := RealHeadAttrColor;
      TPSLineTo(RenderCanvas, Angle, RenderIn, R.Right, R.Bottom - 4);
      RenderCanvas.Pen.Color := BevelShadow;
      TPSLineTo(RenderCanvas, Angle, RenderIn, R.Right, R.Top + 2);
      RenderCanvas.Pen.Color := RealHeadAttrColor;
      TPSLineTo(RenderCanvas, Angle, RenderIn, R.Right, R.Top);
    end
    else
    if FDayView.DrawingStyle = ds3d then begin
      dec(R.Bottom);
      if Col = FDayView.NumDays - 1 then
        dec(R.Right, 4);
      R := TPSRotateRectangle(Angle, RenderIn, R);
      DrawBevelRect(RenderCanvas, R, BevelHighlight, BevelDarkShadow);
    end;
    RenderCanvas.Font.Assign(SaveFont);
  finally
    SaveFont.Free;
  end;
end;

{ paint extra borders around the editor }
procedure TVpDayViewPainter.DrawEditFrame(R: TRect; AGutter, ALevel: Integer;
  AColor: TColor);
begin
  RenderCanvas.Pen.Color := clWindowFrame;
  RenderCanvas.Brush.Color := AColor;
  if ALevel = 0 then
    with R do begin
      TPSFillRect(RenderCanvas, Angle, RenderIn, Rect(Left, Top-AGutter, Right, Top));
      TPSFillRect(RenderCanvas, Angle, RenderIn, Rect(Left-AGutter, Top, Left, Bottom));
      TPSFillRect(RenderCanvas, Angle, RenderIn, Rect(Left, Bottom, Right, Bottom + AGutter));
      TPSFillRect(RenderCanvas, Angle, RenderIn, Rect(Right, Top, Right+AGutter, Bottom));
    end
  else
    with R do begin
      TPSFillRect(RenderCanvas, Angle, RenderIn, Rect(Left+AGutter, Top-AGutter, Right, Top));
      TPSFillRect(RenderCanvas, Angle, RenderIn, Rect(Left, Top, Left, Bottom));
      TPSFillRect(RenderCanvas, Angle, RenderIn, Rect(Left+AGutter, Bottom, Right, Bottom + AGutter));
      TPSFillRect(RenderCanvas, Angle, RenderIn, Rect(Right, Top, Right+AGutter, Bottom));
    end;
end;

procedure TVpDayViewPainter.DrawEvent(AEvent: TVpEvent; var AEventRec: TVpDvEventRec;
  ARenderDate: TDateTime; Col: Integer);
var
  EventCategory: TVpCategoryInfo;
  EventIsEditing: Boolean;
  EventIsOverlayed: Boolean;
  EventSTime, EventETime: Double;
  EventDuration: Double;
  EventSLine, EventELine, EventLineCount: Integer;
  EventRect, GutterRect: TRect;
  StartPixelOffset, EndPixelOffset: Integer;
  StartOffset, EndOffset: Double;
  EventString: String;
  tmpRect: TRect;
  maxW: Integer;
  grp: TVpResourceGroup;
begin
  { Initialize, collect useful information needed later }
  if Assigned(FDayView.Datastore) then
  begin
    EventCategory := FDayView.Datastore.CategoryColorMap.GetCategory(AEvent.Category);
    grp := FDayView.Datastore.Resource.Group;
  end else begin
    EventCategory := nil;
    grp := nil;
  end;
  EventIsOverlayed := AEvent.IsOverlayed;

  with TVpDayViewOpener(FDayView) do
    if (dvInplaceEditor <> nil) and dvInplaceEditor.Visible then
      EventIsEditing := (ActiveEvent = AEvent)
    else
      EventIsEditing := false;

  { remove the date portion from the start and end times }
  PrepareEventTimes(AEvent, ARenderDate, EventSTime, EventETime);
  AEventRec.RealStartTime := EventSTime;
  AEventRec.RealEndTime := EventETime;

  { Find the lines on which this event starts and ends }
  EventSLine := GetStartLine(EventSTime, UseGran);
  EventELine := GetEndLine(EventETime, UseGran);

  { If the event doesn't occupy area that is currently visible, then skip it. }
  if (EventELine < StartLine) or (EventSLine > StartLine + RealVisibleLines + 1) then
    Exit;

  { Calculate the number of lines this event will cover }
  EventLineCount := EventELine - EventSLine + 1;
  EventDuration := EventETime - EventSTime;

  { Build the rectangle in which the event will be painted. }
  EventRect := TVpDayViewOpener(FDayView).dvLineMatrix[Col, EventSLine].Rec;
  EventRect.Bottom := TVpDayViewOpener(FDayView).dvLineMatrix[Col, EventELine].Rec.Bottom;
  PrepareEventRect(AEventRec.WidthDivisor, AEventRec.Level, EventRect);

  { Draw the event rectangle }
  RenderCanvas.Brush.Color := WindowColor;
  if Assigned(FDayView.DataStore) then begin
    if EventIsEditing then
      RenderCanvas.Brush.Color := WindowColor
    else
    if Assigned(EventCategory) then
      RenderCanvas.Brush.Color := EventCategory.BackgroundColor
  end;
  if EventIsOverlayed then begin
    if (grp <> nil) and (not (odEventCategory in grp.ShowDetails)) then
      RenderCanvas.Brush.Color := FDayView.Datastore.HiddenCategories.BackgroundColor
    else
      RenderCanvas.Brush.Style := OverlayPatternToBrushStyle(AEvent.GetResource.Group.Pattern);
  end;
  TPSFillRect(RenderCanvas, Angle, RenderIn, EventRect);
  RenderCanvas.Brush.Style := bsSolid;

  { Paint the little area to the left of the text the color corresponding to
    the event's category. These colors are used even when printing }
  RenderCanvas.Brush.Color := clNavy;
  if Assigned(FDayView.Datastore) then
  begin
    RenderCanvas.Brush.Color := EventCategory.Color;
    if EventIsOverlayed and (grp <> nil) and (not (odEventCategory in grp.ShowDetails)) then
      RenderCanvas.Brush.Color := FDayView.Datastore.HiddenCategories.Color;
  end;

  { find the pixel offset to use for determining where to start and }
  { stop drawing colored area according to the start time and end time of the event. }
  StartPixelOffset := 0;
  EndPixelOffset := 0;
  //if (PixelDuration > 0) and (EventDuration < GetLineDuration(FDayView.Granularity) * EventLineCount)
  if (PixelDuration > 0) and (EventDuration < GetLineDuration(UseGran) * EventLineCount)
  then begin
    if (EventSLine >= StartLine) and (EventSTime > TVpDayViewOpener(FDayView).dvLineMatrix[0, EventSLine].Time)
    then begin
      { Get the start offset in TDateTime format }
      StartOffset := EventSTime - TVpDayViewOpener(FDayView).dvLineMatrix[0, EventSLine].Time;
      { determine how many pixels to scooch down before painting the event's color code. }
      StartPixelOffset := trunc(StartOffset / PixelDuration);
    end;

    if (EventELine <= StartLine + RealVisibleLines) and
       (EventETime < TVpDayViewOpener(FDayView).dvLineMatrix[0, EventELine + 1].Time)
    then begin
      { Get the end offset in TDateTime format }
      EndOffset := TVpDayViewOpener(FDayView).dvLineMatrix[0, EventELine + 1].Time - EventETime;
      { determine how many pixels to scooch down before painting the event's color code. }
      EndPixelOffset := trunc(EndOffset / PixelDuration);;
    end;
  end;

  { Paint the gutter inside the EventRect of all events }
  if (AEventRec.Level = 0) then
    GutterRect.Left := EventRect.Left - Trunc(FDayView.GutterWidth * Scale)   // wp: use FGutterWidth? It uses round, though...
  else
    GutterRect.Left := EventRect.Left;
  GutterRect.Right := GutterRect.Left + FScaledGutterWidth;
  GutterRect.Top := EventRect.Top + StartPixelOffset;
  GutterRect.Bottom := EventRect.Bottom - EndPixelOffset + 1;
  TPSFillRect(RenderCanvas, Angle, RenderIn, GutterRect);

  RenderCanvas.Brush.Color := WindowColor;

  IconRect.Left := EventRect.Left;
  IconRect.Top := EventRect.Top;
  IconRect.Right := EventRect.Left;
  IconRect.Bottom := EventRect.Top;
  if FDayView.IconAttributes.ShowInPrint then begin
    GetIcons(AEvent);
    if AEventRec.Level = 0 then begin
      ScaleIcons(EventRect);
      IconRect := DetermineIconRect(EventRect);
    end else begin
      tmpRect := EventRect;
      inc(tmpRect.Left, FDayView.GutterWidth);
      ScaleIcons(tmpRect);
      IconRect := DetermineIconRect(tmpRect);
    end;
  end;

  OldPen.Assign(RenderCanvas.Pen);      // wp: Original code had "Canvas" here which does not look correct
  OldBrush.Assign(RenderCanvas.Brush);
  OldFont.Assign(RenderCanvas.Font);

  if Assigned(FDayView.OnBeforeDrawEvent) then begin
    tmpRect := EventRect;
    if (AEventRec.Level <> 0) then
      inc(tmpRect.Left, FDayView.GutterWidth);
    FDayView.OnBeforeDrawEvent(Self, AEvent, FDayView.ActiveEvent = AEvent,
      RenderCanvas, GutterRect, tmpRect, IconRect);
  end;

  if FDayView.IconAttributes.ShowInPrint then
    DrawIcons(IconRect);

  { Build the event string }
  EventString := FDayView.BuildEventString(AEvent, false);

  { If the string is longer than the availble space then chop off the end
    and place those little '...'s at the end }
  if FDayView.WrapStyle = wsNone then begin
    maxW := EventRect.Right - IconRect.Right - FScaledGutterWidth - TextMargin;
    if RenderCanvas.TextWidth(EventString) > maxW then
      EventString := GetDisplayString(RenderCanvas, EventString, 0, maxW);
  end;

  { Draw the event string }
  DrawEventText(EventString, EventRect, IconRect, AEventRec.Level);

  { paint the borders around the event text area }
  TPSPolyline(RenderCanvas, Angle, RenderIn, [
    Point(EventRect.Left, EventRect.Top),
    Point(EventRect.Right, EventRect.Top),
    Point(EventRect.Right, EventRect.Bottom),
    Point(EventRect.Left, EventRect.Bottom),
    Point(EventRect.Left, EventRect.Top)
  ]);

  { don't paint gutter area on level 0 items }
  if AEventRec.Level > 0 then begin
    TPSMoveTo(RenderCanvas, Angle, RenderIn, EventRect.Left + FScaledGutterWidth, EventRect.Top);
    TPSLineTo(RenderCanvas, Angle, RenderIn, EventRect.Left + FScaledGutterWidth, EventRect.Bottom);
  end;

  if Assigned(FDayView.OnAfterDrawEvent) then begin
    tmpRect := EventRect;
    if (AEventRec.Level <> 0) then
      inc(tmpRect.Left, FDayView.GutterWidth);
    FDayView.OnAfterDrawEvent(Self, AEvent, FDayView.ActiveEvent = AEvent,
      RenderCanvas, GutterRect, tmpRect, IconRect);
  end;

  RenderCanvas.Brush.Assign(OldBrush);   // wp: Original code had "Canvas" here which does not look correct.
  RenderCanvas.Pen.Assign(OldPen);
  RenderCanvas.Font.Assign(OldFont);

  tmpRect := EventRect;
  inc(tmpRect.Bottom);
  TVpDayViewOpener(FDayView).dvEventArray[EventCount].Rec := tmpRect;
  TVpDayViewOpener(FDayView).dvEventArray[EventCount].IconRect := IconRect;
  TVpDayViewOpener(FDayView).dvEventArray[EventCount].Event := AEvent;

  Inc(EventCount);
end;

procedure TVpDayViewPainter.DrawEvents(ARenderDate: TDateTime; Col: Integer);
var
  I: Integer;
  Event: TVpEvent;
  SaveFont: TFont;
  SaveColor: TColor;
  OKToDrawEditFrame: Boolean;
  tmpRect: TRect;
  level: Integer;
begin
  if (FDayView.DataStore = nil) or (FDayView.DataStore.Resource = nil) or
     (not FDayView.DataStore.Connected)
  then
    Exit;

  { Save the canvas color and font }
  SaveColor := RenderCanvas.Brush.Color;
  SaveFont := TFont.Create;
  SaveFont.Assign(RenderCanvas.Font);

  {Get all of the events for this day}
  PopulateEventArray(ARenderDate);

  // Count the number of events which all share some of the same time
  for I := 0 to pred(MaxVisibleEvents) do begin
    if EventArray[I].Event = nil then
      Break;
    EventArray[I].OLLevels := 1 + { it is necessary to count this event too }
      CountOverlappingEvents(TVpEvent(EventArray[I].Event), EventArray);
  end;

  // Calculate the largest width divisor of all overlapping events, for each event.
  for I := 0 to pred(MaxVisibleEvents) do begin
    if EventArray[I].Event = nil then
      Break;
    EventArray[I].WidthDivisor := GetMaxOLEvents(TVpEvent(EventArray[I].Event), EventArray);
  end;

  // Make one last pass, to make sure that we have set up the width divisors properly
  VerifyMaxWidthDevisors;

  // Time to paint 'em. Let's see if we calculated their placements correctly
  IconRect := Rect(0, 0, 0, 0);
  CreateBitmaps;
  OldFont := TFont.Create;
  OldPen := TPen.Create;
  OldBrush := TBrush.Create;
  try
    { get a rectangle of the visible area }
    VisibleRect := TVpDayViewOpener(FDayView).dvLineMatrix[Col, StartLine].Rec;
    VisibleRect.Bottom := FDayView.ClientRect.Bottom;

    LineDuration := GetLineDuration(FDayView.Granularity);
    { Determine how much time is represented by one pixel. It is the   }
    { amount of time represented by one line, divided by the height of }
    { a line in pixels. }
    with TVpDayViewOpener(FDayView) do
      if HeightOf(dvLineMatrix[Col, StartLine].Rec) > 0 then
        PixelDuration := LineDuration / HeightOf(dvLineMatrix[Col, StartLine].Rec)
      else
        PixelDuration := 0;

    { Iterate through events and paint them }
    level := -1;
    for I := 0 to pred(MaxVisibleEvents) do begin
      { get the next event }
      Event := TVpEvent(EventArray[I].Event);

      { if we have hit the end of the events, then bail out }
      if Event = nil then
        Break;

      DrawEvent(Event, EventArray[i], ARenderDate, Col);
      if Event = FDayView.ActiveEvent then level := i;
    end;

    { paint extra borders around the editor }
    OKToDrawEditFrame := True;
    if Assigned(FDayView.ActiveEvent) then
      OKToDrawEditFrame := not FDayView.ActiveEvent.AllDayEvent;

    with TVpDayViewOpener(FDayView) do
      if (dvInPlaceEditor <> nil) and dvInplaceEditor.Visible and OKToDrawEditFrame then
      begin
        tmpRect := dvActiveEventRec;
        DrawEditFrame(tmpRect, GutterWidth, level,
          Datastore.CategoryColorMap.GetColor(ActiveEvent.Category));
      end;

  finally
    { Clean Up }
    try
      SetLength(EventArray, 0);
      FreeBitmaps;
    finally
      { restore canvas color and font }
      RenderCanvas.Brush.Color := SaveColor;
      RenderCanvas.Font.Assign(SaveFont);
      SaveFont.Free;
      OldFont.Free;
      OldPen.Free;
      OldBrush.Free;
    end;
  end;
end;

procedure TVpDayViewPainter.DrawIcons(AIconRect: TRect);
var
  DrawPos: Integer;

  procedure DrawIcon(ABitmap: TBitmap; w, h: Integer; IncDrawPos: Boolean = false);
  var
    R: TRect;
    bmp: TBitmap;
  begin
    if (ABitmap.Width <> 0) and (ABitmap.Height <> 0) then
    begin
      ABitmap.Transparent := True;
      R := Rect(0, 0, w, h);
      OffsetRect(R,
        AIconRect.Left + FScaledIconMargin + DrawPos,
        AIconRect.Top + FScaledIconMargin
      );

      bmp := TBitmap.Create;
      try
        bmp.Assign(ABitmap);
        bmp.Transparent := true;
       {$IFDEF FPC}
        RotateBitmap(Bmp, Angle);
       {$ENDIF}
        TPSStretchDraw(RenderCanvas, Angle, RenderIn, R, Bmp);
      finally
        bmp.Free;
      end;

      if IncDrawPos then
        inc(DrawPos, w + FScaledIconMargin);

    end;
  end;

begin
  DrawPos := 0;
  DrawIcon(dvBmpAlarm, AlarmW, AlarmH, true);
  DrawIcon(dvBmpRecurring, RecurringW, RecurringH, true);
  DrawIcon(dvBmpCustom, CustomW, CustomH, true);
  DrawIcon(dvBmpCategory, CategoryW, CategoryH, true);
end;

procedure TVpDayViewPainter.DrawEventText(const AText: String;
  const AEventRect, AIconRect: TRect; ALevel: Integer);
var
  WorkRegion1: HRGN = 0;
  WorkRegion2: HRGN = 0;
  TextRegion: HRGN = 0;
  CW: Integer;
begin
  if (FDayView.WrapStyle <> wsNone) then begin
    if (AEventRect.Bottom <> AIconRect.Bottom) and (AEventRect.Left <> AIconRect.Right)
    then begin
      if FDayView.WrapStyle = wsIconFlow then
      begin
        WorkRegion1 := CreateRectRgn(AIconRect.Right, AEventRect.Top, AEventRect.Right, AIconRect.Bottom);
        WorkRegion2 := CreateRectRgn(AEventRect.Left + FDayView.GutterWidth, AIconRect.Bottom, AEventRect.Right, AEventRect.Bottom);
        TextRegion := CreateRectRgn(AIconRect.Right, AEventRect.Top, AEventRect.Right, AIconRect.Bottom);
        CombineRgn(TextRegion, WorkRegion1, WorkRegion2, RGN_OR);
      end else
        TextRegion := CreateRectRgn(AIconRect.Right, AEventRect.Top, AEventRect.Right, AEventRect.Bottom);
    end else
      TextRegion := CreateRectRgn(AIconRect.Right + FDayView.GutterWidth, AEventRect.Top, AEventRect.Right, AEventRect.Bottom);

    try
      CW := RenderTextToRegion(RenderCanvas, Angle, RenderIn, TextRegion, AText);
      { write the event string to the proper spot in the EventRect }
      if CW < Length(AText) then begin
        RenderCanvas.Brush.Color := FDayView.DotDotDotColor;
        { draw dot dot dot }
        TPSFillRect(RenderCanvas, Angle, RenderIn,
          Rect(AEventRect.Right - 20, AEventRect.Bottom - 7, AEventRect.Right - 17, AEventRect.Bottom - 4)
        );
        TPSFillRect(RenderCanvas, Angle, RenderIn,
          Rect(AEventRect.Right - 13, AEventRect.Bottom - 7, AEventRect.Right - 10, AEventRect.Bottom - 4));
        TPSFillRect(RenderCanvas, Angle, RenderIn,
          Rect(AEventRect.Right - 6, AEventRect.Bottom - 7, AEventRect.Right - 3, AEventRect.Bottom - 4));
      end;
    finally
      if WorkRegion1 <> 0 then DeleteObject(WorkRegion1);
      if WorkRegion2 <> 0 then DeleteObject(WorkRegion2);
      if TextRegion <> 0 then DeleteObject(TextRegion);
    end;
  end
  else begin
  if ALevel = 0 then
    { don't draw the gutter in the EventRect for level 0 events. }
    TPSTextOut(RenderCanvas,             // wp: both cases are the same ?!
      Angle,
      RenderIn,
      AIconRect.Right + FDayView.GutterWidth + TextMargin,
      AEventRect.Top + TextMargin,
      AText
    )
  else
    TPSTextOut(RenderCanvas,
      Angle,
      RenderIn,
      AIconRect.Right + FDayView.GutterWidth + TextMargin,
      AEventRect.Top + TextMargin,
      AText
    );
  end;
end;

procedure TVpDayViewPainter.DrawNavBtns;
var
  w: Integer;
begin
  { size and place the Today button first. }
  with TVpDayViewOpener(FDayView) do begin
    dvDayUpBtn.Visible := FShowNavButtons;
    dvDayDownBtn.Visible := FShowNavButtons;
    dvTodayBtn.Visible := FShowNavButtons;
    dvWeekUpBtn.Visible := FShowNavButtons;
    dvWeekDownBtn.Visible := FShowNavButtons;

    { In order to hide the nav btns in designmode move them out of their parent }
    if (csDesigning in ComponentState) and not FShowNavButtons then begin
      dvTodayBtn.Left := -Width;
      dvWeekDownBtn.Left := -Width;
      dvWeekUpBtn.Left := -Width;
      dvDayDownBtn.Left := -Width;
      dvDayUpBtn.Left := -Width;
      exit;
    end;

    { Calculate width of buttons }
    dvTodayBtn.Height := trunc(RealColHeadHeight div 2);
    dvTodayBtn.Width := RealRowHeadWidth;
    dvWeekDownBtn.Width := RealRowHeadWidth div 4 + 2;
    dvWeekUpBtn.Width := dvWeekDownBtn.Width;
    dvDaydownBtn.Width := dvWeekdownBtn.Width - 4;
    dvDayUpBtn.Width := dvDayDownBtn.Width;

    w := dvWeekDownBtn.Width + dvWeekUpBtn.Width + dvDaydownBtn.Width + dvDayUpBtn.Width;
    if DrawingStyle = ds3d then begin
      dvTodayBtn.Left := 2 + (RealRowHeadWidth - w) div 2;
      dvTodayBtn.Top := 2;
    end else
    begin
      dvTodayBtn.Left := 1 + (RealRowHeadWidth - w) div 2;
      dvTodayBtn.Top := 1;
    end;

    { size and place the WeekDown button }
    dvWeekDownBtn.Height := dvTodayBtn.Height;
    dvWeekDownBtn.Left := dvTodayBtn.Left;
    dvWeekDownBtn.Top := dvTodayBtn.Top + dvTodayBtn.Height;

    { size and place the DayDown button }
    dvDayDownBtn.Height := dvTodayBtn.Height;
    dvDayDownBtn.Left := dvWeekDownBtn.Left + dvWeekDownBtn.Width;
    dvDayDownBtn.Top := dvWeekDownBtn.Top;

    { size and place the DayUp button }
    dvDayUpBtn.Height := dvTodayBtn.Height;
    dvDayUpBtn.Left := dvDayDownBtn.Left + dvDayDownBtn.Width;
    dvDayUpBtn.Top := dvWeekDownBtn.Top;

    { size and place the WeekUp button }
    dvWeekUpBtn.Height := dvTodayBtn.Height;
    dvWeekUpBtn.Left := dvDayUpBtn.Left + dvDayUpBtn.Width;
    dvWeekUpBtn.Top := dvWeekDownBtn.Top;
  end;
end;

procedure TVpDayViewPainter.DrawNavBtnBackground;
var
  R: TRect;
begin
  // Draw the background
  RenderCanvas.Brush.Color := RealHeadAttrColor;
  R := Rect(
    RealLeft + 1,
    RealTop,
    RealLeft + 3 + RealRowHeadWidth,
    RealTop + RealColHeadHeight  // + 1
  );
  if FDayView.DrawingStyle = dsNoBorder then begin
    InflateRect(R, 1, 1);
    TPSFillRect(RenderCanvas, Angle, RenderIn, R);
    exit;
  end;
  TPSFillRect(RenderCanvas, Angle, RenderIn, R);

  // Draw the border
  if FDayView.DrawingStyle = ds3d then begin
    R := Rect(R.Left + 1, R.Top + 2, R.Right - 2, R.Bottom - 1);
    DrawBevelRect(
      RenderCanvas,
      TPSRotateRectangle(Angle, RenderIn, R),
      BevelHighlight,
      BevelShadow
    )
  end else
  if FDayView.DrawingStyle = dsFlat then begin
    RenderCanvas.Pen.Color := BevelShadow;
    TPSMoveTo(RenderCanvas, Angle, RenderIn, R.Right - 6, R.Bottom- 1);
    TPSLineTo(RenderCanvas, Angle, RenderIn, R.Left + 3, R.Bottom - 1);
    TPSMoveTo(RenderCanvas, Angle, RenderIn, R.Right - 2, R.Top + 6);
    TPSLineTo(RenderCanvas, Angle, RenderIn, R.Right - 2, R.Bottom - 5);
    {
    RenderCanvas.Pen.Color := BevelHighlight;
    TPSLineTo(RenderCanvas, Angle, RenderIn, R.Left, R.Top);
    TPSLineTo(RenderCanvas, Angle, RenderIn, R.Right - 2, R.Top);
    }
  end;
end;

procedure TVpDayViewPainter.DrawRegularEvents;
var
  i: Integer;
  RPos: Integer;
  AllDayWidth: Integer;
  ExtraSpace: Integer;
  DrawMe: Boolean;
  RealDay: Integer;
begin
  if RealNumDays = 0 then begin
    while (DayOfWeek(RenderDate) = 1) or (DayOfWeek(RenderDate) = 7) do
      RenderDate := RenderDate + 1;
    RealNumDays := FDayView.NumDays;
  end;
  AllDayWidth := RealWidth - RealRowHeadWidth - 1 - ScrollBarOffset;

  DayWidth := AllDayWidth div FDayView.NumDays;
  ExtraSpace := AllDayWidth mod FDayView.NumDays;

  RPos := RowHeadRect.Right;

  RealDay := 0;
  for i := 0 to RealNumDays - 1 do begin
    DrawMe := True;
    if not FDayView.IncludeWeekends then begin
      if (DayOfWeek(RenderDate + i) = 1) or (DayOfWeek(RenderDate + i) = 7) then
        DrawMe := False
    end;
    if DrawMe then begin
      { Check if the currently rendered day is a holiday and store its name }
      FDayView.IsHoliday(RenderDate + i, FRenderHoliday);

      { Calculate Column Header rectangle }
      ColHeadRect := Rect(RPos, RealTop + 2, RPos + DayWidth - 1, RealTop + RealColHeadHeight);
      if (i = RealNumDays - 1) and (ExtraSpace > 0) then
        ColHeadRect.Right := ColHeadRect.Right + ExtraSpace;

      { Calculate the column rect for this day }
      RenderCanvas.Font.Assign(FDayView.Font);
      {$IF VP_LCL_SCALING = 0}
      RenderCanvas.Font.Size := ScaleY(RenderCanvas.Font.Size, DesignTimeDPI);
      {$ENDIF}
      CellsRect := Rect(RPos, ADEventsRect.Bottom + 1, RPos + DayWidth, RealBottom - 2);
      if (i = RealNumDays - 1) and (ExtraSpace > 0) then
        CellsRect.Right := CellsRect.Right + ExtraSpace;

      { set the ColRectArray }
      TVpDayViewOpener(FDayView).dvColRectArray[RealDay].Rec := CellsRect;
      TVpDayViewOpener(FDayView).dvColRectArray[RealDay].Date := RenderDate + i;

      { Draw the cells }
      if Assigned(FDayView.OwnerDrawCells) then begin
        FDayView.OwnerDrawCells(self, RenderCanvas, CellsRect, RealRowHeight, Drawn);
        if not Drawn then
          DrawCells(CellsRect, RenderDate + i, RealDay);
      end else
        DrawCells(CellsRect, RenderDate + i, RealDay);

      { Draw the regular events }
      DrawEvents(RenderDate + i, RealDay);

      { Draw the column header }
      if Assigned(FDayView.OwnerDrawColHeader) then begin
        Drawn := false;
        FDayView.OwnerDrawColHeader(self, RenderCanvas, ColHeadRect, Drawn);
        if not Drawn then
          DrawColHeader(ColHeadRect, RenderDate + i, RealDay);
      end else
        DrawColHeader(ColHeadRect, RenderDate + i, RealDay);

      Inc(RPos, DayWidth);
      Inc(RealDay);
    end;
  end;
end;

procedure TVpDayViewPainter.DrawRowHeader(R: TRect);
begin
  if StartLine < 0 then
    StartLine := FDayView.TopLine;

  // Draw background and border
  DrawRowHeaderBackground(R);

  // Draw time ticks
  DrawRowHeaderTicks(R);

  // Draw time labels
  DrawRowHeaderLabels(R);
end;

procedure TVpDayViewPainter.DrawRowHeaderBackground(R: TRect);
var
  tmpRect: TRect;
begin
  // Expand rect to include the area left of the all-day events
  dec(R.Top, HeightOf(ADEventsRect));

  // Draw row header background
  if FDayView.DrawingStyle = dsNoBorder then
    InflateRect(R, 1,1);
  RenderCanvas.Pen.Style := psClear;
  RenderCanvas.Brush.Color := RealRowHeadAttrColor;
  TPSFillRect(RenderCanvas, Angle, RenderIn, R);
  RenderCanvas.Pen.Style := psSolid;
  if FDayView.DrawingStyle = dsNoBorder then
    InflateRect(R, -1,-1);

  // Draw row header borders
  if FDayView.DrawingStyle = dsFlat then begin
    RenderCanvas.Pen.Color := BevelShadow;
    TPSMoveTo(RenderCanvas, Angle, RenderIn, R.Right - 1, R.Top);
    TPSLineTo(RenderCanvas, Angle, RenderIn, R.Right - 1, R.Bottom - 1);
  end
  else
  if FDayView.DrawingStyle = ds3d then begin
    tmpRect := TPSRotateRectangle(Angle, RenderIn,
      Rect(R.Left + 1, R.Top, R.Right - 1, R.Bottom - 1)
    );
    DrawBevelRect(RenderCanvas, tmpRect, BevelHighlight, BevelDarkShadow);
  end;
end;

procedure TVpDayViewPainter.DrawRowHeaderLabels(R: TRect);
var
  I: Integer;
  x, y: Integer;
  lineRect: TRect;
  lineIndex: Integer;
  maxIndex: Integer;
  hour, prevHour: Integer;
  hourStr, minuteStr, timeStr: String;
  isFullHour: boolean;
begin
  // Calculate the rectangle occupied by a row
  lineRect := Rect(R.Left, R.Top, R.Right, R.Top + RealRowHeight);

  maxIndex := High(TVpDayViewOpener(FDayView).dvLineMatrix[0]);

  y := LineRect.Top;
  I := 0;
  prevHour := 0;
  while true do begin
    lineIndex := StartLine + I;
    if lineIndex > maxIndex then
      break;

    isFullHour := TVpDayViewOpener(FDayView).dvLineMatrix[0, LineIndex].Minute = 0;
    if isFullHour then begin
      hour := Ord(TVpDayViewOpener(FDayView).dvLineMatrix[0, LineIndex].Hour);
      if (hour < prevHour) then
        break;
      if (hour = 0) and (I > 0) then
        break;
      if (StopLine > -1) and (lineIndex >= StopLine) then
        break;
      prevHour := hour;

      case FDayView.TimeFormat of
        tf24Hour: minuteStr := '00';
        tf12Hour: minuteStr := IfThen(hour < 12, 'am', 'pm');
      end;
      if (Hour > 12) and (FDayView.TimeFormat = tf12Hour) then
        hourStr := IntToStr(hour - 12)
      else begin
        hourStr := IntToStr(hour);
        if (FDayView.TimeFormat = tf12Hour) and (hourStr = '0') then
          hourStr := '12';
      end;

      if (UseGran = gr60Min) or FDayView.SimpleRowTime then
      begin
        // In case of 60-min granularity paint time as simple string
        RenderCanvas.Font.Assign(FDayView.RowHeadAttributes.MinuteFont);
        {$IF VP_LCL_SCALING = 0}
        RenderCanvas.Font.Size := ScaleY(RenderCanvas.Font.Size, DesignTimeDPI);
        {$ENDIF}
        timeStr := Format('%s:%s', [hourStr, minuteStr]);
        x := lineRect.Left + FScaledTickDist;
        TPSTextOut(RenderCanvas, Angle, RenderIn, x, y + TextMargin, timeStr);
      end else
      begin
        // In all other cases, paint large hour and small minutes (or am/pm)
        // Draw minutes
        RenderCanvas.Font.Assign(FDayView.RowHeadAttributes.MinuteFont);
        {$IF VP_LCL_SCALING = 0}
        RenderCanvas.Font.Size := ScaleY(RenderCanvas.Font.Size, DesignTimeDPI);
        {$ENDIF}
        x := lineRect.Right - RenderCanvas.TextWidth(MinuteStr) - MINUTES_BORDER;
        TPSTextOut(RenderCanvas, Angle, RenderIn, x, y + TextMargin, minuteStr);

        // Draw hours
        RenderCanvas.Font.Assign(FDayView.RowHeadAttributes.HourFont);
        {$IF VP_LCL_SCALING = 0}
        RenderCanvas.Font.Size := ScaleY(RenderCanvas.Font.Size, DesignTimeDPI);
        {$ENDIF}
        dec(x, RenderCanvas.TextWidth(HourStr) + MINUTES_HOUR_DISTANCE);
        TPSTextOut(RenderCanvas, Angle, RenderIn, x, y + TextMargin{ - 2}, hourStr);
      end;
    end;

    inc(y, RealRowHeight);
    inc(I);
  end;  // while
end;

procedure TVpDayViewPainter.DrawRowHeaderTicks(R: TRect);
var
  I: Integer;
  y: Integer;
  isFullHour: Boolean;
  lineRect: TRect;
  adEvHeight: Integer;
  lineIndex: Integer;
  maxIndex: Integer;
  midnightIndex: Integer;
  minutesLen: Integer;
  hour: Integer;
begin
  // Calculate the rectangle occupied by a row
  lineRect := Rect(R.Left, R.Top, R.Right, R.Top + RealRowHeight);

  // Calculate height of all-day events rectangle
  adEvHeight := HeightOf(ADEventsRect);

  // Calculate length of minutes ticks
  RenderCanvas.Font.Assign(FDayView.RowHeadAttributes.MinuteFont);
  {$IF VP_LCL_SCALING = 0}
  RenderCanvas.Font.Size := ScaleY(RenderCanvas.Font.Size, DesignTimeDPI);
  {$ENDIF}
  minutesLen := RenderCanvas.TextWidth('00') + MINUTES_BORDER + MINUTES_HOUR_DISTANCE div 2;

  // Prepare pen
  RenderCanvas.Pen.Style := psSolid;
  RenderCanvas.Pen.Color := RealLineColor;

  y := lineRect.Top;

  // The top-most tick is not drawn, it is identical with the lower edge of
  // the NavBar block. Only if there are all-day events we must paint it.
  if adEvHeight > 0 then begin
    TPSMoveTo(RenderCanvas, Angle, RenderIn, lineRect.Right - FScaledTickDist, y);
    TPSLineTo(RenderCanvas, Angle, RenderIn, lineRect.Left + FScaledTickdist, y);
  end;

  // Begin with I = 1 because top-most tick already has been handled
  I := 1;
  maxIndex := High(TVpDayViewOpener(FDayView).dvLineMatrix[0]);
  midnightIndex := GetEndLine(0.9999, UseGran);
  while true do begin
    lineIndex := StartLine + I;
    if lineIndex > maxIndex then
      break;
    if (StopLine > -1) and (lineIndex > StopLine) then
      break;

    inc(y, RealRowHeight);
    if y > R.Bottom then
      break;

    hour := Ord(TVpDayViewOpener(FDayView).dvLineMatrix[0, LineIndex].Hour);

    if (hour = 0) and (lineIndex > midnightIndex) then  // midnight
      isFullHour := true   // to draw the 0:00 tick
    else
    if lineIndex = StopLine then
      isFullHour := true  // to draw the last hour tick
    else
      isFullHour := TVpDayViewOpener(FDayView).dvLineMatrix[0, lineIndex].Minute = 0;

    TPSMoveTo(RenderCanvas, Angle, RenderIn, lineRect.Right - FScaledTickDist, y - 1);
    if lineIndex mod FDayView.RowLinesStep = 0 then
      if isFullHour then
        // Hour tick line
        TPSLineTo(RenderCanvas, Angle, RenderIn, lineRect.Left + FScaledTickDist, y - 1)
      else
       // Minutes tick lines
       TPSLineTo(RenderCanvas, Angle, RenderIn, lineRect.Right - MinutesLen, y - 1);

    inc(I);
  end;
end;

procedure TVpDayViewPainter.CalcRowHeadRect(out ARect: TRect);
begin
  ARect := Rect(
    RealLeft,
    ADEventsRect.Bottom,
    RealLeft + 2 + RealRowHeadWidth,
    RealBottom
  );
  if FDayView.DrawingStyle <> ds3d then
    inc(ARect.Left);
end;

function TVpDayViewPainter.CalcRowHeadWidth: integer;
begin
  Result := 2 * MINUTES_BORDER + MINUTES_HOUR_DISTANCE;
  RenderCanvas.Font.Assign(FDayView.RowHeadAttributes.MinuteFont);
  {$IF VP_LCL_SCALING = 0}
  RenderCanvas.Font.Size := ScaleY(RenderCanvas.Font.Size, DesignTimeDPI);
  {$ENDIF}
  inc(Result, RenderCanvas.TextWidth('00'));
  RenderCanvas.Font.Assign(FDayView.RowHeadAttributes.HourFont);
  {$IF VP_LCL_SCALING = 0}
  RenderCanvas.Font.Size := ScaleY(RenderCanvas.Font.Size, DesignTimeDPI);
  {$ENDIF}
  inc(Result, RenderCanvas.TextWidth('33'));
  with TVpDayViewOpener(FDayView) do
    Result := Max(Result, dvDayUpBtn.Glyph.Width + dvDayDownBtn.Glyph.Width +
      dvWeekUpBtn.Glyph.Width + dvWeekDownBtn.Glyph.Width);
end;

procedure TVpDayViewPainter.FixFontHeights;
begin
  with FDayView do begin
    AllDayEventAttributes.Font.Height := GetRealFontHeight(AllDayEventAttributes.Font);
    Font.Height := GetRealFontHeight(Font);
    HeadAttributes.Font.Height := GetRealFontHeight(HeadAttributes.Font);
    RowHeadAttributes.HourFont.Height := GetRealFontHeight(RowHeadAttributes.HourFont);
    RowHeadAttributes.MinuteFont.Height := GetRealFontHeight(RowHeadAttributes.MinuteFont);
  end;
end;

procedure TVpDayViewPainter.FreeBitmaps;
begin
  dvBmpRecurring.Free;
  dvBmpCategory.Free;
  dvBmpAlarm.Free;
  dvBmpCustom.Free;
end;

procedure TVpDayViewPainter.GetIcons(Event: TVpEvent);
var
  ShowAlarm: Boolean;
  ShowRecurring: Boolean;
  ShowCategory: Boolean;
  ShowCustom: Boolean;
  Icons: TVpDVIcons;
  cat: TVpCategoryInfo;
  w: Integer;
  isOverlayed: Boolean;
  grp: TVpResourceGroup;
  imgList: TCustomImageList;
 {$IFDEF LCL}
  {$IF LCL_FullVersion >= 1090000}
  ppi: Integer;
  f: Double;
  w96: Integer;
  {$IFEND}
 {$ENDIF}
begin
  ShowAlarm := False;
  ShowRecurring := False;
  ShowCategory := False;
  ShowCustom := False;

  imgList := GetImageList;
 {$IFDEF LCL}
  {$IF LCL_FullVersion >= 1090000}
  ppi := FDayView.Font.PixelsPerInch;
  f := FDayView.GetCanvasScaleFactor;
  w96 := FDayView.DataStore.ImagesWidth;
  if imgList <> nil then
    w := imgList.SizeForPPI[w96, ppi].CX
  else
    w := w96;
  {$IFEND}
 {$ENDIF}

  if Event.AlarmSet then begin
    if (FDayView.IconAttributes.AlarmImageIndex > -1) and (imgList <> nil) then
    begin
     {$IFDEF LCL}
      {$IF LCL_FullVersion >= 1090000}
      dvBmpAlarm.PixelFormat := pf32Bit;
      dvBmpAlarm.SetSize(w, w);
      imgList.DrawForPPI(dvBmpAlarm.Canvas, 0, 0,
        FDayView.IconAttributes.AlarmImageIndex, w96, ppi, f);
      {$ELSE}
      imgList.GetBitmap(FDayView.IconAttributes.AlarmImageIndex, dvBmpAlarm)
      {$IFEND}
     {$ENDIF}
    end else
      dvBmpAlarm.Assign(FDayView.IconAttributes.AlarmBitmap);
    ShowAlarm := (dvBmpAlarm.Width <> 0) and (dvBmpAlarm.Height <> 0);
  end;

  if Event.RepeatCode <> rtNone then
  begin
    if (FDayView.IconAttributes.RecurringImageIndex > -1) and (imgList <> nil) then
    begin
     {$IFDEF LCL}
      {$IF LCL_FullVersion >= 1090000}
      dvBmpRecurring.PixelFormat := pf32Bit;
      dvBmpRecurring.SetSize(w, w);
      imgList.DrawForPPI(dvBmpRecurring.Canvas, 0, 0,
        FDayView.IconAttributes.RecurringImageIndex, w96, ppi, f);
      {$ELSE}
      imgList.GetBitmap(FDayview.IconAttributes.RecurringImageIndex, dvBmpRecurring)
      {$IFEND}
     {$ENDIF}
    end else
      dvBmpRecurring.Assign(FDayView.IconAttributes.RecurringBitmap);
    ShowRecurring := (dvBmpRecurring.Width <> 0) and (dvBmpRecurring.Height <> 0);
  end;

  if Assigned(FDayView.DataStore) then
  begin
    isOverlayed := Event.IsOverlayed;
    grp := FDayView.Datastore.Resource.Group;
    if isOverlayed and (grp <> nil) and (not (odEventCategory in grp.ShowDetails)) then
    begin
      dvBmpCategory.Width := 0;
      dvBmpCategory.Height := 0;
    end else
    if Event.Category < 10 then
    begin
      cat := FDayView.Datastore.CategoryColorMap.GetCategory(Event.Category);
      if (cat.ImageIndex > -1) and (imgList <> nil) then
      begin
       {$IFDEF LCL}
        {$IF LCL_FullVersion >= 1090000}
        dvBmpCategory.PixelFormat := pf32Bit;
        dvBmpCategory.SetSize(w, w);
        imgList.DrawForPPI(dvBmpCategory.Canvas, 0, 0, cat.ImageIndex, w96, ppi, f);
        {$ELSE}
        imgList.GetBitmap(cat.ImageIndex, dvBmpCategory)
        {$IFEND}
       {$ENDIF}
      end else
        dvBmpCategory.Assign(cat.Bitmap);
    end else
    begin
      dvBmpCategory.Width  := 0;
      dvBmpCategory.Height := 0;
    end;
    ShowCategory := (dvBmpCategory.Width <> 0) and (dvBmpCategory.Height <> 0);
  end;

  dvBmpCustom.Width  := 0;
  dvBmpCustom.Height := 0;

  if not FDayView.IconAttributes.ShowAlarmBitmap then
    ShowAlarm := False;
  if not FDayView.IconAttributes.ShowCategoryBitmap then
    ShowCategory := False;
  if not FDayView.IconAttributes.ShowRecurringBitmap then
    ShowRecurring := False;

  if Assigned(FDayView.OnDrawIcons) then begin
    Icons[itAlarm].Show := ShowAlarm;
    Icons[itAlarm].Bitmap := dvBmpAlarm;
    Icons[itRecurring].Show := ShowRecurring;
    Icons[itRecurring].Bitmap := dvBmpRecurring;
    Icons[itCategory].Show := ShowCategory;
    Icons[itCategory].Bitmap := dvBmpCategory;
    Icons[itCustom].Show := ShowCustom;
    Icons[itCustom].Bitmap := dvBmpCustom;

    FDayView.OnDrawIcons (Self, Event, Icons);

    ShowAlarm := Icons[itAlarm].Show;
    ShowRecurring := Icons[itRecurring].Show;
    ShowCategory := Icons[itCategory].Show;
    ShowCustom := Icons[itCustom].Show;
  end;

  if not ShowAlarm then begin
    dvBmpAlarm.Width := 0;
    dvBmpAlarm.Height := 0;
  end;

  if not ShowRecurring then begin
    dvBmpRecurring.Width := 0;
    dvBmpRecurring.Height := 0;
  end;

  if not ShowCategory then begin
    dvBmpCategory.Width := 0;
    dvBmpCategory.Height := 0;
  end;

  if not ShowCustom then begin
    dvBmpCustom.Width := 0;
    dvBmpCustom.Height := 0;
  end;

  AlarmW := Round(dvBmpAlarm.Width * Scale);
  RecurringW := Round(dvBmpRecurring.Width * Scale);
  CategoryW := Round(dvBmpCategory.Width * Scale);
  CustomW := Round(dvBmpCustom.Width);
  AlarmH := Round(dvBmpAlarm.Height * Scale);
  RecurringH := Round(dvBmpRecurring.Height * Scale);
  CategoryH := Round(dvBmpCategory.Height * Scale);
  CustomH := Round(dvBmpCustom.Height * Scale);
end;

{ initialize the all-day events area }
function TVpDayViewPainter.InitAllDayEventsRect: TRect;
begin
  Result.Left := RealLeft + 2 + RealRowHeadWidth;  // wp: was 3
  Result.Top := RealTop + RealColHeadHeight;
  Result.Right := FDayView.ClientRect.Right;
  Result.Bottom := Result.Top;
end;

procedure TVpDayViewPainter.InitColors;
begin
  if DisplayOnly then begin
    BevelShadow := clBlack;
    BevelHighlight := clBlack;
    BevelDarkShadow := clBlack;
    BevelFace := clBlack;
    WindowColor := clWhite;
    HighlightText := clBlack;
    RealHeadAttrColor := clSilver;
    RealRowHeadAttrColor := clSilver;
    RealLineColor := clBlack;
    RealColor := clWhite;
    HighlightBkg := clWhite;
    RealADEventBkgColor := clWhite;
    ADEventAttrBkgColor := clWhite;
    ADEventBorderColor := clBlack;
  end else begin
    BevelShadow := clBtnShadow;
    BevelHighlight := clBtnHighlight;
    BevelDarkShadow := cl3DDkShadow;
    BevelFace := clBtnFace;
    WindowColor := clWindow;
    HighlightText := clHighlightText;
    HighlightBkg := clHighlight;
    RealHeadAttrColor := FDayView.HeadAttributes.Color;
    RealRowHeadAttrColor := FDayView.RowHeadAttributes.Color;
    RealLineColor := FDayView.LineColor;
    RealColor := FDayView.Color;
    RealADEventBkgColor := FDayView.AllDayEventAttributes.BackgroundColor;
    ADEventAttrBkgColor := FDayView.AllDayEventAttributes.EventBackgroundColor;
    ADEventBorderColor := FDayView.AllDayEventAttributes.EventBorderColor;
  end;
end;

procedure TVpDayViewPainter.InitializeEventRectangles;
var
  I : Integer;
begin
  EventCount := 0;
  with TVpDayViewOpener(FDayView) do
    for I := 0 to pred(Length(dvEventArray)) do begin
      dvEventArray[I].Rec.Left := -1;
      dvEventArray[I].Rec.Top := -1;
      dvEventArray[I].Rec.Right := -1;
      dvEventArray[I].Rec.Bottom := -1;
      dvEventArray[I].Event := nil;
    end;
end;

procedure TVpDayViewPainter.RenderToCanvas(ARenderIn: TRect;
  AAngle: TVpRotationAngle; AScale: Extended; ARenderDate: TDateTime;
  AStartLine, AStopLine: Integer; AUseGran: TVpGranularity; ADisplayOnly: Boolean);
{wp: DisplayOnly is poorly-named. It is false during screen output in the form,
  it is true during printing and in print preview }
begin
  inherited;

  // Make sure to use only the date part
  ARenderDate := trunc(ARenderDate);

  InitColors;
  SavePenBrush;
  InitPenBrush;
  InitializeEventRectangles;
  if ADisplayOnly then FixFontHeights;

  SetMeasurements;

  ScrollbarOffset := 0;
  with TVpDayViewOpener(FDayView) do
    if ADisplayOnly then begin
      // use printer settings
      SetTimeIntervals(ControlLink.Printer.Granularity);
      TopLine := StartLine;
      StartLine := TopLine;
    end else
    begin
      // use screen settings
      SetTimeIntervals(Granularity);
      if StartLine < 0 then
        StartLine := FDayView.TopLine;
      if VisibleLines < LineCount then
        ScrollbarOffset := GetSystemMetrics(SM_CYHSCROLL);
    end;

  Rgn := CreateRectRgn(RenderIn.Left, RenderIn.Top, RenderIn.Right, RenderIn.Bottom);
  try
    SelectClipRgn(RenderCanvas.Handle, Rgn);

    // Calculate the RealNumDays (The number of days the control covers)
    RealNumDays := TVpDayViewOpener(FDayView).GetRealNumDays(RenderDate);

    // Calculate row and column header
    RealRowHeight := TVpDayViewOpener(FDayView).dvCalcRowHeight(Scale, UseGran);
    RealRowHeadWidth := CalcRowHeadWidth;
    RealColHeadHeight := TVpDayViewOpener(FDayView).dvCalcColHeadHeight(Scale);
    // RowHeadRect and RealVisibleLines are calculated below...

    // Draw the all-day events
    DrawAllDayEvents;

    // Draw the area in the top left corner, where the nav buttons go.
    DrawNavBtnBackground;

    // Draw row headers
    CalcRowHeadRect(RowHeadRect);

    RealVisibleLines := TVpDayViewOpener(FDayView).dvCalcVisibleLines(
      HeightOf(RowHeadRect),
      RealColHeadHeight,
      RealRowHeight,
      Scale,
      StartLine,
      StopLine
    );

    if Assigned(FDayView.OwnerDrawRowHeader) then begin
      Drawn := false;
      FDayView.OwnerDrawRowHeader(self, RenderCanvas, RowHeadRect, RealRowHeight, Drawn);
      if not Drawn then
        DrawRowHeader(RowHeadRect);
    end else
      DrawRowHeader(RowHeadRect);

    // Draw the regular events
    DrawRegularEvents;

    // Draw borders
    DrawBorders;

    // Place and draw navigation buttons
    DrawNavBtns;

    // Restore RenderCanvas settings
    RestorePenBrush;

  finally
    SelectClipRgn(RenderCanvas.Handle, 0);
    DeleteObject(Rgn);
  end;
end;

procedure TVpDayViewPainter.PopulateEventArray(ARenderDate: TDateTime);
var
  EventList: TList;
  event: TVpEvent;
  level: Integer;
  I, J: Integer;
  thisTime: TTime;
begin
  { Set the event array's max size }
  SetLength(EventArray, MaxVisibleEvents);  // EventArray is global within painter

  { Initialize the new matrix }
  for I := 0 to pred(MaxVisibleEvents) do begin
    EventArray[I].Event := nil;
    EventArray[I].Level := 0;
    EventArray[I].OLLevels := 0;
    EventArray[I].WidthDivisor := 0;
  end;

  EventList := TList.Create;
  try
    {Get all of the events for this day}
    FDayView.DataStore.Resource.Schedule.EventsByDate(ARenderDate, EventList);

    { Discard AllDayEvents, because they are drawn separately. }
    for I := pred(EventList.Count) downto 0 do begin
      event := EventList[I];
      if event.AllDayEvent then
        EventList.Delete(I);
    end;

    { Now sort times in ascending order. This must be done because the event
      list can contain recurring events which have the wrong date part }
    EventList.Sort(@CompareEventsByTimeOnly);

    { Arrange this day's events in the event matrix }
    level := 0;
    I := 0;
    while EventList.Count > 0 do begin
      { Iterate through the (corrected) events, and place them all at the proper place
        in the EventMatrix, according to their start and end times }
      J := 0;
      ThisTime := 0.0;
      while (J < EventList.Count) and (J < MaxVisibleEvents) do begin
        event := EventList[J];
        if frac(event.StartTime) >= thisTime then begin
          thisTime := frac(event.EndTime);
          { Handle end times of midnight }
          if thisTime = 0 then
            thisTime := EncodeTime(23, 59, 59, 0);
          EventList.Delete(J);
          EventArray[I].Event := event;
          EventArray[I].Level := level;
          Inc(I);
          Continue;
        end
        else
          Inc(J);
      end;
      Inc(level);
    end;

  finally
    EventList.Free;
  end;
end;

procedure TVpDayViewPainter.PrepareEventRect(AWidthDivisor, ALevel: Integer;
  var AEventRect: TRect);
var
  eventWidth: Integer;
begin
  if AEventRect.Left < VisibleRect.Left then
    AEventRect.Left := VisibleRect.Left;

  if AEventRect.Top < VisibleRect.Top then
    AEventRect.Top := VisibleRect.Top;

  if AEventRect.Bottom = -1 then
    AEventRect.Bottom := AEventRect.Top + RealRowHeight
  else
  if (AEventRect.Bottom < VisibleRect.Top) then
    AEventRect.Bottom := VisibleRect.Bottom;

  eventWidth := WidthOf(VisibleRect) div AWidthDivisor;

  { Slide the rect over to correspond with the level }
  if ALevel > 0 then
    AEventRect.Left := AEventRect.Left + eventWidth * ALevel
    { added because level 0 events were one pixel too far to the right }
  else
    AEventRect.Left := AEventRect.Left - 1;
  AEventRect.Right := AEventRect.Left + eventWidth;; // + 1;  -- wp: removed to avoid painting over the right border line

  dec(AEventRect.Top);  // wp: without this, the top border line of the event is thicker than the others
end;

{ remove the date portion from the start and end times }
procedure TVpDayViewPainter.PrepareEventTimes(AEvent: TVpEvent;
  ARenderDate: TDateTime; out AStartTime, AEndTime: TDateTime);
begin
(*  -- original
     { remove the date portion from the start and end times }
     EventSTime := Event.StartTime;
     EventETime := Event.EndTime;
     if trunc(EventSTime) < trunc(ARenderDate) then //First Event
       EventSTime := 0+trunc(ARenderDate);
     if trunc(EventETime) > trunc(ARenderDate) then //First Event
       EventETime := 0.999+trunc(ARenderDate);
     EventSTime := EventSTime - ARenderDate;
     EventETime := EventETime - ARenderDate;
     { Find the line on which this event starts }
     EventSLine := GetStartLine(EventSTime, Granularity);
     { Handle End Times of Midnight }
     if EventETime = 0 then
       EventETime := EncodeTime (23, 59, 59, 0);
 *)

  AStartTime := AEvent.StartTime;
  AEndTime := AEvent.EndTime;

  if (AStartTime < trunc(ARenderDate)) and (AEvent.RepeatCode = rtNone) then  // First Event
    AStartTime := trunc(ARenderDate)
  else if (AEvent.RepeatCode <> rtNone) then
    AStartTime := frac(AStartTime) + trunc(ARenderDate);

  if (trunc(AEndTime) > trunc(ARenderDate)) and (AEvent.RepeatCode = rtNone) then  // First Event
  // wp: wouldn't this be better?
  //  AEndtime := trunc(ARenderDate) + 1 - 1.0 / (24 * 60 * 60)  // 1 sec before midnight
    AEndTime := 0.999 + trunc(ARenderDate)
  else if (AEvent.RepeatCode <> rtNone) then
    AEndTime := frac(AEndTime) + trunc(ARenderDate);

  AStartTime := AStartTime - trunc(ARenderDate);
  AEndTime := AEndTime - trunc(ARenderDate);

  { Handle End Times of Midnight }
  if AEndTime = 0 then
    AEndTime := EncodeTime(23, 59, 59, 0);    // wp: Is the date part correct here?
end;

procedure TVpDayViewPainter.ScaleIcons(EventRect: TRect);
var
  h: Integer;
begin
  h := EventRect.Bottom - EventRect.Top - 2;

  if (dvBmpAlarm.Height > h) and (dvBmpAlarm.Height * dvBmpAlarm.Width <> 0)
  then begin
    AlarmW := Trunc((h / dvBmpAlarm.Height) * dvBmpAlarm.Width);
    AlarmH := h;
  end;

  if (dvBmpRecurring.Height > h) and (dvBmpRecurring.Height * dvBmpRecurring.Width <> 0)
  then begin
    RecurringW := Trunc((h / dvBmpRecurring.Height) * dvBmpRecurring.Width);
    RecurringH := h;
  end;

  if (dvBmpCategory.Height > h) and (dvBmpCategory.Height * dvBmpCategory.Width <> 0)
  then begin
    CategoryW := Trunc((h / dvBmpCategory.Height) *  dvBmpCategory.Width);
    CategoryH := h;
  end;

  if (dvBmpCustom.Height > h) and (dvBmpCustom.Height * dvBmpCustom.Width <> 0)
  then begin
    CustomW := Trunc((h / dvBmpCustom.Height) * dvBmpCustom.Width);
    CustomH := h;
  end;
end;

procedure TVpDayViewPainter.SetMeasurements;
begin
  inherited;
  TVpDayViewOpener(FDayView).dvCalcColHeadHeight(Scale);
  FScaledGutterWidth := Round(FDayView.GutterWidth * Scale);
  FScaledIconMargin := Round(ICON_MARGIN * Scale);
  FScaledTickdist := Round(TICK_Dist * Scale);
end;

procedure TVpDayViewPainter.VerifyMaxWidthDevisors;
var
  I, K: Integer;
  Event1, Event2: TVpEvent;
  tStart1, tEnd1, tStart2, tEnd2: TTime;
begin
  for I := 0 to pred(MaxVisibleEvents) do begin
    { if we hit a null event, then we're through }
    if EventArray[I].Event = nil then
      Break;

    { otherwise keep going }
    Event1 := EventArray[I].Event;

    { get start and end times without the date part }
    tStart1 := frac(Event1.StartTime);
    tEnd1 := frac(Event1.EndTime);

    { initialize the WidthDivisor for this record }
    EventArray[I].WidthDivisor := 1;

    { Now iterate through all events and get the maximum OLEvents value of all
      the overlapping events }
    for K := 0 to pred(MaxVisibleEvents) do begin
      { if we hit a null event, then we're through }
      if EventArray[K].Event = nil then
        Break;

      Event2 := EventArray[K].Event;
      tStart2 := frac(Event2.StartTime);
      tEnd2 := frac(Event2.EndTime);

      { if the Tmp event overlaps with Event, then check its WidthDivisor }
      if TimeInRange(tStart2, tStart1, tEnd1, false) or
         TimeInRange(tEnd2, tStart1, tEnd1, false) or
         ((tStart2 <= tStart1) and (tEnd2 >= tEnd1))
      then begin
         if EventArray[I].WidthDivisor < EventArray[K].WidthDivisor then
           EventArray[I].WidthDivisor := EventArray[K].WidthDivisor;
       end;
    end;

    {  -- original
      if (TimeInRange(Event2.StartTime, Event1.StartTime, Event1.EndTime, false)
        or TimeInRange(Event2.EndTime, Event1.StartTime, Event1.EndTime, false))
      or ((Event2.StartTime <= Event1.StartTime)
        and (Event2.EndTime >= Event1.EndTime))
        }

        {
      if TimeInRange(frac(Event2.StartTime), frac(Event1.StartTime), frac(Event1.EndTime), false) or
         TimeInRange(frac(Event2.EndTime), frac(Event1.StartTime), frac(Event1.EndTime), false) or
        ((frac(Event2.StartTime) <= frac(Event1.StartTime)) and (frac(Event2.EndTime) >= frac(Event1.EndTime)))
      then begin
        if EventArray[I].WidthDivisor < EventArray[K].WidthDivisor then
          EventArray[I].WidthDivisor := EventArray[K].WidthDivisor;
      end;
          }
  end;
end;


end.