Improves FPSpreadsheet examples and improves the Grid component

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@1229 8e941d3f-bd1b-0410-a28a-d453659cc2b4

components/fpspreadsheet/examples/fpschart/fpschart.lpi

@@ -4,6 +4,7 @@
     <Version Value="7"/>
     <General>
       <Flags>
+        <AlwaysBuild Value="False"/>
         <UseDefaultCompilerOptions Value="True"/>
       </Flags>
       <SessionStorage Value="InProjectDir"/>
@@ -72,6 +73,9 @@
       </SyntaxOptions>
     </Parsing>
     <Linking>
+      <Debugging>
+        <GenerateDebugInfo Value="True"/>
+      </Debugging>
       <Options>
         <Win32>
           <GraphicApplication Value="True"/>
@@ -79,6 +83,9 @@
       </Options>
     </Linking>
     <Other>
+      <CompilerMessages>
+        <UseMsgFile Value="True"/>
+      </CompilerMessages>
       <CompilerPath Value="$(CompPath)"/>
     </Other>
   </CompilerOptions>

components/fpspreadsheet/examples/fpschart/fpschart.lpr

@@ -13,7 +13,6 @@ uses
 {$R *.res}
 
 begin
-  Application.Title:='project1';
   Application.Initialize;
   Application.CreateForm(TFPSChartForm, FPSChartForm);
   Application.Run;

components/fpspreadsheet/examples/fpschart/mainform.lfm

@@ -1,16 +1,17 @@
 object FPSChartForm: TFPSChartForm
-  Left = 179
-  Height = 331
-  Top = 157
-  Width = 742
+  Left = 239
+  Height = 382
+  Top = 154
+  Width = 700
   Caption = 'FPSpreadsheet Chart Example'
-  ClientHeight = 331
-  ClientWidth = 742
+  ClientHeight = 382
+  ClientWidth = 700
+  OnCreate = FormCreate
   LCLVersion = '0.9.29'
   object MyChart: TChart
-    Left = 400
+    Left = 352
     Height = 240
-    Top = 24
+    Top = 136
     Width = 336
     AxisList = <    
       item
@@ -37,26 +38,106 @@ object FPSChartForm: TFPSChartForm
   object WorksheetGrid: TsWorksheetGrid
     Left = 16
     Height = 240
-    Top = 24
-    Width = 360
+    Top = 136
+    Width = 328
     Options = [goFixedVertLine, goFixedHorzLine, goVertLine, goHorzLine, goRangeSelect, goEditing, goSmoothScroll]
     TabOrder = 1
   end
   object btnCreateGraphic: TButton
-    Left = 104
+    Left = 464
     Height = 25
-    Top = 280
+    Top = 56
     Width = 128
     Caption = 'Create Graphic'
     OnClick = btnCreateGraphicClick
     TabOrder = 2
   end
+  object Label1: TLabel
+    Left = 16
+    Height = 34
+    Top = 8
+    Width = 676
+    AutoSize = False
+    Caption = 'Please add data to the grid or load it from a file, then choose the location of the data for the X and Y axises and click on the button "Create Graphic" to generate a chart.'
+    ParentColor = False
+    WordWrap = True
+  end
+  object editSourceFile: TFileNameEdit
+    Left = 152
+    Height = 22
+    Top = 48
+    Width = 136
+    DialogOptions = []
+    FilterIndex = 0
+    HideDirectories = False
+    ButtonWidth = 23
+    NumGlyphs = 0
+    MaxLength = 0
+    TabOrder = 3
+  end
+  object Label2: TLabel
+    Left = 14
+    Height = 18
+    Top = 51
+    Width = 130
+    Caption = 'Source Spreadsheet:'
+    ParentColor = False
+  end
+  object btnLoadSpreadsheet: TButton
+    Left = 320
+    Height = 25
+    Top = 48
+    Width = 75
+    Caption = 'Load'
+    OnClick = btnLoadSpreadsheetClick
+    TabOrder = 4
+  end
+  object editXAxis: TLabeledEdit
+    Left = 64
+    Height = 22
+    Top = 80
+    Width = 80
+    EditLabel.AnchorSideLeft.Control = editXAxis
+    EditLabel.AnchorSideTop.Control = editXAxis
+    EditLabel.AnchorSideTop.Side = asrCenter
+    EditLabel.AnchorSideRight.Control = editXAxis
+    EditLabel.AnchorSideBottom.Control = editXAxis
+    EditLabel.Left = 17
+    EditLabel.Height = 18
+    EditLabel.Top = 82
+    EditLabel.Width = 44
+    EditLabel.Caption = 'X-Axis:'
+    EditLabel.ParentColor = False
+    LabelPosition = lpLeft
+    TabOrder = 5
+    Text = 'A1:A5'
+  end
+  object EditYAxis: TLabeledEdit
+    Left = 208
+    Height = 22
+    Top = 80
+    Width = 80
+    EditLabel.AnchorSideLeft.Control = EditYAxis
+    EditLabel.AnchorSideTop.Control = EditYAxis
+    EditLabel.AnchorSideTop.Side = asrCenter
+    EditLabel.AnchorSideRight.Control = EditYAxis
+    EditLabel.AnchorSideBottom.Control = EditYAxis
+    EditLabel.Left = 161
+    EditLabel.Height = 18
+    EditLabel.Top = 82
+    EditLabel.Width = 44
+    EditLabel.Caption = 'Y-Axis:'
+    EditLabel.ParentColor = False
+    LabelPosition = lpLeft
+    TabOrder = 6
+    Text = 'B1:B5'
+  end
   object FPSChartSource: TsWorksheetChartSource
     PointsNumber = 5
     YFirstCellCol = 1
     XSelectionDirection = fpsVerticalSelection
     YSelectionDirection = fpsVerticalSelection
-    left = 376
-    top = 264
+    left = 632
+    top = 56
   end
 end

components/fpspreadsheet/examples/fpschart/mainform.pas

@@ -6,7 +6,8 @@ interface
 
 uses
   Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
-  StdCtrls, Grids, fpspreadsheetchart, fpspreadsheetgrid, TAGraph, TASeries;
+  StdCtrls, Grids, EditBtn, ExtCtrls, fpspreadsheetchart, fpspreadsheetgrid,
+  TAGraph, TASeries;
 
 type
   
@@ -14,11 +15,19 @@ type
 
   TFPSChartForm = class(TForm)
     btnCreateGraphic: TButton;
+    btnLoadSpreadsheet: TButton;
+    editSourceFile: TFileNameEdit;
+    Label1: TLabel;
+    Label2: TLabel;
+    editXAxis: TLabeledEdit;
+    EditYAxis: TLabeledEdit;
     MyChart: TChart;
     FPSChartSource: TsWorksheetChartSource;
     MyChartLineSeries: TLineSeries;
     WorksheetGrid: TsWorksheetGrid;
     procedure btnCreateGraphicClick(Sender: TObject);
+    procedure btnLoadSpreadsheetClick(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
   private
     { private declarations }
   public
@@ -30,14 +39,40 @@ var
 
 implementation
 
+uses
+  // FPSpreadsheet and supported formats
+  fpspreadsheet, xlsbiff8, xlsbiff5, xlsbiff2, xlsxooxml, fpsopendocument;
+
 {$R *.lfm}
 
 { TFPSChartForm }
 
 procedure TFPSChartForm.btnCreateGraphicClick(Sender: TObject);
 begin
+  FPSChartSource.LoadPropertiesFromStrings(editXAxis.Text, editYAxis.Text, '', '', '');
   FPSChartSource.LoadFromWorksheetGrid(WorksheetGrid);
 end;
 
+procedure TFPSChartForm.btnLoadSpreadsheetClick(Sender: TObject);
+var
+  Format: TsSpreadsheetFormat;
+  lExt: string;
+begin
+  // First some logic to detect the format from the extension
+  lExt := ExtractFileExt(editSourceFile.Text);
+  if lExt = STR_EXCEL_EXTENSION then Format := sfExcel2
+  else if lExt = STR_OOXML_EXCEL_EXTENSION then Format := sfOOXML
+  else if lExt = STR_OPENDOCUMENT_CALC_EXTENSION then Format := sfOpenDocument
+  else raise Exception.Create('Invalid File Extension');
+
+  // Now the actual loading
+  WorksheetGrid.LoadFromSpreadsheetFile(editSourceFile.Text, Format);
+end;
+
+procedure TFPSChartForm.FormCreate(Sender: TObject);
+begin
+  editSourceFile.InitialDir := ExtractFilePath(ParamStr(0));
+end;
+
 end.
 

components/fpspreadsheet/fpsopendocument.pas

@@ -189,7 +189,8 @@ begin
 
         //process each cell of the row
         CellNode:=RowNode.FindNode('table:table-cell');
-        while Assigned(CellNode) do begin
+        while Assigned(CellNode) do
+        begin
           ParamColsRepeated:=GetAttrValue(CellNode,'table:number-columns-repeated');
           if ParamColsRepeated='' then ParamColsRepeated:='1';
 
@@ -200,11 +201,9 @@ begin
             for ColsCount:=0 to StrToInt(ParamColsRepeated)-1 do begin
               if ParamValueType='string' then
                 ReadLabel(Row+RowsCount,Col+ColsCount,CellNode)
-              else
-              if ParamFormula<>'' then
+              else if ParamFormula<>'' then
                 ReadFormula(Row+RowsCount,Col+ColsCount,CellNode)
-              else
-              if ParamValueType='float' then
+              else if ParamValueType='float' then
                 ReadNumber(Row+RowsCount,Col+ColsCount,CellNode);
             end; //for ColsCount
           end; //for RowsCount
@@ -226,7 +225,8 @@ end;
 
 procedure TsSpreadOpenDocReader.ReadFormula(ARow: Word; ACol : Word; ACellNode : TDOMNode);
 begin
-
+  // For now just read the number
+  ReadNumber(ARow, ACol, ACellNode);
 end;
 
 procedure TsSpreadOpenDocReader.ReadLabel(ARow: Word; ACol : Word; ACellNode : TDOMNode);
@@ -237,14 +237,21 @@ end;
 procedure TsSpreadOpenDocReader.ReadNumber(ARow: Word; ACol : Word; ACellNode : TDOMNode);
 var
   FSettings: TFormatSettings;
-  Value: String;
+  Value, Str: String;
+  lNumber: Double;
 begin
   FSettings.DecimalSeparator:='.';
   Value:=GetAttrValue(ACellNode,'office:value');
-  if UpperCase(Value)='1.#INF' then begin
+  if UpperCase(Value)='1.#INF' then
+  begin
     FWorkSheet.WriteNumber(Arow,ACol,1.0/0.0);
-  end else begin
-    FWorkSheet.WriteNumber(Arow,ACol,StrToFloat(GetAttrValue(ACellNode,'office:value'),FSettings));
+  end
+  else
+  begin
+    // Don't merge, or else we can't debug
+    Str := GetAttrValue(ACellNode,'office:value');
+    lNumber := StrToFloat(Str,FSettings);
+    FWorkSheet.WriteNumber(Arow,ACol,lNumber);
   end;
 end;
 

components/fpspreadsheet/fpspreadsheet.pas

@@ -74,7 +74,14 @@ type
 
   TCellContentType = (cctEmpty, cctFormula, cctRPNFormula, cctNumber, cctUTF8String);
   
-  {@@ Cell structure for TsWorksheet }
+  {@@ Cell structure for TsWorksheet
+
+      Never suppose that all *Value fields are valid,
+      only one of the ContentTypes is valid. For other fields
+      use TWorksheet.ReadAsUTF8Text and similar methods
+
+      @see TWorksheet.ReadAsUTF8Text
+  }
 
   TCell = record
     Col: Byte; // zero-based
@@ -211,6 +218,8 @@ procedure RegisterSpreadFormat(
   AWriterClass: TsSpreadWriterClass;
   AFormat: TsSpreadsheetFormat);
 
+
+
 implementation
 
 uses

components/fpspreadsheet/fpspreadsheetchart.pas

@@ -19,12 +19,10 @@ uses
   // FPSpreadsheet Visual
   fpspreadsheetgrid,
   // FPSpreadsheet
-  fpspreadsheet;
+  fpspreadsheet, fpsutils;
 
 type
 
-  TsSelectionDirection = (fpsVerticalSelection, fpsHorizontalSelection);
-
   {@@ Chart data source designed to work together with TChart from Lazarus
     to display the data.
 
@@ -60,6 +58,7 @@ type
     constructor Create(AOwner: TComponent); override;
     destructor Destroy; override;
     procedure LoadFromWorksheetGrid(const AValue: TsWorksheetGrid);
+    procedure LoadPropertiesFromStrings(AXInterval, AYInterval, AXTitle, AYTitle, ATitle: string);
   public
   published
 //    property WorksheetGrid: TsWorksheetGrid read FWorksheetGrid write SetWorksheetGrid;
@@ -205,4 +204,16 @@ begin
   Notify;
 end;
 
+procedure TsWorksheetChartSource.LoadPropertiesFromStrings(AXInterval,
+  AYInterval, AXTitle, AYTitle, ATitle: string);
+var
+  lXCount, lYCount: Integer;
+begin
+  ParseIntervalString(AXInterval, FXFirstCellRow, FXFirstCellCol, lXCount, FXSelectionDirection);
+  ParseIntervalString(AYInterval, FYFirstCellRow, FYFirstCellCol, lYCount, FYSelectionDirection);
+  if lXCount <> lYCount then raise Exception.Create(
+    'TsWorksheetChartSource.LoadPropertiesFromStrings: Interval sizes don''t match');
+  FPointsNumber := lXCount;
+end;
+
 end.

components/fpspreadsheet/fpspreadsheetgrid.pas

@@ -31,6 +31,7 @@ type
     { methods }
     constructor Create(AOwner: TComponent); override;
     procedure LoadFromWorksheet(AWorksheet: TsWorksheet);
+    procedure LoadFromSpreadsheetFile(AFileName: string; AFormat: TsSpreadsheetFormat; AWorksheetIndex: Integer = 0);
     procedure SaveToWorksheet(AWorksheet: TsWorksheet);
     property DisplayFixedColRow: Boolean read FDisplayFixedColRow write SetDisplayFixedColRow;
   end;
@@ -210,7 +211,7 @@ begin
   begin
     lCol := lCell^.Col;
     lRow := lCell^.Row;
-    lStr := lCell^.UTF8StringValue;
+    lStr := FWorksheet.ReadAsUTF8Text(lRow, lCol);
 
     if DisplayFixedColRow then
       SetCells(lCol + 1, lRow + 1, lStr)
@@ -221,6 +222,20 @@ begin
   end;
 end;
 
+procedure TsCustomWorksheetGrid.LoadFromSpreadsheetFile(AFileName: string;
+  AFormat: TsSpreadsheetFormat; AWorksheetIndex: Integer);
+var
+  lWorkbook: TsWorkbook;
+begin
+  lWorkbook := TsWorkbook.Create;
+  try
+    lWorkbook.ReadFromFile(AFileName, AFormat);
+    LoadFromWorksheet(lWorkbook.GetWorksheetByIndex(AWorksheetIndex));
+  finally
+    lWorkbook.Free;
+  end;
+end;
+
 procedure TsCustomWorksheetGrid.SaveToWorksheet(AWorksheet: TsWorksheet);
 var
   x, y: Integer;

components/fpspreadsheet/fpsutils.pas

@@ -1,3 +1,6 @@
+{
+  Utility functions from FPSpreadsheet
+}
 unit fpsutils;
 
 {$mode objfpc}{$H+}
@@ -5,8 +8,13 @@ unit fpsutils;
 interface
 
 uses
-  Classes, SysUtils; 
+  Classes, SysUtils, StrUtils;
 
+// Exported types
+type
+  TsSelectionDirection = (fpsVerticalSelection, fpsHorizontalSelection);
+
+// Endianess helper functions
 function WordToLE(AValue: Word): Word;
 function DWordToLE(AValue: Cardinal): Cardinal;
 function IntegerToLE(AValue: Integer): Integer;
@@ -16,6 +24,17 @@ function WordLEtoN(AValue: Word): Word;
 function DWordLEtoN(AValue: Cardinal): Cardinal;
 function WideStringLEToN(const AValue: WideString): WideString;
 
+// Other routines
+function ParseIntervalString(const AStr: string;
+  var AFirstCellRow, AFirstCellCol, ACount: Integer;
+  var ADirection: TsSelectionDirection): Boolean;
+function ParseCellString(const AStr: string;
+  var ACellRow, ACellCol: Integer): Boolean;
+function ParseCellRowString(const AStr: string;
+  var AResult: Integer): Boolean;
+function ParseCellColString(const AStr: string;
+  var AResult: Integer): Boolean;
+
 implementation
 
 {
@@ -114,5 +133,136 @@ begin
   {$ENDIF}
 end;
 
+{@@
+  Parses strings like A5:A10 into an selection interval information
+}
+function ParseIntervalString(const AStr: string;
+  var AFirstCellRow, AFirstCellCol, ACount: Integer;
+  var ADirection: TsSelectionDirection): Boolean;
+var
+  Cells: TStringList;
+  LastCellRow, LastCellCol: Integer;
+begin
+  Result := True;
+
+  // First get the cells
+  Cells := TStringList.Create;
+  ExtractStrings([':'],[], PChar(AStr), Cells);
+
+  // Then parse each of them
+  Result := ParseCellString(Cells[0], AFirstCellRow, AFirstCellCol);
+  if not Result then Exit;
+  Result := ParseCellString(Cells[1], LastCellRow, LastCellCol);
+  if not Result then Exit;
+
+  if AFirstCellRow = LastCellRow then
+  begin
+    ADirection := fpsHorizontalSelection;
+    ACount := LastCellCol - AFirstCellCol + 1;
+  end
+  else if AFirstCellCol = LastCellCol then
+  begin
+    ADirection := fpsVerticalSelection;
+    ACount := LastCellRow - AFirstCellRow + 1;
+  end
+  else Exit(False);
+end;
+
+{@@
+  Parses a cell string, like 'A1' into zero-based column and row numbers
+
+  The parser is a simple state machine, with the following states:
+
+  0 - Reading Column part 1 (necesserely needs a letter)
+  1 - Reading Column part 2, but could be the first number as well
+  2 - Reading Row
+}
+function ParseCellString(const AStr: string; var ACellRow, ACellCol: Integer): Boolean;
+var
+  i: Integer;
+  state: Integer;
+  Col, Row: string;
+  lChar: Char;
+const
+  cLetters = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
+   'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'W', 'X', 'Y', 'Z'];
+  cDigits = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
+begin
+  // Starting state
+  Result := True;
+  state := 0;
+  Col := '';
+  Row := '';
+
+  // Separates the string into a row and a col
+  for i := 0 to Length(AStr) - 1 do
+  begin
+    lChar := AStr[i + 1];
+
+    case state of
+
+    0:
+    begin
+      if lChar in cLetters then
+      begin
+        Col := lChar;
+        state := 1;
+      end
+      else Exit(False);
+    end;
+
+    1:
+    begin
+      if lChar in cLetters then Col := Col + lChar
+      else if lChar in cDigits then
+      begin
+        Row := lChar;
+        state := 2;
+      end
+      else Exit(False);
+    end;
+
+    2:
+    begin
+      if lChar in cDigits then Row := Row + lChar
+      else Exit(False);
+    end;
+
+    end;
+  end;
+
+  // Now parses each separetely
+  ParseCellRowString(Row, ACellRow);
+  ParseCellColString(Col, ACellCol);
+end;
+
+function ParseCellRowString(const AStr: string; var AResult: Integer): Boolean;
+begin
+  try
+    AResult := StrToInt(AStr) - 1;
+  except
+    Result := False;
+  end;
+  Result := True;
+end;
+
+function ParseCellColString(const AStr: string; var AResult: Integer): Boolean;
+const
+  INT_NUM_LETTERS = 26;
+begin
+  Result := False;
+  AResult := 0;
+
+  if Length(AStr) = 1 then AResult := Ord(AStr[1]) - Ord('A')
+  else if Length(AStr) = 2 then
+  begin
+    AResult := (Ord(AStr[1]) - Ord('A') + 1) * INT_NUM_LETTERS
+     + Ord(AStr[2]) - Ord('A');
+  end
+  else Exit(False);
+
+  Result := True;
+end;
+
 end.
 

components/fpspreadsheet/xlsbiff5.pas

@@ -1250,9 +1250,11 @@ begin
   try
     // Only one stream is necessary for any number of worksheets
     OLEDocument.Stream := MemStream;
-
     OLEStorage.ReadOLEFile(AFileName, OLEDocument);
 
+    // Check if the operation succeded
+    if MemStream.Size = 0 then raise Exception.Create('FPSpreadsheet: Reading the OLE document failed');
+
     // Rewind the stream and read from it
     MemStream.Position := 0;
     ReadFromStream(MemStream, AData);

components/fpspreadsheet/xlsbiff8.pas

@@ -1234,9 +1234,11 @@ begin
   try
     // Only one stream is necessary for any number of worksheets
     OLEDocument.Stream := MemStream;
-
     OLEStorage.ReadOLEFile(AFileName, OLEDocument,'Workbook');
 
+    // Check if the operation succeded
+    if MemStream.Size = 0 then raise Exception.Create('FPSpreadsheet: Reading the OLE document failed');
+
     // Rewind the stream and read from it
     MemStream.Position := 0;
     ReadFromStream(MemStream, AData);