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tvplanit: More refactoring of NavBar painting
git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@4990 8e941d3f-bd1b-0410-a28a-d453659cc2b4
This commit is contained in:
wp_xxyyzz
@ -247,8 +247,8 @@ object Form1: TForm1
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object Images: TImageList
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Height = 32
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Width = 32
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left = 168
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top = 240
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left = 424
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top = 40
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Bitmap = {
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4C690A0000002000000020000000FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
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FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
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@ -46,7 +46,6 @@ type
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nabTopItem: Integer;
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FFolderArea: TRect;
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bkMode: Integer;
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procedure DrawBackground(Canvas: TCanvas; R: TRect);
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@ -57,6 +56,14 @@ type
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function DrawStandardTab(Canvas: TCanvas; R: TRect; ATabIndex: Integer;
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ATabColor: TColor): TRect;
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procedure DrawItemHighlight(Canvas: TCanvas; R: TRect; Enable: Boolean);
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function DrawItemText(Canvas: TCanvas; AItem: TVpNavBtnItem; CurPos: Integer;
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AText: String; AtLargeIcon: Boolean; out AWidth: Integer): Boolean;
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function DrawLargeIcon(Canvas: TCanvas; AItem: TVpNavBtnItem;
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CurPos: Integer): Boolean;
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function DrawSmallIcon(Canvas: TCanvas; AItem: TVpNavBtnItem;
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CurPos: Integer): Boolean;
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function IsFocused(ATabIndex: Integer): Boolean;
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function IsMouseOverFolder(ATabIndex: Integer): Boolean;
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function IsMouseOverItem(ATabIndex: Integer): Boolean;
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@ -79,7 +86,7 @@ function GetLargeIconDisplayName(Canvas: TCanvas; Rect: TRect; const Name: strin
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implementation
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uses
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Themes,
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Math, Themes,
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VpMisc;
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type
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@ -127,12 +134,8 @@ var
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item: TVpNavBtnItem;
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J: Integer;
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text: String;
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W, H, X: Integer;
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H, X: Integer;
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R: TRect;
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Buf: array[0..255] of Char;
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labelWidth: Integer;
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lOffset: Integer;
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bmp: TBitmap;
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begin
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folder := FNavBar.Folders[FActiveFolder];
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@ -168,144 +171,26 @@ begin
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else
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text := item.Caption;
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{ Large icons }
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if folder.IconSize = isLarge then begin
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if Assigned(FImages) then begin
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W := FImages.Width + 2;
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H := FImages.Height + 2;
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end else begin
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W := 32;
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H := 32;
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end;
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{ glyph is at the top }
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{ If an image list is assigned then use the image size.
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If no image list is assinged then assume a 32 x 32 image size. }
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R.Top := CurPos;
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R.Bottom := CurPos + H;
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R.Left := (FNavBar.ClientWidth - W) div 2;
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R.Right := R.Left + W;
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if R.Top > nabItemsRect^.Bottom then
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break;
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{ Large icons }
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if not DrawLargeIcon(Canvas, item, CurPos) then
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Continue;
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{make the icon's bottom blend into the label's top}
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R := item.IconRect;
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inc(R.Bottom, 4);
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item.IconRect := R;
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if FShowButtons then begin
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if FActiveItem = J then begin
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if nabMouseDown then
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Canvas.Pen.Color := clBlack
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else
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Canvas.Pen.Color := clWhite;
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Canvas.MoveTo(R.Left-1, R.Bottom+1);
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Canvas.LineTo(R.Left-1, R.Top-1);
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Canvas.LineTo(R.Right+1, R.Top-1);
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if nabMouseDown then
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Canvas.Pen.Color := clWhite
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else
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Canvas.Pen.Color := clBlack;
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Canvas.LineTo(R.Right+1, R.Bottom+1);
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Canvas.LineTo(R.Left-1, R.Bottom+1);
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end else begin
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Canvas.Pen.Color := FBackgroundColor;
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Canvas.Brush.Color := FBackgroundColor;
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end;
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if Assigned(FImages) and (item.IconIndex >= 0) and (item.IconIndex < FImages.Count) then
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FImages.Draw(Canvas, R.Left + 2, R.Top + 2, item.IconIndex);
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{make the icon's bottom blend into the label's top}
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R := item.IconRect;
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inc(R.Bottom, 4);
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item.IconRect := R;
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end;
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Inc(CurPos, H + 4);
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CurPos := item.IconRect.Bottom;
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{now, draw the text}
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R.Top := CurPos;
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R.Bottom := CurPos + FButtonHeight div 2 - 7;
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R.Left := 0;
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R.Right := FNavBar.ClientWidth - 1;
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item.LabelRect := R;
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item.DisplayName := GetLargeIconDisplayName(Canvas, R, text);
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X := Canvas.TextWidth(item.DisplayName);
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R.Left := (FNavBar.ClientWidth - X) div 2;
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if R.Left < 5 then
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R.Left := 5;
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R.Right := R.Left + X;
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if R.Right > FnavBar.ClientWidth - 5 then
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R.Right := FNavBar.ClientWidth - 5;
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item.LabelRect := R;
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if R.Top > nabItemsRect^.Bottom then
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Break;
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StrPLCopy(Buf, item.DisplayName, 255);
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DrawText(Canvas.Handle, Buf, Length(item.DisplayName), R,
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DT_CENTER or DT_VCENTER or DT_WORDBREAK or DT_CALCRECT);
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labelWidth := WidthOf(R);
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R.Left := (FNavBar.ClientWidth - labelWidth) div 2;
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R.Right := R.Left + labelWidth + 1;
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item.LabelRect := R;
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bkMode := SetBkMode(Canvas.Handle, TRANSPARENT);
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X := DrawText(Canvas.Handle, Buf, Length(item.DisplayName), R, DT_CENTER or DT_VCENTER or DT_WORDBREAK);
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inc(CurPos, X);
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SetBkMode(Canvas.Handle, bkMode);
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Inc(CurPos, FItemSpacing);
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end
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else
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{ Small Icons }
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if not DrawItemText(Canvas, item, CurPos, text, true, X) then
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Continue;
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Inc(CurPos, FItemSpacing + X);
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end else
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begin
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W := 16;
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H := 16;
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{glyph is at the left}
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R.Top := CurPos;
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lOffset := abs(Canvas.Font.Height) div 2;
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if lOffset > 8 then
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R.Top := R.Top + lOffset - 8;
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R.Bottom := R.Top + H;
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R.Left := 8;
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R.Right := R.Left + W;
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item.IconRect := R;
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if R.Top > nabItemsRect^.Bottom then
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Break;
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if FShowButtons then begin
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if FActiveItem = J then begin
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if nabMouseDown then
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Canvas.Pen.Color := clBlack
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else
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Canvas.Pen.Color := clWhite;
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Canvas.MoveTo(R.Left-1, R.Bottom+1);
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Canvas.LineTo(R.Left-1, R.Top-1);
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Canvas.LineTo(R.Right+1, R.Top-1);
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if nabMouseDown then
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Canvas.Pen.Color := clWhite
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else
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Canvas.Pen.Color := clBlack;
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Canvas.LineTo(R.Right+1, R.Bottom+1);
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Canvas.LineTo(R.Left-1, R.Bottom+1);
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Canvas.Brush.Color := FBackgroundColor;
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end else begin
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Canvas.Pen.Color := FBackgroundColor;
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Canvas.Brush.Color := FBackgroundColor;
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Canvas.Rectangle(R.Left - 1, R.Top - 1, R.Right + 1, R.Bottom + 1);
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end;
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if Assigned(FImages) then begin
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bmp := TBitmap.Create;
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try
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bmp.Width := FImages.Width;
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bmp.Height := FImages.Height;
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FImages.Draw(bmp.Canvas, 0, 0, item.IconIndex);
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Canvas.BrushCopy(item.IconRect, bmp, Rect(0, 0, bmp.Width, bmp.Height), bmp.Canvas.Pixels[0, bmp.Height-1]);
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//TODO: DrawBmp.Canvas.BrushCopy(Item.FIconRect, BM,
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// Rect(0, 0, BM.Width, BM.Height), BM.Canvas.Pixels[0,
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// BM.Height-1]);
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finally
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bmp.Free;
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end;
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end;
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end;
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{ Small Icons }
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if not DrawSmallIcon(Canvas, item, CurPos) then
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Continue;
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{make the icon's right blend into the label's left}
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R := item.IconRect;
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@ -313,29 +198,12 @@ begin
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item.IconRect := R;
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{now, draw the text}
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R.Top := CurPos;
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R.Bottom := CurPos + FButtonHeight div 2 - 7;
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R.Left := item.IconRect.Right;
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X := FNavBar.ClientWidth - R.Left - 7;
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R.Right := R.Left + X;
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item.LabelRect := R;
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if R.Top > nabItemsRect^.Bottom then
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Break;
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R := item.LabelRect;
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item.DisplayName := GetDisplayString(Canvas, Text, 1, WidthOf(R));
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StrPLCopy(Buf, item.DisplayName, 255);
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DrawText(Canvas.Handle, Buf, Length(item.DisplayName), R, DT_LEFT or DT_VCENTER or DT_CALCRECT);
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labelWidth := WidthOf(R);
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R.Right := R.Left + labelWidth + 1;
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item.LabelRect := R;
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X := DrawText(Canvas.Handle, Buf, Length(item.DisplayName), R, DT_LEFT or DT_VCENTER);
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if X < H then X := H;
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if not DrawItemText(Canvas, item, CurPos, text, false, X) then
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Continue;
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Inc(CurPos, FItemSpacing + X);
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end; { Small icons }
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end; { if folder.IconSize ... }
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end; { for J }
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end; { if folder.FolderType = ftDefault }
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end; { if folder.FolderType = ftDefault ... }
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end;
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procedure TVpNavBarPainter.DrawBackground(Canvas: TCanvas; R: TRect);
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@ -548,6 +416,175 @@ begin
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Result := R;
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end;
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procedure TVpNavBarPainter.DrawItemHighlight(Canvas: TCanvas; R: TRect;
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Enable: Boolean);
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begin
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if Enable then begin
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if nabMouseDown then
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Canvas.Pen.Color := clBlack
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else
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Canvas.Pen.Color := clWhite;
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Canvas.MoveTo(R.Left-1, R.Bottom+1);
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Canvas.LineTo(R.Left-1, R.Top-1);
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Canvas.LineTo(R.Right+1, R.Top-1);
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if nabMouseDown then
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Canvas.Pen.Color := clWhite
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else
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Canvas.Pen.Color := clBlack;
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Canvas.LineTo(R.Right+1, R.Bottom+1);
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Canvas.LineTo(R.Left-1, R.Bottom+1);
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Canvas.Brush.Color := FBackgroundColor;
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end else begin
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Canvas.Pen.Color := FBackgroundColor;
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Canvas.Brush.Color := FBackgroundColor;
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Canvas.Rectangle(R.Left - 1, R.Top - 1, R.Right + 1, R.Bottom + 1);
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end;
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end;
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function TVpNavBarPainter.DrawItemText(Canvas: TCanvas; AItem: TVpNavBtnItem;
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CurPos: Integer; AText: String; AtLargeIcon: Boolean; out AWidth: Integer): Boolean;
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var
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R: TRect;
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s: String;
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txtWidth: Integer;
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bkMode: Integer;
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begin
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Result := false;
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if AtLargeIcon then
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begin
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R.Top := CurPos;
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R.Bottom := CurPos + FButtonHeight div 2 - 7;
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R.Left := 0;
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R.Right := FNavBar.ClientWidth - 1;
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AItem.LabelRect := R;
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AItem.DisplayName := GetLargeIconDisplayName(Canvas, R, AText);
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AWidth := Canvas.TextWidth(AItem.DisplayName);
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R.Left := Max(5, (FNavBar.ClientWidth - AWidth) div 2);
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R.Right := Min(R.Left + AWidth, FNavBar.ClientWidth - 5);
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AItem.LabelRect := R;
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if R.Top > nabItemsRect^.Bottom then
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Exit;
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s := AItem.DisplayName;
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DrawText(Canvas.Handle, PChar(s), Length(s), R, DT_CENTER or DT_VCENTER or DT_WORDBREAK or DT_CALCRECT);
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txtWidth := WidthOf(R);
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R.Left := (FNavBar.ClientWidth - txtWidth) div 2;
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R.Right := R.Left + txtWidth + 1;
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AItem.LabelRect := R;
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bkMode := SetBkMode(Canvas.Handle, TRANSPARENT);
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AWidth := DrawText(Canvas.Handle, PChar(s), Length(s), R, DT_CENTER or DT_VCENTER or DT_WORDBREAK);
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SetBkMode(Canvas.Handle, bkMode);
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end else
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begin
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R.Top := CurPos;
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R.Bottom := CurPos + FButtonHeight div 2 - 7;
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R.Left := AItem.IconRect.Right;
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R.Right := R.Left + FNavBar.ClientWidth - R.Left - 7;
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AItem.LabelRect := R;
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if R.Top > nabItemsRect^.Bottom then
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Exit;
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R := AItem.LabelRect;
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s := GetDisplayString(Canvas, AText, 1, WidthOf(R));
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AItem.DisplayName := s;
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DrawText(Canvas.Handle, PChar(s), Length(s), R, DT_LEFT or DT_VCENTER or DT_CALCRECT);
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txtWidth := WidthOf(R);
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R.Right := R.Left + txtWidth + 1;
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AItem.LabelRect := R;
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bkMode := SetBkMode(Canvas.Handle, TRANSPARENT);
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AWidth := DrawText(Canvas.Handle, PChar(s), Length(s), R, DT_LEFT or DT_VCENTER);
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SetBkMode(Canvas.Handle, bkMode);
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if AWidth < 16 then AWidth := 16; // This it the width of the small icons
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end;
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Result := true;
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end;
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{ Draw a large icon: centered horizontally, text to be drawn underneath icon. }
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function TVpNavBarPainter.DrawLargeIcon(Canvas: TCanvas; AItem: TVpNavBtnItem;
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CurPos: Integer): Boolean;
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var
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W, H: Integer;
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lOffset: Integer;
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R: TRect;
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begin
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Result := false;
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{ If an image list is assigned then use the image size.
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If no image list is assinged then assume a 32 x 32 image size. }
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if Assigned(FImages) then begin
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W := FImages.Width + 2;
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H := FImages.Height + 2;
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end else begin
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W := 32;
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H := 32;
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end;
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R.Top := CurPos;
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R.Bottom := CurPos + H;
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R.Left := (FNavBar.ClientWidth - W) div 2;
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R.Right := R.Left + W;
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if R.Top > nabItemsRect^.Bottom then
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exit;
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AItem.IconRect := R;
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if FShowButtons then begin
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DrawItemHighlight(Canvas, R, FActiveItem = AItem.Index);
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if Assigned(FImages) and (AItem.IconIndex >= 0) and (AItem.IconIndex < FImages.Count) then
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FImages.Draw(Canvas, R.Left + 2, R.Top + 2, AItem.IconIndex);
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end;
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Result := true;
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end;
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{ Draw a small icon (16x16) }
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function TVpNavBarPainter.DrawSmallIcon(Canvas: TCanvas; AItem: TVpNavBtnItem;
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CurPos: Integer): Boolean;
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const
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W = 16;
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H = 16;
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var
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lOffset: Integer;
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bmp: TBitmap;
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R: TRect;
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begin
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Result := false;
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{glyph is at the left}
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R.Top := CurPos;
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lOffset := abs(Canvas.Font.Height) div 2;
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if lOffset > 8 then
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R.Top := R.Top + lOffset - 8;
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R.Bottom := R.Top + H;
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R.Left := 8;
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R.Right := R.Left + W;
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AItem.IconRect := R;
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if R.Top > nabItemsRect^.Bottom then
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Exit; // Returns false
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if FShowButtons then begin
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DrawItemHighlight(Canvas, R, FActiveItem = AItem.Index);
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if Assigned(FImages) then begin
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bmp := TBitmap.Create;
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try
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bmp.Width := FImages.Width;
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bmp.Height := FImages.Height;
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FImages.Draw(bmp.Canvas, 0, 0, AItem.IconIndex);
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Canvas.BrushCopy(AItem.IconRect, bmp, Rect(0, 0, bmp.Width, bmp.Height), bmp.Canvas.Pixels[0, bmp.Height-1]);
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finally
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bmp.Free;
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end;
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end;
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end;
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Result := true;
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end;
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{ Draw a "standard" tab button.
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Returns the usable text area inside the tab rect.}
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function TVpNavBarPainter.DrawStandardTab(Canvas: TCanvas; R: TRect;
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Reference in New Issue
Block a user