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lazarus/components/tachart/demo/combobox/main.pas
wp 53007bd715 TAChart: Usability improvement of colorboxes in combodemo. 
git-svn-id: trunk@54126 -
2017-02-08 21:21:05 +00:00

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unit main;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, TAGraph, TAChartListbox, TAChartCombos, TASeries,
TASources, TATools, Forms, Controls, Graphics, Dialogs, ExtCtrls, StdCtrls,
ColorBox, Spin, Types;
type
{ TForm1 }
TForm1 = class(TForm)
Bevel2: TBevel;
CbAreaSerBrushColor: TColorBox;
CbAreaSerBrushStyle: TChartComboBox;
CbAreaSerContourColor: TColorBox;
CbAreaSerLinesColor: TColorBox;
CbAreaSerLinesStyle: TChartComboBox;
CbAreaSerLinesWidth: TChartComboBox;
CbBarSerPenStyle: TChartComboBox;
CbAreaSerContourStyle: TChartComboBox;
CbBarSerPenWidth: TChartComboBox;
CbBarSerPenColor: TColorBox;
CbAreaSerContourWidth: TChartComboBox;
CbLineSerPointerBorderColor: TColorBox;
CbLineSerPointerBrushColor: TColorBox;
CbBarSerBrushColor: TColorBox;
CbShowLines: TCheckBox;
Chart1: TChart;
CbLineSerLinePenStyle: TChartComboBox;
CbLineSerLinePenWidth: TChartComboBox;
CbLineSerPointerStyle: TChartComboBox;
Chart1AreaSeries1: TAreaSeries;
Chart1BarSeries1: TBarSeries;
Chart1LineSeries1: TLineSeries;
CbBarSerBrushStyle: TChartComboBox;
ChartListbox1: TChartListbox;
CbShow: TCheckBox;
CbLineSerLinePenColor: TColorBox;
ChartToolset1: TChartToolset;
ChartToolset1DataPointClickTool1: TDataPointClickTool;
CbShowPoints: TCheckBox;
GbAreaSerBrush: TGroupBox;
GbAreaSerContour: TGroupBox;
GbAreaSerLines: TGroupBox;
GbLineSerLines: TGroupBox;
GbBarSerPen: TGroupBox;
GbLineSerPointer: TGroupBox;
GbBarSerBrush: TGroupBox;
Label1: TLabel;
Label10: TLabel;
Label11: TLabel;
Label12: TLabel;
Label13: TLabel;
Label14: TLabel;
Label15: TLabel;
Label16: TLabel;
Label17: TLabel;
Label18: TLabel;
Label19: TLabel;
Label2: TLabel;
Label20: TLabel;
Label21: TLabel;
Label3: TLabel;
Label4: TLabel;
Label5: TLabel;
Label6: TLabel;
Label7: TLabel;
Label8: TLabel;
Label9: TLabel;
LblSeries: TLabel;
Notebook1: TNotebook;
Page1: TPage;
Page2: TPage;
Page3: TPage;
Panel1: TPanel;
RandomChartSource1: TRandomChartSource;
RandomChartSource2: TRandomChartSource;
RandomChartSource3: TRandomChartSource;
EdLineSerPointerSize: TSpinEdit;
Splitter1: TSplitter;
procedure AreaBrushChange(Sender: TObject);
procedure AreaContourChange(Sender: TObject);
procedure AreaLinesChange(Sender: TObject);
procedure BarBrushChange(Sender: TObject);
procedure BarPenChange(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure LinePenChange(Sender: TObject);
procedure LinePointerChange(Sender: TObject);
procedure CbShowChange(Sender: TObject);
procedure ChartListbox1Click(Sender: TObject);
procedure ChartToolset1DataPointClickTool1PointClick(ATool: TChartTool;
APoint: TPoint);
procedure FormShow(Sender: TObject);
private
FLockChanges: Integer;
public
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
uses
FPCanvas, TAChartUtils, TACustomSeries;
{ TAreaSeries }
procedure TForm1.AreaBrushChange(Sender: TObject);
var
ser: TAreaSeries;
begin
if FLockChanges > 0 then
exit;
ser := ChartListbox1.Series[ChartListbox1.ItemIndex] as TAreaSeries;
ser.AreaBrush.Color := CbAreaSerBrushColor.Selected;
ser.AreaBrush.Style := CbAreaserBrushStyle.BrushStyle;
if CbAreaSerBrushStyle.BrushStyle in [bsImage, bsPattern] then
// Must be AFTER assigning brush style because that sets Brush.Bitmap to nil
ser.AreaBrush.Bitmap := CbAreaSerBrushStyle.BrushBitmap;
end;
procedure TForm1.AreaContourChange(Sender: TObject);
var
ser: TAreaSeries;
begin
if FLockChanges > 0 then
exit;
ser := ChartListbox1.Series[ChartListbox1.ItemIndex] as TAreaSeries;
ser.AreaContourPen.Color := CbAreaSerContourColor.Selected;
ser.AreaContourPen.Width := CbAreaSerContourWidth.PenWidth;
ser.AreaContourPen.Style := CbAreaSerContourStyle.PenStyle;
if ser.AreaContourPen.Style = psPattern then
CbAreaSerContourStyle.SetPenPattern(ser.AreaContourPen);
end;
procedure TForm1.AreaLinesChange(Sender: TObject);
var
ser: TAreaSeries;
begin
if FLockChanges > 0 then
exit;
ser := ChartListbox1.Series[ChartListbox1.ItemIndex] as TAreaSeries;
ser.AreaLinesPen.Color := CbAreaSerLinesColor.Selected;
ser := ChartListbox1.Series[ChartListbox1.ItemIndex] as TAreaSeries;
ser.AreaLinesPen.Width := CbAreaSerLinesWidth.PenWidth;
ser.AreaLinesPen.Style := CbAreaSerLinesStyle.PenStyle;
if ser.AreaLinesPen.Style = psPattern then
CbAreaSerLinesStyle.SetPenPattern(ser.AreaLinesPen);
end;
{ TBarSeries }
procedure TForm1.BarBrushChange(Sender: TObject);
var
ser: TbarSeries;
begin
if FLockChanges > 0 then
exit;
ser := ChartListbox1.Series[ChartListbox1.ItemIndex] as TBarSeries;
ser.BarBrush.Color := CbBarSerBrushColor.Selected;
ser.BarBrush.Style := CbBarSerBrushStyle.BrushStyle;
if CbBarSerBrushStyle.BrushStyle in [bsImage, bsPattern] then
// Must be AFTER assigning brush style
ser.BarBrush.Bitmap := CbBarSerBrushStyle.BrushBitmap;
end;
procedure TForm1.BarPenChange(Sender: TObject);
var
ser: TBarSeries;
begin
if FLockChanges > 0 then
exit;
ser := ChartListbox1.Series[ChartListbox1.ItemIndex] as TBarSeries;
ser.BarPen.Color := CbBarSerPenColor.Selected;
ser.BarPen.Width := CbBarSerPenWidth.PenWidth;
ser.BarPen.Style := CbBarSerPenStyle.PenStyle;
if ser.BarPen.Style = psPattern then
CbBarSerPenStyle.SetPenPattern(ser.BarPen);
end;
{ Line series }
procedure TForm1.LinePenChange(Sender: TObject);
var
ser: TLineSeries;
begin
if FLockChanges > 0 then
exit;
ser := ChartListbox1.Series[ChartListbox1.ItemIndex] as TLineSeries;
ser.LinePen.Color := CbLineSerLinePenColor.Selected;
ser.LinePen.Width := CbLineSerLinePenWidth.PenWidth;
ser.LinePen.Style := CbLineSerLinePenStyle.PenStyle;
if ser.LinePen.Style = psPattern then
CbLineSerLinePenStyle.SetPenPattern(ser.LinePen);
ser.ShowLines := cbShowLines.Checked;
end;
procedure TForm1.LinePointerChange(Sender: TObject);
var
ser: TLineSeries;
begin
if FLockChanges > 0 then
exit;
ser := ChartListbox1.Series[ChartListbox1.ItemIndex] as TLineSeries;
ser.Pointer.Pen.Color := CbLineSerPointerBorderColor.Selected;
ser.Pointer.Brush.Color := CbLineSerPointerBrushColor.Selected;
ser.Pointer.Style := CbLineSerPointerStyle.PointerStyle;
ser.Pointer.HorizSize := EdLineSerPointerSize.Value;
ser.Pointer.VertSize := EdLineSerPointerSize.Value;
ser.ShowPoints := CbShowPoints.Checked;
end;
{ Other events }
procedure TForm1.CbShowChange(Sender: TObject);
var
ser: TCustomChartSeries;
begin
ser := ChartListbox1.Series[ChartListbox1.ItemIndex];
ser.Active := CbShow.Checked;
end;
procedure TForm1.ChartListbox1Click(Sender: TObject);
var
ser: TCustomChartSeries;
begin
ser := ChartListbox1.Series[ChartListbox1.ItemIndex];
if ser is TLineSeries then begin
Notebook1.PageIndex := 0;
CbShowLines.Checked := TLineSeries(ser).ShowLines;
CbLineSerLinePenStyle.SetPenPattern(TLineSeries(ser).LinePen);
CbLineSerLinePenStyle.Cosmetic := TLineSeries(ser).LinePen.Cosmetic;
CbLineSerLinePenStyle.PenStyle := TLineSeries(ser).LinePen.Style;
CbLineSerLinePenWidth.PenWidth := TLineSeries(ser).LinePen.Width;
CbLineSerLinePenColor.Selected := TLineSeries(ser).LinePen.Color;
inc(FLockChanges);
CbShowPoints.Checked := TLineSeries(ser).ShowPoints;
EdLineSerPointerSize.Value := TLineSeries(ser).Pointer.HorizSize;
CbLineSerPointerStyle.PointerStyle := TLineSeries(ser).Pointer.Style;
CbLineSerPointerBorderColor.Selected := TLineSeries(ser).Pointer.Pen.Color;
CblineSerPointerBrushColor.Selected := TLineSeries(ser).Pointer.Brush.Color;
dec(FLockChanges); // Not clear why this is necessary - should work without it
// LinePointerChange(nil);
end
else
if ser is TBarSeries then begin
Notebook1.PageIndex := 1;
CbBarSerPenStyle.PenStyle := TBarSeries(ser).BarPen.Style;
CbBarSerPenWidth.PenWidth := TBarseries(ser).BarPen.Width;
CbBarSerPenColor.Selected := TBarSeries(ser).BarPen.Color;
CbBarSerBrushColor.Selected := TBarSeries(ser).BarBrush.Color;
CbBarSerBrushStyle.BrushStyle := TBarSeries(ser).BarBrush.Style;
end
else if ser is TAreaSeries then begin
Notebook1.PageIndex := 2;
CbAreaSerBrushColor.Selected := TAreaSeries(ser).AreaBrush.Color;
CbAreaSerBrushStyle.BrushStyle := TAreaSeries(ser).AreaBrush.Style;
CbAreaSerContourStyle.PenStyle := TAreaSeries(ser).AreaContourPen.Style;
CbAreaSerContourWidth.PenWidth := TAreaSeries(ser).AreaContourPen.Width;
CbAreaSerContourColor.Selected := TAreaSeries(ser).AreaContourPen.Color;
CbAreaSerLinesStyle.PenStyle := TAreaSeries(ser).AreaLinesPen.Style;
CbAreaSerLinesWidth.PenWidth := TAreaSeries(ser).AreaLinesPen.Width;
CbAreaSerLinesColor.Selected := TAreaSeries(ser).AreaLinesPen.Color;
end;
LblSeries.Caption := ser.Title;
CbShow.Checked := ser.Active;
end;
procedure TForm1.ChartToolset1DataPointClickTool1PointClick(ATool: TChartTool;
APoint: TPoint);
var
ser: TChartSeries;
begin
Unused(APoint);
ser := TChartSeries(TDataPointClickTool(ATool).Series);
if ser <> nil then begin
ChartListbox1.ItemIndex := ChartListbox1.FindSeriesIndex(ser);
ChartListbox1Click(nil);
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
var
i: Integer;
begin
for i:=0 to ComponentCount - 1 do
if Components[i] is TCustomCombobox then
TCustomCombobox(Components[i]).DropDownCount := DEFAULT_DROPDOWN_COUNT;
end;
procedure TForm1.FormShow(Sender: TObject);
const
DEFAULT_PATTERN = '2|1|1|1|1|1|1|1';
var
bmp: TBitmap;
begin
// Prepare the application's icon as a brush fill picture
bmp := TBitmap.Create;
try
bmp.SetSize(Application.Icon.Width, Application.Icon.Height);
bmp.Canvas.FillRect(0, 0, bmp.Width, bmp.Height);
bmp.Transparent := true;
bmp.canvas.Draw(0, 0, Application.Icon);
CbBarSerBrushStyle.BrushBitmap.Assign(bmp);
CbAreaSerBrushStyle.BrushBitmap.Assign(bmp);
finally
bmp.Free;
end;
{
bmp := TBitmap.Create;
try
bmp.SetSize(2, 2);
bmp.Canvas.Pixels[0, 0] := clWhite;
bmp.Canvas.Pixels[1, 0] := clBlack;
bmp.Canvas.Pixels[0, 1] := clBlack;
bmp.Canvas.Pixels[1, 1] := clWhite;
finally
CbBarSerBrushStyle.BrushBitmap.Assign(bmp);
CbAreaserBrushStyle.BrushBitmap.Assign(bmp);
end;
}
// Prepare user-defined line pattern
CbLineSerLinePenStyle.PenPattern := DEFAULT_PATTERN;
CbBarSerPenStyle.PenPattern := DEFAULT_PATTERN;
CbAreaSerLinesStyle.PenPattern := DEFAULT_PATTERN;
CbAreaSerContourStyle.PenPattern := DEFAULT_PATTERN;
ChartListbox1.ItemIndex := 0;
ChartListbox1Click(nil);
end;
end.
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