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unit TASeriesPropEditors;
{$H+}
interface
procedure Register;
implementation
uses
Graphics, Classes, Math, PropEdits, SysUtils, LCLIntf, typinfo,
TATypes, TADrawerCanvas, TACustomSeries, TASeries, TALegend,
TAGraph, TAChartCombos;
type
TAxisIndexPropertyEditor = class(TOrdinalPropertyEditor)
public
function GetAttributes: TPropertyAttributes; override;
function OrdValueToVisualValue(AOrdValue: Longint): String; override;
procedure GetValues(AProc: TGetStrProc); override;
procedure SetValue(const ANewValue: String); override;
end;
TSeriesPointerStylePropertyEditor = class(TEnumPropertyEditor)
private
procedure DrawPointer(ACanvas: TCanvas; ARect: TRect;
AStyle: TSeriesPointerStyle; APenColor, ABrushColor: TColor);
public
function GetAttributes: TPropertyAttributes; override;
procedure ListMeasureWidth(const {%H-}CurValue: ansistring; {%H-}AIndex:integer;
{%H-}ACanvas: TCanvas; var AWidth: Integer); override;
procedure ListDrawValue(const CurValue: ansistring; {%H-}AIndex:integer;
ACanvas: TCanvas; const ARect: TRect; AState: TPropEditDrawState); override;
procedure PropDrawValue(ACanvas: TCanvas; const ARect: TRect;
AState:TPropEditDrawState); override;
end;
procedure Register;
begin
RegisterPropertyEditor(
TypeInfo(TChartAxisIndex), TCustomChartSeries, '', TAxisIndexPropertyEditor);
RegisterPropertyEditor(
TypeInfo(TSeriesPointerStyle), TSeriesPointer, '', TSeriesPointerStylePropertyEditor);
RegisterPropertyEditor(
TypeInfo(TSeriesPointerStyle), TChartComboBox, '', TSeriespointerStylePropertyEditor);
end;
{ TAxisIndexPropertyEditor }
function TAxisIndexPropertyEditor.GetAttributes: TPropertyAttributes;
begin
Result := [paMultiSelect, paValueList, paRevertable];
end;
procedure TAxisIndexPropertyEditor.GetValues(AProc: TGetStrProc);
var
s: TCustomChartSeries;
ch: TChart;
i: Integer;
begin
s := GetComponent(0) as TCustomChartSeries;
ch := s.ParentChart;
AProc('-1 None');
if ch <> nil then
for i := 0 to ch.AxisList.Count - 1 do
AProc(IntToStr(i) + ' ' + ch.AxisList[i].DisplayName);
end;
function TAxisIndexPropertyEditor.OrdValueToVisualValue(
AOrdValue: Longint): String;
var
s: TCustomChartSeries;
ch: TChart;
begin
s := GetComponent(0) as TCustomChartSeries;
ch := s.ParentChart;
Result := IntToStr(AOrdValue) + ' ';
if Assigned(ch) and InRange(AOrdValue, 0, ch.AxisList.Count - 1) then
Result += ch.AxisList[AOrdValue].DisplayName
else
Result += 'None';
end;
procedure TAxisIndexPropertyEditor.SetValue(const ANewValue: String);
var
v: Integer;
code: Word;
begin
Val(ANewValue, v, code);
if code > 0 then
Val(Copy(ANewValue, 1, code - 1), v, code);
SetOrdValue(Max(v, Low(TChartAxisIndex)));
end;
{ TSeriesPointerStylePropertyEditor }
procedure TSeriesPointerStylePropertyEditor.DrawPointer(ACanvas: TCanvas;
ARect: TRect; AStyle: TSeriesPointerStyle; APenColor, ABrushColor: TColor);
var
pointer: TSeriesPointer;
c: TPoint;
begin
pointer := TSeriesPointer.Create(nil);
try
pointer.Style := AStyle;
Pointer.HorizSize := (ARect.Right - ARect.Left) div 2 - 1;
Pointer.VertSize := (ARect.Bottom - ARect.Top) div 2 - 1;
Pointer.Brush.Color := ABrushColor;
Pointer.Pen.Color := APenColor;
c := Point((ARect.Left + ARect.Right) div 2, (ARect.Top + ARect.Bottom) div 2);
pointer.Draw(TCanvasDrawer.Create(ACanvas), c, ABrushColor);
finally
pointer.Free;
end;
end;
function TSeriesPointerStylePropertyEditor.GetAttributes: TPropertyAttributes;
begin
Result := (inherited GetAttributes) + [paCustomDrawn];
end;
procedure TSeriesPointerStylePropertyEditor.ListMeasureWidth(
const CurValue: ansistring; AIndex:integer; ACanvas: TCanvas;
var AWidth: Integer);
begin
AWidth := 130;
end;
procedure TSeriesPointerStylePropertyEditor.ListDrawValue(const CurValue: ansistring;
AIndex:integer; ACanvas: TCanvas; const ARect: TRect; AState: TPropEditDrawState);
const
MARGIN = 2;
var
lRect: TRect;
oldPenColor, oldBrushColor: TColor;
oldPenStyle: TPenStyle;
i: Integer;
begin
lRect := ARect;
lRect.Right := lRect.Left + (lRect.Bottom - lRect.Top); // * 3 div 2;
InflateRect(lRect, -MARGIN, -MARGIN);
with ACanvas do
try
// save off things
oldPenColor := Pen.Color;
oldBrushColor := Brush.Color;
oldPenStyle := Pen.Style;
try
{
// white out the background
Brush.Color := clWindow;
FillRect(ARect);
}
// set things up and do work
i := GetEnumValue(GetPropInfo^.PropType, CurValue);
DrawPointer(ACanvas, lRect, TSeriesPointerStyle(i), clWindowText, clWindowText);
finally
// restore the things we twiddled with
Brush.Color := oldBrushColor;
Pen.Style := oldPenStyle;
Pen.Color := oldPenColor;
end;
finally
lRect := Rect(lRect.Right + 2*MARGIN, ARect.Top, ARect.Right, ARect.Bottom);
inherited ListDrawValue(CurValue, -1, ACanvas, lRect, AState);
end;
end;
procedure TSeriesPointerStylePropertyEditor.PropDrawValue(ACanvas: TCanvas;
const ARect: TRect; AState:TPropEditDrawState);
begin
if GetVisualValue <> '' then
ListDrawValue(GetVisualValue, -1, ACanvas, ARect, [pedsInEdit])
else
inherited PropDrawValue(ACanvas, ARect, AState);
end;
end.
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