支持自绘画的属性编辑器

type
TBoldComponentNameProperty =
class(TComponentNameProperty)
public
procedure PropDrawName(Canvas: TCanvas;
const Rect: TRect; Selected: Boolean); override;
end;

procedure TBoldComponentNameProperty.PropDrawName(
Canvas: TCanvas; const Rect: TRect; Selected: Boolean);
var
Style: TFontStyles;
begin
Style := Canvas.Font.Style;
Canvas.Font.Style := Canvas.Font.Style [fsBold];
try
inherited;
finally

//恢复字体的样式以便Delphi正确的画属性值
Canvas.Font.Style := Style;
end;
end;

procedure ListDrawValue(const Value: string;
Canvas: TCanvas; const Rect: TRect; Selected: Boolean);
procedure ListMeasureHeight(const Value: string;
Canvas: TCanvas; var Height: Integer);
procedure ListMeasureWidth(const Value: string;
Canvas: TCanvas; var Width: Integer);

// 在下拉列表框的每一个列表项旁边画一个复选框
procedure TSetPropertyEx.ListDrawValue(const Value: string;
Canvas: TCanvas; const Rect: TRect; Selected: Boolean);
var
IsChecked: Boolean;
OrdValue: Integer;
begin
OrdValue := GetOrdValue;
IsChecked := GetEnumValue(EnumInfo, Value) in
TIntegerSet(OrdValue);
Canvas.FillRect(Rect);
Canvas.TextRect(Rect, Rect.Left Checked.Width 2,
Rect.Top 1, Value);
if IsChecked then
Canvas.Draw(Rect.Left 1, Rect.Top 1, Checked)
else
Canvas.Draw(Rect.Left 1, Rect.Top 1, Unchecked);
end;

procedure TSetPropertyEx.ListMeasureHeight(
const Value: string; Canvas: TCanvas;
var Height: Integer);
begin
if Height < Checked.Height then
Height := Checked.Height;
end;