设置PageControl的颜色
type
TTabSheet = class(ComCtrls.TTabSheet)
private
FColor: TColor;
procedure SetColor(Value: TColor);
procedure WMEraseBkGnd(var Msg: TWMEraseBkGnd);
message WM_ERASEBKGND;
public
constructor Create(aOwner: TComponent); override;
property Color: TColor read FColor write SetColor;
end;
{...}
implementation
{...}
constructor TTabSheet.Create(aOwner: TComponent);
begin
inherited;
FColor := clBtnFace;
end;
procedure TTabSheet.SetColor(Value: TColor);
begin
if FColor Value then
begin
FColor := Value;
Invalidate;
end;
end;
procedure TTabSheet.WMEraseBkGnd(var Msg: TWMEraseBkGnd);
begin
if FColor = clBtnFace then
inherited
else
begin
Brush.Color := FColor;
Windows.FillRect(Msg.dc, ClientRect, Brush.Handle);
Msg.Result := 1;
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Tabsheet1.Color := clWhite;
TabSheet2.Color := clLime;
end;
// PageControl1.OwnerDraw := true !
procedure TForm1.PageControl1DrawTab(Control: TCustomTabControl;
TabIndex: Integer; const Rect: TRect; Active: Boolean);
var
AText: string;
APoint: TPoint;
begin
with (Control as TPageControl).Canvas do
begin
Brush.Color := clred;
FillRect(Rect);
AText := TPageControl(Control).Pages[TabIndex].Caption;
with Control.Canvas do
begin
APoint.x := (Rect.Right - Rect.Left) div 2 - TextWidth(AText) div 2;
APoint.y := (Rect.Bottom - Rect.Top) div 2 - TextHeight(AText) div 2;
TextRect(Rect, Rect.Left + APoint.x, Rect.Top + APoint.y, AText);
end;
end;
end;
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