Для Delphi 7 есть бесплатный компонент PageExtControl - смотри пририкрепленный файл.
Для 2010:
| Код |
type
TFormMain = class(TForm)
{...}
private
FCloseButtonsRect: array of TRect;
FCloseButtonMouseDownIndex: Integer;
FCloseButtonShowPushed: Boolean;
{...}
end;
{...}
procedure TFormMain.FormCreate(Sender: TObject);
var
I: Integer;
begin
PageControlCloseButton.TabWidth := 150;
PageControlCloseButton.OwnerDraw := True;
//should be done on every change of the page count
SetLength(FCloseButtonsRect, PageControlCloseButton.PageCount);
FCloseButtonMouseDownIndex := -1;
for I := 0 to Length(FCloseButtonsRect) - 1 do
begin
FCloseButtonsRect[I] := Rect(0, 0, 0, 0);
end;
end;
procedure TFormMain.PageControlCloseButtonDrawTab(Control: TCustomTabControl;
TabIndex: Integer; const Rect: TRect; Active: Boolean);
var
CloseBtnSize: Integer;
PageControl: TPageControl;
TabCaption: TPoint;
CloseBtnRect: TRect;
CloseBtnDrawState: Cardinal;
CloseBtnDrawDetails: TThemedElementDetails;
begin
PageControl := Control as TPageControl;
if InRange(TabIndex, 0, Length(FCloseButtonsRect) - 1) then
begin
CloseBtnSize := 14;
TabCaption.Y := Rect.Top + 3;
if Active then
begin
CloseBtnRect.Top := Rect.Top + 4;
CloseBtnRect.Right := Rect.Right - 5;
TabCaption.X := Rect.Left + 6;
end
else
begin
CloseBtnRect.Top := Rect.Top + 3;
CloseBtnRect.Right := Rect.Right - 5;
TabCaption.X := Rect.Left + 3;
end;
CloseBtnRect.Bottom := CloseBtnRect.Top + CloseBtnSize;
CloseBtnRect.Left := CloseBtnRect.Right - CloseBtnSize;
FCloseButtonsRect[TabIndex] := CloseBtnRect;
PageControl.Canvas.FillRect(Rect);
PageControl.Canvas.TextOut(TabCaption.X, TabCaption.Y, PageControl.Pages[TabIndex].Caption);
if not UseThemes then
begin
if (FCloseButtonMouseDownIndex = TabIndex) and FCloseButtonShowPushed then
CloseBtnDrawState := DFCS_CAPTIONCLOSE + DFCS_PUSHED
else
CloseBtnDrawState := DFCS_CAPTIONCLOSE;
Windows.DrawFrameControl(PageControl.Canvas.Handle,
FCloseButtonsRect[TabIndex], DFC_CAPTION, CloseBtnDrawState);
end
else
begin
Dec(FCloseButtonsRect[TabIndex].Left);
if (FCloseButtonMouseDownIndex = TabIndex) and FCloseButtonShowPushed then
CloseBtnDrawDetails := ThemeServices.GetElementDetails(twCloseButtonPushed)
else
CloseBtnDrawDetails := ThemeServices.GetElementDetails(twCloseButtonNormal);
ThemeServices.DrawElement(PageControl.Canvas.Handle, CloseBtnDrawDetails,
FCloseButtonsRect[TabIndex]);
end;
end;
end;
procedure TFormMain.PageControlCloseButtonMouseDown(Sender: TObject;
Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
I: Integer;
PageControl: TPageControl;
begin
PageControl := Sender as TPageControl;
if Button = mbLeft then
begin
for I := 0 to Length(FCloseButtonsRect) - 1 do
begin
if PtInRect(FCloseButtonsRect[I], Point(X, Y)) then
begin
FCloseButtonMouseDownIndex := I;
FCloseButtonShowPushed := True;
PageControl.Repaint;
end;
end;
end;
end;
procedure TFormMain.PageControlCloseButtonMouseMove(Sender: TObject;
Shift: TShiftState; X, Y: Integer);
var
PageControl: TPageControl;
Inside: Boolean;
begin
PageControl := Sender as TPageControl;
if (ssLeft in Shift) and (FCloseButtonMouseDownIndex >= 0) then
begin
Inside := PtInRect(FCloseButtonsRect[FCloseButtonMouseDownIndex], Point(X, Y));
if FCloseButtonShowPushed <> Inside then
begin
FCloseButtonShowPushed := Inside;
PageControl.Repaint;
end;
end;
end;
procedure TFormMain.PageControlCloseButtonMouseLeave(Sender: TObject);
var
PageControl: TPageControl;
begin
PageControl := Sender as TPageControl;
FCloseButtonShowPushed := False;
PageControl.Repaint;
end;
procedure TFormMain.PageControlCloseButtonMouseUp(Sender: TObject;
Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
PageControl: TPageControl;
begin
PageControl := Sender as TPageControl;
if (Button = mbLeft) and (FCloseButtonMouseDownIndex >= 0) then
begin
if PtInRect(FCloseButtonsRect[FCloseButtonMouseDownIndex], Point(X, Y)) then
begin
ShowMessage('Button ' + IntToStr(FCloseButtonMouseDownIndex + 1) + ' pressed!');
FCloseButtonMouseDownIndex := -1;
PageControl.Repaint;
end;
end;
end;
|
Чесно говоря работоспособность кода для 2010 не проверял. |
