Title: rearrange the tabs in a TPageControl using drag 'n drop ?
// In the PageControl's OnMouseDown event handler:
procedure TForm1.PageControl1MouseDown(Sender: TObject;
Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
PageControl1.BeginDrag(False);
end;
// In the PageControl's OnDragDrop event handler:
procedure TForm1.PageControl1DragDrop(Sender, Source: TObject; X, Y: Integer);
const
TCM_GETITEMRECT = $130A;
var
i: Integer;
r: TRect;
begin
if not (Sender is TPageControl) then Exit;
with PageControl1 do
begin
for i := 0 to PageCount - 1 do
begin
Perform(TCM_GETITEMRECT, i, lParam(@r));
if PtInRect(r, Point(X, Y)) then
begin
if i ActivePage.PageIndex then
ActivePage.PageIndex := i;
Exit;
end;
end;
end;
end;
// In the PageControl's OnDragOver event handler:
procedure TForm1.PageControl1DragOver(Sender, Source: TObject; X,
Y: Integer; State: TDragState; var Accept: Boolean);
begin
if Sender is TPageControl then
Accept := True;
end;