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MG: added paint messages for some gtk internal widgets

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git-svn-id: trunk@1909 -
This commit is contained in:
lazarus 2002-08-17 23:40:01 +00:00
parent 6353cb60a0
commit d638df276b
1 changed files with 27 additions and 68 deletions
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95
lcl/interfaces/gtk/gtkwinapi.inc
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@ -3126,71 +3126,19 @@ end;
Params: none
Returns: Nothing
hWnd is any widget.
The DC will be created for the client area.
------------------------------------------------------------------------------}
function TgtkObject.GetDC(hWnd: HWND): HDC;
var
aDC: TDeviceContext;
ClientWidget: PGtkWidget;
GdiObject: PGdiObject;
Values: TGdkGCValues;
X,Y : Longint;
begin
Assert(False, Format('trace:> [TgtkObject.GetDC] hWND: 0x%x', [hWnd]));
aDC := nil;
aDC := NewDC;
aDC.hWnd := hWnd;
if hWnd = 0
then begin
FillChar(Values, SizeOf(Values), #0);
end
else begin
// create a new devicecontext for this window
ClientWidget := GetFixedWidget(Pointer(hWnd));
if ClientWidget = nil
then begin
Assert(False, 'trace:WARNING: [TgtkObject.GetDC] Widget has no fixed, using widget itself');
ClientWidget := Pointer(hWnd);
end;
aDC.SpecialOrigin:=GtkWidgetIsA(ClientWidget,GTK_LAYOUT_GET_TYPE);
aDC.Drawable := GetControlWindow(ClientWidget);
if aDC.Drawable = nil
then begin
Assert(False, 'Trace:[TgtkObject.GetDC] Force widget creation');
//force creation
gtk_widget_realize(ClientWidget);
aDC.Drawable := GetControlWindow(ClientWidget);
end;
aDC.GC := gdk_gc_new(aDC.Drawable);
gdk_window_get_size(aDC.Drawable, @X, @Y);
gdk_gc_set_function(aDC.GC, GDK_COPY);
gdk_gc_get_values(aDC.GC, @Values);
end;
if aDC <> nil
then begin
if Values.Font <> nil
then begin
GdiObject:=NewGDIObject(gdiFont);
GdiObject^.GDIFontObject := Values.Font;
gdk_font_ref(Values.Font);
end
else GdiObject := CreateDefaultFont;
aDC.CurrentFont := GdiObject;
aDC.CurrentBrush := CreateDefaultBrush;
aDC.CurrentPen := CreateDefaultPen;
end;
Result := HDC(aDC);
Assert(False, Format('trace:< [TgtkObject.GetDC] Got 0x%x', [Result]));
Result:=CreateDCForWidget(PGtkWidget(hWnd),nil);
end;
{------------------------------------------------------------------------------
function TgtkObject.GetDeviceCaps(DC: HDC; Index: Integer): Integer;
------------------------------------------------------------------------------}
function TgtkObject.GetDeviceCaps(DC: HDC; Index: Integer): Integer;
begin
Result := -1;
@ -5759,11 +5707,14 @@ begin
if Target<>nil then begin
if (Msg=LM_PAINT) or (Msg=LM_GtkPaint) then begin
// The LCL repaints controls in a top-down hierachy. But the gtk sends
// gtkdraw events bottom-up. So, controls at the bottom are repainted
// many times. To avoid this the queue is checked for LM_PAINT messages
// for the parent control. If there is a parent LM_PAINT, this message
// is ignored.
(* MG: old trick. Not used anymore, but it might be, that someday there
will be component, that works better with this, so it is kept.
The LCL repaints controls in a top-down hierachy. But the gtk sends
gtkdraw events bottom-up. So, controls at the bottom are repainted
many times. To avoid this the queue is checked for LM_PAINT messages
for the parent control. If there is a parent LM_PAINT, this message
is ignored.
{if (Target is TControl) then begin
ParentControl:=TControl(Target).Parent;
while ParentControl<>nil do begin
@ -5775,7 +5726,7 @@ begin
end;
ParentControl:=ParentControl.Parent;
end;
end;}
end;} *)
if Msg=LM_GtkPAINT then begin
// convert LM_GtkPAINT to LM_PAINT
AMessage.Msg := LM_PAINT;
@ -5786,9 +5737,14 @@ begin
// deliver it
Result := DeliverMessage(Target, AMessage);
// free DC
if AMessage.Msg=LM_PAINT then
if (AMessage.Msg=LM_PAINT) and (AMessage.WParam<>0) then begin
// free DC
ReleaseDC(0,AMessage.WParam);
if (csDesigning in TComponent(Target).ComponentState)
and (TObject(Target) is TWinControl) then
SendPaintMessagesForInternalWidgets(TWinControl(Target));
end;
end;
end;
@ -7243,6 +7199,9 @@ end;
{ =============================================================================
$Log$
Revision 1.153 2002/10/10 08:51:15 lazarus
MG: added paint messages for some gtk internal widgets
Revision 1.152 2002/10/09 20:08:41 lazarus
Cleanups