Hi ..
I have an application with a number of windows, each with a drawing area, and
pixmap associated with it.
At start-up all of the windows are created, but NOT displayed - various buttons
display these as required.
Now I need to write to one of the drawing areas BEFORE the window has ever been
displayed, and had a configure_event.
If I try to "draw" to the drawing area I get things like:
Gdk-CRITICAL **: file gdkdraw.c: line 89 (gdk_draw_rectangle): assertion `drawable !=
NULL' failed.
If I expose the drawing area (giving it a configure_event) PRIOR to attempting
to draw to it, everything is okay.
My configure events for the drawing area looks like:
//////////////////////////////////////////////////
gboolean
on_guiFastHenryVertViaDrawingArea_configure_event
(GtkWidget *widget,
GdkEventConfigure *event,
gpointer user_data)
{
if (guiGlobalVariablesFastHenryVertViaDrawingAreaPixMap == NULL ) {
guiGlobalVariablesFastHenryVertViaDrawingAreaPixMap = gdk_pixmap_new(
widget->window,
( (widget->allocation.width)
),
(
(widget->allocation.height) ),
-1
);
gdk_draw_rectangle (guiGlobalVariablesFastHenryVertViaDrawingAreaPixMap,
widget->style->black_gc,
TRUE,
0, 0,
( (widget->allocation.width) ),
( (widget->allocation.height) )
);
}
return FALSE;
}
//////////////////////////////////////////////////
My understanding is the the configure_event is fired either when the window is CREATED
or resized.
Without "reveiling" the window, how can I "fake" a window creation, and get the window
set up ready to
be drawn to ?
Fingered-crossed on a potential workaround ;-)
Best regards
/colin.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| Colin Thomas.
| Design Consultant.
|
| Email : [EMAIL PROTECTED]
| Tele : (44) 1234 240562
| Fax : (44) 1234 241262
|
| Address : Design Resources,
| Old Cock Inn,
| Silver End,
| Olney,
| Buckinghamshire,
| United Kingdom.
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