Simplifies the drawing code a bit.
Public API removed:
GnomeCanvas.center_scroll_region (is always TRUE)
GnomeCanvas.pixels_per_unit (is always 1.0)
gnome_canvas_set_center_scroll_region()
gnome_canvas_get_center_scroll_region()
gnome_canvas_set_pixels_per_unit()
Yes, the GtkScrollable interface is implemented by more than just
GtkLayout, but it turns out GtkLayout is the only thing Evolution
uses the GtkScrollable API for on the gtk3 branch.
The accessibility code for ECellText is unmaintained and crashes
constantly. I'm evicting it from our code base until someone takes
ownership of the libgal accessibility support and deals with it.
Passing a random GtkWidget and then searching its ancestors for an
EAlertSink turned out to be not as useful as I thought. Most of the
time we know about and have access to the widget that implements
EAlertSink, so just pass it directly as an EAlertSink.
Restore the update() method in ECanvasBackground. Without a redraw
request the draw() method is never called. For some reason this isn't
noticeable on gtk+-3.0 -- ETable and ETree backgrounds are still white
-- but on gtk+-2.0 the backgrounds are grey.
- "color" and "color-gdk" properties aren't readable (Their values would
be wrong if an alpha channel was set).
- Use the rgba color when rendering
- Don't allocate the color in the colormap anymore.
Way easier than to try to get the coordinates right.
Includes refactoring to introduce e_map_world_to_render_surface() that
computes coordinates on the background surface to make this stuff
easier.
The in_view() check is broken because it doesn't repaint points that are
1px outside the window. The point take 2 extra pixels in every direction
after all. And gtk_widget_queue_draw_area() will automatically discard
out-of-range rects anyway.
