This patch adds the GtkScrollablePolicy type property to GtkScrollable
and implements it in all subclasses. GtkScrolledWindow observes this
property to make a good guess about when to show/hide scrollbars for
height-for-width content.
Most scrollable children do not do height-for-width *yet* but
most certainly will (toolpalette, treeview, iconview, textview
widgets all TODO), for scrollable widgets that do have a minimum
and natural size, it's important for them to observe the state
of this property in order to properly drive the scroll adjustments
according to the desired GtkScrollablePolicy. This patch makes
GtkViewport do this.
Patch also adds tests/testscrolledwindow.c to display the effects
of this property.
The scrollable patch removed set_scroll_adjustments (NULL, NULL) from
gtk_tree_view_init() which ensured the treeview would have adjustments
at all times, this patch adds set_v/hadjustment (NULL) to _init to ensure
the same thing (without it, there are crashes when trying to access the
adjustments notably from set_headers_visible() in gedit).
I.e. Since we are now calling get_preferred_width() to ensure a good 'for_size'
for get_height_for_width() we need to avoid warning about this internal expected
recursion.
These properties use GdkRGBA to render the cell renderer's content.
Note that Pango attributes are used to render the foreground color,
so the alpha value is currently ignored.
It is just too annoying to have to implement these properties in
every scrollable. Instead, we now have ::min-content-height/width
in GtkScrolledWindow.
We also add GtkScrollablePolicy to determine how to size the
scrollable content.
Since the ::changed implementation of GtkRecentManager implies a
synchronous write operation, when we receive multiple requests to emit a
::changed signal we might end up blocking.
This change coalesces multiple ::changed emission requests using the
following sequence:
• the first request will install a timeout in 250 ms, which will
emit the ::changed signal
• each further request while the timeout has not been emitted
will increase a counter
‣ if the counter reaches 250 before the timeout has been
emitted, then the RecentManager will remove the timeout
source and force a signal emission and reset the counter
This sequence should guarantee that frequent ::changed emission requests
are coalesced, and also guarantee that we don't let them dangle for too
long.
https://bugzilla.gnome.org/show_bug.cgi?id=616997
alignment/margin vfuncs adjust_size_request/allocation
Now get_height_for_width() will internally update the for_width
before passing it to the real height_for_width() vfunc, allowing
margins and extra space for alignments to be stripped, thus requesting
sufficient height for greater than natural widths (and also accounting
for margins properly). Test case adjusted in testadjustsize to ensure
proper behavior.
Create a new adjustment if there was *no* adjustment passed in, not
the other way around. Also remove unused function
gtk_tool_palette_set_adjustment().
