Now that we're not drawing the GdkWindows by themeselves we need to
propagate into children in the same order as the windows were painted
otherwise apps can't rely on stacking order to overlay children.
This is still not 100% the same as the old behaviour, because we're
treating all windows that are part of a window at the same time (to allow
e.g. opacity groups), and we're only looking at order for the main
windows of a widget. However, this fixes at least the ordering
of the gnome-boxes fullscreen overlay toolbar.
https://bugzilla.gnome.org/show_bug.cgi?id=699970
Instead of making clients inspect the submenu action and decide what
to do based upon that, always request the submenu open and let the
tracker decide what to do.
Add a new class, GtkMenuTrackerItem that represents a menu item, to be
used with GtkMenuTracker.
GtkMenuTracker's insert callback now works in terms of this new type
(instead of passing reference to the model and an index to the item).
GtkMenuShell now handles all of the binding tasks internally, mostly
through the use of property bindings. Having bindings for the label and
visibility attributes, in partiular, will help with supporting upcoming
extensions to GMenuModel.
GtkModelMenu has been reduced to a helper class that has nothing to do
with GMenuModel. It represents something closer to an "ideal" API for
GtkMenuItem if we didn't have compatibility concerns (eg: not emitting
"activate" when setting toggle state, no separate subclasses per menu
item type, supporting icons, etc.) Improvements to GtkMenuItem could
eventually shrink the size of this class or remove the need for it
entirely.
Some GtkActionHelper functionality has been duplicated in
GtkMenuTracker, which is suboptimal. The duplication exists so that
other codebases (such as Unity and gnome-shell) can reuse the
GtkMenuTracker code, whereas GtkActionHelper is very much tied to
GtkWidget. Supporting binding arbitrary GtkWidgets to actions vs.
supporting the full range of GMenuModel features for menu items turns
out to be two overlapping but not entirely similar problems. Some of
the duplication (such as roles) can be removed from GtkActionHelper once
Gtk's internal Mac OS menubar support is ported to GtkMenuTracker.
The intent to reuse the code outside of Gtk is also the reason for the
unusual treatment of the enum type introduced in this comment.
This adds no new "public" API to the Gtk library, other than types that
we cannot make private due to GType limitations.
Rename our internal GActionMuxer, GActionObserver and GActionObservable
classes and interfaces to have names in our own namespace.
These classes were originally intended for GIO but turned out to be too
special-purpose to be useful there, so we never made them public API but
have just been copying them around (without bothering to properly rename
them). Now that other people will be copying them out of Gtk, it's even
more important to prevent this namespace abuse from spreading further.
We were using gtk_menu_item_get_label() from a testcase to determine the
label associated with a menu item. Future changes to GtkModelMenuItem
will cause this to stop working, so try a bit harder to find a label
inside of the item.
GtkApplicationWindow would only update its list of captured accels
when realizing the window. This meant that keyboard shortcuts added
after the window was realised (for example, added by plugins) would
be non-functional.
Solve this by updating our accels every time the accel map changes,
not only when realizing the window.
https://bugzilla.gnome.org/show_bug.cgi?id=700079
Items that act on the selection should not be sensitive if the
selection is empty. This was already the case for the 'Copy file
location' item, but not for the 'Add bookmark' and 'Visit file'
items.
https://bugzilla.gnome.org/show_bug.cgi?id=699104
Usually, educated GtkContainers' forall() implementation returns children
in an order that's safe for the default draw() implementation in GtkContainer.
So for widgets with some stacking notions (eg. GtkOverlay),
_gtk_widget_find_at_coords() needs to recurse within containers in reverse
order so it finds the topmost widget.
As this function is used in both tooltips and DnD code, this improves behavior
of "floating" widgets wrt those two. This could for example be seen in the
"Transparent" GTK+ demo, where dropping text on the entry results on the text
going to the textview.
https://bugzilla.gnome.org/show_bug.cgi?id=699239
Also removed a bogus FIXME comment which might have been true
a long time ago. Clarification: the "domain" attribute specified
in the builder script overrides any domain previously set with
gtk_builder_set_translation_domain(), so the translation of items
here is perfectly correct and does not need to be fixed.
Bring back need_default_size. We need it to preserve this
documented behavior:
The default size of a window only affects the first time a window is
shown; if a window is hidden and re-shown, it will remember the size
it had prior to hiding, rather than using the default size.
With this patch, all of the window sizing tests in
gtk/tests/window pass again.
gtk_widget_preferred_size() is only useful if you want to quickly port a
widget from GTK2 sizing code to GTK3 but does not properly work with
height-for-width as used in GTK. So we don't want to encourage people to
use it. In particular we want people to convert to height-for-width
before adding baseline support to their widgets.
GtkMenu calls gtk_widget_size_allocate on its GtkWindow during
gtk_menu_popup_for_device if the menu has not been realised. This can cause the
allocation of the GtkWindow and the size of the GdkWindow to become out of sync
because a top level GtkWindow does not attempt to re-size the GdkWindow when
its allocation is set.
https://bugzilla.gnome.org/show_bug.cgi?id=695120
We should only draw the cross-fade on the bin window, not doing this
was causing us to draw it multiple times using ADD which resulted
in weird colors.
This makes iterating over the children a lot faster, as we're
not doing lots of intra-library calls and type checks. We're still
in some sence O(n^2) since we iterate over each child window for each
widget, but the profiles look much better.
We register an invalidate handler on the bin window to get told
of child widget invalidations, although we manually need to discard
invalidates from the scroll operation.
Additionally we invalidate all of the pixel cache whenever
the TreeView itself is queue_draw()n to handle e.g. style (bg)
changes, or changes due to model changes causing queue_draw() in
the tree view.
Since gdk_window_move() no longer uses XCopyArea all scrolling
now re-renders everything in the window. To get performance
back we use a GtkPixelCache to store already drawn children,
and we when we expose the viewport we just blit the
offscreen to the right place.
GtkPixelCache is a helper utility that lets you implement
faster scrolling of a viewport of a canvas by using an
offscreen pixmap cache.
You call _gtk_pixel_cache_draw with a callback function that
does the drawing, and additionally you specify the size and the
position of the viewport in the widget, and the position and size
of the canvas wrt the viewport. The callback will be called to
draw on an offscreen surface, and the surface will be drawn
on the window. The next time you do the same, any already drawn
pieces of the surface are re-used from the offscreen and need
not be rendered again.
If things inside the canvas change you need to call
_gtk_pixel_cache_invalidate to tell the cache about this.
Some other details:
* The offscreen surface is generally a bit larger than
the viewport, so scrolling a small amount can often
be done without redrawing children.
* If the canvas is not larger than the viewport no
offscreen surface is used.
GtkPixelCache: Make sure we always copy using SOURCE
We were using OVER for the first copy (from source to group surface.
GtkPixelCache: Fix x/y typos
GtkPixelCache: Allow NULL for invalidate region
gtkpixelcache: Use CONTENT_COLOR for solid bg windows
Since widgets now cache drawn state we allow them to override
queue_draw_region to detect when some region of the widget
should be redrawn. For instance, if a widget draws the
background color in a pixel cache we will need to invalidate
that when the style context changes which queues a repaint.
We do the save/restore when emitting ::draw rather than in a custom
marshaller, as this saves an extra stack frame, which is helpfull now
that we do painting fully recursive. This is also likely to save a few
cycles.
We now consider non-native windows non-opaque, which means any invalid
area in a subwindow will also be invalid all the way up to the nearest
native windows. We take advantage of this by ignoring all expose events
on non-native windows (which typically means just the toplevel) and instead
propagating down the draw() calls to children directly via
gtk_container_propagate_draw.
This is nice as it means we always draw widgets the same way, and it
will let us do some interesting ways in the future.
We also clean up the GtkWidget opacity handling as we can now always
rely on the draing happening via cairo.
We can't really just draw by walking down the widget hierarchy, as
this doesn't get the clipping right (so e.g. widgets doing cairo_paint
may draw outside the expected gdkwindow subarea) nor does it let
us paint window backgrounds.
So, we now do multiple draws for each widget, once for each GdkWindow,
although we still do it on the same base cairo_t that we get for the
toplevel native window. The difference is only the clipping, the rendering
order, and which other widgets we propagate into.
We also collect all the windows of a widget so we can expose them inside
the same opacity group if needed.
NOTE: This change neuters gtk_widget_set_double_buffered for
widgets without native windows. Its impossible to disable
the double buffering in this model.
