Do use TBSTYLE_FLAT and TBSTYLE_TRANSPARENT (the former actually implies the
latter) for MSW toolbar as it is the only way to avoid the flicker of toolbar
buttons. These styles were disabled before because of lack of understanding
about how they worked: with them, the toolbar supposes that its parent takes
care of erasing its background but wx didn't do this (in fact wxFrame did
accidentally erase toolbar background because of the use of Win32 client
rectangle, including tool/status bars, instead of wx client rectangle,
excluding them, in wxWindowMSW::DoEraseBackground(), but it didn't do it
correctly).
Now we allow hooking WM_ERASEBKGND events processing in a parent window by a
child one and use this to handle toolbar background erasing in toolbar itself.
We still prevent the native toolbar from drawing dummy separators and always
erase the area occupied by them ourselves and thus avoid the flicker entirely.
The only remaining flicker in the toolbar sample is that of embedded
wxStaticText control. It does appear with correctly transparent background and
bitmaps with alpha channel also (still) are drawn correctly in wxStaticBitmaps
embedded in the toolbar.
Finally, we still use solid background brush for toolbar but we can easily use
a themed background if really desired, there is just a single function to
change to do it (MSWGetToolbarBgBrush()).
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62971 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Prevent the native toolbar from drawing the separators which we use simply as
placeholders by excluding them from the update region when handling WM_PAINT.
This reduces flicker by not redrawing the areas occupied by these separators
twice and also prevents them from ever being shown (you could see them briefly
appear before being erased before).
The other toolbar tools still flicker though, there doesn't seem to be any
simple way to prevent the control from entirely invalidating itself whenever
it is resized.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62934 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Native toolbars don't have themed background under Vista/7 and don't look good
with rebar background (which is the same one as used for the menus) as
toolbars don't appear on the top of the window.
Erasing background ourselves also results in flicker and display problems and
makes the code much more complicated. Simply don't do this to avoid all the
problems.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62931 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Stretchable spaces consume all extra toolbar space not allocated to the fixed
size items. They can in particular be used to right-align (some) toolbar tools.
Add and document the new API, change the sample to show it and implement it
for MSW, GTK and OS X/Cocoa.
Also refactor MSW background erasing/repainting code to avoid duplicated calls
to DrawThemeBackground(), call it from a new helper MSWEraseRect() function.
Note that we may want to add support for "invisible" separators, IOW
non-stretchable spaces. This could be easily done for MSW after the changes in
this commit and is supported natively by GTK+ and Cocoa so implementing this
would be trivial if there is any interest.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62850 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
