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Extend wxBannerWindow background bitmap if necessary.

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Ensure that the entire banner window uses the same background colour as the
bitmap, even when the bitmap is too small for the window size. This allows to
avoid using huge bitmaps if extending the bitmap with solid colour looks good
enough.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69859 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2011-11-28 18:58:52 +00:00
parent e78e77e5ca
commit 4e2b91bb27
3 changed files with 113 additions and 17 deletions
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20
interface/wx/bannerwindow.h
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@@ -113,14 +113,20 @@ public:
/**
Provide the bitmap to use as background.
Notice that the bitmap should be big enough to always cover the entire
banner, e.g. for a horizontal banner with wxTOP style its width should
be bigger than any reasonable window size.
Notice that ideally the bitmap should be big enough to always cover the
entire banner, e.g. for a horizontal banner with wxTOP style its width
should be bigger than any reasonable window size. Otherwise the bitmap
is extended to cover the entire window area with a solid colour taken
from the bitmap pixel on the edge in which direction the extension
occurs so all bitmap pixels on this edge (top for wxLEFT, right for
wxTOP and wxBOTTOM and bottom for wxRIGHT) should have the same colour
to avoid jarring discontinuity.
For wxLEFT orientation the bitmap is truncated from the top, for wxTOP
and wxBOTTOM -- from the right and for wxRIGHT -- from the bottom, so
put the most important part of the bitmap information in the opposite
direction.
If, on the other hand, the bitmap is bigger than the window size, then
it is truncated. For wxLEFT orientation the bitmap is truncated from
the top, for wxTOP and wxBOTTOM -- from the right and for wxRIGHT --
from the bottom, so put the most important part of the bitmap
information in the opposite direction where it will never be truncated.
If no valid background bitmap is specified, the banner draws gradient
background but if a valid bitmap is given here, the gradient is not