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Deal with themes not implementing GetThemeBackgroundContentRect()

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Some custom themes apparently don't implement this function at all and
just return failure error code from it, but our code either assumed that
it never failed (when handling WM_NCPAINT) or didn't handle its failure
correctly (when handle WM_NCCALCSIZE the client rect wasn't returned at
all to the system in this case).

Fix this by just falling back to the initial rectangle in case of
failure.
This commit is contained in:
Vadim Zeitlin
2019-01-16 01:52:37 +01:00
parent d47dbe9faa
commit 712e3652ff
1 changed files with 32 additions and 12 deletions
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28
src/msw/window.cpp
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@@ -3740,8 +3740,14 @@ wxWindowMSW::MSWHandleMessage(WXLRESULT *result,
EP_EDITTEXT,
IsEnabled() ? ETS_NORMAL : ETS_DISABLED,
rect,
&rcClient) == S_OK )
&rcClient) != S_OK )
{
// If GetThemeBackgroundContentRect() failed, as can
// happen with at least some custom themes, just use
// the original client rectangle.
rcClient = *rect;
}
InflateRect(&rcClient, -1, -1);
if (wParam)
csparam->rgrc[0] = rcClient;
@@ -3753,7 +3759,6 @@ wxWindowMSW::MSWHandleMessage(WXLRESULT *result,
// rc.result = WVR_REDRAW;
}
}
}
break;
case WM_NCPAINT:
@@ -3776,8 +3781,23 @@ wxWindowMSW::MSWHandleMessage(WXLRESULT *result,
RECT rcClient;
const int nState = IsEnabled() ? ETS_NORMAL : ETS_DISABLED;
::GetThemeBackgroundContentRect(
hTheme, GetHdcOf(*impl), EP_EDITTEXT, nState, &rcBorder, &rcClient);
if ( ::GetThemeBackgroundContentRect
(
hTheme,
GetHdcOf(*impl),
EP_EDITTEXT,
nState,
&rcBorder,
&rcClient
) != S_OK )
{
// As above in WM_NCCALCSIZE, fall back on something
// reasonable for themes which don't implement this
// function.
rcClient = rcBorder;
}
InflateRect(&rcClient, -1, -1);
::ExcludeClipRect(GetHdcOf(*impl), rcClient.left, rcClient.top,