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| author | Friedemann Kleint <Friedemann.Kleint@qt.io> | 2016-07-25 08:57:47 +0200 |
|---|---|---|
| committer | Friedemann Kleint <Friedemann.Kleint@qt.io> | 2016-07-26 05:57:14 +0000 |
| commit | 8ea6e8d525b9dd8703ebdd0938706bd9785858a4 (patch) | |
| tree | 2c5239c7b9280c717f589c75d2da35dd1664b5c5 /src/plugins | |
| parent | 1fcea117560fb528f6a4824b1eca930b322953f9 (diff) | |
QWindowsTheme::themeHint(): Handle special value of SPI_GETWHEELSCROLLLINES
When the mouse wheel step is set to "Scroll one screen", querying
SPI_GETWHEELSCROLLLINES returns the special value unsigned(-1). Return the
default instead of converting it to int in that case since Qt does not
implement it.
Task-number: QTBUG-52384
Change-Id: I793e5c09103fe0c7c4a378aba97e9f63ae1c2f35
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Diffstat (limited to 'src/plugins')
| -rw-r--r-- | src/plugins/platforms/windows/qwindowstheme.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/plugins/platforms/windows/qwindowstheme.cpp b/src/plugins/platforms/windows/qwindowstheme.cpp index ce0c69f9ed..40be4fa31f 100644 --- a/src/plugins/platforms/windows/qwindowstheme.cpp +++ b/src/plugins/platforms/windows/qwindowstheme.cpp @@ -401,8 +401,13 @@ QVariant QWindowsTheme::themeHint(ThemeHint hint) const return QVariant(booleanSystemParametersInfo(SPI_GETSNAPTODEFBUTTON, false)); case ContextMenuOnMouseRelease: return QVariant(true); - case WheelScrollLines: - return QVariant(int(dWordSystemParametersInfo(SPI_GETWHEELSCROLLLINES, 3))); + case WheelScrollLines: { + int result = 3; + const DWORD scrollLines = dWordSystemParametersInfo(SPI_GETWHEELSCROLLLINES, DWORD(result)); + if (scrollLines != DWORD(-1)) // Special value meaning "scroll one screen", unimplemented in Qt. + result = int(scrollLines); + return QVariant(result); + } default: break; } |