diff options
Diffstat (limited to 'src/plugins/platforms/windows/qwindowstheme.cpp')
| -rw-r--r-- | src/plugins/platforms/windows/qwindowstheme.cpp | 56 |
1 files changed, 45 insertions, 11 deletions
diff --git a/src/plugins/platforms/windows/qwindowstheme.cpp b/src/plugins/platforms/windows/qwindowstheme.cpp index 887a217b06..ef652e6f98 100644 --- a/src/plugins/platforms/windows/qwindowstheme.cpp +++ b/src/plugins/platforms/windows/qwindowstheme.cpp @@ -122,6 +122,41 @@ static inline QColor getSysColor(int index) return COLORREFToQColor(GetSysColor(index)); } +#ifndef QT_NO_WINCE_SHELLSDK +// QTBUG-48823/Windows 10: SHGetFileInfo() (as called by item views on file system +// models has been observed to trigger a WM_PAINT on the mainwindow. Suppress the +// behavior by running it in a thread. +class ShGetFileInfoFunction +{ +public: + explicit ShGetFileInfoFunction(const wchar_t *fn, DWORD a, SHFILEINFO *i, UINT f, bool *r) : + m_fileName(fn), m_attributes(a), m_flags(f), m_info(i), m_result(r) {} + + void operator()() const { *m_result = SHGetFileInfo(m_fileName, m_attributes, m_info, sizeof(SHFILEINFO), m_flags); } + +private: + const wchar_t *m_fileName; + const DWORD m_attributes; + const UINT m_flags; + SHFILEINFO *const m_info; + bool *m_result; +}; + +static bool shGetFileInfoBackground(QWindowsThreadPoolRunner &r, + const wchar_t *fileName, DWORD attributes, + SHFILEINFO *info, UINT flags, + unsigned long timeOutMSecs = 5000) +{ + bool result = false; + if (!r.run(ShGetFileInfoFunction(fileName, attributes, info, flags, &result), timeOutMSecs)) { + qWarning().noquote() << "ShGetFileInfoBackground() timed out for " + << QString::fromWCharArray(fileName); + return false; + } + return result; +} +#endif // !QT_NO_WINCE_SHELLSDK + // from QStyle::standardPalette static inline QPalette standardPalette() { @@ -690,23 +725,22 @@ QPixmap QWindowsTheme::fileIconPixmap(const QFileInfo &fileInfo, const QSizeF &s } SHFILEINFO info; - unsigned int flags = + const unsigned int flags = #ifndef Q_OS_WINCE SHGFI_ICON|iconSize|SHGFI_SYSICONINDEX|SHGFI_ADDOVERLAYS|SHGFI_OVERLAYINDEX; #else iconSize|SHGFI_SYSICONINDEX; #endif // Q_OS_WINCE - unsigned long val = 0; + + #if !defined(QT_NO_WINCE_SHELLSDK) - if (cacheableDirIcon && useDefaultFolderIcon) { - flags |= SHGFI_USEFILEATTRIBUTES; - val = SHGetFileInfo(L"dummy", - FILE_ATTRIBUTE_DIRECTORY, - &info, sizeof(SHFILEINFO), flags); - } else { - val = SHGetFileInfo(reinterpret_cast<const wchar_t *>(filePath.utf16()), 0, - &info, sizeof(SHFILEINFO), flags); - } + const bool val = cacheableDirIcon && useDefaultFolderIcon + ? shGetFileInfoBackground(m_threadPoolRunner, L"dummy", FILE_ATTRIBUTE_DIRECTORY, + &info, flags | SHGFI_USEFILEATTRIBUTES) + : shGetFileInfoBackground(m_threadPoolRunner, reinterpret_cast<const wchar_t *>(filePath.utf16()), 0, + &info, flags); +#else + const bool val = false; #endif // !QT_NO_WINCE_SHELLSDK // Even if GetFileInfo returns a valid result, hIcon can be empty in some cases |