qwindowstheme.h

Go to the documentation of this file.

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QWINDOWSTHEME_H
#define QWINDOWSTHEME_H
 
#include <qpa/qplatformtheme.h>
 
#include <QtCore/qsharedpointer.h>
#include <QtCore/qvariant.h>
#include <QtCore/qlist.h>
#include <QtCore/qsize.h>
 
QT_BEGIN_NAMESPACE
 
class QWindow;
 
class QWindowsTheme : public QPlatformTheme
{
    Q_DISABLE_COPY_MOVE(QWindowsTheme)
public:
    QWindowsTheme();
    ~QWindowsTheme() override;
 
    static QWindowsTheme *instance() { return m_instance; }
 
    bool usePlatformNativeDialog(DialogType type) const override;
    QPlatformDialogHelper *createPlatformDialogHelper(DialogType type) const override;
#if QT_CONFIG(systemtrayicon)
    QPlatformSystemTrayIcon *createPlatformSystemTrayIcon() const override;
#endif
    QVariant themeHint(ThemeHint) const override;
 
    Qt::ColorScheme colorScheme() const override;
    void requestColorScheme(Qt::ColorScheme scheme) override;
    Qt::ContrastPreference contrastPreference() const override;
 
    static void handleThemeChange();
 
    const QPalette *palette(Palette type = SystemPalette) const override
        { return m_palettes[type]; }
    const QFont *font(Font type = SystemFont) const override
        { return m_fonts[type]; }
 
    QPixmap standardPixmap(StandardPixmap sp, const QSizeF &size) const override;
 
    QIcon fileIcon(const QFileInfo &fileInfo, QPlatformTheme::IconOptions iconOptions = {}) const override;
    QIconEngine *createIconEngine(const QString &iconName) const override;
 
    void displayChanged() { refreshIconPixmapSizes(); }
 
    QList<QSize> availableFileIconSizes() const { return m_fileIconSizes; }
 
    QPlatformMenuItem *createPlatformMenuItem() const override;
    QPlatformMenu *createPlatformMenu() const override;
    QPlatformMenuBar *createPlatformMenuBar() const override;
    void showPlatformMenuBar() override;
 
    static bool useNativeMenus();
 
    void refreshFonts();
    void refresh();
 
    static const char *name;
 
    static QPalette systemPalette(Qt::ColorScheme);
    static bool queryHighContrast();
private:
    void clearPalettes();
    void refreshPalettes();
    void clearFonts();
    void refreshIconPixmapSizes();
 
    static void populateLightSystemBasePalette(QPalette &result);
    static void populateDarkSystemBasePalette(QPalette &result);
 
    static Qt::ColorScheme queryColorScheme();
    static Qt::ColorScheme effectiveColorScheme();
 
    static QWindowsTheme *m_instance;
    static inline Qt::ColorScheme s_colorScheme = Qt::ColorScheme::Unknown;
    static inline Qt::ColorScheme s_colorSchemeOverride = Qt::ColorScheme::Unknown;
 
    friend class QWindowsContext;
 
    QPalette *m_palettes[NPalettes];
    QFont *m_fonts[NFonts];
    QList<QSize> m_fileIconSizes;
 
    HWND m_themeChangeObserver = nullptr;
    void destroyThemeChangeWindow();
};
 
QT_END_NAMESPACE
 
#endif // QWINDOWSTHEME_H