DarkStyle.h

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#ifndef DARKSTYLE_H
#define DARKSTYLE_H
 
#include "MyCommonStyle.h"
 
#include <QCommonStyle>
 
class QStyleOptionViewItem;
 
class ButtonImages {
public:
    QImage im_normal;
    QImage im_pressed;
};
 
class DarkStyle : public MyCommonStyle<QCommonStyle> {
    using Base = MyCommonStyle<QCommonStyle>;
private:
    struct Private;
    Private *m;
 
    enum class Theme {
        Light,
        Gray,
        Dark,
    };
    Theme theme() const;
 
    struct ScrollBarTextures {
        QImage page_bg;
        ButtonImages sub_line;
        ButtonImages add_line;
        ButtonImages slider;
    };
 
    QImage colorizeImage(QImage image);
    QImage loadColorizedImage(QString const &path, QString const &role = QString());
    ButtonImages generateButtonImages(QString const &path);
    QImage generateHoverImage(const QImage &source);
    QPixmap pixmapFromImage(QImage const &image, QSize size) const;
    void loadImages();
 
    QColor selectionColor() const
    {
        return QColor(80, 160, 255);
    }
    std::pair<QColor, QColor> menuBorderColors(Theme theme) const;
 
    void drawNinePatchImage(QPainter *p, QImage const &image, QRect const &r, int w, int h) const;
    void drawGutter(QPainter *p, QRect const &r) const;
    void drawSelectedItemFrame(QPainter *p, QRect rect, bool focus) const;
    void drawFocusFrame(QPainter *p, const QRect &rect, int margin) const;
    void drawButton(QPainter *p, QStyleOption const *option, bool mac_margin = true) const;
    void drawToolButton(QPainter *p, QStyleOption const *option) const;
    void drawMenuBarBG(QPainter *p, const QStyleOption *option, const QWidget *widget) const;
    QColor color(int level, int alpha = 255) const;
    void drawItemViewText(QPainter *p, const QStyleOptionViewItem *option, const QRect &rect, bool abbreviation) const;
    QRect indicatorRect(const QStyleOption *option, const QWidget *widget, const QRect &rect) const;
    qreal dpiScaled(qreal value, qreal dpi) const;
    qreal dpiScaled(qreal value, const QPaintDevice *device) const;
    qreal dpiScaled(qreal value, const QStyleOption *option) const;
public:
    DarkStyle(QColor base_color = QColor());
    ~DarkStyle() override;
 
    bool isDpiScalingEnabled() const;
 
    QColor baseColor() const;
    void setBaseColor(const QColor &color);
    void setScrollBarExtent(int n);
    void setDpiScalingEnabled(bool f);
 
    QPalette standardPalette() const override;
    QSize sizeFromContents(ContentsType type, const QStyleOption *option, const QSize &size, const QWidget *widget) const override;
    void polish(QPalette &palette) override;
    int pixelMetric(PixelMetric metric, const QStyleOption *option = nullptr, const QWidget *widget = nullptr) const override;
    QRect subControlRect(ComplexControl cc, const QStyleOptionComplex *option, SubControl sc, const QWidget *widget) const override;
    int styleHint(StyleHint stylehint, const QStyleOption *option = nullptr, const QWidget *widget = nullptr, QStyleHintReturn *returnData = nullptr) const override;
    void drawItemText(QPainter *painter, const QRect &rect, int flags, const QPalette &pal, bool enabled, const QString &text, QPalette::ColorRole textRole = QPalette::NoRole) const override;
    void drawPrimitive(PrimitiveElement element, const QStyleOption *option, QPainter *painter, const QWidget *widget) const override;
    void drawControl(ControlElement ce, const QStyleOption *option, QPainter *p, const QWidget *widget) const override;
    void drawComplexControl(ComplexControl cc, const QStyleOptionComplex *option, QPainter *p, const QWidget *widget) const override;
 
};
 
#endif // DARKSTYLE_H