theme_lua_code_preview.h

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#ifndef THEME_LUA_CODE_PREVIEW_H
#define THEME_LUA_CODE_PREVIEW_H
 
#include <ui/qt/utils/theme_manager.h>
#include <ui/qt/widgets/theme_preview_pick.h>
 
#include <QColor>
#include <QFont>
#include <QHash>
#include <QImage>
#include <QList>
#include <QWidget>
 
#include <memory>
 
class LuaSyntaxHighlighter;
class QAction;
class QContextMenuEvent;
class QMenu;
class QMouseEvent;
class QPaintEvent;
class QTextDocument;

class ThemeLuaCodePreview : public QWidget
{
    Q_OBJECT
public:
    explicit ThemeLuaCodePreview(QWidget *parent = nullptr);
    ~ThemeLuaCodePreview();

    void setPreviewColors(const QHash<ThemeManager::ThemeToken, QColor> &colors);

    void setPreviewFont(const QFont &monospace);

    ThemePreviewPicker &picker() { return picker_; }
 
signals:
    void layerPicked(const ThemePreviewPick::Layer &layer);

    void pickMenuRequested(QMenu *menu, QAction *before,
                           const QList<ThemePreviewPick::Layer> &layers);

    void childDialogClosed();
 
protected:
    void paintEvent(QPaintEvent *event) override;
    void contextMenuEvent(QContextMenuEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
    void mousePressEvent(QMouseEvent *event) override;
    QSize minimumSizeHint() const override;
 
private:
    QColor c(ThemeManager::ThemeToken token, const QColor &fallback = QColor()) const;

    QFont resolvedFont() const;

    int gutterWidth(const QFont &font) const;

    QImage renderPickImage();

    int pickTextHeight() const;
 
    QTextDocument *document_;
    LuaSyntaxHighlighter *highlighter_;
    QHash<ThemeManager::ThemeToken, QColor> colors_;
    QFont preview_font_;
    bool  has_preview_font_ = false;

    std::unique_ptr<ThemeLuaCodePreview> pick_probe_;

    ThemePreviewPicker picker_;
};
 
#endif // THEME_LUA_CODE_PREVIEW_H