FileDiffSliderWidget.h

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#ifndef FILEDIFFSLIDERWIDGET_H
#define FILEDIFFSLIDERWIDGET_H
 
#include "AbstractCharacterBasedApplication.h"
#include "Theme.h"
#include <QPixmap>
#include <QWidget>
#include <functional>
 
using TextDiffLine = Document::Line;
using TextDiffLineList = std::vector<Document::Line>;
 
enum class DiffPane {
    Left,
    Right,
};
 
using fn_pixmap_maker_t = std::function<QPixmap (DiffPane, int, int)>;
 
class FileDiffSliderWidget : public QWidget {
    Q_OBJECT
private:
    struct Private;
    Private *m;
 
    void scroll_(int pos);
    QPixmap makeDiffPixmap(DiffPane pane, int width, int height);
    void setValue(int v);
    void internalSetValue(int v);
public:
    explicit FileDiffSliderWidget(QWidget *parent = nullptr);
    ~FileDiffSliderWidget() override;
 
    void clear(bool v);
    void setScrollPos(int total, int value, int size);
    void init(fn_pixmap_maker_t const &pixmap_maker, const ThemePtr &theme);
    void updatePixmap();
    static QPixmap makeDiffPixmap(int width, int height, TextDiffLineList const &lines, ThemePtr theme);
protected:
    void paintEvent(QPaintEvent *) override;
    void resizeEvent(QResizeEvent *) override;
    void mousePressEvent(QMouseEvent *) override;
    void mouseMoveEvent(QMouseEvent *) override;
    void wheelEvent(QWheelEvent *event) override;
signals:
    void valueChanged(int value);
    void scrollByWheel(int lines);
};
 
#endif // FILEDIFFSLIDERWIDGET_H