FileDiffSliderWidget.h
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FileDiffSliderWidget.h
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	#ifndef FILEDIFFSLIDERWIDGET_H
	#define FILEDIFFSLIDERWIDGET_H

	#include "MainWindow.h"

	#include <QWidget>
	#include <QPixmap>
	#include <functional>

	#include "AbstractCharacterBasedApplication.h"
	#include "Theme.h"

	using TextDiffLine = Document::Line;
	using TextDiffLineList = QList<Document::Line>;

	enum class DiffPane {
	Left,
	Right,
	};

	typedef std::function<QPixmap(DiffPane pane, int width, int height)> fn_pixmap_maker_t;

	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 pixmap_maker, 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