slider.h

来自「爱可视605看PDF程式源代码, 基于APDF」· C头文件 代码 · 共 78 行

#ifndef SLIDER_H
#define SLIDER_H

#include <qpixmap.h>
#include <qwidget.h>
#include <qrect.h>
#include <qsize.h>
#include <qtimer.h>
#include <qpoint.h>

#include <archos/screen.h>

class SpeedUpTimer : public QTimer {
	Q_OBJECT
  public:
	SpeedUpTimer(QObject *parent = 0);
	void setIntervals(int startInterval, int finalInterval);
	void start();
	void stop();

  private slots:
	void decreaseInterval();

  private:
	int m_startInterval, m_finalInterval, m_currentInterval;
};

class Slider : public QWidget {
	Q_OBJECT
  public:
	Slider(int width, QWidget *parent = 0, const char *name = 0);
	int getValue();
	void setValues(int x, int y);
	void reset();
	virtual QSize sizeHint() const;

  signals:
	void valueChanged(int);

  protected:
	virtual void paintEvent(QPaintEvent *evt);
	virtual void keyPressEvent(QKeyEvent *e);
	virtual void keyReleaseEvent(QKeyEvent *e);
	virtual void mouseMoveEvent(QMouseEvent *e);
	virtual void mousePressEvent(QMouseEvent *e);
	virtual void mouseReleaseEvent(QMouseEvent *e);

  private slots:
	void updateValue();

  private:
	void incValue();
	void decValue();
	void incValueBy10();
	void decValueBy10();
	QRect leftArrowRect();
	QRect rightArrowRect();
	QRect sliderRect();
	int sliderPosToValue(int x);
	void setupBitmaps();

	int m_x, m_y;

	static QPixmap *s_larrow, *s_rarrow, *s_empty_left, *s_empty_center,
		*s_empty_right, *s_cursor, *s_center;
	int m_sliderLength, m_sliderLastStep;
	QPoint m_leftArrowPos, m_rightArrowPos, m_sliderStartPos;
	bool m_cursorSnapped;
	SpeedUpTimer kbd_timer, mouse_timer;
	enum { left = 0, right } m_direction;
	int m_stepSize;

	static archos::ScreenMode s_mode;
	static QString s_widthTemplate;
};

#endif // SLIDER_H