Mercurial > hg > svgui
view widgets/Panner.h @ 571:ce7b8b790020
* Use macx-g++ qmake spec on OS/X
author | Chris Cannam |
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date | Fri, 08 Oct 2010 12:04:42 +0100 |
parents | c492902dba40 |
children | 13f5f84fbfad |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2006 QMUL. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #ifndef _PANNER_H_ #define _PANNER_H_ #include <QWidget> class Panner : public QWidget { Q_OBJECT public: Panner(QWidget *parent = 0); virtual ~Panner(); void setDefaultRectCentre(float, float); void setThumbColour(QColor colour); void setAlpha(int backgroundAlpha, int thumbAlpha); /** * Set the amount the scroll() function or mouse wheel movement * makes the panner rectangle move by. The default value of 0 * means to select a value automatically based on the dimensions * of the panner rectangle. */ void setScrollUnit(float unit); void getRectExtents(float &x0, float &y0, float &width, float &height); virtual QSize sizeHint() const; signals: /** * Emitted when the panned rectangle is dragged or otherwise * moved. Arguments are x0, y0, width and height of the rectangle * in the range 0 -> 1 as proportions of the width and height of * the whole widget. */ void rectExtentsChanged(float, float, float, float); /** * Emitted when the rectangle is dragged or otherwise moved (as * well as extentsChanged). Arguments are the centre coordinates * of the rectangle in the range 0 -> 1 as proportions of the * width and height of the whole widget. */ void rectCentreMoved(float, float); /** * Emitted when the panner is double-clicked (for the "customer" * code to pop up a value editing dialog, for example). */ void doubleClicked(); void mouseEntered(); void mouseLeft(); public slots: /** * Set the extents of the panned rectangle within the overall * panner widget. Coordinates are in the range 0 -> 1 in both axes, * with 0 at the top in the y axis. */ void setRectExtents(float x0, float y0, float width, float height); /** * Set the width of the panned rectangle as a fraction (0 -> 1) of * that of the whole panner widget. */ void setRectWidth(float width); /** * Set the height of the panned rectangle as a fraction (0 -> 1) * of that of the whole panner widget. */ void setRectHeight(float height); /** * Set the location of the centre of the panned rectangle on the x * axis, as a proportion (0 -> 1) of the width of the whole panner * widget. */ void setRectCentreX(float x); /** * Set the location of the centre of the panned rectangle on the y * axis, as a proportion (0 -> 1) of the height of the whole panner * widget. */ void setRectCentreY(float y); /** * Move up (if up is true) or down a bit. This is basically the * same action as rolling the mouse wheel one notch. */ void scroll(bool up); void resetToDefault(); protected: virtual void mousePressEvent(QMouseEvent *e); virtual void mouseDoubleClickEvent(QMouseEvent *e); virtual void mouseMoveEvent(QMouseEvent *e); virtual void mouseReleaseEvent(QMouseEvent *e); virtual void wheelEvent(QWheelEvent *e); virtual void paintEvent(QPaintEvent *e); virtual void enterEvent(QEvent *); virtual void leaveEvent(QEvent *); void normalise(); void emitAndUpdate(); float m_rectX; float m_rectY; float m_rectWidth; float m_rectHeight; float m_scrollUnit; float m_defaultCentreX; float m_defaultCentreY; bool m_defaultsSet; QColor m_thumbColour; int m_backgroundAlpha; int m_thumbAlpha; float centreX() const { return m_rectX + m_rectWidth/2; } float centreY() const { return m_rectY + m_rectHeight/2; } bool m_clicked; QPoint m_clickPos; float m_dragStartX; float m_dragStartY; }; #endif