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182 lines
4.8 KiB
182 lines
4.8 KiB
/*
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Rosegarden
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A MIDI and audio sequencer and musical notation editor.
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This program is Copyright 2000-2008
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Guillaume Laurent <glaurent@telegraph-road.org>,
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Chris Cannam <cannam@all-day-breakfast.com>,
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Richard Bown <richard.bown@ferventsoftware.com>
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The moral rights of Guillaume Laurent, Chris Cannam, and Richard
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Bown to claim authorship of this work have been asserted.
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Other copyrights also apply to some parts of this work. Please
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see the AUTHORS file and individual file headers for details.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#ifndef _RG_ROSEGARDENSCROLLVIEW_H_
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#define _RG_ROSEGARDENSCROLLVIEW_H_
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#include <tqpoint.h>
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#include <tqscrollview.h>
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#include <tqdatetime.h>
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#include <tqtimer.h>
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class TQWidget;
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class TQWheelEvent;
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class TQScrollBar;
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class TQResizeEvent;
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namespace Rosegarden
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{
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/**
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* A TQScrollView with more elaborate auto-scrolling capabilities
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* and the ability to have a "fixed" (non-scrolling) widget at its bottom,
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* just above the bottom scrollbar.
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*/
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class RosegardenScrollView : public TQScrollView
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{
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TQ_OBJECT
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public:
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RosegardenScrollView(TQWidget* parent=0, const char* name=0, WFlags f=0);
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/**
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* EditTool::handleMouseMove() returns a OR-ed combination of these
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* to indicate which direction to scroll to
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*/
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enum {
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NoFollow = 0x0,
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FollowHorizontal = 0x1,
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FollowVertical = 0x2
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};
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/**
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* Sets the canvas width to be exactly the width needed to show
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* all the items
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*/
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// void fitWidthToContents();
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/**
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* Sets the widget which will be between the scrollable part of the view
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* and the horizontal scrollbar
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*/
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void setBottomFixedWidget(TQWidget*);
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void updateBottomWidgetGeometry();
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/// Map a point with the inverse world matrix
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// TQPoint inverseMapPoint(const TQPoint& p) { return inverseWorldMatrix().map(p); }
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void setSmoothScroll(bool s) { m_smoothScroll = s; }
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bool isTimeForSmoothScroll();
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void setScrollDirectionConstraint(int d) { m_scrollDirectionConstraint = d; }
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int getDeltaScroll() { return m_minDeltaScroll; }
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virtual void wheelEvent(TQWheelEvent *);
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public slots:
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/**
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* Scroll horizontally to make the given position visible,
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* paging to as to get some visibility of the next screenful
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* (for playback etc)
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*/
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void slotScrollHoriz(int hpos);
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/**
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* Scroll horizontally to make the given position somewhat
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* nearer to visible, scrolling by only "a small distance"
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* at a time
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*/
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void slotScrollHorizSmallSteps(int hpos);
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/**
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* Scroll vertically to make the given position somewhat
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* nearer to visible, scrolling by only "a small distance"
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* at a time
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*/
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void slotScrollVertSmallSteps(int vpos);
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/**
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* Scroll vertically so as to place the given position
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* somewhere near the top of the viewport.
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*/
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void slotScrollVertToTop(int vpos);
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/**
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* Set the x and y scrollbars to a particular position
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*/
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void slotSetScrollPos(const TQPoint &);
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void startAutoScroll();
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void startAutoScroll(int directionConstraint);
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void stopAutoScroll();
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void doAutoScroll();
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bool isAutoScrolling() const { return m_autoScrolling; }
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signals:
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void bottomWidgetHeightChanged(int);
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void zoomIn();
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void zoomOut();
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protected:
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virtual void resizeEvent(TQResizeEvent*);
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virtual void setHBarGeometry(TQScrollBar &hbar, int x, int y, int w, int h);
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virtual TQScrollBar* getMainHorizontalScrollBar() { return horizontalScrollBar(); }
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//--------------- Data members ---------------------------------
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enum ScrollDirection { None, Top, Bottom, Left, Right };
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TQWidget* m_bottomWidget;
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int m_currentBottomWidgetHeight;
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bool m_smoothScroll;
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int m_smoothScrollTimeInterval;
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float m_minDeltaScroll;
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TQTime m_scrollTimer;
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TQTime m_scrollAccelerationTimer;
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TQTimer m_autoScrollTimer;
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int m_autoScrollTime;
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int m_autoScrollAccel;
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TQPoint m_previousP;
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int m_autoScrollXMargin;
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int m_autoScrollYMargin;
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ScrollDirection m_currentScrollDirection;
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int m_scrollDirectionConstraint;
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bool m_autoScrolling;
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static const int DefaultSmoothScrollTimeInterval;
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static const double DefaultMinDeltaScroll;
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static const int AutoscrollMargin;
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static const int InitialScrollTime;
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static const int InitialScrollAccel;
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static const int MaxScrollDelta;
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static const double ScrollAccelValue;
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};
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}
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#endif
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