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173 lines
4.0 KiB
173 lines
4.0 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_ZOOMSLIDER_H_
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#define _RG_ZOOMSLIDER_H_
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#include <tqslider.h>
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#include <vector>
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class T;
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class TQWidget;
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namespace Rosegarden
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{
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template <class T>
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class ZoomSlider : public TQSlider
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{
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public:
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/**
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* Construct a ZoomSlider offering a selection from the
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* given set of sizes.
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*
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* A ZoomSlider is a not-very-well-named slider widget that
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* offers the user an integral range of values (say, 1..3)
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* but maps those values internally onto a list of "sizes",
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* which may be any values of any type (for example the
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* strings "small", "medium" or "large" or the doubles 1.0,
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* 1.2 and 1.5). It may be useful where a GUI wants to
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* offer a fairly limited range of sizes or options that
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* may actually be arbitrary values chosen because they
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* work well for some internal reason but that should appear
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* to the user as a nice continuous range.
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*/
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ZoomSlider(const std::vector<T> &sizes, T defaultValue,
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TQt::Orientation, TQWidget * parent, const char * name=0);
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virtual ~ZoomSlider();
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void reinitialise(const std::vector<T> &sizes, T defaultValue);
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const T &getCurrentSize() const;
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const T &getDefault() const;
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public slots:
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void setToDefault(); // restore the initial value
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void setSize(T size);
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void increment();
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void decrement();
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protected:
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static int getIndex(const std::vector<T> &, T size);
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std::vector<T> m_sizes;
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T m_defaultValue;
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};
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template<class T>
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ZoomSlider<T>::ZoomSlider(const std::vector<T> &sizes,
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T initialSize, TQt::Orientation o,
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TQWidget *parent, const char *name) :
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TQSlider(0, sizes.size()-1, 1,
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getIndex(sizes, initialSize), o, parent, name),
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m_sizes(sizes),
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m_defaultValue(initialSize)
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{
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setTracking(false);
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setFixedWidth(150);
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setFixedHeight(15);
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setLineStep(1);
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setTickmarks(Below);
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}
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template<class T>
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ZoomSlider<T>::~ZoomSlider() { }
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template<class T>
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int
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ZoomSlider<T>::getIndex(const std::vector<T> &sizes, T size)
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{
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for (unsigned int i = 0; i < sizes.size(); ++i) {
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if (sizes[i] == size) return i;
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}
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return sizes.size()/2;
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}
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template<class T>
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void
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ZoomSlider<T>::reinitialise(const std::vector<T> &sizes, T size)
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{
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m_sizes = sizes;
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setMinValue(0);
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setMaxValue(sizes.size()-1);
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setValue(getIndex(sizes, size));
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setLineStep(1);
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setTickmarks(Below);
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}
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template<class T>
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void
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ZoomSlider<T>::setToDefault()
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{
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setValue(getIndex(m_sizes, m_defaultValue));
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}
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template <class T>
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const T &
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ZoomSlider<T>::getCurrentSize() const
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{
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return m_sizes[value()];
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}
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template <class T>
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void
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ZoomSlider<T>::setSize(T size)
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{
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setValue(getIndex(m_sizes, size));
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}
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template <class T>
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void
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ZoomSlider<T>::increment()
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{
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if (value() + 1 >= m_sizes.size()) return;
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setValue(value() + 1);
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}
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template <class T>
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void
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ZoomSlider<T>::decrement()
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{
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if (value() <= 0) return;
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setValue(value() - 1);
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}
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template <class T>
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const T &
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ZoomSlider<T>::getDefault() const
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{
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return m_defaultValue;
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}
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}
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#endif
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