337 lines
10 KiB
C++
337 lines
10 KiB
C++
/***************************************************************************
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amarokslider.cpp - description
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-------------------
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begin : Dec 15 2003
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copyright : (C) 2003 by Mark Kretschmann
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email : markey@web.de
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copyright : (C) 2005 by Gábor Lehel
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email : illissius@gmail.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "sliderwidget.h"
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#include <QApplication>
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#include <QBitmap>
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#include <QBrush>
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#include <QImage>
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#include <QPainter>
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#include <QSize>
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#include <QTimer>
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#include <QStyle>
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#include <QMenu>
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#include <QWheelEvent>
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#include <QMouseEvent>
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#include <QStyleOptionSlider>
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Amarok::Slider::Slider(Qt::Orientation orientation, QWidget* parent, uint max)
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: QSlider(orientation, parent),
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m_sliding(false),
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m_outside(false),
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m_prevValue(0) {
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setRange(0, max);
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}
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void Amarok::Slider::wheelEvent(QWheelEvent* e) {
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if (orientation() == Qt::Vertical) {
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// Will be handled by the parent widget
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e->ignore();
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return;
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}
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// Position Slider (horizontal)
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int step = e->delta() * 1500 / 18;
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int nval = QSlider::value() + step;
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nval = qMax(nval, minimum());
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nval = qMin(nval, maximum());
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QSlider::setValue(nval);
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emit sliderReleased(value());
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}
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void Amarok::Slider::mouseMoveEvent(QMouseEvent* e) {
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if (m_sliding) {
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// feels better, but using set value of 20 is bad of course
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QRect rect(-20, -20, width() + 40, height() + 40);
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if (orientation() == Qt::Horizontal && !rect.contains(e->pos())) {
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if (!m_outside) QSlider::setValue(m_prevValue);
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m_outside = true;
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} else {
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m_outside = false;
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slideEvent(e);
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emit sliderMoved(value());
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}
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} else
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QSlider::mouseMoveEvent(e);
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}
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void Amarok::Slider::slideEvent(QMouseEvent* e) {
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QStyleOptionSlider option;
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initStyleOption(&option);
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QRect sliderRect(style()->subControlRect(QStyle::CC_Slider, &option,
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QStyle::SC_SliderHandle, this));
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QSlider::setValue(
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orientation() == Qt::Horizontal
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? ((QApplication::layoutDirection() == Qt::RightToLeft)
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? QStyle::sliderValueFromPosition(
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minimum(), maximum(),
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width() - (e->pos().x() - sliderRect.width() / 2),
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width() + sliderRect.width(), true)
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: QStyle::sliderValueFromPosition(
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minimum(), maximum(),
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e->pos().x() - sliderRect.width() / 2,
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width() - sliderRect.width()))
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: QStyle::sliderValueFromPosition(
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minimum(), maximum(), e->pos().y() - sliderRect.height() / 2,
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height() - sliderRect.height()));
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}
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void Amarok::Slider::mousePressEvent(QMouseEvent* e) {
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QStyleOptionSlider option;
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initStyleOption(&option);
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QRect sliderRect(style()->subControlRect(QStyle::CC_Slider, &option,
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QStyle::SC_SliderHandle, this));
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m_sliding = true;
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m_prevValue = QSlider::value();
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if (!sliderRect.contains(e->pos())) mouseMoveEvent(e);
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}
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void Amarok::Slider::mouseReleaseEvent(QMouseEvent*) {
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if (!m_outside && QSlider::value() != m_prevValue)
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emit sliderReleased(value());
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m_sliding = false;
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m_outside = false;
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}
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void Amarok::Slider::setValue(int newValue) {
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// don't adjust the slider while the user is dragging it!
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if (!m_sliding || m_outside)
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QSlider::setValue(adjustValue(newValue));
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else
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m_prevValue = newValue;
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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/// CLASS PrettySlider
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//////////////////////////////////////////////////////////////////////////////////////////
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#define THICKNESS 7
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#define MARGIN 3
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Amarok::PrettySlider::PrettySlider(Qt::Orientation orientation, SliderMode mode,
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QWidget* parent, uint max)
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: Amarok::Slider(orientation, parent, max), m_mode(mode) {
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if (m_mode == Pretty) {
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setFocusPolicy(Qt::NoFocus);
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}
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}
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void Amarok::PrettySlider::mousePressEvent(QMouseEvent* e) {
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Amarok::Slider::mousePressEvent(e);
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slideEvent(e);
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}
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void Amarok::PrettySlider::slideEvent(QMouseEvent* e) {
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if (m_mode == Pretty)
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QSlider::setValue(
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orientation() == Qt::Horizontal
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? QStyle::sliderValueFromPosition(minimum(), maximum(),
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e->pos().x(), width() - 2)
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: QStyle::sliderValueFromPosition(minimum(), maximum(),
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e->pos().y(), height() - 2));
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else
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Amarok::Slider::slideEvent(e);
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}
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namespace Amarok {
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namespace ColorScheme {
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extern QColor Background;
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extern QColor Foreground;
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}
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}
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#if 0
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/** these functions aren't required in our fixed size world,
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but they may become useful one day **/
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QSize
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Amarok::PrettySlider::minimumSizeHint() const
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{
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return sizeHint();
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}
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QSize
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Amarok::PrettySlider::sizeHint() const
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{
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constPolish();
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return (orientation() == Horizontal
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? QSize( maxValue(), THICKNESS + MARGIN )
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: QSize( THICKNESS + MARGIN, maxValue() )).expandedTo( QApplit ication::globalStrut() );
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}
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#endif
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//////////////////////////////////////////////////////////////////////////////////////////
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/// CLASS VolumeSlider
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//////////////////////////////////////////////////////////////////////////////////////////
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Amarok::VolumeSlider::VolumeSlider(QWidget* parent, uint max)
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: Amarok::Slider(Qt::Horizontal, parent, max),
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m_animCount(0),
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m_animTimer(new QTimer(this)),
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m_pixmapInset(QPixmap(":volumeslider-inset.png")) {
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setFocusPolicy(Qt::NoFocus);
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// BEGIN Calculate handle animation pixmaps for mouse-over effect
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QImage pixmapHandle(":volumeslider-handle.png");
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QImage pixmapHandleGlow(":volumeslider-handle_glow.png");
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float opacity = 0.0;
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const float step = 1.0 / ANIM_MAX;
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QImage dst;
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for (int i = 0; i < ANIM_MAX; ++i) {
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dst = pixmapHandle.copy();
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QPainter p(&dst);
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p.setOpacity(opacity);
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p.drawImage(0, 0, pixmapHandleGlow);
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p.end();
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m_handlePixmaps.append(QPixmap::fromImage(dst));
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opacity += step;
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}
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// END
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generateGradient();
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setMinimumWidth(m_pixmapInset.width());
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setMinimumHeight(m_pixmapInset.height());
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connect(m_animTimer, SIGNAL(timeout()), this, SLOT(slotAnimTimer()));
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}
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void Amarok::VolumeSlider::generateGradient() {
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const QImage mask(":volumeslider-gradient.png");
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QImage gradient_image(mask.size(), QImage::Format_ARGB32_Premultiplied);
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QPainter p(&gradient_image);
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QLinearGradient gradient(gradient_image.rect().topLeft(),
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gradient_image.rect().topRight());
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gradient.setColorAt(0, palette().color(QPalette::Background));
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gradient.setColorAt(1, palette().color(QPalette::Highlight));
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p.fillRect(gradient_image.rect(), QBrush(gradient));
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p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
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p.drawImage(0, 0, mask);
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p.end();
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m_pixmapGradient = QPixmap::fromImage(gradient_image);
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}
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void Amarok::VolumeSlider::slotAnimTimer() // SLOT
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{
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if (m_animEnter) {
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m_animCount++;
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update();
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if (m_animCount == ANIM_MAX - 1) m_animTimer->stop();
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} else {
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m_animCount--;
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update();
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if (m_animCount == 0) m_animTimer->stop();
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}
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}
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void Amarok::VolumeSlider::mousePressEvent(QMouseEvent* e) {
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if (e->button() != Qt::RightButton) {
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Amarok::Slider::mousePressEvent(e);
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slideEvent(e);
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}
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}
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void Amarok::VolumeSlider::contextMenuEvent(QContextMenuEvent* e) {
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QMap<QAction*, int> values;
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QMenu menu;
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menu.setTitle("Volume");
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values[menu.addAction("100%")] = 100;
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values[menu.addAction("80%")] = 80;
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values[menu.addAction("60%")] = 60;
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values[menu.addAction("40%")] = 40;
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values[menu.addAction("20%")] = 20;
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values[menu.addAction("0%")] = 0;
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QAction* ret = menu.exec(mapToGlobal(e->pos()));
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if (ret) {
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QSlider::setValue(values[ret]);
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emit sliderReleased(values[ret]);
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}
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}
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void Amarok::VolumeSlider::slideEvent(QMouseEvent* e) {
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QSlider::setValue(QStyle::sliderValueFromPosition(minimum(), maximum(),
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e->pos().x(), width() - 2));
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}
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void Amarok::VolumeSlider::wheelEvent(QWheelEvent* e) {
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const uint step = e->delta() / 30;
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QSlider::setValue(QSlider::value() + step);
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emit sliderReleased(value());
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}
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void Amarok::VolumeSlider::paintEvent(QPaintEvent*) {
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QPainter p(this);
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const int padding = 7;
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const int offset = int(double((width() - 2 * padding) * value()) / maximum());
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p.drawPixmap(0, 0, m_pixmapGradient, 0, 0, offset + padding, 0);
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p.drawPixmap(0, 0, m_pixmapInset);
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p.drawPixmap(offset - m_handlePixmaps[0].width() / 2 + padding, 0,
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m_handlePixmaps[m_animCount]);
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// Draw percentage number
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p.setPen(palette().color(QPalette::Disabled, QPalette::Text).dark());
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QFont font;
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font.setPixelSize(9);
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p.setFont(font);
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const QRect rect(0, 0, 34, 15);
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p.drawText(rect, Qt::AlignRight | Qt::AlignVCenter,
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QString::number(value()) + '%');
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}
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void Amarok::VolumeSlider::enterEvent(QEvent*) {
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m_animEnter = true;
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m_animCount = 0;
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m_animTimer->start(ANIM_INTERVAL);
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}
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void Amarok::VolumeSlider::leaveEvent(QEvent*) {
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// This can happen if you enter and leave the widget quickly
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if (m_animCount == 0) m_animCount = 1;
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m_animEnter = false;
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m_animTimer->start(ANIM_INTERVAL);
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}
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void Amarok::VolumeSlider::paletteChange(const QPalette&) {
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generateGradient();
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}
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