+++ /dev/null
-/****************************************************************************
-**
-** Copyright (C) Qxt Foundation. Some rights reserved.
-**
-** This file is part of the QxtGui module of the Qt eXTension library
-**
-** This library is free software; you can redistribute it and/or modify it
-** under the terms of th Common Public License, version 1.0, as published by
-** IBM.
-**
-** This file is provided "AS IS", without WARRANTIES OR CONDITIONS OF ANY
-** KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY
-** WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR
-** FITNESS FOR A PARTICULAR PURPOSE.
-**
-** You should have received a copy of the CPL along with this file.
-** See the LICENSE file and the cpl1.0.txt file included with the source
-** distribution for more information. If you did not receive a copy of the
-** license, contact the Qxt Foundation.
-**
-** <http://libqxt.sourceforge.net> <foundation@libqxt.org>
-**
-****************************************************************************/
-#include "qxtspanslider.h"
-#include "qxtspanslider_p.h"
-#include <QKeyEvent>
-#include <QMouseEvent>
-#include <QApplication>
-#include <QStylePainter>
-#include <QStyleOptionSlider>
-
-QxtSpanSliderPrivate::QxtSpanSliderPrivate()
- : lower(0),
- upper(0),
- offset(0),
- position(0),
- lastPressed(NoHandle),
- mainControl(LowerHandle),
- lowerPressed(QStyle::SC_None),
- upperPressed(QStyle::SC_None)
-{}
-
-// TODO: get rid of this in Qt 4.3
-void QxtSpanSliderPrivate::initStyleOption(QStyleOptionSlider* option, SpanHandle handle) const
-{
- if (!option)
- return;
-
- const QSlider* p = &qxt_p();
- option->initFrom(p);
- option->subControls = QStyle::SC_None;
- option->activeSubControls = QStyle::SC_None;
- option->orientation = p->orientation();
- option->maximum = p->maximum();
- option->minimum = p->minimum();
- option->tickPosition = p->tickPosition();
- option->tickInterval = p->tickInterval();
- option->upsideDown = (p->orientation() == Qt::Horizontal) ?
- (p->invertedAppearance() != (option->direction == Qt::RightToLeft)) : (!p->invertedAppearance());
- option->direction = Qt::LeftToRight; // we use the upsideDown option instead
- option->sliderPosition = (handle == LowerHandle ? lower : upper);
- option->sliderValue = (handle == LowerHandle ? lower : upper);
- option->singleStep = p->singleStep();
- option->pageStep = p->pageStep();
- if (p->orientation() == Qt::Horizontal)
- option->state |= QStyle::State_Horizontal;
-}
-
-int QxtSpanSliderPrivate::pixelPosToRangeValue(int pos) const
-{
- QStyleOptionSlider opt;
- initStyleOption(&opt);
-
- int sliderMin = 0;
- int sliderMax = 0;
- int sliderLength = 0;
- const QSlider* p = &qxt_p();
- const QRect gr = p->style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderGroove, p);
- const QRect sr = p->style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, p);
- if (p->orientation() == Qt::Horizontal)
- {
- sliderLength = sr.width();
- sliderMin = gr.x();
- sliderMax = gr.right() - sliderLength + 1;
- }
- else
- {
- sliderLength = sr.height();
- sliderMin = gr.y();
- sliderMax = gr.bottom() - sliderLength + 1;
- }
- return QStyle::sliderValueFromPosition(p->minimum(), p->maximum(), pos - sliderMin,
- sliderMax - sliderMin, opt.upsideDown);
-}
-
-void QxtSpanSliderPrivate::handleMousePress(const QPoint& pos, QStyle::SubControl& control, int value, SpanHandle handle)
-{
- QStyleOptionSlider opt;
- initStyleOption(&opt, handle);
- QSlider* p = &qxt_p();
- const QStyle::SubControl oldControl = control;
- control = p->style()->hitTestComplexControl(QStyle::CC_Slider, &opt, pos, p);
- const QRect sr = p->style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, p);
- if (control == QStyle::SC_SliderHandle)
- {
- position = value;
- offset = pick(pos - sr.topLeft());
- lastPressed = handle;
- p->setSliderDown(true);
- }
- if (control != oldControl)
- p->update(sr);
-}
-
-void QxtSpanSliderPrivate::setupPainter(QPainter* painter, Qt::Orientation orientation, qreal x1, qreal y1, qreal x2, qreal y2) const
-{
- QColor highlight = qxt_p().palette().color(QPalette::Highlight);
- QLinearGradient gradient(x1, y1, x2, y2);
- gradient.setColorAt(0, highlight.dark(120));
- gradient.setColorAt(1, highlight.light(108));
- painter->setBrush(gradient);
-
- if (orientation == Qt::Horizontal)
- painter->setPen(QPen(highlight.dark(130), 0));
- else
- painter->setPen(QPen(highlight.dark(150), 0));
-}
-
-void QxtSpanSliderPrivate::drawSpan(QStylePainter* painter, const QRect& rect) const
-{
- QStyleOptionSlider opt;
- initStyleOption(&opt);
- const QSlider* p = &qxt_p();
-
- // area
- QRect groove = p->style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderGroove, p);
- if (opt.orientation == Qt::Horizontal)
- groove.adjust(0, 0, -1, 0);
- else
- groove.adjust(0, 0, 0, -1);
-
- // pen & brush
- painter->setPen(QPen(p->palette().color(QPalette::Dark).light(110), 0));
- if (opt.orientation == Qt::Horizontal)
- setupPainter(painter, opt.orientation, groove.center().x(), groove.top(), groove.center().x(), groove.bottom());
- else
- setupPainter(painter, opt.orientation, groove.left(), groove.center().y(), groove.right(), groove.center().y());
-
- // draw groove
-#if QT_VERSION >= 0x040200
- painter->drawRect(rect.intersected(groove));
-#else // QT_VERSION < 0x040200
- painter->drawRect(rect.intersect(groove));
-#endif // QT_VERSION
-}
-
-void QxtSpanSliderPrivate::drawHandle(QStylePainter* painter, SpanHandle handle) const
-{
- QStyleOptionSlider opt;
- initStyleOption(&opt, handle);
- opt.subControls = QStyle::SC_SliderHandle;
- QStyle::SubControl pressed = (handle == LowerHandle ? lowerPressed : upperPressed);
- if (pressed == QStyle::SC_SliderHandle)
- {
- opt.activeSubControls = pressed;
- opt.state |= QStyle::State_Sunken;
- }
- painter->drawComplexControl(QStyle::CC_Slider, opt);
-}
-
-void QxtSpanSliderPrivate::triggerAction(QAbstractSlider::SliderAction action, bool main)
-{
- int value = 0;
- bool up = false;
- const int min = qxt_p().minimum();
- const int max = qxt_p().maximum();
- const SpanHandle altControl = (mainControl == LowerHandle ? UpperHandle : LowerHandle);
- switch (action)
- {
- case QAbstractSlider::SliderSingleStepAdd:
- if ((main && mainControl == UpperHandle) || (!main && altControl == UpperHandle))
- {
- value = qBound(min, upper + qxt_p().singleStep(), max);
- up = true;
- break;
- }
- value = qBound(min, lower + qxt_p().singleStep(), max);
- break;
- case QAbstractSlider::SliderSingleStepSub:
- if ((main && mainControl == UpperHandle) || (!main && altControl == UpperHandle))
- {
- value = qBound(min, upper - qxt_p().singleStep(), max);
- up = true;
- break;
- }
- value = qBound(min, lower - qxt_p().singleStep(), max);
- break;
- case QAbstractSlider::SliderToMinimum:
- value = min;
- if ((main && mainControl == UpperHandle) || (!main && altControl == UpperHandle))
- up = true;
- break;
- case QAbstractSlider::SliderToMaximum:
- value = max;
- if ((main && mainControl == UpperHandle) || (!main && altControl == UpperHandle))
- up = true;
- break;
- default:
- qWarning("QxtSpanSliderPrivate::triggerAction: Unknown action");
- break;
- }
-
- if (!up)
- {
- if (value > upper)
- {
- swapControls();
- qxt_p().setUpperValue(value);
- }
- else
- {
- qxt_p().setLowerValue(value);
- }
- }
- else
- {
- if (value < lower)
- {
- swapControls();
- qxt_p().setLowerValue(value);
- }
- else
- {
- qxt_p().setUpperValue(value);
- }
- }
-}
-
-void QxtSpanSliderPrivate::swapControls()
-{
- qSwap(lower, upper);
- qSwap(lowerPressed, upperPressed);
- lastPressed = (lastPressed == LowerHandle ? UpperHandle : LowerHandle);
- mainControl = (mainControl == LowerHandle ? UpperHandle : LowerHandle);
-}
-
-void QxtSpanSliderPrivate::updateRange(int min, int max)
-{
- Q_UNUSED(min);
- Q_UNUSED(max);
- // setSpan() takes care of keeping span in range
- qxt_p().setSpan(lower, upper);
-}
-
-/*!
- \class QxtSpanSlider QxtSpanSlider
- \ingroup QxtGui
- \brief A QSlider with two handles.
-
- QxtSpanSlider is a slider with two handles. QxtSpanSlider is
- handy for letting user to choose an span between min/max.
-
- The span color is calculated based on \b QPalette::Highlight.
-
- The keys are bound according to the following table:
- <table>
- <tr><td><b>Orientation</b></td><td><b>Key</b></td><td><b>Handle</b></td></tr>
- <tr><td>Qt::Horizontal</td><td>Qt::Key_Left</td><td>lower</td></tr>
- <tr><td>Qt::Horizontal</td><td>Qt::Key_Right</td><td>lower</td></tr>
- <tr><td>Qt::Horizontal</td><td>Qt::Key_Up</td><td>upper</td></tr>
- <tr><td>Qt::Horizontal</td><td>Qt::Key_Down</td><td>upper</td></tr>
- <tr><td>Qt::Vertical</td><td>Qt::Key_Up</td><td>lower</td></tr>
- <tr><td>Qt::Vertical</td><td>Qt::Key_Down</td><td>lower</td></tr>
- <tr><td>Qt::Vertical</td><td>Qt::Key_Left</td><td>upper</td></tr>
- <tr><td>Qt::Vertical</td><td>Qt::Key_Right</td><td>upper</td></tr>
- </table>
-
- Keys are bound by the time the slider is created. A key is bound
- to same handle for the lifetime of the slider. So even if the handle
- representation might change from lower to upper, the same key binding
- remains.
-
- \image html qxtspanslider.png "QxtSpanSlider in Plastique style."
-
- \note QxtSpanSlider inherits \b QSlider for implementation specific
- reasons. Adjusting any single handle specific properties like
- <ul>
- <li>\b QAbstractSlider::sliderPosition</li>
- <li>\b QAbstractSlider::value</li>
- </ul>
- has no effect. However, all slider specific properties like
- <ul>
- <li>\b QAbstractSlider::invertedAppearance</li>
- <li>\b QAbstractSlider::invertedControls</li>
- <li>\b QAbstractSlider::minimum</li>
- <li>\b QAbstractSlider::maximum</li>
- <li>\b QAbstractSlider::orientation</li>
- <li>\b QAbstractSlider::pageStep</li>
- <li>\b QAbstractSlider::singleStep</li>
- <li>\b QSlider::tickInterval</li>
- <li>\b QSlider::tickPosition</li>
- </ul>
- are taken into consideration.
- */
-
-/*!
- \fn QxtSpanSlider::lowerValueChanged(int lower)
-
- This signal is emitted whenever the lower value has changed.
- */
-
-/*!
- \fn QxtSpanSlider::upperValueChanged(int upper)
-
- This signal is emitted whenever the upper value has changed.
- */
-
-/*!
- \fn QxtSpanSlider::spanChanged(int lower, int upper)
-
- This signal is emitted whenever the span has changed.
- */
-
-/*!
- Constructs a new QxtSpanSlider with \a parent.
- */
-QxtSpanSlider::QxtSpanSlider(QWidget* parent) : QSlider(parent)
-{
- QXT_INIT_PRIVATE(QxtSpanSlider);
- connect(this, SIGNAL(rangeChanged(int, int)), &qxt_d(), SLOT(updateRange(int, int)));
-}
-
-/*!
- Constructs a new QxtSpanSlider with \a orientation and \a parent.
- */
-QxtSpanSlider::QxtSpanSlider(Qt::Orientation orientation, QWidget* parent) : QSlider(orientation, parent)
-{
- QXT_INIT_PRIVATE(QxtSpanSlider);
- connect(this, SIGNAL(rangeChanged(int, int)), &qxt_d(), SLOT(updateRange(int, int)));
-}
-
-/*!
- Destructs the slider.
- */
-QxtSpanSlider::~QxtSpanSlider()
-{}
-
-/*!
- \property QxtSpanSlider::lowerValue
- \brief This property holds the lower value of the span
- */
-int QxtSpanSlider::lowerValue() const
-{
- return qMin(qxt_d().lower, qxt_d().upper);
-}
-
-void QxtSpanSlider::setLowerValue(int lower)
-{
- setSpan(lower, qxt_d().upper);
-}
-
-/*!
- \property QxtSpanSlider::upperValue
- \brief This property holds the upper value of the span
- */
-int QxtSpanSlider::upperValue() const
-{
- return qMax(qxt_d().lower, qxt_d().upper);
-}
-
-void QxtSpanSlider::setUpperValue(int upper)
-{
- setSpan(qxt_d().lower, upper);
-}
-
-/*!
- Sets the span from \a lower to \a upper.
- \sa upperValue, lowerValue
- */
-void QxtSpanSlider::setSpan(int lower, int upper)
-{
- const int low = qBound(minimum(), qMin(lower, upper), maximum());
- const int upp = qBound(minimum(), qMax(lower, upper), maximum());
- if (low != qxt_d().lower || upp != qxt_d().upper)
- {
- if (low != qxt_d().lower)
- {
- qxt_d().lower = low;
- emit lowerValueChanged(low);
- }
- if (upp != qxt_d().upper)
- {
- qxt_d().upper = upp;
- emit upperValueChanged(upp);
- }
- emit spanChanged(qxt_d().lower, qxt_d().upper);
- update();
- }
-}
-
-void QxtSpanSlider::keyPressEvent(QKeyEvent* event)
-{
- QSlider::keyPressEvent(event);
-
- bool main = true;
- SliderAction action = SliderNoAction;
- switch (event->key())
- {
- case Qt::Key_Left:
- main = (orientation() == Qt::Horizontal);
- action = !invertedAppearance() ? SliderSingleStepSub : SliderSingleStepAdd;
- break;
- case Qt::Key_Right:
- main = (orientation() == Qt::Horizontal);
- action = !invertedAppearance() ? SliderSingleStepAdd : SliderSingleStepSub;
- break;
- case Qt::Key_Up:
- main = (orientation() == Qt::Vertical);
- action = invertedControls() ? SliderSingleStepSub : SliderSingleStepAdd;
- break;
- case Qt::Key_Down:
- main = (orientation() == Qt::Vertical);
- action = invertedControls() ? SliderSingleStepAdd : SliderSingleStepSub;
- break;
- case Qt::Key_Home:
- main = (qxt_d().mainControl == QxtSpanSliderPrivate::LowerHandle);
- action = SliderToMinimum;
- break;
- case Qt::Key_End:
- main = (qxt_d().mainControl == QxtSpanSliderPrivate::UpperHandle);
- action = SliderToMaximum;
- break;
- default:
- event->ignore();
- break;
- }
-
- if (action)
- qxt_d().triggerAction(action, main);
-}
-
-void QxtSpanSlider::mousePressEvent(QMouseEvent* event)
-{
- if (minimum() == maximum() || (event->buttons() ^ event->button()))
- {
- event->ignore();
- return;
- }
-
- qxt_d().handleMousePress(event->pos(), qxt_d().upperPressed, qxt_d().upper, QxtSpanSliderPrivate::UpperHandle);
- if (qxt_d().upperPressed != QStyle::SC_SliderHandle)
- qxt_d().handleMousePress(event->pos(), qxt_d().lowerPressed, qxt_d().lower, QxtSpanSliderPrivate::LowerHandle);
-
- event->accept();
-}
-
-void QxtSpanSlider::mouseMoveEvent(QMouseEvent* event)
-{
- if (qxt_d().lowerPressed != QStyle::SC_SliderHandle && qxt_d().upperPressed != QStyle::SC_SliderHandle)
- {
- event->ignore();
- return;
- }
-
- QStyleOptionSlider opt;
- qxt_d().initStyleOption(&opt);
- const int m = style()->pixelMetric(QStyle::PM_MaximumDragDistance, &opt, this);
- int newPosition = qxt_d().pixelPosToRangeValue(qxt_d().pick(event->pos()) - qxt_d().offset);
- if (m >= 0)
- {
- const QRect r = rect().adjusted(-m, -m, m, m);
- if (!r.contains(event->pos()))
- {
- newPosition = qxt_d().position;
- }
- }
-
- if (qxt_d().lowerPressed == QStyle::SC_SliderHandle)
- {
- if (newPosition > qxt_d().upper)
- {
- qxt_d().swapControls();
- setUpperValue(newPosition);
- }
- else
- {
- setLowerValue(newPosition);
- }
- }
- else if (qxt_d().upperPressed == QStyle::SC_SliderHandle)
- {
- if (newPosition < qxt_d().lower)
- {
- qxt_d().swapControls();
- setLowerValue(newPosition);
- }
- else
- {
- setUpperValue(newPosition);
- }
- }
- event->accept();
-}
-
-void QxtSpanSlider::mouseReleaseEvent(QMouseEvent* event)
-{
- QSlider::mouseReleaseEvent(event);
- qxt_d().lowerPressed = QStyle::SC_None;
- qxt_d().upperPressed = QStyle::SC_None;
- update();
-}
-
-void QxtSpanSlider::paintEvent(QPaintEvent* event)
-{
- Q_UNUSED(event);
- QStylePainter painter(this);
-
- // ticks
- QStyleOptionSlider opt;
- qxt_d().initStyleOption(&opt);
- opt.subControls = QStyle::SC_SliderTickmarks;
- painter.drawComplexControl(QStyle::CC_Slider, opt);
-
- // groove
- opt.sliderPosition = 0;
- opt.subControls = QStyle::SC_SliderGroove;
- painter.drawComplexControl(QStyle::CC_Slider, opt);
-
- // handle rects
- opt.sliderPosition = qxt_d().lower;
- const QRect lr = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, this);
- const int lrv = qxt_d().pick(lr.center());
- opt.sliderPosition = qxt_d().upper;
- const QRect ur = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, this);
- const int urv = qxt_d().pick(ur.center());
-
- // span
- const int minv = qMin(lrv, urv);
- const int maxv = qMax(lrv, urv);
- const QPoint c = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderGroove, this).center();
- QRect spanRect;
- if (orientation() == Qt::Horizontal)
- spanRect = QRect(QPoint(minv, c.y()-2), QPoint(maxv, c.y()+1));
- else
- spanRect = QRect(QPoint(c.x()-2, minv), QPoint(c.x()+1, maxv));
- qxt_d().drawSpan(&painter, spanRect);
-
- // handles
- switch (qxt_d().lastPressed)
- {
- case QxtSpanSliderPrivate::LowerHandle:
- qxt_d().drawHandle(&painter, QxtSpanSliderPrivate::UpperHandle);
- qxt_d().drawHandle(&painter, QxtSpanSliderPrivate::LowerHandle);
- break;
- case QxtSpanSliderPrivate::UpperHandle:
- default:
- qxt_d().drawHandle(&painter, QxtSpanSliderPrivate::LowerHandle);
- qxt_d().drawHandle(&painter, QxtSpanSliderPrivate::UpperHandle);
- break;
- }
-}
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