plasma-framework/widgets/slider.cpp

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/*
* Copyright 2008 Aaron Seigo <aseigo@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "slider.h"
#include <QApplication>
#include <QPainter>
#include <QSlider>
#include <QStyleOptionSlider>
#include <QGraphicsSceneWheelEvent>
#include <kmimetype.h>
#include "theme.h"
#include "framesvg.h"
#include "private/style_p.h"
#include "private/focusindicator_p.h"
namespace Plasma
{
class SliderPrivate
{
public:
SliderPrivate()
{
}
~SliderPrivate()
{
}
Plasma::FrameSvg *background;
Plasma::Style::Ptr style;
FocusIndicator *focusIndicator;
};
Slider::Slider(QGraphicsWidget *parent)
: QGraphicsProxyWidget(parent),
d(new SliderPrivate)
{
QSlider *native = new QSlider;
connect(native, SIGNAL(sliderMoved(int)), this, SIGNAL(sliderMoved(int)));
connect(native, SIGNAL(valueChanged(int)), this, SIGNAL(valueChanged(int)));
d->focusIndicator = new FocusIndicator(this, "widgets/slider");
setWidget(native);
native->setAttribute(Qt::WA_NoSystemBackground);
d->background = new Plasma::FrameSvg(this);
d->background->setImagePath("widgets/slider");
d->style = Plasma::Style::sharedStyle();
native->setStyle(d->style.data());
}
Slider::~Slider()
{
delete d;
Plasma::Style::doneWithSharedStyle();
}
void Slider::paint(QPainter *painter,
const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
if (!styleSheet().isNull() || Theme::defaultTheme()->useNativeWidgetStyle()) {
QGraphicsProxyWidget::paint(painter, option, widget);
return;
}
QSlider *slider = nativeWidget();
QStyle *style = slider->style();
QStyleOptionSlider sliderOpt;
sliderOpt.initFrom(slider);
//init the other stuff in the slider, taken from initStyleOption()
sliderOpt.subControls = QStyle::SC_None;
sliderOpt.activeSubControls = QStyle::SC_None;
sliderOpt.orientation = slider->orientation();
sliderOpt.maximum = slider->maximum();
sliderOpt.minimum = slider->minimum();
sliderOpt.tickPosition = (QSlider::TickPosition)slider->tickPosition();
sliderOpt.tickInterval = slider->tickInterval();
sliderOpt.upsideDown = (slider->orientation() == Qt::Horizontal) ?
(slider->invertedAppearance() != (sliderOpt.direction == Qt::RightToLeft))
: (!slider->invertedAppearance());
sliderOpt.direction = Qt::LeftToRight; // we use the upsideDown option instead
sliderOpt.sliderPosition = slider->sliderPosition();
sliderOpt.sliderValue = slider->value();
sliderOpt.singleStep = slider->singleStep();
sliderOpt.pageStep = slider->pageStep();
if (slider->orientation() == Qt::Horizontal) {
sliderOpt.state |= QStyle::State_Horizontal;
}
QRect backgroundRect =
style->subControlRect(QStyle::CC_Slider, &sliderOpt, QStyle::SC_SliderGroove, slider);
if (sliderOpt.orientation == Qt::Horizontal &&
d->background->hasElement("horizontal-background-center")) {
d->background->setElementPrefix("horizontal-background");
d->background->resizeFrame(backgroundRect.size());
d->background->paintFrame(painter, backgroundRect.topLeft());
} else if (sliderOpt.orientation == Qt::Vertical &&
d->background->hasElement("vertical-background-center")) {
d->background->setElementPrefix("vertical-background");
d->background->resizeFrame(backgroundRect.size());
d->background->paintFrame(painter, backgroundRect.topLeft());
} else if (sliderOpt.orientation == Qt::Horizontal) {
QRect elementRect = d->background->elementRect("horizontal-slider-line").toRect();
elementRect.setWidth(sliderOpt.rect.width());
elementRect.moveCenter(sliderOpt.rect.center());
d->background->paint(painter, elementRect, "horizontal-slider-line");
} else {
QRect elementRect = d->background->elementRect("vertical-slider-line").toRect();
elementRect.setHeight(sliderOpt.rect.height());
elementRect.moveCenter(sliderOpt.rect.center());
d->background->paint(painter, elementRect, "vertical-slider-line");
}
//Tickmarks
if (sliderOpt.tickPosition != QSlider::NoTicks) {
sliderOpt.subControls = QStyle::SC_SliderTickmarks;
sliderOpt.palette.setColor(
QPalette::WindowText, Plasma::Theme::defaultTheme()->color(Theme::TextColor));
style->drawComplexControl(QStyle::CC_Slider, &sliderOpt, painter, slider);
}
QRect handleRect =
style->subControlRect(QStyle::CC_Slider, &sliderOpt, QStyle::SC_SliderHandle, slider);
QString handle;
if (sliderOpt.orientation == Qt::Horizontal) {
handle = "horizontal-slider-handle";
} else {
handle = "vertical-slider-handle";
}
QRect elementRect = d->background->elementRect(handle).toRect();
elementRect.moveCenter(handleRect.center());
if (orientation() == Qt::Vertical) {
d->focusIndicator->setCustomPrefix("vertical-slider");
} else {
d->focusIndicator->setCustomPrefix("horizontal-slider");
}
d->focusIndicator->setCustomGeometry(elementRect);
d->background->paint(painter, elementRect, handle);
}
void Slider::wheelEvent(QGraphicsSceneWheelEvent *event)
{
QWheelEvent e(event->pos().toPoint(), event->delta(),event->buttons(),event->modifiers(),event->orientation());
QApplication::sendEvent(widget(), &e);
event->accept();
}
void Slider::setMaximum(int max)
{
static_cast<QSlider*>(widget())->setMaximum(max);
}
int Slider::maximum() const
{
return static_cast<QSlider*>(widget())->maximum();
}
void Slider::setMinimum(int min)
{
static_cast<QSlider*>(widget())->setMinimum(min);
}
int Slider::minimum() const
{
return static_cast<QSlider*>(widget())->minimum();
}
void Slider::setRange(int min, int max)
{
static_cast<QSlider*>(widget())->setRange(min, max);
}
void Slider::setValue(int value)
{
static_cast<QSlider*>(widget())->setValue(value);
}
int Slider::value() const
{
return static_cast<QSlider*>(widget())->value();
}
void Slider::setOrientation(Qt::Orientation orientation)
{
static_cast<QSlider*>(widget())->setOrientation(orientation);
}
Qt::Orientation Slider::orientation() const
{
return static_cast<QSlider*>(widget())->orientation();
}
void Slider::setStyleSheet(const QString &stylesheet)
{
widget()->setStyleSheet(stylesheet);
}
QString Slider::styleSheet()
{
return widget()->styleSheet();
}
QSlider *Slider::nativeWidget() const
{
return static_cast<QSlider*>(widget());
}
} // namespace Plasma
#include <slider.moc>