plasma-framework/widgets/pushbutton.cpp

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/*
* Copyright 2008 Aaron Seigo <aseigo@kde.org>
* Copyright 2008 Marco Martin <notmart@gmail.com>
*
* 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 "pushbutton.h"
#include <QStyleOptionGraphicsItem>
#include <QPainter>
#include <QDir>
#include <QApplication>
#include <QWeakPointer>
#include <QPropertyAnimation>
#include <kicon.h>
#include <kiconeffect.h>
#include <kmimetype.h>
#include <kpushbutton.h>
#include "theme.h"
#include "svg.h"
#include "framesvg.h"
#include "animator.h"
#include "paintutils.h"
#include "private/actionwidgetinterface_p.h"
#include <plasma/private/focusindicator_p.h>
#include "animations/animation.h"
namespace Plasma
{
class PushButtonPrivate : public ActionWidgetInterface<PushButton>
{
public:
PushButtonPrivate(PushButton *pushButton)
: ActionWidgetInterface<PushButton>(pushButton),
q(pushButton),
background(0),
fadeIn(false),
svg(0),
customFont(false)
{
}
~PushButtonPrivate()
{
delete svg;
}
void setPixmap()
{
if (imagePath.isEmpty()) {
delete svg;
svg = 0;
return;
}
KMimeType::Ptr mime = KMimeType::findByPath(absImagePath);
QPixmap pm;
if (mime->is("image/svg+xml") || mime->is("image/svg+xml-compressed")) {
if (!svg || svg->imagePath() != absImagePath) {
delete svg;
svg = new Svg();
svg->setImagePath(imagePath);
QObject::connect(svg, SIGNAL(repaintNeeded()), q, SLOT(setPixmap()));
if (!svgElement.isNull()) {
svg->setContainsMultipleImages(true);
}
}
//QPainter p(&pm);
if (!svgElement.isEmpty() && svg->hasElement(svgElement)) {
svg->resize();
QSizeF elementSize = svg->elementSize(svgElement);
float scale = q->nativeWidget()->iconSize().width() / qMax(elementSize.width(), elementSize.height());
svg->resize(elementSize * scale);
pm = svg->pixmap(svgElement);
} else {
svg->resize(q->nativeWidget()->iconSize());
pm = svg->pixmap();
}
} else {
delete svg;
svg = 0;
pm = QPixmap(absImagePath);
}
static_cast<KPushButton*>(q->widget())->setIcon(KIcon(pm));
}
void pressedChanged()
{
if (q->nativeWidget()->isDown() || q->nativeWidget()->isChecked()) {
focusIndicator->animateVisibility(false);
} else {
focusIndicator->animateVisibility(true);
}
}
void syncActiveRect();
void syncBorders();
PushButton *q;
FrameSvg *background;
bool fadeIn;
qreal opacity;
QRectF activeRect;
Animation *hoverAnimation;
FocusIndicator *focusIndicator;
QString imagePath;
QString absImagePath;
Svg *svg;
QString svgElement;
bool customFont;
};
void PushButtonPrivate::syncActiveRect()
{
background->setElementPrefix("normal");
qreal left, top, right, bottom;
background->getMargins(left, top, right, bottom);
background->setElementPrefix("active");
qreal activeLeft, activeTop, activeRight, activeBottom;
background->getMargins(activeLeft, activeTop, activeRight, activeBottom);
activeRect = QRectF(QPointF(0, 0), q->size());
activeRect.adjust(left - activeLeft, top - activeTop,
-(right - activeRight), -(bottom - activeBottom));
background->setElementPrefix("normal");
}
void PushButtonPrivate::syncBorders()
{
//set margins from the normal element
qreal left, top, right, bottom;
background->setElementPrefix("normal");
background->getMargins(left, top, right, bottom);
q->setContentsMargins(left, top, right, bottom);
//calc the rect for the over effect
syncActiveRect();
}
PushButton::PushButton(QGraphicsWidget *parent)
: QGraphicsProxyWidget(parent),
d(new PushButtonPrivate(this))
{
d->background = new FrameSvg(this);
d->background->setImagePath("widgets/button");
d->background->setCacheAllRenderedFrames(true);
d->background->setElementPrefix("normal");
d->hoverAnimation = Animator::create(Animator::PixmapTransitionAnimation);
d->hoverAnimation->setTargetWidget(this);
d->hoverAnimation->setProperty("startPixmap", d->background->framePixmap());
KPushButton *native = new KPushButton;
connect(native, SIGNAL(pressed()), this, SIGNAL(pressed()));
connect(native, SIGNAL(pressed()), this, SLOT(pressedChanged()));
connect(native, SIGNAL(released()), this, SIGNAL(released()));
connect(native, SIGNAL(released()), this, SLOT(pressedChanged()));
connect(native, SIGNAL(clicked()), this, SIGNAL(clicked()));
connect(native, SIGNAL(toggled(bool)), this, SIGNAL(toggled(bool)));
setWidget(native);
native->setAttribute(Qt::WA_NoSystemBackground);
native->setWindowIcon(QIcon());
setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
d->focusIndicator = new FocusIndicator(this, "widgets/button");
d->syncBorders();
setAcceptHoverEvents(true);
connect(d->background, SIGNAL(repaintNeeded()), SLOT(syncBorders()));
}
PushButton::~PushButton()
{
delete d;
}
void PushButton::setText(const QString &text)
{
static_cast<KPushButton*>(widget())->setText(text);
updateGeometry();
}
QString PushButton::text() const
{
return static_cast<KPushButton*>(widget())->text();
}
void PushButton::setImage(const QString &path)
{
if (d->imagePath == path) {
return;
}
delete d->svg;
d->svg = 0;
d->imagePath = path;
bool absolutePath = !path.isEmpty() &&
#ifdef Q_WS_WIN
!QDir::isRelativePath(path)
#else
(path[0] == '/' || path.startsWith(QLatin1String(":/")))
#endif
;
if (absolutePath) {
d->absImagePath = path;
} else {
//TODO: package support
d->absImagePath = Theme::defaultTheme()->imagePath(path);
}
d->setPixmap();
}
void PushButton::setImage(const QString &path, const QString &elementid)
{
d->svgElement = elementid;
setImage(path);
}
QString PushButton::image() const
{
return d->imagePath;
}
void PushButton::setStyleSheet(const QString &stylesheet)
{
widget()->setStyleSheet(stylesheet);
}
QString PushButton::styleSheet()
{
return widget()->styleSheet();
}
void PushButton::setAction(QAction *action)
{
d->setAction(action);
}
QAction *PushButton::action() const
{
return d->action;
}
void PushButton::setIcon(const KIcon &icon)
{
nativeWidget()->setIcon(icon);
}
void PushButton::setIcon(const QIcon &icon)
{
setIcon(KIcon(icon));
}
QIcon PushButton::icon() const
{
return nativeWidget()->icon();
}
void PushButton::setCheckable(bool checkable)
{
nativeWidget()->setCheckable(checkable);
}
bool PushButton::isCheckable() const
{
return nativeWidget()->isCheckable();
}
void PushButton::setChecked(bool checked)
{
nativeWidget()->setChecked(checked);
}
bool PushButton::isChecked() const
{
return nativeWidget()->isChecked();
}
bool PushButton::isDown() const
{
return nativeWidget()->isDown();
}
KPushButton *PushButton::nativeWidget() const
{
return static_cast<KPushButton*>(widget());
}
void PushButton::resizeEvent(QGraphicsSceneResizeEvent *event)
{
d->setPixmap();
if (d->background) {
//resize all four panels
d->background->setElementPrefix("pressed");
d->background->resizeFrame(size());
d->syncActiveRect();
d->background->setElementPrefix("active");
d->background->resizeFrame(d->activeRect.size());
d->hoverAnimation->setProperty("targetPixmap", d->background->framePixmap());
d->background->setElementPrefix("focus");
d->background->resizeFrame(d->activeRect.size());
d->background->setElementPrefix("normal");
d->background->resizeFrame(size());
d->hoverAnimation->setProperty("startPixmap", d->background->framePixmap());
}
QGraphicsProxyWidget::resizeEvent(event);
}
void PushButton::paint(QPainter *painter,
const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
if (!styleSheet().isNull() || Theme::defaultTheme()->useNativeWidgetStyle()) {
QGraphicsProxyWidget::paint(painter, option, widget);
return;
}
QPixmap bufferPixmap;
//Normal button, pressed or not
if (isEnabled()) {
if (nativeWidget()->isDown() || nativeWidget()->isChecked()) {
d->background->setElementPrefix("pressed");
} else {
d->background->setElementPrefix("normal");
}
//flat or disabled
} else if (!isEnabled() || nativeWidget()->isFlat()) {
bufferPixmap = QPixmap(rect().size().toSize());
bufferPixmap.fill(Qt::transparent);
QPainter buffPainter(&bufferPixmap);
d->background->paintFrame(&buffPainter);
buffPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
buffPainter.fillRect(bufferPixmap.rect(), QColor(0, 0, 0, 128));
painter->drawPixmap(0, 0, bufferPixmap);
}
//if is under mouse draw the animated glow overlay
if (!nativeWidget()->isDown() && !nativeWidget()->isChecked() && isEnabled() && acceptHoverEvents() && d->background->hasElementPrefix("active")) {
if (d->hoverAnimation->state() == QAbstractAnimation::Running && !isUnderMouse() && !nativeWidget()->isDefault()) {
d->background->setElementPrefix("active");
d->background->paintFrame(painter, d->activeRect.topLeft());
} else {
painter->drawPixmap(
d->activeRect.topLeft(),
d->hoverAnimation->property("currentPixmap").value<QPixmap>());
}
} else if (isEnabled()) {
d->background->paintFrame(painter);
}
painter->setPen(Plasma::Theme::defaultTheme()->color(Theme::ButtonTextColor));
if (nativeWidget()->isDown()) {
painter->translate(QPoint(1, 1));
}
QRectF rect = contentsRect();
if (!nativeWidget()->icon().isNull()) {
const qreal iconSize = qMin(rect.width(), rect.height());
QPixmap iconPix = nativeWidget()->icon().pixmap(iconSize);
if (!isEnabled()) {
KIconEffect *effect = KIconLoader::global()->iconEffect();
iconPix = effect->apply(iconPix, KIconLoader::Toolbar, KIconLoader::DisabledState);
}
QRect pixmapRect;
if (nativeWidget()->text().isEmpty()) {
pixmapRect = nativeWidget()->style()->alignedRect(option->direction, Qt::AlignCenter, iconPix.size(), rect.toRect());
} else {
pixmapRect = nativeWidget()->style()->alignedRect(option->direction, Qt::AlignLeft|Qt::AlignVCenter, iconPix.size(), rect.toRect());
}
painter->drawPixmap(pixmapRect.topLeft(), iconPix);
if (option->direction == Qt::LeftToRight) {
rect.adjust(rect.height(), 0, 0, 0);
} else {
rect.adjust(0, 0, -rect.height(), 0);
}
}
QFont widgetFont;
if (d->customFont) {
widgetFont = font();
} else {
widgetFont = Plasma::Theme::defaultTheme()->font(Plasma::Theme::DefaultFont);
}
QFontMetricsF fm(widgetFont);
// If the height is too small increase the Height of the button to shall the whole text #192988
if (rect.height() < fm.height()) {
rect.setHeight(fm.height());
rect.moveTop(boundingRect().center().y() - rect.height() / 2);
}
// If there is not enough room for the text make it to fade out
if (rect.width() < fm.width(nativeWidget()->text())) {
if (bufferPixmap.isNull()) {
bufferPixmap = QPixmap(rect.size().toSize());
}
bufferPixmap.fill(Qt::transparent);
QPainter p(&bufferPixmap);
p.setPen(painter->pen());
p.setFont(widgetFont);
// Create the alpha gradient for the fade out effect
QLinearGradient alphaGradient(0, 0, 1, 0);
alphaGradient.setCoordinateMode(QGradient::ObjectBoundingMode);
if (option->direction == Qt::LeftToRight) {
alphaGradient.setColorAt(0, QColor(0, 0, 0, 255));
alphaGradient.setColorAt(1, QColor(0, 0, 0, 0));
p.drawText(bufferPixmap.rect(), Qt::AlignLeft|Qt::AlignVCenter|Qt::TextShowMnemonic,
nativeWidget()->text());
} else {
alphaGradient.setColorAt(0, QColor(0, 0, 0, 0));
alphaGradient.setColorAt(1, QColor(0, 0, 0, 255));
p.drawText(bufferPixmap.rect(), Qt::AlignRight|Qt::AlignVCenter|Qt::TextShowMnemonic,
nativeWidget()->text());
}
p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
p.fillRect(bufferPixmap.rect(), alphaGradient);
painter->drawPixmap(rect.topLeft(), bufferPixmap);
} else {
painter->setFont(widgetFont);
painter->drawText(rect, Qt::AlignCenter|Qt::TextShowMnemonic, nativeWidget()->text());
}
}
void PushButton::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
if (nativeWidget()->isDown() || d->background->hasElementPrefix("hover")) {
return;
}
d->hoverAnimation->setProperty("duration", 75);
d->background->setElementPrefix("normal");
d->hoverAnimation->setProperty("startPixmap", d->background->framePixmap());
d->background->setElementPrefix("active");
d->hoverAnimation->setProperty("targetPixmap", d->background->framePixmap());
d->hoverAnimation->start();
QGraphicsProxyWidget::hoverEnterEvent(event);
}
void PushButton::changeEvent(QEvent *event)
{
if (event->type() == QEvent::FontChange) {
d->customFont = true;
}
QGraphicsProxyWidget::changeEvent(event);
}
void PushButton::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
if (nativeWidget()->isDown() || d->background->hasElementPrefix("hover")) {
return;
}
d->hoverAnimation->setProperty("duration", 150);
d->background->setElementPrefix("active");
d->hoverAnimation->setProperty("startPixmap", d->background->framePixmap());
d->background->setElementPrefix("normal");
d->hoverAnimation->setProperty("targetPixmap", d->background->framePixmap());
d->hoverAnimation->start();
QGraphicsProxyWidget::hoverLeaveEvent(event);
}
QSizeF PushButton::sizeHint(Qt::SizeHint which, const QSizeF & constraint) const
{
QSizeF hint = QGraphicsProxyWidget::sizeHint(which, constraint);
if (hint.isEmpty()) {
return hint;
}
//replace the native margin with the Svg one
QStyleOption option;
option.initFrom(nativeWidget());
int nativeMargin = nativeWidget()->style()->pixelMetric(QStyle::PM_ButtonMargin, &option, nativeWidget());
qreal left, top, right, bottom;
d->background->getMargins(left, top, right, bottom);
hint = hint - QSize(nativeMargin, nativeMargin) + QSize(left+right, top+bottom);
return hint;
}
} // namespace Plasma
#include <pushbutton.moc>