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new widget: ItemBackground.

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can be used for all fake item views based on qgraphicswidgets

svn path=/trunk/KDE/kdelibs/; revision=1017544
This commit is contained in:
Marco Martin 2009-08-30 21:17:52 +00:00
parent 024d23a07f
commit 77160a9e50
3 changed files with 226 additions and 0 deletions
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1
CMakeLists.txt
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@ -111,6 +111,7 @@ set(plasma_LIB_SRCS
widgets/frame.cpp
widgets/groupbox.cpp
widgets/iconwidget.cpp
widgets/itembackground.cpp
widgets/label.cpp
widgets/lineedit.cpp
widgets/meter.cpp

156
widgets/itembackground.cpp Normal file
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@ -0,0 +1,156 @@
/***************************************************************************
* Copyright 2009 by Alessandro Diaferia <alediaferia@gmail.com> *
* Copyright 2009 by Marco Martin <notmart@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, 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 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 "itembackground.h"
#include <QPainter>
#include <QStyleOptionGraphicsItem>
#include <KDebug>
#include <Plasma/FrameSvg>
#include <Plasma/Animator>
#include <Plasma/Theme>
class ItemBackgroundPrivate
{
public:
ItemBackgroundPrivate()
{}
Plasma::FrameSvg *frameSvg;
QRectF oldGeometry;
QRectF newGeometry;
int animId;
qreal opacity;
bool fading;
bool fadeIn;
};
ItemBackground::ItemBackground(QGraphicsWidget *parent)
: QGraphicsWidget(parent)
{
d->frameSvg = new Plasma::FrameSvg(this);
d->animId = 0;
d->opacity = 1;
d->fading = false;
d->fadeIn = false;
setContentsMargins(0, 0, 0, 0);
d->frameSvg->setImagePath("widgets/viewitem");
d->frameSvg->setEnabledBorders(Plasma::FrameSvg::AllBorders);
d->frameSvg->setCacheAllRenderedFrames(true);
d->frameSvg->setElementPrefix("hover");
setAcceptedMouseButtons(0);
}
ItemBackground::~ItemBackground()
{}
void ItemBackground::setTarget(const QRectF &newGeometry)
{
if (!isVisible()) {
return;
}
qreal left, top, right, bottom;
d->frameSvg->getMargins(left, top, right, bottom);
d->oldGeometry = geometry();
d->newGeometry = newGeometry.adjusted(-left, -top, right, bottom);
QGraphicsWidget *pw = parentWidget();
if (pw) {
d->newGeometry = d->newGeometry.intersected(QRectF(QPointF(0,0), pw->size()));
}
if (d->animId != 0) {
Plasma::Animator::self()->stopCustomAnimation(d->animId);
}
d->fading = false;
d->opacity = 1;
d->animId = Plasma::Animator::self()->customAnimation(
15, 250, Plasma::Animator::EaseInOutCurve, this, "animationUpdate");
}
void ItemBackground::setTargetItem(QGraphicsItem *target)
{
setTarget(target->boundingRect());
}
QVariant ItemBackground::itemChange(GraphicsItemChange change, const QVariant &value)
{
if (change == ItemVisibleChange) {
bool visible = value.toBool();
d->fading = true;
d->fadeIn = visible;
if (d->animId != 0) {
Plasma::Animator::self()->stopCustomAnimation(d->animId);
}
d->animId = Plasma::Animator::self()->customAnimation(
10, 250, Plasma::Animator::EaseInCurve, this, "animationUpdate");
}
}
void ItemBackground::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(widget)
if (d->frameSvg->frameSize() != option->rect.size()) {
d->frameSvg->resizeFrame(option->rect.size());
}
if (qFuzzyCompare(d->opacity, (qreal)1.0)) {
d->frameSvg->paintFrame(painter, option->rect.topLeft());
} else if (qFuzzyCompare(d->opacity+1, (qreal)1.0)) {
return;
} else {
QPixmap framePix = d->frameSvg->framePixmap();
QPainter bufferPainter(&framePix);
bufferPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
bufferPainter.fillRect(framePix.rect(), QColor(0, 0, 0, 255 * d->opacity));
bufferPainter.end();
painter->drawPixmap(framePix.rect(), framePix, framePix.rect());
}
}
void ItemBackground::animationUpdate(qreal progress)
{
if (progress == 1) {
d->animId = 0;
}
if (d->fading) {
d->opacity = d->fadeIn?progress:1-progress;
if (!d->fadeIn && qFuzzyCompare(d->opacity+1, (qreal)1.0)) {
hide();
}
} else {
setGeometry(d->oldGeometry.x() + (d->newGeometry.x() - d->oldGeometry.x()) * progress,
d->oldGeometry.y() + (d->newGeometry.y() - d->oldGeometry.y()) * progress,
d->oldGeometry.width() + (d->newGeometry.width() - d->oldGeometry.width()) * progress,
d->oldGeometry.height() + (d->newGeometry.height() - d->oldGeometry.height()) * progress);
}
update();
}

69
widgets/itembackground.h Normal file
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@ -0,0 +1,69 @@
/***************************************************************************
* Copyright 2009 by Alessandro Diaferia <alediaferia@gmail.com> *
* Copyright 2009 by Marco Martin <notmart@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, 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 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 . *
***************************************************************************/
#ifndef ITEMBACKGROUND_H
#define ITEMBACKGROUND_H
#include <QGraphicsWidget>
namespace Plasma {
class FrameSvg;
}
class ItemBackgroundPrivate;
/**
* @class ItemBackground plasma/widgets/itembackground.h
*
* @short a background for QGraphicsWidget based item views with animation effects
*
* @since 4.4
*/
class ItemBackground : public QGraphicsWidget
{
Q_OBJECT
public:
ItemBackground(QGraphicsWidget *parent = 0);
~ItemBackground();
/**
* Sets a new target geometry we want at the end of animation
*
* @arg newGeometry the final geometry target
*/
void setTarget(const QRectF &newGeometry);
/**
* set the ItemBackground geometry to be the target geometry, plus the ItemBackground margins
*/
void setTargetItem(QGraphicsItem *target);
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
protected:
QVariant itemChange(GraphicsItemChange change, const QVariant &value);
private Q_SLOTS:
void animationUpdate(qreal progress);
private:
ItemBackgroundPrivate *d;
};
#endif