plasma-framework/widgets/flash.cpp
Aaron J. Seigo afb72ab0c7 * make flash not reset the flash every time the text/pixmap is set if it already in the process of showing.
* clean up a lot of the code
* don't use single shots, as they may need to be interupted

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=862833
2008-09-20 01:03:30 +00:00

241 lines
5.9 KiB
C++

/*
* Copyright 2007 by André Duffeck <duffeck@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 Stre
* et, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "flash.h"
#include <QtCore/QString>
#include <QtCore/QTimeLine>
#include <QtCore/QTimer>
#include <QtGui/QPainter>
#include <QtGui/QPixmap>
#include <QtGui/QColor>
#include <KDebug>
#include <plasma/animator.h>
using namespace Plasma;
class Plasma::FlashPrivate
{
public:
enum FlashType { Text, Pixmap };
enum State { Visible, Invisible };
FlashPrivate()
: defaultDuration(3000),
type(FlashPrivate::Text),
color(Qt::black),
animId(0),
state(FlashPrivate::Invisible)
{
//TODO: put this on a diet by using timerEvent instead?
fadeOutTimer.setInterval(defaultDuration);
fadeOutTimer.setSingleShot(true);
fadeInTimer.setInterval(0);
fadeInTimer.setSingleShot(true);
}
~FlashPrivate() { }
void renderPixmap(const QSize &size);
void setupFlash(Flash *flash, int duration);
int defaultDuration;
FlashType type;
QTimer fadeInTimer;
QTimer fadeOutTimer;
QString text;
QColor color;
QFont font;
QPixmap pixmap;
int animId;
QPixmap renderedPixmap;
QTextOption textOption;
Qt::Alignment alignment;
State state;
};
Flash::Flash(QGraphicsItem *parent)
: QGraphicsWidget(parent),
d(new FlashPrivate)
{
setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum);
setCacheMode(NoCache);
connect(&d->fadeOutTimer, SIGNAL(timeout()), this, SLOT(fadeOut()));
connect(&d->fadeInTimer, SIGNAL(timeout()), this, SLOT(fadeIn()));
}
Flash::~Flash()
{
delete d;
}
void Flash::setDuration(int duration)
{
if (duration < 1) {
return;
}
d->defaultDuration = duration;
}
void Flash::setColor(const QColor &color)
{
d->color = color;
}
void Flash::setFont(const QFont &font)
{
d->font = font;
}
void Flash::flash(const QString &text, int duration, const QTextOption &option)
{
if (text.isEmpty()) {
return;
}
//kDebug() << duration << text;
d->type = FlashPrivate::Text;
d->text = text;
d->textOption = option;
d->setupFlash(this, duration);
}
void Flash::flash(const QPixmap &pixmap, int duration, Qt::Alignment align)
{
if (pixmap.isNull()) {
return;
}
d->type = FlashPrivate::Pixmap;
d->pixmap = pixmap;
d->alignment = align;
d->setupFlash(this, duration);
}
void Flash::kill()
{
d->fadeInTimer.stop();
if (d->state == FlashPrivate::Visible) {
fadeOut();
}
}
void Flash::fadeIn()
{
//kDebug();
d->state = FlashPrivate::Visible;
d->animId = Plasma::Animator::self()->animateElement(this, Plasma::Animator::AppearAnimation);
Plasma::Animator::self()->setInitialPixmap(d->animId, d->renderedPixmap);
}
void Flash::fadeOut()
{
if (d->state == FlashPrivate::Invisible) {
return; // Flash was already killed - do not animate again
}
d->state = FlashPrivate::Invisible;
d->animId = Plasma::Animator::self()->animateElement(this, Plasma::Animator::DisappearAnimation);
Plasma::Animator::self()->setInitialPixmap(d->animId, d->renderedPixmap);
}
void Flash::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(option)
Q_UNUSED(widget)
if (d->animId && !Plasma::Animator::self()->currentPixmap(d->animId).isNull()) {
painter->drawPixmap(0, 0, Plasma::Animator::self()->currentPixmap(d->animId));
} else {
d->animId = 0;
if (d->state == FlashPrivate::Visible) {
painter->drawPixmap(0, 0, d->renderedPixmap);
}
}
}
void FlashPrivate::renderPixmap(const QSize &size)
{
if (renderedPixmap.size() != size) {
renderedPixmap = QPixmap(size);
}
renderedPixmap.fill(Qt::transparent);
QPainter painter(&renderedPixmap);
if (type == FlashPrivate::Text) {
painter.setPen(color);
painter.setFont(font);
painter.drawText(QRect(QPoint(0, 0), size), text, textOption);
} else if (type == FlashPrivate::Pixmap) {
QPoint p;
if(alignment & Qt::AlignLeft) {
p.setX(0);
} else if (alignment & Qt::AlignRight) {
p.setX(size.width() - pixmap.width());
} else {
p.setX((size.width() - pixmap.width())/2);
}
if (alignment & Qt::AlignTop) {
p.setY(0);
} else if (alignment & Qt::AlignRight) {
p.setY(size.height() - pixmap.height());
} else {
p.setY((size.height() - pixmap.height())/2);
}
painter.drawPixmap(p, pixmap);
}
painter.end();
if (animId) {
Plasma::Animator::self()->setInitialPixmap(animId, renderedPixmap);
}
}
void FlashPrivate::setupFlash(Flash *flash, int duration)
{
fadeOutTimer.stop();
fadeOutTimer.setInterval(duration > 0 ? duration : defaultDuration);
renderPixmap(flash->size().toSize());
if (state != FlashPrivate::Visible) {
fadeInTimer.start();
} else {
flash->update();
}
if (fadeOutTimer.interval() > 0) {
fadeOutTimer.start();
}
}
#include "flash.moc"