plasma-framework/widgets/icon.cpp

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/*
* Copyright (C) 2007 by 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 version 2 as
* published by the Free Software Foundation
*
* 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 "icon.h"
#include <QPainter>
#include <QGraphicsSceneMouseEvent>
#include <KIcon>
#include <KDebug>
#include "svg.h"
namespace Plasma
{
class Icon::Private
{
public:
Private()
: size(128*1.1, 128*1.1),
state(Private::NoState),
svg("widgets/iconbutton")
{
svg.setContentType(Plasma::Svg::ImageSet);
svg.resize(size);
minSize = size;
maxSize = size;
if (svg.elementExists("background")) {
svgElements |= SvgBackground;
}
if (svg.elementExists("background-hover")) {
svgElements |= SvgBackgroundHover;
}
if (svg.elementExists("background-pressed")) {
svgElements |= SvgBackgroundPressed;
}
if (svg.elementExists("foreground")) {
svgElements |= SvgForeground;
}
if (svg.elementExists("foreground-hover")) {
svgElements |= SvgForegroundHover;
}
if (svg.elementExists("foreground-pressed")) {
svgElements |= SvgForegroundPressed;
}
}
~Private() {}
enum ButtonState
{
NoState,
HoverState,
PressedState
};
enum { NoSvg = 0,
SvgBackground = 1,
SvgBackgroundHover = 2,
SvgBackgroundPressed = 4,
SvgForeground = 8,
SvgForegroundHover = 16,
SvgForegroundPressed = 32 };
QString text;
QIcon icon;
QSizeF size;
QSizeF minSize;
QSizeF maxSize;
ButtonState state;
Svg svg;
int svgElements;
};
Icon::Icon(QGraphicsItem *parent)
: QObject(),
QGraphicsItem(parent),
d(new Private)
{
setAcceptedMouseButtons(Qt::LeftButton);
setAcceptsHoverEvents(true);
setEnabled(true);
setPos(QPointF(0.0,0.0));
}
Icon::~Icon()
{
delete d;
}
QRectF Icon::boundingRect() const
{
return QRectF(QPointF(0, 0), d->size);
}
void Icon::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(option)
Q_UNUSED(widget)
// QRectF rect = boundingRect();
QString element;
if (d->svgElements & Private::SvgBackground) {
element = "background";
}
switch (d->state) {
case Private::NoState:
break;
case Private::HoverState:
if (d->svgElements & Private::SvgBackgroundHover) {
element = "background-hover";
}
break;
case Private::PressedState:
if (d->svgElements & Private::SvgBackgroundPressed) {
element = "background-pressed";
}
break;
}
if (!element.isEmpty()) {
//kDebug() << "painting " << element << endl;
d->svg.paint(painter, 0, 0, element);
element = QString();
}
if (!d->icon.isNull()) {
int deltaX = d->size.width() * 0.1;
int deltaY = d->size.height() * 0.1;
painter->drawPixmap(deltaX, deltaY, d->icon.pixmap((d->size * 0.9).toSize()));
}
//TODO: draw text
if (d->svgElements & Private::SvgForeground) {
element = "foreground";
}
switch (d->state) {
case Private::NoState:
break;
case Private::HoverState:
if (d->svgElements & Private::SvgForegroundHover) {
element = "foreground-hover";
}
break;
case Private::PressedState:
if (d->svgElements & Private::SvgForegroundPressed) {
element = "foreground-pressed";
}
break;
}
if (!element.isEmpty()) {
//kDebug() << "painting " << element << endl;
d->svg.paint(painter, 0, 0, element);
}
}
void Icon::setText(const QString& text)
{
d->text = text;
//TODO: implement this puppy calculateSize();
}
QString Icon::text() const
{
return d->text;
}
void Icon::setIcon(const QString& icon)
{
if (icon.isEmpty()) {
setIcon(QIcon());
return;
}
setIcon(KIcon(icon));
}
void Icon::setIcon(const QIcon& icon)
{
d->icon = icon;
update();
}
QSizeF Icon::size() const
{
return d->size;
}
void Icon::setSize(const QSizeF& s)
{
prepareGeometryChange();
d->size = s.boundedTo(d->maxSize); //FIXME: maxSize always == size means it can be changed. wtf. =)
d->svg.resize(d->size);
update();
}
void Icon::setSize(int w, int h)
{
setSize(QSizeF(w, h));
}
bool Icon::isDown()
{
return d->state == Private::PressedState;
}
void Icon::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
d->state = Private::PressedState;
emit pressed(true);
QGraphicsItem::mousePressEvent(event);
update();
}
void Icon::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
bool inside = boundingRect().contains(event->pos());
bool wasClicked = d->state == Private::PressedState && inside;
if (inside) {
d->state = Private::HoverState;
} else {
d->state = Private::NoState;
}
if (wasClicked) {
emit pressed(false);
emit clicked();
}
QGraphicsItem::mouseReleaseEvent(event);
update();
}
void Icon::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
d->state = Private::HoverState;
QGraphicsItem::hoverEnterEvent(event);
}
void Icon::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
d->state = Private::NoState;
QGraphicsItem::hoverLeaveEvent(event);
}
QSizeF Icon::sizeHint() const
{
return d->size;
}
QSizeF Icon::minimumSize() const
{
return d->minSize;
}
QSizeF Icon::maximumSize() const
{
return d->maxSize;
}
Qt::Orientations Icon::expandingDirections() const
{
return Qt::Horizontal;
}
bool Icon::hasHeightForWidth() const
{
return true;
}
qreal Icon::heightForWidth(qreal w) const
{
return w; //FIXME: we shouldn't assume squareness but actually calculate based on text and what not
}
bool Icon::hasWidthForHeight() const
{
return true;
}
qreal Icon::widthForHeight(qreal h) const
{
return h; //FIXME: we shouldn't assume squareness but actually calculate based on text and what not
}
QRectF Icon::geometry() const
{
return boundingRect().toRect();
}
void Icon::setGeometry(const QRectF &r)
{
setSize(r.size());
setPos(r.x(),r.y());
}
} // namespace Plasma
#include "icon.moc"