plasma-framework/panelsvg.cpp
Marco Martin 1a321f0df1 contentsRect() function, consistent with QGraphicsWidget::contentsRect()
svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=851491
2008-08-23 20:36:09 +00:00

653 lines
19 KiB
C++

/*
* Copyright 2008 by 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 "panelsvg.h"
#include <QPainter>
#include <QSize>
#include <QBitmap>
#include <KDebug>
#include <plasma/theme.h>
namespace Plasma
{
class PanelData
{
public:
PanelData()
: enabledBorders(PanelSvg::AllBorders),
cachedBackground(0),
panelSize(-1,-1)
{
}
PanelData(const PanelData &other)
: enabledBorders(other.enabledBorders),
cachedBackground(0),
panelSize(other.panelSize)
{
}
~PanelData()
{
delete cachedBackground;
}
PanelSvg::EnabledBorders enabledBorders;
QPixmap *cachedBackground;
QSizeF panelSize;
//measures
int topHeight;
int leftWidth;
int rightWidth;
int bottomHeight;
//margins, are equal to the measures by default
int topMargin;
int leftMargin;
int rightMargin;
int bottomMargin;
//size of the svg where the size of the "center"
//element is contentWidth x contentHeight
bool noBorderPadding : 1;
bool stretchBorders : 1;
bool tileCenter : 1;
};
class PanelSvgPrivate
{
public:
PanelSvgPrivate(PanelSvg *psvg)
: q(psvg),
cacheAll(false)
{
}
~PanelSvgPrivate()
{
qDeleteAll(panels);
panels.clear();
}
void generateBackground(PanelData *panel);
void updateSizes();
void updateNeeded();
void updateAndSignalSizes();
Location location;
QString prefix;
PanelSvg *q;
bool cacheAll : 1;
QHash<QString, PanelData*> panels;
};
PanelSvg::PanelSvg(QObject* parent)
: Svg(parent),
d(new PanelSvgPrivate(this))
{
connect(this, SIGNAL(repaintNeeded()), this, SLOT(updateNeeded()));
d->panels.insert(QString(), new PanelData());
}
PanelSvg::~PanelSvg()
{
delete d;
}
void PanelSvg::setImagePath(const QString& path)
{
if (path == imagePath()) {
return;
}
Svg::setImagePath(path);
clearCache();
d->updateAndSignalSizes();
}
void PanelSvg::setEnabledBorders(const EnabledBorders borders)
{
if (borders == d->panels[d->prefix]->enabledBorders) {
return;
}
d->panels[d->prefix]->enabledBorders = borders;
d->updateAndSignalSizes();
}
PanelSvg::EnabledBorders PanelSvg::enabledBorders() const
{
QHash<QString, PanelData*>::const_iterator it = d->panels.constFind(d->prefix);
if (it != d->panels.constEnd()) {
return it.value()->enabledBorders;
} else {
return NoBorder;
}
}
void PanelSvg::setElementPrefix(Plasma::Location location)
{
switch (location) {
case TopEdge:
setElementPrefix("north");
break;
case BottomEdge:
setElementPrefix("south");
break;
case LeftEdge:
setElementPrefix("west");
break;
case RightEdge:
setElementPrefix("east");
break;
default:
setElementPrefix(QString());
break;
}
d->location = location;
}
void PanelSvg::setElementPrefix(const QString & prefix)
{
const QString oldPrefix(d->prefix);
if (!hasElement(prefix + "-center")) {
d->prefix.clear();
} else {
d->prefix = prefix;
if (!d->prefix.isEmpty()) {
d->prefix += '-';
}
}
if (oldPrefix == d->prefix && d->panels[oldPrefix]) {
return;
}
if (!d->panels.contains(d->prefix)) {
d->panels.insert(d->prefix, new PanelData(*(d->panels[oldPrefix])));
d->updateSizes();
}
if (!d->cacheAll) {
delete d->panels[oldPrefix];
d->panels.remove(oldPrefix);
}
d->location = Floating;
}
bool PanelSvg::hasElementPrefix(const QString & prefix) const
{
//for now it simply checks if a center element exists,
//because it could make sense for certain themes to not have all the elements
if (prefix.isEmpty()) {
return hasElement("center");
} else {
return hasElement(prefix + "-center");
}
}
bool PanelSvg::hasElementPrefix(Plasma::Location location) const
{
switch (location) {
case TopEdge:
return hasElementPrefix("north");
break;
case BottomEdge:
return hasElementPrefix("south");
break;
case LeftEdge:
return hasElementPrefix("west");
break;
case RightEdge:
return hasElementPrefix("east");
break;
default:
return hasElementPrefix(QString());
break;
}
}
QString PanelSvg::prefix()
{
if (d->prefix.isEmpty()) {
return d->prefix;
}
return d->prefix.left(d->prefix.size() - 1);
}
void PanelSvg::resizePanel(const QSizeF& size)
{
if (size.isEmpty()) {
kWarning() << "Invalid size" << size;
return;
}
if (size == d->panels[d->prefix]->panelSize) {
return;
}
d->updateSizes();
d->panels[d->prefix]->panelSize = size;
}
QSizeF PanelSvg::panelSize() const
{
QHash<QString, PanelData*>::const_iterator it = d->panels.constFind(d->prefix);
if (it != d->panels.constEnd()) {
return it.value()->panelSize;
} else {
return QSize(-1, -1);
}
}
qreal PanelSvg::marginSize(const Plasma::MarginEdge edge) const
{
if (d->panels[d->prefix]->noBorderPadding) {
return .0;
}
switch (edge) {
case Plasma::TopMargin:
return d->panels[d->prefix]->topMargin;
break;
case Plasma::LeftMargin:
return d->panels[d->prefix]->leftMargin;
break;
case Plasma::RightMargin:
return d->panels[d->prefix]->rightMargin;
break;
//Plasma::BottomMargin
default:
return d->panels[d->prefix]->bottomMargin;
break;
}
}
void PanelSvg::getMargins(qreal &left, qreal &top, qreal &right, qreal &bottom) const
{
PanelData *panel = d->panels[d->prefix];
if (!panel || panel->noBorderPadding) {
left = top = right = bottom = 0;
return;
}
top = panel->topMargin;
left = panel->leftMargin;
right = panel->rightMargin;
bottom = panel->bottomMargin;
}
QRectF PanelSvg::contentsRect() const
{
QSizeF size(panelSize());
if (size.isValid()) {
QRectF rect(QPointF(0, 0), size);
PanelData *panel = d->panels[d->prefix];
return rect.adjusted(panel->leftMargin, panel->topMargin, -panel->rightMargin, -panel->bottomMargin);
} else {
return QRectF();
}
}
QBitmap PanelSvg::mask() const
{
PanelData *panel = d->panels[d->prefix];
if (!panel->cachedBackground) {
d->generateBackground(panel);
Q_ASSERT(panel->cachedBackground);
}
return panel->cachedBackground->alphaChannel().createMaskFromColor(Qt::black);
}
void PanelSvg::setCacheAllRenderedPanels(bool cache)
{
if (d->cacheAll && !cache) {
clearCache();
}
d->cacheAll = cache;
}
bool PanelSvg::cacheAllRenderedPanels() const
{
return d->cacheAll;
}
void PanelSvg::clearCache()
{
PanelData *panel = d->panels[d->prefix];
// delete all the panels that aren't this one
QMutableHashIterator<QString, PanelData*> it(d->panels);
while (it.hasNext()) {
PanelData *p = it.next().value();
if (panel != p) {
delete p;
it.remove();
}
}
}
void PanelSvg::paintPanel(QPainter* painter, const QRectF& target, const QRectF& source)
{
PanelData *panel = d->panels[d->prefix];
if (!panel->cachedBackground) {
d->generateBackground(panel);
Q_ASSERT(panel->cachedBackground);
}
painter->drawPixmap(target, *(panel->cachedBackground), source);
}
void PanelSvg::paintPanel(QPainter* painter, const QPointF& pos)
{
PanelData *panel = d->panels[d->prefix];
if (!panel->cachedBackground) {
d->generateBackground(panel);
Q_ASSERT(panel->cachedBackground);
}
painter->drawPixmap(pos, *(panel->cachedBackground));
}
void PanelSvgPrivate::generateBackground(PanelData *panel)
{
//kDebug() << "generating background";
const int topWidth = q->elementSize(prefix + "top").width();
const int leftHeight = q->elementSize(prefix + "left").height();
const int topOffset = 0;
const int leftOffset = 0;
if (panel->cachedBackground) {
return;
}
if (!panel->panelSize.isValid()) {
kWarning() << "Invalid panel size" << panel->panelSize;
panel->cachedBackground = new QPixmap();
return;
}
const int contentWidth = panel->panelSize.width() - panel->leftWidth - panel->rightWidth;
const int contentHeight = panel->panelSize.height() - panel->topHeight - panel->bottomHeight;
int contentTop = 0;
int contentLeft = 0;
int rightOffset = contentWidth;
int bottomOffset = contentHeight;
panel->cachedBackground = new QPixmap(panel->leftWidth + contentWidth + panel->rightWidth,
panel->topHeight + contentHeight + panel->bottomHeight);
panel->cachedBackground->fill(Qt::transparent);
QPainter p(panel->cachedBackground);
p.setCompositionMode(QPainter::CompositionMode_Source);
p.setRenderHint(QPainter::SmoothPixmapTransform);
//if we must stretch the center or the borders we compute how much we will have to stretch
//the svg to get the desired element sizes
QSizeF scaledContentSize(0,0);
if (q->elementSize(prefix + "center").width() > 0 &&
q->elementSize(prefix + "center").height() > 0 &&
(!panel->tileCenter || panel->stretchBorders)) {
scaledContentSize = QSizeF(contentWidth * ((qreal)q->size().width() / (qreal)q->elementSize(prefix + "center").width()),
contentHeight * ((qreal)q->size().height() / (qreal)q->elementSize(prefix + "center").height()));
}
//CENTER
if (panel->tileCenter) {
if (contentHeight > 0 && contentWidth > 0) {
int centerTileHeight;
int centerTileWidth;
centerTileHeight = q->elementSize(prefix + "center").height();
centerTileWidth = q->elementSize(prefix + "center").width();
QPixmap center(centerTileWidth, centerTileHeight);
center.fill(Qt::transparent);
{
QPainter centerPainter(&center);
centerPainter.setCompositionMode(QPainter::CompositionMode_Source);
q->paint(&centerPainter, QPoint(0, 0), prefix + "center");
}
p.drawTiledPixmap(QRect(panel->leftWidth, panel->topHeight,
contentWidth, contentHeight), center);
}
} else {
if (contentHeight > 0 && contentWidth > 0) {
q->resize(scaledContentSize);
q->paint(&p, QRect(panel->leftWidth, panel->topHeight,
contentWidth, contentHeight),
prefix + "center");
q->resize();
}
}
// Corners
if (q->hasElement(prefix + "top") && panel->enabledBorders & PanelSvg::TopBorder) {
contentTop = panel->topHeight;
bottomOffset += panel->topHeight;
if (q->hasElement(prefix + "topleft") && panel->enabledBorders & PanelSvg::LeftBorder) {
q->paint(&p, QRect(leftOffset, topOffset, panel->leftWidth, panel->topHeight), prefix + "topleft");
contentLeft = panel->leftWidth;
rightOffset = contentWidth + panel->leftWidth;
}
if (q->hasElement(prefix + "topright") && panel->enabledBorders & PanelSvg::RightBorder) {
q->paint(&p, QRect(rightOffset, topOffset, panel->rightWidth, panel->topHeight), prefix + "topright");
}
}
if (q->hasElement(prefix + "bottom") && panel->enabledBorders & PanelSvg::BottomBorder) {
if (q->hasElement(prefix + "bottomleft") && panel->enabledBorders & PanelSvg::LeftBorder) {
q->paint(&p, QRect(leftOffset, bottomOffset, panel->leftWidth, panel->bottomHeight), prefix + "bottomleft");
contentLeft = panel->leftWidth;
rightOffset = contentWidth + panel->leftWidth;
}
if (q->hasElement(prefix + "bottomright") && panel->enabledBorders & PanelSvg::RightBorder) {
q->paint(&p, QRect(rightOffset, bottomOffset, panel->rightWidth, panel->bottomHeight), prefix + "bottomright");
}
}
// Sides
if (panel->stretchBorders) {
if (panel->enabledBorders & PanelSvg::LeftBorder || panel->enabledBorders & PanelSvg::RightBorder) {
q->resize(q->size().width(), scaledContentSize.height());
if (q->hasElement(prefix + "left") && panel->enabledBorders & PanelSvg::LeftBorder) {
q->paint(&p, QRect(leftOffset, contentTop, panel->leftWidth, contentHeight), prefix + "left");
}
if (q->hasElement(prefix + "right") && panel->enabledBorders & PanelSvg::RightBorder) {
q->paint(&p, QRect(rightOffset, contentTop, panel->rightWidth, contentHeight), prefix + "right");
}
q->resize();
}
if (panel->enabledBorders & PanelSvg::TopBorder || panel->enabledBorders & PanelSvg::BottomBorder) {
q->resize(scaledContentSize.width(), q->size().height());
if (q->hasElement(prefix + "top") && panel->enabledBorders & PanelSvg::TopBorder) {
q->paint(&p, QRect(contentLeft, topOffset, contentWidth, panel->topHeight), prefix + "top");
}
if (q->hasElement(prefix + "bottom") && panel->enabledBorders & PanelSvg::BottomBorder) {
q->paint(&p, QRect(contentLeft, bottomOffset, contentWidth, panel->bottomHeight), prefix + "bottom");
}
q->resize();
}
} else {
if (q->hasElement(prefix + "left") && panel->enabledBorders & PanelSvg::LeftBorder) {
QPixmap left(panel->leftWidth, leftHeight);
left.fill(Qt::transparent);
QPainter sidePainter(&left);
sidePainter.setCompositionMode(QPainter::CompositionMode_Source);
q->paint(&sidePainter, QPoint(0, 0), prefix + "left");
p.drawTiledPixmap(QRect(leftOffset, contentTop, panel->leftWidth, contentHeight), left);
}
if (q->hasElement(prefix + "right") && panel->enabledBorders & PanelSvg::RightBorder) {
QPixmap right(panel->rightWidth, leftHeight);
right.fill(Qt::transparent);
QPainter sidePainter(&right);
sidePainter.setCompositionMode(QPainter::CompositionMode_Source);
q->paint(&sidePainter, QPoint(0, 0), prefix + "right");
p.drawTiledPixmap(QRect(rightOffset, contentTop, panel->rightWidth, contentHeight), right);
}
if (q->hasElement(prefix + "top") && panel->enabledBorders & PanelSvg::TopBorder) {
QPixmap top(topWidth, panel->topHeight);
top.fill(Qt::transparent);
QPainter sidePainter(&top);
sidePainter.setCompositionMode(QPainter::CompositionMode_Source);
q->paint(&sidePainter, QPoint(0, 0), prefix + "top");
p.drawTiledPixmap(QRect(contentLeft, topOffset, contentWidth, panel->topHeight), top);
}
if (q->hasElement(prefix + "bottom") && panel->enabledBorders & PanelSvg::BottomBorder) {
QPixmap bottom(topWidth, panel->bottomHeight);
bottom.fill(Qt::transparent);
QPainter sidePainter(&bottom);
sidePainter.setCompositionMode(QPainter::CompositionMode_Source);
q->paint(&sidePainter, QPoint(0, 0), prefix + "bottom");
p.drawTiledPixmap(QRect(contentLeft, bottomOffset, contentWidth, panel->bottomHeight), bottom);
}
}
// re-enable this once Qt's svg rendering is un-buggered
//q->resize(contentWidth, contentHeight);
//paint(&p, QRect(contentLeft, contentTop, contentWidth, contentHeight), "center");
}
void PanelSvgPrivate::updateSizes()
{
//kDebug() << "!!!!!!!!!!!!!!!!!!!!!! updating sizes" << prefix;
PanelData *panel = panels[prefix];
Q_ASSERT(panel);
delete panel->cachedBackground;
panel->cachedBackground = 0;
q->Svg::resize();
if (panel->enabledBorders & PanelSvg::TopBorder) {
panel->topHeight = q->elementSize(prefix + "top").height();
if (q->hasElement(prefix + "hint-top-margin")) {
panel->topMargin = q->elementSize(prefix + "hint-top-margin").height();
} else {
panel->topMargin = panel->topHeight;
}
} else {
panel->topMargin = panel->topHeight = 0;
}
if (panel->enabledBorders & PanelSvg::LeftBorder) {
panel->leftWidth = q->elementSize(prefix + "left").width();
if (q->hasElement(prefix + "hint-left-margin")) {
panel->leftMargin = q->elementSize(prefix + "hint-left-margin").height();
} else {
panel->leftMargin = panel->leftWidth;
}
} else {
panel->leftMargin = panel->leftWidth = 0;
}
if (panel->enabledBorders & PanelSvg::RightBorder) {
panel->rightWidth = q->elementSize(prefix + "right").width();
if (q->hasElement(prefix + "hint-right-margin")) {
panel->rightMargin = q->elementSize(prefix + "hint-right-margin").height();
} else {
panel->rightMargin = panel->rightWidth;
}
} else {
panel->rightMargin = panel->rightWidth = 0;
}
if (panel->enabledBorders & PanelSvg::BottomBorder) {
panel->bottomHeight = q->elementSize(prefix + "bottom").height();
if (q->hasElement(prefix + "hint-bottom-margin")) {
panel->bottomMargin = q->elementSize(prefix + "hint-bottom-margin").height();
} else {
panel->bottomMargin = panel->bottomHeight;
}
} else {
panel->bottomMargin = panel->bottomHeight = 0;
}
//since it's rectangular, topWidth and bottomWidth must be the same
panel->tileCenter = q->hasElement("hint-tile-center");
panel->noBorderPadding = q->hasElement("hint-no-border-padding");
panel->stretchBorders = q->hasElement("hint-stretch-borders");
}
void PanelSvgPrivate::updateNeeded()
{
q->clearCache();
updateSizes();
}
void PanelSvgPrivate::updateAndSignalSizes()
{
updateSizes();
emit q->repaintNeeded();
}
} // Plasma namespace
#include "panelsvg.moc"