plasma-framework/framesvg.cpp
Aaron J. Seigo 9edf9c2ac0 do the cheap check first
svn path=/trunk/KDE/kdelibs/; revision=894561
2008-12-08 21:31:13 +00:00

700 lines
20 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 "framesvg.h"
#include <QPainter>
#include <QSize>
#include <QBitmap>
#include <QTimer>
#include <kdebug.h>
#include <plasma/theme.h>
namespace Plasma
{
class FrameData
{
public:
FrameData()
: enabledBorders(FrameSvg::AllBorders),
frameSize(-1,-1)
{
}
FrameData(const FrameData &other)
: enabledBorders(other.enabledBorders),
frameSize(other.frameSize)
{
}
~FrameData()
{
}
FrameSvg::EnabledBorders enabledBorders;
QPixmap cachedBackground;
QBitmap cachedMask;
QSizeF frameSize;
//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 FrameSvgPrivate
{
public:
FrameSvgPrivate(FrameSvg *psvg)
: q(psvg),
cacheAll(false),
saveTimer(0)
{
}
~FrameSvgPrivate()
{
qDeleteAll(frames);
frames.clear();
}
void generateBackground(FrameData *frame);
void scheduledCacheUpdate();
void updateSizes();
void updateNeeded();
void updateAndSignalSizes();
Location location;
QString prefix;
FrameSvg *q;
bool cacheAll : 1;
QStringList framesToSave;
QTimer *saveTimer;
QHash<QString, FrameData*> frames;
};
FrameSvg::FrameSvg(QObject *parent)
: Svg(parent),
d(new FrameSvgPrivate(this))
{
connect(this, SIGNAL(repaintNeeded()), this, SLOT(updateNeeded()));
d->frames.insert(QString(), new FrameData());
d->saveTimer = new QTimer(this);
d->saveTimer->setSingleShot(true);
connect(d->saveTimer, SIGNAL(timeout()), this, SLOT(scheduledCacheUpdate()));
}
FrameSvg::~FrameSvg()
{
delete d;
}
void FrameSvg::setImagePath(const QString &path)
{
if (path == imagePath()) {
return;
}
Svg::setImagePath(path);
setContainsMultipleImages(true);
clearCache();
d->updateAndSignalSizes();
}
void FrameSvg::setEnabledBorders(const EnabledBorders borders)
{
if (borders == d->frames[d->prefix]->enabledBorders) {
return;
}
d->frames[d->prefix]->enabledBorders = borders;
d->updateAndSignalSizes();
}
FrameSvg::EnabledBorders FrameSvg::enabledBorders() const
{
QHash<QString, FrameData*>::const_iterator it = d->frames.constFind(d->prefix);
if (it != d->frames.constEnd()) {
return it.value()->enabledBorders;
} else {
return NoBorder;
}
}
void FrameSvg::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 FrameSvg::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->frames[oldPrefix]) {
return;
}
if (!d->frames.contains(d->prefix)) {
d->frames.insert(d->prefix, new FrameData(*(d->frames[oldPrefix])));
d->updateSizes();
}
if (!d->cacheAll) {
delete d->frames[oldPrefix];
d->framesToSave.removeAll(oldPrefix);
d->frames.remove(oldPrefix);
}
d->location = Floating;
}
bool FrameSvg::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 FrameSvg::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 FrameSvg::prefix()
{
if (d->prefix.isEmpty()) {
return d->prefix;
}
return d->prefix.left(d->prefix.size() - 1);
}
void FrameSvg::resizeFrame(const QSizeF &size)
{
if (size.isEmpty()) {
kWarning() << "Invalid size" << size;
return;
}
if (size == d->frames[d->prefix]->frameSize) {
return;
}
d->updateSizes();
d->frames[d->prefix]->frameSize = size;
}
QSizeF FrameSvg::frameSize() const
{
QHash<QString, FrameData*>::const_iterator it = d->frames.constFind(d->prefix);
if (it != d->frames.constEnd()) {
return it.value()->frameSize;
} else {
return QSize(-1, -1);
}
}
qreal FrameSvg::marginSize(const Plasma::MarginEdge edge) const
{
if (d->frames[d->prefix]->noBorderPadding) {
return .0;
}
switch (edge) {
case Plasma::TopMargin:
return d->frames[d->prefix]->topMargin;
break;
case Plasma::LeftMargin:
return d->frames[d->prefix]->leftMargin;
break;
case Plasma::RightMargin:
return d->frames[d->prefix]->rightMargin;
break;
//Plasma::BottomMargin
default:
return d->frames[d->prefix]->bottomMargin;
break;
}
}
void FrameSvg::getMargins(qreal &left, qreal &top, qreal &right, qreal &bottom) const
{
FrameData *frame = d->frames[d->prefix];
if (!frame || frame->noBorderPadding) {
left = top = right = bottom = 0;
return;
}
top = frame->topMargin;
left = frame->leftMargin;
right = frame->rightMargin;
bottom = frame->bottomMargin;
}
QRectF FrameSvg::contentsRect() const
{
QSizeF size(frameSize());
if (size.isValid()) {
QRectF rect(QPointF(0, 0), size);
FrameData *frame = d->frames[d->prefix];
return rect.adjusted(frame->leftMargin, frame->topMargin,
-frame->rightMargin, -frame->bottomMargin);
} else {
return QRectF();
}
}
QBitmap FrameSvg::mask() const
{
FrameData *frame = d->frames[d->prefix];
if (!frame->cachedMask) {
if (frame->cachedBackground.isNull()) {
d->generateBackground(frame);
if (frame->cachedBackground.isNull()) {
return QBitmap();
}
}
frame->cachedMask = QBitmap(frame->cachedBackground.alphaChannel().createMaskFromColor(Qt::black));
}
return frame->cachedMask;
}
void FrameSvg::setCacheAllRenderedFrames(bool cache)
{
if (d->cacheAll && !cache) {
clearCache();
}
d->cacheAll = cache;
}
bool FrameSvg::cacheAllRenderedFrames() const
{
return d->cacheAll;
}
void FrameSvg::clearCache()
{
FrameData *frame = d->frames[d->prefix];
// delete all the frames that aren't this one
QMutableHashIterator<QString, FrameData*> it(d->frames);
while (it.hasNext()) {
FrameData *p = it.next().value();
if (frame != p) {
delete p;
it.remove();
}
}
}
QPixmap FrameSvg::framePixmap()
{
FrameData *frame = d->frames[d->prefix];
if (frame->cachedBackground.isNull()) {
d->generateBackground(frame);
if (frame->cachedBackground.isNull()) {
return QPixmap();
}
}
return frame->cachedBackground;
}
void FrameSvg::paintFrame(QPainter *painter, const QRectF &target, const QRectF &source)
{
FrameData *frame = d->frames[d->prefix];
if (frame->cachedBackground.isNull()) {
d->generateBackground(frame);
if (frame->cachedBackground.isNull()) {
return;
}
}
painter->drawPixmap(target, frame->cachedBackground, source.isValid() ? source : target);
}
void FrameSvg::paintFrame(QPainter *painter, const QPointF &pos)
{
FrameData *frame = d->frames[d->prefix];
if (frame->cachedBackground.isNull()) {
d->generateBackground(frame);
if (frame->cachedBackground.isNull()) {
return;
}
}
painter->drawPixmap(pos, frame->cachedBackground);
}
void FrameSvgPrivate::generateBackground(FrameData *frame)
{
if (!frame->cachedBackground.isNull()) {
return;
}
QString id = QString::fromLatin1("%5_%4_%3_%2_%1_").
arg(frame->enabledBorders).arg(frame->frameSize.width()).arg(frame->frameSize.height()).arg(prefix).arg(q->imagePath());
Theme *theme = Theme::defaultTheme();
if (theme->findInCache(id, frame->cachedBackground) && !frame->cachedBackground.isNull()) {
return;
}
//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 (!frame->frameSize.isValid()) {
kWarning() << "Invalid frame size" << frame->frameSize;
return;
}
const int contentWidth = frame->frameSize.width() - frame->leftWidth - frame->rightWidth;
const int contentHeight = frame->frameSize.height() - frame->topHeight - frame->bottomHeight;
int contentTop = 0;
int contentLeft = 0;
int rightOffset = contentWidth;
int bottomOffset = contentHeight;
frame->cachedBackground = QPixmap(frame->leftWidth + contentWidth + frame->rightWidth,
frame->topHeight + contentHeight + frame->bottomHeight);
frame->cachedBackground.fill(Qt::transparent);
QPainter p(&frame->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 &&
(!frame->tileCenter || frame->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 (frame->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, QRect(QPoint(0, 0), q->elementSize(prefix + "center")), prefix + "center");
}
p.drawTiledPixmap(QRect(frame->leftWidth, frame->topHeight,
contentWidth, contentHeight), center);
}
} else {
if (contentHeight > 0 && contentWidth > 0) {
q->paint(&p, QRect(frame->leftWidth, frame->topHeight,
contentWidth, contentHeight),
prefix + "center");
}
}
// Corners
if (frame->enabledBorders & FrameSvg::TopBorder && q->hasElement(prefix + "top")) {
contentTop = frame->topHeight;
bottomOffset += frame->topHeight;
if (q->hasElement(prefix + "topleft") && frame->enabledBorders & FrameSvg::LeftBorder) {
q->paint(&p, QRect(leftOffset, topOffset, frame->leftWidth, frame->topHeight), prefix + "topleft");
contentLeft = frame->leftWidth;
rightOffset = contentWidth + frame->leftWidth;
}
if (q->hasElement(prefix + "topright") && frame->enabledBorders & FrameSvg::RightBorder) {
q->paint(&p, QRect(rightOffset, topOffset, frame->rightWidth, frame->topHeight), prefix + "topright");
}
}
if (frame->enabledBorders & FrameSvg::BottomBorder && q->hasElement(prefix + "bottom")) {
if (q->hasElement(prefix + "bottomleft") && frame->enabledBorders & FrameSvg::LeftBorder) {
q->paint(&p, QRect(leftOffset, bottomOffset, frame->leftWidth, frame->bottomHeight), prefix + "bottomleft");
contentLeft = frame->leftWidth;
rightOffset = contentWidth + frame->leftWidth;
}
if (frame->enabledBorders & FrameSvg::RightBorder && q->hasElement(prefix + "bottomright")) {
q->paint(&p, QRect(rightOffset, bottomOffset, frame->rightWidth, frame->bottomHeight), prefix + "bottomright");
}
}
// Sides
if (frame->stretchBorders) {
if (frame->enabledBorders & FrameSvg::LeftBorder || frame->enabledBorders & FrameSvg::RightBorder) {
if (q->hasElement(prefix + "left") &&
frame->enabledBorders & FrameSvg::LeftBorder) {
q->paint(&p, QRect(leftOffset, contentTop, frame->leftWidth, contentHeight), prefix + "left");
}
if (q->hasElement(prefix + "right") &&
frame->enabledBorders & FrameSvg::RightBorder) {
q->paint(&p, QRect(rightOffset, contentTop, frame->rightWidth, contentHeight), prefix + "right");
}
}
if (frame->enabledBorders & FrameSvg::TopBorder || frame->enabledBorders & FrameSvg::BottomBorder) {
if (frame->enabledBorders & FrameSvg::TopBorder && q->hasElement(prefix + "top")) {
q->paint(&p, QRect(contentLeft, topOffset, contentWidth, frame->topHeight), prefix + "top");
}
if (frame->enabledBorders & FrameSvg::BottomBorder && q->hasElement(prefix + "bottom")) {
q->paint(&p, QRect(contentLeft, bottomOffset, contentWidth, frame->bottomHeight), prefix + "bottom");
}
}
} else {
if (frame->enabledBorders & FrameSvg::LeftBorder && q->hasElement(prefix + "left")) {
QPixmap left(frame->leftWidth, leftHeight);
left.fill(Qt::transparent);
QPainter sidePainter(&left);
sidePainter.setCompositionMode(QPainter::CompositionMode_Source);
q->paint(&sidePainter, QRect(QPoint(0, 0), left.size()), prefix + "left");
p.drawTiledPixmap(QRect(leftOffset, contentTop, frame->leftWidth, contentHeight), left);
}
if (frame->enabledBorders & FrameSvg::RightBorder && q->hasElement(prefix + "right")) {
QPixmap right(frame->rightWidth, leftHeight);
right.fill(Qt::transparent);
QPainter sidePainter(&right);
sidePainter.setCompositionMode(QPainter::CompositionMode_Source);
q->paint(&sidePainter, QRect(QPoint(0, 0), right.size()), prefix + "right");
p.drawTiledPixmap(QRect(rightOffset, contentTop, frame->rightWidth, contentHeight), right);
}
if (frame->enabledBorders & FrameSvg::TopBorder && q->hasElement(prefix + "top")) {
QPixmap top(topWidth, frame->topHeight);
top.fill(Qt::transparent);
QPainter sidePainter(&top);
sidePainter.setCompositionMode(QPainter::CompositionMode_Source);
q->paint(&sidePainter, QRect(QPoint(0, 0), top.size()), prefix + "top");
p.drawTiledPixmap(QRect(contentLeft, topOffset, contentWidth, frame->topHeight), top);
}
if (frame->enabledBorders & FrameSvg::BottomBorder && q->hasElement(prefix + "bottom")) {
QPixmap bottom(topWidth, frame->bottomHeight);
bottom.fill(Qt::transparent);
QPainter sidePainter(&bottom);
sidePainter.setCompositionMode(QPainter::CompositionMode_Source);
q->paint(&sidePainter, QRect(QPoint(0, 0), bottom.size()), prefix + "bottom");
p.drawTiledPixmap(QRect(contentLeft, bottomOffset, contentWidth, frame->bottomHeight), bottom);
}
}
if (!framesToSave.contains(prefix)) {
framesToSave.append(prefix);
}
saveTimer->start(300);
}
void FrameSvgPrivate::scheduledCacheUpdate()
{
foreach ( QString prefixToSave, framesToSave) {
FrameData *frame = frames[prefix];
framesToSave.removeAll(prefixToSave);
QString id = QString::fromLatin1("%5_%4_%3_%2_%1_").
arg(frame->enabledBorders).arg(frame->frameSize.width()).arg(frame->frameSize.height()).arg(prefix).arg(q->imagePath());
//kDebug()<<"Saving to cache frame"<<id;
Theme::defaultTheme()->insertIntoCache(id, frame->cachedBackground);
}
}
void FrameSvgPrivate::updateSizes()
{
//kDebug() << "!!!!!!!!!!!!!!!!!!!!!! updating sizes" << prefix;
FrameData *frame = frames[prefix];
Q_ASSERT(frame);
frame->cachedBackground = QPixmap();
frame->cachedMask = QPixmap();
if (frame->enabledBorders & FrameSvg::TopBorder) {
frame->topHeight = q->elementSize(prefix + "top").height();
if (q->hasElement(prefix + "hint-top-margin")) {
frame->topMargin = q->elementSize(prefix + "hint-top-margin").height();
} else {
frame->topMargin = frame->topHeight;
}
} else {
frame->topMargin = frame->topHeight = 0;
}
if (frame->enabledBorders & FrameSvg::LeftBorder) {
frame->leftWidth = q->elementSize(prefix + "left").width();
if (q->hasElement(prefix + "hint-left-margin")) {
frame->leftMargin = q->elementSize(prefix + "hint-left-margin").height();
} else {
frame->leftMargin = frame->leftWidth;
}
} else {
frame->leftMargin = frame->leftWidth = 0;
}
if (frame->enabledBorders & FrameSvg::RightBorder) {
frame->rightWidth = q->elementSize(prefix + "right").width();
if (q->hasElement(prefix + "hint-right-margin")) {
frame->rightMargin = q->elementSize(prefix + "hint-right-margin").height();
} else {
frame->rightMargin = frame->rightWidth;
}
} else {
frame->rightMargin = frame->rightWidth = 0;
}
if (frame->enabledBorders & FrameSvg::BottomBorder) {
frame->bottomHeight = q->elementSize(prefix + "bottom").height();
if (q->hasElement(prefix + "hint-bottom-margin")) {
frame->bottomMargin = q->elementSize(prefix + "hint-bottom-margin").height();
} else {
frame->bottomMargin = frame->bottomHeight;
}
} else {
frame->bottomMargin = frame->bottomHeight = 0;
}
//since it's rectangular, topWidth and bottomWidth must be the same
frame->tileCenter = q->hasElement("hint-tile-center");
frame->noBorderPadding = q->hasElement("hint-no-border-padding");
frame->stretchBorders = q->hasElement("hint-stretch-borders");
}
void FrameSvgPrivate::updateNeeded()
{
q->clearCache();
updateSizes();
}
void FrameSvgPrivate::updateAndSignalSizes()
{
updateSizes();
emit q->repaintNeeded();
}
} // Plasma namespace
#include "framesvg.moc"