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only paint the part of the background that is needed; avoid creating lots of variables when we're using the cached version

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svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=738450
This commit is contained in:
Aaron J. Seigo 2007-11-18 22:46:46 +00:00
parent 5b4dbbe303
commit bcb4268c19
1 changed files with 26 additions and 25 deletions
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25
applet.cpp
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@ -178,7 +178,7 @@ public:
}
}
void paintBackground(QPainter* p2, Applet* q)
void paintBackground(QPainter* p2, Applet* q, QRectF paintRect)
{
if (q->formFactor() != Plasma::Planar) {
// we don't paint special backgrounds for other form factors
@ -187,31 +187,31 @@ public:
return;
}
// TODO: caching these values might be an idea
const int topHeight = background->elementSize("top").height();
const int leftWidth = background->elementSize("left").width();
const int topOffset = 0 - topHeight;
const int leftOffset = 0 - leftWidth;
if (!cachedBackground || cachedBackground->size() != q->boundingRect().toRect().size()) {
QSize contents = contentSize(q).toSize();
const int contentWidth = contents.width();
const int contentHeight = contents.height();
background->resize();
const int topHeight = background->elementSize("top").height();
const int topWidth = background->elementSize("top").width();
const int leftWidth = background->elementSize("left").width();
const int leftHeight = background->elementSize("left").height();
const int rightWidth = background->elementSize("right").width();
const int bottomHeight = background->elementSize("bottom").height();
//const int lrWidths = leftWidth + rightWidth;
//const int tbHeights = topHeight + bottomHeight;
// contents top-left corner is (0,0). We need to draw up and left of that
const int topOffset = 0 - topHeight;
const int leftOffset = 0 - leftWidth;
const int rightOffset = contentWidth;
const int bottomOffset = contentHeight;
const int contentTop = 0;
const int contentLeft = 0;
QSize s = QSize(leftWidth + contentWidth + rightWidth,
topHeight + contentHeight + bottomHeight);
if (!cachedBackground || cachedBackground->size() != s) {
delete cachedBackground;
cachedBackground = new QPixmap(leftWidth + contentWidth + rightWidth, topHeight + contentHeight + bottomHeight);
cachedBackground->fill(Qt::transparent);
@ -281,7 +281,7 @@ public:
//background->paint(&p, QRect(contentLeft, contentTop, contentWidth, contentHeight), "center");
}
p2->drawPixmap(leftOffset, topOffset, *cachedBackground);
p2->drawPixmap(paintRect, *cachedBackground, paintRect.translated(-leftOffset,-topOffset));
}
QSizeF contentSize(const Applet* q)
@ -792,7 +792,8 @@ void Applet::paintWidget(QPainter *painter, const QStyleOptionGraphicsItem *opti
//kDebug() << "qreal " << zoomLevel << " = " << painter->transform().m11() << " / " << transform().m11();
//if (fabs(zoomLevel - scalingFactor(Plasma::DesktopZoom)) < std::numeric_limits<double>::epsilon()) { // Show Desktop
if (d->background) {
d->paintBackground(painter, this);
//kDebug() << "option rect is" << option->rect;
d->paintBackground(painter, this, option->rect);
}
if (!d->failed && !d->needsConfig) {