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- Improve item-view mouse over for Gtk+ style - when hovering, draw selection into a QPixmap and set painter's opacity before drawing image.

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- Workaround issue of sometimes having an item (in icon view) staying in mouse-over state, even though mouse has left view.
This commit is contained in:
craig.p.drummond
2012-09-12 18:58:09 +00:00
committed by craig.p.drummond
parent 5412af31d1
commit 17828203ee
6 changed files with 138 additions and 34 deletions
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49
widgets/fancytabwidget.cpp
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@@ -46,6 +46,7 @@
#include <QtGui/QSplitter>
#include <QtGui/QStackedLayout>
#include <QtGui/QStyleOptionTabV3>
#include <QtGui/QStyleOptionViewItemV4>
#include <QtGui/QToolButton>
#include <QtGui/QToolTip>
#include <QtGui/QVBoxLayout>
@@ -61,30 +62,46 @@ static inline Qt::TextElideMode elideMode()
return Qt::LeftToRight==QApplication::layoutDirection() ? Qt::ElideRight : Qt::ElideLeft;
}
static inline bool isGtkStyle()
bool FancyTabWidget::isGtkStyle()
{
return QApplication::style()->inherits("QGtkStyle");
}
static void drawGtkSelection(const QStyleOptionViewItemV4 &opt, QPainter *painter, double fader)
void FancyTabWidget::drawGtkSelection(const QStyleOptionViewItemV4 &opt, QPainter *painter, double opacity)
{
static QCache<QString, QImage> cache(30000);
static const int constMaxDimension=32;
static QCache<QString, QPixmap> cache(30000);
QString key=QString::number(opt.rect.width())+QChar(':')+QString::number(opt.rect.height())+QChar(':');
QImage *img=cache.object(key);
int width=qMin(constMaxDimension, opt.rect.width());
QString key=QString::number(width)+QChar(':')+QString::number(opt.rect.height());
QPixmap *pix=cache.object(key);
if (!img) {
img=new QImage(opt.rect.width(), opt.rect.height(), QImage::Format_RGB32);
if (!pix) {
pix=new QPixmap(opt.rect.width(), opt.rect.height());
QStyleOptionViewItemV4 styleOpt(opt);
QPainter p(img);
styleOpt.rect=QRect(0, 0, styleOpt.rect.width(), styleOpt.rect.height());
pix->fill(Qt::transparent);
QPainter p(pix);
styleOpt.state=opt.state;
styleOpt.state&=~(QStyle::State_Selected|QStyle::State_MouseOver);
styleOpt.state|=QStyle::State_Selected|QStyle::State_Enabled|QStyle::State_Active;
styleOpt.viewItemPosition = QStyleOptionViewItemV4::OnlyOne;
styleOpt.rect=QRect(0, 0, opt.rect.width(), opt.rect.height());
QApplication::style()->drawPrimitive(QStyle::PE_PanelItemViewItem, &styleOpt, &p, 0);
p.end();
cache.insert(key, img, img->width()*img->height());
cache.insert(key, pix, pix->width()*pix->height());
}
double opacityB4=painter->opacity();
painter->setOpacity(fader/150.0);
painter->drawImage(opt.rect, *img);
painter->setOpacity(opacity);
if (opt.rect.width()>pix->width()) {
int half=qMin(opt.rect.width()>>1, pix->width()>>1);
painter->drawPixmap(opt.rect.x(), opt.rect.y(), pix->copy(0, 0, half, pix->height()));
if ((half*2)!=opt.rect.width()) {
painter->drawTiledPixmap(opt.rect.x()+half, opt.rect.y(), (opt.rect.width()-(2*half)), opt.rect.height(), pix->copy(half-1, 0, 1, pix->height()));
}
painter->drawPixmap((opt.rect.x()+opt.rect.width()-1)-half, opt.rect.y(), pix->copy(half-1, 0, half, pix->height()));
} else {
painter->drawPixmap(opt.rect, *pix);
}
painter->setOpacity(opacityB4);
}
@@ -248,8 +265,8 @@ void FancyTabProxyStyle::drawControl(
}
if (drawBgnd) {
if (!selected && isGtkStyle()) {
drawGtkSelection(styleOpt, p, fader*1.0);
if (!selected && FancyTabWidget::isGtkStyle()) {
FancyTabWidget::drawGtkSelection(styleOpt, p, (fader*1.0)/150.0);
} else {
QApplication::style()->drawPrimitive(QStyle::PE_PanelItemViewItem, &styleOpt, p, 0);
}
@@ -418,7 +435,7 @@ void FancyTabBar::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event)
QPainter p(this);
bool gtkStyle=isGtkStyle();
bool gtkStyle=FancyTabWidget::isGtkStyle();
for (int i = 0; i < count(); ++i)
if (i != currentIndex())
@@ -546,7 +563,7 @@ void FancyTabBar::paintTab(QPainter *painter, int tabIndex, bool gtkStyle) const
}
if (drawBgnd) {
if (!selected && gtkStyle) {
drawGtkSelection(styleOpt, painter, m_tabs[tabIndex]->fader());
FancyTabWidget::drawGtkSelection(styleOpt, painter, m_tabs[tabIndex]->fader()/150.0);
} else {
QApplication::style()->drawPrimitive(QStyle::PE_PanelItemViewItem, &styleOpt, painter, 0);
}