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hover trumps mandatory; avoid doing unecessary work/allocations while we're at it

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svn path=/trunk/KDE/kdelibs/; revision=1046892
This commit is contained in:
Aaron J. Seigo 2009-11-09 22:13:55 +00:00
parent 748ef174b3
commit 53c10286b6
1 changed files with 33 additions and 27 deletions
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60
delegate.cpp
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@ -233,42 +233,18 @@ void Delegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
QString titleText = index.data(Qt::DisplayRole).value<QString>();
QString subTitleText = index.data(d->roles[SubTitleRole]).value<QString>();
//kDebug() << subTitleText;
QRect titleRect = d->titleRect(option, index);
titleRect.moveTopLeft(titleRect.topLeft()-option.rect.topLeft());
QRect subTitleRect = d->subTitleRect(option, index);
subTitleRect.moveTopLeft(subTitleRect.topLeft()-option.rect.topLeft());
// If the model wants to have exact control for subtitles showing
// it is expected to return a valid data for SubTitleMandatoryRole.
// If it doesn't return a valid data for this role
// then by default we well be showing a subtitles for
// adjasent items with the same content (see comments below too)
bool uniqueTitle = true;
QVariant mandatoryRoleData = index.data(d->roles[SubTitleMandatoryRole]);
if (!mandatoryRoleData.isValid()) {
uniqueTitle = !mandatoryRoleData.value<bool>();// true;
if (uniqueTitle) {
QModelIndex sib = index.sibling(index.row() + 1, index.column());
if (sib.isValid()) {
uniqueTitle = sib.data(Qt::DisplayRole).value<QString>() != titleText;
}
if (uniqueTitle) {
sib = index.sibling(index.row() + -1, index.column());
if (sib.isValid()) {
uniqueTitle = sib.data(Qt::DisplayRole).value<QString>() != titleText;
}
}
}
}
if (subTitleText == titleText) {
kDebug() << "clearing subtitle";
subTitleText.clear();
}
QFont subTitleFont = d->fontForSubTitle(option.font);
QFont titleFont(option.font);
// draw icon
@ -309,7 +285,35 @@ void Delegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
// required to understand the item itself and that showing all the subtexts in a
// listing makes the information density very high, impacting both the speed at
// which one can scan the list visually and the aesthetic qualities of the listing.
bool drawSubTitle = mandatoryRoleData.isValid() ? mandatoryRoleData.value<bool>() : (hover || !uniqueTitle);
bool drawSubTitle = !subTitleText.isEmpty();
if (drawSubTitle && !hover) {
// If the model wants to have exact control for subtitles showing
// it is expected to return a valid data for SubTitleMandatoryRole.
// If it doesn't return a valid data for this role
// then by default we well be showing a subtitles for
// adjasent items with the same content (see comments below too)
QVariant mandatoryRoleData = index.data(d->roles[SubTitleMandatoryRole]);
if (mandatoryRoleData.isValid()) {
drawSubTitle = mandatoryRoleData.value<bool>();
} else {
bool uniqueTitle = true;
QModelIndex sib = index.sibling(index.row() + 1, index.column());
if (sib.isValid()) {
uniqueTitle = sib.data(Qt::DisplayRole).value<QString>() != titleText;
}
if (uniqueTitle) {
sib = index.sibling(index.row() + -1, index.column());
if (sib.isValid()) {
uniqueTitle = sib.data(Qt::DisplayRole).value<QString>() != titleText;
}
}
drawSubTitle = !uniqueTitle;
}
}
if (drawSubTitle) {
if (option.palette.color(QPalette::Base).alpha() > 0) {
@ -319,6 +323,8 @@ void Delegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
textColor.setAlphaF(0.6);
p.setPen(textColor);
}
const QFont subTitleFont = d->fontForSubTitle(option.font);
p.setFont(subTitleFont);
p.drawText(subTitleRect, Qt::AlignLeft|Qt::AlignVCenter, " " + subTitleText);
}