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Simplify fontsampler example by using the automatic tristate feature.

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All the features implemented here are done by QTreeWidget, which also
sets PartiallyChecked when appropriate.

Change-Id: I8c8b515478708d1b7a853e7b8d963dd8fc9863fb
Reviewed-by: Jarek Kobus <jaroslaw.kobus@theqtcompany.com>
This commit is contained in:
David Faure 2015-01-20 13:56:58 +01:00
parent dd23d9f161
commit b65a415e67
1 changed files with 1 additions and 40 deletions
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41
examples/widgets/painting/fontsampler/mainwindow.cpp
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@ -80,6 +80,7 @@ void MainWindow::setupFontTree()
QTreeWidgetItem *familyItem = new QTreeWidgetItem(fontTree);
familyItem->setText(0, family);
familyItem->setCheckState(0, Qt::Unchecked);
familyItem->setFlags(familyItem->flags() | Qt::ItemIsTristate);
foreach (QString style, styles) {
QTreeWidgetItem *styleItem = new QTreeWidgetItem(familyItem);
@ -169,51 +170,11 @@ void MainWindow::updateStyles(QTreeWidgetItem *item, int column)
QTreeWidgetItem *parent = item->parent();
if (parent) {
// Only count style items.
if (state == Qt::Checked)
++markedCount;
else
--markedCount;
if (state == Qt::Checked && parent->checkState(0) == Qt::Unchecked) {
// Mark parent items when child items are checked.
parent->setCheckState(0, Qt::Checked);
} else if (state == Qt::Unchecked && parent->checkState(0) == Qt::Checked) {
bool marked = false;
for (int row = 0; row < parent->childCount(); ++row) {
if (parent->child(row)->checkState(0) == Qt::Checked) {
marked = true;
break;
}
}
// Unmark parent items when all child items are unchecked.
if (!marked)
parent->setCheckState(0, Qt::Unchecked);
}
} else {
int row;
int number = 0;
for (row = 0; row < item->childCount(); ++row) {
if (item->child(row)->checkState(0) == Qt::Checked)
++number;
}
// Mark/unmark all child items when marking/unmarking top-level
// items.
if (state == Qt::Checked && number == 0) {
for (row = 0; row < item->childCount(); ++row) {
if (item->child(row)->checkState(0) == Qt::Unchecked)
item->child(row)->setCheckState(0, Qt::Checked);
}
} else if (state == Qt::Unchecked && number > 0) {
for (row = 0; row < item->childCount(); ++row) {
if (item->child(row)->checkState(0) == Qt::Checked)
item->child(row)->setCheckState(0, Qt::Unchecked);
}
}
}
printAction->setEnabled(markedCount > 0);