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<pre> /****************************************************************************
**
** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http:<span class="comment">//www.trolltech.com/products/qt/opensource.html</span>
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
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** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#include <QtGui>
#include "mainwindow.h"
#include "previewdialog.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
setupUi(this);
sampleSizes << 32 << 24 << 16 << 14 << 12 << 8 << 4 << 2 << 1;
markedCount = 0;
setupFontTree();
connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
connect(fontTree, SIGNAL(currentItemChanged(QTreeWidgetItem *, QTreeWidgetItem *)),
this, SLOT(showFont(QTreeWidgetItem *)));
connect(fontTree, SIGNAL(itemChanged(QTreeWidgetItem *, int)),
this, SLOT(updateStyles(QTreeWidgetItem *, int)));
fontTree->setItemSelected(fontTree->topLevelItem(0), true);
showFont(fontTree->topLevelItem(0));
}
void MainWindow::setupFontTree()
{
QFontDatabase database;
fontTree->setColumnCount(1);
fontTree->setHeaderLabels(QStringList() << tr("Font"));
foreach (QString family, database.families()) {
const QStringList styles = database.styles(family);
if (styles.isEmpty())
continue;
QTreeWidgetItem *familyItem = new QTreeWidgetItem(fontTree);
familyItem->setText(0, family);
familyItem->setCheckState(0, Qt::Unchecked);
foreach (QString style, styles) {
QTreeWidgetItem *styleItem = new QTreeWidgetItem(familyItem);
styleItem->setText(0, style);
styleItem->setCheckState(0, Qt::Unchecked);
styleItem->setData(0, Qt::UserRole,
QVariant(database.weight(family, style)));
styleItem->setData(0, Qt::UserRole + 1,
QVariant(database.italic(family, style)));
}
}
}
void MainWindow::on_clearAction_triggered()
{
QTreeWidgetItem *currentItem = fontTree->currentItem();
foreach (QTreeWidgetItem *item, fontTree->selectedItems())
fontTree->setItemSelected(item, false);
fontTree->setItemSelected(currentItem, true);
}
void MainWindow::on_markAction_triggered()
{
markUnmarkFonts(Qt::Checked);
}
void MainWindow::on_unmarkAction_triggered()
{
markUnmarkFonts(Qt::Unchecked);
}
void MainWindow::markUnmarkFonts(Qt::CheckState state)
{
QList<QTreeWidgetItem *> items = fontTree->selectedItems();
foreach (QTreeWidgetItem *item, items) {
if (item->checkState(0) != state)
item->setCheckState(0, state);
}
}
void MainWindow::showFont(QTreeWidgetItem *item)
{
if (!item)
return;
QString family;
QString style;
int weight;
bool italic;
if (item->parent()) {
family = item->parent()->text(0);
style = item->text(0);
weight = item->data(0, Qt::UserRole).toInt();
italic = item->data(0, Qt::UserRole + 1).toBool();
} else {
family = item->text(0);
style = item->child(0)->text(0);
weight = item->child(0)->data(0, Qt::UserRole).toInt();
italic = item->child(0)->data(0, Qt::UserRole + 1).toBool();
}
QString oldText = textEdit->toPlainText().trimmed();
bool modified = textEdit->document()->isModified();
textEdit->clear();
textEdit->document()->setDefaultFont(QFont(family, 32, weight, italic));
QTextCursor cursor = textEdit->textCursor();
QTextBlockFormat blockFormat;
blockFormat.setAlignment(Qt::AlignCenter);
cursor.insertBlock(blockFormat);
if (modified)
cursor.insertText(QString(oldText));
else
cursor.insertText(QString("%1 %2").arg(family).arg(style));
textEdit->document()->setModified(modified);
}
void MainWindow::updateStyles(QTreeWidgetItem *item, int column)
{
if (!item || column != 0)
return;
Qt::CheckState state = item->checkState(0);
QTreeWidgetItem *parent = item->parent();
if (parent) {
<span class="comment">// Only count style items.</span>
if (state == Qt::Checked)
++markedCount;
else
--markedCount;
if (state == Qt::Checked &&
parent->checkState(0) == Qt::Unchecked) {
<span class="comment">// Mark parent items when child items are checked.</span>
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;
}
}
<span class="comment">// Unmark parent items when all child items are unchecked.</span>
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;
}
<span class="comment">// Mark/unmark all child items when marking/unmarking top-level</span>
<span class="comment">// items.</span>
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);
printPreviewAction->setEnabled(markedCount > 0);
}
void MainWindow::on_printAction_triggered()
{
pageMap = currentPageMap();
if (pageMap.count() == 0)
return;
QPrinter printer(QPrinter::HighResolution);
if (!setupPrinter(printer))
return;
int from = printer.fromPage();
int to = printer.toPage();
if (from <= 0 && to <= 0) {
from = 1;
to = pageMap.keys().count();
}
QProgressDialog progress(tr("Printing font samples..."), tr("&Cancel"),
0, pageMap.count(), this);
progress.setWindowModality(Qt::ApplicationModal);
progress.setWindowTitle(tr("Printing"));
progress.setMinimum(from - 1);
progress.setMaximum(to);
QPainter painter;
painter.begin(&printer);
bool firstPage = true;
for (int index = from - 1; index < to; ++index) {
if (!firstPage)
printer.newPage();
qApp->processEvents();
if (progress.wasCanceled())
break;
printPage(index, painter, printer);
progress.setValue(index + 1);
firstPage = false;
}
painter.end();
}
void MainWindow::on_printPreviewAction_triggered()
{
pageMap = currentPageMap();
if (pageMap.count() == 0)
return;
QPrinter printer;
PreviewDialog preview(printer, this);
connect(&preview,
SIGNAL(pageRequested(int, QPainter &, QPrinter &)),
this, SLOT(printPage(int, QPainter &, QPrinter &)),
Qt::DirectConnection);
preview.setNumberOfPages(pageMap.keys().count());
preview.exec();
}
QMap<QString, StyleItems> MainWindow::currentPageMap()
{
QMap<QString, StyleItems> pageMap;
for (int row = 0; row < fontTree->topLevelItemCount(); ++row) {
QTreeWidgetItem *familyItem = fontTree->topLevelItem(row);
QString family;
if (familyItem->checkState(0) == Qt::Checked) {
family = familyItem->text(0);
pageMap[family] = StyleItems();
}
for (int childRow = 0; childRow < familyItem->childCount(); ++childRow) {
QTreeWidgetItem *styleItem = familyItem->child(childRow);
if (styleItem->checkState(0) == Qt::Checked)
pageMap[family].append(styleItem);
}
}
return pageMap;
}
bool MainWindow::setupPrinter(QPrinter &printer)
{
QPrintDialog dialog(&printer, this);
if (dialog.exec() == QDialog::Accepted)
return true;
else
return false;
}
void MainWindow::printPage(int index, QPainter &painter, QPrinter &printer)
{
QString family = pageMap.keys()[index];
StyleItems items = pageMap[family];
<span class="comment">// Find the dimensions of the text on each page.</span>
qreal width = 0.0;
qreal height = 0.0;
foreach (QTreeWidgetItem *item, items) {
QString style = item->text(0);
int weight = item->data(0, Qt::UserRole).toInt();
bool italic = item->data(0, Qt::UserRole + 1).toBool();
<span class="comment">// Calculate the maximum width and total height of the text.</span>
foreach (int size, sampleSizes) {
QFont font(family, size, weight, italic);
font = QFont(font, painter.device());
QFontMetricsF fontMetrics(font);
QRectF rect = fontMetrics.boundingRect(
QString("%1 %2").arg(family).arg(style));
width = qMax(rect.width(), width);
height += rect.height();
}
}
qreal xScale = printer.pageRect().width() / width;
qreal yScale = printer.pageRect().height() / height;
qreal scale = qMin(xScale, yScale);
qreal remainingHeight = printer.pageRect().height()/scale - height;
qreal spaceHeight = (remainingHeight/4.0) / (items.count() + 1);
qreal interLineHeight = (remainingHeight/4.0) / (sampleSizes.count() * items.count());
painter.save();
painter.translate(printer.pageRect().width()/2.0, printer.pageRect().height()/2.0);
painter.scale(scale, scale);
painter.setBrush(QBrush(Qt::black));
qreal x = -width/2.0;
qreal y = -height/2.0 - remainingHeight/4.0 + spaceHeight;
foreach (QTreeWidgetItem *item, items) {
QString style = item->text(0);
int weight = item->data(0, Qt::UserRole).toInt();
bool italic = item->data(0, Qt::UserRole + 1).toBool();
<span class="comment">// Draw each line of text.</span>
foreach (int size, sampleSizes) {
QFont font(family, size, weight, italic);
font = QFont(font, painter.device());
QFontMetricsF fontMetrics(font);
QRectF rect = fontMetrics.boundingRect(QString("%1 %2").arg(
font.family()).arg(style));
y += rect.height();
painter.setFont(font);
painter.drawText(QPointF(x, y),
QString("%1 %2").arg(family).arg(style));
y += interLineHeight;
}
y += spaceHeight;
}
painter.restore();
}</pre>
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