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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:
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**
** 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 "previewdialog.h"
PreviewDialog::PreviewDialog(QPrinter &printer, QWidget *parent)
: QDialog(parent), printer(printer)
{
setupUi(this);
currentPage = 0;
pageCount = 0;
pageList->setIconSize(QSize(SmallPreviewLength, SmallPreviewLength));
pageList->header()->hide();
previewLabel = new PreviewLabel;
previewArea->setWidget(previewLabel);
setupComboBoxes();
buttonBox->button(QDialogButtonBox::Ok)->setText(tr("&Print"));
}
void PreviewDialog::setupComboBoxes()
{
paperSizeCombo->addItem(tr("A0 (841 x 1189 mm)"), QPrinter::A0);
paperSizeCombo->addItem(tr("A1 (594 x 841 mm)"), QPrinter::A1);
paperSizeCombo->addItem(tr("A2 (420 x 594 mm)"), QPrinter::A2);
paperSizeCombo->addItem(tr("A3 (297 x 420 mm)"), QPrinter::A3);
paperSizeCombo->addItem(tr("A4 (210 x 297 mm, 8.26 x 11.7 inches)"), QPrinter::A4);
paperSizeCombo->addItem(tr("A5 (148 x 210 mm)"), QPrinter::A5);
paperSizeCombo->addItem(tr("A6 (105 x 148 mm)"), QPrinter::A6);
paperSizeCombo->addItem(tr("A7 (74 x 105 mm)"), QPrinter::A7);
paperSizeCombo->addItem(tr("A8 (52 x 74 mm)"), QPrinter::A8);
paperSizeCombo->addItem(tr("A9 (37 x 52 mm)"), QPrinter::A9);
paperSizeCombo->addItem(tr("B0 (1000 x 1414 mm)"), QPrinter::B0);
paperSizeCombo->addItem(tr("B1 (707 x 1000 mm)"), QPrinter::B1);
paperSizeCombo->addItem(tr("B2 (500 x 707 mm)"), QPrinter::B2);
paperSizeCombo->addItem(tr("B3 (353 x 500 mm)"), QPrinter::B3);
paperSizeCombo->addItem(tr("B4 (250 x 353 mm)"), QPrinter::B4);
paperSizeCombo->addItem(tr("B5 (176 x 250 mm, 6.93 x 9.84 inches)"), QPrinter::B5);
paperSizeCombo->addItem(tr("B6 (125 x 176 mm)"), QPrinter::B6);
paperSizeCombo->addItem(tr("B7 (88 x 125 mm)"), QPrinter::B7);
paperSizeCombo->addItem(tr("B8 (62 x 88 mm)"), QPrinter::B8);
paperSizeCombo->addItem(tr("B9 (44 x 62 mm)"), QPrinter::B9);
paperSizeCombo->addItem(tr("B10 (31 x 44 mm)"), QPrinter::B10);
paperSizeCombo->addItem(tr("C5E (163 x 229 mm)"), QPrinter::C5E);
paperSizeCombo->addItem(tr("DLE (110 x 220 mm)"), QPrinter::DLE);
paperSizeCombo->addItem(tr("Executive (7.5 x 10 inches, 191 x 254 mm)"), QPrinter::Executive);
paperSizeCombo->addItem(tr("Folio (210 x 330 mm)"), QPrinter::Folio);
paperSizeCombo->addItem(tr("Ledger (432 x 279 mm)"), QPrinter::Ledger);
paperSizeCombo->addItem(tr("Legal (8.5 x 14 inches, 216 x 356 mm)"), QPrinter::Legal);
paperSizeCombo->addItem(tr("Letter (8.5 x 11 inches, 216 x 279 mm)"), QPrinter::Letter);
paperSizeCombo->addItem(tr("Tabloid (279 x 432 mm)"), QPrinter::Tabloid);
paperSizeCombo->addItem(tr("US Common #10 Envelope (105 x 241 mm)"), QPrinter::Comm10E);
paperSizeCombo->setCurrentIndex(paperSizeCombo->findData(QPrinter::A4));
paperOrientationCombo->addItem(tr("Portrait"), QPrinter::Portrait);
paperOrientationCombo->addItem(tr("Landscape"), QPrinter::Landscape);
}
void PreviewDialog::addPage()
{
if (currentPage >= pageCount)
return;
QTreeWidgetItem *item = new QTreeWidgetItem(pageList);
item->setCheckState(0, Qt::Checked);
paintItem(item, currentPage);
if (pageList->indexOfTopLevelItem(pageList->currentItem()) < 0)
pageList->setCurrentItem(pageList->topLevelItem(0));
qApp->processEvents();
++currentPage;
QTimer::singleShot(0, this, SLOT(addPage()));
}
void PreviewDialog::setNumberOfPages(int count)
{
pageCount = count;
QTimer::singleShot(0, this, SLOT(addPage()));
}
void PreviewDialog::paintItem(QTreeWidgetItem *item, int index)
{
QPixmap pixmap(SmallPreviewLength, SmallPreviewLength);
paintPreview(pixmap, index);
item->setIcon(0, QIcon(pixmap));
}
void PreviewDialog::paintPreview(QPixmap &pixmap, int index)
{
qreal longestSide = qreal(qMax(printer.paperRect().width(),
printer.paperRect().height()));
qreal width = pixmap.width() * printer.paperRect().width()/longestSide;
qreal height = pixmap.height() * printer.paperRect().height()/longestSide;
pixmap.fill(qRgb(224,224,224));
QPainter painter;
painter.begin(&pixmap);
painter.setRenderHint(QPainter::Antialiasing);
painter.translate((pixmap.width() - width)/2,
(pixmap.height() - height)/2);
painter.fillRect(QRectF(0, 0, width, height), QBrush(Qt::white));
painter.scale(pixmap.width() / longestSide, pixmap.height() / longestSide);
painter.translate(printer.pageRect().topLeft());
emit pageRequested(index, painter, printer);
painter.end();
}
void PreviewDialog::accept()
{
int markedPages = 0;
int pageIndex;
for (pageIndex = 0; pageIndex < pageList->topLevelItemCount(); ++pageIndex) {
if (pageList->topLevelItem(pageIndex)->checkState(0) == Qt::Checked)
++markedPages;
}
<span class="comment">// Print all pages that have yet to be previewed.</span>
markedPages += pageCount - pageIndex;
printer.setPageSize(QPrinter::PageSize(
paperSizeCombo->itemData(paperSizeCombo->currentIndex()).toInt()));
printer.setOrientation(QPrinter::Orientation(
paperOrientationCombo->itemData(
paperOrientationCombo->currentIndex()).toInt()));
QPrintDialog dialog(&printer, this);
if (dialog.exec() != QDialog::Accepted)
return;
progressBar->setMaximum(markedPages);
progressBar->setEnabled(true);
progressBar->setTextVisible(true);
QPainter painter;
painter.begin(&printer);
canceled = false;
int printed = 0;
bool firstPage = true;
for (pageIndex = 0; pageIndex < pageCount; ++pageIndex) {
qApp->processEvents();
if (canceled)
break;
if (pageIndex >= currentPage || isSelected(pageIndex)) {
<span class="comment">// Print all pages that are either marked or have yet to be</span>
<span class="comment">// previewed.</span>
if (!firstPage)
printer.newPage();
emit pageRequested(pageIndex, painter, printer);
progressBar->setValue(++printed);
firstPage = false;
}
}
painter.end();
progressBar->setTextVisible(false);
progressBar->setEnabled(false);
QDialog::accept();
}
bool PreviewDialog::isSelected(int index)
{
if (index >= 0 && index < pageList->topLevelItemCount())
return (pageList->topLevelItem(index)->checkState(0) == Qt::Checked);
else
return false;
}
void PreviewDialog::reject()
{
canceled = true;
QDialog::reject();
}
void PreviewDialog::resizeEvent(QResizeEvent *)
{
int size = qMax(qMin(previewArea->width() - previewArea->verticalScrollBar()->width(),
previewArea->height() - previewArea->horizontalScrollBar()->height()),
int(LargePreviewLength));
previewLabel->resize(size, size);
on_pageList_currentItemChanged();
}
void PreviewDialog::on_pageList_currentItemChanged()
{
if (pageList->indexOfTopLevelItem(pageList->currentItem()) < 0)
return;
QPixmap pixmap(previewLabel->size());
paintPreview(pixmap, pageList->indexOfTopLevelItem(pageList->currentItem()));
previewLabel->setPixmap(pixmap);
previewLabel->update();
}
void PreviewDialog::on_paperSizeCombo_activated(int index)
{
printer.setPageSize(QPrinter::PageSize(paperSizeCombo->itemData(index).toInt()));
for (index = 0; index < pageList->topLevelItemCount(); ++index)
paintItem(pageList->topLevelItem(index), index);
on_pageList_currentItemChanged();
}
void PreviewDialog::on_paperOrientationCombo_activated(int index)
{
printer.setOrientation(QPrinter::Orientation(paperOrientationCombo->itemData(index).toInt()));
for (index = 0; index < pageList->topLevelItemCount(); ++index)
paintItem(pageList->topLevelItem(index), index);
on_pageList_currentItemChanged();
}</pre>
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