diff options
Diffstat (limited to 'tests/manual/examples/widgets/painting/fontsampler/mainwindow.cpp')
-rw-r--r-- | tests/manual/examples/widgets/painting/fontsampler/mainwindow.cpp | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/painting/fontsampler/mainwindow.cpp b/tests/manual/examples/widgets/painting/fontsampler/mainwindow.cpp new file mode 100644 index 0000000000..e2bd768f79 --- /dev/null +++ b/tests/manual/examples/widgets/painting/fontsampler/mainwindow.cpp @@ -0,0 +1,314 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include <QtWidgets> +#if defined(QT_PRINTSUPPORT_LIB) +#include <QtPrintSupport/qtprintsupportglobal.h> +#if QT_CONFIG(printdialog) +#include <QPrinter> +#include <QPrintDialog> +#if QT_CONFIG(printpreviewdialog) +#include <QPrintPreviewDialog> +#endif +#endif +#endif + +#include "mainwindow.h" + +MainWindow::MainWindow(QWidget *parent) + : QMainWindow(parent) +{ + setupUi(this); + + sampleSizes << 32 << 24 << 16 << 14 << 12 << 8 << 4 << 2 << 1; + markedCount = 0; + setupFontTree(); + + connect(quitAction, &QAction::triggered, + qApp, &QApplication::quit); + connect(fontTree, &QTreeWidget::currentItemChanged, + this, &MainWindow::showFont); + connect(fontTree, &QTreeWidget::itemChanged, + this, &MainWindow::updateStyles); + + fontTree->topLevelItem(0)->setSelected(true); + showFont(fontTree->topLevelItem(0)); +} + +void MainWindow::setupFontTree() +{ + fontTree->setColumnCount(1); + fontTree->setHeaderLabels({ tr("Font") }); + + const QStringList fontFamilies = QFontDatabase::families(); + for (const QString &family : fontFamilies) { + const QStringList styles = QFontDatabase::styles(family); + if (styles.isEmpty()) + continue; + + QTreeWidgetItem *familyItem = new QTreeWidgetItem(fontTree); + familyItem->setText(0, family); + familyItem->setCheckState(0, Qt::Unchecked); + familyItem->setFlags(familyItem->flags() | Qt::ItemIsAutoTristate); + + for (const QString &style : styles) { + QTreeWidgetItem *styleItem = new QTreeWidgetItem(familyItem); + styleItem->setText(0, style); + styleItem->setCheckState(0, Qt::Unchecked); + styleItem->setData(0, Qt::UserRole, QVariant(QFontDatabase::weight(family, style))); + styleItem->setData(0, Qt::UserRole + 1, QVariant(QFontDatabase::italic(family, style))); + } + } +} + +void MainWindow::on_clearAction_triggered() +{ + const QList<QTreeWidgetItem *> items = fontTree->selectedItems(); + for (QTreeWidgetItem *item : items) + item->setSelected(false); + fontTree->currentItem()->setSelected(true); +} + +void MainWindow::on_markAction_triggered() +{ + markUnmarkFonts(Qt::Checked); +} + +void MainWindow::on_unmarkAction_triggered() +{ + markUnmarkFonts(Qt::Unchecked); +} + +void MainWindow::markUnmarkFonts(Qt::CheckState state) +{ + const QList<QTreeWidgetItem *> items = fontTree->selectedItems(); + for (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(); + QFont font(family, 32, weight, italic); + font.setStyleName(style); + textEdit->document()->setDefaultFont(font); + + 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) { + // Only count style items. + if (state == Qt::Checked) + ++markedCount; + else + --markedCount; + } + + printAction->setEnabled(markedCount > 0); + printPreviewAction->setEnabled(markedCount > 0); +} + +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; +} + +void MainWindow::on_printAction_triggered() +{ +#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog) + pageMap = currentPageMap(); + + if (pageMap.count() == 0) + return; + + QPrinter printer(QPrinter::HighResolution); + QPrintDialog dialog(&printer, this); + if (dialog.exec() != QDialog::Accepted) + return; + + int from = printer.fromPage(); + int to = printer.toPage(); + if (from <= 0 && to <= 0) + printer.setFromTo(1, pageMap.keys().count()); + + printDocument(&printer); +#endif +} + +void MainWindow::printDocument(QPrinter *printer) +{ +#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog) + printer->setFromTo(1, pageMap.count()); + + QProgressDialog progress(tr("Preparing font samples..."), tr("&Cancel"), + 0, pageMap.count(), this); + progress.setWindowModality(Qt::ApplicationModal); + progress.setWindowTitle(tr("Font Sampler")); + progress.setMinimum(printer->fromPage() - 1); + progress.setMaximum(printer->toPage()); + + QPainter painter; + painter.begin(printer); + bool firstPage = true; + + for (int page = printer->fromPage(); page <= printer->toPage(); ++page) { + + if (!firstPage) + printer->newPage(); + + qApp->processEvents(); + if (progress.wasCanceled()) + break; + + printPage(page - 1, &painter, printer); + progress.setValue(page); + firstPage = false; + } + + painter.end(); +#endif +} + +void MainWindow::on_printPreviewAction_triggered() +{ +#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printpreviewdialog) + pageMap = currentPageMap(); + + if (pageMap.count() == 0) + return; + + QPrinter printer(QPrinter::HighResolution); + QPrintPreviewDialog preview(&printer, this); + connect(&preview, &QPrintPreviewDialog::paintRequested, + this, &MainWindow::printDocument); + preview.exec(); +#endif +} + +void MainWindow::printPage(int index, QPainter *painter, QPrinter *printer) +{ +#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog) + const QString family = std::next(pageMap.begin(), index).key(); + const StyleItems items = pageMap.value(family); + + // Find the dimensions of the text on each page. + qreal width = 0.0; + qreal height = 0.0; + for (const 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(); + + // Calculate the maximum width and total height of the text. + for (int size : std::as_const(sampleSizes)) { + QFont font(family, size, weight, italic); + font.setStyleName(style); + 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(QPrinter::DevicePixel).width() / width; + qreal yScale = printer->pageRect(QPrinter::DevicePixel).height() / height; + qreal scale = qMin(xScale, yScale); + + qreal remainingHeight = printer->pageRect(QPrinter::DevicePixel).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(QPrinter::DevicePixel).width() / 2.0, printer->pageRect(QPrinter::DevicePixel).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; + + for (const 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(); + + // Draw each line of text. + for (int size : std::as_const(sampleSizes)) { + QFont font(family, size, weight, italic); + font.setStyleName(style); + 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(); +#endif +} |