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
+}