1 files changed, 145 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/widgets/charactermap/characterwidget.cpp b/tests/manual/examples/widgets/widgets/charactermap/characterwidget.cpp
new file mode 100644
index 0000000000..6287a44e80
--- /dev/null
+++ b/tests/manual/examples/widgets/widgets/charactermap/characterwidget.cpp
@@ -0,0 +1,145 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "characterwidget.h"
+
+#include <QFontDatabase>
+#include <QMouseEvent>
+#include <QPainter>
+#include <QToolTip>
+
+//! [0]
+CharacterWidget::CharacterWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    calculateSquareSize();
+    setMouseTracking(true);
+}
+//! [0]
+
+//! [1]
+void CharacterWidget::updateFont(const QFont &font)
+{
+    displayFont.setFamily(font.family());
+    calculateSquareSize();
+    adjustSize();
+    update();
+}
+//! [1]
+
+//! [2]
+void CharacterWidget::updateSize(const QString &fontSize)
+{
+    displayFont.setPointSize(fontSize.toInt());
+    calculateSquareSize();
+    adjustSize();
+    update();
+}
+//! [2]
+
+void CharacterWidget::updateStyle(const QString &fontStyle)
+{
+    const QFont::StyleStrategy oldStrategy = displayFont.styleStrategy();
+    displayFont = QFontDatabase::font(displayFont.family(), fontStyle, displayFont.pointSize());
+    displayFont.setStyleStrategy(oldStrategy);
+    calculateSquareSize();
+    adjustSize();
+    update();
+}
+
+void CharacterWidget::updateFontMerging(bool enable)
+{
+    if (enable)
+        displayFont.setStyleStrategy(QFont::PreferDefault);
+    else
+        displayFont.setStyleStrategy(QFont::NoFontMerging);
+    adjustSize();
+    update();
+}
+
+void CharacterWidget::calculateSquareSize()
+{
+    squareSize = qMax(16, 4 + QFontMetrics(displayFont, this).height());
+}
+
+//! [3]
+QSize CharacterWidget::sizeHint() const
+{
+    return QSize(columns*squareSize, (65536 / columns) * squareSize);
+}
+//! [3]
+
+//! [4]
+void CharacterWidget::mouseMoveEvent(QMouseEvent *event)
+{
+    QPoint widgetPosition = mapFromGlobal(event->globalPosition().toPoint());
+    uint key = (widgetPosition.y() / squareSize) * columns + widgetPosition.x() / squareSize;
+
+    QString text = QString::fromLatin1("<p>Character: <span style=\"font-size: 24pt; font-family: %1\">").arg(displayFont.family())
+                  + QChar(key)
+                  + QString::fromLatin1("</span><p>Value: 0x")
+                  + QString::number(key, 16);
+    QToolTip::showText(event->globalPosition().toPoint(), text, this);
+}
+//! [4]
+
+//! [5]
+void CharacterWidget::mousePressEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton) {
+        lastKey = (event->position().toPoint().y() / squareSize) * columns + event->position().toPoint().x() / squareSize;
+        if (QChar(lastKey).category() != QChar::Other_NotAssigned)
+            emit characterSelected(QString(QChar(lastKey)));
+        update();
+    }
+    else
+        QWidget::mousePressEvent(event);
+}
+//! [5]
+
+//! [6]
+void CharacterWidget::paintEvent(QPaintEvent *event)
+{
+    QPainter painter(this);
+    painter.fillRect(event->rect(), QBrush(Qt::white));
+    painter.setFont(displayFont);
+//! [6]
+
+//! [7]
+    QRect redrawRect = event->rect();
+    int beginRow = redrawRect.top() / squareSize;
+    int endRow = redrawRect.bottom() / squareSize;
+    int beginColumn = redrawRect.left() / squareSize;
+    int endColumn = redrawRect.right() / squareSize;
+//! [7]
+
+//! [8]
+    painter.setPen(QPen(Qt::gray));
+    for (int row = beginRow; row <= endRow; ++row) {
+        for (int column = beginColumn; column <= endColumn; ++column) {
+            painter.drawRect(column * squareSize, row * squareSize, squareSize, squareSize);
+        }
+//! [8] //! [9]
+    }
+//! [9]
+
+//! [10]
+    QFontMetrics fontMetrics(displayFont);
+    painter.setPen(QPen(Qt::black));
+    for (int row = beginRow; row <= endRow; ++row) {
+        for (int column = beginColumn; column <= endColumn; ++column) {
+            int key = row * columns + column;
+            painter.setClipRect(column * squareSize, row * squareSize, squareSize, squareSize);
+
+            if (key == lastKey)
+                painter.fillRect(column * squareSize + 1, row * squareSize + 1,
+                                 squareSize, squareSize, QBrush(Qt::red));
+
+            painter.drawText(column * squareSize + (squareSize / 2) -
+                                 fontMetrics.horizontalAdvance(QChar(key)) / 2,
+                             row * squareSize + 4 + fontMetrics.ascent(),
+                             QString(QChar(key)));
+        }
+    }
+}
+//! [10]