diff options
Diffstat (limited to 'tests/manual/examples/widgets/widgets/charactermap/characterwidget.cpp')
-rw-r--r-- | tests/manual/examples/widgets/widgets/charactermap/characterwidget.cpp | 145 |
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] |