diff options
Diffstat (limited to 'tests/manual/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.cpp')
-rw-r--r-- | tests/manual/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.cpp | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.cpp b/tests/manual/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.cpp new file mode 100644 index 0000000000..6a350f38a4 --- /dev/null +++ b/tests/manual/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.cpp @@ -0,0 +1,150 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include "basictoolsplugin.h" + +#include <QInputDialog> +#include <QPainter> +#include <QRandomGenerator> +#include <QtMath> + +//! [0] +QStringList BasicToolsPlugin::brushes() const +{ + return {tr("Pencil"), tr("Air Brush"), tr("Random Letters")}; +} +//! [0] + +//! [1] +QRect BasicToolsPlugin::mousePress(const QString &brush, QPainter &painter, + const QPoint &pos) +{ + return mouseMove(brush, painter, pos, pos); +} +//! [1] + +//! [2] +QRect BasicToolsPlugin::mouseMove(const QString &brush, QPainter &painter, + const QPoint &oldPos, const QPoint &newPos) +{ + painter.save(); + + int rad = painter.pen().width() / 2; + QRect boundingRect = QRect(oldPos, newPos).normalized() + .adjusted(-rad, -rad, +rad, +rad); + QColor color = painter.pen().color(); + int thickness = painter.pen().width(); + QColor transparentColor(color.red(), color.green(), color.blue(), 0); +//! [2] //! [3] + + if (brush == tr("Pencil")) { + painter.drawLine(oldPos, newPos); + } else if (brush == tr("Air Brush")) { + int numSteps = 2 + (newPos - oldPos).manhattanLength() / 2; + + painter.setBrush(QBrush(color, Qt::Dense6Pattern)); + painter.setPen(Qt::NoPen); + + for (int i = 0; i < numSteps; ++i) { + int x = oldPos.x() + i * (newPos.x() - oldPos.x()) / (numSteps - 1); + int y = oldPos.y() + i * (newPos.y() - oldPos.y()) / (numSteps - 1); + + painter.drawEllipse(x - (thickness / 2), y - (thickness / 2), + thickness, thickness); + } + } else if (brush == tr("Random Letters")) { + QChar ch(QRandomGenerator::global()->bounded('A', 'Z' + 1)); + + QFont biggerFont = painter.font(); + biggerFont.setBold(true); + biggerFont.setPointSize(biggerFont.pointSize() + thickness); + painter.setFont(biggerFont); + + painter.drawText(newPos, QString(ch)); + + QFontMetrics metrics(painter.font()); + boundingRect = metrics.boundingRect(ch); + boundingRect.translate(newPos); + boundingRect.adjust(-10, -10, +10, +10); + } + painter.restore(); + return boundingRect; +} +//! [3] + +//! [4] +QRect BasicToolsPlugin::mouseRelease(const QString & /* brush */, + QPainter & /* painter */, + const QPoint & /* pos */) +{ + return QRect(0, 0, 0, 0); +} +//! [4] + +//! [5] +QStringList BasicToolsPlugin::shapes() const +{ + return {tr("Circle"), tr("Star"), tr("Text...")}; +} +//! [5] + +//! [6] +QPainterPath BasicToolsPlugin::generateShape(const QString &shape, + QWidget *parent) +{ + QPainterPath path; + + if (shape == tr("Circle")) { + path.addEllipse(0, 0, 50, 50); + } else if (shape == tr("Star")) { + path.moveTo(90, 50); + for (int i = 1; i < 5; ++i) { + path.lineTo(50 + 40 * std::cos(0.8 * i * M_PI), + 50 + 40 * std::sin(0.8 * i * M_PI)); + } + path.closeSubpath(); + } else if (shape == tr("Text...")) { + QString text = QInputDialog::getText(parent, tr("Text Shape"), + tr("Enter text:"), + QLineEdit::Normal, tr("Qt")); + if (!text.isEmpty()) { + QFont timesFont("Times", 50); + timesFont.setStyleStrategy(QFont::ForceOutline); + path.addText(0, 0, timesFont, text); + } + } + + return path; +} +//! [6] + +//! [7] +QStringList BasicToolsPlugin::filters() const +{ + return {tr("Invert Pixels"), tr("Swap RGB"), tr("Grayscale")}; +} +//! [7] + +//! [8] +QImage BasicToolsPlugin::filterImage(const QString &filter, const QImage &image, + QWidget * /* parent */) +{ + QImage result = image.convertToFormat(QImage::Format_RGB32); + + if (filter == tr("Invert Pixels")) { + result.invertPixels(); + } else if (filter == tr("Swap RGB")) { + result = result.rgbSwapped(); + } else if (filter == tr("Grayscale")) { + for (int y = 0; y < result.height(); ++y) { + for (int x = 0; x < result.width(); ++x) { + QRgb pixel = result.pixel(x, y); + int gray = qGray(pixel); + int alpha = qAlpha(pixel); + result.setPixel(x, y, qRgba(gray, gray, gray, alpha)); + } + } + } + return result; +} +//! [8] |