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authorOswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>2016-04-26 14:43:01 +0200
committerOswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>2016-05-03 10:25:18 +0000
commit5bbbea4c83149d6920cff2991fc2458c49a1004e (patch)
treedc7ec998c852258719a5b85d1cce5323235767f8 /examples/widgets/tools/plugandpaint/app/paintarea.cpp
parente34ebe632825433d591165db737f732f741bbd9f (diff)
normalize structure of plugandpaint example
as in other examples which come with plugins, use an additional hierarchy level which contains the app and plugin subdirs. Change-Id: I2487755967aa3474c337c8c8af10be49627b63d0 Reviewed-by: Topi Reiniƶ <topi.reinio@theqtcompany.com>
Diffstat (limited to 'examples/widgets/tools/plugandpaint/app/paintarea.cpp')
-rw-r--r--examples/widgets/tools/plugandpaint/app/paintarea.cpp195
1 files changed, 195 insertions, 0 deletions
diff --git a/examples/widgets/tools/plugandpaint/app/paintarea.cpp b/examples/widgets/tools/plugandpaint/app/paintarea.cpp
new file mode 100644
index 0000000000..f5816c6d8e
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+++ b/examples/widgets/tools/plugandpaint/app/paintarea.cpp
@@ -0,0 +1,195 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of The Qt Company Ltd nor the names of its
+** contributors may be used to endorse or promote products derived
+** from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include "interfaces.h"
+#include "paintarea.h"
+
+#include <QPainter>
+#include <QMouseEvent>
+
+PaintArea::PaintArea(QWidget *parent) :
+ QWidget(parent),
+ theImage(500, 400, QImage::Format_RGB32),
+ color(Qt::blue),
+ thickness(3),
+ brushInterface(0),
+ lastPos(-1, -1)
+{
+ setAttribute(Qt::WA_StaticContents);
+ setAttribute(Qt::WA_NoBackground);
+
+ theImage.fill(qRgb(255, 255, 255));
+}
+
+bool PaintArea::openImage(const QString &fileName)
+{
+ QImage image;
+ if (!image.load(fileName))
+ return false;
+
+ setImage(image);
+ return true;
+}
+
+bool PaintArea::saveImage(const QString &fileName, const char *fileFormat)
+{
+ return theImage.save(fileName, fileFormat);
+}
+
+void PaintArea::setImage(const QImage &image)
+{
+ theImage = image.convertToFormat(QImage::Format_RGB32);
+ update();
+ updateGeometry();
+}
+
+void PaintArea::insertShape(const QPainterPath &path)
+{
+ pendingPath = path;
+#ifndef QT_NO_CURSOR
+ setCursor(Qt::CrossCursor);
+#endif
+}
+
+void PaintArea::setBrushColor(const QColor &color)
+{
+ this->color = color;
+}
+
+void PaintArea::setBrushWidth(int width)
+{
+ thickness = width;
+}
+
+//! [0]
+void PaintArea::setBrush(BrushInterface *brushInterface, const QString &brush)
+{
+ this->brushInterface = brushInterface;
+ this->brush = brush;
+}
+//! [0]
+
+QSize PaintArea::sizeHint() const
+{
+ return theImage.size();
+}
+
+void PaintArea::paintEvent(QPaintEvent * /* event */)
+{
+ QPainter painter(this);
+ painter.drawImage(QPoint(0, 0), theImage);
+}
+
+void PaintArea::mousePressEvent(QMouseEvent *event)
+{
+ if (event->button() == Qt::LeftButton) {
+ if (!pendingPath.isEmpty()) {
+ QPainter painter(&theImage);
+ setupPainter(painter);
+
+ const QRectF boundingRect = pendingPath.boundingRect();
+ QLinearGradient gradient(boundingRect.topRight(),
+ boundingRect.bottomLeft());
+ gradient.setColorAt(0.0, QColor(color.red(), color.green(),
+ color.blue(), 63));
+ gradient.setColorAt(1.0, QColor(color.red(), color.green(),
+ color.blue(), 191));
+ painter.setBrush(gradient);
+ painter.translate(event->pos() - boundingRect.center());
+ painter.drawPath(pendingPath);
+
+ pendingPath = QPainterPath();
+#ifndef QT_NO_CURSOR
+ unsetCursor();
+#endif
+ update();
+ } else {
+ if (brushInterface) {
+ QPainter painter(&theImage);
+ setupPainter(painter);
+ const QRect rect = brushInterface->mousePress(brush, painter,
+ event->pos());
+ update(rect);
+ }
+
+ lastPos = event->pos();
+ }
+ }
+}
+
+//! [1]
+void PaintArea::mouseMoveEvent(QMouseEvent *event)
+{
+ if ((event->buttons() & Qt::LeftButton) && lastPos != QPoint(-1, -1)) {
+ if (brushInterface) {
+ QPainter painter(&theImage);
+ setupPainter(painter);
+ const QRect rect = brushInterface->mouseMove(brush, painter, lastPos,
+ event->pos());
+ update(rect);
+ }
+
+ lastPos = event->pos();
+ }
+}
+//! [1]
+
+void PaintArea::mouseReleaseEvent(QMouseEvent *event)
+{
+ if (event->button() == Qt::LeftButton && lastPos != QPoint(-1, -1)) {
+ if (brushInterface) {
+ QPainter painter(&theImage);
+ setupPainter(painter);
+ QRect rect = brushInterface->mouseRelease(brush, painter,
+ event->pos());
+ update(rect);
+ }
+
+ lastPos = QPoint(-1, -1);
+ }
+}
+
+void PaintArea::setupPainter(QPainter &painter)
+{
+ painter.setRenderHint(QPainter::Antialiasing, true);
+ painter.setPen(QPen(color, thickness, Qt::SolidLine, Qt::RoundCap,
+ Qt::RoundJoin));
+}