1
/****************************************************************************
3
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
4
** Contact: http://www.qt-project.org/legal
6
** This file is part of the examples of the Qt Toolkit.
8
** $QT_BEGIN_LICENSE:BSD$
9
** You may use this file under the terms of the BSD license as follows:
11
** "Redistribution and use in source and binary forms, with or without
12
** modification, are permitted provided that the following conditions are
14
** * Redistributions of source code must retain the above copyright
15
** notice, this list of conditions and the following disclaimer.
16
** * Redistributions in binary form must reproduce the above copyright
17
** notice, this list of conditions and the following disclaimer in
18
** the documentation and/or other materials provided with the
20
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21
** of its contributors may be used to endorse or promote products derived
22
** from this software without specific prior written permission.
25
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
39
****************************************************************************/
42
#include "interfaces.h"
43
#include "paintarea.h"
46
#include <QMouseEvent>
48
PaintArea::PaintArea(QWidget *parent) :
50
theImage(500, 400, QImage::Format_RGB32),
56
setAttribute(Qt::WA_StaticContents);
57
setAttribute(Qt::WA_NoBackground);
59
theImage.fill(qRgb(255, 255, 255));
62
bool PaintArea::openImage(const QString &fileName)
65
if (!image.load(fileName))
72
bool PaintArea::saveImage(const QString &fileName, const char *fileFormat)
74
return theImage.save(fileName, fileFormat);
77
void PaintArea::setImage(const QImage &image)
79
theImage = image.convertToFormat(QImage::Format_RGB32);
84
void PaintArea::insertShape(const QPainterPath &path)
88
setCursor(Qt::CrossCursor);
92
void PaintArea::setBrushColor(const QColor &color)
97
void PaintArea::setBrushWidth(int width)
103
void PaintArea::setBrush(BrushInterface *brushInterface, const QString &brush)
105
this->brushInterface = brushInterface;
110
QSize PaintArea::sizeHint() const
112
return theImage.size();
115
void PaintArea::paintEvent(QPaintEvent * /* event */)
117
QPainter painter(this);
118
painter.drawImage(QPoint(0, 0), theImage);
121
void PaintArea::mousePressEvent(QMouseEvent *event)
123
if (event->button() == Qt::LeftButton) {
124
if (!pendingPath.isEmpty()) {
125
QPainter painter(&theImage);
126
setupPainter(painter);
128
const QRectF boundingRect = pendingPath.boundingRect();
129
QLinearGradient gradient(boundingRect.topRight(),
130
boundingRect.bottomLeft());
131
gradient.setColorAt(0.0, QColor(color.red(), color.green(),
133
gradient.setColorAt(1.0, QColor(color.red(), color.green(),
135
painter.setBrush(gradient);
136
painter.translate(event->pos() - boundingRect.center());
137
painter.drawPath(pendingPath);
139
pendingPath = QPainterPath();
145
if (brushInterface) {
146
QPainter painter(&theImage);
147
setupPainter(painter);
148
const QRect rect = brushInterface->mousePress(brush, painter,
153
lastPos = event->pos();
159
void PaintArea::mouseMoveEvent(QMouseEvent *event)
161
if ((event->buttons() & Qt::LeftButton) && lastPos != QPoint(-1, -1)) {
162
if (brushInterface) {
163
QPainter painter(&theImage);
164
setupPainter(painter);
165
const QRect rect = brushInterface->mouseMove(brush, painter, lastPos,
170
lastPos = event->pos();
175
void PaintArea::mouseReleaseEvent(QMouseEvent *event)
177
if (event->button() == Qt::LeftButton && lastPos != QPoint(-1, -1)) {
178
if (brushInterface) {
179
QPainter painter(&theImage);
180
setupPainter(painter);
181
QRect rect = brushInterface->mouseRelease(brush, painter,
186
lastPos = QPoint(-1, -1);
190
void PaintArea::setupPainter(QPainter &painter)
192
painter.setRenderHint(QPainter::Antialiasing, true);
193
painter.setPen(QPen(color, thickness, Qt::SolidLine, Qt::RoundCap,