diff options
Diffstat (limited to 'examples/widgets/scribble')
-rw-r--r-- | examples/widgets/scribble/main.cpp | 51 | ||||
-rw-r--r-- | examples/widgets/scribble/mainwindow.cpp | 250 | ||||
-rw-r--r-- | examples/widgets/scribble/mainwindow.h | 92 | ||||
-rw-r--r-- | examples/widgets/scribble/scribble.pro | 13 | ||||
-rw-r--r-- | examples/widgets/scribble/scribblearea.cpp | 215 | ||||
-rw-r--r-- | examples/widgets/scribble/scribblearea.h | 90 |
6 files changed, 711 insertions, 0 deletions
diff --git a/examples/widgets/scribble/main.cpp b/examples/widgets/scribble/main.cpp new file mode 100644 index 0000000000..01c8adae53 --- /dev/null +++ b/examples/widgets/scribble/main.cpp @@ -0,0 +1,51 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QApplication> + +#include "mainwindow.h" + +int main(int argc, char *argv[]) +{ + QApplication app(argc, argv); + MainWindow window; + window.show(); + return app.exec(); +} diff --git a/examples/widgets/scribble/mainwindow.cpp b/examples/widgets/scribble/mainwindow.cpp new file mode 100644 index 0000000000..a45bf07928 --- /dev/null +++ b/examples/widgets/scribble/mainwindow.cpp @@ -0,0 +1,250 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QtGui> + +#include "mainwindow.h" +#include "scribblearea.h" + +//! [0] +MainWindow::MainWindow() +{ + scribbleArea = new ScribbleArea; + setCentralWidget(scribbleArea); + + createActions(); + createMenus(); + + setWindowTitle(tr("Scribble")); + resize(500, 500); +} +//! [0] + +//! [1] +void MainWindow::closeEvent(QCloseEvent *event) +//! [1] //! [2] +{ + if (maybeSave()) { + event->accept(); + } else { + event->ignore(); + } +} +//! [2] + +//! [3] +void MainWindow::open() +//! [3] //! [4] +{ + if (maybeSave()) { + QString fileName = QFileDialog::getOpenFileName(this, + tr("Open File"), QDir::currentPath()); + if (!fileName.isEmpty()) + scribbleArea->openImage(fileName); + } +} +//! [4] + +//! [5] +void MainWindow::save() +//! [5] //! [6] +{ + QAction *action = qobject_cast<QAction *>(sender()); + QByteArray fileFormat = action->data().toByteArray(); + saveFile(fileFormat); +} +//! [6] + +//! [7] +void MainWindow::penColor() +//! [7] //! [8] +{ + QColor newColor = QColorDialog::getColor(scribbleArea->penColor()); + if (newColor.isValid()) + scribbleArea->setPenColor(newColor); +} +//! [8] + +//! [9] +void MainWindow::penWidth() +//! [9] //! [10] +{ + bool ok; + int newWidth = QInputDialog::getInteger(this, tr("Scribble"), + tr("Select pen width:"), + scribbleArea->penWidth(), + 1, 50, 1, &ok); + if (ok) + scribbleArea->setPenWidth(newWidth); +} +//! [10] + +//! [11] +void MainWindow::about() +//! [11] //! [12] +{ + QMessageBox::about(this, tr("About Scribble"), + tr("<p>The <b>Scribble</b> example shows how to use QMainWindow as the " + "base widget for an application, and how to reimplement some of " + "QWidget's event handlers to receive the events generated for " + "the application's widgets:</p><p> We reimplement the mouse event " + "handlers to facilitate drawing, the paint event handler to " + "update the application and the resize event handler to optimize " + "the application's appearance. In addition we reimplement the " + "close event handler to intercept the close events before " + "terminating the application.</p><p> The example also demonstrates " + "how to use QPainter to draw an image in real time, as well as " + "to repaint widgets.</p>")); +} +//! [12] + +//! [13] +void MainWindow::createActions() +//! [13] //! [14] +{ + openAct = new QAction(tr("&Open..."), this); + openAct->setShortcuts(QKeySequence::Open); + connect(openAct, SIGNAL(triggered()), this, SLOT(open())); + + foreach (QByteArray format, QImageWriter::supportedImageFormats()) { + QString text = tr("%1...").arg(QString(format).toUpper()); + + QAction *action = new QAction(text, this); + action->setData(format); + connect(action, SIGNAL(triggered()), this, SLOT(save())); + saveAsActs.append(action); + } + + printAct = new QAction(tr("&Print..."), this); + connect(printAct, SIGNAL(triggered()), scribbleArea, SLOT(print())); + + exitAct = new QAction(tr("E&xit"), this); + exitAct->setShortcuts(QKeySequence::Quit); + connect(exitAct, SIGNAL(triggered()), this, SLOT(close())); + + penColorAct = new QAction(tr("&Pen Color..."), this); + connect(penColorAct, SIGNAL(triggered()), this, SLOT(penColor())); + + penWidthAct = new QAction(tr("Pen &Width..."), this); + connect(penWidthAct, SIGNAL(triggered()), this, SLOT(penWidth())); + + clearScreenAct = new QAction(tr("&Clear Screen"), this); + clearScreenAct->setShortcut(tr("Ctrl+L")); + connect(clearScreenAct, SIGNAL(triggered()), + scribbleArea, SLOT(clearImage())); + + aboutAct = new QAction(tr("&About"), this); + connect(aboutAct, SIGNAL(triggered()), this, SLOT(about())); + + aboutQtAct = new QAction(tr("About &Qt"), this); + connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt())); +} +//! [14] + +//! [15] +void MainWindow::createMenus() +//! [15] //! [16] +{ + saveAsMenu = new QMenu(tr("&Save As"), this); + foreach (QAction *action, saveAsActs) + saveAsMenu->addAction(action); + + fileMenu = new QMenu(tr("&File"), this); + fileMenu->addAction(openAct); + fileMenu->addMenu(saveAsMenu); + fileMenu->addAction(printAct); + fileMenu->addSeparator(); + fileMenu->addAction(exitAct); + + optionMenu = new QMenu(tr("&Options"), this); + optionMenu->addAction(penColorAct); + optionMenu->addAction(penWidthAct); + optionMenu->addSeparator(); + optionMenu->addAction(clearScreenAct); + + helpMenu = new QMenu(tr("&Help"), this); + helpMenu->addAction(aboutAct); + helpMenu->addAction(aboutQtAct); + + menuBar()->addMenu(fileMenu); + menuBar()->addMenu(optionMenu); + menuBar()->addMenu(helpMenu); +} +//! [16] + +//! [17] +bool MainWindow::maybeSave() +//! [17] //! [18] +{ + if (scribbleArea->isModified()) { + QMessageBox::StandardButton ret; + ret = QMessageBox::warning(this, tr("Scribble"), + tr("The image has been modified.\n" + "Do you want to save your changes?"), + QMessageBox::Save | QMessageBox::Discard + | QMessageBox::Cancel); + if (ret == QMessageBox::Save) { + return saveFile("png"); + } else if (ret == QMessageBox::Cancel) { + return false; + } + } + return true; +} +//! [18] + +//! [19] +bool MainWindow::saveFile(const QByteArray &fileFormat) +//! [19] //! [20] +{ + QString initialPath = QDir::currentPath() + "/untitled." + fileFormat; + + QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"), + initialPath, + tr("%1 Files (*.%2);;All Files (*)") + .arg(QString(fileFormat.toUpper())) + .arg(QString(fileFormat))); + if (fileName.isEmpty()) { + return false; + } else { + return scribbleArea->saveImage(fileName, fileFormat); + } +} +//! [20] diff --git a/examples/widgets/scribble/mainwindow.h b/examples/widgets/scribble/mainwindow.h new file mode 100644 index 0000000000..547d35f04f --- /dev/null +++ b/examples/widgets/scribble/mainwindow.h @@ -0,0 +1,92 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** 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 Nokia Corporation and its Subsidiary(-ies) 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." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef MAINWINDOW_H +#define MAINWINDOW_H + +#include <QList> +#include <QMainWindow> + +class ScribbleArea; + +//! [0] +class MainWindow : public QMainWindow +{ + Q_OBJECT + +public: + MainWindow(); + +protected: + void closeEvent(QCloseEvent *event); + +private slots: + void open(); + void save(); + void penColor(); + void penWidth(); + void about(); + +private: + void createActions(); + void createMenus(); + bool maybeSave(); + bool saveFile(const QByteArray &fileFormat); + + ScribbleArea *scribbleArea; + + QMenu *saveAsMenu; + QMenu *fileMenu; + QMenu *optionMenu; + QMenu *helpMenu; + + QAction *openAct; + QList<QAction *> saveAsActs; + QAction *exitAct; + QAction *penColorAct; + QAction *penWidthAct; + QAction *printAct; + QAction *clearScreenAct; + QAction *aboutAct; + QAction *aboutQtAct; +}; +//! [0] + +#endif diff --git a/examples/widgets/scribble/scribble.pro b/examples/widgets/scribble/scribble.pro new file mode 100644 index 0000000000..90084b5b98 --- /dev/null +++ b/examples/widgets/scribble/scribble.pro @@ -0,0 +1,13 @@ +HEADERS = mainwindow.h \ + scribblearea.h +SOURCES = main.cpp \ + mainwindow.cpp \ + scribblearea.cpp + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/widgets/scribble +sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS scribble.pro +sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/widgets/scribble +INSTALLS += target sources + +symbian: include($$QT_SOURCE_TREE/examples/symbianpkgrules.pri) diff --git a/examples/widgets/scribble/scribblearea.cpp b/examples/widgets/scribble/scribblearea.cpp new file mode 100644 index 0000000000..5854e34f42 --- /dev/null +++ b/examples/widgets/scribble/scribblearea.cpp @@ -0,0 +1,215 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QtGui> + +#include "scribblearea.h" + +//! [0] +ScribbleArea::ScribbleArea(QWidget *parent) + : QWidget(parent) +{ + setAttribute(Qt::WA_StaticContents); + modified = false; + scribbling = false; + myPenWidth = 1; + myPenColor = Qt::blue; +} +//! [0] + +//! [1] +bool ScribbleArea::openImage(const QString &fileName) +//! [1] //! [2] +{ + QImage loadedImage; + if (!loadedImage.load(fileName)) + return false; + + QSize newSize = loadedImage.size().expandedTo(size()); + resizeImage(&loadedImage, newSize); + image = loadedImage; + modified = false; + update(); + return true; +} +//! [2] + +//! [3] +bool ScribbleArea::saveImage(const QString &fileName, const char *fileFormat) +//! [3] //! [4] +{ + QImage visibleImage = image; + resizeImage(&visibleImage, size()); + + if (visibleImage.save(fileName, fileFormat)) { + modified = false; + return true; + } else { + return false; + } +} +//! [4] + +//! [5] +void ScribbleArea::setPenColor(const QColor &newColor) +//! [5] //! [6] +{ + myPenColor = newColor; +} +//! [6] + +//! [7] +void ScribbleArea::setPenWidth(int newWidth) +//! [7] //! [8] +{ + myPenWidth = newWidth; +} +//! [8] + +//! [9] +void ScribbleArea::clearImage() +//! [9] //! [10] +{ + image.fill(qRgb(255, 255, 255)); + modified = true; + update(); +} +//! [10] + +//! [11] +void ScribbleArea::mousePressEvent(QMouseEvent *event) +//! [11] //! [12] +{ + if (event->button() == Qt::LeftButton) { + lastPoint = event->pos(); + scribbling = true; + } +} + +void ScribbleArea::mouseMoveEvent(QMouseEvent *event) +{ + if ((event->buttons() & Qt::LeftButton) && scribbling) + drawLineTo(event->pos()); +} + +void ScribbleArea::mouseReleaseEvent(QMouseEvent *event) +{ + if (event->button() == Qt::LeftButton && scribbling) { + drawLineTo(event->pos()); + scribbling = false; + } +} + +//! [12] //! [13] +void ScribbleArea::paintEvent(QPaintEvent *event) +//! [13] //! [14] +{ + QPainter painter(this); + QRect dirtyRect = event->rect(); + painter.drawImage(dirtyRect, image, dirtyRect); +} +//! [14] + +//! [15] +void ScribbleArea::resizeEvent(QResizeEvent *event) +//! [15] //! [16] +{ + if (width() > image.width() || height() > image.height()) { + int newWidth = qMax(width() + 128, image.width()); + int newHeight = qMax(height() + 128, image.height()); + resizeImage(&image, QSize(newWidth, newHeight)); + update(); + } + QWidget::resizeEvent(event); +} +//! [16] + +//! [17] +void ScribbleArea::drawLineTo(const QPoint &endPoint) +//! [17] //! [18] +{ + QPainter painter(&image); + painter.setPen(QPen(myPenColor, myPenWidth, Qt::SolidLine, Qt::RoundCap, + Qt::RoundJoin)); + painter.drawLine(lastPoint, endPoint); + modified = true; + + int rad = (myPenWidth / 2) + 2; + update(QRect(lastPoint, endPoint).normalized() + .adjusted(-rad, -rad, +rad, +rad)); + lastPoint = endPoint; +} +//! [18] + +//! [19] +void ScribbleArea::resizeImage(QImage *image, const QSize &newSize) +//! [19] //! [20] +{ + if (image->size() == newSize) + return; + + QImage newImage(newSize, QImage::Format_RGB32); + newImage.fill(qRgb(255, 255, 255)); + QPainter painter(&newImage); + painter.drawImage(QPoint(0, 0), *image); + *image = newImage; +} +//! [20] + +//! [21] +void ScribbleArea::print() +{ +#ifndef QT_NO_PRINTER + QPrinter printer(QPrinter::HighResolution); + + QPrintDialog *printDialog = new QPrintDialog(&printer, this); +//! [21] //! [22] + if (printDialog->exec() == QDialog::Accepted) { + QPainter painter(&printer); + QRect rect = painter.viewport(); + QSize size = image.size(); + size.scale(rect.size(), Qt::KeepAspectRatio); + painter.setViewport(rect.x(), rect.y(), size.width(), size.height()); + painter.setWindow(image.rect()); + painter.drawImage(0, 0, image); + } +#endif // QT_NO_PRINTER +} +//! [22] diff --git a/examples/widgets/scribble/scribblearea.h b/examples/widgets/scribble/scribblearea.h new file mode 100644 index 0000000000..c93102df42 --- /dev/null +++ b/examples/widgets/scribble/scribblearea.h @@ -0,0 +1,90 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** 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 Nokia Corporation and its Subsidiary(-ies) 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." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef SCRIBBLEAREA_H +#define SCRIBBLEAREA_H + +#include <QColor> +#include <QImage> +#include <QPoint> +#include <QWidget> + +//! [0] +class ScribbleArea : public QWidget +{ + Q_OBJECT + +public: + ScribbleArea(QWidget *parent = 0); + + bool openImage(const QString &fileName); + bool saveImage(const QString &fileName, const char *fileFormat); + void setPenColor(const QColor &newColor); + void setPenWidth(int newWidth); + + bool isModified() const { return modified; } + QColor penColor() const { return myPenColor; } + int penWidth() const { return myPenWidth; } + +public slots: + void clearImage(); + void print(); + +protected: + void mousePressEvent(QMouseEvent *event); + void mouseMoveEvent(QMouseEvent *event); + void mouseReleaseEvent(QMouseEvent *event); + void paintEvent(QPaintEvent *event); + void resizeEvent(QResizeEvent *event); + +private: + void drawLineTo(const QPoint &endPoint); + void resizeImage(QImage *image, const QSize &newSize); + + bool modified; + bool scribbling; + int myPenWidth; + QColor myPenColor; + QImage image; + QPoint lastPoint; +}; +//! [0] + +#endif |