--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/graphicsview/diagramscene/mainwindow.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,652 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QLabel>
+
+#include "mainwindow.h"
+#include "diagramitem.h"
+#include "diagramscene.h"
+#include "diagramtextitem.h"
+
+const int InsertTextButton = 10;
+
+//! [0]
+MainWindow::MainWindow()
+{
+ createActions();
+ createToolBox();
+ createMenus();
+
+ scene = new DiagramScene(itemMenu);
+ scene->setSceneRect(QRectF(0, 0, 5000, 5000));
+ connect(scene, SIGNAL(itemInserted(DiagramItem *)),
+ this, SLOT(itemInserted(DiagramItem *)));
+ connect(scene, SIGNAL(textInserted(QGraphicsTextItem *)),
+ this, SLOT(textInserted(QGraphicsTextItem *)));
+ connect(scene, SIGNAL(itemSelected(QGraphicsItem *)),
+ this, SLOT(itemSelected(QGraphicsItem *)));
+ createToolbars();
+
+ QHBoxLayout *layout = new QHBoxLayout;
+ layout->addWidget(toolBox);
+ view = new QGraphicsView(scene);
+ layout->addWidget(view);
+
+ QWidget *widget = new QWidget;
+ widget->setLayout(layout);
+
+ setCentralWidget(widget);
+ setWindowTitle(tr("Diagramscene"));
+ setUnifiedTitleAndToolBarOnMac(true);
+}
+//! [0]
+
+//! [1]
+void MainWindow::backgroundButtonGroupClicked(QAbstractButton *button)
+{
+ QList<QAbstractButton *> buttons = backgroundButtonGroup->buttons();
+ foreach (QAbstractButton *myButton, buttons) {
+ if (myButton != button)
+ button->setChecked(false);
+ }
+ QString text = button->text();
+ if (text == tr("Blue Grid"))
+ scene->setBackgroundBrush(QPixmap(":/images/background1.png"));
+ else if (text == tr("White Grid"))
+ scene->setBackgroundBrush(QPixmap(":/images/background2.png"));
+ else if (text == tr("Gray Grid"))
+ scene->setBackgroundBrush(QPixmap(":/images/background3.png"));
+ else
+ scene->setBackgroundBrush(QPixmap(":/images/background4.png"));
+
+ scene->update();
+ view->update();
+}
+//! [1]
+
+//! [2]
+void MainWindow::buttonGroupClicked(int id)
+{
+ QList<QAbstractButton *> buttons = buttonGroup->buttons();
+ foreach (QAbstractButton *button, buttons) {
+ if (buttonGroup->button(id) != button)
+ button->setChecked(false);
+ }
+ if (id == InsertTextButton) {
+ scene->setMode(DiagramScene::InsertText);
+ } else {
+ scene->setItemType(DiagramItem::DiagramType(id));
+ scene->setMode(DiagramScene::InsertItem);
+ }
+}
+//! [2]
+
+//! [3]
+void MainWindow::deleteItem()
+{
+ foreach (QGraphicsItem *item, scene->selectedItems()) {
+ if (item->type() == DiagramItem::Type) {
+ qgraphicsitem_cast<DiagramItem *>(item)->removeArrows();
+ }
+ scene->removeItem(item);
+ }
+}
+//! [3]
+
+//! [4]
+void MainWindow::pointerGroupClicked(int)
+{
+ scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId()));
+}
+//! [4]
+
+//! [5]
+void MainWindow::bringToFront()
+{
+ if (scene->selectedItems().isEmpty())
+ return;
+
+ QGraphicsItem *selectedItem = scene->selectedItems().first();
+ QList<QGraphicsItem *> overlapItems = selectedItem->collidingItems();
+
+ qreal zValue = 0;
+ foreach (QGraphicsItem *item, overlapItems) {
+ if (item->zValue() >= zValue &&
+ item->type() == DiagramItem::Type)
+ zValue = item->zValue() + 0.1;
+ }
+ selectedItem->setZValue(zValue);
+}
+//! [5]
+
+//! [6]
+void MainWindow::sendToBack()
+{
+ if (scene->selectedItems().isEmpty())
+ return;
+
+ QGraphicsItem *selectedItem = scene->selectedItems().first();
+ QList<QGraphicsItem *> overlapItems = selectedItem->collidingItems();
+
+ qreal zValue = 0;
+ foreach (QGraphicsItem *item, overlapItems) {
+ if (item->zValue() <= zValue &&
+ item->type() == DiagramItem::Type)
+ zValue = item->zValue() - 0.1;
+ }
+ selectedItem->setZValue(zValue);
+}
+//! [6]
+
+//! [7]
+void MainWindow::itemInserted(DiagramItem *item)
+{
+ pointerTypeGroup->button(int(DiagramScene::MoveItem))->setChecked(true);
+ scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId()));
+ buttonGroup->button(int(item->diagramType()))->setChecked(false);
+}
+//! [7]
+
+//! [8]
+void MainWindow::textInserted(QGraphicsTextItem *)
+{
+ buttonGroup->button(InsertTextButton)->setChecked(false);
+ scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId()));
+}
+//! [8]
+
+//! [9]
+void MainWindow::currentFontChanged(const QFont &)
+{
+ handleFontChange();
+}
+//! [9]
+
+//! [10]
+void MainWindow::fontSizeChanged(const QString &)
+{
+ handleFontChange();
+}
+//! [10]
+
+//! [11]
+void MainWindow::sceneScaleChanged(const QString &scale)
+{
+ double newScale = scale.left(scale.indexOf(tr("%"))).toDouble() / 100.0;
+ QMatrix oldMatrix = view->matrix();
+ view->resetMatrix();
+ view->translate(oldMatrix.dx(), oldMatrix.dy());
+ view->scale(newScale, newScale);
+}
+//! [11]
+
+//! [12]
+void MainWindow::textColorChanged()
+{
+ textAction = qobject_cast<QAction *>(sender());
+ fontColorToolButton->setIcon(createColorToolButtonIcon(
+ ":/images/textpointer.png",
+ qVariantValue<QColor>(textAction->data())));
+ textButtonTriggered();
+}
+//! [12]
+
+//! [13]
+void MainWindow::itemColorChanged()
+{
+ fillAction = qobject_cast<QAction *>(sender());
+ fillColorToolButton->setIcon(createColorToolButtonIcon(
+ ":/images/floodfill.png",
+ qVariantValue<QColor>(fillAction->data())));
+ fillButtonTriggered();
+}
+//! [13]
+
+//! [14]
+void MainWindow::lineColorChanged()
+{
+ lineAction = qobject_cast<QAction *>(sender());
+ lineColorToolButton->setIcon(createColorToolButtonIcon(
+ ":/images/linecolor.png",
+ qVariantValue<QColor>(lineAction->data())));
+ lineButtonTriggered();
+}
+//! [14]
+
+//! [15]
+void MainWindow::textButtonTriggered()
+{
+ scene->setTextColor(qVariantValue<QColor>(textAction->data()));
+}
+//! [15]
+
+//! [16]
+void MainWindow::fillButtonTriggered()
+{
+ scene->setItemColor(qVariantValue<QColor>(fillAction->data()));
+}
+//! [16]
+
+//! [17]
+void MainWindow::lineButtonTriggered()
+{
+ scene->setLineColor(qVariantValue<QColor>(lineAction->data()));
+}
+//! [17]
+
+//! [18]
+void MainWindow::handleFontChange()
+{
+ QFont font = fontCombo->currentFont();
+ font.setPointSize(fontSizeCombo->currentText().toInt());
+ font.setWeight(boldAction->isChecked() ? QFont::Bold : QFont::Normal);
+ font.setItalic(italicAction->isChecked());
+ font.setUnderline(underlineAction->isChecked());
+
+ scene->setFont(font);
+}
+//! [18]
+
+//! [19]
+void MainWindow::itemSelected(QGraphicsItem *item)
+{
+ DiagramTextItem *textItem =
+ qgraphicsitem_cast<DiagramTextItem *>(item);
+
+ QFont font = textItem->font();
+ QColor color = textItem->defaultTextColor();
+ fontCombo->setCurrentFont(font);
+ fontSizeCombo->setEditText(QString().setNum(font.pointSize()));
+ boldAction->setChecked(font.weight() == QFont::Bold);
+ italicAction->setChecked(font.italic());
+ underlineAction->setChecked(font.underline());
+}
+//! [19]
+
+//! [20]
+void MainWindow::about()
+{
+ QMessageBox::about(this, tr("About Diagram Scene"),
+ tr("The <b>Diagram Scene</b> example shows "
+ "use of the graphics framework."));
+}
+//! [20]
+
+//! [21]
+void MainWindow::createToolBox()
+{
+ buttonGroup = new QButtonGroup;
+ buttonGroup->setExclusive(false);
+ connect(buttonGroup, SIGNAL(buttonClicked(int)),
+ this, SLOT(buttonGroupClicked(int)));
+ QGridLayout *layout = new QGridLayout;
+ layout->addWidget(createCellWidget(tr("Conditional"),
+ DiagramItem::Conditional), 0, 0);
+ layout->addWidget(createCellWidget(tr("Process"),
+ DiagramItem::Step),0, 1);
+ layout->addWidget(createCellWidget(tr("Input/Output"),
+ DiagramItem::Io), 1, 0);
+//! [21]
+
+ QToolButton *textButton = new QToolButton;
+ textButton->setCheckable(true);
+ buttonGroup->addButton(textButton, InsertTextButton);
+ textButton->setIcon(QIcon(QPixmap(":/images/textpointer.png")
+ .scaled(30, 30)));
+ textButton->setIconSize(QSize(50, 50));
+ QGridLayout *textLayout = new QGridLayout;
+ textLayout->addWidget(textButton, 0, 0, Qt::AlignHCenter);
+ textLayout->addWidget(new QLabel(tr("Text")), 1, 0, Qt::AlignCenter);
+ QWidget *textWidget = new QWidget;
+ textWidget->setLayout(textLayout);
+ layout->addWidget(textWidget, 1, 1);
+
+ layout->setRowStretch(3, 10);
+ layout->setColumnStretch(2, 10);
+
+ QWidget *itemWidget = new QWidget;
+ itemWidget->setLayout(layout);
+
+ backgroundButtonGroup = new QButtonGroup;
+ connect(backgroundButtonGroup, SIGNAL(buttonClicked(QAbstractButton *)),
+ this, SLOT(backgroundButtonGroupClicked(QAbstractButton *)));
+
+ QGridLayout *backgroundLayout = new QGridLayout;
+ backgroundLayout->addWidget(createBackgroundCellWidget(tr("Blue Grid"),
+ ":/images/background1.png"), 0, 0);
+ backgroundLayout->addWidget(createBackgroundCellWidget(tr("White Grid"),
+ ":/images/background2.png"), 0, 1);
+ backgroundLayout->addWidget(createBackgroundCellWidget(tr("Gray Grid"),
+ ":/images/background3.png"), 1, 0);
+ backgroundLayout->addWidget(createBackgroundCellWidget(tr("No Grid"),
+ ":/images/background4.png"), 1, 1);
+
+ backgroundLayout->setRowStretch(2, 10);
+ backgroundLayout->setColumnStretch(2, 10);
+
+ QWidget *backgroundWidget = new QWidget;
+ backgroundWidget->setLayout(backgroundLayout);
+
+
+//! [22]
+ toolBox = new QToolBox;
+ toolBox->setSizePolicy(QSizePolicy(QSizePolicy::Maximum, QSizePolicy::Ignored));
+ toolBox->setMinimumWidth(itemWidget->sizeHint().width());
+ toolBox->addItem(itemWidget, tr("Basic Flowchart Shapes"));
+ toolBox->addItem(backgroundWidget, tr("Backgrounds"));
+}
+//! [22]
+
+//! [23]
+void MainWindow::createActions()
+{
+ toFrontAction = new QAction(QIcon(":/images/bringtofront.png"),
+ tr("Bring to &Front"), this);
+ toFrontAction->setShortcut(tr("Ctrl+F"));
+ toFrontAction->setStatusTip(tr("Bring item to front"));
+ connect(toFrontAction, SIGNAL(triggered()),
+ this, SLOT(bringToFront()));
+//! [23]
+
+ sendBackAction = new QAction(QIcon(":/images/sendtoback.png"),
+ tr("Send to &Back"), this);
+ sendBackAction->setShortcut(tr("Ctrl+B"));
+ sendBackAction->setStatusTip(tr("Send item to back"));
+ connect(sendBackAction, SIGNAL(triggered()),
+ this, SLOT(sendToBack()));
+
+ deleteAction = new QAction(QIcon(":/images/delete.png"),
+ tr("&Delete"), this);
+ deleteAction->setShortcut(tr("Delete"));
+ deleteAction->setStatusTip(tr("Delete item from diagram"));
+ connect(deleteAction, SIGNAL(triggered()),
+ this, SLOT(deleteItem()));
+
+ exitAction = new QAction(tr("E&xit"), this);
+ exitAction->setShortcuts(QKeySequence::Quit);
+ exitAction->setStatusTip(tr("Quit Scenediagram example"));
+ connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));
+
+ boldAction = new QAction(tr("Bold"), this);
+ boldAction->setCheckable(true);
+ QPixmap pixmap(":/images/bold.png");
+ boldAction->setIcon(QIcon(pixmap));
+ boldAction->setShortcut(tr("Ctrl+B"));
+ connect(boldAction, SIGNAL(triggered()),
+ this, SLOT(handleFontChange()));
+
+ italicAction = new QAction(QIcon(":/images/italic.png"),
+ tr("Italic"), this);
+ italicAction->setCheckable(true);
+ italicAction->setShortcut(tr("Ctrl+I"));
+ connect(italicAction, SIGNAL(triggered()),
+ this, SLOT(handleFontChange()));
+
+ underlineAction = new QAction(QIcon(":/images/underline.png"),
+ tr("Underline"), this);
+ underlineAction->setCheckable(true);
+ underlineAction->setShortcut(tr("Ctrl+U"));
+ connect(underlineAction, SIGNAL(triggered()),
+ this, SLOT(handleFontChange()));
+
+ aboutAction = new QAction(tr("A&bout"), this);
+ aboutAction->setShortcut(tr("Ctrl+B"));
+ connect(aboutAction, SIGNAL(triggered()),
+ this, SLOT(about()));
+}
+
+//! [24]
+void MainWindow::createMenus()
+{
+ fileMenu = menuBar()->addMenu(tr("&File"));
+ fileMenu->addAction(exitAction);
+
+ itemMenu = menuBar()->addMenu(tr("&Item"));
+ itemMenu->addAction(deleteAction);
+ itemMenu->addSeparator();
+ itemMenu->addAction(toFrontAction);
+ itemMenu->addAction(sendBackAction);
+
+ aboutMenu = menuBar()->addMenu(tr("&Help"));
+ aboutMenu->addAction(aboutAction);
+}
+//! [24]
+
+//! [25]
+void MainWindow::createToolbars()
+{
+//! [25]
+ editToolBar = addToolBar(tr("Edit"));
+ editToolBar->addAction(deleteAction);
+ editToolBar->addAction(toFrontAction);
+ editToolBar->addAction(sendBackAction);
+
+ fontCombo = new QFontComboBox();
+ fontSizeCombo = new QComboBox();
+ connect(fontCombo, SIGNAL(currentFontChanged(const QFont &)),
+ this, SLOT(currentFontChanged(const QFont &)));
+
+ fontSizeCombo = new QComboBox;
+ fontSizeCombo->setEditable(true);
+ for (int i = 8; i < 30; i = i + 2)
+ fontSizeCombo->addItem(QString().setNum(i));
+ QIntValidator *validator = new QIntValidator(2, 64, this);
+ fontSizeCombo->setValidator(validator);
+ connect(fontSizeCombo, SIGNAL(currentIndexChanged(const QString &)),
+ this, SLOT(fontSizeChanged(const QString &)));
+
+ fontColorToolButton = new QToolButton;
+ fontColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
+ fontColorToolButton->setMenu(createColorMenu(SLOT(textColorChanged()),
+ Qt::black));
+ textAction = fontColorToolButton->menu()->defaultAction();
+ fontColorToolButton->setIcon(createColorToolButtonIcon(
+ ":/images/textpointer.png", Qt::black));
+ fontColorToolButton->setAutoFillBackground(true);
+ connect(fontColorToolButton, SIGNAL(clicked()),
+ this, SLOT(textButtonTriggered()));
+
+//! [26]
+ fillColorToolButton = new QToolButton;
+ fillColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
+ fillColorToolButton->setMenu(createColorMenu(SLOT(itemColorChanged()),
+ Qt::white));
+ fillAction = fillColorToolButton->menu()->defaultAction();
+ fillColorToolButton->setIcon(createColorToolButtonIcon(
+ ":/images/floodfill.png", Qt::white));
+ connect(fillColorToolButton, SIGNAL(clicked()),
+ this, SLOT(fillButtonTriggered()));
+//! [26]
+
+ lineColorToolButton = new QToolButton;
+ lineColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
+ lineColorToolButton->setMenu(createColorMenu(SLOT(lineColorChanged()),
+ Qt::black));
+ lineAction = lineColorToolButton->menu()->defaultAction();
+ lineColorToolButton->setIcon(createColorToolButtonIcon(
+ ":/images/linecolor.png", Qt::black));
+ connect(lineColorToolButton, SIGNAL(clicked()),
+ this, SLOT(lineButtonTriggered()));
+
+ textToolBar = addToolBar(tr("Font"));
+ textToolBar->addWidget(fontCombo);
+ textToolBar->addWidget(fontSizeCombo);
+ textToolBar->addAction(boldAction);
+ textToolBar->addAction(italicAction);
+ textToolBar->addAction(underlineAction);
+
+ colorToolBar = addToolBar(tr("Color"));
+ colorToolBar->addWidget(fontColorToolButton);
+ colorToolBar->addWidget(fillColorToolButton);
+ colorToolBar->addWidget(lineColorToolButton);
+
+ QToolButton *pointerButton = new QToolButton;
+ pointerButton->setCheckable(true);
+ pointerButton->setChecked(true);
+ pointerButton->setIcon(QIcon(":/images/pointer.png"));
+ QToolButton *linePointerButton = new QToolButton;
+ linePointerButton->setCheckable(true);
+ linePointerButton->setIcon(QIcon(":/images/linepointer.png"));
+
+ pointerTypeGroup = new QButtonGroup;
+ pointerTypeGroup->addButton(pointerButton, int(DiagramScene::MoveItem));
+ pointerTypeGroup->addButton(linePointerButton,
+ int(DiagramScene::InsertLine));
+ connect(pointerTypeGroup, SIGNAL(buttonClicked(int)),
+ this, SLOT(pointerGroupClicked(int)));
+
+ sceneScaleCombo = new QComboBox;
+ QStringList scales;
+ scales << tr("50%") << tr("75%") << tr("100%") << tr("125%") << tr("150%");
+ sceneScaleCombo->addItems(scales);
+ sceneScaleCombo->setCurrentIndex(2);
+ connect(sceneScaleCombo, SIGNAL(currentIndexChanged(const QString &)),
+ this, SLOT(sceneScaleChanged(const QString &)));
+
+ pointerToolbar = addToolBar(tr("Pointer type"));
+ pointerToolbar->addWidget(pointerButton);
+ pointerToolbar->addWidget(linePointerButton);
+ pointerToolbar->addWidget(sceneScaleCombo);
+//! [27]
+}
+//! [27]
+
+//! [28]
+QWidget *MainWindow::createBackgroundCellWidget(const QString &text,
+ const QString &image)
+{
+ QToolButton *button = new QToolButton;
+ button->setText(text);
+ button->setIcon(QIcon(image));
+ button->setIconSize(QSize(50, 50));
+ button->setCheckable(true);
+ backgroundButtonGroup->addButton(button);
+
+ QGridLayout *layout = new QGridLayout;
+ layout->addWidget(button, 0, 0, Qt::AlignHCenter);
+ layout->addWidget(new QLabel(text), 1, 0, Qt::AlignCenter);
+
+ QWidget *widget = new QWidget;
+ widget->setLayout(layout);
+
+ return widget;
+}
+//! [28]
+
+//! [29]
+QWidget *MainWindow::createCellWidget(const QString &text,
+ DiagramItem::DiagramType type)
+{
+
+ DiagramItem item(type, itemMenu);
+ QIcon icon(item.image());
+
+ QToolButton *button = new QToolButton;
+ button->setIcon(icon);
+ button->setIconSize(QSize(50, 50));
+ button->setCheckable(true);
+ buttonGroup->addButton(button, int(type));
+
+ QGridLayout *layout = new QGridLayout;
+ layout->addWidget(button, 0, 0, Qt::AlignHCenter);
+ layout->addWidget(new QLabel(text), 1, 0, Qt::AlignCenter);
+
+ QWidget *widget = new QWidget;
+ widget->setLayout(layout);
+
+ return widget;
+}
+//! [29]
+
+//! [30]
+QMenu *MainWindow::createColorMenu(const char *slot, QColor defaultColor)
+{
+ QList<QColor> colors;
+ colors << Qt::black << Qt::white << Qt::red << Qt::blue << Qt::yellow;
+ QStringList names;
+ names << tr("black") << tr("white") << tr("red") << tr("blue")
+ << tr("yellow");
+
+ QMenu *colorMenu = new QMenu;
+ for (int i = 0; i < colors.count(); ++i) {
+ QAction *action = new QAction(names.at(i), this);
+ action->setData(colors.at(i));
+ action->setIcon(createColorIcon(colors.at(i)));
+ connect(action, SIGNAL(triggered()),
+ this, slot);
+ colorMenu->addAction(action);
+ if (colors.at(i) == defaultColor) {
+ colorMenu->setDefaultAction(action);
+ }
+ }
+ return colorMenu;
+}
+//! [30]
+
+//! [31]
+QIcon MainWindow::createColorToolButtonIcon(const QString &imageFile,
+ QColor color)
+{
+ QPixmap pixmap(50, 80);
+ pixmap.fill(Qt::transparent);
+ QPainter painter(&pixmap);
+ QPixmap image(imageFile);
+ QRect target(0, 0, 50, 60);
+ QRect source(0, 0, 42, 42);
+ painter.fillRect(QRect(0, 60, 50, 80), color);
+ painter.drawPixmap(target, image, source);
+
+ return QIcon(pixmap);
+}
+//! [31]
+
+//! [32]
+QIcon MainWindow::createColorIcon(QColor color)
+{
+ QPixmap pixmap(20, 20);
+ QPainter painter(&pixmap);
+ painter.setPen(Qt::NoPen);
+ painter.fillRect(QRect(0, 0, 20, 20), color);
+
+ return QIcon(pixmap);
+}
+//! [32]