/****************************************************************************
**
** 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]