qt5base-lts/examples/widgets/graphicsview/diagramscene/mainwindow.cpp
Jani Heikkinen cd46a2daf5 Unify license header usage.
Update files using old header.LGPL3 to header.LGPL
Update files using old FDL template to use new one
Update files using old BSD template to use new one

Change-Id: I36a78272516f9953d02956522f285b40adfc8915
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
2016-03-29 10:20:03 +00:00

644 lines
21 KiB
C++

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
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** accordance with the commercial license agreement provided with the
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** information use the contact form at https://www.qt.io/contact-us.
**
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** Alternatively, 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.
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** the documentation and/or other materials provided with the
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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****************************************************************************/
#include "arrow.h"
#include "diagramitem.h"
#include "diagramscene.h"
#include "diagramtextitem.h"
#include "mainwindow.h"
#include <QtWidgets>
const int InsertTextButton = 10;
//! [0]
MainWindow::MainWindow()
{
createActions();
createToolBox();
createMenus();
scene = new DiagramScene(itemMenu, this);
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() == Arrow::Type) {
scene->removeItem(item);
Arrow *arrow = qgraphicsitem_cast<Arrow *>(item);
arrow->startItem()->removeArrow(arrow);
arrow->endItem()->removeArrow(arrow);
delete item;
}
}
foreach (QGraphicsItem *item, scene->selectedItems()) {
if (item->type() == DiagramItem::Type)
qgraphicsitem_cast<DiagramItem *>(item)->removeArrows();
scene->removeItem(item);
delete 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",
qvariant_cast<QColor>(textAction->data())));
textButtonTriggered();
}
//! [12]
//! [13]
void MainWindow::itemColorChanged()
{
fillAction = qobject_cast<QAction *>(sender());
fillColorToolButton->setIcon(createColorToolButtonIcon(
":/images/floodfill.png",
qvariant_cast<QColor>(fillAction->data())));
fillButtonTriggered();
}
//! [13]
//! [14]
void MainWindow::lineColorChanged()
{
lineAction = qobject_cast<QAction *>(sender());
lineColorToolButton->setIcon(createColorToolButtonIcon(
":/images/linecolor.png",
qvariant_cast<QColor>(lineAction->data())));
lineButtonTriggered();
}
//! [14]
//! [15]
void MainWindow::textButtonTriggered()
{
scene->setTextColor(qvariant_cast<QColor>(textAction->data()));
}
//! [15]
//! [16]
void MainWindow::fillButtonTriggered()
{
scene->setItemColor(qvariant_cast<QColor>(fillAction->data()));
}
//! [16]
//! [17]
void MainWindow::lineButtonTriggered()
{
scene->setLineColor(qvariant_cast<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();
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(this);
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")));
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(this);
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+T"));
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("F1"));
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();
connect(fontCombo, SIGNAL(currentFontChanged(QFont)),
this, SLOT(currentFontChanged(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(QString)),
this, SLOT(fontSizeChanged(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(this);
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(QString)),
this, SLOT(sceneScaleChanged(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(this);
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);
// Draw icon centred horizontally on button.
QRect target(4, 0, 42, 43);
QRect source(0, 0, 42, 43);
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]