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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #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, &DiagramScene::itemInserted,
++ this, &MainWindow::itemInserted);
++ connect(scene, &DiagramScene::textInserted,
++ this, &MainWindow::textInserted);
++ connect(scene, &DiagramScene::itemSelected,
++ this, &MainWindow::itemSelected);
++ 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)
++ {
++ const QList<QAbstractButton *> buttons = backgroundButtonGroup->buttons();
++ for (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(QAbstractButton *button)
++ {
++ const QList<QAbstractButton *> buttons = buttonGroup->buttons();
++ for (QAbstractButton *myButton : buttons) {
++ if (myButton != button)
++ button->setChecked(false);
++ }
++ const int id = buttonGroup->id(button);
++ if (id == InsertTextButton) {
++ scene->setMode(DiagramScene::InsertText);
++ } else {
++ scene->setItemType(DiagramItem::DiagramType(id));
++ scene->setMode(DiagramScene::InsertItem);
++ }
++ }
++ //! [2]
++
++ //! [3]
++ void MainWindow::deleteItem()
++ {
++ QList<QGraphicsItem *> selectedItems = scene->selectedItems();
++ for (QGraphicsItem *item : std::as_const(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;
++ }
++ }
++
++ selectedItems = scene->selectedItems();
++ for (QGraphicsItem *item : std::as_const(selectedItems)) {
++ if (item->type() == DiagramItem::Type)
++ qgraphicsitem_cast<DiagramItem *>(item)->removeArrows();
++ scene->removeItem(item);
++ delete item;
++ }
++ }
++ //! [3]
++
++ //! [4]
++ void MainWindow::pointerGroupClicked()
++ {
++ scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId()));
++ }
++ //! [4]
++
++ //! [5]
++ void MainWindow::bringToFront()
++ {
++ if (scene->selectedItems().isEmpty())
++ return;
++
++ QGraphicsItem *selectedItem = scene->selectedItems().first();
++ const QList<QGraphicsItem *> overlapItems = selectedItem->collidingItems();
++
++ qreal zValue = 0;
++ for (const 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();
++ const QList<QGraphicsItem *> overlapItems = selectedItem->collidingItems();
++
++ qreal zValue = 0;
++ for (const 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;
++ QTransform oldMatrix = view->transform();
++ view->resetTransform();
++ 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, QOverload<QAbstractButton *>::of(&QButtonGroup::buttonClicked),
++ this, &MainWindow::buttonGroupClicked);
++ 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, QOverload<QAbstractButton *>::of(&QButtonGroup::buttonClicked),
++ this, &MainWindow::backgroundButtonGroupClicked);
++
++ 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, &QAction::triggered, this, &MainWindow::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, &QAction::triggered, this, &MainWindow::sendToBack);
++
++ deleteAction = new QAction(QIcon(":/images/delete.png"), tr("&Delete"), this);
++ deleteAction->setShortcut(tr("Delete"));
++ deleteAction->setStatusTip(tr("Delete item from diagram"));
++ connect(deleteAction, &QAction::triggered, this, &MainWindow::deleteItem);
++
++ exitAction = new QAction(tr("E&xit"), this);
++ exitAction->setShortcuts(QKeySequence::Quit);
++ exitAction->setStatusTip(tr("Quit Scenediagram example"));
++ connect(exitAction, &QAction::triggered, this, &QWidget::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, &QAction::triggered, this, &MainWindow::handleFontChange);
++
++ italicAction = new QAction(QIcon(":/images/italic.png"), tr("Italic"), this);
++ italicAction->setCheckable(true);
++ italicAction->setShortcut(tr("Ctrl+I"));
++ connect(italicAction, &QAction::triggered, this, &MainWindow::handleFontChange);
++
++ underlineAction = new QAction(QIcon(":/images/underline.png"), tr("Underline"), this);
++ underlineAction->setCheckable(true);
++ underlineAction->setShortcut(tr("Ctrl+U"));
++ connect(underlineAction, &QAction::triggered, this, &MainWindow::handleFontChange);
++
++ aboutAction = new QAction(tr("A&bout"), this);
++ aboutAction->setShortcut(tr("F1"));
++ connect(aboutAction, &QAction::triggered, this, &MainWindow::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, &QFontComboBox::currentFontChanged,
++ this, &MainWindow::currentFontChanged);
++
++ 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, &QComboBox::currentTextChanged,
++ this, &MainWindow::fontSizeChanged);
++
++ fontColorToolButton = new QToolButton;
++ fontColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
++ fontColorToolButton->setMenu(createColorMenu(&MainWindow::textColorChanged, Qt::black));
++ textAction = fontColorToolButton->menu()->defaultAction();
++ fontColorToolButton->setIcon(createColorToolButtonIcon(":/images/textpointer.png", Qt::black));
++ fontColorToolButton->setAutoFillBackground(true);
++ connect(fontColorToolButton, &QAbstractButton::clicked,
++ this, &MainWindow::textButtonTriggered);
++
++ //! [26]
++ fillColorToolButton = new QToolButton;
++ fillColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
++ fillColorToolButton->setMenu(createColorMenu(&MainWindow::itemColorChanged, Qt::white));
++ fillAction = fillColorToolButton->menu()->defaultAction();
++ fillColorToolButton->setIcon(createColorToolButtonIcon(
++ ":/images/floodfill.png", Qt::white));
++ connect(fillColorToolButton, &QAbstractButton::clicked,
++ this, &MainWindow::fillButtonTriggered);
++ //! [26]
++
++ lineColorToolButton = new QToolButton;
++ lineColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
++ lineColorToolButton->setMenu(createColorMenu(&MainWindow::lineColorChanged, Qt::black));
++ lineAction = lineColorToolButton->menu()->defaultAction();
++ lineColorToolButton->setIcon(createColorToolButtonIcon(
++ ":/images/linecolor.png", Qt::black));
++ connect(lineColorToolButton, &QAbstractButton::clicked,
++ this, &MainWindow::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, QOverload<QAbstractButton *>::of(&QButtonGroup::buttonClicked),
++ this, &MainWindow::pointerGroupClicked);
++
++ sceneScaleCombo = new QComboBox;
++ QStringList scales;
++ scales << tr("50%") << tr("75%") << tr("100%") << tr("125%") << tr("150%");
++ sceneScaleCombo->addItems(scales);
++ sceneScaleCombo->setCurrentIndex(2);
++ connect(sceneScaleCombo, &QComboBox::currentTextChanged,
++ this, &MainWindow::sceneScaleChanged);
++
++ 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]
++ template<typename PointerToMemberFunction>
++ QMenu *MainWindow::createColorMenu(const PointerToMemberFunction &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, &QAction::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]