mainwindow.cpp

奇趣公司比较新的qt/emd版本

    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);


    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"));
}

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()));

    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->setShortcut(tr("Ctrl+X"));
    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()));
}

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);
}

void MainWindow::createToolbars()
{
    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()));

    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()));

    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);
}

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;
}

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;
}

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;
}

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);
}

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);
}