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# toolbar.cpp Example File
demos/mainwindow/toolbar.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the demonstration applications of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #include "toolbar.h"

    #include <QMainWindow>
    #include <QMenu>
    #include <QPainter>
    #include <QPainterPath>
    #include <QSpinBox>

    #include <stdlib.h>

    static QPixmap genIcon(const QSize &iconSize, const QString &, const QColor &color)
    {
        int w = iconSize.width();
        int h = iconSize.height();

        QImage image(w, h, QImage::Format_ARGB32_Premultiplied);
        image.fill(0);

        QPainter p(&image);

        extern void render_qt_text(QPainter *, int, int, const QColor &);
        render_qt_text(&p, w, h, color);

        return QPixmap::fromImage(image, Qt::DiffuseDither | Qt::DiffuseAlphaDither);
    }

    static QPixmap genIcon(const QSize &iconSize, int number, const QColor &color)
    { return genIcon(iconSize, QString::number(number), color); }

    ToolBar::ToolBar(QWidget *parent)
        : QToolBar(parent), spinbox(0), spinboxAction(0)
    {
        setWindowTitle(tr("Main Tool Bar"));
        setObjectName("MainToolBar");

        setIconSize(QSize(32, 32));

        QColor bg(palette().background().color());
        menu = new QMenu("One", this);
        menu->setIcon(genIcon(iconSize(), 1, Qt::black));
        menu->addAction(genIcon(iconSize(), "A", Qt::blue), "A");
        menu->addAction(genIcon(iconSize(), "B", Qt::blue), "B");
        menu->addAction(genIcon(iconSize(), "C", Qt::blue), "C");
        addAction(menu->menuAction());

        QAction *two = addAction(genIcon(iconSize(), 2, Qt::white), "Two");
        QFont boldFont;
        boldFont.setBold(true);
        two->setFont(boldFont);

        addAction(genIcon(iconSize(), 3, Qt::red), "Three");
        addAction(genIcon(iconSize(), 4, Qt::green), "Four");
        addAction(genIcon(iconSize(), 5, Qt::blue), "Five");
        addAction(genIcon(iconSize(), 6, Qt::yellow), "Six");
        orderAction = new QAction(this);
        orderAction->setText(tr("Order Items in Tool Bar"));
        connect(orderAction, SIGNAL(triggered()), SLOT(order()));

        randomizeAction = new QAction(this);
        randomizeAction->setText(tr("Randomize Items in Tool Bar"));
        connect(randomizeAction, SIGNAL(triggered()), SLOT(randomize()));

        addSpinBoxAction = new QAction(this);
        addSpinBoxAction->setText(tr("Add Spin Box"));
        connect(addSpinBoxAction, SIGNAL(triggered()), SLOT(addSpinBox()));

        removeSpinBoxAction = new QAction(this);
        removeSpinBoxAction->setText(tr("Remove Spin Box"));
        removeSpinBoxAction->setEnabled(false);
        connect(removeSpinBoxAction, SIGNAL(triggered()), SLOT(removeSpinBox()));

        movableAction = new QAction(tr("Movable"), this);
        movableAction->setCheckable(true);
        connect(movableAction, SIGNAL(triggered(bool)), SLOT(changeMovable(bool)));

        allowedAreasActions = new QActionGroup(this);
        allowedAreasActions->setExclusive(false);

        allowLeftAction = new QAction(tr("Allow on Left"), this);
        allowLeftAction->setCheckable(true);
        connect(allowLeftAction, SIGNAL(triggered(bool)), SLOT(allowLeft(bool)));

        allowRightAction = new QAction(tr("Allow on Right"), this);
        allowRightAction->setCheckable(true);
        connect(allowRightAction, SIGNAL(triggered(bool)), SLOT(allowRight(bool)));

        allowTopAction = new QAction(tr("Allow on Top"), this);
        allowTopAction->setCheckable(true);
        connect(allowTopAction, SIGNAL(triggered(bool)), SLOT(allowTop(bool)));

        allowBottomAction = new QAction(tr("Allow on Bottom"), this);
        allowBottomAction->setCheckable(true);
        connect(allowBottomAction, SIGNAL(triggered(bool)), SLOT(allowBottom(bool)));

        allowedAreasActions->addAction(allowLeftAction);
        allowedAreasActions->addAction(allowRightAction);
        allowedAreasActions->addAction(allowTopAction);
        allowedAreasActions->addAction(allowBottomAction);

        areaActions = new QActionGroup(this);
        areaActions->setExclusive(true);

        leftAction = new QAction(tr("Place on Left") , this);
        leftAction->setCheckable(true);
        connect(leftAction, SIGNAL(triggered(bool)), SLOT(placeLeft(bool)));

        rightAction = new QAction(tr("Place on Right") , this);
        rightAction->setCheckable(true);
        connect(rightAction, SIGNAL(triggered(bool)), SLOT(placeRight(bool)));

        topAction = new QAction(tr("Place on Top") , this);
        topAction->setCheckable(true);
        connect(topAction, SIGNAL(triggered(bool)), SLOT(placeTop(bool)));

        bottomAction = new QAction(tr("Place on Bottom") , this);
        bottomAction->setCheckable(true);
        connect(bottomAction, SIGNAL(triggered(bool)), SLOT(placeBottom(bool)));

        areaActions->addAction(leftAction);
        areaActions->addAction(rightAction);
        areaActions->addAction(topAction);
        areaActions->addAction(bottomAction);

        connect(movableAction, SIGNAL(triggered(bool)), areaActions, SLOT(setEnabled(bool)));

        connect(movableAction, SIGNAL(triggered(bool)), allowedAreasActions, SLOT(setEnabled(bool)));

        menu = new QMenu(tr("&Toolbar"), this);
        menu->addAction(toggleViewAction());
        menu->addSeparator();
        menu->addAction(orderAction);
        menu->addAction(randomizeAction);
        menu->addSeparator();
        menu->addAction(addSpinBoxAction);
        menu->addAction(removeSpinBoxAction);
        menu->addSeparator();
        menu->addAction(movableAction);
        menu->addSeparator();
        menu->addActions(allowedAreasActions->actions());
        menu->addSeparator();
        menu->addActions(areaActions->actions());

        connect(menu, SIGNAL(aboutToShow()), this, SLOT(updateMenu()));

        randomize();
    }

    void ToolBar::updateMenu()
    {
        QMainWindow *mainWindow = qobject_cast<QMainWindow *>(parentWidget());
        Q_ASSERT(mainWindow != 0);

        const Qt::ToolBarArea area = mainWindow->toolBarArea(this);
        const Qt::ToolBarAreas areas = allowedAreas();

        movableAction->setChecked(isMovable());

        allowLeftAction->setChecked(isAreaAllowed(Qt::LeftToolBarArea));
        allowRightAction->setChecked(isAreaAllowed(Qt::RightToolBarArea));
        allowTopAction->setChecked(isAreaAllowed(Qt::TopToolBarArea));
        allowBottomAction->setChecked(isAreaAllowed(Qt::BottomToolBarArea));

        if (allowedAreasActions->isEnabled()) {
            allowLeftAction->setEnabled(area != Qt::LeftToolBarArea);
            allowRightAction->setEnabled(area != Qt::RightToolBarArea);
            allowTopAction->setEnabled(area != Qt::TopToolBarArea);
            allowBottomAction->setEnabled(area != Qt::BottomToolBarArea);
        }

        leftAction->setChecked(area == Qt::LeftToolBarArea);
        rightAction->setChecked(area == Qt::RightToolBarArea);
        topAction->setChecked(area == Qt::TopToolBarArea);
        bottomAction->setChecked(area == Qt::BottomToolBarArea);

        if (areaActions->isEnabled()) {
            leftAction->setEnabled(areas & Qt::LeftToolBarArea);
            rightAction->setEnabled(areas & Qt::RightToolBarArea);
            topAction->setEnabled(areas & Qt::TopToolBarArea);
            bottomAction->setEnabled(areas & Qt::BottomToolBarArea);
        }
    }

    void ToolBar::order()
    {
        QList<QAction *> ordered, actions1 = actions(),
                                  actions2 = qFindChildren<QAction *>(this);
        while (!actions2.isEmpty()) {
            QAction *action = actions2.takeFirst();
            if (!actions1.contains(action))
                continue;
            actions1.removeAll(action);
            ordered.append(action);
        }

        clear();
        addActions(ordered);

        orderAction->setEnabled(false);
    }

    void ToolBar::randomize()
    {
        QList<QAction *> randomized, actions = this->actions();
        while (!actions.isEmpty()) {
            QAction *action = actions.takeAt(rand() % actions.size());
            randomized.append(action);
        }
        clear();
        addActions(randomized);

        orderAction->setEnabled(true);
    }

    void ToolBar::addSpinBox()
    {
        if (!spinbox) {
            spinbox = new QSpinBox(this);
        }
        if (!spinboxAction)
            spinboxAction = addWidget(spinbox);
        else
            addAction(spinboxAction);

        addSpinBoxAction->setEnabled(false);
        removeSpinBoxAction->setEnabled(true);
    }

    void ToolBar::removeSpinBox()
    {
        if (spinboxAction)
            removeAction(spinboxAction);

        addSpinBoxAction->setEnabled(true);
        removeSpinBoxAction->setEnabled(false);
    }

    void ToolBar::allow(Qt::ToolBarArea area, bool a)
    {
        Qt::ToolBarAreas areas = allowedAreas();
        areas = a ? areas | area : areas & ~area;
        setAllowedAreas(areas);

        if (areaActions->isEnabled()) {
            leftAction->setEnabled(areas & Qt::LeftToolBarArea);
            rightAction->setEnabled(areas & Qt::RightToolBarArea);
            topAction->setEnabled(areas & Qt::TopToolBarArea);
            bottomAction->setEnabled(areas & Qt::BottomToolBarArea);
        }
    }

    void ToolBar::place(Qt::ToolBarArea area, bool p)
    {
        if (!p)
            return;

        QMainWindow *mainWindow = qobject_cast<QMainWindow *>(parentWidget());
        Q_ASSERT(mainWindow != 0);

        mainWindow->addToolBar(area, this);

        if (allowedAreasActions->isEnabled()) {
            allowLeftAction->setEnabled(area != Qt::LeftToolBarArea);
            allowRightAction->setEnabled(area != Qt::RightToolBarArea);
            allowTopAction->setEnabled(area != Qt::TopToolBarArea);
            allowBottomAction->setEnabled(area != Qt::BottomToolBarArea);
        }
    }

    void ToolBar::changeMovable(bool movable)
    { setMovable(movable); }

    void ToolBar::allowLeft(bool a)
    { allow(Qt::LeftToolBarArea, a); }

    void ToolBar::allowRight(bool a)
    { allow(Qt::RightToolBarArea, a); }

    void ToolBar::allowTop(bool a)
    { allow(Qt::TopToolBarArea, a); }

    void ToolBar::allowBottom(bool a)
    { allow(Qt::BottomToolBarArea, a); }

    void ToolBar::placeLeft(bool p)
    { place(Qt::LeftToolBarArea, p); }

    void ToolBar::placeRight(bool p)
    { place(Qt::RightToolBarArea, p); }

    void ToolBar::placeTop(bool p)
    { place(Qt::TopToolBarArea, p); }

    void ToolBar::placeBottom(bool p)
    { place(Qt::BottomToolBarArea, p); }