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

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        **
        ** Copyright (C) 1992-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
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    **   information about Qt Commercial License Agreements.
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    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
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        #include "toolbar.h"

        #include <qmainwindow.h>
        #include <qmenu.h>
        #include <qpainter.h>
        #include <qpainterpath.h>
        #include <qspinbox.h>

        #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"));

            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());

            randomize();
        }

        void ToolBar::polishEvent(QEvent *)
        {
            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); }