toolbar.cpp Example File | Qt Widgets 5.12.9

- Qt 5.12
- Qt Widgets
- Main Window
- toolbar.cpp Example File
- Qt 5.12.9 Reference Documentation

# toolbar.cpp Example File

mainwindows/mainwindow/toolbar.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2016 The Qt Company Ltd.
     ** Contact: https://www.qt.io/licensing/
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** Commercial License Usage
     ** Licensees holding valid commercial Qt licenses may use this file in
     ** accordance with the commercial license agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and The Qt Company. For licensing terms
     ** and conditions see https://www.qt.io/terms-conditions. For further
     ** information use the contact form at https://www.qt.io/contact-us.
     **
     ** BSD License Usage
     ** 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.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of The Qt Company Ltd nor the names of its
     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #include "toolbar.h"

     #include <QRandomGenerator>

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

     #include <stdlib.h>

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

         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);

         QPixmap pm = QPixmap::fromImage(image, Qt::DiffuseDither | Qt::DiffuseAlphaDither);
         pm.setDevicePixelRatio(pixelRatio);
         return pm;
     }

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

     ToolBar::ToolBar(const QString &title, QWidget *parent)
         : QToolBar(parent)
         , spinbox(nullptr)
         , spinboxAction(nullptr)
     {
         setWindowTitle(title);
         setObjectName(title);

         setIconSize(QSize(32, 32));

         qreal dpr = devicePixelRatioF();
         menu = new QMenu("One", this);
         menu->setIcon(genIcon(iconSize(), 1, Qt::black, dpr));
         menu->addAction(genIcon(iconSize(), "A", Qt::blue, dpr), "A");
         menu->addAction(genIcon(iconSize(), "B", Qt::blue, dpr), "B");
         menu->addAction(genIcon(iconSize(), "C", Qt::blue, dpr), "C");
         addAction(menu->menuAction());

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

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

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

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

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

         movableAction = new QAction(tr("Movable"), this);
         movableAction->setCheckable(true);
         connect(movableAction, &QAction::triggered, this, &ToolBar::changeMovable);

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

         allowLeftAction = new QAction(tr("Allow on Left"), this);
         allowLeftAction->setCheckable(true);
         connect(allowLeftAction, &QAction::triggered, this, &ToolBar::allowLeft);

         allowRightAction = new QAction(tr("Allow on Right"), this);
         allowRightAction->setCheckable(true);
         connect(allowRightAction, &QAction::triggered, this, &ToolBar::allowRight);

         allowTopAction = new QAction(tr("Allow on Top"), this);
         allowTopAction->setCheckable(true);
         connect(allowTopAction, &QAction::triggered, this, &ToolBar::allowTop);

         allowBottomAction = new QAction(tr("Allow on Bottom"), this);
         allowBottomAction->setCheckable(true);
         connect(allowBottomAction, &QAction::triggered, this, &ToolBar::allowBottom);

         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, &QAction::triggered, this, &ToolBar::placeLeft);

         rightAction = new QAction(tr("Place on Right") , this);
         rightAction->setCheckable(true);
         connect(rightAction, &QAction::triggered, this, &ToolBar::placeRight);

         topAction = new QAction(tr("Place on Top") , this);
         topAction->setCheckable(true);
         connect(topAction, &QAction::triggered, this, &ToolBar::placeTop);

         bottomAction = new QAction(tr("Place on Bottom") , this);
         bottomAction->setCheckable(true);
         connect(bottomAction, &QAction::triggered, this, &ToolBar::placeBottom);

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

         connect(movableAction, &QAction::triggered, areaActions, &QActionGroup::setEnabled);

         connect(movableAction, &QAction::triggered, allowedAreasActions, &QActionGroup::setEnabled);

         menu = new QMenu(title, 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());
         menu->addSeparator();
         menu->addAction(tr("Insert break"), this, &ToolBar::insertToolBarBreak);

         connect(menu, &QMenu::aboutToShow, this, &ToolBar::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;
         QList<QAction *> actions1 = actions();
         foreach (QAction *action, findChildren<QAction *>()) {
             if (!actions1.contains(action))
                 continue;
             actions1.removeAll(action);
             ordered.append(action);
         }

         clear();
         addActions(ordered);

         orderAction->setEnabled(false);
     }

     void ToolBar::randomize()
     {
         QList<QAction *> randomized;
         QList<QAction *> actions = this->actions();
         while (!actions.isEmpty()) {
             QAction *action = actions.takeAt(QRandomGenerator::global()->bounded(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); }

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

         mainWindow->insertToolBarBreak(this);
     }