Qt 4.3: iconpreviewarea.cpp Example File (widgets/icons/iconpreviewarea.cpp)

|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# iconpreviewarea.cpp Example File
widgets/icons/iconpreviewarea.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the documentation of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
    ** License versions 2.0 or 3.0 as published by the Free Software
    ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
    ** included in the packaging of this file.  Alternatively you may (at
    ** your option) use any later version of the GNU General Public
    ** License if such license has been publicly approved by Trolltech ASA
    ** (or its successors, if any) and the KDE Free Qt Foundation. In
    ** addition, as a special exception, Trolltech gives you certain
    ** additional rights. These rights are described in the Trolltech GPL
    ** Exception version 1.2, which can be found at
    ** http://www.trolltech.com/products/qt/gplexception/ and in the file
    ** GPL_EXCEPTION.txt in this package.
    **
    ** Please review the following information to ensure GNU General
    ** Public Licensing requirements will be met:
    ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
    ** you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
    ** or contact the sales department at sales@trolltech.com.
    **
    ** In addition, as a special exception, Trolltech, as the sole
    ** copyright holder for Qt Designer, grants users of the Qt/Eclipse
    ** Integration plug-in the right for the Qt/Eclipse Integration to
    ** link to functionality provided by Qt Designer and its related
    ** libraries.
    **
    ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
    ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
    ** granted herein.
     **
     ** 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 <QtGui>

     #include "iconpreviewarea.h"

     IconPreviewArea::IconPreviewArea(QWidget *parent)
         : QWidget(parent)
     {
         QGridLayout *mainLayout = new QGridLayout;
         setLayout(mainLayout);

         stateLabels[0] = createHeaderLabel(tr("Off"));
         stateLabels[1] = createHeaderLabel(tr("On"));
         Q_ASSERT(NumStates == 2);

         modeLabels[0] = createHeaderLabel(tr("Normal"));
         modeLabels[1] = createHeaderLabel(tr("Active"));
         modeLabels[2] = createHeaderLabel(tr("Disabled"));
         modeLabels[3] = createHeaderLabel(tr("Selected"));
         Q_ASSERT(NumModes == 4);

         for (int j = 0; j < NumStates; ++j)
             mainLayout->addWidget(stateLabels[j], j + 1, 0);

         for (int i = 0; i < NumModes; ++i) {
             mainLayout->addWidget(modeLabels[i], 0, i + 1);

             for (int j = 0; j < NumStates; ++j) {
                 pixmapLabels[i][j] = createPixmapLabel();
                 mainLayout->addWidget(pixmapLabels[i][j], j + 1, i + 1);
             }
         }
     }

     void IconPreviewArea::setIcon(const QIcon &icon)
     {
         this->icon = icon;
         updatePixmapLabels();
     }

     void IconPreviewArea::setSize(const QSize &size)
     {
         if (size != this->size) {
             this->size = size;
             updatePixmapLabels();
         }
     }

     QLabel *IconPreviewArea::createHeaderLabel(const QString &text)
     {
         QLabel *label = new QLabel(tr("<b>%1</b>").arg(text));
         label->setAlignment(Qt::AlignCenter);
         return label;
     }

     QLabel *IconPreviewArea::createPixmapLabel()
     {
         QLabel *label = new QLabel;
         label->setEnabled(false);
         label->setAlignment(Qt::AlignCenter);
         label->setFrameShape(QFrame::Box);
         label->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
         label->setBackgroundRole(QPalette::Base);
         label->setAutoFillBackground(true);
         label->setMinimumSize(132, 132);
         return label;
     }

     void IconPreviewArea::updatePixmapLabels()
     {
         for (int i = 0; i < NumModes; ++i) {
             QIcon::Mode mode;
             if (i == 0) {
                 mode = QIcon::Normal;
             } else if (i == 1) {
                 mode = QIcon::Active;
             } else if (i == 2) {
                 mode = QIcon::Disabled;
             } else {
                 mode = QIcon::Selected;
             }

             for (int j = 0; j < NumStates; ++j) {
                 QIcon::State state = (j == 0) ? QIcon::Off : QIcon::On;
                 QPixmap pixmap = icon.pixmap(size, mode, state);
                 pixmapLabels[i][j]->setPixmap(pixmap);
                 pixmapLabels[i][j]->setEnabled(!pixmap.isNull());
             }
         }
     }