Qt 4.6: plugindialog.cpp Example File (tools/plugandpaint/plugindialog.cpp)

|  | Home · All Classes · Overviews |

# plugindialog.cpp Example File
tools/plugandpaint/plugindialog.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** No Commercial Usage
     ** This file contains pre-release code and may not be distributed.
     ** You may use this file in accordance with the terms and conditions
     ** contained in the Technology Preview License Agreement accompanying
     ** this package.
     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
     ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
     **
     ** In addition, as a special exception, Nokia gives you certain
     ** additional rights.  These rights are described in the Nokia Qt LGPL
     ** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
     ** package.
     **
     ** If you have questions regarding the use of this file, please contact
     ** Nokia at qt-info@nokia.com.
     **
     **
     **
     **
     **
     **
     **
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #include "interfaces.h"
     #include "plugindialog.h"

     #include <QPluginLoader>
     #include <QStringList>
     #include <QDir>

     #include <QLabel>
     #include <QGridLayout>
     #include <QPushButton>
     #include <QTreeWidget>
     #include <QTreeWidgetItem>
     #include <QHeaderView>

     PluginDialog::PluginDialog(const QString &path, const QStringList &fileNames,
                                QWidget *parent) :
         QDialog(parent),
         label(new QLabel),
         treeWidget(new QTreeWidget),
         okButton(new QPushButton(tr("OK")))
     {
         treeWidget->setAlternatingRowColors(false);
         treeWidget->setSelectionMode(QAbstractItemView::NoSelection);
         treeWidget->setColumnCount(1);
         treeWidget->header()->hide();

         okButton->setDefault(true);

         connect(okButton, SIGNAL(clicked()), this, SLOT(close()));

         QGridLayout *mainLayout = new QGridLayout;
         mainLayout->setColumnStretch(0, 1);
         mainLayout->setColumnStretch(2, 1);
         mainLayout->addWidget(label, 0, 0, 1, 3);
         mainLayout->addWidget(treeWidget, 1, 0, 1, 3);
         mainLayout->addWidget(okButton, 2, 1);
         setLayout(mainLayout);

         interfaceIcon.addPixmap(style()->standardPixmap(QStyle::SP_DirOpenIcon),
                                 QIcon::Normal, QIcon::On);
         interfaceIcon.addPixmap(style()->standardPixmap(QStyle::SP_DirClosedIcon),
                                 QIcon::Normal, QIcon::Off);
         featureIcon.addPixmap(style()->standardPixmap(QStyle::SP_FileIcon));

         setWindowTitle(tr("Plugin Information"));
         findPlugins(path, fileNames);
     }

     void PluginDialog::findPlugins(const QString &path,
                                    const QStringList &fileNames)
     {
         label->setText(tr("Plug & Paint found the following plugins\n"
                           "(looked in %1):")
                        .arg(QDir::toNativeSeparators(path)));

         const QDir dir(path);

         foreach (QObject *plugin, QPluginLoader::staticInstances())
             populateTreeWidget(plugin, tr("%1 (Static Plugin)")
                                        .arg(plugin->metaObject()->className()));

         foreach (QString fileName, fileNames) {
             QPluginLoader loader(dir.absoluteFilePath(fileName));
             QObject *plugin = loader.instance();
             if (plugin)
                 populateTreeWidget(plugin, fileName);
         }
     }

     void PluginDialog::populateTreeWidget(QObject *plugin, const QString &text)
     {
         QTreeWidgetItem *pluginItem = new QTreeWidgetItem(treeWidget);
         pluginItem->setText(0, text);
         treeWidget->setItemExpanded(pluginItem, true);

         QFont boldFont = pluginItem->font(0);
         boldFont.setBold(true);
         pluginItem->setFont(0, boldFont);

         if (plugin) {
             BrushInterface *iBrush = qobject_cast<BrushInterface *>(plugin);
             if (iBrush)
                 addItems(pluginItem, "BrushInterface", iBrush->brushes());

             ShapeInterface *iShape = qobject_cast<ShapeInterface *>(plugin);
             if (iShape)
                 addItems(pluginItem, "ShapeInterface", iShape->shapes());

             FilterInterface *iFilter =
                     qobject_cast<FilterInterface *>(plugin);
             if (iFilter)
                 addItems(pluginItem, "FilterInterface", iFilter->filters());
         }
     }

     void PluginDialog::addItems(QTreeWidgetItem *pluginItem,
                                 const char *interfaceName,
                                 const QStringList &features)
     {
         QTreeWidgetItem *interfaceItem = new QTreeWidgetItem(pluginItem);
         interfaceItem->setText(0, interfaceName);
         interfaceItem->setIcon(0, interfaceIcon);

         foreach (QString feature, features) {
             if (feature.endsWith("..."))
                 feature.chop(3);
             QTreeWidgetItem *featureItem = new QTreeWidgetItem(interfaceItem);
             featureItem->setText(0, feature);
             featureItem->setIcon(0, featureIcon);
         }
     }