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

     /****************************************************************************
     **
     ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License version 2.0 as published by the Free Software Foundation
     ** and appearing in the file LICENSE.GPL included in the packaging of
     ** this file.  Please review the following information to ensure GNU
     ** General Public Licensing requirements will be met:
     ** http://www.trolltech.com/products/qt/opensource.html
     **
     ** If you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://www.trolltech.com/products/qt/licensing.html or contact the
     ** sales department at sales@trolltech.com.
     **
     ** 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 "interfaces.h"
     #include "plugindialog.h"

     PluginDialog::PluginDialog(const QString &path, const QStringList &fileNames,
                                QWidget *parent)
         : QDialog(parent)
     {
         label = new QLabel;

         treeWidget = new QTreeWidget;
         treeWidget->setAlternatingRowColors(false);
         treeWidget->setSelectionMode(QAbstractItemView::NoSelection);
         treeWidget->setColumnCount(1);
         treeWidget->header()->hide();

         okButton = new QPushButton(tr("OK"));
         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)));

         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);
         }
     }