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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.
        **
        ** Licensees holding valid Qt Preview licenses may use this file in
        ** accordance with the Qt Preview License Agreement provided with the
        ** Software.
        **
        ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
        ** information about Qt Commercial License Agreements.
        **
        ** Contact info@trolltech.com if any conditions of this licensing are
        ** not clear to you.
        **
        ** 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::convertSeparators(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);
            }
        }