plugindialog.h Example File
tools/plugandpaint/plugindialog.h

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 #ifndef PLUGINDIALOG_H
 #define PLUGINDIALOG_H

 #include <QDialog>
 #include <QIcon>

 class QLabel;
 class QPushButton;
 class QStringList;
 class QTreeWidget;
 class QTreeWidgetItem;

 class PluginDialog : public QDialog
 {
     Q_OBJECT

 public:
     PluginDialog(const QString &path, const QStringList &fileNames,
                  QWidget *parent = 0);

 private:
     void findPlugins(const QString &path, const QStringList &fileNames);
     void populateTreeWidget(QObject *plugin, const QString &text);
     void addItems(QTreeWidgetItem *pluginItem, const char *interfaceName,
                   const QStringList &features);

     QLabel *label;
     QTreeWidget *treeWidget;
     QPushButton *okButton;
     QIcon interfaceIcon;
     QIcon featureIcon;
 };

 #endif