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# window.cpp Example File
script/context2d/window.cpp

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     #include "window.h"
     #include "qcontext2dcanvas.h"
     #include <QHBoxLayout>
     #include <QListWidget>
     #include <QDir>

     static QString scriptsDir()
     {
         if (QFile::exists("./scripts"))
             return "./scripts";
         return ":/scripts";
     }

     Window::Window(QWidget *parent)
         : QWidget(parent)
     {
         QHBoxLayout *hbox = new QHBoxLayout(this);
         QListWidget *view = new QListWidget(this);
         view->setEditTriggers(QAbstractItemView::NoEditTriggers);
         canvas = new QContext2DCanvas(this);
         canvas->setFixedSize(150, 150);
         hbox->addWidget(view);
         hbox->addWidget(canvas);

         QDir dir(scriptsDir());
         QFileInfoList entries = dir.entryInfoList(QStringList() << "*.js");
         for (int i = 0; i < entries.size(); ++i)
             view->addItem(entries.at(i).fileName());
         connect(view, SIGNAL(currentItemChanged(QListWidgetItem*, QListWidgetItem*)),
                 this, SLOT(selectScript(QListWidgetItem*)));

         setWindowTitle(tr("Context 2D"));
     }

     void Window::selectScript(QListWidgetItem *item)
     {
         QFile file(scriptsDir() + "/" + item->text());
         file.open(QIODevice::ReadOnly);
         QString contents = file.readAll();
         file.close();
         canvas->setScriptContents(contents);
     }