QT Mini Application

The job is to develop a QT (4.7) mini application. Features: - MDI app (you can use the QT MDI sample) - Own child dialog with a QTreeWidegt on it. Subclass from QDialog? - Subclass the QTreeWidget to CommonTreeWidget (Own class) - Subclass the QTreeWidgetItem to QDataItem. The QDataItem contains an additionl type value for identify as File or Folder. - QDataItem will have two functions: AddFileIcon and AddFolderIcon - Add three functions to the mainapp: InsertItem,DeleteItem, and InsertNode. The click will throw the message to the active child window. The insert function with Item and tree handle will be in the CommonTreeWidget. A file is a child item of a node. A node is always a folder. It mus be impossible to add a node to a file. or a file to a child. Important is a well subclassed QTreeWidgetItem. The CommonTreeWidget need the possibility to work with the subclassed QTreeWidgetItem like with the original one.