Visual C++ and MFC Programming 2nd Edition

Visual C++ and MFC Fundamentals Chapter 21: Tree and List Controls

7. Close it and return to MSVC

21.2 The Tree View.............................................................................................

21.2.1..Overview...............................................................................................

A tree view is a frame-based application whose view uses the characteristics of a tree

control. To create such an application, you can work from scratch and derive a class from

CTreeView. Alternatively, you can use the MFC Application wizard to create the

application.

As a tree control is based on the CTreeCtrl class, a tree view application uses the

Document/View Architecture to implement its behavior rather than using a dialog box.

This class simply implements the tree control on a application and provides all the

functionality of the CTreeCtrl class.

21.2.2..Tree View Implementation................................................................

To create a tree view application, you can create a form-based application, place a tree

control on it, and do anything reviewed above. Alternatively, you can derive your own

class from CTreeView. Instead, the MFC provides a faster and better means of creating a

tree view, using the MFC Application wizard for which you would select CTreeView as

the Base Class.

We saw that a tree control can be programmatically created by calling the

CTreeCtrl::Create() method. This allows you to define the style used on the control.

When using the tree view, you can specify the initial style in the PreCreateWindow()

event of the view class. Here is an example:

BOOL CExoTV2View::PreCreateWindow(CREATESTRUCT& cs)

{

cs.style |= TVS_HASLINES | TVS_HASBUTTONS |

TVS_LINESATROOT | TVS_EDITLABELS;

return CTreeView::PreCreateWindow(cs);

}