Like the QQ Game Hall navigation tree control

In the recent project, you need to implement a similar QQ game Hall navigation tree control. Referring to some of the information on the network, the do-it-yourself produced a class CTREECTRLBT. The interface is as follows:

Implementation steps

Step one: Create a new MFC project based on the dialog box, and drag a standard tree control over the interface. Add a new class CTREECTRLBT derived from CTreeCtrl.

Step Two: Add some message responses and virtual functions to the class. Its detailed role is as follows:

void Presubclasswindow (); To add information about the initialization control

Processing of wm_size//control areas when changes occur

WM_PAINT//Drawing controls

Wm_mousemove//main Gets the cell item where the mouse is located

Step three: TreeCtrlBT.h first declares a structure to hold information about the cell items and puts the information of all items into a map. The implementation code is as follows:typedef struct tagItemMsg
{
　　HTREEITEM hItem;　//项的句柄
　　CBitmap　 ItemBitmap;　//项的位图
　　COLORREF　crTransparent;　//透明颜色
　　tagItemMsg()
　　　　{
　　　　hItem　 = NULL;

　　　　crTransparent = RGB(255,255,255);
　　　　}

　　~tagItemMsg()
　　　　{
　　　　if ( ItemBitmap.GetSafeHandle() )
　　　　　　{
　　　　　　 ItemBitmap.DeleteObject();
　　　　　　}
　　　　}
}ITEM_MSG;
typedef map<HTREEITEM,ITEM_MSG*>　　ITEMMSG_MAP;