VC: CTreeCtrl

(Create an image linked list, load bitmap and add it to an image linked list, create a view control, set a view control image linked list, create a structure to insert a Tree View, set properties, and obtain the returned handle as a node) continue operation ...)

1. Basic Knowledge:

HICON hIcon [3];

Int n;

M_imagelist.Create (16, 16, 0, 8 );

// M_imagelist.Create (32, 32, 8 );

HIcon [0] = AfxGetApp ()-> LoadIcon (IDI_ICON1 );

HIcon [1] = AfxGetApp ()-> LoadIcon (IDI_ICON2 );

HIcon [2] = AfxGetApp ()-> LoadIcon (IDI_ICON3 );

HIcon [3] = AfxGetApp ()-> LoadIcon (IDI_ICON4 );

 

 

For (n = 0; n <4; n ++)

{

M_imagelist.Add (hIcon [n]);

}

CTreeCtrl * pTree = (CTreeCtrl *) GetDlgItem (IDC_TREE1 );

PTree-> SetImageList (& m_imagelist, TVSIL_NORMAL );

TV _INSERTSTRUCT tvinsert;

Tvinsert. hParent = NULL;

Tvinsert. hInsertAfter = TVI_LAST;

Tvinsert. item. mask = TVIF_IMAGE | TVIF_SELECTEDIMAGE | TVIF_TEXT;

 

// Tvinsert. item. hItem = NULL;

Tvinsert. item. hItem = TVI_ROOT;

Tvinsert. item. state = 0;

Tvinsert. item. stateMask = 0;

Tvinsert. item. cchTextMax = 6;

Tvinsert. item. iSelectedImage = 3;

Tvinsert. item. cChildren = 0;

Tvinsert. item. lParam = 0;

// The first layer

Tvinsert. item. pszText = "school ";

Tvinsert. item. iImage = 0;

HTREEITEM hDad = pTree-> InsertItem (& tvinsert );

// Layer 2

Tvinsert. hParent = hDad;

Tvinsert. item. pszText = "computer system ";

Tvinsert. item. iImage = 1;

HTREEITEM hDad21 = pTree-> InsertItem (& tvinsert );

Tvinsert. item. pszText = "management system ";

HTREEITEM hDad22 = pTree-> InsertItem (& tvinsert );

// Layer 3

// Two sub-projects of the first project at Layer 2

Tvinsert. hParent = hDad21;

Tvinsert. item. pszText = "network engineering ";

Tvinsert. item. iImage = 2;

HTREEITEM hDad211 = pTree-> InsertItem (& tvinsert );

Tvinsert. item. pszText = "Software Engineering ";

HTREEITEM hDad212 = pTree-> InsertItem (& tvinsert );

// Two subprojects of the second project at Layer 2

Tvinsert. hParent = hDad22;

Tvinsert. item. pszText = "e-commerce ";

Tvinsert. item. iImage = 2;

HTREEITEM hDad221 = pTree-> InsertItem (& tvinsert );

/*

CTreeCtrl * pCtrl = (CTreeCtrl *) GetDlgItem (IDC_TREE1 );

ASSERT (pCtrl! = NULL );

 

// Insert a root item using the structure. We must

// Initialize a TVINSERTSTRUCT structure and pass its

// Address to the call.

 

TVINSERTSTRUCT tvInsert;

TvInsert. hParent = NULL;

TvInsert. hInsertAfter = NULL;

TvInsert. item. mask = TVIF_TEXT;

TvInsert. item. pszText = _ T ("United States ");

 

HTREEITEM hCountry = pCtrl-> InsertItem (& tvInsert );

 

// Insert subitems of that root. Pennsylvania is

// A state in the United States, so its item will be a child

// Of the United States item. We won't set any image or states,

// So we supply only the TVIF_TEXT mask flag. This

// Override provides nearly complete control over

// Insertion operation without the tedium of initializing

// A structure. If you're going to add lots of items

// To a tree, you might prefer the structure override

// As it affords you a performance win by allowing you

// To initialize some fields of the structure only once,

// Outside of your insertion loop.

 

HTREEITEM hPA = pCtrl-> InsertItem (TVIF_TEXT,

_ T ("Pennsylvania"), 0, 0, 0, 0, 0, hCountry, NULL );

 

// Insert the "Washington" item and assure that it is

// Inserted after the "Pennsylvania" item. This override is

// More appropriate for conveniently inserting items

// Images.

 

HTREEITEM hWA = pCtrl-> InsertItem (_ T ("Washington "),

0, 0, hCountry, hPA );

 

// We'll add some cities under each of the states.

// The override used here is most appropriate

// For inserting text-only items.

 

PCtrl-> InsertItem (_ T ("pitt0000gh"), hPA, TVI_SORT );

PCtrl-> InsertItem (_ T ("Harrisburg"), hPA, TVI_SORT );

PCtrl-> InsertItem (_ T ("Altoona"), hPA, TVI_SORT );

 

PCtrl-> InsertItem (_ T ("Seattle"), hWA, TVI_SORT );

PCtrl-> InsertItem (_ T ("Kalaloch"), hWA, TVI_SORT );

PCtrl-> InsertItem (_ T ("Yakima"), hWA, TVI_SORT );

 

*/