Tree control templates

• Download source files - 3 Kb
• Download demo project - 33 Kb

Introduction

These templates allow CTreeCtrl derived classes programmers to add three basic functionalities to their classes:

• Iteration of all the items in the control
• Persistence of the status of the control (when you reload it, it tries to return to its previous state)
• Expand / Collapse all the items in the tree

Sample Code 1: Deep Iteration

/////////////////////////
// Deep iteration sample

mc_tcTree.Initialize(true);

HTREEITEM hItem= mc_tcTree.GetNext();

while (hItem != NULL)
{
    TRACE(mc_tcTree.GetItemText(hItem) + "\n");

    hItem= mc_tcTree.GetNext();
}

Sample Code 2: Width Iteration

/////////////////////////
// Width iteration sample

mc_tcTree.Initialize(false);

HTREEITEM hItem= mc_tcTree.GetNext();

while (hItem != NULL)
{
    TRACE(mc_tcTree.GetItemText(hItem) + "\n");

    hItem= mc_tcTree.GetNext();
}

Sample Code 3: Expanding All Items

/////////////////////////
// Items expand sample

mc_tcTree.SetRedraw(FALSE);
	
mc_tcTree.ExpandItem();
	
 mc_tcTree.SetRedraw(TRUE);

Sample Code 4: Collapsing All Items

/////////////////////////
// Items collapse sample

mc_tcTree.SetRedraw(FALSE);
	
mc_tcTree.ExpandItem(TVI_ROOT, TVE_COLLAPSE);
	
mc_tcTree.SetRedraw(TRUE);

Sample Code 5: Status Preservation

/////////////////////////
// Status preservation sample

mc_tcTree.SaveStatus();

PopulateTree();

mc_tcTree.RestoreStatus();

That's all folks!

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)