CTreeCtrl::GetItemPartRect
Retrieves the bounding rectangle for a specified part of a specified item in the current tree-view control.
BOOL GetItemPartRect(
HTREEITEM hItem,
int nPart,
LPRECT lpRect
)const;
Parameters
Parameter |
Description |
|---|---|
[in] hItem |
Handle to a tree-view control item. |
[in] nPart |
Identifier for the part. Must be set to TVGIPR_BUTTON. |
[out] lpRect |
Pointer to a RECT structure. If this method is successful, the structure receives the rectangle coordinates of the part specified by hItem and nPart. |
Return Value
true if this method is successful; otherwise, false.
Remarks
Each tree control item is bounded by a graphics rectangle. Whenever a point in that rectangle is clicked, the item is said to be hit. This method returns the largest rectangle such that when a point in the rectangle is clicked, the item identified by the hItem parameter is hit.
This method sends the TVM_GETITEMPARTRECT message, which is described in the Windows SDK. For more information, see the TreeView_GetItemPartRect macro.
Requirements
Header: afxcmn.h
This method is supported in Windows Vista and later.
Additional requirements for this method are described in Build Requirements for Windows Vista Common Controls.
Example
The following code example defines a variable, m_treeCtrl, that is used to access the current tree-view control. The code example also defines an unsigned integer and several HTREEITEM variables. These variables are used in the next example.
public:
// Variable to access tree control.
CTreeCtrl m_treeCtrl;
// Variable to access splitbutton control.
CSplitButton m_splitbutton;
// Accessibility identifier
UINT accIdUS;
// HTREEITEMs
HTREEITEM hCountry;
HTREEITEM hPA;
HTREEITEM hWA;
The following code example uses an accessibility identifier and the CTreeCtrl::MapAccIdToItem method to retrieve a handle to the root tree-view item. Then the example uses the handle and the CTreeCtrl::GetItemPartRect method to draw a 3D rectangle around that item. In an earlier section of the code example, which is not shown, we created a tree-view that consists of a root country node for the United States, subnodes for the states of Pennsylvania and Washington, and tree items for cities in those states. We used the CTreeCtrl::MapItemToAccID method to associate the root tree-view item with an accessibility identifier.
CRect rect;
HTREEITEM hUS = m_treeCtrl.MapAccIdToItem( accIdUS );
m_treeCtrl.GetItemPartRect( hUS, TVGIPR_BUTTON, &rect );
m_treeCtrl.GetDC()->Draw3dRect( &rect, RGB(255, 0, 0), RGB(0, 0, 255));