SftTree/NET 2.0 - Tree Control for Windows Forms

FocusItem Property, SftTree Class

Defines the item that is the focus object.

Class: SftTree
Namespace: Softelvdm.SftTreeNET
Assembly: Softelvdm.SftTreeNET

Syntax

public ItemClass FocusItem { get; set; }

Public Property FocusItem As ItemClass

Value

The focus object or null/Nothing if there is no focus object.

The default value is null/Nothing.

Comments

Defines the item that is the focus object.

The current item is the item that has the focus rectangle.

The focus rectangle is controlled using the SftTree.ShowFocusRectangle property. The size of the focus rectangle is consistent with the current selection style (SftTree.SelectionStyle).

The focus item is not necessarily also selected (ItemClass.Selected).

When the user changes the current item or cell, the FocusObjectChange event occurs. The SelectionChange event occurs when the selection changes.

The FocusItem and SftTree.FocusCell properties define the focus object and are identical to the SftTree.FocusObject property but accept an item (ItemClass) or a cell (CellClass) instead of the more generic object.

Examples

C#

            if (e.Area == ItemClickAreaEnum.CellSel && e.Item != null) {
                ExpandCollapseItem(e.Item);
            }
        }
        private void sftTree1_KeyDown(object sender, KeyEventArgs e) {
            if (e.KeyCode == Keys.Right) {
                // Right arrow normally expands a parent item. Our items don't (yet) have
                // child items, so we'll have to handle the right arrow keys.
                ItemClass item = sftTree1.FocusItem;
                if (item != null) {
                    if (item.ExpandCollapseButton == ExpandCollapseButtonStyleEnum.Show) {
                        ExpandCollapseItem(item);
                        e.Handled = true;
                    }
                }
            }

View Entire Sample Code

VB.NET

        ExpandCollapseItem(e.Item)
    End If
End Sub

Private Sub sftTree1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles sftTree1.KeyDown
    If e.KeyCode = Keys.Right Then
        ' Right arrow normally expands a parent item. Our items don't (yet) have
        ' child items, so we'll have to handle the right arrow keys.
        Dim item As ItemClass = sftTree1.FocusItem
        If Not item Is Nothing Then
            If item.ExpandCollapseButton = ExpandCollapseButtonStyleEnum.Show Then
                ExpandCollapseItem(item)
                e.Handled = True
            End If
        End If
    End If

View Entire Sample Code

See Also SftTree Class | Classes | SftTree/NET 2.0