/// <summary>
/// Occurs when the <see cref="E:System.Windows.Forms.TreeView.NodeMouseClick"></see> event is fired
/// -- that is, when a node in the tree view is clicked.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.TreeNodeMouseClickEventArgs"></see> that contains the event data.</param>
protected override void OnNodeMouseClick(TreeNodeMouseClickEventArgs e)
{
// Are we dealing with a dropdown node?
if (e.Node is DropDownTreeNode)
{
this.m_CurrentNode = (DropDownTreeNode)e.Node;
// Need to add the node's ComboBox to the TreeView's list of controls for it to work
this.Controls.Add(this.m_CurrentNode.ComboBox);
// Set the bounds of the ComboBox, with a little adjustment to make it look right
this.m_CurrentNode.ComboBox.SetBounds(
this.m_CurrentNode.Bounds.X - 1,
this.m_CurrentNode.Bounds.Y - 2,
this.m_CurrentNode.Bounds.Width + 25,
this.m_CurrentNode.Bounds.Height);
// Listen to the SelectedValueChanged event of the node's ComboBox
this.m_CurrentNode.ComboBox.SelectedValueChanged += new EventHandler(ComboBox_SelectedValueChanged);
this.m_CurrentNode.ComboBox.DropDownClosed += new EventHandler(ComboBox_DropDownClosed);
// Now show the ComboBox
this.m_CurrentNode.ComboBox.Show();
this.m_CurrentNode.ComboBox.DroppedDown = true;
}
base.OnNodeMouseClick(e);
}
/// <summary>
/// Method to hide the currently-selected node's ComboBox
/// </summary>
private void HideComboBox()
{
if (this.m_CurrentNode != null)
{
// Unregister the event listener
this.m_CurrentNode.ComboBox.SelectedValueChanged -= ComboBox_SelectedValueChanged;
this.m_CurrentNode.ComboBox.DropDownClosed -= ComboBox_DropDownClosed;
// Copy the selected text from the ComboBox to the TreeNode
this.m_CurrentNode.Text = this.m_CurrentNode.ComboBox.Text;
// Hide the ComboBox
this.m_CurrentNode.ComboBox.Hide();
this.m_CurrentNode.ComboBox.DroppedDown = false;
// Remove the control from the TreeView's list of currently-displayed controls
this.Controls.Remove(this.m_CurrentNode.ComboBox);
// And return to the default state (no ComboBox displayed)
this.m_CurrentNode = null;
}
}
/// <summary>
/// Occurs when the <see cref="E:System.Windows.Forms.TreeView.NodeMouseClick"></see> event is fired
/// -- that is, when a node in the tree view is clicked.
/// </summary>
/// <param name="e">A <see cref="T:System.Windows.Forms.TreeNodeMouseClickEventArgs"></see> that contains the event data.</param>
protected override void OnNodeMouseClick(TreeNodeMouseClickEventArgs e)
{
// Are we dealing with a dropdown node?
if (e.Node is DropDownTreeNode)
{
this.m_CurrentNode = (DropDownTreeNode)e.Node;
// Need to add the node's ComboBox to the TreeView's list of controls for it to work
this.Controls.Add(this.m_CurrentNode.ComboBox);
// Set the bounds of the ComboBox, with a little adjustment to make it look right
this.m_CurrentNode.ComboBox.SetBounds(
this.m_CurrentNode.Bounds.X - 1,
this.m_CurrentNode.Bounds.Y - 2,
this.m_CurrentNode.Bounds.Width + 25,
this.m_CurrentNode.Bounds.Height);
// Listen to the SelectedValueChanged event of the node's ComboBox
this.m_CurrentNode.ComboBox.SelectedValueChanged += new EventHandler(ComboBox_SelectedValueChanged);
this.m_CurrentNode.ComboBox.DropDownClosed += new EventHandler(ComboBox_DropDownClosed);
// Now show the ComboBox
this.m_CurrentNode.ComboBox.Show();
this.m_CurrentNode.ComboBox.DroppedDown = true;
}
base.OnNodeMouseClick(e);
}
/// <summary>
/// Method to hide the currently-selected node's ComboBox
/// </summary>
private void HideComboBox()
{
if (this.m_CurrentNode != null)
{
// Unregister the event listener
this.m_CurrentNode.ComboBox.SelectedValueChanged -= ComboBox_SelectedValueChanged;
this.m_CurrentNode.ComboBox.DropDownClosed -= ComboBox_DropDownClosed;
// Copy the selected text from the ComboBox to the TreeNode
this.m_CurrentNode.Text = this.m_CurrentNode.ComboBox.Text;
// Hide the ComboBox
this.m_CurrentNode.ComboBox.Hide();
this.m_CurrentNode.ComboBox.DroppedDown = false;
// Remove the control from the TreeView's list of currently-displayed controls
this.Controls.Remove(this.m_CurrentNode.ComboBox);
// And return to the default state (no ComboBox displayed)
this.m_CurrentNode = null;
}
}
private void InitializeExampleComponents()
{
DropDownTreeNode tn1 = new DropDownTreeNode("Vacation 2006 (Denver)");
tn1.ComboBox.Items.Add("Vacation 2006 (Denver)");
tn1.ComboBox.Items.Add("Vacation 2005 (Miami)");
tn1.ComboBox.Items.Add("Vacation 2004 (Washington DC)");
tn1.ComboBox.Items.Add("Vacation 2003 (Houston)");
tn1.ComboBox.SelectedIndex = 0;
tn1.BackColor = Color.AliceBlue;
tn1.ComboBox.BackColor = Color.AliceBlue;
DropDownTreeNode tn2 = new DropDownTreeNode("Vacation 2005 (Miami)");
tn2.ComboBox.Items.Add("Vacation 2006 (Denver)");
tn2.ComboBox.Items.Add("Vacation 2005 (Miami)");
tn2.ComboBox.Items.Add("Vacation 2004 (Washington DC)");
tn2.ComboBox.Items.Add("Vacation 2003 (Houston)");
tn2.ComboBox.SelectedIndex = 1;
tn2.BackColor = Color.Plum;
tn2.ComboBox.BackColor = Color.Plum;
DropDownTreeNode tn3 = new DropDownTreeNode("Vacation 2006 (Washington DC)");
tn3.ComboBox.Items.Add("Vacation 2006 (Denver)");
tn3.ComboBox.Items.Add("Vacation 2005 (Miami)");
tn3.ComboBox.Items.Add("Vacation 2004 (Washington DC)");
tn3.ComboBox.Items.Add("Vacation 2003 (Houston)");
tn3.ComboBox.SelectedIndex = 2;
tn3.BackColor = Color.LightSalmon;
tn3.ComboBox.BackColor = Color.LightSalmon;
TreeNode photoNode = new TreeNode("Photo Sets To Print");
photoNode.Nodes.Add(tn1);
photoNode.Nodes.Add(tn2);
photoNode.Nodes.Add(tn3);
this.dropDownTreeView1.Nodes.Add(photoNode);
DropDownTreeNode pickleNode = new DropDownTreeNode("No pickles");
pickleNode.ComboBox.Items.Add("No pickles");
pickleNode.ComboBox.Items.Add("Add pickles");
pickleNode.ComboBox.SelectedIndex = 0;
DropDownTreeNode lettuceNode = new DropDownTreeNode("No lettuce");
lettuceNode.ComboBox.Items.Add("No lettuce");
lettuceNode.ComboBox.Items.Add("Add lettuce");
lettuceNode.ComboBox.SelectedIndex = 0;
DropDownTreeNode onionNode = new DropDownTreeNode("No onions");
onionNode.ComboBox.Items.Add("No onions");
onionNode.ComboBox.Items.Add("Add onions");
onionNode.ComboBox.SelectedIndex = 0;
TreeNode condimentsNode = new TreeNode("Condiments");
condimentsNode.Nodes.Add(pickleNode);
condimentsNode.Nodes.Add(lettuceNode);
condimentsNode.Nodes.Add(onionNode);
DropDownTreeNode weightNode = new DropDownTreeNode("1/4 lb.");
weightNode.ComboBox.Items.Add("1/4 lb.");
weightNode.ComboBox.Items.Add("1/2 lb.");
weightNode.ComboBox.Items.Add("3/4 lb.");
weightNode.ComboBox.SelectedIndex = 0;
DropDownTreeNode pattyNode = new DropDownTreeNode("All beef patty");
pattyNode.ComboBox.Items.Add("All beef patty");
pattyNode.ComboBox.Items.Add("All chicken patty");
pattyNode.ComboBox.SelectedIndex = 0;
TreeNode meatNode = new TreeNode("Meat Selection");
meatNode.Nodes.Add(weightNode);
meatNode.Nodes.Add(pattyNode);
TreeNode burgerNode = new TreeNode("Hamburger Selection");
burgerNode.Nodes.Add(condimentsNode);
burgerNode.Nodes.Add(meatNode);
this.dropDownTreeView1.Nodes.Add(burgerNode);
this.dropDownTreeView1.ExpandAll();
}
