// Sets the value of the current object control
protected void SetObjectValue()
{
ArrayList nodes =
ObjectTreeNode.GetNodesOfType(_type);
ComboBox cb = (ComboBox)_valueControl;
// Get rid of the nodes that refer to duplicate or null
// objects; for duplicates, choose the node with the
// shortest path
ArrayList objects = new ArrayList();
for (int i = 0; i < nodes.Count;)
{
ObjectTreeNode node = (ObjectTreeNode)nodes[i];
Object obj = node.ObjectInfo.Obj;
if (obj == null)
{
// The remaining nodes move up, so we
// don't increment the index
nodes.Remove(node);
continue;
}
ObjNode objNode = new ObjNode(obj, node);
ObjNode objNodeFound =
(ObjNode)Utils.FindHack(objects, objNode);
if (objNodeFound == null)
{
objects.Add(objNode);
i++;
}
else
{
// See if this node is better than the one
// previously found, nodes move up in both
// cases so don't increment index
if (objNode._pathCount < objNodeFound._pathCount)
{
nodes.Remove(objNodeFound._node);
objects.Remove(objNodeFound);
objects.Add(objNode);
}
else
{
nodes.Remove(node);
}
}
}
// Now measure all of the remaining nodes to figure
// out how big to make the combo box
Graphics g = cb.CreateGraphics();
int maxWidth = 0;
foreach (TreeNode node in nodes)
{
TraceUtil.WriteLineVerbose(null,
"SetObjectValue looking node: "
+ ((BrowserTreeNode)node).GetName());
int width = (int)g.MeasureString(node.ToString(),
cb.Font).Width;
if (width > maxWidth)
{
maxWidth = width;
}
}
g.Dispose();
// The first value is "null" to allow the object to
// be set to null
// Second is Missing.Value to allow it to be optional
_values.Clear();
_values.Add(null);
_values.Add(Missing.Value);
_values.AddRange(nodes);
if (maxWidth > cb.Width)
{
cb.DropDownWidth = maxWidth;
}
cb.Items.Clear();
cb.Items.Add("null");
cb.Items.Add("Missing.Value");
cb.Items.AddRange(nodes.ToArray());
if (_valueControl2 != null)
{
((TextBox)_valueControl2).Text = "";
}
// Select the object if it exists
if (_value != null)
{
bool found = false;
foreach (ObjectTreeNode node in nodes)
{
if (_value == node.ObjectInfo.Obj)
{
cb.SelectedItem = node;
found = true;
// Enable the combo box
cb.Enabled = true;
if (_valueControl2 != null)
{
_valueControl2.Enabled = false;
}
break;
}
}
// Just set the text box to be the string value of whatever
// this is
if (!found)
{
if (_valueControl2 != null)
{
cb.Enabled = false;
_valueControl2.Enabled = true;
((TextBox)_valueControl2).Text = _value.ToString();
}
}
}
else
{
// Make the default for optional parameters missing
// so nothing has to be done to specify them
if (_optional)
{
cb.Enabled = true;
if (_valueControl2 != null)
{
_valueControl2.Enabled = false;
}
cb.SelectedIndex = OBJECT_MISSING;
}
else
{
if (_valueControl2 != null)
{
// Enable text
cb.Enabled = false;
_valueControl2.Enabled = true;
}
cb.SelectedIndex = OBJECT_NULL;
}
}
}