private bool CanPaste(bool asNew = false)
{
if (_clipboardNodes == null)
{
return(false);
}
ElementNode destinationNode = null;
TreeNode selectedTreeNode = treeview.SelectedNode;
if (selectedTreeNode != null)
{
destinationNode = selectedTreeNode.Tag as ElementNode;
}
IEnumerable <ElementNode> invalidNodesForTarget = Enumerable.Empty <ElementNode>();
if (destinationNode == null && !asNew)
{
invalidNodesForTarget = VixenSystem.Nodes.InvalidRootNodes;
}
else if (destinationNode != null)
{
invalidNodesForTarget = destinationNode.InvalidChildren();
}
IEnumerable <ElementNode> invalidSourceNodes = invalidNodesForTarget.Intersect(_clipboardNodes);
if (invalidSourceNodes.Any())
{
return(false);
}
return(true);
}
private void pasteNodesToolStripMenuItem_Click(object sender, EventArgs e)
{
if (_clipboardNodes == null)
{
return;
}
ElementNode destinationNode = null;
TreeNode selectedTreeNode = treeview.SelectedNode;
if (selectedTreeNode != null)
{
destinationNode = selectedTreeNode.Tag as ElementNode;
}
IEnumerable <ElementNode> invalidNodesForTarget;
if (destinationNode == null)
{
invalidNodesForTarget = VixenSystem.Nodes.InvalidRootNodes;
}
else
{
invalidNodesForTarget = destinationNode.InvalidChildren();
}
IEnumerable <ElementNode> invalidSourceNodes = invalidNodesForTarget.Intersect(_clipboardNodes);
if (invalidSourceNodes.Any())
{
SystemSounds.Asterisk.Play();
}
else
{
// Check to see if the new parent node would be 'losing' the Element (ie. becoming a
// group instead of a leaf node with a element/patches). Prompt the user first.
if (CheckAndPromptIfNodeWillLosePatches(destinationNode))
{
return;
}
foreach (ElementNode cn in _clipboardNodes)
{
VixenSystem.Nodes.AddChildToParent(cn, destinationNode);
}
if (selectedTreeNode != null)
{
selectedTreeNode.Expand();
}
PopulateNodeTree();
OnElementsChanged();
}
}