private void childForm_FormClosed(object sender, FormClosedEventArgs e)
{
if (sender is DisplayChildForm)
{
DisplayChildForm childForm = (DisplayChildForm)sender;
Diagram diagram = childForm.Display.Diagram;
Debug.Assert(diagram != null);
// Clean up
UnregisterChildFormEvents(childForm);
childForm.Display.Diagram = null;
childForm.Display.DiagramSetController = null;
displayChildForms.Remove(diagram.Name);
// Endable menu item
foreach (ToolStripMenuItem item in diagramsToolStripMenuItem.DropDownItems)
{
if (item.Tag == diagram)
{
item.Enabled = true;
break;
}
}
}
}
private void ShowDisplayChildForm(Diagram diagram) {
DisplayChildForm childForm = new DisplayChildForm();
RegisterChildFormEvents(childForm);
childForm.MdiParent = this;
childForm.Display.DiagramSetController = diagramSetController;
childForm.Display.Diagram = diagram;
childForm.Show();
displayChildForms.Add(diagram.Name, childForm);
}
private void ShowDisplayChildForm(Diagram diagram)
{
DisplayChildForm childForm = new DisplayChildForm();
RegisterChildFormEvents(childForm);
childForm.MdiParent = this;
childForm.Display.DiagramSetController = diagramSetController;
childForm.Display.Diagram = diagram;
childForm.Show();
displayChildForms.Add(diagram.Name, childForm);
}
private void UnregisterChildFormEvents(DisplayChildForm childForm) {
childForm.FormClosed -= childForm_FormClosed;
childForm.Disposed -= childForm_Disposed;
}
private void UnregisterChildFormEvents(DisplayChildForm childForm)
{
childForm.FormClosed -= childForm_FormClosed;
childForm.Disposed -= childForm_Disposed;
}