/// Disposes the entire selection manager.
internal void Dispose()
{
// We've got to be careful here. We're one of the last things to go away when
// a form is being torn down, and we've got to be wary if things have pulled out
// already.
host.RemoveService(typeof(ISelectionService));
host.TransactionOpened -= new EventHandler(this.DesignerHost_TransactionOpened);
host.TransactionClosed -= new DesignerTransactionCloseEventHandler(this.DesignerHost_TransactionClosed);
if (host.InTransaction)
{
DesignerHost_TransactionClosed(host, new DesignerTransactionCloseEventArgs(true));
}
host.LoadComplete -= new EventHandler(this.DesignerHost_LoadComplete);
IComponentChangeService cs = (IComponentChangeService)host.GetService(typeof(IComponentChangeService));
if (cs != null)
{
cs.ComponentAdded -= new ComponentEventHandler(this.DesignerHost_ComponentAdd);
cs.ComponentRemoved -= new ComponentEventHandler(this.DesignerHost_ComponentRemove);
cs.ComponentChanged -= new ComponentChangedEventHandler(this.DesignerHost_ComponentChanged);
}
EtoSelectionItem[] sels = new EtoSelectionItem[selectionsByComponent.Values.Count];
selectionsByComponent.Values.CopyTo(sels, 0);
for (int i = 0; i < sels.Length; i++)
{
sels[i].Dispose();
}
selectionsByComponent.Clear();
primarySelection = null;
}
/// Sets the given selection object to be the primary selection.
internal void SetPrimarySelection(EtoSelectionItem sel)
{
if (sel != primarySelection)
{
if (null != primarySelection)
{
primarySelection.Primary = false;
}
primarySelection = sel;
}
if (null != primarySelection)
{
primarySelection.Primary = true;
}
}
/// Removes the given selection from our selection list
private void RemoveSelection(EtoSelectionItem s)
{
selectionsByComponent.Remove(s.Component);
s.Dispose();
}
/// Called by the formcore when someone has removed a component. This will
/// remove any selection on the component without disturbing the rest of
/// the selection.
private void DesignerHost_ComponentRemove(object sender, ComponentEventArgs ce)
{
EtoSelectionItem sel = (EtoSelectionItem)selectionsByComponent[ce.Component];
if (sel != null)
{
RemoveSelection(sel);
// If we removed the last selection and we have a designer host, then select the base
// component of the host. Otherwise, it is OK to have an empty selection.
if (selectionsByComponent.Count == 0 && host != null)
{
// Now we have to run through all the components and pick
// the control with the highest z-order.
IComponent[] comps = new IComponent[host.Container.Components.Count];
host.Container.Components.CopyTo(comps, 0);
if (comps == null)
{
return;
}
int maxZOrder = -1;
int defaultIndex = -1;
object maxIndexComp = null;
object baseComp = host.RootComponent;
if (baseComp == null)
{
return;
}
for (int i = comps.Length - 1; i >= 0; i--)
{
if (comps[i] == baseComp)
{
continue;
}
else if (defaultIndex == -1)
{
defaultIndex = i;
}
if (comps[i] is Control)
{
int zorder = ((Control)comps[i]).TabIndex;
if (zorder > maxZOrder)
{
maxZOrder = zorder;
maxIndexComp = (object)comps[i];
}
}
}
if (maxIndexComp == null)
{
if (defaultIndex != -1)
{
maxIndexComp = comps[defaultIndex];
}
else
{
maxIndexComp = baseComp;
}
}
((ISelectionService)this).SetSelectedComponents(new object[] { maxIndexComp }, SelectionTypes.Replace);
}
else
{
OnSelectionChanged();
}
}
else
{
// Component isn't selected, but our list of selectable components is
// different.
OnSelectionContentsChanged();
}
}
/// Adds the given selection to our selection list.
private void AddSelection(EtoSelectionItem sel)
{
selectionsByComponent[sel.Component] = sel;
}
/// Select the given components with the given SelectionType.
void ISelectionService.SetSelectedComponents(ICollection components, SelectionTypes selectionType)
{
bool fToggle = false;
bool fControl = false;
bool fClick = false;
bool fChanged = false; // did we actually change something?
// Catch a null input list
if (components == null)
{
components = new Component[0];
}
if ((selectionType & SelectionTypes.Normal) == SelectionTypes.Normal ||
(selectionType & SelectionTypes.Click) == SelectionTypes.Click)
{
fControl = ((Control.ModifierKeys & Keys.Control) == Keys.Control);
// Only toggle when we are affecting a single control, and
// when we are handling the "mouse" state events (i.e. up/down
// used to show/hide the selection).
//
fToggle = ((Control.ModifierKeys & Keys.Control) != 0 || (Control.ModifierKeys & Keys.Shift) != 0) &&
components.Count == 1 &&
(selectionType & SelectionTypes.MouseUp) != SelectionTypes.MouseUp;
}
if ((selectionType & SelectionTypes.Click) == SelectionTypes.Click)
{
fClick = true;
}
// If we are replacing the selection, only remove the ones that are not in our new list.
// We also handle the special case here of having a singular component selected that's
// already selected. In this case we just move it to the primary selection.
//
if (!fToggle && !fControl)
{
object firstSelection = null;
foreach (object o in components)
{
firstSelection = o;
break;
}
if (fClick && 1 == components.Count && ((ISelectionService)this).GetComponentSelected(firstSelection))
{
EtoSelectionItem oldPrimary = primarySelection;
SetPrimarySelection((EtoSelectionItem)selectionsByComponent[firstSelection]);
if (oldPrimary != primarySelection)
{
fChanged = true;
}
}
else
{
EtoSelectionItem[] selections = new EtoSelectionItem[selectionsByComponent.Values.Count];
selectionsByComponent.Values.CopyTo(selections, 0);
// Even with several hundred components this should be fairly fast
foreach (EtoSelectionItem item in selections)
{
bool remove = true;
foreach (object comp in components)
{
if (comp == item.Component)
{
remove = false;
break;
}
}
if (remove)
{
RemoveSelection(item);
fChanged = true;
}
}
}
}
EtoSelectionItem primarySel = null;
int selectedCount = selectionsByComponent.Count;
// Now do the selection.
foreach (Component comp in components)
{
if (comp != null)
{
EtoSelectionItem s = (EtoSelectionItem)selectionsByComponent[comp];
if (null == s)
{
s = new EtoSelectionItem(this, comp);
AddSelection(s);
if (fControl || fToggle)
{
primarySel = s;
}
fChanged = true;
}
else
{
if (fToggle)
{
// Remove the selection from our list.
RemoveSelection(s);
fChanged = true;
}
}
}
}
if (primarySel != null)
{
SetPrimarySelection(primarySel);
}
// Now notify that our selection has changed
if (fChanged)
{
OnSelectionChanged();
}
}