private void Handler_RemovePage(object sender, EventArgs eevent)
{
MultiPaneControl aCtl = DesignedControl;
if (aCtl == null)
{
return;
}
else if (aCtl.Controls.Count < 1)
{
return;
}
var aHost = (IDesignerHost)GetService(typeof(IDesignerHost));
if (aHost == null)
{
return;
}
myInTransaction = true;
DesignerTransactionUtility.DoInTransaction
(
aHost,
"MultiPaneControlRemovePage",
Transaction_RemovePage,
null
);
myInTransaction = false;
}
private object Transaction_RemovePage(IDesignerHost theHost, object theParam)
{
if (mySelectedPage == null)
{
return(null);
}
MultiPaneControl aCtl = DesignedControl;
MemberDescriptor aMember_Controls = TypeDescriptor.GetProperties(aCtl)["Controls"];
RaiseComponentChanging(aMember_Controls);
try
{
theHost.DestroyComponent(mySelectedPage);
// NOTE: we don't process anything here because processing will
// be performed in Handler_ComponentRemoving
}
catch
{
}
RaiseComponentChanged(aMember_Controls, null, null);
return(null);
}
private object Transaction_UpdateSelectedPage(IDesignerHost theHost, object theParam)
{
MultiPaneControl aCtl = DesignedControl;
MultiPanePage aPgTemp = mySelectedPage;
int aCurIndex = aCtl.Controls.IndexOf(mySelectedPage);
if (mySelectedPage == aCtl.SelectedPage) //we also need to update the SelectedPage property
{
MemberDescriptor aMember_SelectedPage = TypeDescriptor.GetProperties(aCtl)["SelectedPage"];
RaiseComponentChanging(aMember_SelectedPage);
if (aCtl.Controls.Count > 1)
{
// begin update current page
if (aCurIndex == aCtl.Controls.Count - 1) // NOTE: after SelectedPage has
{
aCtl.SelectedPage = (MultiPanePage)aCtl.Controls[aCurIndex - 1];
}
// been updated, mySelectedPage
else // has also changed
{
aCtl.SelectedPage = (MultiPanePage)aCtl.Controls[aCurIndex + 1];
}
// end update current page
}
else
{
aCtl.SelectedPage = null;
}
RaiseComponentChanged(aMember_SelectedPage, null, null);
}
else
{
if (aCtl.Controls.Count > 1)
{
if (aCurIndex == aCtl.Controls.Count - 1)
{
DesignerSelectedPage = (MultiPanePage)aCtl.Controls[aCurIndex - 1];
}
else
{
DesignerSelectedPage = (MultiPanePage)aCtl.Controls[aCurIndex + 1];
}
}
else
{
DesignerSelectedPage = null;
}
}
return(null);
}
private object Transaction_SetSelectedPageAsConcrete(IDesignerHost theHost, object theParam)
{
MultiPaneControl aCtl = DesignedControl;
MemberDescriptor aMember_SelectedPage = TypeDescriptor.GetProperties(aCtl)["SelectedPage"];
RaiseComponentChanging(aMember_SelectedPage);
aCtl.SelectedPage = (MultiPanePage)theParam;
RaiseComponentChanged(aMember_SelectedPage, null, null);
return(null);
}
private object Transaction_AddPage(IDesignerHost theHost, object theParam)
{
MultiPaneControl aCtl = DesignedControl;
var aNewPage = (MultiPanePage)theHost.CreateComponent(typeof(MultiPanePage));
MemberDescriptor aMem_Controls = TypeDescriptor.GetProperties(aCtl)["Controls"];
RaiseComponentChanging(aMem_Controls);
aCtl.Controls.Add(aNewPage);
DesignerSelectedPage = aNewPage;
RaiseComponentChanged(aMem_Controls, null, null);
return(null);
}
protected override void OnDragOver(DragEventArgs theDragEvents)
{
MultiPaneControl aCtl = DesignedControl;
Point pt = aCtl.PointToClient(new Point(theDragEvents.X, theDragEvents.Y));
if (!aCtl.DisplayRectangle.Contains(pt))
{
theDragEvents.Effect = DragDropEffects.None;
}
else
{
MultiPanePageDesigner aDsgn_Sel = GetSelectedPageDesigner();
if (aDsgn_Sel != null)
{
aDsgn_Sel.InternalOnDragOver(theDragEvents);
}
}
}
private void Handler_SelectionChanged(object sender, EventArgs e)
{
var aSrv = (ISelectionService)GetService(typeof(ISelectionService));
if (aSrv == null)
{
return;
}
ICollection aSel = aSrv.GetSelectedComponents();
MultiPaneControl aCtl = DesignedControl;
foreach (object aIt in aSel)
{
MultiPanePage aPage = GetPageOfControl(aIt);
if ((aPage != null) && (aPage.Parent == aCtl))
{
DesignerSelectedPage = aPage;
break;
}
}
}
private void Handler_ComponentRemoving(object theSender, ComponentEventArgs theArgs)
{
if (!(theArgs.Component is MultiPanePage))
{
return;
}
MultiPaneControl aCtl = DesignedControl;
var aPg = (MultiPanePage)theArgs.Component;
if (!aCtl.Controls.Contains(aPg))
{
return;
}
var aHost = (IDesignerHost)GetService(typeof(IDesignerHost));
if (!myInTransaction)
{
myInTransaction = true;
DesignerTransactionUtility.DoInTransaction
(
aHost,
"MultiPaneControlRemoveComponent",
Transaction_UpdateSelectedPage,
null
);
myInTransaction = false;
}
else
{
Transaction_UpdateSelectedPage(aHost, null);
}
CheckVerbStatus();
}
