/// <summary>
/// Forward container events
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void item_ContainerEvent(object sender, ContainerEventArgs e)
{
if (ContainerEvent != null)
{
ContainerEvent(sender, e);
}
}
/// <summary>
/// Gets a transformation used to convert from local space to control space.
/// </summary>
public Matrix GetLocal2ControlTransform()
{
var args = new ContainerEventArgs(ContainerMessage.Local2ControlMatrix, this, new Matrix());
RaiseContainerEvent(args);
return(args.Transform);
}
/// <summary>
/// Fire the ContainerEvent with given argument.
/// </summary>
/// <param name="e"></param>
protected void RaiseContainerEvent(ContainerEventArgs e)
{
if (ContainerEvent != null)
{
ContainerEvent(this, e);
}
}
/// <summary>
/// Notify the canvas to block update request till EndUpdate.
/// </summary>
protected IDisposable BeginUpdate()
{
var update = new Update(this);
updateDepth++;
if ((updateDepth == 1) && (ContainerEvent != null))
{
var args = new ContainerEventArgs(ContainerMessage.BeginUpdate, this)
{
Update = update
};
ContainerEvent(this, args);
}
return(update);
}
/// <summary>
/// Handle events from the root container
/// </summary>
private void OnRootContainerEvent(object sender, ContainerEventArgs e)
{
if (InvokeRequired)
{
Invoke(new EventHandler <ContainerEventArgs>(OnRootContainerEvent), sender, e);
}
else
{
switch (e.Message)
{
case ContainerMessage.SizeChanged:
UpdateScrollbars();
Invalidate();
break;
case ContainerMessage.Redraw:
Invalidate();
break;
case ContainerMessage.ZoomToRectangle:
rootContainer.ZoomToRectangle(e.Rectangle);
break;
case ContainerMessage.BeginUpdate:
e.Update.Add(BeginUpdate());
break;
case ContainerMessage.EnsureVisible:
if (!rootContainer.IsVisible(e.Point))
{
rootContainer.ZoomTo(ZoomFactor, e.Point);
}
break;
case ContainerMessage.Local2ControlMatrix:
rootContainer.Local2Global(e.Transform);
break;
case ContainerMessage.CustomMessage:
if (CustomItemMessage != null)
{
CustomItemMessage(e.Sender, new ArgumentEventArgs(e.Argument));
}
break;
}
}
}
/// <summary>
/// Default ctor
/// </summary>
public VCItemContainer()
{
this.KeyboardHandler = new Handlers.ContainerKeyboardHandler(this, null);
this.MouseHandler = new Handlers.ContainerMouseHandler(this, null);
this.DragDropHandler = new Handlers.ContainerDragDropHandler(this, null);
// Connect to itms
items.Added += delegate(object sender, VCItemPlacementEventArgs e)
{
LayoutItems();
//RaiseSizeChanged();
};
items.Removed += delegate(object sender, VCItemPlacementEventArgs e)
{
if (selection != null)
{
selection.Remove(e.Placement);
}
LayoutItems();
//RaiseSizeChanged();
};
items.ContainerEvent += delegate(object sender, ContainerEventArgs e)
{
switch (e.Message)
{
case ContainerMessage.SizeChanged:
LayoutItems();
//RaiseSizeChanged();
break;
case ContainerMessage.ZoomToRectangle:
{
var placement = items.Find((VCItem)sender);
if (placement != null)
{
var rect = e.Rectangle;
rect.Location = placement.FromLocal(rect.Location);
ZoomToRectangle(rect);
}
}
break;
case ContainerMessage.EnsureVisible:
{
var placement = items.Find((VCItem)sender);
if (placement != null)
{
var pt = placement.FromLocal(e.Point);
EnsureVisible(pt);
}
}
break;
case ContainerMessage.Redraw:
if (!IsUpdating)
{
RaiseContainerEvent(e);
}
break;
case ContainerMessage.Local2ControlMatrix:
{
var placement = items.Find((VCItem)sender);
if (placement != null)
{
e.Transform.Multiply(placement.Transform, MatrixOrder.Append);
var args = new ContainerEventArgs(e.Message, this, e.Transform);
RaiseContainerEvent(args);
}
}
break;
default:
// Forward all other events
RaiseContainerEvent(e);
break;
}
};
}
