public override void Start()
{
if (!this.mySelectionSet)
{
base.CurrentObject = base.View.PickObject(true, false, base.FirstInput.DocPoint, true);
if (base.CurrentObject == null)
{
return;
}
this.MoveOffset = DiagramTool.SubtractPoints(base.FirstInput.DocPoint, base.CurrentObject.Position);
}
base.StartTransaction();
if (!this.mySelectionSet && !base.Selection.Contains(base.CurrentObject))
{
if (base.FirstInput.Shift || base.FirstInput.Control)
{
base.Selection.Add(base.CurrentObject);
}
else
{
base.Selection.Select(base.CurrentObject);
}
}
if (this.HidesSelectionHandles)
{
this.mySelectionHidden = true;
base.Selection.RemoveAllSelectionHandles();
}
if (!this.mySelectionSet && base.View.AllowDragOut)
{
this.myModalDropped = false;
try
{
SizeF ef1 = DiagramTool.SubtractPoints(base.LastInput.DocPoint, base.Selection.Primary.Position);
base.Selection.HotSpot = ef1;
this.DoDragDrop(base.Selection, DragDropEffects.Move | (DragDropEffects.Copy | DragDropEffects.Scroll));
}
catch (SecurityException exception1)
{
Shapes.DiagramShape.Trace("GoToolDragging Start: " + exception1.ToString());
return;
}
finally
{
if (!this.myModalDropped)
{
this.DoCancelMouse();
}
else
{
base.StopTool();
}
base.Selection.HotSpot = new SizeF();
}
}
}
public override void DoCancelMouse()
{
if ((base.CurrentObject != null) && (this.DragSelection == null))
{
SizeF ef1 = DiagramTool.SubtractPoints(base.FirstInput.DocPoint, this.MoveOffset);
base.View.MoveSelection((this.EffectiveSelection != null) ? this.EffectiveSelection : base.Selection, DiagramTool.SubtractPoints(ef1, base.CurrentObject.Position), false);
}
base.TransactionResult = null;
base.StopTool();
}
public virtual void MakeDragSelection()
{
if (this.DragSelection == null)
{
this.DragSelectionOriginalObject = base.CurrentObject;
this.DragSelection = this.CreateDragSelection();
if ((this.DragSelection == null) || this.DragSelection.IsEmpty)
{
this.DragSelectionOriginalObject = null;
this.DragSelection = null;
}
else
{
base.View.MoveSelection((this.EffectiveSelection != null) ? this.EffectiveSelection : base.Selection, DiagramTool.SubtractPoints(DiagramTool.SubtractPoints(base.FirstInput.DocPoint, this.MoveOffset), this.DragSelectionOriginalObject.Position), false);
if (base.CurrentObject.View != base.View)
{
base.CurrentObject = this.DragSelection.Primary;
}
}
}
}
public virtual void DoDragging(InputState evttype)
{
if (base.CurrentObject != null)
{
SizeF ef1 = DiagramTool.SubtractPoints(base.LastInput.DocPoint, base.CurrentObject.Position);
SizeF ef2 = new SizeF(ef1.Width - this.MoveOffset.Width, ef1.Height - this.MoveOffset.Height);
bool flag1 = this.MustBeCopying();
DiagramViewSnapStyle style1 = base.View.GridSnapDrag;
if (this.EffectiveSelection == null)
{
this.myEffectiveSelection = this.ComputeEffectiveSelection(base.Selection, !flag1);
}
if (evttype != InputState.Finish)
{
bool flag2 = style1 == DiagramViewSnapStyle.Jump;
if (flag1 || !base.View.DragsRealtime)
{
this.MakeDragSelection();
base.View.MoveSelection(this.DragSelection, ef2, flag2);
}
else
{
this.ClearDragSelection();
base.View.MoveSelection(this.EffectiveSelection, ef2, flag2);
}
}
else
{
SizeF ef3 = new SizeF();
if (this.DragSelection != null)
{
ef3 = DiagramTool.SubtractPoints(base.CurrentObject.Position, this.DragSelectionOriginalObject.Position);
this.ClearDragSelection();
}
else
{
ef3 = ef2;
}
bool flag3 = (style1 == DiagramViewSnapStyle.Jump) || (style1 == DiagramViewSnapStyle.After);
if (flag1)
{
if (this.CopiesEffectiveSelection)
{
base.View.CopySelection(this.ComputeEffectiveSelection(base.Selection, false), ef3, flag3);
}
else
{
base.View.CopySelection(base.Selection, ef3, flag3);
}
}
else
{
if (this.EffectiveSelection == null)
{
this.myEffectiveSelection = this.ComputeEffectiveSelection(base.Selection, true);
}
base.View.MoveSelection(this.EffectiveSelection, ef3, flag3);
}
}
}
}