/// <summary>
/// Constructs a sheet by calling <see cref="M:Northwoods.Go.GoSheet.CreatePaper" />,
/// <see cref="M:Northwoods.Go.GoSheet.CreateBackgroundImage" />, and <see cref="M:Northwoods.Go.GoSheet.CreateGrid" />.
/// </summary>
public GoSheet()
{
base.Initializing = true;
myPaper = CreatePaper();
Add(myPaper);
myBackgroundImage = CreateBackgroundImage();
Add(myBackgroundImage);
myGrid = CreateGrid();
Add(myGrid);
myLeft = MakeBoundary();
Add(myLeft);
myRight = MakeBoundary();
Add(myRight);
myTop = MakeBoundary();
Add(myTop);
myBottom = MakeBoundary();
Add(myBottom);
base.Initializing = false;
LayoutChildren(null);
}
/// <summary>
/// Update the internal reference fields when a child object is removed.
/// </summary>
/// <param name="obj"></param>
public override bool Remove(GoObject obj)
{
bool result = base.Remove(obj);
if (obj == myPaper)
{
myPaper = null;
return(result);
}
if (obj == myBackgroundImage)
{
myBackgroundImage = null;
return(result);
}
if (obj == myGrid)
{
myGrid = null;
return(result);
}
if (obj == myLeft)
{
myLeft = null;
return(result);
}
if (obj == myRight)
{
myRight = null;
return(result);
}
if (obj == myTop)
{
myTop = null;
return(result);
}
if (obj == myBottom)
{
myBottom = null;
}
return(result);
}
/// <summary>
/// When resizing the <see cref="F:Northwoods.Go.GoBalloon.AnchorHandle" />, call
/// <see cref="M:Northwoods.Go.GoBalloon.PickNewAnchor(System.Drawing.PointF,Northwoods.Go.GoView,Northwoods.Go.GoInputState)" /> to consider other objects as anchors for this balloon.
/// </summary>
/// <param name="view"></param>
/// <param name="origRect"></param>
/// <param name="newPoint"></param>
/// <param name="whichHandle"></param>
/// <param name="evttype"></param>
/// <param name="min"></param>
/// <param name="max"></param>
/// <remarks>
/// <para>
/// <see cref="M:Northwoods.Go.GoBalloon.PickNewAnchor(System.Drawing.PointF,Northwoods.Go.GoView,Northwoods.Go.GoInputState)" /> is called each time this method is called,
/// as long as the handle is <see cref="F:Northwoods.Go.GoBalloon.AnchorHandle" />.
/// The implementation of <see cref="M:Northwoods.Go.GoBalloon.PickNewAnchor(System.Drawing.PointF,Northwoods.Go.GoView,Northwoods.Go.GoInputState)" /> will actually set <see cref="P:Northwoods.Go.GoBalloon.Anchor" />
/// when <paramref name="evttype" /> is <see cref="F:Northwoods.Go.GoInputState.Finish" />.
/// </para>
/// <para>
/// Instead of reusing the resizing mechanism to reanchor a balloon,
/// we may replace this mechanism with a separate reanchoring tool,
/// if the need for more flexibility becomes apparent.
/// </para>
/// </remarks>
public override void DoResize(GoView view, RectangleF origRect, PointF newPoint, int whichHandle, GoInputState evttype, SizeF min, SizeF max)
{
if (whichHandle == 1026)
{
switch (evttype)
{
case GoInputState.Start:
break;
case GoInputState.Continue:
if (myTemporaryAnchor == null)
{
GoObject goObject = new GoRectangle();
PointF pointF = ComputeAnchorPoint();
goObject.Bounds = new RectangleF(pointF.X, pointF.Y, 0f, 0f);
myTemporaryAnchor = goObject;
}
myTemporaryAnchor.Position = newPoint;
PickNewAnchor(newPoint, view, evttype);
UpdateRoute();
break;
case GoInputState.Finish:
myTemporaryAnchor = null;
PickNewAnchor(newPoint, view, evttype);
UpdateRoute();
break;
case GoInputState.Cancel:
myTemporaryAnchor = null;
PickNewAnchor(newPoint, view, evttype);
break;
}
}
else
{
base.DoResize(view, origRect, newPoint, whichHandle, evttype, min, max);
}
}
