public override bool DoMouseUp(int x, int y, Modifier keys, InteractivePlotSurface2D ps)
{
ps.QueueDraw(this.extent);
this.active = false;
this.extent = Rectangle.Empty;
if (this.Measurement != null)
{
if (ps.PhysicalXAxis1Cache != null && ps.PhysicalYAxis1Cache != null)
{
var args = new MeasurementArgs();
args.End = args.Start = new PointF(
(float)ps.PhysicalXAxis1Cache.PhysicalToWorld(this.start, true),
(float)ps.PhysicalYAxis1Cache.PhysicalToWorld(this.start, true)
);
this.Measurement(ps, args);
}
}
return false;
}
public override bool DoMouseMove(int x, int y, Modifier keys, InteractivePlotSurface2D ps)
{
Rectangle previous = this.extent;
// If the mouse is being dragged then set the end point and extent
// rectangle accordingly. Otherwise simply set the start coordinates
// the current cursor position.
if (this.active)
{
this.end = new Point(x, y);
this.extent = new Rectangle(
Math.Min(this.start.X, this.end.X) - this.offset,
Math.Min(this.start.Y, this.end.Y) - this.offset,
Math.Abs(this.end.X - this.start.X) + this.offset * 2 + 1,
Math.Abs(this.end.Y - this.start.Y) + this.offset * 2 + 1
);
}
else
{
this.start = new Point(x, y);
this.extent = Rectangle.Empty;
}
// If an event handler has been set then throw the latest world
// coordinates at it. Start and end points are set the same if
// the cursor is not being dragged.
if (this.Measurement != null)
{
if (ps.PhysicalXAxis1Cache != null && ps.PhysicalYAxis1Cache != null)
{
var args = new MeasurementArgs();
args.Start = new PointF(
(float)ps.PhysicalXAxis1Cache.PhysicalToWorld(this.start, true),
(float)ps.PhysicalYAxis1Cache.PhysicalToWorld(this.start, true)
);
args.End = !this.active ? args.Start : new PointF(
(float)ps.PhysicalXAxis1Cache.PhysicalToWorld(this.end, true),
(float)ps.PhysicalYAxis1Cache.PhysicalToWorld(this.end, true)
);
this.Measurement(ps, args);
}
}
ps.QueueDraw(previous);
ps.QueueDraw(this.extent);
return false;
}