public override void onPressMainBtn()
{
switch (state)
{
case StateEnumCL.NonEnter:
state = StateEnumCL.FirstEnter;
Shell.Instance.Clear();
p1 = new Polygon();
a = b = null;
BTNEnter.Content = "Enter Polygon";
BTNEnter.IsEnabled = false;
break;
case StateEnumCL.FirstEnter:
Shell.Instance.StrokePolygon(p1, Colors.Green);
state = StateEnumCL.SecondEnter;
BTNEnter.Content = "Enter Line";
BTNEnter.IsEnabled = false;
break;
case StateEnumCL.SecondEnter:
break;
case StateEnumCL.ThirdEnter:
Point c, d;
if (p1.ClipLine(a, b, out c, out d))
{
Shell.Instance.DrawLine((int)c.x, (int)c.y, (int)d.x, (int)d.y, Colors.Red);
}
state = StateEnumCL.NonEnter;
BTNEnter.Content = "Start Entering";
break;
}
}
public override void onPressClearBtn()
{
p1 = new Polygon();
a = b = null;
state = StateEnumCL.NonEnter;
Shell.Instance.Clear();
BTNEnter.Content = "Start Entering";
}
public override void onPressPixel(int x, int y)
{
Polygon temp;
switch (state)
{
case StateEnumCL.FirstEnter:
temp = (Polygon)p1.Clone();
temp.AddPoint(x, y);
if (temp.IsSimple && temp.IsConvex)
{
p1.AddPoint(x, y);
Shell.Instance.Clear();
Shell.Instance.StrokePolygon(p1, Colors.Green, true);
}
if (p1.Length > 2)
{
BTNEnter.IsEnabled = true;
}
break;
case StateEnumCL.SecondEnter:
if (a == null)
{
a = new Point()
{
x = x, y = y
}
}
;
else
if (b == null)
{
b = new Point()
{
x = x, y = y
};
Shell.Instance.DrawLine((int)a.x, (int)a.y, (int)b.x, (int)b.y, Colors.Blue);
state = StateEnumCL.ThirdEnter;
BTNEnter.Content = "Clip";
BTNEnter.IsEnabled = true;
}
break;
}
}
