internal override DialogResult Edit(dlgDrawings owner)
{
DialogResult ret = DialogResult.None;
dlgEditArc dlgArc = new dlgEditArc();
dlgArc.LoadData(this, owner);
ret = dlgArc.ShowDialog(owner);
return(ret);
}
protected override System.Windows.Forms.DialogResult dlgDrawingsMouseDown(object sender, System.Windows.Forms.MouseEventArgs e, ref int nStep, dlgDrawings owner)
{
System.Windows.Forms.DialogResult ret = System.Windows.Forms.DialogResult.None;
switch (nStep)
{
case 0: //first step, select up-left corner
rc.X = e.X;
rc.Y = e.Y;
nStep++;
break;
case 1: //second step, size
if (e.X > rc.X)
{
rc.Width = e.X - rc.X;
}
else
{
rc.Width = rc.X - e.X;
rc.X = e.X;
}
if (e.Y > rc.Y)
{
rc.Height = e.Y - rc.Y;
}
else
{
rc.Height = rc.Y - e.Y;
rc.Y = e.Y;
}
nStep++;
break;
case 2: //start angle
{
int x = rc.X + rc.Width / 2;
int y = rc.Y + rc.Height / 2;
x = e.X - x;
y = e.Y - y;
this.startAngle = (float)((180 / System.Math.PI) * System.Math.Atan2((double)y, (double)x));
nStep++;
}
break;
case 3: //end angle
{
int x = rc.X + rc.Width / 2;
int y = rc.Y + rc.Height / 2;
x = e.X - x;
y = e.Y - y;
float a = (float)((180 / System.Math.PI) * System.Math.Atan2((double)y, (double)x));
this.sweepAngle = a - this.startAngle;
nStep++;
owner.Invalidate();
dlgEditArc dlgArc = new dlgEditArc();
dlgArc.LoadData(this, owner);
ret = dlgArc.ShowDialog(owner);
}
break;
}
step = nStep;
return(ret);
}