/// <summary>
/// Draw this handle according to the handle's style.
/// </summary>
/// <param name="g"></param>
/// <param name="view"></param>
/// <remarks>
/// Handles never have shadows, but their outlines and fills
/// can be specified by the <see cref="P:Northwoods.Go.GoShape.Pen" /> and
/// <see cref="P:Northwoods.Go.GoShape.Brush" /> properties.
/// Hollow handles (those with a <see cref="P:Northwoods.Go.GoHandle.GoObject" />.<c>NoHandle</c>
/// <see cref="P:Northwoods.Go.GoHandle.HandleID" />), should have no <see cref="P:Northwoods.Go.GoShape.Brush" />.
/// </remarks>
public override void Paint(Graphics g, GoView view)
{
RectangleF bounds = Bounds;
switch (Style)
{
case GoHandleStyle.None:
break;
default:
GoShape.DrawRectangle(g, view, Pen, Brush, bounds.X, bounds.Y, bounds.Width, bounds.Height);
break;
case GoHandleStyle.Ellipse:
GoShape.DrawEllipse(g, view, Pen, Brush, bounds.X, bounds.Y, bounds.Width, bounds.Height);
break;
case GoHandleStyle.Diamond:
{
PointF[] array2 = view.AllocTempPointArray(4);
array2[0].X = bounds.X + bounds.Width / 2f;
array2[0].Y = bounds.Y;
array2[1].X = bounds.X + bounds.Width;
array2[1].Y = bounds.Y + bounds.Height / 2f;
array2[2].X = array2[0].X;
array2[2].Y = bounds.Y + bounds.Height;
array2[3].X = bounds.X;
array2[3].Y = array2[1].Y;
GoShape.DrawPolygon(g, view, Pen, Brush, array2);
view.FreeTempPointArray(array2);
break;
}
case GoHandleStyle.TriangleTopLeft:
case GoHandleStyle.TriangleTopRight:
case GoHandleStyle.TriangleBottomRight:
case GoHandleStyle.TriangleBottomLeft:
case GoHandleStyle.TriangleMiddleTop:
case GoHandleStyle.TriangleMiddleRight:
case GoHandleStyle.TriangleMiddleBottom:
case GoHandleStyle.TriangleMiddleLeft:
{
PointF[] array = view.AllocTempPointArray(3);
ComputeTrianglePoints(array);
GoShape.DrawPolygon(g, view, Pen, Brush, array);
view.FreeTempPointArray(array);
break;
}
}
}
/// <summary>
/// The appearance of this handle depends on the <see cref="P:Northwoods.Go.IGoCollapsible.Collapsible" />
/// and <see cref="P:Northwoods.Go.IGoCollapsible.IsExpanded" /> properties.
/// </summary>
/// <param name="g"></param>
/// <param name="view"></param>
/// <remarks>
/// If the parent is not <see cref="P:Northwoods.Go.IGoCollapsible.Collapsible" />,
/// this draws a circle inside the rectangle.
/// Otherwise, the appearance depends on the value of <see cref="P:Northwoods.Go.GoCollapsibleHandle.Style" />.
/// </remarks>
protected virtual void PaintHandle(Graphics g, GoView view)
{
IGoCollapsible goCollapsible = FindCollapsible();
if (goCollapsible == null)
{
return;
}
RectangleF bounds = Bounds;
if (goCollapsible.Collapsible)
{
float num = bounds.X + bounds.Width / 2f;
float num2 = bounds.Y + bounds.Height / 2f;
switch (Style)
{
case GoCollapsibleHandleStyle.PlusMinus:
{
float num9 = Bordered ? (bounds.Width / 4f) : 0f;
float num10 = Bordered ? (bounds.Height / 4f) : 0f;
GoShape.DrawLine(g, view, Pen, bounds.X + num9, num2, bounds.X + bounds.Width - num9, num2);
if (!goCollapsible.IsExpanded)
{
GoShape.DrawLine(g, view, Pen, num, bounds.Y + num10, num, bounds.Y + bounds.Height - num10);
}
break;
}
case GoCollapsibleHandleStyle.TriangleRight:
{
float num7 = Bordered ? (bounds.Width / 6f) : 0f;
float num8 = Bordered ? (bounds.Height / 6f) : 0f;
PointF[] array3 = view.AllocTempPointArray(3);
if (goCollapsible.IsExpanded)
{
array3[0].X = bounds.X + num7;
array3[0].Y = bounds.Y + num8;
array3[1].X = bounds.X + bounds.Width - num7;
array3[1].Y = num2;
array3[2].X = bounds.X + num7;
array3[2].Y = bounds.Y + bounds.Height - num8;
}
else
{
array3[0].X = bounds.X + num7;
array3[0].Y = bounds.Y + num8;
array3[1].X = bounds.X + bounds.Width - num7;
array3[1].Y = bounds.Y + num8;
array3[2].X = num;
array3[2].Y = bounds.Y + bounds.Height - num8;
}
SolidBrush solidBrush2 = new SolidBrush(GoShape.GetPenColor(Pen, Color.Black));
GoShape.DrawPolygon(g, view, null, solidBrush2, array3);
solidBrush2.Dispose();
view.FreeTempPointArray(array3);
break;
}
case GoCollapsibleHandleStyle.TriangleUp:
{
float num5 = Bordered ? (bounds.Width / 6f) : 0f;
float num6 = Bordered ? (bounds.Height / 6f) : 0f;
PointF[] array2 = view.AllocTempPointArray(3);
if (goCollapsible.IsExpanded)
{
array2[0].X = bounds.X + num5;
array2[0].Y = bounds.Y + bounds.Height - num6;
array2[1].X = bounds.X + bounds.Width - num5;
array2[1].Y = bounds.Y + bounds.Height - num6;
array2[2].X = num;
array2[2].Y = bounds.Y + num6;
}
else
{
array2[0].X = bounds.X + num5;
array2[0].Y = bounds.Y + num6;
array2[1].X = bounds.X + bounds.Width - num5;
array2[1].Y = bounds.Y + num6;
array2[2].X = num;
array2[2].Y = bounds.Y + bounds.Height - num6;
}
SolidBrush solidBrush = new SolidBrush(GoShape.GetPenColor(Pen, Color.Black));
GoShape.DrawPolygon(g, view, null, solidBrush, array2);
solidBrush.Dispose();
view.FreeTempPointArray(array2);
break;
}
case GoCollapsibleHandleStyle.ChevronUp:
{
float num3 = Bordered ? (bounds.Width / 6f) : 0f;
float num4 = Bordered ? (bounds.Height / 6f) : 0f;
PointF[] array = view.AllocTempPointArray(3);
if (goCollapsible.IsExpanded)
{
array[0].X = bounds.X + num3;
array[0].Y = num2;
array[1].X = num;
array[1].Y = bounds.Y + num4;
array[2].X = bounds.X + bounds.Width - num3;
array[2].Y = num2;
GoShape.DrawLines(g, view, Pen, array);
array[0].X = bounds.X + num3;
array[0].Y = bounds.Y + bounds.Height - num4;
array[1].X = num;
array[1].Y = num2;
array[2].X = bounds.X + bounds.Width - num3;
array[2].Y = bounds.Y + bounds.Height - num4;
GoShape.DrawLines(g, view, Pen, array);
}
else
{
array[0].X = bounds.X + num3;
array[0].Y = bounds.Y + num4;
array[1].X = num;
array[1].Y = num2;
array[2].X = bounds.X + bounds.Width - num3;
array[2].Y = bounds.Y + num4;
GoShape.DrawLines(g, view, Pen, array);
array[0].X = bounds.X + num3;
array[0].Y = num2;
array[1].X = num;
array[1].Y = bounds.Y + bounds.Height - num4;
array[2].X = bounds.X + bounds.Width - num3;
array[2].Y = num2;
GoShape.DrawLines(g, view, Pen, array);
}
view.FreeTempPointArray(array);
break;
}
}
}
else
{
GoShape.DrawEllipse(g, view, Pen, null, bounds.X + bounds.Width / 4f, bounds.Y + bounds.Height / 4f, bounds.Width / 2f, bounds.Height / 2f);
}
}
