/// <summary>
/// Implement the single-click behavior for this handle, to toggle the
/// expansion state of the <see cref="T:Northwoods.Go.IGoCollapsible" /> that this handle is in.
/// </summary>
/// <param name="evt"></param>
/// <param name="view"></param>
/// <returns>true if the parent <see cref="P:Northwoods.Go.IGoCollapsible.Collapsible" /> property is true</returns>
/// <remarks>
/// If <see cref="P:Northwoods.Go.IGoCollapsible.IsExpanded" /> is true, this calls <see cref="M:Northwoods.Go.IGoCollapsible.Collapse" />;
/// otherwise this calls <see cref="M:Northwoods.Go.IGoCollapsible.Expand" />.
/// If the view is non-null, this method calls <see cref="M:Northwoods.Go.GoView.StartTransaction" />
/// and <see cref="M:Northwoods.Go.GoView.FinishTransaction(System.String)" />, with a transaction name specified by
/// the value of <see cref="F:Northwoods.Go.GoUndoManager.CollapsedName" /> or <see cref="F:Northwoods.Go.GoUndoManager.ExpandedName" />.
/// </remarks>
public override bool OnSingleClick(GoInputEventArgs evt, GoView view)
{
IGoCollapsible goCollapsible = FindCollapsible();
if (goCollapsible == null)
{
return(false);
}
string tname = null;
try
{
view?.StartTransaction();
if (goCollapsible.IsExpanded)
{
goCollapsible.Collapse();
tname = "Collapsed";
}
else
{
goCollapsible.Expand();
tname = "Expanded";
}
}
finally
{
view?.FinishTransaction(tname);
}
return(true);
}
/// <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);
}
}
/// <summary>
/// The path is the same as a regular rectangle if <see cref="P:Northwoods.Go.GoCollapsibleHandle.Bordered" />,
/// but augmented with the shape(s) determined by the <see cref="P:Northwoods.Go.GoCollapsibleHandle.Style" />.
/// </summary>
/// <returns>a <c>GraphicsPath</c></returns>
public override GraphicsPath MakePath()
{
GraphicsPath graphicsPath = (!Bordered) ? new GraphicsPath(FillMode.Winding) : base.MakePath();
IGoCollapsible goCollapsible = FindCollapsible();
if (goCollapsible != null)
{
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;
graphicsPath.StartFigure();
graphicsPath.AddLine(bounds.X + num9, num2, bounds.X + bounds.Width - num9, num2);
if (!goCollapsible.IsExpanded)
{
graphicsPath.StartFigure();
graphicsPath.AddLine(num, bounds.Y + num9, 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 = new PointF[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;
}
graphicsPath.StartFigure();
graphicsPath.AddPolygon(array3);
break;
}
case GoCollapsibleHandleStyle.TriangleUp:
{
float num5 = Bordered ? (bounds.Width / 6f) : 0f;
float num6 = Bordered ? (bounds.Height / 6f) : 0f;
PointF[] array2 = new PointF[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;
}
graphicsPath.StartFigure();
graphicsPath.AddPolygon(array2);
break;
}
case GoCollapsibleHandleStyle.ChevronUp:
{
float num3 = Bordered ? (bounds.Width / 6f) : 0f;
float num4 = Bordered ? (bounds.Height / 6f) : 0f;
PointF[] array = new PointF[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;
graphicsPath.StartFigure();
graphicsPath.AddLines(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;
graphicsPath.StartFigure();
graphicsPath.AddLines(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;
graphicsPath.StartFigure();
graphicsPath.AddLines(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;
graphicsPath.StartFigure();
graphicsPath.AddLines(array);
}
break;
}
}
}
else
{
graphicsPath.AddEllipse(bounds.X + bounds.Width / 4f, bounds.Y + bounds.Height / 4f, bounds.Width / 2f, bounds.Height / 2f);
}
}
return(graphicsPath);
}
