protected Pen GetExpandPen(NodeExpandPartRendererEventArgs e)
{
if (e.ExpandLineColor.IsEmpty)
{
TreeExpandColorTable ct = GetExpandColorTable(e);
if (ct != null)
{
bool expanded = e.Node.Expanded;
if (expanded)
{
// Collapse node colors
if (!e.IsMouseOver && ct.CollapseForeground != null)
return ct.CollapseForeground.CreatePen(1);
else if (e.IsMouseOver && ct.CollapseMouseOverForeground != null)
return ct.CollapseMouseOverForeground.CreatePen(1);
}
else
{
// Collapse node colors
if (!e.IsMouseOver && ct.ExpandForeground != null)
return ct.ExpandForeground.CreatePen(1);
else if (e.IsMouseOver && ct.ExpandMouseOverForeground != null)
return ct.ExpandMouseOverForeground.CreatePen(1);
}
}
return GetBorderPen(e);
}
return new Pen(e.ExpandLineColor,1);
}
protected Pen GetBorderPen(NodeExpandPartRendererEventArgs e)
{
if(!e.BorderColor.IsEmpty)
return new Pen(e.BorderColor,1);
if (_ColorTable != null)
{
bool expanded = e.Node.Expanded;
TreeExpandColorTable ct = GetExpandColorTable(e);
if (ct == null) return null;
if (expanded)
{
// Collapse node colors
if (!e.IsMouseOver && ct.CollapseBorder != null)
return ct.CollapseBorder.CreatePen();
else if (e.IsMouseOver && ct.CollapseMouseOverBorder != null)
return ct.CollapseMouseOverBorder.CreatePen();
}
else
{
// Expand node colors
if (!e.IsMouseOver && ct.ExpandBorder != null)
return ct.ExpandBorder.CreatePen();
else if (e.IsMouseOver && ct.ExpandMouseOverBorder != null)
return ct.ExpandMouseOverBorder.CreatePen();
}
}
return null;
}
/// <summary>
/// Draws image type expand button.
/// </summary>
/// <param name="e">Expand context information</param>
public override void DrawExpandButton(NodeExpandPartRendererEventArgs e)
{
if(e.Node.Expanded)
{
if(e.ExpandImageCollapse!=null)
e.Graphics.DrawImage(e.ExpandImageCollapse,e.ExpandPartBounds);
}
else if(e.ExpandImage!=null)
e.Graphics.DrawImage(e.ExpandImage,e.ExpandPartBounds);
}
private TreeExpandColorTable GetExpandColorTable(NodeExpandPartRendererEventArgs e)
{
TreeExpandColorTable ct = null;
if (e.ExpandButtonType == eExpandButtonType.Rectangle)
ct = _ColorTable.ExpandRectangle;
else if (e.ExpandButtonType == eExpandButtonType.Triangle)
ct = _ColorTable.ExpandTriangle;
else if (e.ExpandButtonType == eExpandButtonType.Ellipse)
ct = _ColorTable.ExpandEllipse;
return ct;
}
protected Brush GetBackgroundBrush(NodeExpandPartRendererEventArgs e)
{
if(e.BackColor.IsEmpty && e.BackColor2.IsEmpty)
return null;
if(e.BackColor2.IsEmpty)
return new SolidBrush(e.BackColor);
System.Drawing.Drawing2D.LinearGradientBrush brush=DisplayHelp.CreateLinearGradientBrush(e.ExpandPartBounds,e.BackColor,e.BackColor2,e.BackColorGradientAngle);
//brush.SetSigmaBellShape(0.8f);
return brush;
}
/// <summary>Draws ellipse type expand button.</summary>
/// <param name="e">Expand context drawing information.</param>
public override void DrawExpandButton(NodeExpandPartRendererEventArgs e)
{
if(e.ExpandPartBounds.IsEmpty)
return;
Brush brush=GetBackgroundBrush(e);
if(brush!=null)
{
e.Graphics.FillEllipse(brush,e.ExpandPartBounds);
brush.Dispose();
}
Pen pen=GetBorderPen(e);
if (pen != null)
{
SmoothingMode sm = e.Graphics.SmoothingMode;
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
e.Graphics.DrawEllipse(pen, e.ExpandPartBounds);
e.Graphics.SmoothingMode = sm;
pen.Dispose();
pen = null;
}
if(e.Node.Expanded)
{
pen = GetExpandPen(e);
if (pen != null)
{
e.Graphics.DrawLine(pen, e.ExpandPartBounds.X + 2, e.ExpandPartBounds.Y + e.ExpandPartBounds.Height / 2, e.ExpandPartBounds.Right - 2, e.ExpandPartBounds.Y + e.ExpandPartBounds.Height / 2);
pen.Dispose();
}
}
else
{
pen = GetExpandPen(e);
if (pen != null)
{
e.Graphics.DrawLine(pen,e.ExpandPartBounds.X+2,e.ExpandPartBounds.Y+e.ExpandPartBounds.Height/2,e.ExpandPartBounds.Right-2,e.ExpandPartBounds.Y+e.ExpandPartBounds.Height/2);
e.Graphics.DrawLine(pen,e.ExpandPartBounds.X+e.ExpandPartBounds.Width/2,e.ExpandPartBounds.Y+2,e.ExpandPartBounds.X+e.ExpandPartBounds.Width/2,e.ExpandPartBounds.Bottom-2);
pen.Dispose();
}
}
}
/// <summary>
/// Draw triangular type expand button.
/// </summary>
/// <param name="e">Expand button context information.</param>
public override void DrawExpandButton(NodeExpandPartRendererEventArgs e)
{
if (e.ExpandPartBounds.IsEmpty)
return;
SmoothingMode sm = e.Graphics.SmoothingMode;
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
Rectangle r = new Rectangle(e.ExpandPartBounds.X , e.ExpandPartBounds.Y + (e.ExpandPartBounds.Height - 8) / 2, 5, 8);
GraphicsPath path = null;
if (e.Node.Expanded)
{
path = new GraphicsPath();
path.AddLine(r.X, r.Y + 5, r.X + 5, r.Y);
path.AddLine(r.X + 5, r.Y, r.X + 5, r.Y + 5);
path.CloseAllFigures();
}
else
{
path = new GraphicsPath();
path.AddLine(r.X, r.Y, r.X, r.Bottom);
path.AddLine(r.X, r.Bottom, r.X + 4, r.Y + r.Height / 2);
path.CloseAllFigures();
}
Brush brush = GetBackgroundBrush(e);
if (brush != null)
{
e.Graphics.FillPath(brush, path);
brush.Dispose();
}
Pen pen = GetBorderPen(e);
if(pen!=null)
{
e.Graphics.DrawPath(pen, path);
pen.Dispose();
}
e.Graphics.SmoothingMode = sm;
if(path!=null) path.Dispose();
}
/// <summary>Draws ellipse type expand button.</summary>
/// <param name="e">Expand context drawing information.</param>
public override void DrawExpandButton(NodeExpandPartRendererEventArgs e)
{
Rectangle expandPartBounds = e.ExpandPartBounds;
if (expandPartBounds.IsEmpty)
return;
Brush brush = GetBackgroundBrush(e);
expandPartBounds.Width--;
expandPartBounds.Height--;
if (brush != null)
{
e.Graphics.FillEllipse(brush, expandPartBounds);
brush.Dispose();
}
using (Pen pen = GetBorderPen(e))
{
e.Graphics.DrawEllipse(pen, expandPartBounds);
}
if (e.Node.Expanded)
{
using (Pen pen = GetExpandPen(e))
{
e.Graphics.DrawLine(pen, expandPartBounds.X + 2, expandPartBounds.Y + expandPartBounds.Height / 2, expandPartBounds.Right - 2, expandPartBounds.Y + expandPartBounds.Height / 2);
}
}
else
{
using (Pen pen = GetExpandPen(e))
{
e.Graphics.DrawLine(pen, expandPartBounds.X + 2, expandPartBounds.Y + expandPartBounds.Height / 2, expandPartBounds.Right - 2, expandPartBounds.Y + expandPartBounds.Height / 2);
e.Graphics.DrawLine(pen, expandPartBounds.X + expandPartBounds.Width / 2, expandPartBounds.Y + 2, expandPartBounds.X + expandPartBounds.Width / 2, expandPartBounds.Bottom - 2);
}
}
}
protected Pen GetExpandPen(NodeExpandPartRendererEventArgs e)
{
return new Pen(e.ExpandLineColor,1);
}
protected Pen GetBorderPen(NodeExpandPartRendererEventArgs e)
{
return new Pen(e.BorderColor,1);
}
/// <summary>Draws expand button.</summary> /// <param name="e">Context parameters for drawing expand button.</param> public abstract void DrawExpandButton(NodeExpandPartRendererEventArgs e);
/// <summary>
/// Raises RenderNodeExpandPart event.
/// </summary>
/// <param name="e"></param>
protected virtual void OnRenderNodeExpandPart(NodeExpandPartRendererEventArgs e)
{
if(RenderNodeExpandPart!=null)
RenderNodeExpandPart(this,e);
}
/// <summary>
/// Draws node expand part. If you need to provide custom rendering this is the method that you should override in your custom rendered. If you
/// do not want default rendering to occur do not call the base implementation. You can call OnRenderNodeExpandPart method so events can occur.
/// </summary>
/// <param name="e">Information provided for rendering.</param>
public virtual void DrawNodeExpandPart(NodeExpandPartRendererEventArgs e)
{
OnRenderNodeExpandPart(e);
}
/// <summary>
/// Draws node expand part. If you need to provide custom rendering this is the method that you should override in your custom rendered. If you
/// do not want default rendering to occur do not call the base implementation. You can call OnRenderNodeExpandPart method so events can occur.
/// </summary>
/// <param name="e">Information provided for rendering.</param>
public override void DrawNodeExpandPart(NodeExpandPartRendererEventArgs e)
{
GetExpandDisplay(e.ExpandButtonType).DrawExpandButton(e);
base.DrawNodeExpandPart(e);
}
protected Brush GetBackgroundBrush(NodeExpandPartRendererEventArgs e)
{
if (e.BackColor.IsEmpty && e.BackColor2.IsEmpty)
{
bool expanded = e.Node.Expanded;
TreeExpandColorTable ct = GetExpandColorTable(e);
if (ct == null) return null;
if (expanded)
{
// Collapse node colors
if (!e.IsMouseOver && ct.CollapseFill != null)
return ct.CollapseFill.CreateBrush(e.ExpandPartBounds);
else if (e.IsMouseOver && ct.CollapseMouseOverFill != null)
return ct.CollapseMouseOverFill.CreateBrush(e.ExpandPartBounds);
}
else
{
// Expand node colors
if (!e.IsMouseOver && ct.ExpandFill != null)
return ct.ExpandFill.CreateBrush(e.ExpandPartBounds);
else if (e.IsMouseOver && ct.ExpandMouseOverFill != null)
return ct.ExpandMouseOverFill.CreateBrush(e.ExpandPartBounds);
}
return null;
}
if(e.BackColor2.IsEmpty)
return new SolidBrush(e.BackColor);
System.Drawing.Drawing2D.LinearGradientBrush brush=DisplayHelp.CreateLinearGradientBrush(e.ExpandPartBounds,e.BackColor,e.BackColor2,e.BackColorGradientAngle);
//brush.SetSigmaBellShape(0.8f);
return brush;
}
