/// <summary>
/// Draws node background. 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 OnRenderNodeBackground method so events can occur.
/// </summary>
/// <param name="e">Information provided for rendering.</param>
public override void DrawNodeBackground(NodeRendererEventArgs e)
{
ElementStyleDisplayInfo di=GetElementStyleDisplayInfo(e.Style,e.Graphics,DisplayHelp.GetDrawRectangle(e.NodeBounds));
ElementStyleDisplay.Paint(di);
base.DrawNodeBackground(e);
}
/// <summary>
/// Draws node background. 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 OnRenderNodeBackground method so events can occur.
/// </summary>
/// <param name="e">Information provided for rendering.</param>
public override void DrawNodeBackground(NodeRendererEventArgs e)
{
ElementStyleDisplayInfo di=GetElementStyleDisplayInfo(e.Style,e.Graphics,DisplayHelp.GetDrawRectangle(e.NodeBounds));
PaintBackground(e);
ElementStyleDisplay.PaintBackgroundImage(di);
ElementStyleDisplay.PaintBorder(di);
// Let events occur
OnRenderNodeBackground(e);
}
/// <summary>
/// Paints background of the node.
/// </summary>
/// <param name="e">Context information.</param>
protected virtual void PaintBackground(NodeRendererEventArgs e)
{
Graphics g = e.Graphics;
bool mouseOver = e.Node.IsMouseOver;
Region oldClip = g.Clip;
Rectangle clipRect=e.NodeBounds;
clipRect.Width--;
clipRect.Height--;
g.SetClip(clipRect, CombineMode.Replace);
// Prepare colors
NodeColors colors=new NodeColors();
colors.NodeTopGradientBegin = m_ColorTable.NodeTopGradientBegin;
colors.NodeTopGradientMiddle = m_ColorTable.NodeTopGradientMiddle;
colors.NodeTopGradientEnd = m_ColorTable.NodeTopGradientEnd;
colors.NodeTopGradientType = m_ColorTable.NodeTopGradientType;
colors.NodeTopGradientAngle = m_ColorTable.NodeTopGradientAngle;
colors.NodeBottomGradientBegin = m_ColorTable.NodeBottomGradientBegin;
colors.NodeBottomGradientMiddle = m_ColorTable.NodeBottomGradientMiddle;
colors.NodeBottomGradientEnd = m_ColorTable.NodeBottomGradientEnd;
colors.NodeBottomGradientType = m_ColorTable.NodeBottomGradientType;
colors.NodeBottomGradientAngle = m_ColorTable.NodeBottomGradientAngle;
if(mouseOver)
{
colors.NodeTopGradientBegin = m_ColorTable.NodeMouseOverTopGradientBegin;
colors.NodeTopGradientMiddle = m_ColorTable.NodeMouseOverTopGradientMiddle;
colors.NodeTopGradientEnd = m_ColorTable.NodeMouseOverTopGradientEnd;
colors.NodeTopGradientType = m_ColorTable.NodeMouseOverTopGradientType;
colors.NodeTopGradientAngle = m_ColorTable.NodeMouseOverTopGradientAngle;
colors.NodeBottomGradientBegin = m_ColorTable.NodeMouseOverBottomGradientBegin;
colors.NodeBottomGradientMiddle = m_ColorTable.NodeMouseOverBottomGradientMiddle;
colors.NodeBottomGradientEnd = m_ColorTable.NodeMouseOverBottomGradientEnd;
colors.NodeBottomGradientType = m_ColorTable.NodeMouseOverBottomGradientType;
colors.NodeBottomGradientAngle = m_ColorTable.NodeMouseOverBottomGradientAngle;
}
// Paint Background, Top Part
Rectangle bounds=DisplayHelp.GetDrawRectangle(ElementStyleDisplay.GetBackgroundRectangle(e.Style,e.NodeBounds));
GraphicsPath path;
if (g.SmoothingMode == SmoothingMode.AntiAlias)
{
Rectangle r = bounds;
r.Width--;
path = ElementStyleDisplay.GetBackgroundPath(e.Style, r, eStyleBackgroundPathPart.TopHalf);
}
else
path = ElementStyleDisplay.GetBackgroundPath(e.Style, bounds, eStyleBackgroundPathPart.TopHalf);
path.CloseAllFigures();
Rectangle backRect = bounds;
backRect.Height = backRect.Height/2;
PaintBackgroundPart(g, backRect, path, colors.NodeTopGradientBegin, colors.NodeTopGradientEnd,
colors.NodeTopGradientType, colors.NodeTopGradientAngle);
Rectangle ellipse = new Rectangle(bounds.X, bounds.Y - bounds.Height / 2, bounds.Width, bounds.Height);
GraphicsPath pathFill=new GraphicsPath();
pathFill.AddEllipse(ellipse);
PathGradientBrush pathBrush = new PathGradientBrush(pathFill);
pathBrush.CenterColor = colors.NodeTopGradientMiddle;
pathBrush.SurroundColors = new Color[] { Color.Transparent };
pathBrush.CenterPoint = new PointF(ellipse.X + ellipse.Width / 2, bounds.Y);
Blend blend = new Blend();
blend.Factors = new float[] { 0f, .8f, 1f };
blend.Positions = new float[] { .0f, .8f, 1f };
pathBrush.Blend = blend;
pathFill.Dispose();
g.FillPath(pathBrush, path);
pathBrush.Dispose();
path.Dispose();
// Bottom Part
if (g.SmoothingMode == SmoothingMode.AntiAlias)
{
Rectangle r = bounds;
r.Width--;
path = ElementStyleDisplay.GetBackgroundPath(e.Style, r, eStyleBackgroundPathPart.BottomHalf);
}
else
path = ElementStyleDisplay.GetBackgroundPath(e.Style, bounds, eStyleBackgroundPathPart.BottomHalf);
path.CloseAllFigures();
backRect.Y += backRect.Height;
PaintBackgroundPart(g, backRect, path, colors.NodeBottomGradientBegin, colors.NodeBottomGradientEnd,
colors.NodeBottomGradientType, colors.NodeBottomGradientAngle);
ellipse = new Rectangle(bounds.X, bounds.Y + bounds.Height / 2 - 2, bounds.Width, bounds.Height + 4);
pathFill=new GraphicsPath();
pathFill.AddEllipse(ellipse);
pathBrush = new PathGradientBrush(pathFill);
pathBrush.CenterColor = colors.NodeBottomGradientMiddle;
pathBrush.SurroundColors = new Color[] { Color.Transparent };
pathBrush.CenterPoint = new PointF(ellipse.X + ellipse.Width / 2, bounds.Bottom);
blend = new Blend();
blend.Factors = new float[] { 0f, .5f, 1f };
blend.Positions = new float[] { .0f, .4f, 1f };
pathBrush.Blend = blend;
//path.Dispose();
g.FillPath(pathBrush, path);
pathBrush.Dispose();
pathFill.Dispose();
path.Dispose();
if (oldClip != null)
g.Clip = oldClip;
else
g.ResetClip();
}
/// <summary>
/// Raises RenderNodeBackground event.
/// </summary>
/// <param name="e">Event arguments.</param>
protected virtual void OnRenderNodeBackground(NodeRendererEventArgs e)
{
if(RenderNodeBackground!=null)
RenderNodeBackground(this,e);
}
/// <summary>
/// Draws node background. 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 OnRenderNodeBackground method so events can occur.
/// </summary>
/// <param name="e">Information provided for rendering.</param>
public virtual void DrawNodeBackground(NodeRendererEventArgs e)
{
OnRenderNodeBackground(e);
}
