// draw the header:
// class name and expand button
private RectD DrawHeader(IRenderContext context, VisualGroup group, ClassInfo info, RectD box)
{
float height = titleFont.Height + typeFont.Height + 5 + 2;
var headerBox = new RectD(box.X, box.Y, box.Width, height);
LinearGradientBrush brush = new LinearGradientBrush(headerBox.ToRectangleF(), Color.LightBlue, Color.White, LinearGradientMode.Horizontal);
group.Add(new RoundedRectangleVisual(headerBox, 7)
{
Brush = brush
});
if (info.ShowDetails)
{
// If the node is expanded, we need to fill in the lower corners as well
var secondHeaderBox = new RectD(headerBox.X, headerBox.Y + headerBox.Height / 2, headerBox.Width, headerBox.Height / 2);
group.Add(new RectangleVisual(secondHeaderBox)
{
Brush = brush
});
}
var textBox = new RectD(box.X + 5, box.Y + 5, box.Width - 20, titleFont.Height);
DrawTrimmedString(context, group, info.Name, titleFont, titleBrush, textBox);
textBox = new RectD(box.X + 5, box.Y + titleFont.Height + 7, box.Width - 20, typeFont.Height);
DrawTrimmedString(context, group, info.Type, typeFont, typeBrush, textBox);
Image image = info.ShowDetails ? imageUp2 : imageDown2;
group.Add(new ImageVisual {
Image = image, Rectangle = new RectD(box.X + box.Width - ImageSize - 5, box.Y + 5, ImageSize, ImageSize)
});
return(new RectD(box.X, box.Y + height, box.Width, box.Height - height));
}
void IVisual.Paint(IRenderContext context, Graphics graphics)
{
bool enabled = false;
if (button != null)
{
enabled = button.CanExecute((INode)label.Owner, context.CanvasControl);
}
var layout = new RectD(labelLayout.AnchorX, labelLayout.AnchorY - label.PreferredSize.Height,
label.PreferredSize.Width, label.PreferredSize.Height);
Brush backgroundBrush;
Pen foregroundPen;
if (enabled)
{
// enabled style
backgroundBrush = new LinearGradientBrush(layout.TopLeft, layout.BottomLeft,
Mix(Color.White, backgroundColor, 0.5d), backgroundColor);
foregroundPen = new Pen(foregroundColor);
}
else
{
// disabled style
backgroundBrush = new LinearGradientBrush(layout.TopLeft, layout.BottomLeft,
Mix(Color.White, backgroundColor, 0.7),
Mix(Color.White, backgroundColor, 0.7));
foregroundPen = new Pen(Mix(Color.White, foregroundColor, 0.7));
}
graphics.FillEllipse(backgroundBrush, layout.ToRectangleF());
GraphicsPath path;
switch (icon)
{
case ButtonIcon.ShowParent:
path = new GraphicsPath(
new PointF[] {
layout.TopLeft + new PointD(layout.Width * 0.3, layout.Height * 0.7),
layout.TopLeft + new PointD(layout.Width * 0.7, layout.Height * 0.7),
layout.TopLeft + new PointD(layout.Width * 0.5, layout.Height * 0.3)
},
new[] { (byte)PathPointType.Start, (byte)PathPointType.Line, (byte)PathPointType.Line });
path.CloseAllFigures();
graphics.DrawPath(foregroundPen, path);
break;
case ButtonIcon.HideParent:
path = new GraphicsPath(
new PointF[] {
layout.TopLeft + new PointD(layout.Width * 0.3, layout.Height * 0.3),
layout.TopLeft + new PointD(layout.Width * 0.7, layout.Height * 0.3),
layout.TopLeft + new PointD(layout.Width * 0.5, layout.Height * 0.7)
},
new[] { (byte)PathPointType.Start, (byte)PathPointType.Line, (byte)PathPointType.Line });
path.CloseAllFigures();
graphics.DrawPath(foregroundPen, path);
break;
case ButtonIcon.ShowChildren:
graphics.DrawLine(foregroundPen, layout.TopLeft + new PointD(layout.Width * 0.3, layout.Height * 0.5),
layout.TopLeft + new PointD(layout.Width * 0.7, layout.Height * 0.5));
graphics.DrawLine(foregroundPen, layout.TopLeft + new PointD(layout.Width * 0.5, layout.Height * 0.3),
layout.TopLeft + new PointD(layout.Width * 0.5, layout.Height * 0.7));
break;
case ButtonIcon.HideChildren:
graphics.DrawLine(foregroundPen, layout.TopLeft + new PointD(layout.Width * 0.3, layout.Height * 0.5),
layout.TopLeft + new PointD(layout.Width * 0.7, layout.Height * 0.5));
break;
default:
throw new ArgumentOutOfRangeException();
}
}