/// <summary>
/// Occurs during the drawing of an item.
/// </summary>
/// <param name="e">The event args.</param>
protected override void OnDrawItem(DrawItemEventArgs e)
{
Rectangle outer = e.Bounds;
outer.Inflate(1, 1);
e.Graphics.FillRectangle(Brushes.White, outer);
Brush fontBrush = Brushes.Black;
if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
{
Rectangle r = e.Bounds;
r.Inflate(-1, -1);
e.Graphics.FillRectangle(SymbologyGlobal.HighlightBrush(r, Color.FromArgb(215, 238, 252)), r);
Pen p = new Pen(Color.FromArgb(215, 238, 252));
SymbologyGlobal.DrawRoundedRectangle(e.Graphics, p, e.Bounds);
p.Dispose();
}
string name = Items[e.Index].ToString();
FontFamily ff = new FontFamily(name);
Font fnt = new Font("Arial", 10, FontStyle.Regular);
if (ff.IsStyleAvailable(FontStyle.Regular))
{
fnt = new Font(name, 10, FontStyle.Regular);
}
else if (ff.IsStyleAvailable(FontStyle.Italic))
{
fnt = new Font(name, 10, FontStyle.Italic);
}
SizeF box = e.Graphics.MeasureString(name, Font);
e.Graphics.DrawString(name, Font, fontBrush, e.Bounds.X, e.Bounds.Y);
e.Graphics.DrawString("ABC", fnt, fontBrush, e.Bounds.X + box.Width, e.Bounds.Y);
}
protected virtual PointF OnInitializeItem(DrawLegendItemArgs e)
{
if (e.Item.LegendItemVisible == false)
{
return(e.TopLeft);
}
UpdateActions(e.Item);
PointF topLeft = e.TopLeft;
PointF tempTopLeft = topLeft;
if (topLeft.Y > ControlRectangle.Bottom)
{
return(topLeft); // drawing would be below the screen
}
if (topLeft.Y > ControlRectangle.Top - ItemHeight)
{
// Draw the item itself
// Point tl = new Point((int)topLeft.X, (int)topLeft.Y);
var itemBox = new LegendBox();
_legendBoxes.Add(itemBox);
itemBox.Item = e.Item;
itemBox.Bounds = new Rectangle(0, (int)topLeft.Y, Width, ItemHeight);
itemBox.Indent = (int)topLeft.X / _indentation;
DrawPlusMinus(e.Graphics, ref tempTopLeft, itemBox);
int ih = ItemHeight;
if (e.Item.LegendSymbolMode == SymbolMode.Symbol)
{
Size s = e.Item.GetLegendSymbolSize();
if (s.Height > ih)
{
tempTopLeft.Y += 3;
}
}
if (e.Item.LegendSymbolMode == SymbolMode.Symbol || e.Item.LegendSymbolMode == SymbolMode.GroupSymbol)
{
DrawSymbol(e.Graphics, ref tempTopLeft, itemBox);
}
if (e.Item.LegendSymbolMode == SymbolMode.Checkbox)
{
DrawCheckBoxes(e.Graphics, ref tempTopLeft, itemBox);
}
int width = (int)e.Graphics.MeasureString(e.Item.LegendText, Font).Width;
int dY = 0;
if (e.Item.LegendSymbolMode == SymbolMode.Symbol)
{
Size s = e.Item.GetLegendSymbolSize();
if (s.Height > ih)
{
dY = (s.Height - ih) / 2;
}
tempTopLeft.Y += dY;
}
tempTopLeft.Y += (ih - Font.Height) / (float)2;
itemBox.Textbox = new Rectangle((int)tempTopLeft.X, (int)topLeft.Y + dY, width, ItemHeight);
if (itemBox.Item.IsSelected)
{
_selection.Add(itemBox.Item);
Rectangle innerBox = itemBox.Textbox;
innerBox.Inflate(-1, -1);
using (var b = HighlightBrush(innerBox))
{
e.Graphics.FillRectangle(b, innerBox);
}
SymbologyGlobal.DrawRoundedRectangle(e.Graphics, _highlightBorderPen, itemBox.Textbox);
e.Graphics.DrawString(e.Item.LegendText, Font, _selectionFontBrush, tempTopLeft);
}
else
{
e.Graphics.DrawString(e.Item.LegendText, Font, Brushes.Black, tempTopLeft);
}
}
int h = ItemHeight;
if (e.Item.LegendSymbolMode == SymbolMode.Symbol)
{
Size s = e.Item.GetLegendSymbolSize();
if (s.Height > h)
{
h = s.Height + 6;
}
}
topLeft.Y += h;
if (e.Item.IsExpanded)
{
topLeft.X += _indentation;
if (e.Item.LegendItems != null)
{
List <ILegendItem> items = e.Item.LegendItems.ToList();
if (e.Item is IGroup)
{
items.Reverse(); // reverse layers because of drawing order, don't bother reversing categories.
}
foreach (var item in items)
{
var args = new DrawLegendItemArgs(e.Graphics, item, e.ClipRectangle, topLeft);
topLeft = OnInitializeItem(args);
if (topLeft.Y > ControlRectangle.Bottom)
{
break;
}
}
}
topLeft.X -= _indentation;
}
return(topLeft);
}
/// <summary>
/// This supplies the basic drawing for this one element where the graphics object has been transformed
/// based on the position of this item.
/// </summary>
/// <param name="e">A PaintEventArgs that contains the Graphics object needed for drawing.</param>
protected virtual void OnDraw(PaintEventArgs e)
{
//System.Diagnostics.Debug.WriteLine("top: " + this.Top.ToString());
int left = 1;
Pen border = Pens.White;
Pen innerBorder = Pens.White;
Brush fill = Brushes.White;
Pen dots = new Pen(Color.Black);
bool specialDrawing = false;
dots.DashStyle = DashStyle.Dot;
if (_isHighlighted && _isSelected == false)
{
border = new Pen(Color.FromArgb(216, 240, 250));
innerBorder = new Pen(Color.FromArgb(248, 252, 254));
fill = new LinearGradientBrush(ClientRectangle, Color.FromArgb(245, 250, 253), Color.FromArgb(232, 245, 253), LinearGradientMode.Vertical);
specialDrawing = true;
}
if (_isSelected && _isHighlighted == false)
{
border = new Pen(Color.FromArgb(153, 222, 253));
innerBorder = new Pen(Color.FromArgb(231, 245, 253));
fill = new LinearGradientBrush(ClientRectangle, Color.FromArgb(241, 248, 253), Color.FromArgb(213, 239, 252), LinearGradientMode.Vertical);
specialDrawing = true;
}
if (_isSelected && _isHighlighted)
{
border = new Pen(Color.FromArgb(182, 230, 251));
innerBorder = new Pen(Color.FromArgb(242, 249, 253));
fill = new LinearGradientBrush(ClientRectangle, Color.FromArgb(232, 246, 253), Color.FromArgb(196, 232, 250), LinearGradientMode.Vertical);
specialDrawing = true;
}
e.Graphics.FillRectangle(fill, new Rectangle(1, 1, Width - 2, Height - 2));
SymbologyGlobal.DrawRoundedRectangle(e.Graphics, innerBorder, new Rectangle(2, 2, Width - 4, Height - 4));
SymbologyGlobal.DrawRoundedRectangle(e.Graphics, border, new Rectangle(1, 1, Width - 2, Height - 2));
if (_isOutlined)
{
e.Graphics.DrawRectangle(dots, new Rectangle(2, 2, Width - 4, Height - 4));
}
if (_showImage)
{
if (Height > 20)
{
e.Graphics.DrawImage(Image, new Rectangle(1, 1, Height - 2, Height - 2));
}
else
{
e.Graphics.DrawImage(Image, new Rectangle(1, 1, Image.Width, Image.Height));
}
left = Height + 2;
}
Brush b = new SolidBrush(_fontColor);
e.Graphics.DrawString(Text, Font, b, new PointF(left, 1f));
b.Dispose();
if (specialDrawing)
{
if (border != null)
{
border.Dispose();
}
if (innerBorder != null)
{
innerBorder.Dispose();
}
if (fill != null)
{
fill.Dispose();
}
if (dots != null)
{
dots.Dispose();
}
}
//base.OnPaint(e);
}