private void DrawGradient()
{
Graphics graphics = Graphics.FromImage(gradientPanelBackBuffer);
graphics.Clear(gradientPanel.BackColor);
if (gradient != null)
{
Gradient.FillCheckerboardRectangle(graphics, gradientRectangle, 8);
gradient.Draw(graphics, gradientRectangle, 0.0, 1.0, Gradient.Direction.Horizontal);
graphics.DrawRectangle(Pens.Black, new Rectangle(gradientRectangle.Left - 1, gradientRectangle.Top - 1, gradientRectangle.Width + 2, gradientRectangle.Height + 1));
DrawColorEntryMarkers();
}
graphics.Dispose();
}
protected override void OnDrawItem(DrawItemEventArgs ea)
{
if (ea.Index != -1 && Items.Count > 0)
{
Gradient item = (Gradient)Items[ea.Index];
Bitmap backBufferBitmap = new Bitmap(ea.Bounds.Width, ea.Bounds.Height);
Graphics backBufferGraphics = Graphics.FromImage(backBufferBitmap);
backBufferGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
Brush b = new SolidBrush(BackColor);
ea.Graphics.FillRectangle(b, ea.Bounds);
b.Dispose();
ea.DrawBackground();
Rectangle rect = new Rectangle(4, 4, backBufferBitmap.Width - this.NameWidth - 4, backBufferBitmap.Height - 8);
Gradient.FillCheckerboardRectangle(backBufferGraphics, rect, 3);
item.Draw(backBufferGraphics, rect, 0, 1, Gradient.Direction.Horizontal);
backBufferGraphics.DrawRectangle(Pens.Black, new Rectangle(3, 3, backBufferBitmap.Width - this.NameWidth - 3, backBufferBitmap.Height - 7));
Color textColor;
if ((ea.State & DrawItemState.Selected).Equals(DrawItemState.Selected))
{
textColor = SystemColors.HighlightText;
}
else
{
textColor = this.ForeColor;
}
Size textSize = TextRenderer.MeasureText(backBufferGraphics, item.Name, this.Font);
Point textLocation = new Point(backBufferBitmap.Width - this.NameWidth + this.NamePadding, (ea.Bounds.Height - textSize.Height) / 2);
TextRenderer.DrawText(backBufferGraphics, item.Name, this.Font, textLocation, textColor);
ea.Graphics.DrawImage(backBufferBitmap, ea.Bounds.Location);
backBufferBitmap.Dispose();
backBufferGraphics.Dispose();
ea.DrawFocusRectangle();
base.OnDrawItem(ea);
}
}
// This method paints a graphical representation of the
// selected value of the LightShpae property.
public override void PaintValue(PaintValueEventArgs e)
{
Gradient gradient = (Gradient)e.Value;
gradient.Draw(e.Graphics, e.Bounds, 0, 1, Gradient.Direction.Horizontal);
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
gradient.Draw(this.CreateGraphics(), this.Bounds, 0, 1, Gradient.Direction.Horizontal);
}
