private void DrawImage(Graphics g, Rectangle imageRect, Image image, ImageList imageList, int imageIndex, bool focus)
{
using (var brush = new SolidBrush(_Owner.BackColor))
{
g.FillRectangle(brush, imageRect);
}
if (image == null)
{
return;
}
using (var graphics = new InterpolationModeGraphics(g, InterpolationMode.HighQualityBicubic))
{
if (focus)
{
IntPtr hIcon = NativeMethods.ImageList_GetIcon(imageList.Handle, imageIndex, (int)NativeMethods.ImageListDrawFlags.ILD_SELECTED);
g.DrawIcon(Icon.FromHandle(hIcon), imageRect);
NativeMethods.DestroyIcon(hIcon);
}
else
{
g.DrawImage(image, imageRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel);
}
}
}
protected override void OnRenderItemImage(ToolStripItemImageRenderEventArgs e)
{
ToolStrip toolStrip = e.ToolStrip;
Graphics g = e.Graphics;
if (toolStrip is ToolStripDropDown && e.Item is ToolStripMenuItem)
{
bool bDrawLogo = NeedDrawLogo(toolStrip);
int offsetMargin = bDrawLogo ? OffsetMargin : 0;
ToolStripMenuItem item = (ToolStripMenuItem)e.Item;
if (item.Checked)
{
return;
}
Rectangle rect = e.ImageRectangle;
if (e.Item.RightToLeft == RightToLeft.Yes)
{
rect.X -= offsetMargin + 2;
}
else
{
rect.X += offsetMargin + 2;
}
using (InterpolationModeGraphics ig = new InterpolationModeGraphics(g))
{
ToolStripItemImageRenderEventArgs ne = new ToolStripItemImageRenderEventArgs(g, e.Item, e.Image, rect);
base.OnRenderItemImage(ne);
}
}
else
{
base.OnRenderItemImage(e);
}
}
protected override void OnDrawItem(DrawItemEventArgs e)
{
if (e.Index != -1)
{
ImageComboBoxItem item = Items[e.Index];
Graphics g = e.Graphics;
Rectangle bounds = e.Bounds;
int indentOffset = Indent * item.Level;
if ((e.State & DrawItemState.ComboBoxEdit) == DrawItemState.ComboBoxEdit)
{
indentOffset = 0;
}
int imageWidth = bounds.Height;
TextFormatFlags format = TextFormatFlags.VerticalCenter | TextFormatFlags.SingleLine | TextFormatFlags.WordBreak;
Rectangle imageRect = new Rectangle(bounds.Left + indentOffset + 2, bounds.Top, imageWidth, imageWidth);
Rectangle textRect = new Rectangle(imageRect.Right + 3, bounds.Y, bounds.Width - imageRect.Width - indentOffset - 5, bounds.Height);
var backRect = new Rectangle(textRect.X, textRect.Y + 1, textRect.Width, textRect.Height - 2);
backRect.Width = TextRenderer.MeasureText(item.Text, e.Font, textRect.Size, format).Width;
if (base.RightToLeft == RightToLeft.Yes)
{
imageRect.X = bounds.Right - imageRect.Right;
textRect.X = bounds.Right - textRect.Right;
backRect.X = textRect.Right - backRect.Width;
}
bool selected = ((e.State & DrawItemState.Selected) == DrawItemState.Selected);
Color backColor = selected ? SystemColors.Highlight : base.BackColor;
using (Brush backBrush = new SolidBrush(backColor))
{
g.FillRectangle(backBrush, backRect);
}
if (selected)
{
ControlPaint.DrawFocusRectangle(g, backRect);
}
Image image = item.Image;
if (image != null)
{
using (var graphics = new InterpolationModeGraphics(g, InterpolationMode.HighQualityBicubic))
{
if (selected)
{
IntPtr hIcon = NativeMethods.ImageList_GetIcon(ImageList.Handle, item.ImageIndexer.ActualIndex, (int)NativeMethods.ImageListDrawFlags.ILD_SELECTED);
g.DrawIcon(Icon.FromHandle(hIcon), imageRect);
NativeMethods.DestroyIcon(hIcon);
}
else
{
g.DrawImage(image, imageRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel);
}
}
}
TextRenderer.DrawText(g, item.Text, e.Font, textRect, base.ForeColor, format);
}
}