public void Insert(int index, ImageComboBoxItem item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
item.Host(Owner);
Owner.OldItems.Insert(index, item);
}
public int Add(ImageComboBoxItem item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
item.Host(Owner);
return(Owner.OldItems.Add(item));
}
public ImageComboBoxItemImageIndexer(ImageComboBoxItem owner)
{
_owner = owner;
}
public void Remove(ImageComboBoxItem item)
{
Owner.OldItems.Remove(item);
}
public int IndexOf(ImageComboBoxItem item)
{
return(Owner.OldItems.IndexOf(item));
}
public bool Contains(ImageComboBoxItem item)
{
return(Owner.OldItems.Contains(item));
}
private void RePaint()
{
ImageComboBoxItem item = _Owner.SelectedItem;
var rcClient = new NativeMethods.RECT();
NativeMethods.GetClientRect(Handle, ref rcClient);
bool rightToLeft = IsRightToLeft(Handle);
IntPtr handle = Handle;
IntPtr hdc = NativeMethods.GetDC(handle);
if (hdc == IntPtr.Zero)
{
return;
}
try
{
using (Graphics g = Graphics.FromHdc(hdc))
{
int itemSize = _Owner.ItemHeight;
var imageRect = new Rectangle(0, rcClient.Top + (rcClient.Bottom - itemSize) / 2, itemSize, itemSize);
var textRect = new Rectangle(0, 0, rcClient.Right - itemSize - 6, rcClient.Bottom);
if (rightToLeft)
{
imageRect.X = rcClient.Right - itemSize - 2;
textRect.X = 2;
}
else
{
imageRect.X = 2;
textRect.X = imageRect.Right + 2;
}
if (_Owner.Text.Length == 0)
{
DrawImage(g, imageRect, _Owner.DefaultImage, _Owner.DefaultImageList, 0, _Owner.Focused);
if (_Owner.Text.Length == 0 && !string.IsNullOrEmpty(_Owner.EmptyTextTip) && !_Owner.Focused)
{
TextFormatFlags format = TextFormatFlags.EndEllipsis | TextFormatFlags.VerticalCenter;
if (_Owner.RightToLeft == RightToLeft.Yes)
{
format |= (TextFormatFlags.RightToLeft | TextFormatFlags.Right);
}
TextRenderer.DrawText(g, _Owner.EmptyTextTip, _Owner.Font, textRect, _Owner.EmptyTextTipColor, format);
}
return;
}
if (_Owner.Text.Length > 0)
{
using (var brush = new SolidBrush(_Owner.BackColor))
{
g.FillRectangle(brush, imageRect);
}
}
if (_Owner.Items.Count == 0)
{
DrawImage(g, imageRect, _Owner.DefaultImage, _Owner.DefaultImageList, 0, _Owner.Focused);
return;
}
if (item == null)
{
return;
}
DrawImage(g, imageRect, item.Image, _Owner.ImageList, item.ImageIndexer.ActualIndex, _Owner.Focused);
}
} finally
{
NativeMethods.ReleaseDC(handle, hdc);
}
}
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);
}
}
