internal void NativeUpdateButtonAt(ToolBoxButton button, int index)
{
if (IsHandleCreated)
{
button.owner = this;
buttons[index] = button;
NativeMethods.TBBUTTONINFO btnINFO = button.GetTBBUTTONINFO(index);
UnsafeNativeMethods.SendMessage(new HandleRef(this, this.Handle), NativeMethods.TB_SETBUTTONINFO, index, ref btnINFO);
}
}
internal void NativeInsert(ToolBoxButton value, int index)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
if (IsHandleCreated)
{
if ((value.Appearance & TBBAppearance.Separator) != 0)
{
value.Width = 0;
}
else
{
Size edge = SystemInformation.Border3DSize;
Size size = Size.Empty;
if (!string.IsNullOrEmpty(value.Text))
{
using (Graphics g = Graphics.FromHwnd(Handle))
{
if (!string.IsNullOrEmpty(value.Text))
{
size = Size.Ceiling(g.MeasureString(value.Text, Font));
size.Width += 10;
}
}
}
if ((appearance & TBAppearance.List) != 0)//如果有List属性
{
value.Width = size.Width + ImageSize.Width + edge.Width * 3;
}
else
{
value.Width = size.Width > ImageSize.Width ? size.Width + edge.Width * 4 : ImageSize.Width + edge.Width * 4;
}
if ((value.Appearance & TBBAppearance.DropDown) != 0)
{
value.Width += 16;
}
if ((value.Appearance & TBBAppearance.WholeDropDown) != 0)
{
value.Width += 8;
}
}
NativeMethods.TBBUTTON tbbutton = value.GetTBBUTTON(index);
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.TB_INSERTBUTTON, index, ref tbbutton);
NativeMethods.TBBUTTONINFO tbbuttonINFO = value.GetTBBUTTONINFO(index);
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.TB_SETBUTTONINFO, index, ref tbbuttonINFO);
}
}