protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case NativeMethods.TB_SETBUTTONINFO:
NativeMethods.TBBUTTONINFO tbrInfo = default(NativeMethods.TBBUTTONINFO);
tbrInfo = (NativeMethods.TBBUTTONINFO)Marshal.PtrToStructure(m.LParam, typeof(NativeMethods.TBBUTTONINFO));
if ((tbrInfo.dwMask & NativeMethods.TBIF_SIZE) == NativeMethods.TBIF_SIZE)
{
// If the .net wrapper is trying to set the size, then prevent this
tbrInfo.dwMask = tbrInfo.dwMask ^ NativeMethods.TBIF_SIZE;
}
if ((tbrInfo.dwMask & NativeMethods.TBIF_STYLE) == NativeMethods.TBIF_STYLE)
{
if ((tbrInfo.fsStyle & NativeMethods.BTNS_AUTOSIZE) != NativeMethods.BTNS_AUTOSIZE)
{
// Make sure that the autosize style is set for all buttons, and doesn't
// get inadvertantly unset at any point by the .net wrapper
tbrInfo.fsStyle = (byte)(tbrInfo.fsStyle | NativeMethods.BTNS_AUTOSIZE);
}
}
Marshal.StructureToPtr(tbrInfo, m.LParam, true);
break;
}
base.WndProc(ref m);
}
public void SetWholeDropDown(ToolBarButton button)
{
if (button == null)
{
throw new ArgumentNullException("button");
}
if (!this.wholeDropDownButtons.Contains(button))
{
this.wholeDropDownButtons.Add(button);
if (!OsUtils.Windows())
{
// Append a down arrow as BTNS_WHOLEDROPDOWN is only supported under Windows
button.Text += " ▾";
}
}
NativeMethods.TBBUTTONINFO buttonInfo = default(NativeMethods.TBBUTTONINFO);
buttonInfo.cbSize = Marshal.SizeOf(buttonInfo);
buttonInfo.dwMask = NativeMethods.TBIF_STYLE | NativeMethods.TBIF_BYINDEX;
buttonInfo.fsStyle = NativeMethods.BTNS_WHOLEDROPDOWN | NativeMethods.BTNS_AUTOSIZE;
NativeMethods.SendMessage(this.Handle, NativeMethods.TB_SETBUTTONINFO, (IntPtr)this.Buttons.IndexOf(button), ref buttonInfo);
}