private void WmNotifyDropDown(ref Message m)
{
NativeMethods.NMTOOLBAR nmTB = (NativeMethods.NMTOOLBAR)m.GetLParam(typeof(NativeMethods.NMTOOLBAR));
ToolBoxButton tbb = buttons[nmTB.iItem];
Menu menu = tbb.DropDownMenu;
if (menu != null)
{
NativeMethods.RECT rc = new NativeMethods.RECT();
NativeMethods.TPMPARAMS tpm = new NativeMethods.TPMPARAMS();
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.TB_GETRECT, nmTB.iItem, ref rc);
if ((menu.GetType()).IsAssignableFrom(typeof(ContextMenu)))
{
((ContextMenu)menu).Show(this, new Point(rc.left, rc.bottom));
}
else
{
UnsafeNativeMethods.MapWindowPoints(new HandleRef(nmTB.hdr, nmTB.hdr.hwndFrom), NativeMethods.NullHandleRef, ref rc, 2);
tpm.rcExclude_left = rc.left;
tpm.rcExclude_top = rc.top;
tpm.rcExclude_right = rc.right;
tpm.rcExclude_bottom = rc.bottom;
UnsafeNativeMethods.TrackPopupMenuEx(new HandleRef(menu, menu.Handle), NativeMethods.TPM_LEFTALIGN | NativeMethods.TPM_LEFTBUTTON | NativeMethods.TPM_VERTICAL, rc.left, rc.bottom, new HandleRef(this, Handle), tpm);
}
}
}
private void TrackPopupMenu(int index)
{
while (index >= 0)
{
npopupIndex = -1;
cpopupIndex = index;
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.TB_PRESSBUTTON, index, 1);
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.TB_SETHOTITEM, index, IntPtr.Zero);
MenuBoxItem tbb = items[index];
tbb.mpressed = true;
//安装钩子
NativeMethods.WindowsHookProc hookProc = new NativeMethods.WindowsHookProc(MessageHook);
messageHookHandle = UnsafeNativeMethods.SetWindowsHookEx(NativeMethods.WH_MSGFILTER, hookProc, NativeMethods.NullHandleRef, UnsafeNativeMethods.GetCurrentThreadId());
if (messageHookHandle == IntPtr.Zero)
{
throw new Win32Exception("SetWindowsHookEx Failt");
}
Menu menu = tbb.DropDownMenu;
if (menu != null)
{
NativeMethods.RECT rc = new NativeMethods.RECT();
NativeMethods.TPMPARAMS tpm = new NativeMethods.TPMPARAMS();
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.TB_GETRECT, index, ref rc);
if ((menu.GetType()).IsAssignableFrom(typeof(ContextMenu)))
{
((ContextMenu)menu).Show(this, new Point(rc.left, rc.bottom));
}
}
base.Update();
//卸载钩子
UnsafeNativeMethods.UnhookWindowsHookEx(new HandleRef(null, messageHookHandle));
messageHookHandle = IntPtr.Zero;
if (menu != null)
{
UnsafeNativeMethods.SendMessage(new HandleRef(this, this.Handle), NativeMethods.TB_PRESSBUTTON, index, 0);
}
index = npopupIndex;
}
UnsafeNativeMethods.SendMessage(new HandleRef(this, this.Handle), NativeMethods.TB_SETHOTITEM, -1, IntPtr.Zero);
}
public static extern bool TrackPopupMenuEx(HandleRef hmenu, int fuFlags, int x, int y, HandleRef hwnd, NativeMethods.TPMPARAMS tpm);
