public void UpdateMenu(IWindowMenuItem menuItem)
{
var mii = new MENUITEMINFO(null)
{
fMask = MenuItemInfoMember.MIIM_CHECKMARKS |
MenuItemInfoMember.MIIM_DATA |
MenuItemInfoMember.MIIM_FTYPE |
MenuItemInfoMember.MIIM_ID |
MenuItemInfoMember.MIIM_STATE |
MenuItemInfoMember.MIIM_STRING
};
PInvokeUtils.Try(() => SystemMenuAPI.GetMenuItemInfo(_hSysMenu, menuItem.Id, false, ref mii));
if (menuItem.Enabled)
{
mii.fState &= (~MenuItemState.MFS_DISABLED); // clear "disabled" flag
}
else
{
mii.fState |= MenuItemState.MFS_DISABLED; // set "disabled" flag
}
if (menuItem.Checked)
{
mii.fState |= MenuItemState.MFS_CHECKED; // set "checked" flag
}
else
{
mii.fState &= (~MenuItemState.MFS_CHECKED); // clear "checked" flag
}
mii.fMask = MenuItemInfoMember.MIIM_STATE;
PInvokeUtils.Try(() => SystemMenuAPI.SetMenuItemInfo(_hSysMenu, menuItem.Id, false, ref mii));
// TODO: From my observations, this function always returns false, even though it appears to succeed.
// Am I using it incorrectly?
SystemMenuAPI.DrawMenuBar(_hSysMenu);
}
public void InsertSeparator(uint position)
{
PInvokeUtils.Try(() => SystemMenuAPI.InsertMenu(_hSysMenu, position, MenuFlags.MF_BYPOSITION | MenuFlags.MF_SEPARATOR, 0, string.Empty));
}
public void InsertMenu(uint position, IWindowMenuItem menuItem)
{
PInvokeUtils.Try(() => SystemMenuAPI.InsertMenu(_hSysMenu, position, MenuFlags.MF_BYPOSITION | MenuFlags.MF_STRING, menuItem.Id, menuItem.Text));
_items.Add(menuItem);
}
public void AppendSeparator()
{
PInvokeUtils.Try(() => SystemMenuAPI.AppendMenu(_hSysMenu, MenuFlags.MF_SEPARATOR, 0, string.Empty));
}
public void AppendMenu(IWindowMenuItem menuItem)
{
PInvokeUtils.Try(() => SystemMenuAPI.AppendMenu(_hSysMenu, MenuFlags.MF_STRING, menuItem.Id, menuItem.Text));
_items.Add(menuItem);
}
internal WindowMenu(Form form)
{
_hSysMenu = SystemMenuAPI.GetSystemMenu(form.Handle, false);
new WndProcHook(form).WndProcMessage += OnWndProcMessage;
}
