MenuItem(Menu parent, Menu menu, int style, int index) {
super(parent, checkStyle(style));
this.parent = parent;
this.menu = menu;
this.index = index;
if (menu != null) menu.cascade = this;
display.addMenuItem(this);
}
void setMenu(Menu menu, boolean dispose) {
/* Assign the new menu */
Menu oldMenu = this.menu;
if (oldMenu == menu) return;
if (oldMenu != null) oldMenu.cascade = null;
this.menu = menu;
/* Assign the new menu in the OS */
if ((OS.IsPPC || OS.IsSP) && parent.hwndCB != 0) {
if (OS.IsPPC) {
long /*int*/ hwndCB = parent.hwndCB;
long /*int*/ hMenu = menu == null ? 0 : menu.handle;
OS.SendMessage(hwndCB, OS.SHCMBM_SETSUBMENU, id, hMenu);
}
if (OS.IsSP) error(SWT.ERROR_CANNOT_SET_MENU);
} else {
long /*int*/ hMenu = parent.handle;
MENUITEMINFO info = new MENUITEMINFO();
info.cbSize = MENUITEMINFO.sizeof;
info.fMask = OS.MIIM_DATA;
int index = 0;
while (OS.GetMenuItemInfo(hMenu, index, true, info)) {
if (info.dwItemData == id) break;
index++;
}
if (info.dwItemData != id) return;
int cch = 128;
long /*int*/ hHeap = OS.GetProcessHeap();
int byteCount = cch * TCHAR.sizeof;
long /*int*/ pszText = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount);
info.fMask = OS.MIIM_STATE | OS.MIIM_ID | OS.MIIM_DATA;
/*
* Bug in Windows. When GetMenuItemInfo() is used to get the text,
* for an item that has a bitmap set using MIIM_BITMAP, the text is
* not returned. This means that when SetMenuItemInfo() is used to
* set the submenu and the current menu state, the text is lost.
* The fix is use MIIM_BITMAP and MIIM_STRING.
*/
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(4, 10)) {
info.fMask |= OS.MIIM_BITMAP | OS.MIIM_STRING;
} else {
info.fMask |= OS.MIIM_TYPE;
}
info.dwTypeData = pszText;
info.cch = cch;
boolean success = OS.GetMenuItemInfo(hMenu, index, true, info);
if (menu != null) {
menu.cascade = this;
info.fMask |= OS.MIIM_SUBMENU;
info.hSubMenu = menu.handle;
}
if (OS.IsWinCE) {
OS.RemoveMenu(hMenu, index, OS.MF_BYPOSITION);
/*
* On WinCE, InsertMenuItem() is not available. The fix is to
* use SetMenuItemInfo() but this call does not set the menu item
* state and submenu. The fix is to use InsertMenu() to insert
* the item, SetMenuItemInfo() to set the string and EnableMenuItem()
* and CheckMenuItem() to set the state.
*/
long /*int*/ uIDNewItem = id;
int uFlags = OS.MF_BYPOSITION;
if (menu != null) {
uFlags |= OS.MF_POPUP;
uIDNewItem = menu.handle;
}
TCHAR lpNewItem = new TCHAR(0, " ", true);
success = OS.InsertMenu(hMenu, index, uFlags, uIDNewItem, lpNewItem);
if (success) {
info.fMask = OS.MIIM_DATA | OS.MIIM_TYPE;
success = OS.SetMenuItemInfo(hMenu, index, true, info);
if ((info.fState & (OS.MFS_DISABLED | OS.MFS_GRAYED)) != 0) {
OS.EnableMenuItem(hMenu, index, OS.MF_BYPOSITION | OS.MF_GRAYED);
}
if ((info.fState & OS.MFS_CHECKED) != 0) {
OS.CheckMenuItem(hMenu, index, OS.MF_BYPOSITION | OS.MF_CHECKED);
}
}
} else {
if (dispose || oldMenu == null) {
success = OS.SetMenuItemInfo(hMenu, index, true, info);
} else {
/*
* Feature in Windows. When SetMenuItemInfo () is used to
* set a submenu and the menu item already has a submenu,
* Windows destroys the previous menu. This is undocumented
* and unexpected but not necessarily wrong. The fix is to
* remove the item with RemoveMenu () which does not destroy
* the submenu and then insert the item with InsertMenuItem ().
*/
OS.RemoveMenu(hMenu, index, OS.MF_BYPOSITION);
success = OS.InsertMenuItem(hMenu, index, true, info);
}
}
if (pszText != 0) OS.HeapFree(hHeap, 0, pszText);
if (!success) {
int error = OS.GetLastError();
SWT.error(
SWT.ERROR_CANNOT_SET_MENU,
null,
" [GetLastError=0x" + Integer.toHexString(error) + "]"); // $NON-NLS-1$ $NON-NLS-2$
}
}
parent.destroyAccelerators();
}