C++ LLView::getHandle方法代码示例

void LLFocusMgr::setKeyboardFocus(LLFocusableElement* new_focus, BOOL lock, BOOL keystrokes_only)
{
	// notes if keyboard focus is changed again (by onFocusLost/onFocusReceived)
    // making the rest of our processing unnecessary since it will already be
    // handled by the recursive call
	static bool focus_dirty;
	focus_dirty = false;

	if (mLockedView && 
		(new_focus == NULL || 
			(new_focus != mLockedView 
			&& dynamic_cast<LLView*>(new_focus)
			&& !dynamic_cast<LLView*>(new_focus)->hasAncestor(mLockedView))))
	{
		// don't allow focus to go to anything that is not the locked focus
		// or one of its descendants
		return;
	}

	mKeystrokesOnly = keystrokes_only;

	if( new_focus != mKeyboardFocus )
	{
		mLastKeyboardFocus = mKeyboardFocus;
		mKeyboardFocus = new_focus;

		// list of the focus and it's ancestors
		view_handle_list_t old_focus_list = mCachedKeyboardFocusList;
		view_handle_list_t new_focus_list;

		// walk up the tree to root and add all views to the new_focus_list
		for (LLView* ctrl = dynamic_cast<LLView*>(mKeyboardFocus); ctrl; ctrl = ctrl->getParent())
		{
			new_focus_list.push_back(ctrl->getHandle());
		}

		// remove all common ancestors since their focus is unchanged
		while (!new_focus_list.empty() &&
			   !old_focus_list.empty() &&
			   new_focus_list.back() == old_focus_list.back())
		{
			new_focus_list.pop_back();
			old_focus_list.pop_back();
		}

		// walk up the old focus branch calling onFocusLost
		// we bubble up the tree to release focus, and back down to add
		for (view_handle_list_t::iterator old_focus_iter = old_focus_list.begin();
			 old_focus_iter != old_focus_list.end() && !focus_dirty;
			 old_focus_iter++)
		{			
			LLView* old_focus_view = old_focus_iter->get();
			if (old_focus_view)
			{
				mCachedKeyboardFocusList.pop_front();
				old_focus_view->onFocusLost();
			}
		}

		// walk down the new focus branch calling onFocusReceived
		for (view_handle_list_t::reverse_iterator new_focus_riter = new_focus_list.rbegin();
			 new_focus_riter != new_focus_list.rend() && !focus_dirty;
			 new_focus_riter++)
		{			
			LLView* new_focus_view = new_focus_riter->get();
			if (new_focus_view)
			{
                mCachedKeyboardFocusList.push_front(new_focus_view->getHandle());
				new_focus_view->onFocusReceived();
			}
		}
		
		// if focus was changed as part of an onFocusLost or onFocusReceived call
		// stop iterating on current list since it is now invalid
		if (focus_dirty)
		{
			return;
		}

		// If we've got a default keyboard focus, and the caller is
		// releasing keyboard focus, move to the default.
		if (mDefaultKeyboardFocus != NULL && mKeyboardFocus == NULL)
		{
			mDefaultKeyboardFocus->setFocus(TRUE);
		}

		LLView* focus_subtree = dynamic_cast<LLView*>(mKeyboardFocus);
		LLView* viewp = dynamic_cast<LLView*>(mKeyboardFocus);
		// find root-most focus root
		while(viewp)
		{
			if (viewp->isFocusRoot())
			{
				focus_subtree = viewp;
			}
			viewp = viewp->getParent();
		}

		
		if (focus_subtree)
//.........这里部分代码省略.........