C++ (Cpp) TryGetPrevItem示例

示例#1

文件： cpp_symbol_tree.cpp 项目： AndrianDTR/codelite

void CppSymbolTree::AdvanceSelection(bool forward)
{
    wxTreeItemId item = GetSelection();
    if (!item.IsOk()) {
        return;
    }

    wxTreeItemId nextItem;
    if (forward) {
        nextItem = GetNextVisible(item);
        if ( !nextItem.IsOk() ) {
            // we could not get the next visible, try the next sibling
            nextItem = GetNextSibling(item);
            if ( !nextItem.IsOk() ) {
                // we are the last child... try the sibling of our parent
                wxTreeItemId parent = GetItemParent(item);
                if ( !parent.IsOk() ) {
                    return;
                }
                nextItem = GetNextSibling(parent);
            }
        }
        
    } else {
        nextItem = TryGetPrevItem(item);
    }

    if (nextItem.IsOk()) {
        SelectItem(nextItem);
    }
}

示例#2

文件： php_file_layout_tree.cpp 项目： 05storm26/codelite

void PHPFileLayoutTree::AdvanceSelection(bool forward)
{
    wxTreeItemId item = GetSelection();
    if(!item.IsOk()) {
        return;
    }

    wxTreeItemId nextItem;
    if(forward) {
        // Item is visible, scroll to it to make sure GetNextVisible() wont
        // fail
        ScrollTo(item);
        nextItem = GetNextVisible(item);
    } else {
        nextItem = TryGetPrevItem(item);
    }

    if(nextItem.IsOk()) {
        SelectItem(nextItem);
    }
}