在代码中创建块到块的连接

Question

我已经实现了一个上下文菜单处理程序，它将一个块添加到工作区。我试图在召唤上下文菜单的块和可能已连接到它的任何块（previousConnection）之间添加块。我正在拍摄的内容和我已经获得的代码以及它的作用......

SurfaceTexture

before after

Answer 1

     //create comment block and get the block that summoned the context menu
     var comment = workspace.newBlock('ta_comment');
     var block = Blockly.ContextMenu.currentBlock;

     //connect up comment block
     comment.previousConnection.connect(block.previousConnection.targetConnection);
     comment.nextConnection.connect(block.previousConnection);

     //init
     comment.initSvg();

     //render updated workspace
     workspace.render();