/**
   * @param childBlock
   * @param widget
   * @requires widget != null
   * @modifies
   * @effects Does nothing if: childBlock is invalid (null) Otherwise, remove childBlock from it's
   *     parent block if the childBlock has a parent. If it does not have a parent, do nothing.
   */
  private void disconnectBlock(Block childBlock, WorkspaceWidget widget) {
    if (childBlock == null || invalidBlockID(childBlock.getBlockID())) {
      return;
    }
    BlockConnector childPlug = BlockLinkChecker.getPlugEquivalent(childBlock);
    if (childPlug == null || !childPlug.hasBlock() || isNullBlockInstance(childPlug.getBlockID())) {
      return;
    }
    Block parentBlock = workspace.getEnv().getBlock(childPlug.getBlockID());
    BlockConnector parentSocket = parentBlock.getConnectorTo(childBlock.getBlockID());
    if (parentSocket == null) {
      return;
    }
    // disconector if child connector exists and has a block connected to it
    BlockLink link =
        BlockLink.getBlockLink(workspace, childBlock, parentBlock, childPlug, parentSocket);
    if (link == null) {
      return;
    }

    link.disconnect();

    RenderableBlock parentRenderable =
        workspace.getEnv().getRenderableBlock(parentBlock.getBlockID());
    if (parentRenderable == null) {
      throw new RuntimeException(
          "INCONSISTANCY VIOLATION: "
              + "parent block was valid, non-null, and existed.\n\tBut yet, when we get it's renderable"
              + "representation, we recieve a null instance.\n\tIf the Block instance of an ID is non-null"
              + "then its graphical RenderableBlock should be non-null as well");
    }
    parentRenderable.blockDisconnected(parentSocket);
    workspace.notifyListeners(
        new WorkspaceEvent(workspace, widget, link, WorkspaceEvent.BLOCKS_DISCONNECTED));
  }
Beispiel #2
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  public static RenderableBlock makeRenderable(
      Workspace workspace, BlockNode node, WorkspaceWidget widget) {
    String genusName = node.getGenusName(); // genusName may not be null
    RenderableBlock renderable = BlockUtilities.getBlock(workspace, genusName, node.getLabel());
    if (renderable == null) {
      throw new RuntimeException("No children block exists for this genus: " + genusName);
    }
    Block block = Block.getBlock(renderable.getBlockID()); // assume not null
    widget.blockDropped(renderable);
    for (int i = 0; i < node.getChildren().size(); i++) {
      BlockConnector socket = block.getSocketAt(i);
      BlockNode child = node.getChildren().get(i);
      RenderableBlock childRenderable = makeRenderable(workspace, child, widget);
      Block childBlock = Block.getBlock(childRenderable.getBlockID());

      // link blocks
      BlockLink link;
      if (childBlock.hasPlug()) {
        link = BlockLinkChecker.canLink(workspace, block, childBlock, socket, childBlock.getPlug());
      } else if (childBlock.hasBeforeConnector()) {
        link =
            BlockLinkChecker.canLink(
                workspace, block, childBlock, socket, childBlock.getBeforeConnector());
      } else {
        link = null;
      } // assume link is not null
      link.connect();
      workspace.notifyListeners(
          new WorkspaceEvent(
              workspace,
              RenderableBlock.getRenderableBlock(link.getPlugBlockID()).getParentWidget(),
              link,
              WorkspaceEvent.BLOCKS_CONNECTED));
    }
    if (node.getAfterNode() != null) {
      BlockConnector socket = block.getAfterConnector(); // assume has after connector
      BlockNode child = node.getAfterNode();
      RenderableBlock childRenderable = makeRenderable(workspace, child, widget);
      Block childBlock = Block.getBlock(childRenderable.getBlockID());

      // link blocks
      BlockLink link;
      if (childBlock.hasPlug()) {
        link = BlockLinkChecker.canLink(workspace, block, childBlock, socket, childBlock.getPlug());
      } else if (childBlock.hasBeforeConnector()) {
        link =
            BlockLinkChecker.canLink(
                workspace, block, childBlock, socket, childBlock.getBeforeConnector());
      } else {
        link = null;
      } // assume link is not null
      link.connect();
      workspace.notifyListeners(
          new WorkspaceEvent(
              workspace,
              RenderableBlock.getRenderableBlock(link.getPlugBlockID()).getParentWidget(),
              link,
              WorkspaceEvent.BLOCKS_CONNECTED));
    }
    return renderable;
  }
  /**
   * @requires the current block with focus must exist with non-null ID in a non-null widget with a
   *     non-null parent
   * @modifies the current block with focus
   * @effects removes the current block with focus and children from the GUI and destroys the link
   *     between the block with focus and it's parent block if one exist and children blocks if it
   *     has childrens.
   */
  private void deleteBlockAndChildren() {
    //		====================>>>>>>>>>>>>>>>>>>>>>>>>>
    //		====================focus coming in>>>>>>>>>>TODO
    //		====================>>>>>>>>>>>>>>>>>>>>>>>>>

    // Do not delete null block references.  Otherwise, get Block and RenderableBlock instances.
    if (isNullBlockInstance(focusManager.getFocusBlockID())) {
      throw new RuntimeException("TypeBlockManager: deleting a null block references.");
    }
    Block block = workspace.getEnv().getBlock(focusManager.getFocusBlockID());
    RenderableBlock renderable = workspace.getEnv().getRenderableBlock(block.getBlockID());

    // get workspace widget associated with current focus
    WorkspaceWidget widget = renderable.getParentWidget();
    // do not delete block instances in null widgets
    if (widget == null) {
      throw new RuntimeException("TypeBlockManager: do not delete blocks with no parent widget.");
      // return;
    }
    // get parent container of this graphical representation
    Container container = renderable.getParent();
    // do not delete block instances in null parents
    if (container == null) {
      throw new RuntimeException(
          "TypeBlockManager: do not delete blocks with no parent container.");
      // return;
    }
    // get the Block's location on the canvas
    Point location =
        SwingUtilities.convertPoint(renderable, new Point(0, 0), this.blockCanvas.getCanvas());

    // for every valid and active connection, disconnect it.
    Long parentID = null;
    if (validConnection(block.getPlug())) {
      parentID = block.getPlugBlockID();
      this.disconnectBlock(block, widget);
      if (validConnection(block.getAfterConnector())) {
        disconnectBlock(workspace.getEnv().getBlock(block.getAfterBlockID()), widget);
      }
    } else if (validConnection(block.getBeforeConnector())) {
      parentID = block.getBeforeBlockID();
      BlockConnector parentConnectorToBlock =
          workspace.getEnv().getBlock(parentID).getConnectorTo(block.getBlockID());
      this.disconnectBlock(block, widget);
      if (validConnection(block.getAfterConnector())) {
        Long afterBlockID = block.getAfterBlockID();
        disconnectBlock(workspace.getEnv().getBlock(afterBlockID), widget);
        if (parentID != null) {
          BlockLink link =
              BlockLinkChecker.canLink(
                  workspace,
                  workspace.getEnv().getBlock(parentID),
                  workspace.getEnv().getBlock(afterBlockID),
                  parentConnectorToBlock,
                  workspace.getEnv().getBlock(afterBlockID).getBeforeConnector());
          if (link != null) {
            link.connect();
            workspace.notifyListeners(
                new WorkspaceEvent(
                    workspace,
                    workspace.getEnv().getRenderableBlock(link.getPlugBlockID()).getParentWidget(),
                    link,
                    WorkspaceEvent.BLOCKS_CONNECTED));
            workspace.getEnv().getRenderableBlock(link.getPlugBlockID()).repaintBlock();
            workspace.getEnv().getRenderableBlock(link.getPlugBlockID()).repaint();
            workspace.getEnv().getRenderableBlock(link.getPlugBlockID()).moveConnectedBlocks();
            workspace.getEnv().getRenderableBlock(link.getSocketBlockID()).repaintBlock();
            workspace.getEnv().getRenderableBlock(link.getSocketBlockID()).repaint();
          }
        }
      }
    } else if (validConnection(block.getAfterConnector())) {
      parentID = block.getAfterBlockID();
    }

    // remove form widget and container
    this.removeChildrenBlock(renderable, widget, container);

    //		<<<<<<<<<<<<<<<<<<<<<<<<<<==========================
    //		<<<<<<<<<<<<<<<<<<<<<<<<<<focus changing, coming out TODO
    //		<<<<<<<<<<<<<<<<<<<<<<<<<<==========================
    // If the deleted block had a parent, give the parent the focus,
    // Otherwise, give the focus to the canvas (NOT BLOCK CANVAS)
    if (invalidBlockID(parentID)) {
      this.focusManager.setFocus(location, Block.NULL);
      this.blockCanvas.getCanvas().requestFocus();
      return;
    } else {
      this.focusManager.setFocus(parentID);
      this.blockCanvas.getCanvas().requestFocus();
      return;
    }
  }