Java BlockLink.connect方法代码示例

import edu.mit.blocks.codeblocks.BlockLink; //导入方法依赖的package包/类
public void actionPerformed(ActionEvent e) {
    if (childBlock.getLocation().distance(focusPoint) < 75) {
        //if parent block exist, then preform automatic linking
        childBlock.setLocation(focusPoint);
        if (parentBlock != null && parentBlock.getBlockID() != null && !parentBlock.getBlockID().equals(Block.NULL)) {
            BlockLink link = LinkFinderUtil.connectBlocks(workspace, workspace.getEnv().getBlock(childBlock.getBlockID()), workspace.getEnv().getBlock(parentBlock.getBlockID()));
            if (link == null) {
                dropBlock(childBlock);
                childBlock.repaintBlock();
                childBlock.repaint();
            } else {
                // drop and link the new block
                link.connect();
                dropBlock(childBlock);

                workspace.notifyListeners(new WorkspaceEvent(
                        workspace,
                        workspace.getEnv().getRenderableBlock(link.getPlugBlockID()).getParentWidget(),
                        link, WorkspaceEvent.BLOCKS_CONNECTED));
                workspace.getEnv().getRenderableBlock(link.getSocketBlockID()).moveConnectedBlocks();
                workspace.getEnv().getRenderableBlock(link.getSocketBlockID()).repaintBlock();
                workspace.getEnv().getRenderableBlock(link.getSocketBlockID()).repaint();
            }
        } else {
            dropBlock(childBlock);
            childBlock.repaintBlock();
            childBlock.repaint();
        }

        //stop the timer
        timer.stop();
        if (workspace.getEnv().getBlock(childBlock.getBlockID()).getGenusName().equals("number")) {
            childBlock.switchToLabelEditingMode(false);
        } else {
            childBlock.switchToLabelEditingMode(true);
        }

        //TODO: check if focumanager's before parent is same as
        //the parent we have here and check if new focusblock is child block
        PageChangeEventManager.notifyListeners();
    } else {
        //childBlock.setLocation(focusPoint);
        // TODO: This needs to change if the parent block doesn't have any more sockets for children
        // Need to adjust focusPoint somehow.
        childBlock.setLocation(
                (int) (focusPoint.getX() * 0.67) + (int) (childBlock.getX() * 0.34),
                (int) (focusPoint.getY() * 0.67) + (int) (childBlock.getY() * 0.34));

    }
}
 

import edu.mit.blocks.codeblocks.BlockLink; //导入方法依赖的package包/类
public void mouseReleased(MouseEvent e) {
	if (SwingUtilities.isLeftMouseButton(e)) {
		if (!pickedUp) {
			throw new RuntimeException("dropping without prior dragging?");
		}
		dragHandler.mouseReleased(e);

		// if the block was dragged before...then
		if (dragging) {
			BlockLink link = getNearbyLink(); // look for nearby link
												// opportunities
			WorkspaceWidget widget = null;

			// if a suitable link wasn't found, just drop the block
			if (link == null) {
				widget = lastDragWidget;
				stopDragging(this, widget);
			} // otherwise, if a link WAS found...
			else {

				/*
				 * Make sure that no matter who's connecting to whom, the
				 * block that's being dragged gets dropped on the parent
				 * widget of the block that's already on the canvas.
				 */
				if (blockID.equals(link.getSocketBlockID())) {
					// dragged block is the socket block, so take plug's
					// parent.
					widget = workspace.getEnv()
							.getRenderableBlock(link.getPlugBlockID())
							.getParentWidget();
				} else {
					// dragged block is the plug block, so take the socket
					// block's parent.
					widget = workspace.getEnv()
							.getRenderableBlock(link.getSocketBlockID())
							.getParentWidget();
				}

				// drop the block and connect its link
				stopDragging(this, widget);
				link.connect();
				workspace.notifyListeners(new WorkspaceEvent(workspace,
						widget, link, WorkspaceEvent.BLOCKS_CONNECTED));
				workspace.getEnv()
						.getRenderableBlock(link.getSocketBlockID())
						.moveConnectedBlocks();
			}

			// set the locations for X and Y based on zoom at 1.0
			this.unzoomedX = this.calculateUnzoomedX(this.getX());
			this.unzoomedY = this.calculateUnzoomedY(this.getY());

			workspace.notifyListeners(new WorkspaceEvent(workspace, widget,
					link, WorkspaceEvent.BLOCK_MOVED, true));
			if (widget instanceof MiniMap) {
				workspace.getMiniMap().animateAutoCenter(this);
			}
		}
	}
	pickedUp = false;
	if (e.isPopupTrigger() || SwingUtilities.isRightMouseButton(e)
			|| e.isControlDown()) {
		// add context menu at right click location to provide functionality
		// for adding new comments and removing comments
		PopupMenu popup = ContextMenu.getContextMenuFor(this);
		add(popup);
		popup.show(this, e.getX(), e.getY());
	}
	workspace.getMiniMap().repaint();
}