/**
* @return a collection of top level blocks within this page (blocks with no parents that and are
* the first block of each stack) or an empty collection if no blocks are found on this page.
*/
public Collection<RenderableBlock> getTopLevelBlocks() {
List<RenderableBlock> topBlocks = new ArrayList<RenderableBlock>();
for (RenderableBlock renderable : this.getBlocks()) {
Block block = workspace.getEnv().getBlock(renderable.getBlockID());
if (block.getPlug() == null
|| block.getPlugBlockID() == null
|| block.getPlugBlockID().equals(Block.NULL)) {
if (block.getBeforeConnector() == null
|| block.getBeforeBlockID() == null
|| block.getBeforeBlockID().equals(Block.NULL)) {
topBlocks.add(renderable);
continue;
}
}
}
return topBlocks;
}
/**
* @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;
}
}