htmltreenode.java

一个使用struts+hibernate+spring开发的完的网站源代码。

            translateChildrenPath(pathUpdateIndex, 0, offset);
        }
    }


    public void setExpanded(boolean expanded)
    {
        if (this.expanded == expanded)
        {
            // no change
            return;
        }
        this.expanded = expanded;

        if (expanded)
        {
            FacesContext context = FacesContext.getCurrentInstance();
            TreeModel model = getTreeModel(context);
            int childCount = model.getChildCount(getUserObject());

            for (int i = 0; i < childCount; i++)
            {
                Object child = model.getChild(getUserObject(), i);
                HtmlTreeNode node = createNode(model, child, childCount, i, context);
                getChildren().add(node);
            }
            layout[layout.length - 1] -= OFFSET;
        } else
        {
            if (clearSelection())
            {
                setSelected(true);
            }
            getChildren().clear();
            layout[layout.length - 1] += OFFSET;
        }

    }


    private HtmlTreeNode createNode(TreeModel model, Object child, int childCount, int index, FacesContext context)
    {
        HtmlTreeNode node = (HtmlTreeNode) context.getApplication().createComponent(HtmlTreeNode.COMPONENT_TYPE);
        String id = getTree().createUniqueId(context);
        node.setId(id);

        node.setPath(getPath().pathByAddingChild(child));
        node.setUserObject(child);
        int state = CHILD;
        int childChildCount = model.getChildCount(child);

        if (childChildCount == 0)
        {

            if (childCount > 1)
            {
                if (index == 0)
                {
                    state = CHILD;
                } else if (index == childCount - 1)
                {
                    state = CHILD_LAST;
                }
            } else
            {
                state = CHILD_LAST;
            }
        } else
        {
            if (childCount > 1)
            {
                if (index == 0)
                {
                    state = CLOSED;
                } else if (index == childCount - 1)
                {
                    state = CLOSED_LAST;
                } else
                {
                    state = CLOSED;
                }
            } else
            {
                state = CLOSED_LAST;
            }

        }
        node.setLayout(layout, state);

        return node;
    }


    public void toggleExpanded()
    {
        setExpanded(!expanded);
    }


    public boolean isSelected()
    {
        return selected;
    }


    public void setSelected(boolean selected)
    {
        if (selected)
        {
            getTree().getRootNode().clearSelection();
        }
        this.selected = selected;
        getTree().selectionChanged(this);
    }


    public void toggleSelected()
    {
        setSelected(!selected);
    }


    private boolean clearSelection()
    {
        if (isSelected())
        {
            selected = false;
            return true;
        }
        for (Iterator iterator = getChildren().iterator(); iterator.hasNext();)
        {
            HtmlTreeNode node = (HtmlTreeNode) iterator.next();
            if (node.clearSelection())
            {
                return true;
            }
        }
        return false;
    }


    public int[] getLayout()
    {
        return layout;
    }


    public void setLayout(int[] layout)
    {
        this.layout = layout;
    }


    public void setLayout(int[] parentLayout, int layout)
    {
        this.layout = new int[parentLayout.length + 1];
        this.layout[parentLayout.length] = layout;

        for (int i = 0; i < parentLayout.length; i++)
        {
            int state = parentLayout[i];
            if (state == OPEN || state == OPEN_FIRST || state == CLOSED || state == CLOSED_FIRST || state == CHILD || state == CHILD_FIRST || state == LINE)
            {
                this.layout[i] = LINE;
            } else
            {
                this.layout[i] = EMPTY;
            }
        }
    }


    public HtmlTreeImageCommandLink getExpandCollapseCommand(FacesContext context)
    {
        HtmlTreeImageCommandLink command = (HtmlTreeImageCommandLink) getFacet(EXPAND_COLLAPSE_FACET);

        if (command == null)
        {
            command = (HtmlTreeImageCommandLink) context.getApplication().createComponent(HtmlTreeImageCommandLink.COMPONENT_TYPE);
            String id = getTree().createUniqueId(context);
            command.setId(id);
            getFacets().put(EXPAND_COLLAPSE_FACET, command);
        }
        return command;
    }


    public Object saveState(FacesContext context)
    {
        Object values[] = new Object[5];
        values[0] = super.saveState(context);
        values[1] = Boolean.valueOf(expanded);
        values[2] = layout;
        values[3] = translatePath(getPath(), getTreeModel(context));
        values[4] = Boolean.valueOf(selected);
        return ((Object) (values));
    }


    public void restoreState(FacesContext context, Object state)
    {
        Object values[] = (Object[]) state;
        super.restoreState(context, values[0]);
        expanded = ((Boolean) values[1]).booleanValue();
        layout = (int[]) values[2];
        translatedPath = (int[]) values[3];
        selected = ((Boolean) values[4]).booleanValue();
    }


    protected static int[] translatePath(TreePath treePath, TreeModel model)
    {
        Object[] path = treePath.getPath();
        int[] translated = new int[path.length - 1];

        Object parent = path[0];

        for (int i = 1; i < path.length; i++)
        {
            Object element = path[i];
            translated[i - 1] = model.getIndexOfChild(parent, element);
            parent = element;
        }
        return translated;
    }


    protected static TreePath translatePath(int[] path, TreeModel model)
    {
        Object[] translated = new Object[path.length + 1];
        Object parent = model.getRoot();

        translated[0] = parent;

        for (int i = 0; i < path.length; i++)
        {
            int index = path[i];
            translated[i + 1] = model.getChild(parent, index);
            parent = translated[i + 1];
        }
        return new TreePath(translated);
    }


    protected TreeModel getTreeModel(FacesContext context)
    {
        return getTree().getModel(context);
    }


    protected HtmlTree getTree()
    {
        if (getParent() instanceof HtmlTree)
        {
            return (HtmlTree) getParent();
        }
        return ((HtmlTreeNode) getParent()).getTree();
    }


    public boolean isLeaf(FacesContext context)
    {
        return getTreeModel(context).isLeaf(getUserObject());
    }


    public void expandPath(int[] translatedPath, int current)
    {
        if (current >= translatedPath.length)
        {
            return;
        }

        HtmlTreeNode child = (HtmlTreeNode) getChildren().get(translatedPath[current]);

        if (!child.isExpanded())
        {
            child.setExpanded(true);
        }

        child.expandPath(translatedPath, current + 1);
    }


    public void restoreItemState(HtmlTreeNode node)
    {
        setExpanded(node.isExpanded());
        selected = node.isSelected();
        List children = getChildren();
        List otherChildren = node.getChildren();
        for (int i = 0; i < children.size(); i++)
        {
            HtmlTreeNode child = (HtmlTreeNode) children.get(i);
            child.restoreItemState((HtmlTreeNode) otherChildren.get(i));
        }
    }
}