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Thread: JTree Selection Order Icons

  1. #1
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    Default JTree Selection Order Icons

    Hi,

    When a user selects a leaf, I want to display an icon(number picture) displaying the order in which this leaf is selected. i.e, if node has three leaves, if I click on the first, second and third, I want to display 1,2,3 with the node text. It the user deselects second node, I should automatically renumber the other selected nodes 1 and 2.

    I can use the TreeCellRenderer and set the icone for the selected leaf, but, at the same time how do I refresh the icons on the other leafs ?

    public Component getTreeCellRendererComponent(	JTree tr, 
    Object value, 
    boolean sel, 
    boolean expanded, 
    boolean leaf, 
    int row, 
    boolean focus) 
    {
    super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, focus); 
    /*if (sel) {
    this.setFont(getFont().deriveFont(Font.BOLD + Font.ITALIC));	
    }
    else { 
    this.setFont(getFont().deriveFont(Font.PLAIN));
    } 
    */
    if ((value != null) && (value instanceof DefaultMutableTreeNode)) 
    { 
    String sSpecial = ((NBTreeNode) value).sSpecial;
    boolean bSelected = ((NBTreeNode) value).bSelected;
    if(sSpecial != null)
    { 
    if (Integer.parseInt(sSpecial) >= 0 && bSelected == true)
    this.setIcon(Icons[Integer.parseInt(sSpecial)]);
    else
    this.setIcon(null);
    } 
     
    }
     
     
     
    return this; 
    }

    Any help is greatly appreciated.

    Thank you


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: JTree Selection Order Icons

    I deleted your duplicate post. Please keep questions to one thread at a time.

    When do you want to refresh the icons? Can't you just call repaint() on the whole JTree? Don't do that from the renderer or you'll have an infinite loop on your hands, but can't you do it from whatever event that should cause the refresh?
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