Package eu.essilab.lablib.checkboxtree

Interface CheckboxTreeCellRenderer

All Superinterfaces:

TreeCellRenderer

All Known Implementing Classes:

DefaultCheckboxTreeCellRenderer, RadioButtonTree

public interface CheckboxTreeCellRenderer
extends TreeCellRenderer

The renderer for a cell in a CheckboxTree.

Author:

bigagli

Method Summary

Modifier and Type	Method	Description
Component	getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus)	This method is redeclared just to underline that the implementor has to properly display the checking/graying state of value.
boolean	isOnHotspot(int x, int y)	Returns whether the specified relative coordinates insist on the intended checkbox control.

Method Details

getTreeCellRendererComponent

Component getTreeCellRendererComponent(JTree tree,
 Object value,
 boolean selected,
 boolean expanded,
 boolean leaf,
 int row,
 boolean hasFocus)

This method is redeclared just to underline that the implementor has to properly display the checking/graying state of value. This should go in the method parameters, but would imply changes to Swing classes that were considered unpractical. For example in DefaultCheckboxTreeCellRenderer the following code is used to get the checking/graying states:

 TreeCheckingModel checkingModel = ((CheckboxTree) tree).getCheckingModel();
 
 TreePath path = tree.getPathForRow(row);
 
 boolean enabled = checkingModel.isPathEnabled(path);
 
 boolean checked = checkingModel.isPathChecked(path);
 
 boolean greyed = checkingModel.isPathGreyed(path);
 

You could use a QuadristateCheckbox to properly renderer the states (as in DefaultCheckboxTreeCellRenderer).

Specified by:

getTreeCellRendererComponent in interface TreeCellRenderer

See Also:

• TreeCellRenderer.getTreeCellRendererComponent(javax.swing.JTree, java.lang.Object, boolean, boolean, boolean, int, boolean)

isOnHotspot

boolean isOnHotspot(int x,
 int y)

Returns whether the specified relative coordinates insist on the intended checkbox control. It is used by the CheckboxTree mouse listener to figure out whether to toggle a node or not.