This class is inserted in between cell renderers and the components that use them. It just exists to thwart the repaint() and invalidate() methods which would otherwise propagate up the tree when the renderer was configured. It's used by the implementations of JTable, JTree, and JList. For example, here's how CellRendererPane is used in the code the paints each row in a JList:
cellRendererPane = new CellRendererPane(); ... Component rendererComponent = renderer.getListCellRendererComponent(); renderer.configureListCellRenderer(dataModel.getElementAt(row), row); cellRendererPane.paintComponent(g, rendererComponent, this, x, y, w, h);
A renderer component must override isShowing() and unconditionally return true to work correctly because the Swing paint does nothing for components with isShowing false.
Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans package. Please see XMLEncoder.
This class is inserted in between cell renderers and the components that use them. It just exists to thwart the repaint() and invalidate() methods which would otherwise propagate up the tree when the renderer was configured. It's used by the implementations of JTable, JTree, and JList. For example, here's how CellRendererPane is used in the code the paints each row in a JList: cellRendererPane = new CellRendererPane(); ... Component rendererComponent = renderer.getListCellRendererComponent(); renderer.configureListCellRenderer(dataModel.getElementAt(row), row); cellRendererPane.paintComponent(g, rendererComponent, this, x, y, w, h); A renderer component must override isShowing() and unconditionally return true to work correctly because the Swing paint does nothing for components with isShowing false. Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans package. Please see XMLEncoder.
(->cell-renderer-pane)
Constructor.
Construct a CellRendererPane object.
Constructor. Construct a CellRendererPane object.
(get-accessible-context this)
Gets the AccessibleContext associated with this CellRendererPane. For CellRendererPanes, the AccessibleContext takes the form of an AccessibleCellRendererPane. A new AccessibleCellRendererPane instance is created if necessary.
returns: an AccessibleCellRendererPane that serves as the
AccessibleContext of this CellRendererPane - javax.accessibility.AccessibleContext
Gets the AccessibleContext associated with this CellRendererPane. For CellRendererPanes, the AccessibleContext takes the form of an AccessibleCellRendererPane. A new AccessibleCellRendererPane instance is created if necessary. returns: an AccessibleCellRendererPane that serves as the AccessibleContext of this CellRendererPane - `javax.accessibility.AccessibleContext`
(invalidate this)
Overridden to avoid propagating a invalidate up the tree when the cell renderer child is configured.
Overridden to avoid propagating a invalidate up the tree when the cell renderer child is configured.
(paint this g)
Shouldn't be called.
g - the specified Graphics window - java.awt.Graphics
Shouldn't be called. g - the specified Graphics window - `java.awt.Graphics`
(paint-component this g c p r)
(paint-component this g c p x y w h)
(paint-component this g c p x y w h should-validate)
Paint a cell renderer component c on graphics object g. Before the component is drawn it's reparented to this (if that's necessary), it's bounds are set to w,h and the graphics object is (effectively) translated to x,y. If it's a JComponent, double buffering is temporarily turned off. After the component is painted it's bounds are reset to -w, -h, 0, 0 so that, if it's the last renderer component painted, it will not start consuming input. The Container p is the component we're actually drawing on, typically it's equal to this.getParent(). If shouldValidate is true the component c will be validated before painted.
g - java.awt.Graphics
c - java.awt.Component
p - java.awt.Container
x - int
y - int
w - int
h - int
should-validate - boolean
Paint a cell renderer component c on graphics object g. Before the component is drawn it's reparented to this (if that's necessary), it's bounds are set to w,h and the graphics object is (effectively) translated to x,y. If it's a JComponent, double buffering is temporarily turned off. After the component is painted it's bounds are reset to -w, -h, 0, 0 so that, if it's the last renderer component painted, it will not start consuming input. The Container p is the component we're actually drawing on, typically it's equal to this.getParent(). If shouldValidate is true the component c will be validated before painted. g - `java.awt.Graphics` c - `java.awt.Component` p - `java.awt.Container` x - `int` y - `int` w - `int` h - `int` should-validate - `boolean`
(update this g)
Shouldn't be called.
g - the specified Graphics window - java.awt.Graphics
Shouldn't be called. g - the specified Graphics window - `java.awt.Graphics`
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