org.TagCloud

Class VerticalGrowJPanel

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JPanel

org.TagCloud.VerticalGrowJPanel

All Implemented Interfaces:

java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, javax.accessibility.Accessible, javax.swing.Scrollable

public class VerticalGrowJPanel
extends javax.swing.JPanel
implements javax.swing.Scrollable

A JPanel that grows vertically while maintaining the with of it's parent JScrollpane. This class was created to work in conjunction with a JScrollPane and FlowLayout. When adding components FlowLayout adds them to the right of each other until the width is filled up. Then FlowLayout adds a line. This class implements Scrollable as this allows us to trap the getPreferredSize and grow the JPanel vertically to show the components. FlowLayout stops horizontally because getScrollableTracksViewportWidth is defined to return true; This is based on the article found here: http://forums.sun.com/thread.jspa?forumID=57&threadID=5117549&start=7

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.JPanel

javax.swing.JPanel.AccessibleJPanel

Nested classes/interfaces inherited from class javax.swing.JComponent

javax.swing.JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

Fields inherited from class javax.swing.JComponent

accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Constructors

Constructor and Description
VerticalGrowJPanel()

Method Summary

Methods

Modifier and Type	Method and Description
java.awt.Dimension	getPreferredScrollableViewportSize() Source: http://forums.sun.com/thread.jspa?forumID=57&threadID=5117549&start=7
java.awt.Dimension	getPreferredSize() This method gets called by the JSCrollPane to figure out the size of the Viewport.
int	getScrollableBlockIncrement(java.awt.Rectangle visibleRect, int orientation, int direction) Source: http://forums.sun.com/thread.jspa?forumID=57&threadID=5117549&start=7
boolean	getScrollableTracksViewportHeight() Allows the JPanel to grow vertically beyond the height of the JScrollPane Viewport.
boolean	getScrollableTracksViewportWidth() Forces FlowLayout to stop growing horizontally at the width of the JScrollPane's Viewport width.
int	getScrollableUnitIncrement(java.awt.Rectangle visibleRect, int orientation, int direction) Source: http://forums.sun.com/thread.jspa?forumID=57&threadID=5117549&start=7

Methods inherited from class javax.swing.JPanel

getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

VerticalGrowJPanel

public VerticalGrowJPanel()

Method Detail

getPreferredSize

public java.awt.Dimension getPreferredSize()

This method gets called by the JSCrollPane to figure out the size of the Viewport. The getScrollableTracksViewportWidth prevents the components from growing horizontally but we need to figure out the height.

Overrides:

getPreferredSize in class javax.swing.JComponent

Returns:

the preferred size based on the getWidth and getPreferredHeight

getPreferredScrollableViewportSize

public java.awt.Dimension getPreferredScrollableViewportSize()

Source: http://forums.sun.com/thread.jspa?forumID=57&threadID=5117549&start=7

Specified by:

getPreferredScrollableViewportSize in interface javax.swing.Scrollable

Returns:

super.getPreferredSize()

getScrollableBlockIncrement

public int getScrollableBlockIncrement(java.awt.Rectangle visibleRect,
                              int orientation,
                              int direction)

Source: http://forums.sun.com/thread.jspa?forumID=57&threadID=5117549&start=7

Specified by:

getScrollableBlockIncrement in interface javax.swing.Scrollable

Parameters:

visibleRect -

orientation -

direction -

Returns:

the scrollable block increment

getScrollableTracksViewportHeight

public boolean getScrollableTracksViewportHeight()

Allows the JPanel to grow vertically beyond the height of the JScrollPane Viewport.

Specified by:

getScrollableTracksViewportHeight in interface javax.swing.Scrollable

Returns:

false in this case

getScrollableTracksViewportWidth

public boolean getScrollableTracksViewportWidth()

Forces FlowLayout to stop growing horizontally at the width of the JScrollPane's Viewport width.

Specified by:

getScrollableTracksViewportWidth in interface javax.swing.Scrollable

Returns:

true in this class

getScrollableUnitIncrement

public int getScrollableUnitIncrement(java.awt.Rectangle visibleRect,
                             int orientation,
                             int direction)

Source: http://forums.sun.com/thread.jspa?forumID=57&threadID=5117549&start=7

Specified by:

getScrollableUnitIncrement in interface javax.swing.Scrollable

Parameters:

visibleRect -

orientation -

direction -

Returns:

the scrollable unit increment