com.gargoylesoftware.base.gui
Class DelayedComponentLoaderPanel

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              com.gargoylesoftware.base.gui.DelayedComponentLoaderPanel

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable

public class DelayedComponentLoaderPanel

extends JComponent

A panel that supports delayed loading of its contents. This is useful when the component that will fill this panel will take a long time to load. A "please wait" message will be displayed while the component is being loaded. When loading is complete, the new component will be made a child of this panel so that it can become visible.

The following sample will create a delayed loader with a default "please wait" message.

 final DelayedComponentLoaderPanel panel = new DelayedComponentLoaderPanel();
 panel.setComponentLoader( new DefaultComponentLoader(MyExpensiveComponent.class) );
 

This sample has a custom message.

 final JLabel label = new JLabel("My custom wait message");
 final DelayedComponentLoaderPanel panel = new DelayedComponentLoaderPanel(label);
 panel.setComponentLoader( new DefaultComponentLoader(MyExpensiveComponent.class) );
 

Version:

$Revision: 1.7 $

Author:

Mike Bowler

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent

Nested classes inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BltBufferStrategy, 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

DelayedComponentLoaderPanel()
Create a new panel that will display a simple "please wait" message when it is loading.

DelayedComponentLoaderPanel(Component waitingComponent)
Create a new panel that will display the specified waitingComponent while it is loading.

Method Summary

void	addDelayedComponentLoaderListener(DelayedComponentLoaderListener listener) Add the specified listener.
protected void	assertNotNull(String fieldName, Object object) Throw an exception if the specified object is null
void	removeDelayedComponentLoaderListener(DelayedComponentLoaderListener listener) Remove the specified listener.
void	setComponentLoader(ComponentLoader loader) Set the new component loader.

Methods inherited from class javax.swing.JComponent

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

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setLayout, transferFocusBackward, 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, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, 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, processMouseEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Constructor Detail

DelayedComponentLoaderPanel

public DelayedComponentLoaderPanel()

Create a new panel that will display a simple "please wait" message when it is loading.

DelayedComponentLoaderPanel

public DelayedComponentLoaderPanel(Component waitingComponent)

Create a new panel that will display the specified waitingComponent while it is loading.

Parameters:

waitingComponent - The component to display while loading is in progress.

Method Detail

setComponentLoader

public void setComponentLoader(ComponentLoader loader)

Set the new component loader. The waiting component will be displayed immediately and component loading will start on a background thread. If the new loader is null then no loading will take place and the waiting component will be displayed indefinitely

Parameters:

loader - The new component loader.

addDelayedComponentLoaderListener

public void addDelayedComponentLoaderListener(DelayedComponentLoaderListener listener)

Add the specified listener.

Parameters:

listener - The new listener

removeDelayedComponentLoaderListener

public void removeDelayedComponentLoaderListener(DelayedComponentLoaderListener listener)

Remove the specified listener.

Parameters:

listener - the listener to remove.

assertNotNull

protected final void assertNotNull(String fieldName,
                                   Object object)

Throw an exception if the specified object is null

Parameters:

fieldName - The name of the paremeter we are checking

object - The value of the parameter we are checking