Class JXCollapsiblePane

java.lang.Object
java.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JPanel
org.jdesktop.swingx.JXPanel
org.jdesktop.swingx.JXCollapsiblePane
All Implemented Interfaces:
ImageObserver, MenuContainer, Serializable, Accessible, Scrollable, AlphaPaintable, BackgroundPaintable
@JavaBean public class JXCollapsiblePane extends JXPanel
JXCollapsiblePane provides a component which can collapse or expand its content area with animation and fade in/fade out effects. It also acts as a standard container for other Swing components.

The JXCollapsiblePane has a "content pane" that actually holds the displayed contents. This means that colors, fonts, and other display configuration items must be set on the content pane. 

// to set the font
collapsiblePane.getContentPane().setFont(font);
// to set the background color
collapsiblePane.getContentPane().setBackground(Color.RED);
For convenience, the add and remove methods forward to the content pane. The following code shows to ways to add a child to the content pane. 
// to add a child
collapsiblePane.getContentPane().add(component);
// to add a child
collapsiblePane.add(component);
To set the content pane, do not use add, use setContentPane(Container).

In this example, the JXCollapsiblePane is used to build a Search pane which can be shown and hidden on demand. 


JXCollapsiblePane cp = new JXCollapsiblePane();

// JXCollapsiblePane can be used like any other container
cp.setLayout(new BorderLayout());

// the Controls panel with a textfield to filter the tree
JPanel controls = new JPanel(new FlowLayout(FlowLayout.LEFT, 4, 0));
controls.add(new JLabel("Search:"));
controls.add(new JTextField(10));
controls.add(new JButton("Refresh"));
controls.setBorder(new TitledBorder("Filters"));
cp.add("Center", controls);

JXFrame frame = new JXFrame();
frame.setLayout(new BorderLayout());

// Put the "Controls" first
frame.add("North", cp);

// Then the tree - we assume the Controls would somehow filter the tree
JScrollPane scroll = new JScrollPane(new JTree());
frame.add("Center", scroll);

// Show/hide the "Controls"
JButton toggle = new JButton(cp.getActionMap().get(JXCollapsiblePane.TOGGLE_ACTION));
toggle.setText("Show/Hide Search Panel");
frame.add("South", toggle);

frame.pack();
frame.setVisible(true);

The JXCollapsiblePane has a default toggle action registered under the name TOGGLE_ACTION. Bind this action to a button and pressing the button will automatically toggle the pane between expanded and collapsed states. Additionally, you can define the icons to use through the EXPAND_ICON and COLLAPSE_ICON properties on the action. Example 


// get the built-in toggle action
Action toggleAction = collapsible.getActionMap().
  get(JXCollapsiblePane.TOGGLE_ACTION);

// use the collapse/expand icons from the JTree UI
toggleAction.putValue(JXCollapsiblePane.COLLAPSE_ICON,
                      UIManager.getIcon("Tree.expandedIcon"));
toggleAction.putValue(JXCollapsiblePane.EXPAND_ICON,
                      UIManager.getIcon("Tree.collapsedIcon"));

Note: JXCollapsiblePane requires its parent container to have a LayoutManager using getPreferredSize() when calculating its layout (example VerticalLayout, BorderLayout).

See Also:

  • Field Details

    • TOGGLE_ACTION

      public static final String TOGGLE_ACTION
      JXCollapsible has a built-in toggle action which can be bound to buttons. Accesses the action through collapsiblePane.getActionMap().get(JXCollapsiblePane.TOGGLE_ACTION).
      See Also:

    • COLLAPSE_ICON

      public static final String COLLAPSE_ICON
      The icon used by the "toggle" action when the JXCollapsiblePane is expanded, i.e the icon which indicates the pane can be collapsed.
      See Also:

    • EXPAND_ICON

      public static final String EXPAND_ICON
      The icon used by the "toggle" action when the JXCollapsiblePane is collapsed, i.e the icon which indicates the pane can be expanded.
      See Also:

    • collapsed

      private boolean collapsed
      Indicates whether the component is collapsed or expanded

    • direction

      private JXCollapsiblePane.Direction direction
      Defines the orientation of the component.

    • animateTimer

      private Timer animateTimer
      Timer used for doing the transparency animation (fade-in)

    • animator

      private JXCollapsiblePane.AnimationListener animator

    • currentDimension

      private int currentDimension

    • wrapper

      private JXCollapsiblePane.WrapperContainer wrapper

    • useAnimation

      private boolean useAnimation

    • animationParams

      private JXCollapsiblePane.AnimationParams animationParams

    • collapseFiringState

      private boolean collapseFiringState

  • Constructor Details

    • JXCollapsiblePane

      public JXCollapsiblePane()
      Constructs a new JXCollapsiblePane with a JXPanel as content pane and a vertical VerticalLayout with a gap of 2 pixels as layout manager and a vertical orientation.

    • JXCollapsiblePane

      public JXCollapsiblePane(JXCollapsiblePane.Direction direction)
      Constructs a new JXCollapsiblePane with a JXPanel as content pane and the specified direction.
      Parameters:
      direction - the direction to collapse the container

  • Method Details

    • createContentPane

      protected Container createContentPane()
      Creates the content pane used by this collapsible pane.
      Returns:
      the content pane

    • getContentPane

      public Container getContentPane()
      Returns:
      the content pane

    • setContentPane

      public void setContentPane(Container contentPanel)
      Sets the content pane of this JXCollapsiblePane. The contentPanel should implement Scrollable and return true from Scrollable.getScrollableTracksViewportHeight() and Scrollable.getScrollableTracksViewportWidth(). If the content pane fails to do so and a JScrollPane is added as a child, it is likely that the scroll pane will never correctly size. While it is not strictly necessary to implement Scrollable in this way, the default content pane does so.
      Parameters:
      contentPanel - the container delegate used to hold all of the contents for this collapsible pane
      Throws:
      IllegalArgumentException - if contentPanel is null

    • setLayout

      public void setLayout(LayoutManager mgr)
      Overridden to redirect call to the content pane.
      Overrides:
      setLayout in class Container

    • addImpl

      protected void addImpl(Component comp, Object constraints, int index)
      Overridden to redirect call to the content pane.
      Overrides:
      addImpl in class Container

    • remove

      public void remove(Component comp)
      Overridden to redirect call to the content pane
      Overrides:
      remove in class Container

    • remove

      public void remove(int index)
      Overridden to redirect call to the content pane.
      Overrides:
      remove in class Container

    • removeAll

      public void removeAll()
      Overridden to redirect call to the content pane.
      Overrides:
      removeAll in class Container

    • setAnimated

      public void setAnimated(boolean animated)
      If true, enables the animation when pane is collapsed/expanded. If false, animation is turned off.

      When animated, the JXCollapsiblePane will progressively reduce (when collapsing) or enlarge (when expanding) the height of its content area until it becomes 0 or until it reaches the preferred height of the components it contains. The transparency of the content area will also change during the animation.

      If not animated, the JXCollapsiblePane will simply hide (collapsing) or show (expanding) its content area.

      Parameters:
      animated -

    • isAnimated

      public boolean isAnimated()
      Returns:
      true if the pane is animated, false otherwise
      See Also:

    • setComponentOrientation

      public void setComponentOrientation(ComponentOrientation o)
      Overrides:
      setComponentOrientation in class Component

    • setDirection

      public void setDirection(JXCollapsiblePane.Direction direction)
      Changes the direction of this collapsible pane. Doing so changes the layout of the underlying content pane. If the chosen direction is vertical, a vertical layout with a gap of 2 pixels is chosen. Otherwise, a horizontal layout with a gap of 2 pixels is chosen.
      Parameters:
      direction - the new JXCollapsiblePane.Direction for this collapsible pane
      Throws:
      IllegalStateException - when this method is called while a collapsing/restore operation is running
      See Also:

    • getDirection

      public JXCollapsiblePane.Direction getDirection()
      Returns:
      the current JXCollapsiblePane.Direction.
      See Also:

    • isCollapsed

      public boolean isCollapsed()
      Returns:
      true if the pane is collapsed, false if expanded

    • setCollapsed

      public void setCollapsed(boolean val)
      Expands or collapses this JXCollapsiblePane.

      If the component is collapsed and val is false, then this call expands the JXCollapsiblePane, such that the entire JXCollapsiblePane will be visible. If isAnimated() returns true, the expansion will be accompanied by an animation.

      However, if the component is expanded and val is true, then this call collapses the JXCollapsiblePane, such that the entire JXCollapsiblePane will be invisible. If isAnimated() returns true, the collapse will be accompanied by an animation.

      As of SwingX 1.6.3, JXCollapsiblePane only fires property change events when the component's state is accurate. This means that animated collapsible pane's only fire events once the animation is complete.

      See Also:

    • getBorder

      public Border getBorder()
      Overrides:
      getBorder in class JComponent

    • setBorder

      public void setBorder(Border border)
      Overrides:
      setBorder in class JComponent

    • setOpaque

      public void setOpaque(boolean opaque)

      Setting the component to be opaque will reset the alpha setting to 1f (full opaqueness). Setting the component to be non-opaque will restore the previous alpha transparency. If the component is non-opaque with a fully-opaque alpha value (1f), the behavior should be the same as as a JPanel that is non-opaque.

      Internals of JXCollasiplePane are designed to be opaque because some Look and Feel implementations having painting issues otherwise. JXCollapsiblePane and its internals will respect setOpaque, calling this method will not only update the collapsible pane, but also all internals. This method does not modify the content pane, as it is not considered an internal.

      Overrides:
      setOpaque in class JXPanel

    • getMinimumSize

      public Dimension getMinimumSize()
      A collapsible pane always returns its preferred size for the minimum size to ensure that the collapsing happens correctly.

      To query the minimum size of the contents user getContentPane().getMinimumSize().

      Overrides:
      getMinimumSize in class JComponent
      Returns:
      the preferred size of the component

    • setMinimumSize

      public void setMinimumSize(Dimension minimumSize)
      Forwards to the content pane.
      Overrides:
      setMinimumSize in class JComponent
      Parameters:
      minimumSize - the size to set on the content pane

    • getPreferredSize

      public Dimension getPreferredSize()
      The critical part of the animation of this JXCollapsiblePane relies on the calculation of its preferred size. During the animation, its preferred size (specially its height) will change, when expanding, from 0 to the preferred size of the content pane, and the reverse when collapsing.
      Overrides:
      getPreferredSize in class JComponent
      Returns:
      this component preferred size

    • setPreferredSize

      public void setPreferredSize(Dimension preferredSize)
      Overrides:
      setPreferredSize in class JComponent

    • setAnimationParams

      private void setAnimationParams(JXCollapsiblePane.AnimationParams params)
      Sets the parameters controlling the animation
      Parameters:
      params -
      Throws:
      IllegalArgumentException - if params is null