Class ViewportLayout

java.lang.Object
javax.swing.ViewportLayout
All Implemented Interfaces:
LayoutManager, Serializable
public class ViewportLayout extends Object implements LayoutManager, Serializable
The default layout manager for JViewport. ViewportLayout defines a policy for layout that should be useful for most applications. The viewport makes its view the same size as the viewport, however it will not make the view smaller than its minimum size. As the viewport grows the view is kept bottom justified until the entire view is visible, subsequently the view is kept top justified.

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.

Since:
1.2

  • Constructor Summary

    Constructors
    Constructor
    Description
    ViewportLayout()
    Constructs a ViewportLayout.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    addLayoutComponent(String name, Component c)
    Adds the specified component to the layout.
    void
    layoutContainer(Container parent)
    Called by the AWT when the specified container needs to be laid out.
    Dimension
    minimumLayoutSize(Container parent)
    Returns the minimum dimensions needed to layout the components contained in the specified target container.
    Dimension
    preferredLayoutSize(Container parent)
    Returns the preferred dimensions for this layout given the components in the specified target container.
    void
    removeLayoutComponent(Component c)
    Removes the specified component from the layout.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • ViewportLayout

      public ViewportLayout()
      Constructs a ViewportLayout.

  • Method Details

    • addLayoutComponent

      public void addLayoutComponent(String name, Component c)
      Adds the specified component to the layout. Not used by this class.
      Specified by:
      addLayoutComponent in interface LayoutManager
      Parameters:
      name - the name of the component
      c - the component to be added

    • removeLayoutComponent

      public void removeLayoutComponent(Component c)
      Removes the specified component from the layout. Not used by this class.
      Specified by:
      removeLayoutComponent in interface LayoutManager
      Parameters:
      c - the component to remove

    • preferredLayoutSize

      public Dimension preferredLayoutSize(Container parent)
      Returns the preferred dimensions for this layout given the components in the specified target container.
      Specified by:
      preferredLayoutSize in interface LayoutManager
      Parameters:
      parent - the component which needs to be laid out
      Returns:
      a Dimension object containing the preferred dimensions
      See Also:

    • minimumLayoutSize

      public Dimension minimumLayoutSize(Container parent)
      Returns the minimum dimensions needed to layout the components contained in the specified target container.
      Specified by:
      minimumLayoutSize in interface LayoutManager
      Parameters:
      parent - the component which needs to be laid out
      Returns:
      a Dimension object containing the minimum dimensions
      See Also:

    • layoutContainer

      public void layoutContainer(Container parent)
      Called by the AWT when the specified container needs to be laid out.
      Specified by:
      layoutContainer in interface LayoutManager
      Parameters:
      parent - the container to lay out
      Throws:
      AWTError - if the target isn't the container specified to the BoxLayout constructor