Class JRootPane.RootLayout

java.lang.Object
javax.swing.JRootPane.RootLayout
All Implemented Interfaces:
LayoutManager, LayoutManager2, Serializable
Enclosing class:
JRootPane
protected class JRootPane.RootLayout extends Object implements LayoutManager2, Serializable
A custom layout manager that is responsible for the layout of layeredPane, glassPane, and menuBar.

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 Details

    • RootLayout

      protected RootLayout()
      Constructs a RootLayout.

  • Method Details

    • preferredLayoutSize

      public Dimension preferredLayoutSize(Container parent)
      Returns the amount of space the layout would like to have.
      Specified by:
      preferredLayoutSize in interface LayoutManager
      Parameters:
      parent - the Container for which this layout manager is being used
      Returns:
      a Dimension object containing the layout's preferred size
      See Also:

    • minimumLayoutSize

      public Dimension minimumLayoutSize(Container parent)
      Returns the minimum amount of space the layout needs.
      Specified by:
      minimumLayoutSize in interface LayoutManager
      Parameters:
      parent - the Container for which this layout manager is being used
      Returns:
      a Dimension object containing the layout's minimum size
      See Also:

    • maximumLayoutSize

      public Dimension maximumLayoutSize(Container target)
      Returns the maximum amount of space the layout can use.
      Specified by:
      maximumLayoutSize in interface LayoutManager2
      Parameters:
      target - the Container for which this layout manager is being used
      Returns:
      a Dimension object containing the layout's maximum size
      See Also:

    • layoutContainer

      public void layoutContainer(Container parent)
      Instructs the layout manager to perform the layout for the specified container.
      Specified by:
      layoutContainer in interface LayoutManager
      Parameters:
      parent - the Container for which this layout manager is being used

    • addLayoutComponent

      public void addLayoutComponent(String name, Component comp)
      Description copied from interface: LayoutManager
      If the layout manager uses a per-component string, adds the component comp to the layout, associating it with the string specified by name.
      Specified by:
      addLayoutComponent in interface LayoutManager
      Parameters:
      name - the string to be associated with the component
      comp - the component to be added

    • removeLayoutComponent

      public void removeLayoutComponent(Component comp)
      Description copied from interface: LayoutManager
      Removes the specified component from the layout.
      Specified by:
      removeLayoutComponent in interface LayoutManager
      Parameters:
      comp - the component to be removed

    • addLayoutComponent

      public void addLayoutComponent(Component comp, Object constraints)
      Description copied from interface: LayoutManager2
      Adds the specified component to the layout, using the specified constraint object.
      Specified by:
      addLayoutComponent in interface LayoutManager2
      Parameters:
      comp - the component to be added
      constraints - where/how the component is added to the layout.

    • getLayoutAlignmentX

      public float getLayoutAlignmentX(Container target)
      Description copied from interface: LayoutManager2
      Returns the alignment along the x axis. This specifies how the component would like to be aligned relative to other components. The value should be a number between 0 and 1 where 0 represents alignment along the origin, 1 is aligned the furthest away from the origin, 0.5 is centered, etc.
      Specified by:
      getLayoutAlignmentX in interface LayoutManager2
      Parameters:
      target - the target container
      Returns:
      the x-axis alignment preference

    • getLayoutAlignmentY

      public float getLayoutAlignmentY(Container target)
      Description copied from interface: LayoutManager2
      Returns the alignment along the y axis. This specifies how the component would like to be aligned relative to other components. The value should be a number between 0 and 1 where 0 represents alignment along the origin, 1 is aligned the furthest away from the origin, 0.5 is centered, etc.
      Specified by:
      getLayoutAlignmentY in interface LayoutManager2
      Parameters:
      target - the target container
      Returns:
      the y-axis alignment preference

    • invalidateLayout

      public void invalidateLayout(Container target)
      Description copied from interface: LayoutManager2
      Invalidates the layout, indicating that if the layout manager has cached information it should be discarded.
      Specified by:
      invalidateLayout in interface LayoutManager2
      Parameters:
      target - the target container