Java java.awt Class CardLayout（JDK8）

Constructor Detail

• CardLayout

  public CardLayout()

  Creates a new card layout with gaps of size zero.

• CardLayout

  public CardLayout(int hgap,
                    int vgap)

  Creates a new card layout with the specified horizontal and vertical gaps. The horizontal gaps are placed at the left and right edges. The vertical gaps are placed at the top and bottom edges.

  Parameters:

  hgap - the horizontal gap.

  vgap - the vertical gap.

Method Detail

• getHgap

  public int getHgap()

  Gets the horizontal gap between components.

  Returns:

  the horizontal gap between components.

  Since:

  JDK1.1

  See Also:

  setHgap(int), getVgap()

• setHgap

  public void setHgap(int hgap)

  Sets the horizontal gap between components.

  Parameters:

  hgap - the horizontal gap between components.

  Since:

  JDK1.1

  See Also:

  getHgap(), setVgap(int)

• getVgap

  public int getVgap()

  Gets the vertical gap between components.

  Returns:

  the vertical gap between components.

  See Also:

  setVgap(int), getHgap()

• setVgap

  public void setVgap(int vgap)

  Sets the vertical gap between components.

  Parameters:

  vgap - the vertical gap between components.

  Since:

  JDK1.1

  See Also:

  getVgap(), setHgap(int)

• addLayoutComponent

  public void addLayoutComponent(Component comp,
                                 Object constraints)

  Adds the specified component to this card layout's internal table of names. The object specified by constraints must be a string. The card layout stores this string as a key-value pair that can be used for random access to a particular card. By calling the show method, an application can display the component with the specified name.

  Specified by:

  addLayoutComponent in interface LayoutManager2

  Parameters:

  comp - the component to be added.

  constraints - a tag that identifies a particular card in the layout.

  Throws:

  IllegalArgumentException - if the constraint is not a string.

  See Also:

  show(java.awt.Container, java.lang.String)

• addLayoutComponent

  @Deprecated
  public void addLayoutComponent(String name,
                                             Component comp)

  Deprecated. replaced by addLayoutComponent(Component, Object).
  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)

  Removes the specified component from the layout. If the card was visible on top, the next card underneath it is shown.

  Specified by:

  removeLayoutComponent in interface LayoutManager

  Parameters:

  comp - the component to be removed.

  See Also:

  Container.remove(java.awt.Component), Container.removeAll()

• preferredLayoutSize

  public Dimension preferredLayoutSize(Container parent)

  Determines the preferred size of the container argument using this card layout.

  Specified by:

  preferredLayoutSize in interface LayoutManager

  Parameters:

  parent - the parent container in which to do the layout

  Returns:

  the preferred dimensions to lay out the subcomponents of the specified container

  See Also:

  Container.getPreferredSize(), minimumLayoutSize(java.awt.Container)

• minimumLayoutSize

  public Dimension minimumLayoutSize(Container parent)

  Calculates the minimum size for the specified panel.

  Specified by:

  minimumLayoutSize in interface LayoutManager

  Parameters:

  parent - the parent container in which to do the layout

  Returns:

  the minimum dimensions required to lay out the subcomponents of the specified container

  See Also:

  Container.doLayout(), preferredLayoutSize(java.awt.Container)

• maximumLayoutSize

  public Dimension maximumLayoutSize(Container target)

  Returns the maximum dimensions for this layout given the components in the specified target container.

  Specified by:

  maximumLayoutSize in interface LayoutManager2

  Parameters:

  target - the component which needs to be laid out

  See Also:

  Container, minimumLayoutSize(java.awt.Container), preferredLayoutSize(java.awt.Container)

• getLayoutAlignmentX

  public float getLayoutAlignmentX(Container parent)

  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

• getLayoutAlignmentY

  public float getLayoutAlignmentY(Container parent)

  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

• invalidateLayout

  public void invalidateLayout(Container target)

  Invalidates the layout, indicating that if the layout manager has cached information it should be discarded.

  Specified by:

  invalidateLayout in interface LayoutManager2

• layoutContainer

  public void layoutContainer(Container parent)

  Lays out the specified container using this card layout.

  Each component in the parent container is reshaped to be the size of the container, minus space for surrounding insets, horizontal gaps, and vertical gaps.

  Specified by:

  layoutContainer in interface LayoutManager

  Parameters:

  parent - the parent container in which to do the layout

  See Also:

  Container.doLayout()

• first

  public void first(Container parent)

  Flips to the first card of the container.

  Parameters:

  parent - the parent container in which to do the layout

  See Also:

  last(java.awt.Container)

• next

  public void next(Container parent)

  Flips to the next card of the specified container. If the currently visible card is the last one, this method flips to the first card in the layout.

  Parameters:

  parent - the parent container in which to do the layout

  See Also:

  previous(java.awt.Container)

• previous

  public void previous(Container parent)

  Flips to the previous card of the specified container. If the currently visible card is the first one, this method flips to the last card in the layout.

  Parameters:

  parent - the parent container in which to do the layout

  See Also:

  next(java.awt.Container)

• last

  public void last(Container parent)

  Flips to the last card of the container.

  Parameters:

  parent - the parent container in which to do the layout

  See Also:

  first(java.awt.Container)

• show

  public void show(Container parent,
                   String name)

  Flips to the component that was added to this layout with the specified name, using addLayoutComponent. If no such component exists, then nothing happens.

  Parameters:

  parent - the parent container in which to do the layout

  name - the component name

  See Also:

  addLayoutComponent(java.awt.Component, java.lang.Object)

• toString

  public String toString()

  Returns a string representation of the state of this card layout.

  Overrides:

  toString in class Object

  Returns:

  a string representation of this card layout.