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Class com.sun.wizards.awt.NavigationLayout

java.lang.Object
   |
   +----com.sun.wizards.awt.NavigationLayout

public class NavigationLayout

extends Object

implements LayoutManager, LayoutManager2, Serializable

    -----------------------------------------
    |            |                          |
    |            |                          |
    |            |                          |
    |            |                          |
    |            |                          |
    |            |                          |
    | Image      |        Tree              |
    |            |                          |
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    -----------------------------------------
    |                                       |
    |          Navigation                   |
    -----------------------------------------
 

The Navigation panel has a fixed height, and the width will vary according to the width of the frame. The NavigationLayout will have 2 parts: a "Navigation" area and an "Action" area.

These parts will be separated by a small amount to give the user a sense of function separation.

The buttons placed in the navigation area will facilitate a navigation function. Examples are: "back", "next", and "finish".

The buttons placed in the action area will facilitate special actions that the software may have available. Examples are: "cancel", "exit", and "help".

Here is the code for this applet:

 import java.applet.Applet;
 import java.awt.*;
 import com.sun.wizards.awt.*;
 public class Test extends Applet
 {
   public void init()
     {
       setLayout(new NavigationLayout());
       add(new Button("  Back  "), "Navigation");
       add(new Button("  Next  "), "Navigation");
       add(new Button("  Exit  "), "Action");
     }
 }
 

NavigationLayout()

Creates a navigation layout with horizontal and vertical gaps of 5 pixels.

NavigationLayout(int, int)

Creates a navigation layout with the specified horizontal and vertical gaps.

addLayoutComponent(Component, Object)

Adds the specified component to the layout using the specified constraint object.

addLayoutComponent(String, Component)

Adds the specified component with the specified constraint to the layout.

getLayoutAlignmentX(Container)

Returns the alignment along the x axis.

getLayoutAlignmentY(Container)

Returns the alignment along the y axis.

invalidateLayout(Container)

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

layoutContainer(Container)

Lays out the container in the specified panel.

maximumLayoutSize(Container)

Returns the maximum size of this component.

minimumLayoutSize(Container)

Calculates the minmum size dimensions for the specified panel given the components in the specified parent container.

preferredLayoutSize(Container)

Calculates the preferred size dimensions for the specified panel given the components in the specified parent container.

removeLayoutComponent(Component)

Removes the specified component from the layout.

 public NavigationLayout()

Creates a navigation layout with horizontal and vertical gaps of 5 pixels.

 public NavigationLayout(int hgap,
                         int vgap)

Creates a navigation layout with the specified horizontal and vertical gaps.

Parameters:

hgap - The horizontal gap.

vgap - The vertical gap.

 public void addLayoutComponent(String constraint,
                                Component comp)

Adds the specified component with the specified constraint to the layout. Legal values for constraint are: "Navigation" "Action" "Separator"

Parameters:

constraint - The position where the component should be added.

comp - The component to be added.

 public void addLayoutComponent(Component comp,
                                Object constraints)

Adds the specified component to the layout using the specified constraint object. The constraints object for a NavigatioLayout must be a String indicating which region the component is to be added to. Legal values for constraints are: "Navigation", "Action", and "Separator".

Parameters:

comp - The component to be added.

constraints - A string object indicating where the specified component should be added.

 public void removeLayoutComponent(Component comp)

Removes the specified component from the layout.

Parameters:

comp - The component to be removed.

 public Dimension minimumLayoutSize(Container parent)

Calculates the minmum size dimensions for the specified panel given the components in the specified parent container.

Parameters:

parent - The component to be laid out.

 public Dimension preferredLayoutSize(Container parent)

Calculates the preferred size dimensions for the specified panel given the components in the specified parent container.

Parameters:

parent - The component to be laid out.

 public void layoutContainer(Container parent)

Lays out the container in the specified panel.

Parameters:

parent - The component which needs to be laid out.

 public Dimension maximumLayoutSize(Container parent)

Returns the maximum size of this component.

Parameters:

parent - The parent container.

 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.

Parameters:

parent - The parent container.

 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.

Parameters:

parent - The parent container.

 public void invalidateLayout(Container parent)

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

Parameters:

parent - The parent container.

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