Java Doc for GridLayout.java in  » 6.0-JDK-Core » AWT » java » awt » Java Source Code / Java DocumentationJava Source Code and Java Documentation

 import java.awt.*;
 import java.applet.Applet;
 public class ButtonGrid extends Applet {
 public void init() {
 setLayout(new GridLayout(3,2));
 add(new Button("1"));
 add(new Button("2"));
 add(new Button("3"));
 add(new Button("4"));
 add(new Button("5"));
 add(new Button("6"));
 }
 }
 

If the container's ComponentOrientation property is horizontal and left-to-right, the above example produces the output shown in Figure 1. If the container's ComponentOrientation property is horizontal and right-to-left, the example produces the output shown in Figure 2.

Figure 1: Horizontal, Left-to-Right	Figure 2: Horizontal, Right-to-Left

When both the number of rows and the number of columns have been set to non-zero values, either by a constructor or by the setRows and setColumns methods, the number of columns specified is ignored. Instead, the number of columns is determined from the specified number of rows and the total number of components in the layout. So, for example, if three rows and two columns have been specified and nine components are added to the layout, they will be displayed as three rows of three columns. Specifying the number of columns affects the layout only when the number of rows is set to zero.
version:
   1.49, 05/05/07
author:
   Arthur van Hoff
since:
   JDK1.0

One, but not both, of rows and cols can be zero, which means that any number of objects can be placed in a row or in a column.
Parameters:
  rows - the rows, with the value zero meaning any number of rows.
Parameters:
  cols - the columns, with the value zero meaning any number of columns.

In addition, the horizontal and vertical gaps are set to the specified values. Horizontal gaps are placed between each of the columns. Vertical gaps are placed between each of the rows.

One, but not both, of rows and cols can be zero, which means that any number of objects can be placed in a row or in a column.

All GridLayout constructors defer to this one.
Parameters:
  rows - the rows, with the value zero meaning any number of rows
Parameters:
  cols - the columns, with the value zero meaning any number of columns
Parameters:
  hgap - the horizontal gap
Parameters:
  vgap - the vertical gap
exception:
  IllegalArgumentException - if the value of bothrows and cols is set to zero

This method reshapes the components in the specified target container in order to satisfy the constraints of the GridLayout object.

The grid layout manager determines the size of individual components by dividing the free space in the container into equal-sized portions according to the number of rows and columns in the layout. The container's free space equals the container's size minus any insets and any specified horizontal or vertical gap. All components in a grid layout are given the same size.
Parameters:
  parent - the container in which to do the layout
See Also:   java.awt.Container
See Also:   java.awt.Container.doLayout

The minimum width of a grid layout is the largest minimum width of all of the components in the container times the number of columns, plus the horizontal padding times the number of columns minus one, plus the left and right insets of the target container.

The minimum height of a grid layout is the largest minimum height of all of the components in the container times the number of rows, plus the vertical padding times the number of rows minus one, plus the top and bottom insets of the target container.
Parameters:
  parent - the container in which to do the layout the minimum dimensions needed to lay out the subcomponents of the specified container
See Also:   java.awt.GridLayout.preferredLayoutSize
See Also:   java.awt.Container.doLayout

The preferred width of a grid layout is the largest preferred width of all of the components in the container times the number of columns, plus the horizontal padding times the number of columns minus one, plus the left and right insets of the target container.

The preferred height of a grid layout is the largest preferred height of all of the components in the container times the number of rows, plus the vertical padding times the number of rows minus one, plus the top and bottom insets of the target container.
Parameters:
  parent - the container in which to do the layout the preferred dimensions to lay out the subcomponents of the specified container
See Also:   java.awt.GridLayout.minimumLayoutSize
See Also:   
See Also:   java.awt.Container.getPreferredSize