Class java.awt.FlowLayout
All Packages Class Hierarchy This Package Previous Next Index
Class java.awt.FlowLayout
Object
|
+----java.awt.FlowLayout
- public class FlowLayout
- extends Object
- implements LayoutManager, Serializable
A flow layout arranges components in a left-to-right flow, much
like lines of text in a paragraph. Flow layouts are typically used
to arrange buttons in a panel. It will arrange
buttons left to right until no more buttons fit on the same line.
Each line is centered.
For example, the following picture shows an applet using the flow
layout manager (its default layout manager) to position three buttons:
Here is the code for this applet:
import java.awt.*;
import java.applet.Applet;
public class myButtons extends Applet {
Button button1, button2, button3;
public void init() {
button1 = new Button("Ok");
button2 = new Button("Open");
button3 = new Button("Close");
add(button1);
add(button2);
add(button3);
}
}
A flow layout lets each component assume its natural (preferred) size.
- Version:
- 1.27, 07/01/98
- Author:
- Arthur van Hoff, Sami Shaio
- Since:
- JDK1.0
-
CENTER
- This value indicates that each row of components
should be centered.
-
LEFT
- This value indicates that each row of components
should be left-justified.
-
RIGHT
- This value indicates that each row of components
should be right-justified.
-
java.awt.FlowLayout()
- Constructs a new Flow Layout with a centered alignment and a
default 5-unit horizontal and vertical gap.
-
java.awt.FlowLayout(int)
- Constructs a new Flow Layout with the specified alignment and a
default 5-unit horizontal and vertical gap.
-
java.awt.FlowLayout(int, int, int)
- Creates a new flow layout manager with the indicated alignment
and the indicated horizontal and vertical gaps.
-
addLayoutComponent(String, Component)
- Adds the specified component to the layout.
-
getAlignment()
- Gets the alignment for this layout.
-
getHgap()
- Gets the horizontal gap between components.
-
getVgap()
- Gets the vertical gap between components.
-
layoutContainer(Container)
- Lays out the container.
-
minimumLayoutSize(Container)
- Returns the minimum dimensions needed to layout the components
contained in the specified target container.
-
preferredLayoutSize(Container)
- Returns the preferred dimensions for this layout given the components
in the specified target container.
-
removeLayoutComponent(Component)
- Removes the specified component from the layout.
-
setAlignment(int)
- Sets the alignment for this layout.
-
setHgap(int)
- Sets the horizontal gap between components.
-
setVgap(int)
- Sets the vertical gap between components.
-
toString()
- Returns a string representation of this
FlowLayout
object and its values.
CENTER
public static final int CENTER
- This value indicates that each row of components
should be centered.
- Since:
JDK1.0
LEFT
public static final int LEFT
- This value indicates that each row of components
should be left-justified.
- Since:
JDK1.0
RIGHT
public static final int RIGHT
- This value indicates that each row of components
should be right-justified.
- Since:
JDK1.0
FlowLayout
public FlowLayout()
- Constructs a new Flow Layout with a centered alignment and a
default 5-unit horizontal and vertical gap.
- Since:
- JDK1.0
FlowLayout
public FlowLayout(int align)
- Constructs a new Flow Layout with the specified alignment and a
default 5-unit horizontal and vertical gap.
The value of the alignment argument must be one of
FlowLayout.LEFT
, FlowLayout.RIGHT
,
or FlowLayout.CENTER
.
- Parameters:
- align - the alignment value
- Since:
- JDK1.0
FlowLayout
public FlowLayout(int align,
int hgap,
int vgap)
- Creates a new flow layout manager with the indicated alignment
and the indicated horizontal and vertical gaps.
The value of the alignment argument must be one of
FlowLayout.LEFT
, FlowLayout.RIGHT
,
or FlowLayout.CENTER
.
- Parameters:
- align - the alignment value.
- hgap - the horizontal gap between components.
- vgap - the vertical gap between components.
- Since:
- JDK1.0
addLayoutComponent
public void addLayoutComponent(String name,
Component comp)
- Adds the specified component to the layout. Not used by this class.
- Parameters:
- name - the name of the component
- comp - the component to be added
- Since:
- JDK1.0
getAlignment
public int getAlignment()
- Gets the alignment for this layout.
Possible values are
FlowLayout.LEFT
,
FlowLayout.RIGHT
, or FlowLayout.CENTER
.
- Returns:
- the alignment value for this layout.
- Since:
- JDK1.1
- See Also:
- setAlignment
getHgap
public int getHgap()
- Gets the horizontal gap between components.
- Returns:
- the horizontal gap between components.
- Since:
- JDK1.1
- See Also:
- setHgap
getVgap
public int getVgap()
- Gets the vertical gap between components.
- Returns:
- the vertical gap between components.
- Since:
- JDK1.1
- See Also:
- setVgap
layoutContainer
public void layoutContainer(Container target)
- Lays out the container. This method lets each component take
its preferred size by reshaping the components in the
target container in order to satisfy the constraints of
this
FlowLayout
object.
- Parameters:
- target - the specified component being laid out.
- Since:
- JDK1.0
- See Also:
- Container, doLayout
minimumLayoutSize
public java.awt.Dimension minimumLayoutSize(Container target)
- Returns the minimum dimensions needed to layout the components
contained in the specified target container.
- Parameters:
- target - the component which needs to be laid out
- Returns:
- the minimum dimensions to lay out the
subcomponents of the specified container.
- Since:
- JDK1.0
- See Also:
- preferredLayoutSize, Container, doLayout
preferredLayoutSize
public java.awt.Dimension preferredLayoutSize(Container target)
- Returns the preferred dimensions for this layout given the components
in the specified target container.
- Parameters:
- target - the component which needs to be laid out
- Returns:
- the preferred dimensions to lay out the
subcomponents of the specified container.
- Since:
- JDK1.0
- See Also:
- Container, minimumLayoutSize, getPreferredSize
removeLayoutComponent
public void removeLayoutComponent(Component comp)
- Removes the specified component from the layout. Not used by
this class.
- Parameters:
- comp - the component to remove
- Since:
- JDK1.0
- See Also:
- removeAll
setAlignment
public void setAlignment(int align)
- Sets the alignment for this layout.
Possible values are
FlowLayout.LEFT
,
FlowLayout.RIGHT
, and FlowLayout.CENTER
.
- Parameters:
- align - the alignment value.
- Since:
- JDK1.1
- See Also:
- getAlignment
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
public void setVgap(int vgap)
- Sets the vertical gap between components.
- Parameters:
- vgap - the vertical gap between components
- Since:
- JDK1.1
- See Also:
- getVgap
toString
public java.lang.String toString()
- Returns a string representation of this
FlowLayout
object and its values.
- Returns:
- a string representation of this layout.
- Overrides:
- toString in class Object
- Since:
- JDK1.0
All Packages Class Hierarchy This Package Previous Next Index