Class VerticalFlowLayout

java.lang.Object

de.soldin.awt.VerticalFlowLayout

All Implemented Interfaces:

LayoutManager, Serializable

public class VerticalFlowLayout
extends Object
implements LayoutManager, Serializable

This flow layout arranges components in a directional flow, much like lines of text in a paragraph but vertically. The flow direction is determined by the container's componentOrientation property and may be one of two values:

• ComponentOrientation.LEFT_TO_RIGHT
• ComponentOrientation.RIGHT_TO_LEFT

Don't be confused. These are simply interpreted as standard TOP_TO_BOTTOM (LEFT_TO_RIGHT) or BOTTOM_TO_TOP (RIGHT_TO_LEFT) as ComponentOrientation does not provide vertical orientation values.

We arrange components vertically until no more components fit on the same column. The vertical alignment is determined by the align property. The possible values are:

• TOP
• BOTTOM
• CENTER

See main() method in source code for an example on how to use it.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final int	BOTTOM	This value indicates that each column of components should be bottom-justified.
static final int	CENTER	This value indicates that each column of components should be centered.
static final int	HEIGHT
static final int	TOP	This value indicates that each column of components should be top-justified.
static final int	WIDTH

Constructor Summary

Constructors

Constructor	Description
VerticalFlowLayout()	Constructs a new VerticalFlowLayout with a centered alignment and a default 5-unit horizontal and vertical gap.
VerticalFlowLayout(int align)	Constructs a new VerticalFlowLayout with the specified alignment and a default 5-unit horizontal and vertical gap.
VerticalFlowLayout(int align, int hgap, int vgap)	Creates a new flow layout manager with the indicated alignment and the indicated horizontal and vertical gaps.

Method Summary

Modifier and Type	Method	Description
void	addLayoutComponent(String name, Component comp)	Adds the specified component to the layout.
int	getAlignment()	Gets the alignment for this layout.
double	getDefaultRatio()
int	getHgap()	Gets the horizontal gap between components and between the components and the borders of the Container
int	getVgap()	Gets the vertical gap between components and between the components and the borders of the Container.
int	getWrapMode()	Sets the wrap mode for this layout
void	layoutContainer(Container target)	Lays out the container.
static void	main(String[] args)
Dimension	minimumLayoutSize(Container target)	Returns the minimum dimensions needed to layout the visible components contained in the specified target container.
Dimension	preferredLayoutSize(Container target)	Returns the preferred dimensions for this layout given the visible components in the specified target container.
void	removeLayoutComponent(Component comp)	Removes the specified component from the layout.
void	setAlignment(int align)	Sets the alignment for this layout.
void	setDefaultRatio(double defRatio)	Set a default layout ratio.
void	setHgap(int hgap)	Sets the horizontal gap between components and between the components and the borders of the Container.
void	setVgap(int vgap)	Sets the vertical gap between components and between the components and the borders of the Container.
void	setWrapMode(int wrapMode)	Sets the alignment for this layout.
String	toString()	Returns a string representation of this VerticalFlowLayout object and its values.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

TOP

public static final int TOP

This value indicates that each column of components should be top-justified.

See Also:

• Constant Field Values

CENTER

public static final int CENTER

This value indicates that each column of components should be centered.

See Also:

• Constant Field Values

BOTTOM

public static final int BOTTOM

This value indicates that each column of components should be bottom-justified.

See Also:

• Constant Field Values

WIDTH

public static final int WIDTH

See Also:

• Constant Field Values

HEIGHT

public static final int HEIGHT

See Also:

• Constant Field Values

Constructor Details

VerticalFlowLayout

public VerticalFlowLayout()

Constructs a new VerticalFlowLayout with a centered alignment and a default 5-unit horizontal and vertical gap.

VerticalFlowLayout

public VerticalFlowLayout(int align)

Constructs a new VerticalFlowLayout with the specified alignment and a default 5-unit horizontal and vertical gap. The value of the alignment argument must be one of VerticalFlowLayout.TOP, VerticalFlowLayout.BOTTOM, or VerticalFlowLayout.CENTER

Parameters:

align - the alignment value

VerticalFlowLayout

public VerticalFlowLayout(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 VerticalFlowLayout.TOP, VerticalFlowLayout.BOTTOM , or VerticalFlowLayout.CENTER.

Parameters:

align - the alignment value

hgap - the horizontal gap between components and between the components and the borders of the Container

vgap - the vertical gap between components and between the components and the borders of the Container

Method Details

getAlignment

public int getAlignment()

Gets the alignment for this layout. Possible values are VerticalFlowLayout.TOP, VerticalFlowLayout.BOTTOM or VerticalFlowLayout.CENTER,

Returns:

the alignment value for this layout

See Also:

• FlowLayout.setAlignment(int)

setAlignment

public void setAlignment(int align)

Sets the alignment for this layout. Possible values are

• VerticalFlowLayout.TOP
• VerticalFlowLayout.BOTTOM
• VerticalFlowLayout.CENTER

Parameters:

align - one of the alignment values shown above

See Also:

• getAlignment()

getWrapMode

public int getWrapMode()

Sets the wrap mode for this layout

Returns:

int wrap mode

setWrapMode

public void setWrapMode(int wrapMode)

Sets the alignment for this layout. Possible values are

• VerticalFlowLayout.WIDTH (default)
• VerticalFlowLayout.HEIGHT

Parameters:

wrapMode - wrap mode to use : WIDTH (default) or HEIGHT

getDefaultRatio

public double getDefaultRatio()

setDefaultRatio

public void setDefaultRatio(double defRatio)

Set a default layout ratio. See defRatio comment above.

Parameters:

defRatio - default ratio (width/height)

getHgap

public int getHgap()

Gets the horizontal gap between components and between the components and the borders of the Container

Returns:

the horizontal gap between components and between the components and the borders of the Container

Since:

JDK1.1

See Also:

• FlowLayout.setHgap(int)

setHgap

public void setHgap(int hgap)

Sets the horizontal gap between components and between the components and the borders of the Container.

Parameters:

hgap - the horizontal gap between components and between the components and the borders of the Container

Since:

JDK1.1

See Also:

• FlowLayout.getHgap()

getVgap

public int getVgap()

Gets the vertical gap between components and between the components and the borders of the Container.

Returns:

the vertical gap between components and between the components and the borders of the Container

Since:

JDK1.1

See Also:

• FlowLayout.setVgap(int)

setVgap

public void setVgap(int vgap)

Sets the vertical gap between components and between the components and the borders of the Container.

Parameters:

vgap - the vertical gap between components and between the components and the borders of the Container

See Also:

• FlowLayout.getVgap()

addLayoutComponent

public void addLayoutComponent(String name,
 Component comp)

Adds the specified component to the layout. Not used by this class.

Specified by:

addLayoutComponent in interface LayoutManager

Parameters:

name - the name of the component

comp - the component to be added

removeLayoutComponent

public void removeLayoutComponent(Component comp)

Removes the specified component from the layout. Not used by this class.

Specified by:

removeLayoutComponent in interface LayoutManager

Parameters:

comp - the component to remove

See Also:

• Container.removeAll()

preferredLayoutSize

public Dimension preferredLayoutSize(Container target)

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

Specified by:

preferredLayoutSize in interface LayoutManager

Parameters:

target - the container that needs to be laid out

Returns:

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

See Also:

• Container
• minimumLayoutSize(Container)
• Container.getPreferredSize()

minimumLayoutSize

public Dimension minimumLayoutSize(Container target)

Returns the minimum dimensions needed to layout the visible components contained in the specified target container. Not supported by this class! Returns preferredLayoutSize(Container) instead.

Specified by:

minimumLayoutSize in interface LayoutManager

layoutContainer

public void layoutContainer(Container target)

Lays out the container. This method lets each visible component take its preferred size by reshaping the components in the target container in order to satisfy the alignment of this VerticalFlowLayout object.

Specified by:

layoutContainer in interface LayoutManager

Parameters:

target - the specified component being laid out

See Also:

• Container
• Container.doLayout()

toString

public String toString()

Returns a string representation of this VerticalFlowLayout object and its values.

Overrides:

toString in class Object

Returns:

a string representation of this layout

main

public static void main(String[] args)