| FlowLayout |
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typedict |
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A
FlowLayout
is a simple layout manager that arranges the components in a container
in one or more rows in the same order that they appear in the
container's
layout
array.
Components should be AWT or Swing components, however all layout managers
build a label appropriate for the container they are working on when they
find a
String
in the layout array where they expected a component.
Properties, like the font or foreground color, used by these short-hand
labels can not be directly specified, so they are inherited from the
container.
A new row is started when a component will not fit at the end of the
current row.
The fields in a
FlowLayout
are:
| alignment |
An
int
that controls the positioning of the components in the container.
The value should be
LEFT,
CENTER,
or
RIGHT,
which are defined in
yoix.awt
and
yoix.swing.
| | hgap |
A
double
that represents the horizontal spacing between components in units
of 72 dots per inch.
| | type |
A read-only
int
that is set to
FLOWLAYOUT,
which is defined in
yoix.awt
and
yoix.swing.
| | vgap |
A
double
that represents the vertical spacing between components in units
of 72 dots per inch.
|
A
Panel
uses
FlowLayout
as its default layout manager.
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| Example: |
The program,
import yoix.*.*;
Array alignments = {LEFT, CENTER, RIGHT};
Frame f = {
FlowLayout layoutmanager = {
int vgap = 72;
};
Array layout = {
new Button {
String text = "Align";
actionPerformed(e) {
int n = (100*random())%3;
root.layoutmanager.alignment = alignments[n];
root.layoutmanager = root.layoutmanager; // do layout
}
},
new Button {
String text = "Shift";
actionPerformed(e) {
root.layoutmanager.hgap += 10;
root.layoutmanager = root.layoutmanager; // do layout
}
},
new Button {
String text = "Dismiss";
actionPerformed(e) {
exit(0);
}
},
};
};
f.visible = TRUE;
adds three buttons to a frame that uses a
FlowLayout
as its layout manager.
The program also shows how to modify layout manager fields and
then have the changes show up as a new arrangement of the three
buttons.
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| See Also: |
BorderLayout,
BoxLayout,
CardLayout,
CustomLayout,
GridBagLayout,
GridLayout,
LayoutManager
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Yoix is a registered trademark of AT&T Inc.
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