Interface LayoutManager2
- All Superinterfaces:
LayoutManager
- All Known Implementing Classes:
-
BasicSplitPaneUI.BasicHorizontalLayoutManager,BasicSplitPaneUI.BasicVerticalLayoutManager,BorderLayout,BoxLayout,CardLayout,DefaultMenuLayout,GridBagLayout,GroupLayout,JRootPane.RootLayout,OverlayLayout,SpringLayout
public interface LayoutManager2 extends LayoutManager
Defines an interface for classes that know how to layout Containers based on a layout constraints object. This interface extends the LayoutManager interface to deal with layouts explicitly in terms of constraint objects that specify how and where components should be added to the layout.
This minimal extension to LayoutManager is intended for tool providers who wish to the creation of constraint-based layouts. It does not yet provide full, general support for custom constraint-based layout managers.
- See Also:
-
LayoutManager,Container
Methods
| Modifier and Type | Method | Description |
|---|---|---|
void | addLayoutComponent(Component comp,
Object constraints) | Adds the specified component to the layout, using the specified constraint object. |
float | getLayoutAlignmentX(Container target) | Returns the alignment along the x axis. |
float | getLayoutAlignmentY(Container target) | Returns the alignment along the y axis. |
void | invalidateLayout(Container target) | Invalidates the layout, indicating that if the layout manager has cached information it should be discarded. |
Dimension | maximumLayoutSize(Container target) | Calculates the maximum size dimensions for the specified container, given the components it contains. |
Methods declared in interface java.awt.LayoutManager
addLayoutComponent, layoutContainer, minimumLayoutSize, preferredLayoutSize, removeLayoutComponent Methods
addLayoutComponent
void addLayoutComponent(Component comp,
Object constraints) Adds the specified component to the layout, using the specified constraint object.
- Parameters:
-
comp- the component to be added -
constraints- where/how the component is added to the layout.
maximumLayoutSize
Dimension maximumLayoutSize(Container target)
Calculates the maximum size dimensions for the specified container, given the components it contains.
- Parameters:
-
target- the target container - Returns:
- the maximum size of the container
- See Also:
-
Component.getMaximumSize(),LayoutManager
getLayoutAlignmentX
float getLayoutAlignmentX(Container target)
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:
-
target- the target container - Returns:
- the x-axis alignment preference
getLayoutAlignmentY
float getLayoutAlignmentY(Container target)
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:
-
target- the target container - Returns:
- the y-axis alignment preference
invalidateLayout
void invalidateLayout(Container target)
Invalidates the layout, indicating that if the layout manager has cached information it should be discarded.
- Parameters:
-
target- the target container
© 1993, 2020, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/java/awt/LayoutManager2.html