Popup JDK 1.6)

Description

public class Popup

Popups are used to display a Component to the user, typically on top of all the other Components in a particular containment hierarchy.

Popups are used to display a Component to the user, typically on top of all the other Components in a particular containment hierarchy. Popups have a very small life cycle. Once you have obtained a Popup, and hidden it (invoked the hide method), you should no longer invoke any methods on it. This allows the PopupFactory to cache Popups for later use.

The general contract is that if you need to change the size of the Component, or location of the Popup, you should obtain a new Popup.

Popup does not descend from Component, rather implementations of Popup are responsible for creating and maintaining their own Components to render the requested Component to the user.

You typically do not explicitly create an instance of Popup, instead obtain one from a PopupFactory.

See also: PopupFactory

Constructors

protected Popup ()

Creates a Popup.

Creates a Popup. This is provided for subclasses.

protected Popup (Component owner, Component contents, int x, int y)

Creates a Popup for the Component owner containing the Component contents.

Creates a Popup for the Component owner
containing the Component contents. owner
is used to determine which Window the new
Popup will parent the Component the
Popup creates to.
A null owner implies there is no valid parent.
x and
y specify the preferred initial location to place
the Popup at. Based on screen size, or other paramaters,
the Popup may not display at x and
y.
Parameters:
- owner - Component mouse coordinates are relative to, may be null
- contents - Contents of the Popup
- x - Initial x screen coordinate
- y - Initial y screen coordinate
Throws:
- IllegalArgumentException - if contents is null

Methods

Hide/Show inherited methods

pack-private Component createComponent (Component owner)

Creates the Component to use as the parent of the Popup.

Creates the Component to use as the parent of the Popup.
The default implementation creates a Window, subclasses
should override.

pack-private void dispose ()

Frees any resources the Popup may be holding onto.

pack-private Component getComponent ()

Returns the Component returned from createComponent that will hold the Popup.

public void hide ()

Hides and disposes of the Popup.

Hides and disposes of the Popup. Once a Popup
has been disposed you should no longer invoke methods on it. A
disposed Popup may be reclaimed and later used
based on the PopupFactory. As such, if you invoke methods
on a disposed Popup, indeterminate
behavior will result.

pack-private void pack ()

Causes the Popup to be sized to fit the preferred size of the Component it contains.

pack-private void reset (Component owner, Component contents, int ownerX, int ownerY)

Resets the Popup to an initial state.

public void show ()

Makes the Popup visible.

Makes the Popup visible. If the Popup is
currently visible, this has no effect.