public class PopupFactory extends Object
PopupFactory
, as the name implies, is used to obtain instances of Popup
s. Popup
s are used to display a Component
above all other Component
s in a particular containment hierarchy. The general contract is that once you have obtained a Popup
from a PopupFactory
, you must invoke hide
on the Popup
. The typical usage is: PopupFactory factory = PopupFactory.getSharedInstance(); Popup popup = factory.getPopup(owner, contents, x, y); popup.show(); ... popup.hide();
Constructor | Description |
---|---|
PopupFactory() |
Constructs a PopupFactory . |
Modifier and Type | Method | Description |
---|---|---|
Popup |
getPopup |
Creates a Popup for the Component owner containing the Component contents . |
protected Popup |
getPopup |
Creates a Popup for the Component owner containing the Component contents . |
static PopupFactory |
getSharedInstance() |
Returns the shared PopupFactory which can be used to obtain Popup s. |
static void |
setSharedInstance |
Sets the PopupFactory that will be used to obtain Popup s. |
public PopupFactory()
PopupFactory
.public Popup getPopup(Component owner, Component contents, int x, int y) throws IllegalArgumentException
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 parameters, the Popup
may not display at x
and y
.owner
- Component mouse coordinates are relative to, may be nullcontents
- Contents of the Popupx
- Initial x screen coordinatey
- Initial y screen coordinateIllegalArgumentException
- if contents is nullprotected Popup getPopup(Component owner, Component contents, int x, int y, boolean isHeavyWeightPopup) throws IllegalArgumentException
Popup
for the Component owner
containing the Component contents
. The window containing the component owner
will be used as the parent window. 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 parameters, the Popup
may not display at x
and y
. isHeavyWeightPopup
specifies if the Popup
will be heavyweight. Passing true
will force the Popup
type to be heavyweight, otherwise Popup
type will be selected by Popup
factory. Lightweight Popup
windows are more efficient than heavyweight (native peer) windows, but lightweight and heavyweight components do not mix well in a GUI. This method is intended to be used only by PopupFactory sub-classes.owner
- Component mouse coordinates are relative to, may be nullcontents
- Contents of the Popupx
- Initial x screen coordinatey
- Initial y screen coordinateisHeavyWeightPopup
- true if Popup should be heavy weight, otherwise popup type will be selected by popup factory.IllegalArgumentException
- if contents is null
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/PopupFactory.html