Module java.desktop
Package javax.swing

Class PopupFactory


  • public class PopupFactory
    extends Object
    PopupFactory, as the name implies, is used to obtain instances of Popups. Popups are used to display a Component above all other Components 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();
     
    Since:
    1.4
    See Also:
    Popup
    • Constructor Detail

      • PopupFactory

        public PopupFactory()
    • Method Detail

      • getSharedInstance

        public static PopupFactory getSharedInstance()
        Returns the shared PopupFactory which can be used to obtain Popups.
        Returns:
        Shared PopupFactory
      • getPopup

        public Popup getPopup​(Component owner,
                              Component contents,
                              int x,
                              int y)
                       throws IllegalArgumentException
        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
        Returns:
        Popup containing Contents
        Throws:
        IllegalArgumentException - if contents is null
      • getPopup

        protected Popup getPopup​(Component owner,
                                 Component contents,
                                 int x,
                                 int y,
                                 boolean isHeavyWeightPopup)
                          throws IllegalArgumentException
        Creates a 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.
        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
        isHeavyWeightPopup - true if Popup should be heavy weight, otherwise popup type will be selected by popup factory.
        Returns:
        Popup containing Contents
        Throws:
        IllegalArgumentException - if contents is null