This defines a mode on how the GUI is displayed.
It is used in conjunction with
initDisplayMode.
When USE_GUI_PRIMITIVE is specified for
initDisplayMode, a GUI primitive will be
returned. This object is where the GUI
of this control will be displayed.
It can be used
in conjunction with other GUI objects, and conforms
to the GUI behaviors as specified by
the platform.
For a given platform, the object returned
must implement or extend from the appropriate GUI primitive
of the platform. For platforms that support only AWT such as
some CDC implementations, the object must
extend from java.awt.Component; for MIDP
implementations with only LCDUI support, it must extend from
javax.microedition.lcdui.Item.
In these cases, the arg argument must be
null or a String that specifies
the fully-qualified classname of the GUI primitive.
On some platforms that support multiple types of GUI primitives,
the arg argument must be used to arbitrate among the
options. The arg argument must be a
String that specifies the fully-qualified
classname of the GUI primitive to be returned by the method.
For example, a platform that supports both AWT and LCDUI
must use either "java.awt.Component" or
"javax.microedition.lcdui.Item" as the
arg argument. The object returned will be
of either type according to what's specified.
Here are some sample usage scenarios:
For CDC implementations with only AWT support:
try {
Player p = Manager.createPlayer("http://abc.mpg");
p.realize();
GUIControl gc;
if ((gc = (GUIControl)p.getControl("GUIControl")) != null)
add((Component)gc.initDisplayMode(GUIControl.USE_GUI_PRIMITIVE, null));
p.start();
} catch (MediaException pe) {
} catch (IOException ioe) {
}
For MIDP implementations with only LCDUI support:
try {
Player p = Manager.createPlayer("http://abc.mpg");
p.realize();
GUIControl gc;
if ((gc = (GUIControl)p.getControl("GUIControl")) != null) {
Form form = new Form("My GUI");
form.append((Item)gc.initDisplayMode(GUIControl.USE_GUI_PRIMITIVE, null));
Display.getDisplay().setCurrent(form);
}
p.start();
} catch (MediaException pe) {
} catch (IOException ioe) {
}
For implementations with both AWT and LCDUI support:
try {
Player p = Manager.createPlayer("http://abc.mpg");
p.realize();
GUIControl gc;
if ((gc = (GUIControl)p.getControl("GUIControl")) != null)
add((Component)gc.initDisplayMode(GUIControl.USE_GUI_PRIMITIVE,
"java.awt.Component");
p.start();
} catch (MediaException pe) {
} catch (IOException ioe) {
}
Value 0 is assigned to USE_GUI_PRIMITIVE.
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