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java.lang.Objectorg.havi.ui.HScreenDevice
org.havi.ui.HGraphicsDevice
org.havi.ui.HEmulatedGraphicsDevice
An HEmulatedGraphicsDevice
is a "virtual" graphics device
that has the capability to be configured to perform one (of many)
possible emulations. For example, in the DVB context a 4:3
television might have an HEmulatedGraphicsDevice
that had an HEmulatedGraphicsConfiguration
that emulated a virtual 14:9
display. The 14:9 HEmulatedGraphicsConfiguration
would be used for rendering into
from AWT, whilst being displayed on the "true" 4:3
physical display. The relationship between the emulation and
implementation is encapsulated within the HEmulatedGraphicsConfiguration
.
An HEmulatedGraphicsDevice
transforms both AWT pixel-oriented drawing
operations and AWT user-input event coordinates, this is performed
outside of the Java application (typically in hardware).
An HEmulatedGraphicsDevice
may (of necessity) modify coordinates for
Components and/or events to the nearest physical / virtual pixel
--- authors should not depend on single pixel accuracy.
There is no difference to a Java application between an HGraphicsDevice
and an HEmulatedGraphicsDevice
,
except for the implication of possible rounding errors in integer
pixel positions, e.g. Component placement and/or resolution of
events.
Java2D mechanisms should behave as per their normal semantics, with respect to display on-screen.
Constructor Summary | |
protected |
HEmulatedGraphicsDevice()
It is not intended that applications should directly construct HEmulatedGraphicsDevice objects.
|
Method Summary | |
boolean |
setGraphicsConfiguration(HEmulatedGraphicsConfiguration hegc)
Set the graphics configuration for the device. |
Methods inherited from class org.havi.ui.HGraphicsDevice |
getBestConfiguration, getBestConfiguration, getConfigurations, getCurrentConfiguration, getDefaultConfiguration, setGraphicsConfiguration |
Methods inherited from class org.havi.ui.HScreenDevice |
addResourceStatusEventListener, addScreenConfigurationListener, addScreenConfigurationListener, getClient, getIDstring, getScreenAspectRatio, releaseDevice, removeResourceStatusEventListener, removeScreenConfigurationListener, reserveDevice |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
protected HEmulatedGraphicsDevice()
HEmulatedGraphicsDevice
objects.
Creates an HEmulatedGraphicsDevice
object. See the class description for
details of constructor parameters and default values.
Method Detail |
public boolean setGraphicsConfiguration(HEmulatedGraphicsConfiguration hegc) throws java.lang.SecurityException, HPermissionDeniedException, HConfigurationException
hegc
- the HEmulatedGraphicsConfiguration
to which this device should be
set.
java.lang.SecurityException
- if the application does not have
sufficient rights to set the configuration for this device.
HPermissionDeniedException
- (HPermissionDeniedException
) if the application does not
currently have the right to set the configuration for this
device.
HConfigurationException
- (HConfigurationException
)
if the specified configuration is not valid for this device.
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