org.eclipse.birt.chart.device
Class DisplayAdapter

java.lang.Object
  extended by org.eclipse.birt.chart.device.DisplayAdapter
All Implemented Interfaces:
IDisplayServer

public class DisplayAdapter
extends java.lang.Object
implements IDisplayServer

A no-op adapter implementation for the IDisplayServerinterface definition.


Constructor Summary
DisplayAdapter()
           
 
Method Summary
 java.lang.Object createFont(FontDefinition fd)
          Attempts to create a new font resource associated with a specific device for use in rendering or computations
 void debug()
          Lists out all resources that were previously logged explicitly by the logCreation(Object) method or those internally created by each of the resource creation methods.
 void dispose()
          A notification sent to the device to free all allocated system resources.
 java.lang.Object getColor(ColorDefinition cd)
          Attempts to create a new color resource associated with a specific device
 int getDpiResolution()
          Returns the resolution of the device in dots per inch As an example, for a display screen, the dots correspond to pixels and a typical value for a Win32 OS is 96 DPI.
 java.util.Locale getLocale()
          Provides the locale to display server implementations as needed to retrieve localized resources for presentation.
 java.lang.Object getObserver()
          An observer is typically associated with certain device types to aid in image loading and image metadata retrieval.
 Size getSize(java.lang.Object oImage)
          Returns the size(width, height) of the device specific image that was previously loaded by the loadImage(URL) method
 ITextMetrics getTextMetrics(Label la)
          An instance of a text metrics computation class capable of providing text metric information associated with a given Label to aid in typically computing the size of rendered text
 ITextMetrics getTextMetrics(Label la, boolean autoReuse)
          An instance of a text metrics computation class capable of providing text metric information associated with a given Label to aid in typically computing the size of rendered text
 com.ibm.icu.util.ULocale getULocale()
          Provides the locale to display server implementations as needed to retrieve localized resources for presentation.
 java.lang.Object loadImage(java.net.URL url)
          Attempts to use device specific libraries to load an image for use with the device renderer
 void logCreation(java.lang.Object oMisc)
          Log creation of a resource for which leaks are to be tracked
 void setDpiResolution(int dpi)
          Sets the dpi resolution.
 void setGraphicsContext(java.lang.Object graphicContext)
          Set the graphic context on the device renderer, which is required for font computations (SWT uses org.eclipse.swt.graphics.GC and Swing uses java.awt.Graphics2D) It is the responsibility of the caller to dispose the Graphics Context
 void setLocale(com.ibm.icu.util.ULocale lcl)
          A convenience method provided to associate a locale with a display server
 void setResourceFinder(IResourceFinder resourceFinder)
          Set the resource finder, which will be used by loading image.
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DisplayAdapter

public DisplayAdapter()
Method Detail

debug

public void debug()
Description copied from interface: IDisplayServer
Lists out all resources that were previously logged explicitly by the logCreation(Object) method or those internally created by each of the resource creation methods. Once this method is invoked, all entries written into the log should be flushed.

Specified by:
debug in interface IDisplayServer

logCreation

public void logCreation(java.lang.Object oMisc)
Description copied from interface: IDisplayServer
Log creation of a resource for which leaks are to be tracked

Specified by:
logCreation in interface IDisplayServer
Parameters:
oMisc - A device-specific object being created

createFont

public java.lang.Object createFont(FontDefinition fd)
Description copied from interface: IDisplayServer
Attempts to create a new font resource associated with a specific device for use in rendering or computations

Specified by:
createFont in interface IDisplayServer
Parameters:
fd - An font description for which a device specific resource is being requested
Returns:
A device specific font

getColor

public java.lang.Object getColor(ColorDefinition cd)
Description copied from interface: IDisplayServer
Attempts to create a new color resource associated with a specific device

Specified by:
getColor in interface IDisplayServer
Parameters:
cd - A color description for which a device specific resource is being requested
Returns:
A device specific color

getDpiResolution

public int getDpiResolution()
Description copied from interface: IDisplayServer
Returns the resolution of the device in dots per inch As an example, for a display screen, the dots correspond to pixels and a typical value for a Win32 OS is 96 DPI.

Specified by:
getDpiResolution in interface IDisplayServer
Returns:
The integral dots per inch associated with the device

setDpiResolution

public void setDpiResolution(int dpi)
Description copied from interface: IDisplayServer
Sets the dpi resolution. This defines how many dots per inch to use for rendering the chart. This is optional, the display server will compute the default dpi resolution of the display where the chart is rendered. It is mostly intended to be used for creating high resolution images.

Specified by:
setDpiResolution in interface IDisplayServer
Parameters:
dpi - The number of dots per inch

loadImage

public java.lang.Object loadImage(java.net.URL url)
                           throws ChartException
Description copied from interface: IDisplayServer
Attempts to use device specific libraries to load an image for use with the device renderer

Specified by:
loadImage in interface IDisplayServer
Parameters:
url - The URL associated with the image location
Returns:
An instance of an image associated with the specified URL
Throws:
ChartException

getSize

public Size getSize(java.lang.Object oImage)
Description copied from interface: IDisplayServer
Returns the size(width, height) of the device specific image that was previously loaded by the loadImage(URL) method

Specified by:
getSize in interface IDisplayServer
Parameters:
oImage - The image for which the size is being requested
Returns:
The size of the image

getObserver

public java.lang.Object getObserver()
Description copied from interface: IDisplayServer
An observer is typically associated with certain device types to aid in image loading and image metadata retrieval.

Specified by:
getObserver in interface IDisplayServer
Returns:
An image observer associated with a specific device renderer

getTextMetrics

public ITextMetrics getTextMetrics(Label la)
Description copied from interface: IDisplayServer
An instance of a text metrics computation class capable of providing text metric information associated with a given Label to aid in typically computing the size of rendered text

Specified by:
getTextMetrics in interface IDisplayServer
Parameters:
la - The Label instance for which text metrics are being requested
Returns:
Text metrics associated with the specified Label instance

getLocale

public final java.util.Locale getLocale()
Description copied from interface: IDisplayServer
Provides the locale to display server implementations as needed to retrieve localized resources for presentation.

Specified by:
getLocale in interface IDisplayServer
Returns:
locale

getULocale

public final com.ibm.icu.util.ULocale getULocale()
Description copied from interface: IDisplayServer
Provides the locale to display server implementations as needed to retrieve localized resources for presentation.

Specified by:
getULocale in interface IDisplayServer
Returns:
ulocale

setLocale

public final void setLocale(com.ibm.icu.util.ULocale lcl)
A convenience method provided to associate a locale with a display server

Parameters:
lcl - The locale to be set

dispose

public void dispose()
Description copied from interface: IDisplayServer
A notification sent to the device to free all allocated system resources.

Specified by:
dispose in interface IDisplayServer

setGraphicsContext

public void setGraphicsContext(java.lang.Object graphicContext)
Description copied from interface: IDisplayServer
Set the graphic context on the device renderer, which is required for font computations (SWT uses org.eclipse.swt.graphics.GC and Swing uses java.awt.Graphics2D) It is the responsibility of the caller to dispose the Graphics Context

Specified by:
setGraphicsContext in interface IDisplayServer

setResourceFinder

public void setResourceFinder(IResourceFinder resourceFinder)
Description copied from interface: IDisplayServer
Set the resource finder, which will be used by loading image. If the chart is not running in stand alone mode, the ChartReportItemImpl will be set, which will resuse the find resource of the report engine, and feature like resource folder will be supported.

Specified by:
setResourceFinder in interface IDisplayServer

getTextMetrics

public ITextMetrics getTextMetrics(Label la,
                                   boolean autoReuse)
Description copied from interface: IDisplayServer
An instance of a text metrics computation class capable of providing text metric information associated with a given Label to aid in typically computing the size of rendered text

Specified by:
getTextMetrics in interface IDisplayServer
Parameters:
la - The Label instance for which text metrics are being requested
Returns:
Text metrics associated with the specified Label instance


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