[program-java] Re: Converting java.awt.Graphics2D graphics to an SWT Display format
- From: Willem Venter <dwillemv@xxxxxxxxx>
- To: program-java@xxxxxxxxxxxxx
- Date: Fri, 6 Jan 2012 22:52:18 +0200
Hello.
As far as I know eclipse is written in swt and it is mostly
accessible. Which parts of swt is inaccessible? As you can probably
deduce I don't know much about swt, so excuse my ignorance.
On 12/31/11, Richard Baldwin <baldwin@xxxxxxxxxxxxxxx> wrote:
> Thousands of programs and several complete libraries have been published
> that use Sun's java.awt.Graphics2D class for the creation of graphic
> information. I am personally responsible for publishing a few hundred of
> those programs myself.
>
> For reasons of accessibility, I am now programming using the SWT. I am
> searching for a relatively painless way to convert programs that have been
> developed using Sun's java.awt.Graphics2D class to a display format that
> can be used with SWT.
>
> ALTERNATIVE #1
> On the Sun Java side, I can create an off-screen image of type
> java.awt.Image and use any of the methods of the class named
> java.awt.Graphics2D to draw or otherwise deposit pictures onto the Image
> object. Normally then, I would call the drawImage method of the Graphics2D
> class in an overridden paint method to draw that image onto a
> java.awt.Canvas object for display in a java.awt.Frame or
> javax.swing.JFrame object.
>
> On the SWT Java side, apparently if I have an
> org.eclipse.swt.graphics.Image object, I can call the drawImage method of
> the GC class to display that image in a manner that is acceptable to SWT
> with no requirement for a java.awt.Frame object or a javax.swing.JFrame
> object.
>
> Question: How can I transfer the image from a java.awt.Image object to an
> org.eclipse.swt.graphics.Image object? A single method that receives
> references to one object of each type and makes the transfer would be very
> useful.
>
> OTHER ALTERNATIVES
> Question: Other than using code such as the following, does anyone know of
> a relatively painless way to convert programs that have been developed
> using Sun's Graphics2D class to a display format that can be used with SWT.
>
> Composite comp = new Composite(drawingShell,SWT.EMBEDDED);
> java.awt.Frame frame = SWT_AWT.new_Frame(comp);
>
> In other words, how can I take advantage of Sun's Graphics2D API without
> including a java.awt.Frame object in my SWT program?
>
> Thanks,
> Dick Baldwin
>
> --
> Richard G. Baldwin (Dick Baldwin)
> Home of Baldwin's on-line Java Tutorials
> http://www.DickBaldwin.com
>
> Professor of Computer Information Technology
> Austin Community College
> (512) 223-4758
> mailto:Baldwin@xxxxxxxxxxxxxxx
> http://www.austincc.edu/baldwin/
>
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