> I looked at the source code today. I am curious, does the > RenderingManager use ContentIDs to identify the type Renderer > that should be used with each layer?
Yup - a content ID is just the name of the transparent image - either a layer name, or "SELECTION_HANDLES", or "SCALE_BAR", etc. > You mentioned that "the LayerViewPanel's RenderingManager > maintains several transparent images (one for each layer, > then one for the yellow selection handles, and maybe a couple more)." > > I think this is the ImageCachingRenderer and > ImageCachingFeatureCollectionRenderer classes. Yep > I may just have to render the graphics to an offscreen image > after the graphics have been painted to the LayerViewPanel. > The downside of this is that I'll have to paint the grpahics > twice. I really wanted to snag the image that was already > generated by the Java2D framework and painted on the screen. Yeah you might be able to grab that image from the "cache" in the ImageCachingRenderers. Or more precisely, images (plural) - one for each layer. Jon > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On > Behalf Of Sunburned Surveyor > Sent: Friday, November 10, 2006 8:44 PM > To: List for discussion of JPP development and use. > Subject: Re: [JPP-Devel] Snagging a "snapshot" of the LayerViewPanel > > > "Or you could adopt the strategy that several CursorTools use > and simply draw your lines in XOR." > > Yeah, but that would be to easy. :] > > Thanks for taking the time to respond Jon. I'm actually > thinking beyond CursorTools, and exploring ideas for drawing > temporary graphics on the LayerViewPanel. I guess I'm wanting > to get better acquainted with OpenJUMP's rendering system. > > I acutally reviewed an e-mail from you from many months ago. > I had asked some questions about JUMP's rendering system. You > outlined the basic steps in the rendering process. I wasn't > able to understand it from the source code at the time. At > any rate, I found your e-mail still very helpful, and now > that I've become more adept at reading other's Java code I > think I'm getting a fuzzy picture of how OpenJUMP's rendering works. > > I looked at the source code today. I am curious, does the > RenderingManager use ContentIDs to identify the type Renderer > that should be used with each layer? I know it has been a > long time for you. If you don't remember I'll look at the > code some more. > > You mentioned that "the LayerViewPanel's RenderingManager > maintains several transparent images (one for each layer, > then one for the yellow selection handles, and maybe a couple more)." > > I think this is the ImageCachingRenderer and > ImageCachingFeatureCollectionRenderer classes. > > I may just have to render the graphics to an offscreen image > after the graphics have been painted to the LayerViewPanel. > The downside of this is that I'll have to paint the grpahics > twice. I really wanted to snag the image that was already > generated by the Java2D framework and painted on the screen. > > I'll do some more digging. I might post a question on the > uDig mailing list, and on a Java forum I use. > > Thanks again for all of the help Jon. I'm really glad you > keep a half an ear on our list still. :] I hope you are doing well. > > The Sunburned Surveyor > > On 11/10/06, Jonathan Aquino <[EMAIL PROTECTED]> wrote: > > I think there's a "Copy Image" menu in there somewhere. Or was. > > > > The LayerViewPanel's RenderingManager maintains several transparent > > images (one for each layer, then one for the yellow > selection handles, > > and maybe a couple more). So you could add another image > ("Renderable" > > I think they're called), or do it manually using the same technique. > > > > Or you could adopt the strategy that several CursorTools use and > > simply draw your lines in XOR. > > > > Jon > > > > > > > > > -----Original Message----- > > > From: [EMAIL PROTECTED] > > > [mailto:[EMAIL PROTECTED] > On Behalf Of > > > Sunburned Surveyor > > > Sent: Friday, November 10, 2006 2:26 PM > > > To: JUMP Developers; List for discussion of JPP > development and use. > > > Subject: [JPP-Devel] Snagging a "snapshot" of the LayerViewPanel > > > > > > > > > I'm stuck on a small challenge with JUMP/OpenJUMP and I > was hoping > > > one of you guys might be able to save me some time > beating my head > > > on the concrete. > > > > > > What is the quickest way to snag a "snapshot" image of > the contents > > > of the LayerViewPanel? I looked at the LayerViewPanel class, and > > > both of its superclasses Component and JComponent, but I couldn't > > > figure out how to do this. (I don't want to render all of the > > > geometries to an offscreen image. Instead I'd like to > snag the image > > > that has already been computed to paint the image on the > screen in > > > the program.) > > > > > > Also, is there a way to repaint the LayerViewPanel by > passing it an > > > image? > > > > > > I'm working on a way to speed up the rendering of the > LayerViewPanel > > > when the user is using a CursorTool. I'll post my thoughts to the > > > OpenJUMP blog when I find an anwer to this question. > > > > > > Thanks, > > > > > > The Sunburned Surveyor > > > > > > -------------------------------------------------------------- > > > ----------- > > > Using Tomcat but need to do more? Need to support web services, > > > security? Get stuff done quickly with pre-integrated > technology to > > > make your job easier Download IBM WebSphere Application Server > > > v.1.0.1 based on Apache Geronimo > > > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&; > > dat=121642 > > _______________________________________________ > > Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > > > > > > ---------------------------------------------------------------------- > > --- > > Using Tomcat but need to do more? Need to support web > services, security? > > Get stuff done quickly with pre-integrated technology to > make your job easier > > Download IBM WebSphere Application Server v.1.0.1 based on > Apache Geronimo > > > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&; dat=121642 > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
