Thanks Stephane,
I thought of the first idea also but the second looks more promising.
I'll give that a try.
Thanks
Frank
Stéphane WASSERHARDT wrote:
> Hi Frank,
>
> Here are two ideas:
> 1) Resize your MapBean to the desired size and make an offscreen image. You
> can achieve this by overriding BasicMapPanel, and putting the MapBean into a
> JScrollPane. You'll have to disable scrolling for a "normal use".
> When you need to create an offscreen image, you just have to activate
> scrolling, resize your MapBean, update your projection, create the image,
> and then restore the previous state :
>
> // Something like :
> Dimension desiredSize = ...;
> mapBean.setPreferedSize(desiredSize);
> Proj proj = (Proj) getProjection().makeClone();
> proj.setWidth(desiredSize.width);
> proj.setHeight(desiredSize.height);
> mapBean.setProjection(proj);
> // Then create an offscreen image
>
> Be carefull to wait for all layers to be repainted before creating the
> image! You can use renderDataForProjection as in the second solution to
> avoid threading problems.
>
> This method works but you may have no interest in "physically" resizing the
> MapBean. So the second idea should be better for you:
>
> 2) Use renderDataForProjection using a projection object built from code.
> This is the same as the first idea, but you won't have to change the mapBean
> (and the MapPanel).
>
> // The code will be something like the following :
> // (didn't try it, but this may work with little changes)
>
> Dimension desiredSize = ...;
> Proj proj = (Proj) getProjection().makeClone();
> proj.setWidth(desiredSize.width);
> proj.setHeight(desiredSize.height);
>
> BufferedImage image = new BufferedImage(desiredSize.width,
> desiredSize.height, BufferedImage.TYPE_INT_ARGB);
>
> LayerHandler lh = (LayerHandler) getBeanContext().get(LayerHandler.class);
> Layer[] layers = lh.getMapLayers();
> for (int i = 0; i < layers.length; i++) {
> layer[i].renderDataForProjection(proj, image.getGraphics());
> }
>
> // "image" should now contain what you want...
>
>
> I know that both ideas work:
> I used the first to let users choose an "export resolution" and preview it
> directly on the map frame, and I used the second in order to generate images
> without having any MapBean...
>
> I hope this helps!
>
> Regards,
> Stephane
>
> -----Message d'origine-----
> De : owner-openmap-users_at_bbn.com [mailto:owner-openmap-users_at_bbn.com] De la
> part de F.Bayliss
> Envoyé : vendredi 29 juin 2007 16:59
> À : openmap-users_at_bbn.com
> Objet : [OpenMap Users] creating an off screen image
>
> Hello,
>
> Here's a tough one...
>
> I want to create an image 3 times the size the current buffered map bean
> and draw the layers into it so that when the image is displayed or
> printed it looks just like the app would if it was three time the size.
> Any suggestions how?
>
> Thanks
> Frank
>
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Received on Mon Jul 02 2007 - 05:48:36 EDT