Setting changed viewport

Question

I have a JScrollPane with a JPanel inside. I zoom in on the panel by scaling the painted parts by 1/zoom and scale the size of the panel by zoom (zoom is 1, 2, 4, 8, 16). The actual zooming works fine. The problem comes when trying to zoom in on the correct part of the panel. At the moment I have,
     public void ZoomIn() {
         // set zoom
         currentPaintZoom /= 2.0;
         currentPanelZoom *= 2.0;
         if(currentPanelZoom > maxZoom){
             currentPaintZoom = startZoom/maxZoom;
          currentPanelZoom = maxZoom;
         mainPanel.SetScale(currentPaintZoom);
         // resize panel
         mainPanel.setPreferredSize(
         new Dimension((int)(startSize*currentPanelZoom), panelHeight));
         // set view
         if(currentPaintZoom < maxZoom){          
           tempX = (int)(currView.getX() * 2);
           tempY = (int)currView.getY();        
           currView = new Point(tempX, tempY);
           v = graphScroll.getViewport();
           v.setViewPosition(currView);
           graphScroll.setViewport(v);
         else{
           graphScroll.setViewport(graphScroll.getViewport());
         // make changes
         mainPanel.revalidate();
     public void ZoomOut() {
         // set zoom
         currentPaintZoom *= 2.0;
         currentPanelZoom /= 2.0;
         if(currentPanelZoom < 1.0){
          currentPaintZoom = startZoom;
          currentPanelZoom = 1.0;
         mainPanel.SetScale(currentPaintZoom);
         // resize panel
         mainPanel.setPreferredSize(
         new Dimension((int)(startSize*currentPanelZoom), panelHeight));
         // set view
         if(currentPaintZoom > 1.0){         
           tempX = (int)(currView.getX() / 2);
           tempY = (int)currView.getY();        
           currView = new Point(tempX, tempY);
           v = graphScroll.getViewport();
           v.setViewPosition(currView);
           graphScroll.setViewport(v);
         else{
            graphScroll.setViewport(graphScroll.getViewport());
         // make changes
         mainPanel.revalidate();
     /*---------------------------------------------------------*/Can anyone see why the setting of the scollPane view is incorrect.
Thanks,
Richard.

Answer 1

Thanks for taking the time to answer this question. Knowing this isn't possible at least narrows my options down. It would be helpful to provide some kind of list of what comp settings carry over into AME from After Effects. Is it essentially everything that is enabled in the Timeline? (I know that motion blur settings do.)
I'll put this in a feature request, but yes, we need the other half of After Effects Render Queue in AME in order for AME to be a good replacement for rendering from AE. I'll give you my thoughts on why Render Settings are essential before you would actually want to render with AME instead of doing so because you have to (either because you want to render in the background, or need a codec that has been removed from AE.)
1. Speed: Simply applying a Render Settings preset is much faster than manually setting motion blur, frame blending, work area, etc.
2. Reliability: Not being able to apply a Render Settings preset at the time of render is a recipe for missing a crucial setting buried in a comp, then having to redo a render and wasting time.
3. Features: As noted above, there is no way to approximate Render Queue's ability to change resolutions at render, which results in a lot of wasted time when that feature is needed.
Render Settings I think are crucial to making AME rendering worthwhile for AE users:
1. Rendering resolution
2. Work Area/Entire Composition toggle
3. Field Rendering (wait, does this mean AME can't currently render to fields?)
4. And PRESET ability these settings, so I'm not doing them manually every time.
I realize that your team clearly doesn't spend the same amount of time I do making low res H264 previews and sending final files out in H264 format, so you don't appreciate the impact of the changes you made. Moving to AME for that stuff is a real inconvenience, but implementing the settings above could help soften the blow.
Thanks,
Jerry