XY Graph Zoom Mouse Wheel

I'm developping a very lightweight world map on XY graph. The attached VIs are LV8.0.
It almost works but I dont understand why it's not stable as you can notice by running worldmap.vi with zoom.vi as subvi. Your mouse wheel should zoom in, zoom out the graph's limits... I dont understand why it doesnt change X and Y ranges simultaneously... And the position of the mouse should stay on the same position of the world map, after zooming.
I realize that my comment is not really clear, you can try it and suggest what I should change, I'm using LV8.6, you dont have to spend time to save for LV8.0
Post question I should reply quickly.
Regards,
Jimmy
Attachments:
worldmap.zip ‏364 KB

The problem isn't with the notifier mechanism (although that code can be simplified). The problem is with the way you're calculating the new ranges and increments. When the calculations are done the proportions of the graph are not kept consistent, thereby causing a stretching of the "figure". Also, you are not putting a limit on the XScale.Increment and YScale.Increment such as when you hit the max/min scale ranges. This means that you can continue to "zoom out", with no chance in the scale, but the increment values keep increasing. This throws off the calculations when you try to "zoom back in".
My suggestion for using the picture indicator was not to try to draw 70,000 points. This would be way too slow. Rather, read in an image of the world to get drawn onto a picture indicator and then draw the axes over it. I don't know what your eventual goal is, so I don't know if this is a more suitable method.

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<blockquote>Locking duplicate thread.<br>
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P.S. Zero-coordinates are marked in the frontpanel:
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Attachments:
Mouse Wheel Coords.vi ‏10 KB

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[http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6516675|http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6516675]
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[In case it does not work, click on 'Click Me' button and try]
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
* @author mrityunjoy_saha
public class TestApplet extends JApplet {
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Is rubbish. Cmon abode, its not rocket science. Or maybe I'm doing wrong -
Is there any other way to scroll audio and video layers other than with the scrollbar? If not here are some no brainer suggestions:
existing: scroll along timeline with mouse wheel. If you're at all zoomed in its far too slow, so
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Modifiers are your friend:
Shift scroll to actually scroll up and down layers (I would use this massively more than moving along timeline).
ad ctrl to the mix so that it speeds up scrolling or zooming:
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ctrl-alt-scroll 5 times as much zooming.
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Like finding an asset in explorer. I do this a lot in bridge, dreamweaver, indesign, lightroom and I have to look for, to name a few
Explore
Reveal in explorer
Show in explorer...
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getho wrote:
" Cmon abode, its not rocket science."
I'm sorry, we categorically refute your suggestions if you spell our name wrong.
All kidding aside, I like the mouse wheel down (or middle button) acting as a hand scroll mode. BTW, just in case, if you didn't know already, alt + mouse wheel performs zoom in/out around the cursor's position. (I personally wish this was the default, and the scroll horizontal/vertical was the alt option, but that's just me.)
Whatever you do, please make sure that you submit these here.
Cheers

XY Graph Zoom Mouse Wheel

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