Locator appearance
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From: Alexei Boulbitch on 14 Apr 2010 23:37 Dear community, I use Locator to pick up some points of the graph originated form experiment. In this case I would like to slightly modify the Locator appearance, since the gray ring on its background sometimes prevents me from seeing the point I want to pick up. I would like to leave its cross structure as it is at present, but to remove the gray ring. As an alternative, the inned (and may be, the outer) diameter of the gray ring could be increased. Do you have any idea of how to do this? Best regards, Alexei -- Alexei Boulbitch, Dr., habil. Senior Scientist IEE S.A. ZAE Weiergewan 11, rue Edmond Reuter L-5326 Contern Luxembourg Phone: +352 2454 2566 Fax: +352 2454 3566 Website: www.iee.lu This e-mail may contain trade secrets or privileged, undisclosed or otherwise confidential information. If you are not the intended recipient and have received this e-mail in error, you are hereby notified that any review, copying or distribution of it is strictly prohibited. Please inform us immediately and destroy the original transmittal from your system. Thank you for your co-operation.
From: David Park on 16 Apr 2010 05:50 You could use the DrawingTools crosshairs to select and copy points off a graph. If you want to write your own dynamic presentation, you could create your own locator by writing a Graphics statement as the second argument to the Locator statement. With your copy of Presentations you could use the CirclePointLocator statement to create a better looking and smaller locator. It is contained in the PlaneGeometry section and there is also a step-by-step tutorial on constructing custom dynamic presentations. You could display the underlying graphics and then have a point locator that simultaneously displayed computed values from its location. The WRI militaristic gun-sight locator isn't the best looking and the cross hairs don't seem to be perfectly centered anyway, so I would do away with them but in any case you can always define your own locator. One other point is that the ImageSize of the locator graphic determines the cursor "capture area" for the locator. David Park djmpark(a)comcast.net http://home.comcast.net/~djmpark/ From: Alexei Boulbitch [mailto:Alexei.Boulbitch(a)iee.lu] Dear community, I use Locator to pick up some points of the graph originated form experiment. In this case I would like to slightly modify the Locator appearance, since the gray ring on its background sometimes prevents me from seeing the point I want to pick up. I would like to leave its cross structure as it is at present, but to remove the gray ring. As an alternative, the inned (and may be, the outer) diameter of the gray ring could be increased. Do you have any idea of how to do this? Best regards, Alexei -- Alexei Boulbitch, Dr., habil. Senior Scientist IEE S.A. ZAE Weiergewan 11, rue Edmond Reuter L-5326 Contern Luxembourg Phone: +352 2454 2566 Fax: +352 2454 3566 Website: www.iee.lu This e-mail may contain trade secrets or privileged, undisclosed or otherwise confidential information. If you are not the intended recipient and have received this e-mail in error, you are hereby notified that any review, copying or distribution of it is strictly prohibited. Please inform us immediately and destroy the original transmittal from your system. Thank you for your co-operation.
From: Albert Retey on 16 Apr 2010 05:53
Am 15.04.2010 05:37, schrieb Alexei Boulbitch: > Dear community, > > I use Locator to pick up some points of the graph originated form > experiment. In this case I would like to slightly modify the Locator > appearance, since the gray ring on its background sometimes prevents me > from seeing the point I want to pick up. I would like to leave its cross > structure as it is at present, but to remove the gray ring. As an > alternative, the inned (and may be, the outer) diameter of the gray ring > could be increased. > > Do you have any idea of how to do this? >From the usage message: Locator[{x,y},obj] displays obj as the locator object. you can use an graphics as a locator, but I don't think that you can just change the appearance (except for the overall size) as you have asked. Graphics[{Locator[Dynamic[x], Graphics[{Line[{{{-1, 0}, {1, 0}}, {{0, -1}, {0, 1}}}]}, ImageSize -> 15]]}, Frame -> True, PlotRange -> 1 ] hth, albert |