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MathGroup Archive 2007

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Re: Re: 6.0 Get Graphics Coordinates...

  • To: mathgroup at smc.vnet.net
  • Subject: [mg77817] Re: [mg77755] Re: 6.0 Get Graphics Coordinates...
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Sun, 17 Jun 2007 06:11:33 -0400 (EDT)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <f4on38$7sg$1@smc.vnet.net> <200706140911.FAA05973@smc.vnet.net> <f4tm2d$ira$1@smc.vnet.net> <200706160724.DAA25722@smc.vnet.net>
  • Reply-to: murray at math.umass.edu

That use of Tooltip merely displays the coordinates of the point.  It 
does not save it in a buffer from which one can later paste it.

David wrote:
> Murray Eisenberg wrote:
>> Useless??  Hardly!  Surely just doing Plot[...] and then Ctrl-clicking 
>> is a lot easier for a beginner (e.g., a student using Mathematica) than 
>> to deal with a Dynamic object.
>>
>> On the other hand, and apart from the issue of what to do with 
>> Ctrl-click when the graphics object is dynamically generated, there 
>> would seem to be a design issue: Now, in 6.0, Ctrl-mouse-button-down is 
>> the start of a zoom-in/zoom-out for a 3D graphic.
>>
>> Jens-Peer Kuska wrote:
>>> Hi,
>>>
>>> it has been droped because it is useless try
>>>
>>> gr = Plot[Sin[x^2], {x, 0, 2 Pi}];
>>>
>>> and
>>>
>>> DynamicModule[{pnt = {0, 0}},
>>>   gr /. Graphics[gg_, opts___] :>
>>>     Graphics[Append[gg, Tooltip[Locator[Dynamic@ pnt], Dynamic@ pnt]],
>>>      Prepend[Prepend[{opts}, PlotLabel -> Dynamic[pnt]],
>>>       AxesLabel -> {Dynamic[First[pnt]], Dynamic[Last[pnt]]}]]
>>>   ]
>>>
>>> and
>>>
>>> DynamicModule[{pts = {{0, 1/2}, {2, 1/2}}}, LocatorPane[Dynamic[pts],
>>>    gr, LocatorAutoCreate -> True]]
>>>
>>> Alt-Mouse click will add points ..
>>>
>>> Regards
>>>    Jens
>>>
>>> roby.nowak at gmail.com wrote:
>>>> hello, what happened to:
>>>> 5.2  Get Graphics Coordinates...
>>>>
>>>> in version 5.2 you could click inside a graphic and when holding down
>>>> the <Ctrl> key the coordinates of the cursor within the graphics would
>>>> be displayed. you could then click with the mouse and every clicked
>>>> position got saved in a buffer. then you could copy and paste the
>>>> saved coordinates as a list of number pairs.
>>>>
>>>> regards robert
>>>>
>>>>
> 
> How about the following simple alternative? It closely approximates the 
> display of points available in pre-6.0, but only shows actual points on 
> the curve (a benefit for me).
> 
> Plot[Tooltip[Sin[x], Dynamic[MousePosition["Graphics"]]], {x, 0, 10}]
> 
> 

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305


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