[GRASS-dev] Re: wxGUI: MapDisplay mouse events

[Wenzeslaus]

Yes, right. However you don't know when mouse button was released (in
the case of mouse leftup event). In order to know when this happens
registering (binding) of callback (handler) is necessary. Binding and
unbindig (which is also useful) was not possible with existing public
API.

Without binding user have to - after click on MapDisplay (1) - click
on button in dialog in order to get coordinates to dialog. It works
but it is not much intuitive.

With binding user will first click on button in dialog and coordinates
will appear in dialog immediately after user clicks on MapDisplay. To
implement this behaviour dialog has to listen MapDisplay mouse events.

Vasek

(1) MapDisplay is not the right class name, I mean BufferdWindow or
GLWindow which are childs of MapWindow where the new API is.



On 18 August 2011 21:05, Michael Barton <Michael.Barton at asu.edu> wrote:
> Vasek,
>
> mapdisp_window.mouse['end'] returns a tuple with the window xy coodinates of the mouse click position on a LeftUp event (releasing the mouse button).
>
> mapdisp_window.Pixel2Cell(self.mouse['end']) will return a tuple with the geographic xy coordinates of the mouse click position.
>
> No need to edit mapdisp_window.py
>
> Getting the 3D coordinates is different.
>
> Michael
> ____________________
> C. Michael Barton
> Director, Center for Social Dynamics & Complexity
> Professor of Anthropology, School of Human Evolution & Social Change
> Arizona State University
>
> voice:  480-965-6262 (SHESC), 480-727-9746 (CSDC)
> fax:          480-965-7671 (SHESC),  480-727-0709 (CSDC)
> www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu
>
>
> On Aug 18, 2011, at 12:57 AM, Wenzeslaus wrote:
>
>> Michael,
>>
>> as far as I know, now if you want to get mouse click coordinates from
>> MapDisplay (MapWindow) you have to edit file mapdisp_window.py (for 2D
>> mode) and nviz_mapdisp.py (if you also want coordinates from 3D).
>>
>> With my suggested API there is no need to edit these 'core files'. You
>> simply register your handler. And it can be done even if you are
>> writing a addon and you can not change 'core files'.
>>
>> I don't think that we should change existing code. Some functions
>> (features) are very connected to MapWindow and very complex and
>> writing code just into 'core files' is the best solution. But in my
>> opinion suggested API is the best solution for simple tasks like 'get
>> mouse click coordinates to MyDialog'.
>>
>> Vasek
>>
>>
>> On 17 August 2011 23:21, Michael Barton <Michael.Barton at asu.edu> wrote:
>>> I need to look at this in more detail, but at first glance, it add another method that does things that are already done by other methods.
>>>
>>> Michael
>>> ______________________________
>>> C. Michael Barton
>>> Director, Center for Social Dynamics & Complexity
>>> Professor of Anthropology, School of Human Evolution & Social Change
>>> Arizona State University
>>> Tempe, AZ  85287-2402
>>> USA
>>>
>>> voice:  480-965-6262 (SHESC), 480-727-9746 (CSDC)
>>> fax:          480-965-7671(SHESC), 480-727-0709 (CSDC)
>>> www:    http://csdc.asu.edu, http://shesc.asu.edu
>>>                http://www.public.asu.edu/~cmbarton
>>>
>>> On Aug 17, 2011, at 2:13 PM, Wenzeslaus wrote:
>>>
>>>> Hi Michael,
>>>>
>>>> it is file with patch
>>>> mapdisplay_mouse_events.diff
>>>> and simple example how to use API also in diff file
>>>> mapdisplay_mouse_events_example.diff
>>>>
>>>> I'm not sure why, but mailing list thinks that MIME type text/x-patch
>>>> is a binary file. Then it produces the text and links you see. Some
>>>> mail clients can handle it and instead of links they displays
>>>> attachments but some cannot.
>>>>
>>>> I don't understand it completely and I don't know how to avoid it.
>>>> I'll try to attach the patch with txt suffix to find out how it works.
>>>>
>>>> Vasek
>>>>
>>>>
>>>> On 17 August 2011 20:06, Michael Barton <michael.barton at asu.edu> wrote:
>>>>> Vasek,
>>>>>
>>>>> What are the *.bin files that download from your html links?
>>>>>
>>>>> Michael
>>>> <mapdisplay_mouse_events.txt>
>>>
>>>
>
>