[GRASSGUI] Re: opacityDialog

[Michael Barton]

Can we wrap it into a properties dialog for d.* commands? (copying Daniel on
this). 

Michael




On 5/25/07 6:00 AM, "Martin Landa" <landa.martin at gmail.com> wrote:

> Michael,
> 
> 2007/5/23, Michael Barton <michael.barton at asu.edu>:
>> I did try that and here's why I went to a spinner.
>> 
>> I like sliders. But...the slider looks bad (doesn't format quite right) and
>> takes up a lot of room (at least on my Mac version) when used in a
>> customtreectrl.
>> 
>> I love contextual menus, but strongly resist putting something there that is
>> not also available elsewhere (i.e., with a left mouse click). To do
>> otherwise means that it is visually hidden and the user has to know that it
>> exists a priori in order to use that feature. To the best of my knowledge,
>> this is contrary to standard interface guidelines.
>> 
>> So this would mean putting an 'opacity' popup button somewhere--either in
>> the properties dialog or in the tree item line and then creating a text
>> object that would need to be updated dynamically every time the opacity
>> control is changed. I decided that a spinner was easier to implement than a
>> button and some kind of text that would need to be updated (always tricky).
>> It offers direct user access to the function. You can type or spin, it
>> offers direct user feedback to the state of opacity without any updating
>> code.
> 
> OK, on the other hand I feel wx.SpinCtrl in layer tree as a
> "disturbing" feature. I think there is  place only for 'layer name'
> and checkbox (enable/disable). The widget for setting transparency can
> be hidden somewhere I guess (it is just property of layer). Moreover
> it is sometimes buggy (see the screenshot).
> 
> Anyway it would be great to add transparency support to GRASS display
> architecture (then it could be available from d.rast GUI form). (?)
> 
> Martin

__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Center for Social Dynamics and Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton