[OpenLayers-Dev] [OpenLayers-Users] Hover control sample (share)

[Ivan Grcic]

Hi Alex,

dont have it with me now, but I remember i wrote here my first idea
http://trac.openlayers.org/ticket/1596

...i think i made it little different at the end....but similar. Will
let you know tomorrow.

Cheers



On Tue, Jan 20, 2009 at 2:41 PM, Alexandre Dube <adube at mapgears.com> wrote:
> Hi Ivan, Eric,
>
>  I was actually thinking a similar idea.  The more I thought about it, the
> more I thought about copying/pasting the SelectFeature control, make some
> changes to the copy and name it HighlightFeature.  But Eric's idea is much
> better.
>
>  Having the control itself know which feature it has selected + having its
> own events could enable the possibility of having multiple SelectFeature
> controls for a single layer.  Having both selecting on hover and/or click
> won't matter except for the style and the renderIntent applied to the
> selected feature.  I guess the last declared control would have the last
> word of determining those...
>
>  About that, what if we want 2 different colors for each ctrl ?  Having 2
> selectfeature ctrls doing the same thing ( hover and click ) is not very
> logic, but let's say one select on hover, the other on click, it would be
> nice be able to have 2 different styles for each action.  But how could we
> do that ? (I guess I don't fully understand the whole renderIntent stuff
> yet...  Could we specify a specific renderIntent for the selectFeature ?
>  Could "select" be the default value and we could be able to set our own ?)
>  To do so without changing the renderIntent of the feature is to change its
> style only, without selecting it.
>
>  Ivan's idea (selectOnHover:false) sounds good.  I'd like to see the code
> and try it.  Ivan, could you share what you've done ?  At the same time, I'd
> like to try to add events to the control and its selectedFeatures array,
> like Eric said.
>
>  Finally, I would like to know more about what you think about all this.
>
> Best regards,
>
> Alexandre
>
> Ivan Grcic wrote:
>>
>> On Mon, Jan 19, 2009 at 10:19 PM, Eric Lemoine <eric.c2c at gmail.com> wrote:
>>
>>>
>>> On Mon, Jan 19, 2009 at 3:30 PM, Alexandre Dube <adube at mapgears.com>
>>> wrote:
>>>
>>>>
>>>> Hi Eric,
>>>>
>>>>  I took a look at the SelectFeature control.  Now I understand what you
>>>> meant and it makes sense.  Also, it's also making sense to have this
>>>> control
>>>> have the possibility to highlight on hover or on click.
>>>>
>>>>  "beforefeaturehighlighted" and "featurehighlighted" events make sense,
>>>> but
>>>> a "featureunhighlighted" (or some other term meaning that the feature
>>>> was
>>>> highlighted and is now no more) would also be useful.
>>>>
>>>
>>> Alexandre,
>>>
>>> The more I think about this highlight feature control the more I think
>>> there's no room for both a select feature and a highlight feature
>>> controls.
>>>
>>>
>>
>> Same opinion here. We already have a bunch of controls, and now adding
>> two very similar ones...
>>
>> Currently im using slightly modified SelectFeature control, i added
>> one more option to it: selectOnHover, thats how i quickly solved the
>> problem of only highlighting feature without selecting it.
>>
>> If selectOnHover is true, feature is selected&higlighted (select
>> method is called) on hover, if its false feature is only higlighted,
>> not selected.
>>
>>
>>>
>>> What causes people trouble is that they can't use two select feature
>>> controls, one in hover mode and the other in click mode. This is
>>> because once a feature is hovered it is selected, and cannot be
>>> selected again when it is clicked.
>>>
>>> Maybe we could modify the select feature control so that (1) it
>>> optionally uses its own selectedFeatures array, as opposed to relying
>>> on the layer's, and (b) defines its own "beforefeatureselected",
>>> "featureselected" and "featureunselected" event types. In this way,
>>> one should be able to use two select feature controls, and get
>>> "featureselected" events, from the first control when features are
>>> hovered and from the second control when features are clicked.
>>>
>>> Tell me what you think,
>>>
>>>
>>
>>
>>>
>>> --
>>> Eric
>>> _______________________________________________
>>> Users mailing list
>>> Users at openlayers.org
>>> http://openlayers.org/mailman/listinfo/users
>>>
>>>
>>
>>
>>
>>
>
>
> --
> Alexandre Dubé
> Mapgears
> www.mapgears.com
>
>



-- 
Ivan Grcic