[OpenLayers-Users] rules depending on state

[Eric Lemoine]

Andreas actually did the initial review.

2008/5/20, Pierre GIRAUD <bluecarto at gmail.com>:
> Hi Tim,
>
> The last Andreas' proposal was put into a patch I commit yesterday.
> http://trac.openlayers.org/changeset/7216
>
> Eric reviewed this but you can still have a look and scream if you don't
> agree.
>
> Regards,
> Pierre
>
> On Mon, May 19, 2008 at 9:39 PM, Tim Schaub <tschaub at opengeo.org> wrote:
>> Pierre GIRAUD wrote:
>>> Yep,
>>> I already tried that and this works great.
>>> However, what if I want to set fillColor, strokeColor, fillOpacity and
>>> strokeOpacity at the same time ? This is really painful.
>>> And it seems like I need to provide a valid value for each possible
>>> value of state. Default style won't be applied to features that aren't
>>> in the switch cases.
>>>
>>> I would prefer something like :
>>> var lookup = {
>>>     'Insert': {
>>>         fillColor: 'green',
>>>         fillOpacity: 0.5
>>>     },
>>>     ...
>>> };
>>>
>>
>> Yes, you're right, you need a different function for each symbolizer
>> property.  However, it shouldn't be too painful.
>>
>> function getValue(state, key) {
>>     var value = lookup[state][key];
>>     if(value == undefined) {
>>         value = defaultSymbolizer[key];
>>     }
>>     return value;
>> }
>> var context = {
>>     getFillColor: function(feature) {
>>         return getValue(feature.state, "fillColor");
>>     },
>>     ...
>> };
>>
>> Wouldn't be too hard to allow the symbolizer to be a function.  This
>> function would be called for each feature and would return a symbolizer.
>>  In fact, this seems more intuitive than the style context stuff.
>>
>> The style stuff can be made less twisted in OL3.
>>
>> Tim
>>
>>
>>> Regards,
>>> Pierre
>>>
>>>
>>> On Tue, May 13, 2008 at 4:35 PM, Andreas Hocevar
>>> <andreas.hocevar at gmail.com> wrote:
>>>> Hey Pierre,
>>>>
>>>>  without having tried, something like the following should work:
>>>>
>>>>  var context = {
>>>>    getStateColor: function(feature) {
>>>>        switch(feature.state) {
>>>>            case "Insert": return "green";
>>>>            case "Update": return "yellow";
>>>>            case "Delete": retrun "red";
>>>>        }
>>>>    }
>>>>  }
>>>>
>>>>  var styleMap = new OpenLayers.StyleMap(new OpenLayers.Style({
>>>>    strokeColor: "${getStateColor}"
>>>>  }, {context: context}));
>>>>
>>>>  Regards,
>>>>  Andreas.
>>>>
>>>>
>>>>  Pierre GIRAUD wrote:
>>>>
>>>>>
>>>>>
>>>>> Hello OpenLayers styleMap gurus,
>>>>>
>>>>> I would like to have different symbolizers for the features depending
>>>>> on their state property.
>>>>> The addUniqueValueRules would look perfect for that but the context of
>>>>> the generated rules is feature.attributes. The state will not be
>>>>> evaluated because it's not one of those attributes.
>>>>>
>>>>> Has anyone a workaround to advice ?
>>>>>
>>>>> Regards,
>>>>>
>>>>> Pierre
>>>>> _______________________________________________
>>>>> Users mailing list
>>>>> Users at openlayers.org
>>>>> http://openlayers.org/mailman/listinfo/users
>>>>>
>>>>>
>>>>
>>> _______________________________________________
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>>> Users at openlayers.org
>>> http://openlayers.org/mailman/listinfo/users
>>>
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>>>
>>
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