gwt-openlayers-users

[Gwt-openlayers-users] Zoom proportional point radius and handling both hover and click events at the same time

[Mikael C. <mik...@cl...>]

Hello,


I am working on a project involving GWT-OpenLayers, the project is in its
early phase and I'm currently building a prototype.
I'm using the 0.5 version because I need MapStyles.

I have encountered technical limitations implementing two features, and I
felt I could use your advice :

1) Point radius proportional to the zoom
Here's an example of what I'd like to have :
http://www.palewire.com/openlayers-proportional-symbols/
I guess I could use the zoom listener to implement this behaviour, but it
doesn't seem right. I'd rather delegate this task to OpenLayers. However, I
don't even know if it's possible (Did I mention I'm not very good in
JavaScript and JSNI ?).
I'd be happy to contribute to the project, but I woudn't like to start
anything before asking you guys if it's a good idea.
Maybe I can be more specific in my questions :
 - Is it possible to implement such a behaviour in GWT-OpenLayers without
breaking the design ?
 - How long would it take for a noob to master the art of JSNI enough to do
such a thing ?
 - Where would you start ?

2) Handling both hover events and click events at the same time for vector
features
>From my various tests, I concluded that the only way to trigger a feature
related event is through the SelectFeatureListener. It works great, but in
my case I want to trigger one event when the feature is hovered, and a
second when it is clicked. However, it is not possible because when it is
clicked it has already been selected by the hover.
>From what I've seen from the code and the OpenLayers API, it shouldn't be
too difficult to implement this behaviour using the
SelectFeature.clickFeature() method.
I think I could do it, but if you guys think you can get it done quickly you
might want to consider the option.
What do you say, should I create a Trac ticket and get to it ?

By the way, thanks for the great tool, i'm sure lots of people like me have
found it useful.


-- 
Mikael Couzic

Re: [Gwt-openlayers-users] Zoom proportional point radius and handling both hover and click events at the same time

[Mikael C. <mik...@cl...>]

Hi again,


I've taken it a step further :

1) Point radius proportional to the zoom
After a few tests trying to delegate the functionnality to OpenLayers, I
gave up. The whole thing was gonna end up in really bad design (with Style
instances holding a reference to the Map instance).
I'll just implement the whole thing with a zoom listener.
By doing this, I run into a new feature I'd like to add to GWT-OpenLayers
(being able to define the point radius as a string). I'll create the Trac
ticket.

2) Handling both hover events and click events at the same time for vector
features
In fact it was very easy, I'll create the Trac ticket.

-- 
Mikael Couzic



2009/11/3 Mikael Couzic <mik...@cl...>

> Hello,
>
>
> I am working on a project involving GWT-OpenLayers, the project is in its
> early phase and I'm currently building a prototype.
> I'm using the 0.5 version because I need MapStyles.
>
> I have encountered technical limitations implementing two features, and I
> felt I could use your advice :
>
> 1) Point radius proportional to the zoom
> Here's an example of what I'd like to have :
> http://www.palewire.com/openlayers-proportional-symbols/
> I guess I could use the zoom listener to implement this behaviour, but it
> doesn't seem right. I'd rather delegate this task to OpenLayers. However, I
> don't even know if it's possible (Did I mention I'm not very good in
> JavaScript and JSNI ?).
> I'd be happy to contribute to the project, but I woudn't like to start
> anything before asking you guys if it's a good idea.
> Maybe I can be more specific in my questions :
>  - Is it possible to implement such a behaviour in GWT-OpenLayers without
> breaking the design ?
>  - How long would it take for a noob to master the art of JSNI enough to do
> such a thing ?
>  - Where would you start ?
>
> 2) Handling both hover events and click events at the same time for vector
> features
> From my various tests, I concluded that the only way to trigger a feature
> related event is through the SelectFeatureListener. It works great, but in
> my case I want to trigger one event when the feature is hovered, and a
> second when it is clicked. However, it is not possible because when it is
> clicked it has already been selected by the hover.
> From what I've seen from the code and the OpenLayers API, it shouldn't be
> too difficult to implement this behaviour using the
> SelectFeature.clickFeature() method.
> I think I could do it, but if you guys think you can get it done quickly
> you might want to consider the option.
> What do you say, should I create a Trac ticket and get to it ?
>
> By the way, thanks for the great tool, i'm sure lots of people like me have
> found it useful.
>
>
> --
> Mikael Couzic
>
>

Re: [Gwt-openlayers-users] Zoom proportional point radius and handling both hover and click events at the same time

[Edwin C. <com...@gm...>]

Hi Mikael,

Sorry that I haven't had time to help you out. Thanks for looking into
the issue and contributing source code. I just wanted to let you know
that your contribution is highly appreciated.

Greetings,
Edwin


2009/11/3 Mikael Couzic <mik...@cl...>:
> Hello,
>
>
> I am working on a project involving GWT-OpenLayers, the project is in its
> early phase and I'm currently building a prototype.
> I'm using the 0.5 version because I need MapStyles.
>
> I have encountered technical limitations implementing two features, and I
> felt I could use your advice :
>
> 1) Point radius proportional to the zoom
> Here's an example of what I'd like to have :
> http://www.palewire.com/openlayers-proportional-symbols/
> I guess I could use the zoom listener to implement this behaviour, but it
> doesn't seem right. I'd rather delegate this task to OpenLayers. However, I
> don't even know if it's possible (Did I mention I'm not very good in
> JavaScript and JSNI ?).
> I'd be happy to contribute to the project, but I woudn't like to start
> anything before asking you guys if it's a good idea.
> Maybe I can be more specific in my questions :
>  - Is it possible to implement such a behaviour in GWT-OpenLayers without
> breaking the design ?
>  - How long would it take for a noob to master the art of JSNI enough to do
> such a thing ?
>  - Where would you start ?
>
> 2) Handling both hover events and click events at the same time for vector
> features
> From my various tests, I concluded that the only way to trigger a feature
> related event is through the SelectFeatureListener. It works great, but in
> my case I want to trigger one event when the feature is hovered, and a
> second when it is clicked. However, it is not possible because when it is
> clicked it has already been selected by the hover.
> >From what I've seen from the code and the OpenLayers API, it shouldn't be
> too difficult to implement this behaviour using the
> SelectFeature.clickFeature() method.
> I think I could do it, but if you guys think you can get it done quickly you
> might want to consider the option.
> What do you say, should I create a Trac ticket and get to it ?
>
> By the way, thanks for the great tool, i'm sure lots of people like me have
> found it useful.
>
>
> --
> Mikael Couzic
>
>
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