[OpenLayers-Users] How to draw a arrow with openlayer?

[Alexandre Dubé]

Hi Hua Jie,

   What you did is really nice!  You could contribute this by making an 
example out of it :

   * fork openlayers 'master' branch and clone
   * create new .html and .js in the 'examples' directory to create an 
example out of it, using the same files the other examples do.
   * add/commit/push/pull request

   Even though the class you created wouldn't be part of the actual 
core, it would still demonstrate how to assemble OpenLayers core 
components to achieve this.

Regards,

Alexandre


On 13-01-28 10:46 PM, 杨华杰 wrote:
> Hi All
>
> Thanks for all the help.
>
> I draft a version first. Not sure how to contribute to the lib.
>
> Here is some screenshot.
> http://www.javalinux.me/?p=681
>
>
> Here is the demo page:
> http://www.javalinux.me/openlayer/arrow/
>
>
> Regards,
> Hua Jie
>
>
> On Fri, Jan 25, 2013 at 6:25 PM, Arnd Wippermann 
> <arnd.wippermann at web.de <mailto:arnd.wippermann at web.de>> wrote:
>
>     Hi,
>     may be this examples can help:
>     approach like Imran described
>     http://gis.ibbeck.de/ginfo/apps/OLExamples/OL210/Line_Direction/direction_arrow.asp
>     http://gis.ibbeck.de/ginfo/apps/OLExamples/OL212/Direction_Vectors/rotation_of_simple_direction_vectors.asp
>     Arnd
>
>     ------------------------------------------------------------------------
>     *Von:* openlayers-users-bounces at lists.osgeo.org
>     <mailto:openlayers-users-bounces at lists.osgeo.org>
>     [mailto:openlayers-users-bounces at lists.osgeo.org
>     <mailto:openlayers-users-bounces at lists.osgeo.org>] *Im Auftrag von
>     *???
>     *Gesendet:* Freitag, 25. Januar 2013 05:06
>     *An:* Imran Rajjad
>     *Cc:* openlayers-users at lists.osgeo.org
>     <mailto:openlayers-users at lists.osgeo.org>
>     *Betreff:* Re: [OpenLayers-Users] How to draw a arrow with openlayer?
>
>     Hi Guys
>
>     I got some process.
>
>     But I have a problem to draw with the mouse, during the drawing, I
>     can see the angle. But when I double click, the angle gone. Any
>     tips will help.
>
>
>     Regards,
>     Hua Jie
>
>
>     On Thu, Jan 24, 2013 at 10:01 AM, 杨华杰 <yhjhoo at gmail.com
>     <mailto:yhjhoo at gmail.com>> wrote:
>
>         Hi Imran
>
>         Thanks for your reply. I believe a lot people have the same
>         questions. Why this feature is not released.
>
>
>         Regards,
>         Hua Jie
>
>
>         On Wed, Jan 23, 2013 at 10:28 PM, Imran Rajjad
>         <rajjad at gmail.com <mailto:rajjad at gmail.com>> wrote:
>
>             Hi,
>
>             you can make a feature whose geometry is a
>             GeometryCollection, this collection can contain a line and
>             a point grouped into one geometry then you can use the
>             below mentioned style to draw an arrow with your line
>
>
>             {
>             strokeColor: "#00688B",
>             fillColor: "#00688B",
>             fillOpacity : 1.0,
>             strokeWidth: 2,
>             strokeOpacity : 0.9,
>             pointRadius: 6,
>             graphicName :"triangle",
>             rotation :angle
>             }
>
>             remember to compute the angle before setting this .. you
>             should be able to calculate angle between start and end
>             point of your line segment.. and also the position of
>             point geometry which will be drawn as triage with given
>             rotation angle..
>
>             Hope I got my point through..
>
>             regards,
>             Imran
>
>             On Wed, Jan 23, 2013 at 7:11 PM, 杨华杰 <yhjhoo at gmail.com
>             <mailto:yhjhoo at gmail.com>> wrote:
>
>                 Hi Alexandre
>
>                 Thank you, I will try this.
>
>
>                 Regards,
>                 Hua Jie
>
>
>                 On Wed, Jan 23, 2013 at 10:01 PM, Alexandre Dubé
>                 <adube at mapgears.com <mailto:adube at mapgears.com>> wrote:
>
>                     Hi Hua Jie,
>
>                     You could try to define your own arrow symbol.
>                     There's one defined [here], see line 1 :
>                     OpenLayers.Renderer.symbol.arrow = [0,2, 1,0, 2,2,
>                     1,0, 0,2]
>
>                        I haven't tried it, but it could do the trick.
>
>                     HTH,
>
>                     Alexandre
>
>                     [here]
>                     http://code.google.com/p/rep-olnet/source/browse/trunk/Direction.js?r=61
>
>
>
>
>                     On 13-01-23 07:09 AM, 杨华杰 wrote:
>>                     Hi
>>
>>                     As the title
>>
>>                     I know how to draw a line, dot, polygon. But my
>>                     customer need some directions on the map
>>
>>
>>                     Regards,
>>                     Hua Jie
>>
>>
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>>                     Users at lists.osgeo.org  <mailto:Users at lists.osgeo.org>
>>                     http://lists.osgeo.org/mailman/listinfo/openlayers-users
>
>
>                     -- 
>                     Alexandre Dubé
>                     Mapgears
>                     www.mapgears.com  <http://www.mapgears.com>
>
>
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>
>
>
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>
>
>
>             -- 
>             I.R
>
>
>
>
>
>
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-- 
Alexandre Dubé
Mapgears
www.mapgears.com

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