| Re: [udig-devel] doubt in plugin |
On Thu, Feb 26, 2009 at 1:17 PM, prasad babu <prasad.konduru2@xxxxxxxxx> wrote:HiI added a plug-in to the tool, and now I need to draw some thing on the map which conncets 4 coardinates.
So next up you can create a MapGraphic (its responsibility will be to draw the coordinates). Have a look at the code example documented here:
- http://udig.refractions.net/confluence/display/DEV/2+Training+Materials#2TrainingMaterials-MapGraphic
and I must restrict the size and way of the polygon or whatever... I wont allow users to draw what ever they want. I need to do some calculations while drawing a extra layer on the map.
That is fine; you can do whatever you need when drawing.My actual requirement.I need to work on a road map, there will be many roads , and I need to add some gantrys (means toll gates for price calculations) to the map . I just want to add a plug -in to do this process.
So what is your workflow? Are the four points representing a "tool gate"?
1. Select the "toll gate" tool; use it to draw a gate
2. During drawing you can use a DrawCommand to provide visual feedback; when the gate is done you can invalidate the draw command and add the new gate to the map blackboard. When the gate is done you can check if there is a "toll gate" mapgraphic on the map and if not you can add it; if it is already there you can refresh it
3. Create a "toll gate" mapgraphic that draws the toll gate on the screen
Is this correct? Are you really drawing a box for a toll gate; or do you need to click and snap to the nearest layer?1-> Which class I need to extend to write an extra layer? (I extended simple tool for calulate the distance in the example,there are methods like mouse dragged and so on..) and I also needto do an reverse engine that means I will get the data from GPS (4 Coardinates)and I need to connect ther 4 coardinate and display it automaticaly once I open the Map.Plese suggest me what would be the best way to do this.Any ideas will be appriciated.Thanks in advanceBabu
On Wed, Feb 25, 2009 at 10:51 AM, Jody Garnett <jody.garnett@xxxxxxxxx> wrote:
That sounds perfect; if you are intending to define a region of interest then a region of interest tool is more explicit to both you and your user. You should find that your tool can store the region of interest on the map backboad; and then your other view etc can pick it up from there as needed. The coordinate tool / coordinate map graphic example in tutorials show how to do this; and it has been used by many other teams. The DIVAGIS team used this techqniue to define a region of interest "grid" and then had a bunch of operations build around doing analysis of the points that fell into each grid square.
Jody
On Tue, Feb 24, 2009 at 7:46 PM, Despres <damien.despres@xxxxxxxxxxxx> wrote:
Thanks for your help,
The point is that the filter i get doesn’t contain a bounding box. Indeed, I may have only one or no rasters layer on the map.
I think what I tried to do is impossible with the Bbox selection tool, so I developped my own Bbox tool. The goal is just to define a Region of Interest.
Damien
De : udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx [mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] De la part de Jody Garnett
Envoyé : mardi 24 février 2009 06:08
À : User-friendly Desktop Internet GIS
Objet : Re: [udig-devel] BBoxSelection Listener
The filter geneated by the BBoxSelectionCommand is available for you .... layer.getFilter().
You can look at this data structure and get the bounding box if you like; altough the selection for a layer (ie the filter) is not always done as a bounding box.
I hope this helps.
If you need to listen to any random part of the project/map/layer/viewport model you can - the magic word you need to know is "adapters"; the best way to figure out how is to look at some of the existing add/remove listener implementations and watch how they translate a Notification (ie what adapters "listen to") into a layer change event.
I am still not sure if the various map changed, and layer changed events are worth while or if it would be easier just to use this Notification thing everywhere.
JodyOn Wed, Feb 18, 2009 at 4:35 AM, Despres <damien.despres@xxxxxxxxxxxx> wrote:
Hi all,
I’m trying to develop a plug-in that could listen to the BBoxSelectionCommand and get the bbox that have been drawn by the user with the bbox tool.
I’ve tried to add a MapListener, I catch an event but it doesn’t help:
activeMap.addMapListener(new IMapListener(){
public void changed(MapEvent event)
{
System.out.println("change");
if(event.getType() == MapEvent.MapEventType.MAP_COMMAND){
CommandManager val = (CommandManager)event.getNewValue();
Object old=event.getOldValue();
System.out.println(val.getMaxHistorySize());
}
}});
}
Thanks in advance for your help, I’m really lost here.
DESPRES Damien
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel