[Users] Search functionality with GeoExt but without Mapfish

[Matt Priour]

I have a WFSSearchForm that I built that I thought would be a good fit, but looking into it, I see that there are a lot of specific assumptions and simplifications that essentially recreates the logic of the GeoExt.form.FormPanel but in a much less flexible way. So I would instead suggest a panel which combines a GeoExt.form.FormPanel and a feature grid.
The following code is combined from the GeoExt examples but is untested

...
var vecLayer = new OpenLayers.Layer.Vector('myVectorLayer');
var store,gridPanel,formPanel,mainPanel

// create feature store, binding it to the vector layer
store = new GeoExt.data.FeatureStore({
    layer: vecLayer,
    fields: [
        {name: 'name', type: 'string'},
        {name: 'elevation', type: 'float'}
    ],
    proxy: new GeoExt.data.ProtocolProxy({
        protocol: new OpenLayers.Protocol.WFS({
            url: "http://my.wfs",
            outputFormat: new OpenLayers.Format.GeoJSON()
   //, ... other wfs options ...
        })
    }),
    autoLoad: false
});

// create grid panel configured with feature store
gridPanel = new Ext.grid.GridPanel({
    title: "Feature Grid",
    anchor: "100% 50%",
    store: store,
    columns: [{
        header: "Name",
        width: 200,
        dataIndex: "name"
    }, {
        header: "Elevation",
        width: 100,
        dataIndex: "elevation"
    }],
    sm: new GeoExt.grid.FeatureSelectionModel() 
});

// create form panel configured with the feature store's protocol
formPanel = new GeoExt.form.FormPanel({
 anchor: '100% 50%',
 protocol: store.proxy.protocol,
 items: [{
  xtype: "textfield",
  name: "name__like",
  fieldLabel: "Name"
 }, {
  xtype: "textfield",
  name: "elevation__ge",
  fieldLabel: "Max Elevation"
 }],
 buttons: [{
  text: 'Search',
  handler: function(){
   //hiding inside a function to change scope to formPanel
   //perform the formPanel's default filtered search action
   this.search();
  }
 }]
});

// create main panel
mainPanel = new Ext.Window({
 title:'A Filtered Attribute Search Form',
 layout:'anchor',
 closeAction:'hide',
 closeable:true,
 items:[formPanel,gridPanel]
})

mainPanel.show();

.....

Hope that helps

Matt Priour
Kestrel Computer Consulting




From: Robert Buckley 
Sent: Tuesday, November 02, 2010 2:15 AM
To: users at geoext.org 
Subject: [Users] Search functionality with GeoExt but without Mapfish


Hi,

I would like to have a search capability in a geoext project but I do not have Mapfish installed. 
Are there any Geoext examples regarding searching through datasets coming from geoserver, 
or any code snippets showing how to implement such a function using either shapefiles or postgis?

yours,

Robert Buckley







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