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mathias |
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// model that works with Yahoo Search API
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dojo.declare("dojox.grid.data.yahooSearch", dojox.grid.data.dynamic,
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function(inFields, inData, inSearchNode) {
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this.rowsPerPage = 20;
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this.searchNode = inSearchNode;
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this.fieldNames = [];
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for (var i=0, f; (f=inFields[i]); i++)
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this.fieldNames.push(f.name);
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}, {
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// server send / receive
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encodeParam: function(inName, inValue) {
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return dojo.string.substitute('&${0}=${1}', [inName, inValue]);
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},
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getQuery: function() {
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return dojo.byId(this.searchNode).value.replace(/ /g, '+');
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},
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getParams: function(inParams) {
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var url = this.url;
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url += '?appid=foo';
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inParams = inParams || {};
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inParams.output = 'json';
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inParams.results = this.rowsPerPage;
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inParams.query = this.getQuery();
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for (var i in inParams)
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if (inParams[i] != undefined)
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url += this.encodeParam(i, inParams[i]);
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return url;
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},
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send: function(inAsync, inParams, inOnReceive, inOnError) {
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var
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p = this.getParams(inParams),
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d = dojo.xhrPost({
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url: "support/proxy.php",
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content: {url: p },
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contentType: "application/x-www-form-urlencoded; charset=utf-8",
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handleAs: 'json-comment-filtered',
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sync: !inAsync
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});
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d.addCallbacks(dojo.hitch(this, "receive", inOnReceive, inOnError), dojo.hitch(this, "error", inOnError));
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this.onSend(inParams);
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return d;
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},
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receive: function(inOnReceive, inOnError, inData) {
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try {
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inData = inData.ResultSet;
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inOnReceive(inData);
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this.onReceive(inData);
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} catch(e) {
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if (inOnError)
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inOnError(inData);
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}
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},
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error: function(inOnError, inErr) {
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var m = 'io error: ' + inErr.message;
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alert(m);
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if (inOnError)
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inOnError(m);
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},
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fetchRowCount: function(inCallback) {
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this.send(true, inCallback );
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},
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// request data
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requestRows: function(inRowIndex, inCount) {
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inRowIndex = (inRowIndex == undefined ? 0 : inRowIndex);
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var params = {
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start: inRowIndex + 1
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}
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this.send(true, params, dojo.hitch(this, this.processRows));
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},
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// server callbacks
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processRows: function(inData) {
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for (var i=0, l=inData.totalResultsReturned, s=inData.firstResultPosition; i<l; i++) {
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this.setRow(inData.Result[i], s - 1 + i);
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}
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// yahoo says 1000 is max results to return
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var c = Math.min(1000, inData.totalResultsAvailable);
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if (this.count != c) {
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this.setRowCount(c);
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this.allChange();
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this.onInitializeData(inData);
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}
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},
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getDatum: function(inRowIndex, inColIndex) {
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var row = this.getRow(inRowIndex);
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var field = this.fields.get(inColIndex);
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return (inColIndex == undefined ? row : (row ? row[field.name] : field.na));
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},
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// events
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onInitializeData: function() {
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},
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onSend: function() {
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},
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onReceive: function() {
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}
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});
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// report
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modelChange = function() {
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var n = dojo.byId('rowCount');
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if (n)
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n.innerHTML = dojo.string.substitute('about ${0} row(s)', [model.count]);
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}
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// some data formatters
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getCellData = function(inCell, inRowIndex, inField) {
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var m = inCell.grid.model;
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return m.getDatum(inRowIndex, inField);
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}
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formatLink = function(inData, inRowIndex) {
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if (!inData)
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return ' ';
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var text = getCellData(this, inRowIndex, this.extraField);
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return dojo.string.substitute('<a target="_blank" href="${href}">${text}</a>', {href: inData, text: text });
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};
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formatImage = function(inData, inRowIndex) {
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if (!inData)
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return ' ';
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var info = getCellData(this, inRowIndex, this.extraField);
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var o = {
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href: inData,
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src: info.Url,
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width: info.Width,
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height: info.Height
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}
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return dojo.string.substitute('<a href="${href}" target="_blank"><img border=0 src="${src}" width="${width}" height="${height}"></a>', o);
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};
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formatDate = function(inDatum, inRowIndex) {
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if (!inDatum)
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return ' ';
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var d = new Date(inDatum * 1000);
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return dojo.string.substitute("${0}/${1}/${2}",[d.getMonth()+1, d.getDate(), d.getFullYear()])
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};
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formatDimensions = function(inData, inRowIndex) {
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if (!inData)
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return ' ';
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var w = inData, h = getCellData(this, inRowIndex, this.extraField);
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return w + ' x ' + h;
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}
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