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<h2>kaQuery.js</h2>
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<h4>Summary</h4>
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No overview generated for 'kaQuery.js'<BR/><BR/>
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<code>static Object</code>
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<code>
<b>
<a href="GLOBALS.html#!s!myQuery">myQuery</a></b>( eventID, queryType, coords ) * { * alert( "QUERY: " + queryType + " " + coords ); * } * * Querying actually does nothing except generate a KAMAP_QUERY event with * the query type and coordinates passed as parameters to the event handler * * Signature of the query event handler is: * * function myQueryHandler( eventID, queryType, queryCoords ) * * eventID: int, KAMAP_QUERY * * queryType: int, one of KAMAP_POINT_QUERY or KAMAP_RECT_QUERY * * queryCoords: array, array of two or four floating point coordinates * depending on the query type * * You can affect the style of the zoom box by changing oQuery.domObj.style as * you would with any other HTML element (it's a div). * *****************************************************************************/ var KAMAP_QUERY = gnLastEventId ++; var KAMAP_POINT_QUERY = 0; var KAMAP_RECT_QUERY = 1; function kaQuery( oKaMap, type )
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<pre class="sourceview"><span class="comment">/**********************************************************************
*
* $Id: overview-summary-kaQuery.js.html,v 1.1 2006/03/15 15:56:58 pspencer Exp $
*
* purpose: a simple tool for supporting queries. It just provides
* the user interface for defining the query point or
* area and defers the actual query to the application
*
* author: Paul Spencer (pspencer<span class="attrib">@dmsolutions</span>.ca)
*
* TODO:
*
* - implement a sample backend for query code
*
**********************************************************************
*
* Copyright (c) 2005, DM Solutions Group Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
**********************************************************************
*
* To use this tool:
*
* 1) add a script tag to your page
*
* <script type="text/javascript" src="kaQuery.js"></script>
*
* 2) create a new instance of kaQuery
*
* myKaQuery = new kaQuery( myKaMap, KAMAP_RECT_QUERY );
*
* 3) provide some way of activating it. This example would allow switching
* between querying and navigating.
*
* <input type="button" name="navigate" value="Navigate"
* onclick="myKaNavigator.activate()">
* <input type="button" name="query" value="Query"
* onclick="myKaQuery.activate()">
*
* 4) listen for the query event
*
* myKaMap.registerForEvent( KAMAP_QUERY, null, myQuery );
*
* 5) and do something when the user requests a query
*
* function myQuery( eventID, queryType, coords )
* {
* alert( "QUERY: " + queryType + " " + coords );
* }
*
* Querying actually does nothing except generate a KAMAP_QUERY event with
* the query type and coordinates passed as parameters to the event handler
*
* Signature of the query event handler is:
*
* function myQueryHandler( eventID, queryType, queryCoords )
*
* eventID: int, KAMAP_QUERY
*
* queryType: int, one of KAMAP_POINT_QUERY or KAMAP_RECT_QUERY
*
* queryCoords: array, array of two or four floating point coordinates
* depending on the query type
*
* You can affect the style of the zoom box by changing oQuery.domObj.style as
* you would with any other HTML element (it's a div).
*
*****************************************************************************/</span>
<span class="comment">// the query event id</span>
var KAMAP_QUERY = gnLastEventId ++;
<span class="comment">// human names for the query types</span>
var KAMAP_POINT_QUERY = 0;
var KAMAP_RECT_QUERY = 1;
<span class="comment">/**
* kaQuery constructor
*
* construct a new kaQuery object of a given type for a given kaMap instance
*
* oKaMap - a kaMap instance
*
* type - int, one of KAMAP_POINT_QUERY or KAMAP_RECT_QUERY. If the type is
* KAMAP_POINT_QUERY then only point queries are allowed. If the type
* is KAMAP_RECT_QUERY then point or rectangle queries are possible.
*/</span>
<span class="reserved">function</span> kaQuery( oKaMap, type ) {
kaTool.apply( <span class="reserved">this</span>, [oKaMap] );
<span class="reserved">this</span>.name = <span class="literal">'kaQuery'</span>;
<span class="reserved">this</span>.cursor = <span class="literal">'help'</span>;
<span class="comment">//this is the HTML element that is visible</span>
<span class="reserved">this</span>.domObj = document.createElement( <span class="literal">'div'</span> );
<span class="reserved">this</span>.domObj.style.position = <span class="literal">'absolute'</span>;
<span class="reserved">this</span>.domObj.style.top = <span class="literal">'0px'</span>;
<span class="reserved">this</span>.domObj.style.left = <span class="literal">'0px'</span>;
<span class="reserved">this</span>.domObj.style.width = <span class="literal">'1px'</span>;
<span class="reserved">this</span>.domObj.style.height = <span class="literal">'1px'</span>;
<span class="reserved">this</span>.domObj.style.zIndex = 100;
<span class="reserved">this</span>.domObj.style.visibility = <span class="literal">'hidden'</span>;
<span class="reserved">this</span>.domObj.style.border = <span class="literal">'1px solid red'</span>;
<span class="reserved">this</span>.domObj.style.backgroundColor = <span class="literal">'white'</span>;
<span class="reserved">this</span>.domObj.style.opacity = 0.50;
<span class="reserved">this</span>.domObj.style.mozOpacity = 0.50;
<span class="reserved">this</span>.domObj.style.filter = <span class="literal">'Alpha(opacity=50)'</span>;
<span class="reserved">this</span>.kaMap.theInsideLayer.appendChild( <span class="reserved">this</span>.domObj );
<span class="reserved">this</span>.startx = null;
<span class="reserved">this</span>.starty = null;
<span class="reserved">this</span>.endx = null;
<span class="reserved">this</span>.endy = null;
<span class="reserved">this</span>.bMouseDown = false;
<span class="reserved">this</span>.type = type;
<span class="reserved">for</span> (var p in kaTool.<span class="reserved">prototype</span>) {
<span class="reserved">if</span> (!kaQuery.<span class="reserved">prototype</span>[p])
kaQuery.<span class="reserved">prototype</span>[p]= kaTool.<span class="reserved">prototype</span>[p];
}
};
<span class="comment">/*
* draw a box representing the query region.
*
* kaQuery maintains the query region in four variables. The variables are
* assumed to be in pixel coordinates and are used to position the box. If
* any of the coordinates are null, clear the query box.
*/</span>
kaQuery.<span class="reserved">prototype</span>.drawZoomBox = <span class="reserved">function</span>() {
<span class="reserved">if</span> (<span class="reserved">this</span>.startx == null || <span class="reserved">this</span>.starty == null ||
<span class="reserved">this</span>.endx == null || <span class="reserved">this</span>.endy == null ) {
<span class="reserved">this</span>.domObj.style.visibility = <span class="literal">'hidden'</span>;
<span class="reserved">this</span>.domObj.style.top = <span class="literal">'0px'</span>;
<span class="reserved">this</span>.domObj.style.left = <span class="literal">'0px'</span>;
<span class="reserved">this</span>.domObj.style.width = <span class="literal">'1px'</span>;
<span class="reserved">this</span>.domObj.style.height = <span class="literal">'1px'</span>;
<span class="reserved">return</span>;
}
<span class="reserved">this</span>.domObj.style.visibility = <span class="literal">'visible'</span>;
<span class="reserved">if</span> (<span class="reserved">this</span>.endx < <span class="reserved">this</span>.startx) {
<span class="reserved">this</span>.domObj.style.left = (<span class="reserved">this</span>.endx - <span class="reserved">this</span>.kaMap.xOrigin) + <span class="literal">'px'</span>;
<span class="reserved">this</span>.domObj.style.width = (<span class="reserved">this</span>.startx - <span class="reserved">this</span>.endx) + <span class="literal">"px"</span>;
} <span class="reserved">else</span> {
<span class="reserved">this</span>.domObj.style.left = (<span class="reserved">this</span>.startx - <span class="reserved">this</span>.kaMap.xOrigin) + <span class="literal">'px'</span>;
<span class="reserved">this</span>.domObj.style.width = (<span class="reserved">this</span>.endx - <span class="reserved">this</span>.startx) + <span class="literal">"px"</span>;
}
<span class="reserved">if</span> (<span class="reserved">this</span>.endy < <span class="reserved">this</span>.starty) {
<span class="reserved">this</span>.domObj.style.top = (<span class="reserved">this</span>.endy - <span class="reserved">this</span>.kaMap.yOrigin) + <span class="literal">'px'</span>;
<span class="reserved">this</span>.domObj.style.height = (<span class="reserved">this</span>.starty - <span class="reserved">this</span>.endy) + <span class="literal">"px"</span>;
} <span class="reserved">else</span> {
<span class="reserved">this</span>.domObj.style.top = (<span class="reserved">this</span>.starty - <span class="reserved">this</span>.kaMap.yOrigin) + <span class="literal">'px'</span>;
<span class="reserved">this</span>.domObj.style.height = (<span class="reserved">this</span>.endy - <span class="reserved">this</span>.starty) + <span class="literal">"px"</span>;
}
};
<span class="comment">/**
* kaQuery.onmouseout( e )
*
* called when the mouse leaves theInsideLayer. Terminate the query
*
* e - object, the event object or null (in ie)
*/</span>
kaQuery.<span class="reserved">prototype</span>.onmouseout = <span class="reserved">function</span>(e) {
e = (e)?e:((event)?event:null);
<span class="reserved">if</span> (!e.target) e.target = e.srcElement;
<span class="reserved">if</span> (e.target.id == <span class="reserved">this</span>.kaMap.domObj.id) {
<span class="reserved">this</span>.bMouseDown = false;
<span class="reserved">this</span>.startx = <span class="reserved">this</span>.endx = <span class="reserved">this</span>.starty = <span class="reserved">this</span>.endy = null;
<span class="reserved">this</span>.drawZoomBox();
<span class="reserved">return</span> kaTool.<span class="reserved">prototype</span>.onmouseout.apply(<span class="reserved">this</span>, [e]);
}
};
<span class="comment">/**
* kaQuery.onmousemove( e )
*
* called when the mouse moves over theInsideLayer.
*
* e - object, the event object or null (in ie)
*/</span>
kaQuery.<span class="reserved">prototype</span>.onmousemove = <span class="reserved">function</span>(e) {
e = (e)?e:((event)?event:null);
<span class="reserved">if</span> (!<span class="reserved">this</span>.bMouseDown) {
<span class="reserved">return</span> false;
}
<span class="reserved">if</span> (<span class="reserved">this</span>.type == KAMAP_RECT_QUERY) {
var aPixPos = <span class="reserved">this</span>.adjustPixPosition( e.clientX, e.clientY );
<span class="reserved">this</span>.endx=-aPixPos[0];
<span class="reserved">this</span>.endy=-aPixPos[1];
<span class="reserved">this</span>.drawZoomBox();
}
<span class="reserved">return</span> false;
}
;
<span class="comment">/**
* kaQuery.onmousedown( e )
*
* called when a mouse button is pressed over theInsideLayer.
*
* e - object, the event object or null (in ie)
*/</span>
kaQuery.<span class="reserved">prototype</span>.onmousedown = <span class="reserved">function</span>(e) {
e = (e)?e:((event)?event:null);
<span class="reserved">if</span> (e.button==2) {
<span class="reserved">return</span> <span class="reserved">this</span>.cancelEvent(e);
} <span class="reserved">else</span> {
<span class="reserved">if</span> (<span class="reserved">this</span>.kaMap.isIE4) document.onkeydown = kaTool_redirect_onkeypress;
document.onkeypress = kaTool_redirect_onkeypress;
<span class="reserved">this</span>.bMouseDown=true;
var aPixPos = <span class="reserved">this</span>.adjustPixPosition( e.clientX, e.clientY );
<span class="reserved">this</span>.startx=<span class="reserved">this</span>.endx=-aPixPos[0];
<span class="reserved">this</span>.starty=<span class="reserved">this</span>.endy=-aPixPos[1];
<span class="reserved">this</span>.drawZoomBox();
e.cancelBubble = true;
e.returnValue = false;
<span class="reserved">if</span> (e.stopPropogation) e.stopPropogation();
<span class="reserved">if</span> (e.preventDefault) e.preventDefault();
<span class="reserved">return</span> false;
}
};
<span class="comment">/**
* kaQuery.onmouseup( e )
*
* called when a mouse button is clicked over theInsideLayer.
*
* e - object, the event object or null (in ie)
*/</span>
kaQuery.<span class="reserved">prototype</span>.onmouseup = <span class="reserved">function</span>(e) {
e = (e)?e:((event)?event:null);
var type = KAMAP_POINT_QUERY;
var start = <span class="reserved">this</span>.kaMap.pixToGeo( -<span class="reserved">this</span>.startx, -<span class="reserved">this</span>.starty );
var coords = start;
<span class="reserved">if</span> (<span class="reserved">this</span>.startx!=<span class="reserved">this</span>.endx&&<span class="reserved">this</span>.starty!=<span class="reserved">this</span>.endy) {
type = KAMAP_RECT_QUERY;
coords = start.concat(<span class="reserved">this</span>.kaMap.pixToGeo( -<span class="reserved">this</span>.endx, -<span class="reserved">this</span>.endy ));
<span class="reserved">if</span>(coords[2] < coords[0]) {
<span class="comment">//minx gt maxx than I invert values</span>
var minx = coords[2];
var maxx = coords[0];
coords[0] = minx;
coords[2] = maxx;
}
<span class="reserved">if</span>(coords[1] < coords[3]){
<span class="comment">//miny gt maggiore than I invert values</span>
var miny = coords[1];
var maxy = coords[3];
coords[3] = miny;
coords[1] = maxy;
}
}
<span class="reserved">this</span>.kaMap.triggerEvent(KAMAP_QUERY, type, coords);
<span class="reserved">this</span>.startx = <span class="reserved">this</span>.endx = <span class="reserved">this</span>.starty = <span class="reserved">this</span>.endy = null;
<span class="reserved">this</span>.drawZoomBox();
<span class="reserved">return</span> false;
};</pre>
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<div class="jsdoc_ctime">Documentation generated by <a href="http://jsdoc.sourceforge.net/" target="_parent">JSDoc</a> on Wed Mar 15 10:50:59 2006</div>
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