Changes between Initial Version and Version 1 of PHPMapScriptAddPoint

Timestamp:

Jan 27, 2009, 9:40:47 AM (15 years ago)

Author:

jmckenna

Comment:

--

PHPMapScriptAddPoint

@@ +1 @@
+= Add a dynamic point to a layer =
+
+This is a simple example of how to use PHPMapScript. It is intended to be for begginers (as me). We are going to add a point on the position the user clicked on a map.
+
+On our MapFile, we have blank Point layer called "INLINE", This is the layer where we are going to add our dynamic point. Here you have a sample:
+{{{
+  LAYER
+    NAME "INLINE"
+    TYPE POINT
+    STATUS ON
+   CLASS
+       NAME "0"
+       STYLE
+         COLOR 255 0 0 # red
+         MAXSIZE 300 # default 50
+         SYMBOL 'phone' #In my case was a nice phone image symbol
+         SIZE 16
+       END #style
+   END #class
+ END #layer
+}}}
+= PHP code =
+
+The source filename is query2.php
+{{{
+<?php
+
+//Load the dynamic library.
+dl('php_mapscript.so');
+//dl('php_mapscript_42.dll'); //For WinDoS Users
+
+//Convert pixels to map units (got from PHPMapscriptSnippet1)
+function click2map ($click_x, $click_y) {
+    global $map;
+    $e= &$map->extent; //for saving writing
+    $x_pct = ($click_x / $map->width);
+    $y_pct = 1 - ($click_y / $map->height);
+    $x_map = $e->minx + ( ($e->maxx - $e->minx) * $x_pct);
+    $y_map = $e->miny + ( ($e->maxy - $e->miny) * $y_pct);
+
+    return array($x_map, $y_map);
+}
+
+$map= ms_newMapObj('data/test2.map');
+//Convert pixels to map units
+$map_pt = click2map($_GET['image_x'],$_GET['image_y'],$map->extent);
+//Create the point
+$pt = ms_newPointObj();
+$pt-> setXY($map_pt[0],$map_pt[1]);
+
+//Draw the map and add the point
+$img = $map->draw();
+$layer = $map->getLayerByName('INLINE');
+$pt->draw($map, $layer, $img, 0 ,'yuhuu');
+$url = $img->saveWebImage();
+?>
+
+< html>< head></ head>< body>
+
+<form method="get" action="query2.php" >
+   <input style="border:thin solid black;" type="image" 
+          name="image" src="<?php echo $url?>" />
+</form>
+
+< pre>
+<!-- Debug Lines -->
+<?php
+echo "GET\n";
+print_r($_GET);
+echo "Point:\n";
+print_r($pt); ?>
+?>
+< /pre>
+< /body>
+< /html>
+}}}
+-- Merlos
+
+Go back to: [wiki:PHPMapScript]