Created
December 9, 2011 15:21
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Creating a custom google maps marker with canvas
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <style> | |
| html { | |
| width: 100%; | |
| height: 100%; | |
| } | |
| body { | |
| width: 100%; | |
| height: 100%; | |
| margin: 0; | |
| } | |
| #map_canvas { | |
| width: 100%; | |
| height: 100%; | |
| } | |
| </style> | |
| <script src="http://maps.googleapis.com/maps/api/js?sensor=false"></script> | |
| </head> | |
| <body onload="initialize()"> | |
| <div id="map_canvas"></div> | |
| <script> | |
| function createMarker(width, height, radius) { | |
| var canvas, context; | |
| canvas = document.createElement("canvas"); | |
| canvas.width = width; | |
| canvas.height = height; | |
| context = canvas.getContext("2d"); | |
| context.clearRect(0,0,width,height); | |
| // background is yellow | |
| context.fillStyle = "rgba(255,255,0,1)"; | |
| // border is black | |
| context.strokeStyle = "rgba(0,0,0,1)"; | |
| context.beginPath(); | |
| context.moveTo(radius, 0); | |
| context.lineTo(width - radius, 0); | |
| context.quadraticCurveTo(width, 0, width, radius); | |
| context.lineTo(width, height - radius); | |
| context.quadraticCurveTo(width, height, width - radius, height); | |
| context.lineTo(radius, height); | |
| context.quadraticCurveTo(0, height, 0, height - radius); | |
| context.lineTo(0, radius); | |
| context.quadraticCurveTo(0, 0, radius, 0); | |
| context.closePath(); | |
| context.fill(); | |
| context.stroke(); | |
| return canvas.toDataURL(); | |
| } | |
| // example | |
| function initialize() { | |
| // creating a map | |
| var map = new google.maps.Map(document.getElementById("map_canvas"), { | |
| zoom: 4, | |
| center: new google.maps.LatLng(-25.363882,131.044922), | |
| mapTypeId: google.maps.MapTypeId.ROADMAP | |
| }); | |
| // creating a marker | |
| var marker = new google.maps.Marker({ | |
| position: new google.maps.LatLng(-25.363882,131.044922), | |
| map: map, | |
| title:"Hello World!", | |
| icon: createMarker(25, 25, 4) | |
| }); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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