Kinetic Text object have left,right,center (http://kineticjs.com/docs/Kinetic.Text.html) align possible. Is there some way to achieve justified text ?
KineticJS is based on the html canvas element and canvas does not offer text justification.
You could construct your own text justification routine using canvas's context.measureText to measure the width of each word and fill each line of text in a justified pattern.
Example code and a Demo: http://jsfiddle.net/m1erickson/c7dwC/
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Prototype</title>
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v5.0.1.min.js"></script>
<style>
body{padding:20px;}
#container{
border:solid 1px #ccc;
margin-top: 10px;
width:350px;
height:350px;
}
</style>
<script>
$(function(){
function Justifier(text,font,linewidth,lineheight){
//
this.font=font;
this.lorem=text;
this.maxLineWidth=linewidth;
this.lineHeight=lineheight;
//
this.canvas=document.createElement("canvas");
this.ctx=this.canvas.getContext("2d");
this.aLorem=this.lorem.split(" ");
this.aWidths=[];
this.spaceWidth;
//this.run();
}
Justifier.prototype.run=function(){
this.ctx.save();
this.ctx.font=this.font;
spaceWidth=this.ctx.measureText(" ").width;
for(var i=0;i<this.aLorem.length;i++){
this.aWidths.push(this.ctx.measureText(this.aLorem[i]).width);
}
this.ctx.restore();
//
var justifiedLines=[];
var startingIndex=0;
do{
var line=this.justifyLine(startingIndex);
justifiedLines.push(line);
startingIndex=line.endingIndex+1;
}while(startingIndex<this.aLorem.length-1);
//
this.canvas.width=this.maxLineWidth;
this.canvas.height=justifiedLines.length*this.lineHeight+5;
this.ctx.font=this.font;
for(var i=0;i<justifiedLines.length;i++){
this.drawJustifiedLine(justifiedLines[i],i*this.lineHeight+this.lineHeight);
}
}
Justifier.prototype.justifyLine=function(startingIndex){
var accumWidth=0;
var accumWordWidth=0;
var padding=0;
var justifiedPadding;
var index=startingIndex;
while(index<this.aLorem.length && accumWidth+padding+this.aWidths[index]<=this.maxLineWidth){
accumWidth+=padding+this.aWidths[index];
accumWordWidth+=this.aWidths[index];
padding=spaceWidth;
index++;
};
if(index<this.aWidths.length-1){
index--;
justifiedPadding=(this.maxLineWidth-accumWordWidth)/(index-startingIndex);
}else{
justifiedPadding=(this.maxLineWidth-accumWordWidth)/(index-startingIndex-1);
}
return({
startingIndex:startingIndex,
endingIndex:index,
justifiedPadding:justifiedPadding}
);
}
Justifier.prototype.drawJustifiedLine=function(jLine,y){
var sp=jLine.justifiedPadding;
var accumLeft=0;
for(var i=jLine.startingIndex;i<=jLine.endingIndex;i++){
this.ctx.fillText(this.aLorem[i],accumLeft,y);
accumLeft+=this.aWidths[i]+sp;
}
}
var stage = new Kinetic.Stage({
container: 'container',
width: 350,
height: 350
});
var layer = new Kinetic.Layer();
stage.add(layer);
var font="14px verdana";
var text="Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s.";
var J=new Justifier(text,font,250,18);
J.run();
var textImage=new Kinetic.Image({
x:20,
y:20,
image:J.canvas,
draggable:true,
});
layer.add(textImage);
layer.draw();
}); // end $(function(){});
</script>
</head>
<body>
<h4>KineticJS Justified Text</h4>
<div id="container"></div>
</body>
</html>
Related
This is my code:
var Editor = {
layer: new Kinetic.Layer(),
map: null,
init: function () {
var stage = new Kinetic.Stage({
container: 'board',
width: 800,
height: 800
})
this.map = new Kinetic.Shape({
sceneFunc: function(context) {
context.beginPath();
context.moveTo(0, 0);
context.lineTo(mapWidth, 0);
context.lineTo(mapWidth, mapHeight);
context.lineTo(0, mapHeight);
context.closePath();
context.fillStrokeShape(this);
},
x: 0,
y: 0,
fill: 'green',
draggable: true
})
this.layer.add(this.map)
stage.add(this.layer)
}
}
I want to change the colors of the pixels in the rectangle. Colors of pixels will be generated by the "diamond-square" algorithm. Is it possible to change the colors of individual pixels? If so, how can I do this?
[ Changed answer ]
Use an offscreen html canvas to overlay the pixels in your "diamond-square" algorithm.
Demo: http://jsfiddle.net/m1erickson/6mDSm/
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Prototype</title>
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v5.0.1.min.js"></script>
<style>
body{padding:20px;}
#container{
border:solid 1px #ccc;
margin-top: 10px;
width:350px;
height:350px;
}
</style>
<script>
$(function(){
var stage = new Kinetic.Stage({
container: 'container',
width: 350,
height: 350
});
var layer = new Kinetic.Layer();
stage.add(layer);
var mapWidth=50;
var mapHeight=75;
// use an offscreen canvas as a pixel-map overlaying the green map
var pixelCanvas=document.createElement("canvas");
var ctx=pixelCanvas.getContext("2d");
pixelCanvas.width=mapWidth;
pixelCanvas.height=mapHeight;
pixelCanvas.pixels=[]
pixelCanvas.setPixel=function(x,y,color){
ctx.fillStyle=color;
ctx.fillRect(x,y,1,1);
};
// create a group
// that holds the green map background and pixel-map overlay
var mapGroup=new Kinetic.Group({
x:30,
y:30,
width:mapWidth,
height:mapHeight,
draggable:true
});
layer.add(mapGroup);
// the green background
var map=new Kinetic.Rect({
x:0,
y:0,
width:mapWidth,
height:mapHeight,
fill:"green"
});
mapGroup.add(map);
// an image overlay that
// gets "live-updates" from an offscreen canvas
var pixels=new Kinetic.Image({
x:0,
y:0,
image:pixelCanvas
});
mapGroup.add(pixels);
layer.draw();
// testing
var y=15;
$("#add").click(function(){
for(var i=0;i<5;i++){
pixelCanvas.setPixel(15,y,"red");
pixelCanvas.setPixel(25,y,"gold");
pixelCanvas.setPixel(35,y++,"blue");
}
pixels.draw();
});
}); // end $(function(){});
</script>
</head>
<body>
<button id="add">Add test Pixels</button>
<div id="container"></div>
</body>
</html>
Note: my previous answer using Kinetic.Shape was leaving an undesirable "ghost"
I have 2 Dojo Dijit ContentPane's side by side. I want to show/hide one of them, and have the other one stretch dynamically as needed. I am using an ESRI mapping example which uses 'dijit.layout.BorderContainer'. The "divRightMenu" will show/hide itself correctly, but, when opened, rather than pushing the "mapDiv" Div, it just appears on top of it. I want the "mapDiv" div to dynamically resize itself depending on the visible state of the "divRightMenu" div.
I'm including the full page code below - I have already experimented with style.Display = Block / None, style.Visibility = Visible/Hidden, as well as trying to dynamically set the width of divRightMenu from 1 pixel to 150 pixels. In all cases, divRightMenu appears "on top of" mapDiv, rather than "pushing" it like I want. If I change the code so that divRightMenu is visible by default on page load, then what happens when i hide it is it disappears, but the blank spot it once occupied still remains. Surely this is something simple I'm missing?
In the past (standard CSS), I would combine "float:left/right" with "overflow:hidden", and display:block/none, and could easily achieve the effect I'm after, but with Dojo/Dijit i'm not sure what i'm missing. I experimented with various combinations of float/overflow on the inline styling of the 2 DIV tags in question, but was unable to get it to work. I also noted that one poster mentioned that he programmatically created his dijit ContentPanes on the fly to overcome the issue, but I was hoping for a solution other than this (i need all the settings from the div's content to be retained between showing/hiding the div, and i'm not sure if re-creating it on the fly will allow for this).
Here are the 2 threads I found that touch on the topic:
Dojo Toggle Hide and Show Divs
Toggling the display of a Dojo dijit
These mainly deal with being able to hide the div or not. In my case I'm able to hide/show it, but just not able to get the desired auto-resize behavior from the remaining DIV.
In any case, full code sample is included below - any help would be appreciated:
Main Index.htm Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta name="generator" content="HTML Tidy for Windows (vers 14 February 2006), see www.w3.org">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title></title>
<link rel="stylesheet" type="text/css" href="layout.css">
<link rel="stylesheet" type="text/css"href="http://serverapi.arcgisonline.com/jsapi/arcgis/1.2/js/dojo/dijit/themes/tundra/tundra.css">
<script type="text/javascript">
var djConfig = {
parseOnLoad: true
}
function ToggleVisibility(id)
{
//if (dijit.byId(id).domNode.style.width == '150px') {
if (dijit.byId(id).domNode.style.display == 'block') {
dijit.byId(id).domNode.style.display = 'none';
//dijit.byId(id).domNode.style.width = "1px";
//dojo.style(id, "visibility", "hidden");
}
else {
//dijit.byId(id).domNode.style.width = "150px";
dijit.byId(id).domNode.style.display = 'block';
//dojo.style(id, "visibility", "visible");
}
dijit.byId(id).resize();
//dijit.byId("mapDiv").resize();
}
</script>
<script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=1.2"></script>
<script src="layout.js" type="text/javascript"></script>
<script type="text/javascript">
dojo.require("dijit.layout.BorderContainer");
dojo.require("dijit.layout.ContentPane");
</script>
</head>
<body class="tundra">
<!--TOPMOST LAYOUT CONTAINER-->
<div style="border:4px solid purple;width:100%;height:100%;" id="mainWindow" dojotype="dijit.layout.BorderContainer" design="headline" gutters="false">
<!--HEADER SECTION-->
<div id="header" style="border:4px solid red;height:85px;" dojotype="dijit.layout.ContentPane" region="top">
<div id="headerArea" style="border:2px solid black;height:50px;" dojotype="dijit.layout.ContentPane" region="top">Logo Here</div>
<div id="navMenuArea" style="border:2px solid green;height:35px;" dojotype="dijit.layout.ContentPane" region="top">Menu Here | <input type="button" onClick="ToggleVisibility('divRightMenu');" value="Toggle Right Menu"/></div>
</div>
<!--CENTER SECTION-->
<!--CENTER CONTAINER-->
<div id="mapDiv" style="border:2px solid green;margin:2px;" dojotype="dijit.layout.ContentPane" region="center"></div>
<!--RIGHT CONTAINER-->
<div id="divRightMenu" style="display:none;width:150px;border:2px solid orange;background-color:whitesmoke;" dojotype="dijit.layout.ContentPane" region="right">
Right Menu
</div>
<!--FOOTER SECTION-->
<div style="border:4px solid blue;height:50px;" id="footer" dojotype="dijit.layout.ContentPane" region="bottom">
Footer Here
</div>
</div>
</body>
</html>
layout.js Code:
dojo.require("esri.map");
var resizeTimer;
var map;
function init() {
var initialExtent = new esri.geometry.Extent(-125.0244140625, 14.4580078125, -80.0244140625, 59.4580078125, new esri.SpatialReference({
wkid: 4326
}));
map = new esri.Map("mapDiv", {
extent: initialExtent
});
dojo.connect(map, 'onLoad', function(theMap) {
dojo.connect(dijit.byId('mapDiv'), 'resize', function() {
resizeMap();
});
});
var url = "http://server.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer";
var tiledLayer = new esri.layers.ArcGISTiledMapServiceLayer(url);
map.addLayer(tiledLayer);
}
//Handle resize of browser
function resizeMap() {
clearTimeout(resizeTimer);
resizeTimer = setTimeout(function() {
map.resize();
map.reposition();
}, 800);
}
//show map on load
dojo.addOnLoad(init);
layout.css Code:
html, body {
height: 100%;
width: 100%;
margin: 0;
padding: 0;
}
body {
background-color:#FFF;
overflow:hidden;
font-family: "Trebuchet MS";
}
#header {
background-color:#FFF;
color:#999;
font-size:16pt;
font-weight:bold;
}
#headerArea {
text-align:left;
}
#navMenuArea {
text-align:right;
/*background:url(toolbar_bg.png) repeat #6788a2;*/
}
#topmenu {
background-color:#FFF;
color:#999;
font-size:16pt;
text-align:right;
font-weight:bold;
}
#footer {
background-color:#FFF;
color:#999;
font-size:10pt;
text-align:center;
}
Use a dijit/layout/BorderContainer, place the 2 contentpanes inside it, setting one of the 2 containers' region property to "center" and the other one to "right".
When you want to resize one of the contentpanes, call their "resize" method with an object containing the "w" property.
After calling resize on the contentpane, call "layout" on the border container.
Example :
require([
"dijit/layout/BorderContainer",
"dijit/layout/ContentPane",
"dijit/form/Button",
"dojo/domReady!"
], function(BorderContainer, ContentPane, Button){
var container = new BorderContainer({
design : "headline",
gutters : false
}, "container");
var pane1 = new ContentPane({
region : "center",
id : "pane1"
});
var pane2 = new ContentPane({
region : "right",
id : "pane2"
});
var toolbar = new ContentPane({
region : "bottom",
id : "toolbar"
});
var btn = new Button({
label : "Change right side",
onClick : function(){
pane2.resize({ w : Math.random() * pane2.get("w") });
container.layout();
}
});
toolbar.addChild(btn);
container.addChild(pane1);
container.addChild(pane2);
container.addChild(toolbar);
container.startup();
});
See this fiddle : http://jsfiddle.net/psoares/vEsy7/
How can I display two Infowindow on my map.
in my code I can open only one InfoWindow, but I will display at same time twoo InfoWindow on my map what can I do. my code is:
function load() {
if (GBrowserIsCompatible()) {
var map = new GMap2(document.getElementById("map"));
map.setCenter(new GLatLng( 38.736946, 35.310059), 6);
map.openInfoWindow(new GLatLng( 38.582526, 42.846680),
document.createTextNode("Van Gölü"));
}
}
The Google Maps API v2 native InfoWindow only supports one per map. The Google Maps API v3 removes that limitation.
Either use a custom InfoWindow or migrate your application to the Google Maps API v3.
As #duncan observed, that Google Maps API v2 has been officially deprecated as of May 19, 2010 and will not be supported after May 19, 2013. New development in that API is strongly discouraged.
this code is working :
<!DOCTYPE html>
<html>
<head>
<META http-equiv=content-type content=text/html;charset=x-mac-turkish>
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<script src="js/jquery.js"></script>
<script type="text/javascript"
src="https://maps.googleapis.com/maps/api/js?key=mykey&sensor=false">
</script>
<script type="text/javascript">
var map;
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(39.078908,35.244141),
zoom: 6,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"),
mapOptions);
infoWindow = new google.maps.InfoWindow();
var windowLatLng = new google.maps.LatLng(38.668356,33.376465);
infoWindow.setOptions({
content: "Tuz Golu",
position: windowLatLng,
});
infoWindow.open(map);
infoWindow2 = new google.maps.InfoWindow();
var windowLatLng2 = new google.maps.LatLng(38.565348,42.868652);
infoWindow2.setOptions({
content: "Van Golu",
position: windowLatLng2,
});
infoWindow2.open(map);
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:65%; height:40%"></div>
</body>
</html>
I am using Google Earth API and I am new to it. I have marked a placemark using kml and added a click event to this. I want to get latitude and longitude values of this placemark. Though I am using getLatitude() and getLongitude() function, but values are not accurate. I want exactly the same values as defined in kml. The values I get differ by points.
Is there any way to to this?
Thanks
Shubhra
I have the following sample for you. It fetches a kml file and attaches a click event to the placemark. Alerted latitude and longitude values are exactly the same as kml file. Hope it helps.
<html>
<head>
<title>sample.html</title>
<script src="http://www.google.com/jsapi?key=ABQIAAAAwbkbZLyhsmTCWXbTcjbgbRSzHs7K5SvaUdm8ua-Xxy_-2dYwMxQMhnagaawTo7L1FE1-amhuQxIlXw"></script>
<script type="text/javascript">
var ge;
google.load('earth', '1');
function init() {
google.earth.createInstance('map3d', initCB, failureCB);
}
function initCB(instance) {
ge = instance;
ge.getWindow().setVisibility(true);
var href = 'http://code.google.com/'
+ 'apis/earth/documentation/samples/kml_example.kml';
google.earth.fetchKml(ge, href, function(kmlObject) {
if (kmlObject)
{
ge.getFeatures().appendChild(kmlObject);
google.earth.addEventListener(kmlObject, 'click', function(event) {
var placemark = event.getTarget();
alert('Latitude :' + placemark.getGeometry().getLatitude()
+' Longitude :' + placemark.getGeometry().getLongitude());
});
}
if (kmlObject.getAbstractView() !== null)
ge.getView().setAbstractView(kmlObject.getAbstractView());
});
}
function failureCB(errorCode) {
}
google.setOnLoadCallback(init);
</script>
</head>
<body>
<div id="map3d" style="border: 1px solid silver; height: 400px; width: 600px;"> </div>
</body>
</html>
(using Raphael_2.01, WindowsXP, Firefox8.0.1)
Hello,
I'm trying to change the letter color of text by referring to "Drawing Text" of
http://www.html5rocks.com/en/tutorials/raphael/intro/ .
I can display the text "HTML5ROCKS" but I can't change the color.
var t = paper.text(50, 10, "HTML5ROCKS");
var letters = paper.print(50, 50, "HTML5ROCKS", paper.getFont("Courier"), 40);
// I think "Vegur" is Mac font. So I change it to "Courier".
letters[4].attr({fill:"orange"});
for (var i = 5; i < letters.length; i++) {
letters[i].attr({fill: "#3D5C9D", "stroke-width": "2", stroke: "#3D5C9D"});
}
What happened ?
As the tutorial states (not as clearly as it should), you need to convert the font into the "cufon" format if you want to treat the individual letters as unique SVG paths. If you do that, the paper.print function works as expected. Without that the print function returns an empty array (and the "letters[4]" crashes).
Experimentally, I grabbed the two missing font files from html5rocks:
<script src="Vegur.font.js"></script>
<script src="cufon.js"></script>
and added them to a sample HTML page:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Raphaël—JavaScript Library</title>
</head>
<body>
<div id="demo-1"></div>
<script src="raphael.js" type="text/javascript"></script>
<script src="Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>
<script src="Scripts/Vegur.font.js" type="text/javascript"></script>
<script src="Scripts/cufon.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
var paper = Raphael("demo-1", 320, 200);
var t = paper.text(50, 10, "HTML5ROCKS");
var letters = paper.print(50, 50, "HTML5ROCKS", paper.getFont("Vegur"), 40);
letters[4].attr({ fill: "orange" });
for (var i = 5; i < letters.length; i++) {
letters[i].attr({ fill: "#3D5C9D", "stroke-width": "2", stroke: "#3D5C9D" });
}
});
</script>
</body>
</html>
The second HTML5ROCKS text is colored as expected (as shown on the original tutorial page).