I'm looking for a way to obtain ID (123 in the code below) of a Konva Label ("Hello World!" in the code below) from Konva's 'dblclick' event.
I could obtain ID (321 in the code below) of a Konva Image (Konva's LOGO "K" in the code below) from both of Konva's 'dblclick' and 'dragmove' events.
Also I could obtain the ID (123 in the code below) of the Konva Label ("Hello World!") from 'dragmove' event; however I couldn't obtain the ID (123 in the code below) of the Konva Label ("Hello World!") from Konva's 'dblclick' event.
My code:
<!DOCTYPE html>
<html>
<head>
<script src="https://unpkg.com/konva#5.0.2/konva.min.js"></script>
<meta charset="utf-8" />
</head>
<body>
<span id="container"></span>
</body>
<script>
//Konva Stage
var stage = new Konva.Stage({
container: 'container',
width: window.innerWidth,
height: window.innerHeight,
});
//Konva Layer
var layer = new Konva.Layer();
stage.add(layer);
//Konva Image
var imageObj = new Image();
imageObj.src = 'https://raw.githubusercontent.com/konvajs/konvajs.github.io/master/apple-touch-icon-180x180.png';
imageObj.addEventListener('load', function() {
var kImage = new Konva.Image({
x: window.innerWidth*2.5/10,
y: window.innerHeight*1/10,
image: imageObj,
id: 321,
draggable: true,
});
layer.add(kImage);
layer.draw();
});
//Konva Label
WordLabel = new Konva.Label({
x: window.innerWidth*3/10,
y: window.innerHeight*4/10,
opacity: 0.75,
draggable: true,
fill: 'green',
id: 123,
});
//Konva Tag
WordLabel.add(
new Konva.Tag({
fill: 'green',
})
);
//Konva Text
WordLabel.add(
new Konva.Text({
text: 'Hello World!',
fontFamily: 'Calibri',
fontSize: 18,
padding: 5,
fill: 'white',
strokeWidth: 0,
})
);
layer.add(WordLabel);
layer.draw();
//Konva dragstart event
stage.on('dragstart', function(e) {
console.log('ID (dragstart) = ' + parseInt(e.target.id()));
});
//Konva dblclick event
stage.on('dblclick dbltap', function (e) {
console.log('ID (dblclick) = ' +parseInt(e.target.id()));
});
</script>
</html>
If you look at the e.target object you can see that it is the text node rather than the label node that received the click.
Use e.target.findAncestors (see shape API) to get and iterate the shape hierarchy looking for an ancestor shape with the ID attribute you seek.
Working snippet below.
//Konva Stage
var stage = new Konva.Stage({
container: 'container',
width: window.innerWidth,
height: window.innerHeight,
});
//Konva Layer
var layer = new Konva.Layer();
stage.add(layer);
//Konva Image
var imageObj = new Image();
imageObj.src = 'https://raw.githubusercontent.com/konvajs/konvajs.github.io/master/apple-touch-icon-180x180.png';
imageObj.addEventListener('load', function() {
var kImage = new Konva.Image({
x: window.innerWidth*2.5/10,
y: window.innerHeight*1/10,
image: imageObj,
id: 321,
draggable: true,
});
layer.add(kImage);
layer.draw();
});
//Konva Label
WordLabel = new Konva.Label({
x: 10,
y: 20,
opacity: 0.75,
draggable: true,
fill: 'green',
id: 123,
});
//Konva Tag
WordLabel.add(
new Konva.Tag({
fill: 'green'
})
);
//Konva Text
WordLabel.add(
new Konva.Text({
text: 'Hello World!',
fontFamily: 'Calibri',
fontSize: 18,
padding: 5,
fill: 'white',
strokeWidth: 0
})
);
layer.add(WordLabel);
layer.draw();
//Konva dragstart event
stage.on('dragstart', function(e) {
console.log('ID (dragstart) = ' + parseInt(e.target.id()));
});
//Konva dblclick event
stage.on('dblclick dbltap', function (e) {
// Looking for a specif attr on a parent shape. In this
// case we know the parent is a Label so search for ancestors of that type
var nodes = e.target.findAncestors('Label', true);
if (nodes.length > 0) {
for (var i = 0; i < nodes.length; i++){
var id = nodes[i].getAttr("id")
console.log('shape ' + i + ' ID (dblclick)', id )
}
}
else {
console.log('ID (dblclick) = ' + parseInt(e.target.id()));
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<script src="https://unpkg.com/konva#5.0.2/konva.min.js"></script>
<meta charset="utf-8" />
</head>
<body>
<span id="container"></span>
</body>
<script>
</script>
</html>
Related
I habe a problem that the zoom function in the new 5.0.0 version doesn't zoom like bevor.
I have tested the new Version 5.0.0 with the follwing test:
See this jsfiddle.
I change the .jsfile to:
http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v5.0.0.min.js
and make the changes for the new scale function:
ui.stage.setScale(newscale); --> ui.stage.setScale({x:newscale,y:newscale});
The error is that the zoompoint in 5.0.0 is the left top corner and not the mousepoint liek bevor.
Any suggestions ?
Just change this if you are using kinetic.jsv5.0.0
You can also view all the changes made in Kinetic.jsv5.0.0
ui.stage.setScale(newscale); --> ui.stage.setScale({x:newscale,y:newscale});
and
ui.stage.setOffset(ui.origin.x,ui.origin.y); --> ui.stage.setOffset({x: ui.origin.x, y: ui.origin.y});
or
Apply the following code:
var ui = {
stage: null,
scale: 1,
zoomFactor: 1.1,
origin: {
x: 0,
y: 0
},
zoom: function(event) {
event.preventDefault();
var evt = event.originalEvent,
mx = evt.clientX - ui.stage.getX(),
my = evt.clientY - ui.stage.getY(),
zoom = (ui.zoomFactor - (evt.wheelDelta < 0 ? 0.2 : 0)),
newscale = ui.scale * zoom;
ui.origin.x = mx / ui.scale + ui.origin.x - mx / newscale;
ui.origin.y = my / ui.scale + ui.origin.y - my / newscale;
ui.stage.setOffset({x: ui.origin.x, y: ui.origin.y});
ui.stage.setScale({x: newscale, y: newscale});
ui.stage.draw();
ui.scale *= zoom;
}
};
$(function() {
var width = $(document).width() - 2,
height = $(document).height() - 5;
var stage = ui.stage = new Kinetic.Stage({
container: 'container',
width: width,
height: height,
draggable: true
});
var layer = new Kinetic.Layer();
var box1 = ui.box = new Kinetic.Circle({
x: 50,
y: 50,
radius: 50,
fill: '#00D200',
stroke: 'black',
strokeWidth: 2,
draggable: true
});
var box2 = ui.box = new Kinetic.Circle({
x: 150,
y: 150,
radius: 50,
fill: 'red',
stroke: 'black',
strokeWidth: 2,
draggable: true
});
// add cursor styling
box1.on('mouseover', function() {
document.body.style.cursor = 'pointer';
});
box1.on('mouseout', function() {
document.body.style.cursor = 'default';
});
// add cursor styling
box2.on('mouseover', function() {
document.body.style.cursor = 'pointer';
});
box2.on('mouseout', function() {
document.body.style.cursor = 'default';
});
layer.add(box1);
layer.add(box2);
stage.add(layer);
$(stage.content).on('mousewheel', ui.zoom);
});
JSFiddle: http://jsfiddle.net/bijaybhandari1989/6J8F5/4/
I have a situation, the images moving left to right and viceversa, after a certain bound area the images have to hide(invisible) from the stage and when they return back it should be visible. My tween is like this :
var tween = new Kinetic.Tween({
node: puzzle,
duration: 22,
x: puzzle.getX()+700,
easing: Kinetic.Easings.Linear,
onFinish : function(){
this.reverse();
}
});
anyone please help me. Thanks in advance.
Use clipping regions
You can put your puzzle object on a group and set a clipping region on that group.
When your puzzle moves out of the group's clipping region it will not be displayed.
Demo: http://jsfiddle.net/m1erickson/hzTM7/
<!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-v4.7.2.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 group=new Kinetic.Group({
clip:{x:50,y:50,width:100,height:100},
});
layer.add(group);
var bk=new Kinetic.Rect({
x:50,
y:50,
width:100,
height:100,
fill:"blue",
opacity:0.10,
});
group.add(bk);
var circle1 = new Kinetic.Circle({
x:70,
y:70,
radius: 15,
fill: 'red',
stroke: 'black',
strokeWidth: 4,
});
group.add(circle1);
layer.draw();
var tween = new Kinetic.Tween({
node: circle1,
duration: 2,
x: circle1.getX()+120,
easing: Kinetic.Easings.Linear,
onFinish : function(){
this.reverse();
}
});
$("#myButton").click(function(){ tween.play(); });
}); // end $(function(){});
</script>
</head>
<body>
<button id="myButton">Tween</button>
<div id="container"></div>
</body>
</html>
So my problem seems to be that a draggable object always is drawn over other objects.
Check out my fiddle.
and my code:
<!DOCTYPE HTML>
<html>
<head>
<style>
body {
margin: 0px;
padding: 0px;
}
canvas {
border: 1px solid #9C9898;
}
</style>
<script src="http://www.html5canvastutorials.com/libraries/kinetic-v4.3.1-beta.js"></script>
<script>
window.onload = function() {
var stage = new Kinetic.Stage({
container: 'container',
width: 578,
height: 200
});
var cableLayer = new Kinetic.Layer();
// build cable
var cable = new Kinetic.Line({
strokeWidth: 40,
stroke: 'green',
points: [{
x: stage.getWidth() / 2,
y: stage.getHeight() / 2
}, {
x: 100,
y: 100
}],
draggable: true
});
// build center
var c1 = new Kinetic.Circle({
radius: 60,
fill: 'black',
draggable: true,
x: stage.getWidth() / 2,
y: stage.getHeight() / 2
});
var c2 = new Kinetic.Circle({
x: 100,
y: 100,
radius: 60,
fill: 'black',
draggable: true,
});
//add everything to the layer
cableLayer.add(cable);
cableLayer.add(c1);
cableLayer.add(c2);
//add all to stage
stage.add(cableLayer);
//What to do when something is changed...
cable.on('dragmove', (function () {
c1.setPosition([cable.getPosition().x + cable.getPoints()[0].x, cable.getPosition().y + cable.getPoints()[0].y]);
c2.setPosition([cable.getPosition().x + cable.getPoints()[1].x, cable.getPosition().y + cable.getPoints()[1].y]);
cableLayer.draw();
}));
c1.on('dragstart', (function () {
c1.getLayer().afterDraw(function () {
cable.attrs.points[0].x = c1.getX()-cable.getX();
cable.attrs.points[0].y = c1.getY()-cable.getY();
cableLayer.draw();
});
}));
c2.on('dragstart', (function () {
c2.getLayer().afterDraw(function () {
cable.attrs.points[1].x = c2.getX()-cable.getX();
cable.attrs.points[1].y = c2.getY()-cable.getY();
cableLayer.draw();
});
}));
}
</script>
</head>
<body onmousedown="return false;">
<div id="container"></div>
</body>
</html>
So, I tried to set the index using
cable.on('dragmove', (function () {
c1.setPosition([cable.getPosition().x + cable.getPoints()[0].x, cable.getPosition().y + cable.getPoints()[0].y]);
c2.setPosition([cable.getPosition().x + cable.getPoints()[1].x, cable.getPosition().y + cable.getPoints()[1].y]);
c2.setIndex(1);
c1.setIndex(1);
cable.setIndex(2);
cableLayer.draw();
}));
Doesn't seem to work? Why is this? How do I get the circles to draw over the line in all cases? Mainly the case that you drag the line.
Is there somewhere I'm setting this differently somewhere else?
Thanks for your help
http://jsfiddle.net/nYHrg/3/
So the problem is that kineticjs (4.3.0) added a new 'drag' layer to improve dragging performance. Any time that you drag an object, it is put in the drag layer, and when you stop dragging, it is put back in it's own layer. This does not preserve your original z-index. Anytime you create a new object and you want to override this functionality you will have to set one of the attributes of the object as:
"dragOnTop: false"
see jsfiddle for exact implementation.
I am using KineticJs to create shapes with some text label(draggable along with the shape). There wasn't any info on the tutorial. Neither did I find this a very clean approach. What's a good approach to do so? The code below only creates the shape.
HTML:
<html>
<body>
<div id="container"> </div>
<button id="new_state">New State</button>
</body>
</html>
JS:
$(document).bind("ready", function () {
stage = new Kinetic.Stage({
container: 'container',
width: 600,
height: 500
});
layer = new Kinetic.Layer();
$('#new_state').click(function() {
newState();
});
});
newState = function() {
var circle = new Kinetic.Circle({
x: stage.getWidth()/2,
y: stage.getHeight()/2,
radius: 20,
fill: 'white',
stroke: 'black',
strokeWidth: 2,
text: 'tet',
draggable: true
});
circle.on('mouseover', function() {
$('body').css('cursor', 'pointer');
});
circle.on('mouseout', function() {
$('body').css('cursor', 'default');
});
layer.add(circle);
stage.add(layer);
};
JsFiddle here
You just need to add both the circle and text to a group and make the group draggable.
When grouped, the objects act as one item.
var group = new Kinetic.Group({
draggable: true
});
group.add(circle);
group.add(text);
then add the group to the layer
layer.add(group);
http://jsfiddle.net/e8KwC/1/
I have a grid and I'm looking to basically add a tooltip Image for each rectangle in the grid. Basically, first I need to be able to add an image to the canvas on the rectangle mouse over event. Eventually each rectangle would have it's own image so I need to keep track of the rectangles...do I add them to an array?
Here is my fiddle for what I've got so far:
http://jsfiddle.net/marseilles84/7ZzTh/1/
Here is a sample image source to use:
'http://www.html5canvastutorials.com/demos/assets/yoda.jpg';
<div id="container"></div>
var stage = new Kinetic.Stage({
container: 'container',
width: 1000,
height: 500
});
var layer = new Kinetic.Layer();
for (var i=0; i<7; i++)
{
for(c=0; c<18; c++)
{
var colorPentagon = new Kinetic.Rect({
x: (45*c),
y: 45*i,
width:40,
height:40,
fill: 'red',
stroke: 'black',
strokeWidth: 4,
draggable: true
});
colorPentagon.on('mouseover touchstart', function() {
//code here
});
layer.add(colorPentagon);
}
}
stage.add(layer);
http://jsfiddle.net/7ZzTh/2/
This is probably more of what you're looking for.
colorPentagon.on('mouseover touchstart', function() {
var userPos = stage.getUserPosition();
yoda.setPosition(userPos.x,userPos.y);
layer.add(yoda);
layer.draw();
});
colorPentagon.on('mouseout touchstart', function() {
yoda.remove();
layer.draw();
});
At the beginning you want:
var imageObj = new Image();
var yoda = new Kinetic.Image({
x: 0,
y: 0,
image: imageObj,
width: 106,
height: 118
});
imageObj.src = 'http://www.html5canvastutorials.com/demos/assets/yoda.jpg';