Reset to Default position with KineticJS - javascript

I have the following circles in my game. The player drags them into different locations in the game. When the player selects, play again, I want the shapes to go back to the original position stated in the init function. How should I go about this? Thank you.
stage = new Kinetic.Stage({
container: "container",
width: 900,
height: 550
});
shapes = new Kinetic.Layer();
function init() {
circle1 = new Kinetic.Circle({
x: stage.getWidth() / 3.2,
y: stage.getHeight() / 3.2,
radius: radius,
fill: "blue",
stroke: "black",
strokeWidth: 4,
name: "circle",
draggable: true
});
shapes.add(circle1)
stage.add(shapes)

Store defaults in a separate variable, then use .setPosition( x, y ) to reset it:
//store settings
var settings = {
x: stage.getWidth() / 3.2,
y: stage.getHeight() / 3.2,
radius: radius,
fill: "blue",
stroke: "black",
strokeWidth: 4,
name: "circle",
draggable: true
};
//use settings
circle1 = new Kinetic.Circle(settings);
//after move, reset using:
circle1.setPosition(settings.x,settings.y);

you can also use the super handy setAttrs method like this:
circle1.setAttrs(settings);
Cheers!

I know this question is fairly old but I just solved something like this.
stage.removeChildren();
stage.setAttrs(stage.defaultNodeAttrs);
The stage.reset() doesn't work anymore, but this should do what you want.

Related

How to tween view.center in paper.js

So I'm trying to give the feel of smooth movement when reassigning the paper.view.center coordinates. The center object doesn't have a tweenTo() method. This is what I've tried using Tween.js:
let smooth = new TWEEN.Tween(paper.view.center).to({
x: 650,
y: 270
}, 900).easing(TWEEN.Easing.Cubic.Out).start();
Since it's a Point object reassigning the x and y values don't actually change the coordinates, because the proper way of reassiging it is to use another Point object (new paper.Point()). How could I tween the continuously new creation of a Point object?
I think that a simple way of achieving what you want is animating the active layer position.
Here's a sketch demonstrating a possible implementation.
const circle = new Path.Circle({
center: view.center,
radius: 50,
fillColor: 'orange'
});
circle.clone().translate(100)
project.activeLayer.tweenTo(
{ position: { x: 50, y: 50 } },
{ duration: 700, easing: 'easeInOutQuad' }
);

How to pass an event on to the nodes below in kinetics

question that is very similar but answer doesn't work in my situation
I have a circle and I want to pass the click event to any objects that are underneath it.
I have tried:
setting cancelbubble to false.
setting the cirle layer to listening= false doesn't work for me because the circle is then no longer draggable.
I have made a fiddle here
var stage = new Kinetic.Stage({
container: 'container',
width: 578,
height: 400
});
var layer = new Kinetic.Layer();
var background = new Kinetic.Layer();
var colorPentagon = new Kinetic.RegularPolygon({
x: 80,
y: stage.getHeight() / 2,
sides: 5,
radius: 70,
fill: 'red',
stroke: 'black',
strokeWidth: 4,
draggable: true
});
colorPentagon.on('click', function(evt){ alert("pentagon");});
var linearGradPentagon = new Kinetic.RegularPolygon({
x: 360,
y: stage.height()/2,
sides: 5,
radius: 70,
fillLinearGradientStartPoint: {x:-50, y:-50},
fillLinearGradientEndPoint: {x:50,y:50},
fillLinearGradientColorStops: [0, 'red', 1, 'yellow'],
stroke: 'black',
strokeWidth: 4,
draggable: true
});
linearGradPentagon.on('click', function(evt){ alert("pentagon");});
var radialGradPentagon = new Kinetic.RegularPolygon({
x: 500,
y: stage.height()/2,
sides: 5,
radius: 70,
fillRadialGradientEndRadius: 70,
fillRadialGradientColorStops: [0, 'red', 0.5, 'yellow', 1, 'blue'],
stroke: 'black',
strokeWidth: 4,
draggable: true
});
radialGradPentagon.on('click', function(evt){ alert("pentagon");});
background.add(colorPentagon);
//background.add(patternPentagon);
background.add(linearGradPentagon);
background.add(radialGradPentagon);
stage.add(background);
var hideCircle = new Kinetic.Circle({
x: stage.width()/2,
y: stage.height()/2,
radius: 650,
stroke: 'black',
strokeWidth: 1000,
draggable:true
});
hideCircle.on('click', function(evt){ alert("click");});
// add the shape to the layer
layer.add(hideCircle);
// add the layer to the stage
stage.add(layer);
Currently to get it to work I have to take the click coordinates and do my own detection. It works but I was hoping for something more elegant.
Here's how to pass your click event to the bottom layer nodes:
You can listen for clicks on the stage
Determine if the click is inside any node on the bottom layer
If the click was inside a node, fire the click event on that node.
Here's example code and a Demo: http://jsfiddle.net/m1erickson/sFX8y/
stage.on('contentClick',function(e){
// get the mouse position
var pos=stage.getPointerPosition();
// fetch the node on the bottom layer that is under the mouse, if any.
var hitThisNode=background.getIntersection(pos);
// if a node was hit, fire the click event on that node
if(hitThisNode){
hitThisNode.fire("click",e,true);
}
});

Drag while in background in KineticJs

I have two layers generally representing a large background and some content on top of it.
I have made the background draggable but when dragged, it covers the content of the other layer.
Is it possible to keep it in the background while dragging it?
I have tried binding the drag events with .moveToBottom() for the background group (later added to backgroundLayer) like that:
groupBackground.on('dragstart',function(){
groupBackground.moveToBottom();
});
groupBackground.on('dragmove',function(){
groupBackground.moveToBottom();
});
groupBackground.on('dragend',function(){
groupBackground.moveToBottom();
});
but to no result.
You can “draw under” by using the canvas “.globalCompositeOperation”
This will allow your user to drag the background under the foreground.
And you can apply it to KineticJs like this:
layer.getContext().globalCompositeOperation = "destination-over";
Here is code and a Fiddle: http://jsfiddle.net/m1erickson/2GFSE/
var stage = new Kinetic.Stage({
container: 'container',
width: 578,
height: 200
});
var layer = new Kinetic.Layer();
stage.add(layer);
var background = new Kinetic.Rect({
x: stage.getWidth() / 2,
y: stage.getHeight() / 2,
width: 250,
height: 250,
fill: 'black',
stroke: 'black',
strokeWidth: 4,
draggable: true
});
var foreground = new Kinetic.Ellipse({
x: stage.getWidth() / 3,
y: stage.getHeight() / 3,
radius: {
x: 50,
y: 30
},
fill: 'red',
stroke: 'black',
strokeWidth: 4
});
// add the background and foreground to the layer
layer.add(foreground);
layer.draw();
layer.getContext().globalCompositeOperation = "destination-over";
layer.add(background);
layer.draw();

KineticJS / Javascript dynamic creation and immediate dragging

What I want do is dynamically create a shape on mousedown, and then immediately have it (the shape) follow the mouse cursor until mouseup sets it in place.
Here is what I have so far and it's not working for me.
addNegativeButton.on('mousedown', function(){
var userPos = stage.getUserPosition();
shapesLayer.add(new Kinetic.Image({
image: imageObj,
x: userPos.x,
y: userPos.y,
height: 25,
width: 25,
rotation: 1,
draggable: true,
offset: 12
}));
var last = shapesLayer.getChildren()[shapesLayer.getChildren().length -1];
stage.on("mouseup", function(){
last.setAbsolutePosition(stage.getUserPosition());
stage.off("mouseup");
});
To reiterate:
What I have is an 'addNegativeButton' which when clicked creates a shape.
But I want it to follow the mouse cursor until the click is released.
http://jsfiddle.net/CPrEe/37/
Any suggestions?
Turns out its rather simple ;)
After you add the element/shape, all you have to do is use the simulate function to simulate mouse down and it drags....
var stage = new Kinetic.Stage({
container: 'container',
width: 578,
height: 200
});
var layer = new Kinetic.Layer();
var rect = new Kinetic.Rect({
x: 20,
y: 20,
width: 100,
height: 50,
fill: 'green',
stroke: 'black',
strokeWidth: 4
});
//What I really want here is to start dragging the circle until the
//user releases the mouse, which would then place the circle.
rect.on('mousedown', function(evt) {
var userPos = stage.getUserPosition();
var latestElement = new Kinetic.Circle({
x: userPos.x,
y: userPos.y,
radius: 20,
fill: 'red',
stroke: 'black',
strokeWidth: 4,
draggable: true
})
layer.add(latestElement);
// Here's the bit you want. After adding the circle (with draggable:true) simulate the mousedown event on it which will initiate the drag
latestElement.simulate('mousedown');
layer.draw();
});
layer.add(rect);
stage.add(layer);​
http://jsfiddle.net/CPrEe/38/
http://kineticjs.com/docs/symbols/Kinetic.Node.php#simulate

kineticjs rect fillText

I have KineticJS rect already fill with 'blue' color, I want to show Text on this rect box. But my below code not showing anything. Also I need to assign this label text on button click, the code for the same is also below.
drawShape = new Kinetic.Rect({
id: shapeId,
name: shapeName,
x: 0,
y: 0,
width: 150,
height: 40,
fill: "#00D2FF",
stroke: "black",
strokeWidth: 3,
fillText: "Step" + stepNumber
});
function OnApplyPropertiesClick(){
drawShape.fillText(document.getElementById("txtLabel").value);
}
any help on this?? please.
Thanks
Biru
I don't think you can add text to a rectangle object, only a fill type of:
[color, linear gradient, radial gradient, or pattern]
To solve this i created a group, then added a rectangle and text object to it, when i wanted to create a rectangle with text on it:
var group = new Kinetic.Group({
});
var rectangle = new Kinetic.Rect({
x: 5,
y: 5,
width: 80,
height: 35,
fill: "green",
stroke: "black",
strokeWidth: 2
});
var rectangleText = new Kinetic.Text({
x: 15,
y: 10,
text: 'test',
fontSize: 20,
fontFamily: 'Calibri',
textFill: 'black'
});
group.add(rectangle);
group.add(rectangleText);
layer.add(group);
You should be able to adapt your listener to then apply it to this.
I've done a jsfiddle to show what i mean:
http://jsfiddle.net/B85Ff/
Have you added drawShape to any layer yet? Doesn't appear in the snippet you posted.
Also, you need to draw the layer (like a refresh) at the end of your OnApplyPropertiesClick() function.

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