Is it possible to change the background with an image fading in after a set time?
I am using the following code, but the image is not fading in. All I am achieving now is fading out the image with the transitionTo method, however I want it to fade in.
This is the code I am playing with:
var stage = new Kinetic.Stage({
container: 'container',
width: 1770,
height: 900
});
var layer = new Kinetic.Layer();
var imageObj = new Image();
imageObj.onload = function() {
var myBg = new Kinetic.Image({
x: 0,
y: 0,
image: imageObj,
width: 1770,
height: 900
});
// add the shape to the layer
layer.add(myBg);
// add the layer to the stage
stage.add(layer);
setTimeout(function() {
myBg.transitionTo({
opacity: 0,
duration: 4,
});
}, 3000);
};
imageObj.src = 'bg.png';
Can someone kindly shed some light?
It happens because you did not set initial opacity. What you were doing is setting opacity from 1 to 1, not from 0 to 1. please refer the following code.
var myBg = new Kinetic.Image({
x: 0,
y: 0,
image: imageObj,
opacity: 0,
width: 1770,
height: 900
});
myBg.transitionTo({
opacity: 1,
duration: 4,
})
Related
In the following example I have two shapes, a rectangle and a semitransparent circle:
http://jsfiddle.net/cequiel/zZ22s/
var stage = new Kinetic.Stage({
container: 'canvas',
width: 800,
height: 600
});
var layer = new Kinetic.Layer();
// adds a rectangle
var rect = new Kinetic.Rect({
x: 100,
y: 50,
width: 200,
height: 150,
fill: 'yellow',
stroke: 'black'
});
rect.on('mousedown', function() {
$('#text').text('mouse down');
}).on('mouseup', function() {
$('#text').text('mouse up');
}).on('mouseenter', function() {
$('body').css('cursor', 'pointer');
$('#text').text('mouse enter');
}).on('mouseleave', function() {
$('body').css('cursor', 'default');
$('#text').text('mouse leave');
});
layer.add(rect);
// adds a semitransparent circle
var circ = new Kinetic.Circle({
x: 300,
y: 125,
radius: 60,
fill: 'green',
stroke: 'black',
opacity: 0.2,
locked: true
});
layer.add(circ);
stage.add(layer);
The rectangle captures the mouse down, up, enter and leave events. But when the mouse is over the circle, the rectangle doesn't receive any event. And this is fine. But, how could I avoid this? I mean, how could I make the circle "invisible" to the mouse events? I'm looking for something similar to the 'mouseEnabled' property defined in AS3:
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/InteractiveObject.html#mouseEnabled
Thanks.
You can instruct any shape to temporarily stop listening for events like this:
myShape.setListening(false);
I have two views displayed in a window as follows
var topView = Ti.UI.createView({
top: 0,
height: '65%',
orientation: 'vertical'
});
var botView = Ti.UI.createView({
bottom: 0,
height: '35%',
layout: 'vertical'
});
i want to animate as follows:
when a button is clicked, topView increases to hundred percent while botView decreases to 0 percent. and the reverse happens when the button is clicked.
But i haven't found a way to do it for two views.
I hope someone can help out.
Thanks -:)
EDIT:
This is what i have done so far:
var expandFlag = false;
/* create animations */
var expandAnim_map = Ti.UI.createAnimation({
height : '100%',
duration: 300
});
var expandAnim_con = Ti.UI.createAnimation({
height: '0%',
duration : 300,
bottom:0
});
var collapseAnim_map = Ti.UI.createAnimation({
height: '65%',
duration: 300,
});
var collapseAnim_con = Ti.UI.createAnimation({
height: '35%',
duration: 300,
bottom:0
});
/* create animations */
if (expandFlag) {
botView.animate(collapseAnim_con);
topView.animate(collapseAnim_map);
expandFlag = false;
} else {
topView.animate(expandAnim_map);
botView.animate(expandAnim_con);
expandFlag = true;
}
This is irregular and not beautiful, hence i'm looking for a cleaner and smoother way to do it. Thanks.
I suggest that you animate only one view in order to get a good looking animation.
You can set a higher zIndex for the top view, and then expand and reduce only that view.
var expandFlag = false;
var topView = Ti.UI.createView({
top: 0,
zIndex: 2,
height: '65%',
orientation: 'vertical'
});
var botView = Ti.UI.createView({
bottom: 0,
zIndex: 1,
height: '35%',
layout: 'vertical'
});
/* create animations */
var expandAnim_map = Ti.UI.createAnimation({
height : '100%',
duration: 300
});
var collapseAnim_map = Ti.UI.createAnimation({
height: '65%',
duration: 300,
});
/* create animations */
if (expandFlag) {+
topView.animate(collapseAnim_map);
expandFlag = false;
} else {
topView.animate(expandAnim_map);
expandFlag = true;
}
I currently used KineticJS (version:4.2.0) to do something, but when I want to set corner radius for a kinetic image object, it seems it doesn't work at all. Do anyone have any ideas?
My code is like this:
var stage = new Kinetic.Stage({
container: 'container',
width: 901,
height: 532,
});
var bg = new Kinetic.Layer(); // slot's shell
var bgObj = new Image();
bgObj.onload = function() {
var item = new Kinetic.Image({
x: 0,
y: 0,
width: 901,
height: 532,
image: bgObj,
cornerRadius: 25
});
bg.add(item);
stage.add(bg);
};
bgObj.src = "background.png";
Thanks.
corner radius currently isn't implemented for Image. In fact there's an error with the documentation because only Rectangle supports rounded corners. Images will support rounded corners soon.
I have a problem an hope to find any solution for it.
I am using Kinetic.js to create a HMI solution with special look-and-feel. Therefor I have created a function that creates 3 layers for a stage: a background layer with a grid, a layer with static shapes for the base layout of the HMI-screen and the third layer for all interactive elements (like buttons, valuedisplays and so on...). Now I want to cache the grid and the static layer to improve performance, because this layers will never change until the whole HMI-screen will change...
As a test I started to code the caching for the grid layer using the following code:
// Create a grid layer if showGrid is set to TRUE...
console.log('Start to create background grid if required');
if (this.actualPageConfig.showGrid) {
var grid = new Kinetic.Layer();
for (var x=1; x <= this.cols; x++) {
var eLoc = LCARSElements.posToRealPos(x, 1, this.cols, this.rows);
if (x <= this.actualPageConfig.columns) {
grid.add(new Kinetic.Line({
points: [eLoc.x, eLoc.y, eLoc.x, eLoc.height],
stroke: "red",
strokeWidth: 1,
lineCap: "round",
lineJoin: "round"
}));
}
}
for (var y=1; y <= this.rows; y++) {
var eLoc = LCARSElements.posToRealPos(1, y, this.cols, this.rows);
if (y <= this.actualPageConfig.rows) {
grid.add(new Kinetic.Line({
points: [eLoc.x, eLoc.y, eLoc.width, eLoc.y],
stroke: "red",
strokeWidth: 1,
lineCap: "round",
lineJoin: "round"
}));
}
}
// Add grid layer to stage
//this.stage.add(grid); <-- to be replaced by cache image
// Convert grid into an image and add this to the stage
console.log('convert grid to image to increase performance');
grid.toImage({
width: displayManager.stage.getWidth(),
height: displayManager.stage.getHeight(),
callback: function(img) {
var cacheGrid = new Kinetic.Image({
image: img,
x: 0,
y: 0,
width: displayManager.stage.getWidth(),
height: displayManager.stage.getHeight()
});
console.log('insert grid-image to stage');
displayManager.stage.add(cacheGrid);
console.log('redraw stage...');
displayManager.stage.draw();
}
});
}
My problem is, that's not working. The grid is not visible any more and the console log shows the following error information:
Type error: layer.canvas is undefined
layer.canvas.setSize(this.attrs.width, this.attrs.height); kinetic.js (Zeile 3167)
As I already figured out the error rise when the code "displayManger.stage.add(cacheGrid) will be executed (displayManager is the outside-class where this code snipped reside).
Can anyone see where I made the mistake? When I directly add the layer grid anything works fine...
I have created a jsfiddle to demonstrate the problem: jsfiddle
In fiddle you can run both versions by changing one parameter. Hope this helps....
Thanks for help.
Best regards
Thorsten
Actually, the problem is simpler than you might think - after caching the layer into an image, you're trying to add an image object directly to the stage (you can't do that).
To fix the problem, you need to create a new layer, say cahcedLayer, add the image to cachedLayer, and then add cachedLayer to the stage.
Check out the KineticJS info page to learn more about Node nesting:
https://github.com/ericdrowell/KineticJS/wiki
http://rvillani.com/testes/layer-to-image/
I've made this test and it worked. First, I draw 1000 squares to a layer, add this layer to a hidden stage then make an image from this stage using stage.toDataURL(). When the callback returns, I just create an Image from the data and a Kinetic.Image from the Image. Then I add it to a layer on my main (visible) stage.
Code (be sure to have a div called 'invisible'):
window.onload = function()
{
var stage = new Kinetic.Stage({
width: 520,
height: 480,
container: 'container'
});
var outerStage = new Kinetic.Stage({
width: stage.getWidth(),
height: stage.getHeight(),
container: 'invisible'
});
var layerToCache = new Kinetic.Layer();
var layer = new Kinetic.Layer();
var group = new Kinetic.Group({offset: [stage.getWidth(), stage.getHeight()]});
var anim = new Kinetic.Animation(function(frame){
group.rotate(0.02);
}, layer);
var fills = ['red', 'green', 'blue', 'orange', 'purple', 'cyan',
'black', 'brown', 'forestgreen', 'gray', 'pink'];
for (var i = 0; i < 10000; ++i)
{
(function ()
{
var size = Math.random() * 60 + 20;
var square = new Kinetic.Rect({
width: size,
height: size,
fill: fills[i % fills.length],
x: Math.random() * stage.getWidth() - 20,
y: Math.random() * stage.getHeight() - 20
});
layerToCache.add(square);
})();
}
var squaresImg = new Kinetic.Image();
outerStage.add(layerToCache);
outerStage.toDataURL({
callback: function (dataURL){
outerStage.clear();
var img = new Image();
img.src = dataURL;
img.onload = function () {
squaresImg.setImage(img);
squaresImg.setX(squaresImg.getWidth() >> 1);
squaresImg.setY(squaresImg.getHeight() >> 1);
group.setX(stage.getWidth() >> 1);
group.setY(stage.getHeight() >> 1);
group.add(squaresImg);
layer.add(group);
layer.draw();
anim.start();
}
}
});
var div = document.getElementById('invisible');
div.parentNode.removeChild(div);
stage.add(layer);
}
I want to draw a hexagon and show an image inside that using html5.
I have tried it out but I am not getting image as the result.
I want to use kineticjs only for this.
Here is the code:
function hexagon(){
var stage = new Kinetic.Stage({
container: "container"
});
var layer = new Kinetic.Layer();
var hexagon = new Kinetic.RegularPolygon({
x: 100,
y: 100,
sides: 6,
radius: 100,
fill: {image: "css/images/logo.png"},
stroke: "royalblue",
strokeWidth: 2
});
// add the shape to the layer
layer.add(hexagon);
// add the layer to the stage
stage.add(layer);
}
fill takes an image object. Try the following:
var layer = new Kinetic.Layer();
logo = new Image();
logo.src = "css/images/logo.png";
var hexagon = new Kinetic.RegularPolygon({
x: 100,
y: 100,
sides: 6,
radius: 100,
fill: {image: logo},
stroke: "royalblue",
strokeWidth: 2
});
// add the shape to the layer
layer.add(hexagon);
// add the layer to the stage
stage.add(layer);
}
The author of KinectJS has written some really great tutorials. In this one he draws an image in a pentagon, as well as a few other things. Should be enough to help you.
http://www.html5canvastutorials.com/kineticjs/html5-canvas-set-fill-with-kineticjs/
I have got the solution.
Posting it late (better late than never)
It should be:
fill: {image: "css/images/logo.png", offset: [0, 0]}