In my Cocos2d js android app i have a UI button as
var button=new ccui.Button();
button.loadTextures(res.play_png,res.play_png);
button.setAnchorPoint(cc.p(0,0));
button.x=size.width/2;
button.y=size.height/2;
this.addChild(button);
The button loads and i am able to set it at any position on the screen.
But i am unable to change its width and height to specified number of pixels.
I want something like
button.width=100;
button.height=100;
I did not find any method to do that...
Any help how to accomplish this would be greatful.
Thanks.
The buttons i use are options like play,how to play,share etc..
So i have to position them in such a way that they dont overlap or get distorted for various screen resolutions...
How can i use the setScale method in this context???
We can make a call to a function that can scale the size of the UIButton by performing an action. In this case, the following code might help:
performScaleAction : function()
{
var duration = 0; // duration in seconds for performing this action
var scaleX = 0.5; // scale factor for X-axis
var scaleY = 0.5; // scale factor for Y-axis
var scaleAction = new cc.ScaleTo(duration , scaleX , scaleY );
this.runAction(scaleAction);
}
Now, call the above function in the following way:
this.performScaleAction();
this.addChild(button);
So, if the actual height of the image used for creating the UIButton is h, in this case, the new size as displayed on the screen would be h times scaleX . Same for the width of the UIButton.
Hope this helps!
Related
So I'm developing a cross platform React Native app, the app is using allot of images as buttons as per design requirements that need to be given an initial height and width so that their aspect ratios are correct. From there I've built components that use these image buttons and then placed those components on the main screen. I can get things to look perfect on one screen by using tops and lefts/ rights to get the components positioned according to the design requirements that I've been given.
The problem I'm running into is now scaling this main screen for different screen sizes. I'm basically scaling the x and y via the transform property on the parent most view as such. transform: [{ scaleX: .8 }, { scaleY: .8 }] After writing a scaling function that accounts for a base height and current height this approach works for the actual size of things but my positioning is all screwy.
I know I'm going about this wrong and am starting to think that i need to rethink my approach but am stumped on how to get these components positioned correctly on each screen without having to hard code it.
Is there any way to position a view using tops and lefts/rights, lock that in place, then scale it more like an image?
First of all, try using flex as far as you can. Then when you need extra scaling for inner parts for example, you can use scale functions. I have been using a scale function based on the screen size and the pixel density, and works almost flawless so far.
import { Dimensions } from "react-native";
const { width, height } = Dimensions.get("window");
//Guideline sizes are based on standard ~5" screen mobile device
const guidelineBaseWidth = 350;
const guidelineBaseHeight = 680;
const screenSize = Math.sqrt(width * height) / 100;
const scale = size => (width / guidelineBaseWidth) * size;
const verticalScale = size => (height / guidelineBaseHeight) * size;
const moderateScale = (size, factor = 0.5) =>
size + (scale(size) - size) * factor;
export { scale, verticalScale, moderateScale, screenSize };
Then you can import these and use in your components. There are different types of scales, you can try and see the best one for your components.Hope that helps.
I ended up going through each view and converting everything that was using a hard coded height and width pixel to setting the width and then using the property aspectRatio and giving that the hard coded height and widths. That along with implementing a scaling function that gave me a fraction of the largest view, so say .9, and then scaling the main view using transform. People arent kidding when they say this responsive ui stuff is tough.
2022 update -
I resolved this problem on my next app by using flex everywhere & a function called rem that I use everywhere that needs a fixed pixel count. With this I can set the width on an image and define an aspect ratio based on the images original dimensions and get an image that scales to the screen size, it's been super reliable.
static width = Dimensions.get("window").width;
static height = Dimensions.get("window").height;
static orientation = 'PORTRAIT';
static maxWidth = 428;
static rem = size => {
let divisor = window.lockedToPortrait || Styles.orientation === 'PORTRAIT' ? Styles.width : Styles.height;
return Math.floor(size * (divisor / Styles.maxWidth))
};
The maxWidth is a predefined value from the largest device I could find to simulate which was probably an iPhone max.
I was created a new project using flash cc html5 canvas and created a movieclip with 200px width and 200px height. I can able to get the properties using this.mc.nominalBounds;. And I tried this.mc.getBounds ();
But it returns null. setBounds also not seems to work.
The setBounds method is for putting a custom bounds on something, or defining it when it can not be determined (like using the Graphics classes). Fortunately, all symbols from Flash CC come with nominalBounds, which is the combined, untransformed size of the symbol.
Using that, you can set the scaleX and scaleY properties to size up and down your content. If you want it to be a specific width, just use the nominalBounds to determine a new scale.
For example, if the clip is 200x200, and you want it to be 400x400, then:
var scale = newWidth / nominalBounds.width;
clip.scaleX = clip.scaleY = scale;
Hope that helps!
Setup a simple scene here:
http://jsfiddle.net/majman/Sps3c/
I was initially trying to demonstrate a problem I was having with rotating a parent container while having the camera maintain it's relative offset position, but when setting up this example I couldn't even adjust the camera's initial position.
Current Problem:
// camera
camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 5, 150);
camera.position.z = 50; // this doesn't work?
// object to contain camera & helper
cameraContainer = new THREE.Object3D();
cameraContainer.rotation.order = "YXZ"; // maybe not necessary
// add to container
cameraContainer.add(camera);
scene.add(cameraContainer);
Now when rotating the cameraContainer, the camera's rotation follows - but I'd like the camera's position to be offset from the cameraContainer. I'm unable to modify any position properties for some reason.
Your code is working fine. You are confused because the CameraHelper is not displaying the camera in its actual position. You need to add the CameraHelper as a child of the scene.
// camera helper
cameraHelper = new THREE.CameraHelper( camera2 );
scene.add( cameraHelper );
updated fiddle: http://jsfiddle.net/Sps3c/1/
Tip: I added an OrbitController to your demo for a better view of the situation.
three.js r.66
I use scrollviewer in my windows store application, but after calling SetHorizontalOffset function some times scrollviewer doesn't change horizontal scrolling. The same thing with vertical scrolling. Does anybody know how to work with it? May be scrollviewer scroll only for visibility for offset (I mean that if it's see that user can see offset its doesn't scroll at all)
It appears the ScrollViewer's offset lags by one frame.
If the below code is run every frame, diffPrevDesiredActual is always 0. That is to say, the value provided by ChangeView does not take affect immediately.
...
var scrollPosition = /*some new value*/;
MyScrollViewer.ChangeView(null, scrollPosition, null, true);
var current = MyScrollViewer.VerticalOffset;
var diffDesiredActual = scrollPosition - current;
var diffPrevDesiredActual = previous - current;
previous = scrollPosition;
...
private double previous;
If nothing on your screen is animating when you change the scroll offset, then it is possible the ScrollViewer won't show the new value until something triggers the draw of a new frame. To test this hypothesis, try adding an infinite animation (eg ProgressRing) to ensure frames are constantly being drawn.
I have a responsive layout and I am using sticky.js for my header. This seems to be working minus a few glitches that I can live with. But my anchors are always off (I am using smooth scrolling). I am not sure how to compensate for the sticky header when scrolling to an anchor when the responsive layout is constantly changing the width and height?
Unfortunately there is not a whole lot you can do with straight-CSS which won't distort your design. To tackle this issue in previous projects, I have used jQuery to handle these types of scrolling/anchor issues.
What You Have Now: <a> tags that look for id's on the page. The problem is this: when the site goes responsive, those anchor tags don't line up so nicely with your DOM layout.
My Solution: To give you the high level concept - I used jQuery to modify the ID positions on the fly. Say you click on a link when the site is full-size, and everything is fine. jQuery is not needed here. Now say that when you click that same link when the site was scaled to about the 768px-width range (iPad portrait): then my anchors might look as if they were about 100px off (for example). I wrote a bit of jQuery to handle this: "If the width is __, then offset the anchor ID's by ___px."
I would recommend using JS to account for the difference at time-of-scroll, rather than trying to artificially alter the height property of your anchor tags. Here's a function that might work for you, using pure JS:
adjustScroll = function () {
// Sticky nav selector (you'll have to provide your own selector)
const nav = document.querySelector('header>nav');
if (location.href.indexOf("#") >= 0) {
// Find the name of the anchor
let n = location.href.substr(location.href.indexOf("#")+1);
// Find the anchor by name, if it exists
let a = document.querySelector('a[name="'+n+'"]');
if (!a) {
return;
}
// Set y value as y-value of the anchor, offset by the header height
let y = a.offsetTop;
y -= nav.height + 10;
// Scroll to the y position
window.scrollTo(0, y);
}
}
// Call it wherever you need to call it
adjustScroll();
Examples of where to call it might be on a DOMContentLoaded event, or on an onclick event for anchor tags.