移动和扩展图像以填充视口过渡
Move and expand image to fill viewport transition
我正在构建一个过渡,我想在其中放大缩略图以在单击时填充视口。
目前,我在根据视口及其大小找到合适的比例方面进行了正确的计算,但是在 scaled/expanded 之后,我在将图像置于视口中心时遇到了问题。
我只有在使用 transform-origin: center center;
并且图像位于固定全屏容器的中心时才会遇到问题。 Here is a jsfiddle showing my problem.
我还制作了一个 jsfiddle 来展示没有居中的情况。这接近我想要的,除了我希望能够从其他位置而不是左上角转换图像。
这是我目前的代码
// Helper fucntions
const getWindowWidth = () => {
return Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
}
const getWindowHeight = () => {
return Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
}
// Get element
const El = document.getElementById('test');
// Add listener
El.addEventListener('click', () => {
// Viewport size
const viewH = getWindowHeight();
const viewW = getWindowWidth();
// El size
const elHeight = El.offsetHeight;
const elWidth = El.offsetWidth;
// Scale ratio
let scale = 1;
// Get how much element need to scale
// to fill viewport
// Based on
if ((viewW / viewH) > (elWidth / elHeight)) {
scale = viewW / elWidth;
} else {
scale = viewH / elHeight;
}
// Center element
const x = ((viewW - ((elWidth) * scale)) / 2);
const y = ((viewH - ((elHeight) * scale)) / 2);
// matrix(scaleX(),skewY(),skewX(),scaleY(),translateX(),translateY())
El.style.transform = 'matrix(' + scale + ', 0, 0, ' + scale + ', ' + x + ', ' + y + ')';
});
还有一些 css:
.Container {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
#El {
position: absolute;
top: 50%;
left: 50%;
width: 50%;
transform-origin: center center;
transform: translate(-50%, -50%);
transition: transform .3s ease-in-out;
}
最好的解决方案是获取所单击缩略图的当前位置(并不总是居中),然后按比例缩放以填满屏幕。但我不确定从哪里开始才能做到这一点。
这是您想要的效果吗?
CSS:
.Container {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
#test {
position: absolute;
top: 50%;
left: 50%;
width: 50%;
transform: translate(-50%, -50%);
transition: all 3.3s ease-in-out;
}
#test.rdy{
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
}
JS:
// Helper fucntions
const getWindowWidth = () => {
return Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
}
const getWindowHeight = () => {
return Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
}
const El = document.getElementById('test');
El.addEventListener('click', () => {
const viewH = getWindowHeight();
const viewW = getWindowWidth();
const elHeight = El.offsetHeight;
const elWidth = El.offsetWidth;
let scale = 1;
if ((viewW / viewH) > (elWidth / elHeight)) {
scale = viewW / elWidth;
} else {
scale = viewH / elHeight;
}
El.style.width = elWidth * scale + 'px';
El.style.height = elHeight * scale + 'px';
//Add .rdy class in case that position needs resetting :)
document.getElementById('test').className += ' rdy';
});
//A hack to make height transition work :)
window.onload = function(){
El.style.height = El.offsetHeight + 'px';
};
我正在构建一个过渡,我想在其中放大缩略图以在单击时填充视口。
目前,我在根据视口及其大小找到合适的比例方面进行了正确的计算,但是在 scaled/expanded 之后,我在将图像置于视口中心时遇到了问题。
我只有在使用 transform-origin: center center;
并且图像位于固定全屏容器的中心时才会遇到问题。 Here is a jsfiddle showing my problem.
我还制作了一个 jsfiddle 来展示没有居中的情况。这接近我想要的,除了我希望能够从其他位置而不是左上角转换图像。
这是我目前的代码
// Helper fucntions
const getWindowWidth = () => {
return Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
}
const getWindowHeight = () => {
return Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
}
// Get element
const El = document.getElementById('test');
// Add listener
El.addEventListener('click', () => {
// Viewport size
const viewH = getWindowHeight();
const viewW = getWindowWidth();
// El size
const elHeight = El.offsetHeight;
const elWidth = El.offsetWidth;
// Scale ratio
let scale = 1;
// Get how much element need to scale
// to fill viewport
// Based on
if ((viewW / viewH) > (elWidth / elHeight)) {
scale = viewW / elWidth;
} else {
scale = viewH / elHeight;
}
// Center element
const x = ((viewW - ((elWidth) * scale)) / 2);
const y = ((viewH - ((elHeight) * scale)) / 2);
// matrix(scaleX(),skewY(),skewX(),scaleY(),translateX(),translateY())
El.style.transform = 'matrix(' + scale + ', 0, 0, ' + scale + ', ' + x + ', ' + y + ')';
});
还有一些 css:
.Container {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
#El {
position: absolute;
top: 50%;
left: 50%;
width: 50%;
transform-origin: center center;
transform: translate(-50%, -50%);
transition: transform .3s ease-in-out;
}
最好的解决方案是获取所单击缩略图的当前位置(并不总是居中),然后按比例缩放以填满屏幕。但我不确定从哪里开始才能做到这一点。
这是您想要的效果吗?
CSS:
.Container {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
#test {
position: absolute;
top: 50%;
left: 50%;
width: 50%;
transform: translate(-50%, -50%);
transition: all 3.3s ease-in-out;
}
#test.rdy{
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
}
JS:
// Helper fucntions
const getWindowWidth = () => {
return Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
}
const getWindowHeight = () => {
return Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
}
const El = document.getElementById('test');
El.addEventListener('click', () => {
const viewH = getWindowHeight();
const viewW = getWindowWidth();
const elHeight = El.offsetHeight;
const elWidth = El.offsetWidth;
let scale = 1;
if ((viewW / viewH) > (elWidth / elHeight)) {
scale = viewW / elWidth;
} else {
scale = viewH / elHeight;
}
El.style.width = elWidth * scale + 'px';
El.style.height = elHeight * scale + 'px';
//Add .rdy class in case that position needs resetting :)
document.getElementById('test').className += ' rdy';
});
//A hack to make height transition work :)
window.onload = function(){
El.style.height = El.offsetHeight + 'px';
};