Html 如何使KineticJS帆布舞台响应

在向页面添加画布元素时，我希望画布及其内容随着浏览器窗口的缩小而缩小

这里似乎有几个问题被问到了，每一个问题我都没有找到我想要的答案。我似乎有一些有用的东西，我想我会把它发布给其他人，让他们去击倒或改进

在这个例子中，我有一个最大宽度为1000px的页面。canvas元素在最大宽度下仅为800px宽

HTML:

JavaScript:

var maxStageWidth = 800;
var maxStageHeight = 500;
var maxPageWidth = 1000;

// Check to see if window is less than desired width and calls sizing functions
function setStageWidth() {
    if (window.innerWidth < maxPageWidth) {

        resizeStage();

    } else {

        maxStageSize();

    };
};

// Sets scale and dimensions of stage in relation to window size
function resizeStage() {

    var scalePercentage = window.innerWidth / maxPageWidth;

    stage.setAttr('scaleX', scalePercentage);
    stage.setAttr('scaleY', scalePercentage);
    stage.setAttr('width', maxStageWidth * scalePercentage);
    stage.setAttr('height', maxStageHeight * scalePercentage);
    stage.draw();
};

//Sets scale and dimensions of stage to max settings
function maxStageSize() {
    stage.setAttr('scaleX', 1);
    stage.setAttr('scaleY', 1);
    stage.setAttr('width', maxStageWidth);
    stage.setAttr('height', maxStageHeight);
    stage.draw();
};

var stage = new Kinetic.Stage({
    container: 'container',
    width: maxStageWidth,
    height: maxStageHeight,
    scaleX: 1
});

var circles = new Kinetic.Layer();

var circleRed = new Kinetic.Circle({
    x: stage.getWidth() / 2,
    y: stage.getHeight() / 2,
    radius: 100,
    stroke: 'black',
    strokeWidth: 2,
    fill: 'red'
});

var circleBlue = new Kinetic.Circle({
    x: stage.getWidth() / 2 + 120,
    y: stage.getHeight() / 2 + 175,
    radius: 50,
    stroke: 'black',
    strokeWidth: 2,
    fill: 'blue'
});

var circleOrange = new Kinetic.Circle({
    x: stage.getWidth() / 2 - 175,
    y: stage.getHeight() / 2 + 100,
    radius: 75,
    stroke: 'black',
    strokeWidth: 2,
    fill: 'orange'
});

circles.add(circleRed);
circles.add(circleBlue);
circles.add(circleOrange);

stage.add(circles);

// On load we set stage size based on window size
setStageWidth();

// On window resize we resize the stage size
window.addEventListener('resize', setStageWidth);

var maxStageWidth=800；
var MaxStageHight=500；
var maxPageWidth=1000；
//检查窗口是否小于所需的宽度，并调用大小调整函数
函数setStageWidth（）{
if（window.innerWidth

您的函数似乎没有任何问题。你能解释一下你想做什么吗？你的最大页面宽度和最大舞台宽度不应该是同一个数字吗

您的函数正在做两件事：缩放和调整大小，但您关注的是基于水平变化的缩放。尝试将其更改为对角比例因子或分别缩放垂直和水平

// Sets scale and dimensions of stage in relation to window size
function resizeStage() {

   var horizScalePercentage = window.innerWidth / maxPageWidth; 
   var vertiScalePercentage = window.innerHeight/ maxPageHeight; 

   stage.setAttr('scaleX', horizScalePercentage );
   stage.setAttr('scaleY', vertiScalePercentage );
   stage.setAttr('width', maxStageWidth * horizScalePercentage );
   stage.setAttr('height', maxStageHeight * vertiScalePercentage );
   stage.draw();
};

//Sets scale and dimensions of stage to max settings
function maxStageSize() {
    stage.setAttr('scaleX', 1);
    stage.setAttr('scaleY', 1);
    stage.setAttr('width', maxStageWidth);
    stage.setAttr('height', maxStageHeight);
    stage.draw();
};

---

检查这把小提琴

我的想法是有一个页面，其中画布是文档的唯一组成部分，它的一侧会有内容，因此我的任意80%画布/100%页面宽度。这些功能似乎确实适用于它，但作为一个画布新手，我想我会把它放在那里，看看是否有一个“正确”或更有效的方法来做到这一点。在你的小提琴中，它反应灵敏，但它延伸了里面的内容！！这方面有什么改进吗？是的，这是为了扩展内容。如果不想拉伸，请删除标有setAttr且包含“scaleX”和“scaleY”的行

var maxStageWidth = 800;
var maxStageHeight = 500;
var maxPageWidth = 1000;

// Check to see if window is less than desired width and calls sizing functions
function setStageWidth() {
    if (window.innerWidth < maxPageWidth) {

        resizeStage();

    } else {

        maxStageSize();

    };
};

// Sets scale and dimensions of stage in relation to window size
function resizeStage() {

    var scalePercentage = window.innerWidth / maxPageWidth;

    stage.setAttr('scaleX', scalePercentage);
    stage.setAttr('scaleY', scalePercentage);
    stage.setAttr('width', maxStageWidth * scalePercentage);
    stage.setAttr('height', maxStageHeight * scalePercentage);
    stage.draw();
};

//Sets scale and dimensions of stage to max settings
function maxStageSize() {
    stage.setAttr('scaleX', 1);
    stage.setAttr('scaleY', 1);
    stage.setAttr('width', maxStageWidth);
    stage.setAttr('height', maxStageHeight);
    stage.draw();
};

var stage = new Kinetic.Stage({
    container: 'container',
    width: maxStageWidth,
    height: maxStageHeight,
    scaleX: 1
});

var circles = new Kinetic.Layer();

var circleRed = new Kinetic.Circle({
    x: stage.getWidth() / 2,
    y: stage.getHeight() / 2,
    radius: 100,
    stroke: 'black',
    strokeWidth: 2,
    fill: 'red'
});

var circleBlue = new Kinetic.Circle({
    x: stage.getWidth() / 2 + 120,
    y: stage.getHeight() / 2 + 175,
    radius: 50,
    stroke: 'black',
    strokeWidth: 2,
    fill: 'blue'
});

var circleOrange = new Kinetic.Circle({
    x: stage.getWidth() / 2 - 175,
    y: stage.getHeight() / 2 + 100,
    radius: 75,
    stroke: 'black',
    strokeWidth: 2,
    fill: 'orange'
});

circles.add(circleRed);
circles.add(circleBlue);
circles.add(circleOrange);

stage.add(circles);

// On load we set stage size based on window size
setStageWidth();

// On window resize we resize the stage size
window.addEventListener('resize', setStageWidth);

// Sets scale and dimensions of stage in relation to window size
function resizeStage() {

   var horizScalePercentage = window.innerWidth / maxPageWidth; 
   var vertiScalePercentage = window.innerHeight/ maxPageHeight; 

   stage.setAttr('scaleX', horizScalePercentage );
   stage.setAttr('scaleY', vertiScalePercentage );
   stage.setAttr('width', maxStageWidth * horizScalePercentage );
   stage.setAttr('height', maxStageHeight * vertiScalePercentage );
   stage.draw();
};

//Sets scale and dimensions of stage to max settings
function maxStageSize() {
    stage.setAttr('scaleX', 1);
    stage.setAttr('scaleY', 1);
    stage.setAttr('width', maxStageWidth);
    stage.setAttr('height', maxStageHeight);
    stage.draw();
};