使用electron制作满屏心特效

摘要：图片被压缩了看起来很难看主进程代码渲染进程代码界面代码代码创建画布创建图片对象初始化画布大小爱你一辈子感谢你喜欢你初始化生成范围偏移量缩放比例最小文字位置设置文字属性填充字符串重新初始化位置重新初始化位置放大

图片被压缩了 看起来很难看

import {BrowserWindow, app, ipcMain} from "electron"

createWindow();

ipcMain.on("quitApp", () => {
    app.quit();
});

function createWindow() {

    const loginURL = process.env.NODE_ENV === "development" ? `http://localhost:9080` : `file://${__dirname}/index.html`;
    const win = new BrowserWindow({

        alwaysOnTop: true,
        modal: true,
        width: 1200,
        height: 6500,
        frame: false,
        show: false,
        darkTheme: true,
        resizable: false,
        minimizable: false,
        maximizable: false,
        transparent: true,
        type: "toolbar",
        webPreferences: {
            devTools: false,
        }
    });
    win.loadURL(loginURL);
    win.once("ready-to-show", () => {
        win.show();
    });
}

 mounted() {
            var hearts = [];
            var canvas = this.$refs.drawHeart;
            var wW = 1920;
            var wH = 1040;
            // 创建画布
            var ctx = canvas.getContext("2d");
            // 创建图片对象
            var heartImage = new Image();
            heartImage.src = img;
            var num = 100;

            init();

            window.addEventListener("resize", function(){
                wW = window.innerWidth;
                wH = window.innerHeight;
            });
            // 初始化画布大小
            function init(){
                canvas.width = wW;
                canvas.height = wH;
                for(var i = 0; i < num; i++){
                    hearts.push(new Heart(i%5));
                }
                requestAnimationFrame(render);
            }

            function getColor(){
                var val = Math.random() * 10;
                if(val > 0 && val <= 1){
                    return "#00f";
                } else if(val > 1 && val <= 2){
                    return "#f00";
                } else if(val > 2 && val <= 3){
                    return "#0f0";
                } else if(val > 3 && val <= 4){
                    return "#368";
                } else if(val > 4 && val <= 5){
                    return "#666";
                } else if(val > 5 && val <= 6){
                    return "#333";
                } else if(val > 6 && val <= 7){
                    return "#f50";
                } else if(val > 7 && val <= 8){
                    return "#e96d5b";
                } else if(val > 8 && val <= 9){
                    return "#5be9e9";
                } else {
                    return "#d41d50";
                }
            }

            function getText(){
                var val = Math.random() * 10;
                if(val > 1 && val <= 3){
                    return "爱你一辈子";
                } else if(val > 3 && val <= 5){
                    return "感谢你";
                } else if(val > 5 && val <= 8){
                    return "喜欢你";
                } else{
                    return "I Love You";
                }
            }

            function Heart(type){
                this.type = type;
                // 初始化生成范围
                this.x = Math.random() * wW;
                this.y = Math.random() * wH;

                this.opacity = Math.random() * .5 + .5;

                // 偏移量
                this.vel = {
                    x: (Math.random() - .5) * 5,
                    y: (Math.random() - .5) * 5
                }

                this.initialW = wW * .5;
                this.initialH = wH * .5;
                // 缩放比例
                this.targetScale = Math.random() * .15 + .02; // 最小0.02
                this.scale = Math.random() * this.targetScale;

                // 文字位置
                this.fx = Math.random() * wW;
                this.fy = Math.random() * wH;
                this.fs = Math.random() * 10;
                this.text = getText();

                this.fvel = {
                    x: (Math.random() - .5) * 5,
                    y: (Math.random() - .5) * 5,
                    f: (Math.random() - .5) * 2
                }
            }

            Heart.prototype.draw = function(){
                ctx.save();
                ctx.globalAlpha = this.opacity;
                ctx.drawImage(heartImage, this.x, this.y, this.width, this.height);
                ctx.scale(this.scale + 1, this.scale + 1);
                if(!this.type){
                    // 设置文字属性
                    ctx.fillStyle = getColor();
                    ctx.font = "italic " + this.fs + "px sans-serif";
                    // 填充字符串
                    ctx.fillText(this.text, this.fx, this.fy);
                }
                ctx.restore();
            }
            Heart.prototype.update = function(){
                this.x += this.vel.x;
                this.y += this.vel.y;

                if(this.x - this.width > wW || this.x + this.width < 0){
                    // 重新初始化位置
                    this.scale = 0;
                    this.x = Math.random() * wW;
                    this.y = Math.random() * wH;
                }
                if(this.y - this.height > wH || this.y + this.height < 0){
                    // 重新初始化位置
                    this.scale = 0;
                    this.x = Math.random() * wW;
                    this.y = Math.random() * wH;
                }

                // 放大
                this.scale += (this.targetScale - this.scale) * .1;
                this.height = this.scale * this.initialH;
                this.width = this.height * 1.4;

                // -----文字-----
                this.fx += this.fvel.x;
                this.fy += this.fvel.y;
                this.fs += this.fvel.f;

                if(this.fs > 50){
                    this.fs = 2;
                }

                if(this.fx - this.fs > wW || this.fx + this.fs < 0){
                    // 重新初始化位置
                    this.fx = Math.random() * wW;
                    this.fy = Math.random() * wH;
                }
                if(this.fy - this.fs > wH || this.fy + this.fs < 0){
                    // 重新初始化位置
                    this.fx = Math.random() * wW;
                    this.fy = Math.random() * wH;
                }
            }

            function render(){
                ctx.clearRect(0, 0, wW, wH);
                for(var i = 0; i < hearts.length; i++){
                    hearts[i].draw();
                    hearts[i].update();
                }
                requestAnimationFrame(render);
            }

        }

const size = screen.getPrimaryDisplay().workAreaSize;   //获取显示器的宽高
win.setSet(size.width size.height);
win.setPosition(0,0);

这样就会让窗口全屏 但是有一个问题 就是这样做界面不会正确响应 我们可以使用进程通信去解决

win.webContents.sen("windowSize",size);

之后再主进程中监听就行了

以上代码会有一个问题 就是一旦运行 就不能关闭了

win.setIgnoreMouseEvents(true) 就可以让界面只做展示使用 鼠标可以点击你窗口的任意区域