div元素拖动到特定位置时如何触发模态？

Posted 2023-03-25

【中文标题】div元素拖动到特定位置时如何触发模态？

【英文标题】：How to trigger modal when div element is dragged to specific location?

【发布时间】：2019-10-16 03:55:54

【问题描述】：

我正在为一个学校项目制作一个棋盘游戏网站。我有一个可以拖动的 div 元素（图像）。目标是到达终点线。所以我的主要问题是当图像被拖到终点时如何触发模态？下面是我编写的用于在画布上拖动元素的代码。

    var canvas = new fabric.Canvas('c',  selection: false );
    var grid = 35;

    // create grid

    for (var i = 0; i < (3000 / grid); i++) 
        canvas.add(new fabric.Line([ i * grid, 0, i * grid, 3000],  stroke: '#ccc', selectable: false ));
        canvas.add(new fabric.Line([ 0, i * grid, 3000, i * grid],  stroke: '#ccc', selectable: false ))
    

    const url = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_geel.png';
    const url1 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_blauw.png';
    const url2 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_lichtblauw.png';
    const url3 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_lichtgroen.png';
    const url4 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_paars.png';
    const url5 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_rood.png';
    const url6 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_roze.png';

    fabric.Image.fromURL(url, (img) => 
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    , 
//here you can set the positioning
        left: 1790,
        top: 40,
    );
    fabric.Image.fromURL(url1, (img) => 
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    , 
//here you can set the positioning
        left: 1790,
        top: 100,
    );
    fabric.Image.fromURL(url2, (img) => 
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    , 
//here you can set the positioning
        left: 1790,
        top: 150,
    );
    fabric.Image.fromURL(url3, (img) => 
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    , 
//here you can set the positioning
        left: 1790,
        top: 200,
    );
    fabric.Image.fromURL(url4, (img) => 
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    , 
//here you can set the positioning
        left: 1790,
        top: 250,
    );
    fabric.Image.fromURL(url5, (img) => 
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    , 
//here you can set the positioning
        left: 1790,
        top: 300,
    );
    fabric.Image.fromURL(url6, (img) => 
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    , 
//here you can set the positioning
        left: 1790,
        top: 350,
    );
    canvas.on('object:moving', function(options) 
        options.target.set(
            left: Math.round(options.target.left / grid) * grid,
            top: Math.round(options.target.top / grid) * grid
        );
    );


)

【参考方案1】：

使用碰撞检测启动here，并编写一个在检测发生后启动模态的函数。

【讨论】：

感谢您的信息，但我不知道如何在我的 oww 代码中实现这一点。你能把喵喵指向正确的方向吗？