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       
(Showing Draft Content)

进行拖拽(Drag&Drop)的简单示例

问题:如何将按钮拖拽到SpreadJS中?

背景:

拖拽操作(Drag&Drop)是网页应用中常见的一种快捷操作,那么如何在SpreadJS中进行此类操作,本文就以一个简单的示例来说明。

此示例演示将页面中的元素(button)通过拖拽的方式,将按钮的文字粘贴到 SpreadJS 单元格中。同时可以查看控制台(console)了解事件过程。

image

核心代码:

通过SpreadJS 提供的 hitTest方法,很容易找到与之交互的SpreadJS 内部对象,接下来就是通过API将button中的Text设置为单元格的 Value.

/* 松开鼠标,触发 drop */

        document.addEventListener("drop", function (event) {

            // 阻止默认行为(drop的默认处理方式是当初链接处理)

            event.preventDefault();

            // 把拖拽元素移入目标区域

            //这里要经过两步处理

            // 1、先把拖拽元素从原父元素中删除(这步不是必须的)

            ///2、然后再添加到目标区域

            if (event.target.className == "dropzone") {

                event.target.style.background = "";

                dragged.parentNode.removeChild(dragged);

                event.target.appendChild(dragged);

            }

            //获取拖动物理在屏幕的位置

            var offsetL = document.getElementById("ss").offsetLeft;

            var offsetT = document.getElementById("ss").offsetTop;

            //获取拖动块的值

            var tab_value = document.getElementById("item1").innerText

            console.log(tab_value)

            var x = event.pageX - offsetL;

            var y = event.pageY - offsetT;

            //获取单元格的位置

            var target = spread.hitTest(x, y);

            console.log(target)

            console.log("列: " + target.worksheetHitInfo.col + "行: " + target.worksheetHitInfo.row);

            var sheet = spread.getActiveSheet();

            sheet.setValue(target.worksheetHitInfo.row, target.worksheetHitInfo.col, tab_value);

            console.log("执行完毕 ")

        })

作者: Grapecity.China | 审核:Ellia.Duan | 更新时间:2023.12.13