問題描述

是否可以使用 Raphael js 在頁面周圍拖放除圓形和矩形以外的對象?

Is it possible to be able to drag and drop objects other than just circles and rectangles around a page using Raphael js?

我想添加路徑和圖像，然后您可以四處移動，但事實證明這很棘手.我想和 Raphael 一起解決這個問題，因為它支持觸摸界面.

I want to add in paths and images which you can then move around but its proving tricky. I would like to work this out with Raphael because of its support with touch interfaces.

這里是代碼

<script>
    window.onload = function () {
        var R = Raphael(0, 0, "100%", "100%"),
            r = R.circle(100, 100, 50).attr({fill: "hsb(0, 1, 1)", stroke: "none", opacity: .5}),
            g = R.circle(210, 100, 50).attr({fill: "hsb(.3, 1, 1)", stroke: "none", opacity: .5}),
            b = R.circle(320, 100, 50).attr({fill: "hsb(.6, 1, 1)", stroke: "#fff", "fill-opacity": 0, "stroke-width": 0.8, opacity: .5}),
            p = R.path("M 250 250 l 0 -50 l -50 0 l 0 -50 l -50 0 l 0 50 l -50 0 l 0 50 z") .attr({fill: "hsb(.8, 1, 1)", stroke: "none", opacity: .5});
        var start = function () {
            this.ox = this.attr("cx");
            this.oy = this.attr("cy");
            this.animate({r: 70, opacity: .25}, 500, ">");
        },
        move = function (dx, dy) {
            this.attr({cx: this.ox + dx, cy: this.oy + dy});
        },
        up = function () {
            this.animate({r: 50, opacity: .5}, 500, ">");
        };
        R.set(r, g, b, p).drag(move, start, up);
    };
</script>

推薦答案

這里的關鍵(我發(fā)現(xiàn))是將 x 和 y 增量轉換為路徑對象可以理解的翻譯值.

The key here (that I found) is to convert the x and y deltas into translate values, which the path object understands.

http://www.nathancolgate.com/post/2946823151/drag-and-drop-paths-in-raphael-js

實際上是相同的方法:

var paper = Raphael(10, 50, 320, 200);

var tri = paper.path("M0 0L0 20L25 10L0 0Z").attr("fill", "#ff0");
var rex = paper.rect(10, 20, 50, 50).attr("fill", "#ff0");

var start = function () {
  this.odx = 0;
  this.ody = 0;
  this.animate({"fill-opacity": 0.2}, 500);
},
move = function (dx, dy) {
  this.translate(dx - this.odx, dy - this.ody);
  this.odx = dx;
  this.ody = dy;
},
up = function () {
    this.animate({"fill-opacity": 1}, 500);
};

tri.drag(move, start, up);
rex.drag(move, start, up);

這篇關于在 Raphael js 中使路徑和圖像可拖動的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！