如何重置放大d3.js?

时间:2018-02-14 15:00:09

标签: javascript d3.js svg

我有一个简单的svg矩形,我使用d3.js添加了缩放和平移。我还添加了一个按钮,以便在单击按钮后尝试重置缩放。这是代码:

<button>Reset</button>
<body>
  <script>

      function zoomed() {
              svg.attr("transform", d3.event.transform)
      }

    var svg = d3.select("body")
      .append("svg")
      .attr("width", "100%")
      .attr("height", "100%")
      .call(d3.zoom().on("zoom", zoomed))
      .append("g")

    svg.append("rect")
        .attr("x", 450)
        .attr("y", 200)
        .attr("width", 300)
        .attr("height", 200)
        .style("fill", "#B8DEE6")

    $("#Reset").click(() => {
    zoom.transform(container, d3.zoomIdentity.scale(1));
})

  </script>
</body>

我尝试过zoom.transform(container,d3.zoomIdentity.scale(1)),但它似乎不起作用。有人可以告诉重置功能有什么问题吗?

1 个答案:

答案 0 :(得分:3)

您需要以这种方式重写代码:

function zoomed() {
  gElem.attr("transform", d3.event.transform)
}

var zoom = d3.zoom().on("zoom", zoomed);

var svg = d3.select("body")
  .append("svg")
  .attr("width", "600")
  .attr("height", "600")


var gElem = svg.append("g").call(zoom);

gElem.append("rect")
  .attr("x", 50)
  .attr("y", 50)
  .attr("width", 300)
  .attr("height", 200)
  .style("fill", "#B8DEE6")

$("#Reset").click(() => {
  gElem.transition()
    .duration(750)
    .call(zoom.transform, d3.zoomIdentity);
});

检查演示:

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function zoomed() {
  gElem.attr("transform", d3.event.transform)
}

var zoom = d3.zoom().on("zoom", zoomed);

var svg = d3.select("body")
  .append("svg")
  .attr("width", "400")
  .attr("height", "200")
  

var gElem = svg.append("g").call(zoom);

gElem.append("rect")
  .attr("x", 50)
  .attr("y", 50)
  .attr("width", 300)
  .attr("height", 200)
  .style("fill", "#B8DEE6")

$("#Reset").click(() => {
  gElem.transition()
    .duration(750)
    .call(zoom.transform, d3.zoomIdentity);
});
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<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.13.0/d3.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="Reset">RESET</button>
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