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D3.js zoom.translateExtent() Function

  • Last Updated : 07 Sep, 2020
Geek Week

The zoom.translateExtent() Function in D3.js is used to set the translate extent to the specified array of points [[top-left corner, bottom-right corner]] and returns this zoom behaviour.

Syntax:

zoom.translateExtent([extent])

Parameters: This function accepts a single parameter as mentioned above and described below

  • extent: This parameter is used to set the wheel delta function to the specified function.

Return Value: This function returns the zoom behaviour.

Below programs illustrate the zoom.translateExtent() function in D3.js



Example 1:




<!DOCTYPE html> 
<html
<head
    <meta charset="utf-8">
        
    <script src=
            "https://d3js.org/d3.v4.min.js"
    </script>
       
    <script src=
    </script>
</head
      
<body
    <center>
        <h1 style="color: green;"
            Geeksforgeeks 
        </h1
        
        <h3>
  D3.js | zoom.translateExtent() Function
      </h3>
          
        <div id="GFG"></div>
          
        <script>
            var height = 300;
            var width = 300;
              
            var zoom = d3.zoom()
               .translateExtent([[0, 0], [300, 300]])
                .on("zoom", zoomed);
              
            var svg = d3.select("#GFG")
                    .append("svg")
                    .attr("width", height)
                    .attr("height", width)
                    .append("g")
                      
            svg.append("rect")
                    .attr("x", 0)
                    .attr("y", 0)
                    .attr("height", 200)
                    .attr("width", 400)
                    .style("fill", "green");
                         
                var circle = svg.append("circle")
                    .attr("cx", 100)
                    .attr("cy", 100)
                    .attr("r", 20)
                    .style("fill", "red")
                      
                svg.call(zoom);
                  
                function zoomed() {
                  circle.attr(
                    "transform", d3.event.transform);
                }
        </script
    </center>
</body
    
</html>

Output:

Example 2:




<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
  
        <script src=
            "https://d3js.org/d3.v4.min.js">
      </script>
  
        <script src=
      </script>
  
        <style>
            #svg {
                background-color: rgb(149, 160, 230);
            }
            #shape {
                fill: rgb(232, 7, 228);
                stroke: white;
                stroke-width: 3px;
            }
            #shape:hover {
                fill: rgb(13, 214, 30);
            }
        </style>
    </head>
  
    <body>
        <center>
            <h1 style="color: green;">
                Geeksforgeeks
            </h1>
  
            <h3>D3.js | zoom.translateExtent() Function</h3>
  
            <div id="GFG"></div>
  
            <script>
                var width = 300,
                    height = 200;
  
                var container =
                    d3.select("#GFG").append("div");
  
                var svg = 
                    container.append(
                      "svg").attr(
                      "id", "svg").attr(
                      "width", width).attr(
                      "height", height);
  
                var group = svg.append("g");
  
                var shape = group.append(
                  "rect").attr(
                  "id", "shape").attr(
                  "width", 150).attr(
                  "height", 100).attr(
                  "x", 75).attr("y", 50);
  
                zoom = d3
                    .zoom()
                    .scaleExtent([1, 3])
                    .translateExtent([
                        [0, 0],
                        [width, height],
                    ])
                    .on("zoom", zoomed);
  
                svg.call(zoom);
  
                function zoomed() {
                    change = d3.event.transform;
                    console.log(change);
                    group.attr("transform", "translate(" +
                    [change.x, change.y] + ")scale(" + 
                    change.k + ")");
                    group.select("#shape").style(
                        "stroke-width", 3 / change.k + "px");
                }
            </script>
        </center>
    </body>
</html>

Output:

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