Dragging a Konva layer from empty areas










0















I'd like to drag a Konva layer even if empty. I see that I can drag the layer only where objects are present (the code shows that you can drag where the rectangle is but nowhere else).



How can I drag the layer dragging empty parts?



Moreover, I see that also the mouseenter and mousleave aren't respected if you are out of the objects of the layer.






<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
</head>
<body>
<script src="js/modulePattern.js"></script>
<script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



<div id="container"></div>
<script>

function demo()

var stage = new Konva.Stage(
container: 'container',
width: 100,
height: 100
);

var layer = new Konva.Layer(draggable: true);
stage.add(layer);

layer.on("dragmove", function()
console.log(this.x(), this.y())
);

layer.on("mouseenter", function()
stage.container().style.cursor = 'pointer';
);

layer.on("mouseleave", function()
stage.container().style.cursor = 'default';
);

var rect = new Konva.Rect(
width: 50,
height: 50,
fill: 'red',
stroke: 'black',
strokeWidth: 5
);

layer.add(rect);

stage.draw();


demo();
</script>

</body>
</html>












share|improve this question




























    0















    I'd like to drag a Konva layer even if empty. I see that I can drag the layer only where objects are present (the code shows that you can drag where the rectangle is but nowhere else).



    How can I drag the layer dragging empty parts?



    Moreover, I see that also the mouseenter and mousleave aren't respected if you are out of the objects of the layer.






    <!DOCTYPE html>
    <html>
    <head lang="en">
    <meta charset="UTF-8">
    </head>
    <body>
    <script src="js/modulePattern.js"></script>
    <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



    <div id="container"></div>
    <script>

    function demo()

    var stage = new Konva.Stage(
    container: 'container',
    width: 100,
    height: 100
    );

    var layer = new Konva.Layer(draggable: true);
    stage.add(layer);

    layer.on("dragmove", function()
    console.log(this.x(), this.y())
    );

    layer.on("mouseenter", function()
    stage.container().style.cursor = 'pointer';
    );

    layer.on("mouseleave", function()
    stage.container().style.cursor = 'default';
    );

    var rect = new Konva.Rect(
    width: 50,
    height: 50,
    fill: 'red',
    stroke: 'black',
    strokeWidth: 5
    );

    layer.add(rect);

    stage.draw();


    demo();
    </script>

    </body>
    </html>












    share|improve this question


























      0












      0








      0








      I'd like to drag a Konva layer even if empty. I see that I can drag the layer only where objects are present (the code shows that you can drag where the rectangle is but nowhere else).



      How can I drag the layer dragging empty parts?



      Moreover, I see that also the mouseenter and mousleave aren't respected if you are out of the objects of the layer.






      <!DOCTYPE html>
      <html>
      <head lang="en">
      <meta charset="UTF-8">
      </head>
      <body>
      <script src="js/modulePattern.js"></script>
      <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



      <div id="container"></div>
      <script>

      function demo()

      var stage = new Konva.Stage(
      container: 'container',
      width: 100,
      height: 100
      );

      var layer = new Konva.Layer(draggable: true);
      stage.add(layer);

      layer.on("dragmove", function()
      console.log(this.x(), this.y())
      );

      layer.on("mouseenter", function()
      stage.container().style.cursor = 'pointer';
      );

      layer.on("mouseleave", function()
      stage.container().style.cursor = 'default';
      );

      var rect = new Konva.Rect(
      width: 50,
      height: 50,
      fill: 'red',
      stroke: 'black',
      strokeWidth: 5
      );

      layer.add(rect);

      stage.draw();


      demo();
      </script>

      </body>
      </html>












      share|improve this question
















      I'd like to drag a Konva layer even if empty. I see that I can drag the layer only where objects are present (the code shows that you can drag where the rectangle is but nowhere else).



      How can I drag the layer dragging empty parts?



      Moreover, I see that also the mouseenter and mousleave aren't respected if you are out of the objects of the layer.






      <!DOCTYPE html>
      <html>
      <head lang="en">
      <meta charset="UTF-8">
      </head>
      <body>
      <script src="js/modulePattern.js"></script>
      <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



      <div id="container"></div>
      <script>

      function demo()

      var stage = new Konva.Stage(
      container: 'container',
      width: 100,
      height: 100
      );

      var layer = new Konva.Layer(draggable: true);
      stage.add(layer);

      layer.on("dragmove", function()
      console.log(this.x(), this.y())
      );

      layer.on("mouseenter", function()
      stage.container().style.cursor = 'pointer';
      );

      layer.on("mouseleave", function()
      stage.container().style.cursor = 'default';
      );

      var rect = new Konva.Rect(
      width: 50,
      height: 50,
      fill: 'red',
      stroke: 'black',
      strokeWidth: 5
      );

      layer.add(rect);

      stage.draw();


      demo();
      </script>

      </body>
      </html>








      <!DOCTYPE html>
      <html>
      <head lang="en">
      <meta charset="UTF-8">
      </head>
      <body>
      <script src="js/modulePattern.js"></script>
      <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



      <div id="container"></div>
      <script>

      function demo()

      var stage = new Konva.Stage(
      container: 'container',
      width: 100,
      height: 100
      );

      var layer = new Konva.Layer(draggable: true);
      stage.add(layer);

      layer.on("dragmove", function()
      console.log(this.x(), this.y())
      );

      layer.on("mouseenter", function()
      stage.container().style.cursor = 'pointer';
      );

      layer.on("mouseleave", function()
      stage.container().style.cursor = 'default';
      );

      var rect = new Konva.Rect(
      width: 50,
      height: 50,
      fill: 'red',
      stroke: 'black',
      strokeWidth: 5
      );

      layer.add(rect);

      stage.draw();


      demo();
      </script>

      </body>
      </html>





      <!DOCTYPE html>
      <html>
      <head lang="en">
      <meta charset="UTF-8">
      </head>
      <body>
      <script src="js/modulePattern.js"></script>
      <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



      <div id="container"></div>
      <script>

      function demo()

      var stage = new Konva.Stage(
      container: 'container',
      width: 100,
      height: 100
      );

      var layer = new Konva.Layer(draggable: true);
      stage.add(layer);

      layer.on("dragmove", function()
      console.log(this.x(), this.y())
      );

      layer.on("mouseenter", function()
      stage.container().style.cursor = 'pointer';
      );

      layer.on("mouseleave", function()
      stage.container().style.cursor = 'default';
      );

      var rect = new Konva.Rect(
      width: 50,
      height: 50,
      fill: 'red',
      stroke: 'black',
      strokeWidth: 5
      );

      layer.add(rect);

      stage.draw();


      demo();
      </script>

      </body>
      </html>






      javascript konvajs






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      edited Nov 12 '18 at 23:31







      cdarwin

















      asked Nov 12 '18 at 22:14









      cdarwincdarwin

      1,48772952




      1,48772952






















          1 Answer
          1






          active

          oldest

          votes


















          1














          Konva does not detect events on empty space of layers. And it is unclear how can it do it if you have several layers on the stage.



          If you still need to listen on empty layers and make a layer draggable at any space you can:



          1. Make stage draggable instead and listen events on it (click will work on empty space too).


          2. Add a transparent rectangle as a background, so it will be used to listen to events:





          <!DOCTYPE html>
          <html>
          <head lang="en">
          <meta charset="UTF-8">
          </head>
          <body>
          <script src="js/modulePattern.js"></script>
          <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



          <div id="container"></div>
          <script>

          function demo()

          var stage = new Konva.Stage(
          container: 'container',
          width: 300,
          height: 300
          );

          var layer = new Konva.Layer(draggable: true);
          stage.add(layer);


          layer.on("mouseenter", function()
          stage.container().style.cursor = 'pointer';
          );

          layer.on("mouseleave", function()
          stage.container().style.cursor = 'default';
          );

          var rect = new Konva.Rect(
          width: 50,
          height: 50,
          fill: 'red',
          stroke: 'black',
          strokeWidth: 5
          );

          var back = new Konva.Rect(
          fill: 'red',
          width: stage.width(),
          height: stage.height()
          )
          layer.add(back);

          // move rectangle so it always stay on the screen, no matter where layer it
          layer.on('dragend', function()
          back.setAbsolutePosition(x: 0, y: 0);
          layer.draw();
          );



          layer.add(rect);

          stage.draw();


          demo();
          </script>

          </body>
          </html>








          share|improve this answer






















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            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            1














            Konva does not detect events on empty space of layers. And it is unclear how can it do it if you have several layers on the stage.



            If you still need to listen on empty layers and make a layer draggable at any space you can:



            1. Make stage draggable instead and listen events on it (click will work on empty space too).


            2. Add a transparent rectangle as a background, so it will be used to listen to events:





            <!DOCTYPE html>
            <html>
            <head lang="en">
            <meta charset="UTF-8">
            </head>
            <body>
            <script src="js/modulePattern.js"></script>
            <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



            <div id="container"></div>
            <script>

            function demo()

            var stage = new Konva.Stage(
            container: 'container',
            width: 300,
            height: 300
            );

            var layer = new Konva.Layer(draggable: true);
            stage.add(layer);


            layer.on("mouseenter", function()
            stage.container().style.cursor = 'pointer';
            );

            layer.on("mouseleave", function()
            stage.container().style.cursor = 'default';
            );

            var rect = new Konva.Rect(
            width: 50,
            height: 50,
            fill: 'red',
            stroke: 'black',
            strokeWidth: 5
            );

            var back = new Konva.Rect(
            fill: 'red',
            width: stage.width(),
            height: stage.height()
            )
            layer.add(back);

            // move rectangle so it always stay on the screen, no matter where layer it
            layer.on('dragend', function()
            back.setAbsolutePosition(x: 0, y: 0);
            layer.draw();
            );



            layer.add(rect);

            stage.draw();


            demo();
            </script>

            </body>
            </html>








            share|improve this answer



























              1














              Konva does not detect events on empty space of layers. And it is unclear how can it do it if you have several layers on the stage.



              If you still need to listen on empty layers and make a layer draggable at any space you can:



              1. Make stage draggable instead and listen events on it (click will work on empty space too).


              2. Add a transparent rectangle as a background, so it will be used to listen to events:





              <!DOCTYPE html>
              <html>
              <head lang="en">
              <meta charset="UTF-8">
              </head>
              <body>
              <script src="js/modulePattern.js"></script>
              <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



              <div id="container"></div>
              <script>

              function demo()

              var stage = new Konva.Stage(
              container: 'container',
              width: 300,
              height: 300
              );

              var layer = new Konva.Layer(draggable: true);
              stage.add(layer);


              layer.on("mouseenter", function()
              stage.container().style.cursor = 'pointer';
              );

              layer.on("mouseleave", function()
              stage.container().style.cursor = 'default';
              );

              var rect = new Konva.Rect(
              width: 50,
              height: 50,
              fill: 'red',
              stroke: 'black',
              strokeWidth: 5
              );

              var back = new Konva.Rect(
              fill: 'red',
              width: stage.width(),
              height: stage.height()
              )
              layer.add(back);

              // move rectangle so it always stay on the screen, no matter where layer it
              layer.on('dragend', function()
              back.setAbsolutePosition(x: 0, y: 0);
              layer.draw();
              );



              layer.add(rect);

              stage.draw();


              demo();
              </script>

              </body>
              </html>








              share|improve this answer

























                1












                1








                1







                Konva does not detect events on empty space of layers. And it is unclear how can it do it if you have several layers on the stage.



                If you still need to listen on empty layers and make a layer draggable at any space you can:



                1. Make stage draggable instead and listen events on it (click will work on empty space too).


                2. Add a transparent rectangle as a background, so it will be used to listen to events:





                <!DOCTYPE html>
                <html>
                <head lang="en">
                <meta charset="UTF-8">
                </head>
                <body>
                <script src="js/modulePattern.js"></script>
                <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



                <div id="container"></div>
                <script>

                function demo()

                var stage = new Konva.Stage(
                container: 'container',
                width: 300,
                height: 300
                );

                var layer = new Konva.Layer(draggable: true);
                stage.add(layer);


                layer.on("mouseenter", function()
                stage.container().style.cursor = 'pointer';
                );

                layer.on("mouseleave", function()
                stage.container().style.cursor = 'default';
                );

                var rect = new Konva.Rect(
                width: 50,
                height: 50,
                fill: 'red',
                stroke: 'black',
                strokeWidth: 5
                );

                var back = new Konva.Rect(
                fill: 'red',
                width: stage.width(),
                height: stage.height()
                )
                layer.add(back);

                // move rectangle so it always stay on the screen, no matter where layer it
                layer.on('dragend', function()
                back.setAbsolutePosition(x: 0, y: 0);
                layer.draw();
                );



                layer.add(rect);

                stage.draw();


                demo();
                </script>

                </body>
                </html>








                share|improve this answer













                Konva does not detect events on empty space of layers. And it is unclear how can it do it if you have several layers on the stage.



                If you still need to listen on empty layers and make a layer draggable at any space you can:



                1. Make stage draggable instead and listen events on it (click will work on empty space too).


                2. Add a transparent rectangle as a background, so it will be used to listen to events:





                <!DOCTYPE html>
                <html>
                <head lang="en">
                <meta charset="UTF-8">
                </head>
                <body>
                <script src="js/modulePattern.js"></script>
                <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



                <div id="container"></div>
                <script>

                function demo()

                var stage = new Konva.Stage(
                container: 'container',
                width: 300,
                height: 300
                );

                var layer = new Konva.Layer(draggable: true);
                stage.add(layer);


                layer.on("mouseenter", function()
                stage.container().style.cursor = 'pointer';
                );

                layer.on("mouseleave", function()
                stage.container().style.cursor = 'default';
                );

                var rect = new Konva.Rect(
                width: 50,
                height: 50,
                fill: 'red',
                stroke: 'black',
                strokeWidth: 5
                );

                var back = new Konva.Rect(
                fill: 'red',
                width: stage.width(),
                height: stage.height()
                )
                layer.add(back);

                // move rectangle so it always stay on the screen, no matter where layer it
                layer.on('dragend', function()
                back.setAbsolutePosition(x: 0, y: 0);
                layer.draw();
                );



                layer.add(rect);

                stage.draw();


                demo();
                </script>

                </body>
                </html>








                <!DOCTYPE html>
                <html>
                <head lang="en">
                <meta charset="UTF-8">
                </head>
                <body>
                <script src="js/modulePattern.js"></script>
                <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



                <div id="container"></div>
                <script>

                function demo()

                var stage = new Konva.Stage(
                container: 'container',
                width: 300,
                height: 300
                );

                var layer = new Konva.Layer(draggable: true);
                stage.add(layer);


                layer.on("mouseenter", function()
                stage.container().style.cursor = 'pointer';
                );

                layer.on("mouseleave", function()
                stage.container().style.cursor = 'default';
                );

                var rect = new Konva.Rect(
                width: 50,
                height: 50,
                fill: 'red',
                stroke: 'black',
                strokeWidth: 5
                );

                var back = new Konva.Rect(
                fill: 'red',
                width: stage.width(),
                height: stage.height()
                )
                layer.add(back);

                // move rectangle so it always stay on the screen, no matter where layer it
                layer.on('dragend', function()
                back.setAbsolutePosition(x: 0, y: 0);
                layer.draw();
                );



                layer.add(rect);

                stage.draw();


                demo();
                </script>

                </body>
                </html>





                <!DOCTYPE html>
                <html>
                <head lang="en">
                <meta charset="UTF-8">
                </head>
                <body>
                <script src="js/modulePattern.js"></script>
                <script src="https://unpkg.com/konva@2.4.2/konva.min.js"></script>



                <div id="container"></div>
                <script>

                function demo()

                var stage = new Konva.Stage(
                container: 'container',
                width: 300,
                height: 300
                );

                var layer = new Konva.Layer(draggable: true);
                stage.add(layer);


                layer.on("mouseenter", function()
                stage.container().style.cursor = 'pointer';
                );

                layer.on("mouseleave", function()
                stage.container().style.cursor = 'default';
                );

                var rect = new Konva.Rect(
                width: 50,
                height: 50,
                fill: 'red',
                stroke: 'black',
                strokeWidth: 5
                );

                var back = new Konva.Rect(
                fill: 'red',
                width: stage.width(),
                height: stage.height()
                )
                layer.add(back);

                // move rectangle so it always stay on the screen, no matter where layer it
                layer.on('dragend', function()
                back.setAbsolutePosition(x: 0, y: 0);
                layer.draw();
                );



                layer.add(rect);

                stage.draw();


                demo();
                </script>

                </body>
                </html>






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                share|improve this answer










                answered Nov 13 '18 at 13:17









                lavrtonlavrton

                7,32221231




                7,32221231



























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