0

次の作業コードを取得しましたhttp://jsfiddle.net/hg8YZ/ (フルスクリーンhttp://jsfiddle.net/hg8YZ/embedded/result/ )

私の唯一の問題は、さまざまな画面形式でマウスの位置に拡大鏡が表示されないことです。

私のJqueryコード：

    var mainImage = $("#mainImage");
$(".img-container img").hover(function(){
   var src = $(this).attr("src");
    $("#mainImage").attr("src",src);
});

mainImage.on("click",function(){
    $(this).css("transform","scale(2)");
});
$(function() {

  var native_width = 0;
  var native_height = 0;
  var mouse = {x: 0, y: 0};
  var magnify;
  var cur_img;

  var ui = {
    magniflier: $('.magniflier')
  };

  // Add the magnifying glass
  if (ui.magniflier.length) {
    var div = document.createElement('div');
    div.setAttribute('class', 'glass');
    ui.glass = $(div);

    ui.magniflier.parent().append(div);
  }


  // All the magnifying will happen on "mousemove"

  var mouseMove = function(e) {
    var $el = $(this);

    // Container offset relative to document
    var magnify_offset = cur_img.offset();

    // Mouse position relative to container
    // pageX/pageY - container's offsetLeft/offetTop
    mouse.x = e.pageX - magnify_offset.left;
    mouse.y = e.pageY - magnify_offset.top;

    // The Magnifying glass should only show up when the mouse is inside
    // It is important to note that attaching mouseout and then hiding
    // the glass wont work cuz mouse will never be out due to the glass
    // being inside the parent and having a higher z-index (positioned above)
    if (
      mouse.x < cur_img.width() &&
      mouse.y < cur_img.height() &&
      mouse.x > 0 &&
      mouse.y > 0
      ) {

      magnify(e);
    }
    else {
      ui.glass.fadeOut(100);
    }

    return;
  };

  var magnify = function(e) {

    // The background position of div.glass will be
    // changed according to the position
    // of the mouse over the img.magniflier
    //
    // So we will get the ratio of the pixel
    // under the mouse with respect
    // to the image and use that to position the
    // large image inside the magnifying glass

    var rx = Math.round(mouse.x/cur_img.width()*native_width - ui.glass.width()/2)*-1;
    var ry = Math.round(mouse.y/cur_img.height()*native_height - ui.glass.height()/2)*-1;
    var bg_pos = rx + "px " + ry + "px";

    // Calculate pos for magnifying glass
    //
    // Easy Logic: Deduct half of width/height
    // from mouse pos.

    // var glass_left = mouse.x - ui.glass.width() / 2;
    // var glass_top  = mouse.y - ui.glass.height() / 2;
    var glass_left = e.pageX - ui.glass.width() / 2;
    var glass_top  = e.pageY - ui.glass.height() / 2;
    //console.log(glass_left, glass_top, bg_pos)
    // Now, if you hover on the image, you should
    // see the magnifying glass in action
    ui.glass.css({
      left: glass_left,
      top: glass_top,
      backgroundPosition: bg_pos
    });

    return;
  };

  $('.magniflier').on('mousemove', function() {
    ui.glass.fadeIn(100);

    cur_img = $(this);

    var large_img_loaded = cur_img.data('large-img-loaded');
    var src = cur_img.data('large') || cur_img.attr('src');

    // Set large-img-loaded to true
    // cur_img.data('large-img-loaded', true)

    if (src) {
      ui.glass.css({
        'background-image': 'url(' + src + ')',
        'background-repeat': 'no-repeat'
      });
    }

    // When the user hovers on the image, the script will first calculate
    // the native dimensions if they don't exist. Only after the native dimensions
    // are available, the script will show the zoomed version.
    //if(!native_width && !native_height) {

      if (!cur_img.data('native_width')) {
        // This will create a new image object with the same image as that in .small
        // We cannot directly get the dimensions from .small because of the 
        // width specified to 200px in the html. To get the actual dimensions we have
        // created this image object.
        var image_object = new Image();

        image_object.onload = function() {
          // This code is wrapped in the .load function which is important.
          // width and height of the object would return 0 if accessed before 
          // the image gets loaded.
          native_width = image_object.width;
          native_height = image_object.height;

          cur_img.data('native_width', native_width);
          cur_img.data('native_height', native_height);

          //console.log(native_width, native_height);

          mouseMove.apply(this, arguments);

          ui.glass.on('mousemove', mouseMove);
        };


        image_object.src = src;

        return;
      } else {

        native_width = cur_img.data('native_width');
        native_height = cur_img.data('native_height');
      }
    //}
    //console.log(native_width, native_height);

    mouseMove.apply(this, arguments);

    ui.glass.on('mouseout', mouseMove);
  });

  ui.glass.on('mouseout', function() {
    ui.glass.off('mouseout', mouseMove);
  });

});

誰かが私の問題を見つけることができますか?

4

1 に答える 1

1

前のコメントは正しいです。ズームするとき、ズーム スケールを変更すると、座標を取得する方法が失われます。e.pageX(y) を使用する代わりに、e.clientX または e.screenX を使用して、ブラウザーのサイズが異なる場合に正しい位置と比率を維持する必要があると思います。それが変わる理由の良い例は、ここにあります http://www.jacklmoore.com/notes/mouse-position/

うまくいけば、これが役に立ちます。クライアントのクリック/マウスの位置に基づいて動的コンテンツを配置しようとすると、同様の問題が発生しました。

于 2013-10-02T22:58:37.893 に答える