允许用户使用css&amp ;;旋转图像jQuery的

时间:2013-05-27 06:24:05

标签: jquery css3 rotation transform drag

我想让用户像在photoshop中一样旋转图像,我创造了一个小提琴。 旋转度感到有些不适,长期以来一直在努力,需要一些帮助。

Js Fiddle链接 - http://jsfiddle.net/madhuri2987/fZegT/8/

全屏 - http://jsfiddle.net/madhuri2987/fZegT/8/embedded/result/

HTML

<div id="mainTarget">
    <img src="http://myreaxns.com/wp-content/uploads/2013/03/priyanka-chopra-image.jpg" width="300" class="mainTarget" />
    <div id="target">&nbsp;</div>
</div>

JS

$(window).load(function(){
var dragging = false

$(function() {
    var target = $('#target');
    var mainTarget = $('#mainTarget');
    target.mousedown(function() {
        dragging = true
    })
    $(document).mouseup(function() {
        dragging = false
    })
    $(document).mousemove(function(e) {
        if (dragging) {

            var mouse_x = e.pageX;
            var mouse_y = e.pageY;
            var radians = Math.atan2(mouse_x - 10, mouse_y - 10);
            var degree = (radians * (180 / Math.PI) * -1) + 90;
            mainTarget.css('-moz-transform', 'rotate(' + degree + 'deg)');
            mainTarget.css('-moz-transform-origin', '50% 50%');
            mainTarget.css('-webkit-transform', 'rotate(' + degree + 'deg)');
            mainTarget.css('-webkit-transform-origin', '50% 50%');
            mainTarget.css('-o-transform', 'rotate(' + degree + 'deg)');
            mainTarget.css('-o-transform-origin', '50% 50%');
            mainTarget.css('-ms-transform', 'rotate(' + degree + 'deg)');
            mainTarget.css('-ms-transform-origin', '50% 50%');
        }
    })
})
});

2 个答案:

答案 0 :(得分:0)

我找到了解决方案,修改后的脚本如下:

小提琴链接 - http://jsfiddle.net/madhuri2987/fZegT/9/

JS

$(window).load(function(){
var dragging = false

$(function() {
    var target = $('#target');
    var mainTarget = $('#mainTarget');
    var offset = mainTarget.offset();
    target.mousedown(function() {
        dragging = true
    })
    $(document).mouseup(function() {
        dragging = false
    })
    $(document).mousemove(function(e) {
        if (dragging) {

            var center_x = (offset.left) + (mainTarget.width()/2);
            var center_y = (offset.top) + (mainTarget.height()/2);
            var mouse_x = e.pageX; var mouse_y = e.pageY;
            var radians = Math.atan2(mouse_x - center_x, mouse_y - center_y);
            var degree = (radians * (180 / Math.PI) * -1) + 120;    
            mainTarget.css('-moz-transform', 'rotate(' + degree + 'deg)');
            mainTarget.css('-moz-transform-origin', '50% 50%');
            mainTarget.css('-webkit-transform', 'rotate(' + degree + 'deg)');
            mainTarget.css('-webkit-transform-origin', '50% 50%');
            mainTarget.css('-o-transform', 'rotate(' + degree + 'deg)');
            mainTarget.css('-o-transform-origin', '50% 50%');
            mainTarget.css('-ms-transform', 'rotate(' + degree + 'deg)');
            mainTarget.css('-ms-transform-origin', '50% 50%');
        }
    })
})
});

如果有人认为我错了,并且有更好的方法可以做到这一点,请告诉我..谢谢:)

答案 1 :(得分:0)

使用较新的jQuery v。您不必定位所有 - 特定于浏览器的属性。
仅使用transform

LIVE DEMO

var dragging = false;
$(function() {
    var target = $('#target');
    var mainTarget = $('#mainTarget');
    var rad = mainTarget.width()/2;
    var elOfs = mainTarget.offset();
    var elPos = {
       x: elOfs.left,
       y: elOfs.top
    };
    target.mousedown(function() {
        dragging = true;
    });
    $(document).mouseup(function() {
        dragging = false;
    });
    $(document).mousemove(function(e) {        
      if (dragging) {
        var mPos = {
          x: e.pageX-elPos.x,
          y: e.pageY-elPos.y
        };
        var getAtan = Math.atan2(mPos.x-rad, mPos.y-rad);
        var getDeg = -getAtan/(Math.PI/180) + 135;  //135 = (180deg-45deg)

        mainTarget.css({transform: 'rotate(' + getDeg + 'deg)'});
      }
    });
});

理想情况下,你可以这样做:

http://jsbin.com/ifezoq/2/edit

$(function() {
    var dragging = 0;
    var target     = $('#target');
    var mainTarget = $('#mainTarget');
    var elOfs = mainTarget.offset();
    var cent  = {X: mainTarget.width()/2, Y: mainTarget.height()/2};    
    var elPos = {X: elOfs.left, Y: elOfs.top};
    target.mousedown(function() {
        dragging = true;
    });
    $(document).mouseup(function() {
        dragging = 0;
    }).mousemove(function(e) {     
      if(dragging) {
         var mPos    = {X: e.pageX-elPos.X, Y: e.pageY-elPos.Y};
         var getAtan = Math.atan2(mPos.X-cent.X, mPos.Y-cent.Y);
         var getDeg  = -getAtan/(Math.PI/180) + 135; 
         mainTarget.css({transform: 'rotate(' + getDeg + 'deg)'});
      }
    });
});

但是如果你在圆圈内有一个方形图像,那么可拖动角落总是在45度。
但是你可以看到差距是在处理矩形时得到起始角度差异 - 你需要应用额外的数学,如果你问我就不需要,所以我建议第一个演示。