CSS3渐变效果代码,Css代码库,德仔网

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【Css】 CSS3渐变效果
作者:凡程子 / 发布于2013/7/1/ 622

	var Drag = {

	 obj : null,

	 init : function(o, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)
	 {
	 o.onmousedown = Drag.start;

	 o.hmode = bSwapHorzRef ? false : true ;
	 o.vmode = bSwapVertRef ? false : true ;

	 o.root = oRoot && oRoot != null ? oRoot : o ;

	 if (o.hmode && isNaN(parseInt(o.root.style.left ))) o.root.style.left = "0px";
	 //if (o.vmode && isNaN(parseInt(o.root.style.top ))) o.root.style.top = "0px";
	 if (!o.hmode && isNaN(parseInt(o.root.style.right ))) o.root.style.right = "0px";
	 // if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = "0px";

	 o.minX = typeof minX != 'undefined' ? minX : null;
	 o.minY = typeof minY != 'undefined' ? minY : null;
	 o.maxX = typeof maxX != 'undefined' ? maxX : null;
	 o.maxY = typeof maxY != 'undefined' ? maxY : null;

	 o.xMapper = fXMapper ? fXMapper : null;
	 o.yMapper = fYMapper ? fYMapper : null;

	 o.root.onDragStart = new Function();
	 o.root.onDragEnd = new Function();
	 o.root.onDrag = new Function();
	 },

	 start : function(e)
	 {
	 gradx.current_slider_id = "#"+this.id;

	 var o = Drag.obj = this;
	 e = Drag.fixE(e);
	 var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
	 var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
	 o.root.onDragStart(x, y);

	 o.lastMouseX = e.clientX;
	 o.lastMouseY = e.clientY;

	 if (o.hmode) {
	 if (o.minX != null) o.minMouseX = e.clientX - x + o.minX;
	 if (o.maxX != null) o.maxMouseX = o.minMouseX + o.maxX - o.minX;
	 } else {
	 if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;
	 if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;
	 }

	 if (o.vmode) {
	 if (o.minY != null) o.minMouseY = e.clientY - y + o.minY;
	 if (o.maxY != null) o.maxMouseY = o.minMouseY + o.maxY - o.minY;
	 }
	 else {
	 if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;
	 if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;
	 }

	 document.onmousemove = Drag.drag;
	 document.onmouseup = Drag.end;

	 return false;
	 },

	 drag : function(e)
	 {
	 e = Drag.fixE(e);
	 var o = Drag.obj;

	 gradx.update_style_array();
	 gradx.apply_style(gradx.panel, gradx.get_style_value());
	 var left = gradx.gx("#"+o.id).css("left");

	
	 if(parseInt(left) > 60 && parseInt(left) < 390) {
	 gradx.gx("#gradx_slider_info") //info element cached before
	 .css("left",left)
	 .show();
	
	 }/*else {
	 if(parseInt(left) > 120) {
	 left = "272px";
	 }else{
	 left = "120px";
	 }
	
	 gradx.gx("#gradx_slider_info") //info element cached before
	 .css("left",left)
	 .show();
	
	 }*/
	 var color = gradx.gx("#"+o.id).css("backgroundColor");
	 //but what happens if @color is not in RGB ? :(
	 var rgb = gradx.get_rgb_obj(color);
	 gradx.cp.spectrum("set",rgb);

	
	 var ey = e.clientY;
	 var ex = e.clientX;
	 var y = parseInt(o.vmode ? o.root.style.top : o.root.style.bottom);
	 var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
	 var nx, ny;

	 if (o.minX != null) ex = o.hmode ? Math.max(ex, o.minMouseX) : Math.min(ex, o.maxMouseX);
	 if (o.maxX != null) ex = o.hmode ? Math.min(ex, o.maxMouseX) : Math.max(ex, o.minMouseX);
	 if (o.minY != null) ey = o.vmode ? Math.max(ey, o.minMouseY) : Math.min(ey, o.maxMouseY);
	 if (o.maxY != null) ey = o.vmode ? Math.min(ey, o.maxMouseY) : Math.max(ey, o.minMouseY);

	 nx = x + ((ex - o.lastMouseX) * (o.hmode ? 1 : -1));
	 ny = y + ((ey - o.lastMouseY) * (o.vmode ? 1 : -1));

	 if (o.xMapper) nx = o.xMapper(y)
	 else if (o.yMapper) ny = o.yMapper(x)

	 Drag.obj.root.style[o.hmode ? "left" : "right"] = nx + "px";
	 //Drag.obj.root.style[o.vmode ? "top" : "bottom"] = ny + "px";
	 Drag.obj.lastMouseX = ex;
	 Drag.obj.lastMouseY = ey;

	 Drag.obj.root.onDrag(nx, ny);
	 return false;
	 },

	 end : function()
	 {
	 document.onmousemove = null;
	 document.onmouseup = null;
	 Drag.obj.root.onDragEnd( parseInt(Drag.obj.root.style[Drag.obj.hmode ? "left" : "right"]),
	 parseInt(Drag.obj.root.style[Drag.obj.vmode ? "top" : "bottom"]));
	 Drag.obj = null;
	 },

	 fixE : function(e)
	 {
	 if (typeof e == 'undefined') e = window.event;
	 if (typeof e.layerX == 'undefined') e.layerX = e.offsetX;
	 if (typeof e.layerY == 'undefined') e.layerY = e.offsetY;
	 return e;
	 }
	};
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