1/* Flot plugin for adding the ability to pan and zoom the plot.
2
3Copyright (c) 2007-2013 IOLA and Ole Laursen.
4Licensed under the MIT license.
5
6The default behaviour is double click and scrollwheel up/down to zoom in, drag
7to pan. The plugin defines plot.zoom({ center }), plot.zoomOut() and
8plot.pan( offset ) so you easily can add custom controls. It also fires
9"plotpan" and "plotzoom" events, useful for synchronizing plots.
10
11The plugin supports these options:
12
13	zoom: {
14		interactive: false
15		trigger: "dblclick" // or "click" for single click
16		amount: 1.5         // 2 = 200% (zoom in), 0.5 = 50% (zoom out)
17	}
18
19	pan: {
20		interactive: false
21		cursor: "move"      // CSS mouse cursor value used when dragging, e.g. "pointer"
22		frameRate: 20
23	}
24
25	xaxis, yaxis, x2axis, y2axis: {
26		zoomRange: null  // or [ number, number ] (min range, max range) or false
27		panRange: null   // or [ number, number ] (min, max) or false
28	}
29
30"interactive" enables the built-in drag/click behaviour. If you enable
31interactive for pan, then you'll have a basic plot that supports moving
32around; the same for zoom.
33
34"amount" specifies the default amount to zoom in (so 1.5 = 150%) relative to
35the current viewport.
36
37"cursor" is a standard CSS mouse cursor string used for visual feedback to the
38user when dragging.
39
40"frameRate" specifies the maximum number of times per second the plot will
41update itself while the user is panning around on it (set to null to disable
42intermediate pans, the plot will then not update until the mouse button is
43released).
44
45"zoomRange" is the interval in which zooming can happen, e.g. with zoomRange:
46[1, 100] the zoom will never scale the axis so that the difference between min
47and max is smaller than 1 or larger than 100. You can set either end to null
48to ignore, e.g. [1, null]. If you set zoomRange to false, zooming on that axis
49will be disabled.
50
51"panRange" confines the panning to stay within a range, e.g. with panRange:
52[-10, 20] panning stops at -10 in one end and at 20 in the other. Either can
53be null, e.g. [-10, null]. If you set panRange to false, panning on that axis
54will be disabled.
55
56Example API usage:
57
58	plot = $.plot(...);
59
60	// zoom default amount in on the pixel ( 10, 20 )
61	plot.zoom({ center: { left: 10, top: 20 } });
62
63	// zoom out again
64	plot.zoomOut({ center: { left: 10, top: 20 } });
65
66	// zoom 200% in on the pixel (10, 20)
67	plot.zoom({ amount: 2, center: { left: 10, top: 20 } });
68
69	// pan 100 pixels to the left and 20 down
70	plot.pan({ left: -100, top: 20 })
71
72Here, "center" specifies where the center of the zooming should happen. Note
73that this is defined in pixel space, not the space of the data points (you can
74use the p2c helpers on the axes in Flot to help you convert between these).
75
76"amount" is the amount to zoom the viewport relative to the current range, so
771 is 100% (i.e. no change), 1.5 is 150% (zoom in), 0.7 is 70% (zoom out). You
78can set the default in the options.
79
80*/// First two dependencies, jquery.event.drag.js and
81// jquery.mousewheel.js, we put them inline here to save people the
82// effort of downloading them.
83/*
84jquery.event.drag.js ~ v1.5 ~ Copyright (c) 2008, Three Dub Media (http://threedubmedia.com)
85Licensed under the MIT License ~ http://threedubmedia.googlecode.com/files/MIT-LICENSE.txt
86*/(function(e){function t(i){var l,h=this,p=i.data||{};if(p.elem)h=i.dragTarget=p.elem,i.dragProxy=a.proxy||h,i.cursorOffsetX=p.pageX-p.left,i.cursorOffsetY=p.pageY-p.top,i.offsetX=i.pageX-i.cursorOffsetX,i.offsetY=i.pageY-i.cursorOffsetY;else if(a.dragging||p.which>0&&i.which!=p.which||e(i.target).is(p.not))return;switch(i.type){case"mousedown":return e.extend(p,e(h).offset(),{elem:h,target:i.target,pageX:i.pageX,pageY:i.pageY}),o.add(document,"mousemove mouseup",t,p),s(h,!1),a.dragging=null,!1;case!a.dragging&&"mousemove":if(r(i.pageX-p.pageX)+r(i.pageY-p.pageY)<p.distance)break;i.target=p.target,l=n(i,"dragstart",h),l!==!1&&(a.dragging=h,a.proxy=i.dragProxy=e(l||h)[0]);case"mousemove":if(a.dragging){if(l=n(i,"drag",h),u.drop&&(u.drop.allowed=l!==!1,u.drop.handler(i)),l!==!1)break;i.type="mouseup"};case"mouseup":o.remove(document,"mousemove mouseup",t),a.dragging&&(u.drop&&u.drop.handler(i),n(i,"dragend",h)),s(h,!0),a.dragging=a.proxy=p.elem=!1}return!0}function n(t,n,r){t.type=n;var i=e.event.dispatch.call(r,t);return i===!1?!1:i||t.result}function r(e){return Math.pow(e,2)}function i(){return a.dragging===!1}function s(e,t){e&&(e.unselectable=t?"off":"on",e.onselectstart=function(){return t},e.style&&(e.style.MozUserSelect=t?"":"none"))}e.fn.drag=function(e,t,n){return t&&this.bind("dragstart",e),n&&this.bind("dragend",n),e?this.bind("drag",t?t:e):this.trigger("drag")};var o=e.event,u=o.special,a=u.drag={not:":input",distance:0,which:1,dragging:!1,setup:function(n){n=e.extend({distance:a.distance,which:a.which,not:a.not},n||{}),n.distance=r(n.distance),o.add(this,"mousedown",t,n),this.attachEvent&&this.attachEvent("ondragstart",i)},teardown:function(){o.remove(this,"mousedown",t),this===a.dragging&&(a.dragging=a.proxy=!1),s(this,!0),this.detachEvent&&this.detachEvent("ondragstart",i)}};u.dragstart=u.dragend={setup:function(){},teardown:function(){}}})(jQuery),function(e){function t(t){var n=t||window.event,r=[].slice.call(arguments,1),i=0,s=0,o=0,t=e.event.fix(n);return t.type="mousewheel",n.wheelDelta&&(i=n.wheelDelta/120),n.detail&&(i=-n.detail/3),o=i,void 0!==n.axis&&n.axis===n.HORIZONTAL_AXIS&&(o=0,s=-1*i),void 0!==n.wheelDeltaY&&(o=n.wheelDeltaY/120),void 0!==n.wheelDeltaX&&(s=-1*n.wheelDeltaX/120),r.unshift(t,i,s,o),(e.event.dispatch||e.event.handle).apply(this,r)}var n=["DOMMouseScroll","mousewheel"];if(e.event.fixHooks)for(var r=n.length;r;)e.event.fixHooks[n[--r]]=e.event.mouseHooks;e.event.special.mousewheel={setup:function(){if(this.addEventListener)for(var e=n.length;e;)this.addEventListener(n[--e],t,!1);else this.onmousewheel=t},teardown:function(){if(this.removeEventListener)for(var e=n.length;e;)this.removeEventListener(n[--e],t,!1);else this.onmousewheel=null}},e.fn.extend({mousewheel:function(e){return e?this.bind("mousewheel",e):this.trigger("mousewheel")},unmousewheel:function(e){return this.unbind("mousewheel",e)}})}(jQuery),function(e){function n(t){function n(e,n){var r=t.offset();r.left=e.pageX-r.left,r.top=e.pageY-r.top,n?t.zoomOut({center:r}):t.zoom({center:r})}function r(e,t){return e.preventDefault(),n(e,t<0),!1}function a(e){if(e.which!=1)return!1;var n=t.getPlaceholder().css("cursor");n&&(i=n),t.getPlaceholder().css("cursor",t.getOptions().pan.cursor),s=e.pageX,o=e.pageY}function f(e){var n=t.getOptions().pan.frameRate;if(u||!n)return;u=setTimeout(function(){t.pan({left:s-e.pageX,top:o-e.pageY}),s=e.pageX,o=e.pageY,u=null},1/n*1e3)}function l(e){u&&(clearTimeout(u),u=null),t.getPlaceholder().css("cursor",i),t.pan({left:s-e.pageX,top:o-e.pageY})}function c(e,t){var i=e.getOptions();i.zoom.interactive&&(t[i.zoom.trigger](n),t.mousewheel(r)),i.pan.interactive&&(t.bind("dragstart",{distance:10},a),t.bind("drag",f),t.bind("dragend",l))}function h(e,t){t.unbind(e.getOptions().zoom.trigger,n),t.unbind("mousewheel",r),t.unbind("dragstart",a),t.unbind("drag",f),t.unbind("dragend",l),u&&clearTimeout(u)}var i="default",s=0,o=0,u=null;t.zoomOut=function(e){e||(e={}),e.amount||(e.amount=t.getOptions().zoom.amount),e.amount=1/e.amount,t.zoom(e)},t.zoom=function(n){n||(n={});var r=n.center,i=n.amount||t.getOptions().zoom.amount,s=t.width(),o=t.height();r||(r={left:s/2,top:o/2});var u=r.left/s,a=r.top/o,f={x:{min:r.left-u*s/i,max:r.left+(1-u)*s/i},y:{min:r.top-a*o/i,max:r.top+(1-a)*o/i}};e.each(t.getAxes(),function(e,t){var n=t.options,r=f[t.direction].min,i=f[t.direction].max,s=n.zoomRange,o=n.panRange;if(s===!1)return;r=t.c2p(r),i=t.c2p(i);if(r>i){var u=r;r=i,i=u}o&&(o[0]!=null&&r<o[0]&&(r=o[0]),o[1]!=null&&i>o[1]&&(i=o[1]));var a=i-r;if(s&&(s[0]!=null&&a<s[0]||s[1]!=null&&a>s[1]))return;n.min=r,n.max=i}),t.setupGrid(),t.draw(),n.preventEvent||t.getPlaceholder().trigger("plotzoom",[t,n])},t.pan=function(n){var r={x:+n.left,y:+n.top};isNaN(r.x)&&(r.x=0),isNaN(r.y)&&(r.y=0),e.each(t.getAxes(),function(e,t){var n=t.options,i,s,o=r[t.direction];i=t.c2p(t.p2c(t.min)+o),s=t.c2p(t.p2c(t.max)+o);var u=n.panRange;if(u===!1)return;u&&(u[0]!=null&&u[0]>i&&(o=u[0]-i,i+=o,s+=o),u[1]!=null&&u[1]<s&&(o=u[1]-s,i+=o,s+=o)),n.min=i,n.max=s}),t.setupGrid(),t.draw(),n.preventEvent||t.getPlaceholder().trigger("plotpan",[t,n])},t.hooks.bindEvents.push(c),t.hooks.shutdown.push(h)}var t={xaxis:{zoomRange:null,panRange:null},zoom:{interactive:!1,trigger:"dblclick",amount:1.5},pan:{interactive:!1,cursor:"move",frameRate:20}};e.plot.plugins.push({init:n,options:t,name:"navigate",version:"1.3"})}(jQuery);