1 /* Flot plugin for adding the ability to pan and zoom the plot. 2 3 Copyright (c) 2007-2013 IOLA and Ole Laursen. 4 Licensed under the MIT license. 5 6 The default behaviour is double click and scrollwheel up/down to zoom in, drag 7 to pan. The plugin defines plot.zoom({ center }), plot.zoomOut() and 8 plot.pan( offset ) so you easily can add custom controls. It also fires 9 "plotpan" and "plotzoom" events, useful for synchronizing plots. 10 11 The 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 31 interactive for pan, then you'll have a basic plot that supports moving 32 around; the same for zoom. 33 34 "amount" specifies the default amount to zoom in (so 1.5 = 150%) relative to 35 the current viewport. 36 37 "cursor" is a standard CSS mouse cursor string used for visual feedback to the 38 user when dragging. 39 40 "frameRate" specifies the maximum number of times per second the plot will 41 update itself while the user is panning around on it (set to null to disable 42 intermediate pans, the plot will then not update until the mouse button is 43 released). 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 47 and max is smaller than 1 or larger than 100. You can set either end to null 48 to ignore, e.g. [1, null]. If you set zoomRange to false, zooming on that axis 49 will 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 53 be null, e.g. [-10, null]. If you set panRange to false, panning on that axis 54 will be disabled. 55 56 Example 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 72 Here, "center" specifies where the center of the zooming should happen. Note 73 that this is defined in pixel space, not the space of the data points (you can 74 use 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 77 1 is 100% (i.e. no change), 1.5 is 150% (zoom in), 0.7 is 70% (zoom out). You 78 can 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 /* 84 jquery.event.drag.js ~ v1.5 ~ Copyright (c) 2008, Three Dub Media (http://threedubmedia.com) 85 Licensed 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);
