| /* Flot plugin for adding the ability to pan and zoom the plot. |
| |
| Copyright (c) 2007-2014 IOLA and Ole Laursen. |
| Licensed under the MIT license. |
| |
| The default behaviour is double click and scrollwheel up/down to zoom in, drag |
| to pan. The plugin defines plot.zoom({ center }), plot.zoomOut() and |
| plot.pan( offset ) so you easily can add custom controls. It also fires |
| "plotpan" and "plotzoom" events, useful for synchronizing plots. |
| |
| The plugin supports these options: |
| |
| zoom: { |
| interactive: false |
| trigger: "dblclick" // or "click" for single click |
| amount: 1.5 // 2 = 200% (zoom in), 0.5 = 50% (zoom out) |
| } |
| |
| pan: { |
| interactive: false |
| cursor: "move" // CSS mouse cursor value used when dragging, e.g. "pointer" |
| frameRate: 20 |
| } |
| |
| xaxis, yaxis, x2axis, y2axis: { |
| zoomRange: null // or [ number, number ] (min range, max range) or false |
| panRange: null // or [ number, number ] (min, max) or false |
| } |
| |
| "interactive" enables the built-in drag/click behaviour. If you enable |
| interactive for pan, then you'll have a basic plot that supports moving |
| around; the same for zoom. |
| |
| "amount" specifies the default amount to zoom in (so 1.5 = 150%) relative to |
| the current viewport. |
| |
| "cursor" is a standard CSS mouse cursor string used for visual feedback to the |
| user when dragging. |
| |
| "frameRate" specifies the maximum number of times per second the plot will |
| update itself while the user is panning around on it (set to null to disable |
| intermediate pans, the plot will then not update until the mouse button is |
| released). |
| |
| "zoomRange" is the interval in which zooming can happen, e.g. with zoomRange: |
| [1, 100] the zoom will never scale the axis so that the difference between min |
| and max is smaller than 1 or larger than 100. You can set either end to null |
| to ignore, e.g. [1, null]. If you set zoomRange to false, zooming on that axis |
| will be disabled. |
| |
| "panRange" confines the panning to stay within a range, e.g. with panRange: |
| [-10, 20] panning stops at -10 in one end and at 20 in the other. Either can |
| be null, e.g. [-10, null]. If you set panRange to false, panning on that axis |
| will be disabled. |
| |
| Example API usage: |
| |
| plot = $.plot(...); |
| |
| // zoom default amount in on the pixel ( 10, 20 ) |
| plot.zoom({ center: { left: 10, top: 20 } }); |
| |
| // zoom out again |
| plot.zoomOut({ center: { left: 10, top: 20 } }); |
| |
| // zoom 200% in on the pixel (10, 20) |
| plot.zoom({ amount: 2, center: { left: 10, top: 20 } }); |
| |
| // pan 100 pixels to the left and 20 down |
| plot.pan({ left: -100, top: 20 }) |
| |
| Here, "center" specifies where the center of the zooming should happen. Note |
| that this is defined in pixel space, not the space of the data points (you can |
| use the p2c helpers on the axes in Flot to help you convert between these). |
| |
| "amount" is the amount to zoom the viewport relative to the current range, so |
| 1 is 100% (i.e. no change), 1.5 is 150% (zoom in), 0.7 is 70% (zoom out). You |
| can set the default in the options. |
| |
| */ |
| |
| // First two dependencies, jquery.event.drag.js and |
| // jquery.mousewheel.js, we put them inline here to save people the |
| // effort of downloading them. |
| |
| /* |
| jquery.event.drag.js ~ v1.5 ~ Copyright (c) 2008, Three Dub Media (http://threedubmedia.com) |
| Licensed under the MIT License ~ http://threedubmedia.googlecode.com/files/MIT-LICENSE.txt |
| */ |
| (function(a){function e(h){var k,j=this,l=h.data||{};if(l.elem)j=h.dragTarget=l.elem,h.dragProxy=d.proxy||j,h.cursorOffsetX=l.pageX-l.left,h.cursorOffsetY=l.pageY-l.top,h.offsetX=h.pageX-h.cursorOffsetX,h.offsetY=h.pageY-h.cursorOffsetY;else if(d.dragging||l.which>0&&h.which!=l.which||a(h.target).is(l.not))return;switch(h.type){case"mousedown":return a.extend(l,a(j).offset(),{elem:j,target:h.target,pageX:h.pageX,pageY:h.pageY}),b.add(document,"mousemove mouseup",e,l),i(j,!1),d.dragging=null,!1;case!d.dragging&&"mousemove":if(g(h.pageX-l.pageX)+g(h.pageY-l.pageY)<l.distance)break;h.target=l.target,k=f(h,"dragstart",j),k!==!1&&(d.dragging=j,d.proxy=h.dragProxy=a(k||j)[0]);case"mousemove":if(d.dragging){if(k=f(h,"drag",j),c.drop&&(c.drop.allowed=k!==!1,c.drop.handler(h)),k!==!1)break;h.type="mouseup"}case"mouseup":b.remove(document,"mousemove mouseup",e),d.dragging&&(c.drop&&c.drop.handler(h),f(h,"dragend",j)),i(j,!0),d.dragging=d.proxy=l.elem=!1}return!0}function f(b,c,d){b.type=c;var e=a.event.dispatch.call(d,b);return e===!1?!1:e||b.result}function g(a){return Math.pow(a,2)}function h(){return d.dragging===!1}function i(a,b){a&&(a.unselectable=b?"off":"on",a.onselectstart=function(){return b},a.style&&(a.style.MozUserSelect=b?"":"none"))}a.fn.drag=function(a,b,c){return b&&this.bind("dragstart",a),c&&this.bind("dragend",c),a?this.bind("drag",b?b:a):this.trigger("drag")};var b=a.event,c=b.special,d=c.drag={not:":input",distance:0,which:1,dragging:!1,setup:function(c){c=a.extend({distance:d.distance,which:d.which,not:d.not},c||{}),c.distance=g(c.distance),b.add(this,"mousedown",e,c),this.attachEvent&&this.attachEvent("ondragstart",h)},teardown:function(){b.remove(this,"mousedown",e),this===d.dragging&&(d.dragging=d.proxy=!1),i(this,!0),this.detachEvent&&this.detachEvent("ondragstart",h)}};c.dragstart=c.dragend={setup:function(){},teardown:function(){}}})(jQuery); |
| |
| /* jquery.mousewheel.min.js |
| * Copyright (c) 2011 Brandon Aaron (http://brandonaaron.net) |
| * Licensed under the MIT License (LICENSE.txt). |
| * Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers. |
| * Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix. |
| * Thanks to: Seamus Leahy for adding deltaX and deltaY |
| * |
| * Version: 3.0.6 |
| * |
| * Requires: 1.2.2+ |
| */ |
| (function(d){function e(a){var b=a||window.event,c=[].slice.call(arguments,1),f=0,e=0,g=0,a=d.event.fix(b);a.type="mousewheel";b.wheelDelta&&(f=b.wheelDelta/120);b.detail&&(f=-b.detail/3);g=f;void 0!==b.axis&&b.axis===b.HORIZONTAL_AXIS&&(g=0,e=-1*f);void 0!==b.wheelDeltaY&&(g=b.wheelDeltaY/120);void 0!==b.wheelDeltaX&&(e=-1*b.wheelDeltaX/120);c.unshift(a,f,e,g);return(d.event.dispatch||d.event.handle).apply(this,c)}var c=["DOMMouseScroll","mousewheel"];if(d.event.fixHooks)for(var h=c.length;h;)d.event.fixHooks[c[--h]]=d.event.mouseHooks;d.event.special.mousewheel={setup:function(){if(this.addEventListener)for(var a=c.length;a;)this.addEventListener(c[--a],e,!1);else this.onmousewheel=e},teardown:function(){if(this.removeEventListener)for(var a=c.length;a;)this.removeEventListener(c[--a],e,!1);else this.onmousewheel=null}};d.fn.extend({mousewheel:function(a){return a?this.bind("mousewheel",a):this.trigger("mousewheel")},unmousewheel:function(a){return this.unbind("mousewheel",a)}})})(jQuery); |
| |
| |
| |
| |
| (function ($) { |
| var options = { |
| xaxis: { |
| zoomRange: null, // or [number, number] (min range, max range) |
| panRange: null // or [number, number] (min, max) |
| }, |
| zoom: { |
| interactive: false, |
| trigger: "dblclick", // or "click" for single click |
| amount: 1.5 // how much to zoom relative to current position, 2 = 200% (zoom in), 0.5 = 50% (zoom out) |
| }, |
| pan: { |
| interactive: false, |
| cursor: "move", |
| frameRate: 20 |
| } |
| }; |
| |
| function init(plot) { |
| function onZoomClick(e, zoomOut) { |
| var c = plot.offset(); |
| c.left = e.pageX - c.left; |
| c.top = e.pageY - c.top; |
| if (zoomOut) |
| plot.zoomOut({ center: c }); |
| else |
| plot.zoom({ center: c }); |
| } |
| |
| function onMouseWheel(e, delta) { |
| e.preventDefault(); |
| onZoomClick(e, delta < 0); |
| return false; |
| } |
| |
| var prevCursor = 'default', prevPageX = 0, prevPageY = 0, |
| panTimeout = null; |
| |
| function onDragStart(e) { |
| if (e.which != 1) // only accept left-click |
| return false; |
| var c = plot.getPlaceholder().css('cursor'); |
| if (c) |
| prevCursor = c; |
| plot.getPlaceholder().css('cursor', plot.getOptions().pan.cursor); |
| prevPageX = e.pageX; |
| prevPageY = e.pageY; |
| } |
| |
| function onDrag(e) { |
| var frameRate = plot.getOptions().pan.frameRate; |
| if (panTimeout || !frameRate) |
| return; |
| |
| panTimeout = setTimeout(function () { |
| plot.pan({ left: prevPageX - e.pageX, |
| top: prevPageY - e.pageY }); |
| prevPageX = e.pageX; |
| prevPageY = e.pageY; |
| |
| panTimeout = null; |
| }, 1 / frameRate * 1000); |
| } |
| |
| function onDragEnd(e) { |
| if (panTimeout) { |
| clearTimeout(panTimeout); |
| panTimeout = null; |
| } |
| |
| plot.getPlaceholder().css('cursor', prevCursor); |
| plot.pan({ left: prevPageX - e.pageX, |
| top: prevPageY - e.pageY }); |
| } |
| |
| function bindEvents(plot, eventHolder) { |
| var o = plot.getOptions(); |
| if (o.zoom.interactive) { |
| eventHolder[o.zoom.trigger](onZoomClick); |
| eventHolder.mousewheel(onMouseWheel); |
| } |
| |
| if (o.pan.interactive) { |
| eventHolder.bind("dragstart", { distance: 10 }, onDragStart); |
| eventHolder.bind("drag", onDrag); |
| eventHolder.bind("dragend", onDragEnd); |
| } |
| } |
| |
| plot.zoomOut = function (args) { |
| if (!args) |
| args = {}; |
| |
| if (!args.amount) |
| args.amount = plot.getOptions().zoom.amount; |
| |
| args.amount = 1 / args.amount; |
| plot.zoom(args); |
| }; |
| |
| plot.zoom = function (args) { |
| if (!args) |
| args = {}; |
| |
| var c = args.center, |
| amount = args.amount || plot.getOptions().zoom.amount, |
| w = plot.width(), h = plot.height(); |
| |
| if (!c) |
| c = { left: w / 2, top: h / 2 }; |
| |
| var xf = c.left / w, |
| yf = c.top / h, |
| minmax = { |
| x: { |
| min: c.left - xf * w / amount, |
| max: c.left + (1 - xf) * w / amount |
| }, |
| y: { |
| min: c.top - yf * h / amount, |
| max: c.top + (1 - yf) * h / amount |
| } |
| }; |
| |
| $.each(plot.getAxes(), function(_, axis) { |
| var opts = axis.options, |
| min = minmax[axis.direction].min, |
| max = minmax[axis.direction].max, |
| zr = opts.zoomRange, |
| pr = opts.panRange; |
| |
| if (zr === false) // no zooming on this axis |
| return; |
| |
| min = axis.c2p(min); |
| max = axis.c2p(max); |
| if (min > max) { |
| // make sure min < max |
| var tmp = min; |
| min = max; |
| max = tmp; |
| } |
| |
| //Check that we are in panRange |
| if (pr) { |
| if (pr[0] != null && min < pr[0]) { |
| min = pr[0]; |
| } |
| if (pr[1] != null && max > pr[1]) { |
| max = pr[1]; |
| } |
| } |
| |
| var range = max - min; |
| if (zr && |
| ((zr[0] != null && range < zr[0] && amount >1) || |
| (zr[1] != null && range > zr[1] && amount <1))) |
| return; |
| |
| opts.min = min; |
| opts.max = max; |
| }); |
| |
| plot.setupGrid(); |
| plot.draw(); |
| |
| if (!args.preventEvent) |
| plot.getPlaceholder().trigger("plotzoom", [ plot, args ]); |
| }; |
| |
| plot.pan = function (args) { |
| var delta = { |
| x: +args.left, |
| y: +args.top |
| }; |
| |
| if (isNaN(delta.x)) |
| delta.x = 0; |
| if (isNaN(delta.y)) |
| delta.y = 0; |
| |
| $.each(plot.getAxes(), function (_, axis) { |
| var opts = axis.options, |
| min, max, d = delta[axis.direction]; |
| |
| min = axis.c2p(axis.p2c(axis.min) + d), |
| max = axis.c2p(axis.p2c(axis.max) + d); |
| |
| var pr = opts.panRange; |
| if (pr === false) // no panning on this axis |
| return; |
| |
| if (pr) { |
| // check whether we hit the wall |
| if (pr[0] != null && pr[0] > min) { |
| d = pr[0] - min; |
| min += d; |
| max += d; |
| } |
| |
| if (pr[1] != null && pr[1] < max) { |
| d = pr[1] - max; |
| min += d; |
| max += d; |
| } |
| } |
| |
| opts.min = min; |
| opts.max = max; |
| }); |
| |
| plot.setupGrid(); |
| plot.draw(); |
| |
| if (!args.preventEvent) |
| plot.getPlaceholder().trigger("plotpan", [ plot, args ]); |
| }; |
| |
| function shutdown(plot, eventHolder) { |
| eventHolder.unbind(plot.getOptions().zoom.trigger, onZoomClick); |
| eventHolder.unbind("mousewheel", onMouseWheel); |
| eventHolder.unbind("dragstart", onDragStart); |
| eventHolder.unbind("drag", onDrag); |
| eventHolder.unbind("dragend", onDragEnd); |
| if (panTimeout) |
| clearTimeout(panTimeout); |
| } |
| |
| plot.hooks.bindEvents.push(bindEvents); |
| plot.hooks.shutdown.push(shutdown); |
| } |
| |
| $.plot.plugins.push({ |
| init: init, |
| options: options, |
| name: 'navigate', |
| version: '1.3' |
| }); |
| })(jQuery); |
