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Commit 0c5bb75f authored by olau@iola.dk's avatar olau@iola.dk
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Added navigate plugin for panning and zooming 


git-svn-id: https://flot.googlecode.com/svn/trunk@186 1e0a6537-2640-0410-bfb7-f154510ff394
parent 237861e9
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NEWS.txt
View file @ 0c5bb75f
......@@ -107,6 +107,8 @@ Changes:
- Image plugin: plot prerendered images.
- Navigation plugin for panning and zooming a plot.
Bug fixes:
......
examples/index.html
View file @ 0c5bb75f
......@@ -26,6 +26,7 @@
<li><a href="turning-series.html">Turning series on/off</a></li>
<li><a href="selection.html">Selection support and zooming</a> and <a href="zooming.html">zooming with overview</a></li>
<li><a href="interacting.html">Interacting with the data points</a></li>
<li><a href="navigate.html">Panning and zooming</a> (with plugin)</li>
</ul>
<p>Some more esoteric features:</p>
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examples/navigate.html 0 → 100644
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Flot Examples</title>
<link href="layout.css" rel="stylesheet" type="text/css"></link>
<!--[if IE]><script language="javascript" type="text/javascript" src="../excanvas.min.js"></script><![endif]-->
<script language="javascript" type="text/javascript" src="../jquery.js"></script>
<script language="javascript" type="text/javascript" src="../jquery.flot.js"></script>
<script language="javascript" type="text/javascript" src="../jquery.flot.navigate.js"></script>
<style>
#placeholder .button {
position: absolute;
cursor: pointer;
}
#placeholder div.button {
font-size: smaller;
color: #999;
background-color: #eee;
padding: 2px;
}
.message {
padding-left: 50px;
font-size: smaller;
}
</style>
</head>
<body>
<h1>Flot Examples</h1>
<div id="placeholder" style="width:600px;height:300px;"></div>
<p class="message"></p>
<p>With the navigate plugin it is easy to add panning and
zooming. Drag to pan, double click to zoom. The plugin fires
events (useful for synchronizing several plots) and adds a
couple of public methods so you can easily build
a little user interface around it, like the little buttons
at the top right in the plot.</p>
<script id="source" language="javascript" type="text/javascript">
$(function () {
// generate data set from a parametric function with a fractal
// look
function sumf(f, t, m) {
var res = 0;
for (var i = 1; i < m; ++i)
res += f(i * i * t) / (i * i);
return res;
}
var d1 = [];
for (var t = 0; t <= 2 * Math.PI; t += 0.01)
d1.push([sumf(Math.cos, t, 10), sumf(Math.sin, t, 10)]);
var data = [ d1 ];
var placeholder = $("#placeholder");
var options = {
series: { lines: { show: true }, shadowSize: 0 },
xaxis: { zoomRange: [0.1, 10], panRange: [-10, 10] },
yaxis: { zoomRange: [0.1, 10], panRange: [-10, 10] },
zoom: {
enable: true
},
pan: {
enable: true
}
};
var plot = $.plot(placeholder, data, options);
// show pan/zoom messages to illustrate events
placeholder.bind('plotpan', function (event, plot) {
var axes = plot.getAxes();
$(".message").html("Panning to x: " + axes.xaxis.min.toFixed(2)
+ " &ndash; " + axes.xaxis.max.toFixed(2)
+ " and y: " + axes.yaxis.min.toFixed(2)
+ " &ndash; " + axes.yaxis.max.toFixed(2));
});
placeholder.bind('plotzoom', function (event, plot) {
var axes = plot.getAxes();
$(".message").html("Zooming to x: " + axes.xaxis.min.toFixed(2)
+ " &ndash; " + axes.xaxis.max.toFixed(2)
+ " and y: " + axes.yaxis.min.toFixed(2)
+ " &ndash; " + axes.yaxis.max.toFixed(2));
});
// add zoom out button
$('<div class="button" style="right:20px;top:20px">zoom out</div>').appendTo(placeholder).click(function (e) {
e.preventDefault();
plot.zoomOut();
});
// and add panning buttons
// little helper for taking the repetitive work out of placing
// panning arrows
function addArrow(dir, right, top, offset) {
$('<img class="button" src="arrow-' + dir + '.gif" style="right:' + right + 'px;top:' + top + 'px">').appendTo(placeholder).click(function (e) {
e.preventDefault();
plot.pan(offset);
});
}
addArrow('left', 55, 60, { left: -100 });
addArrow('right', 25, 60, { left: 100 });
addArrow('up', 40, 45, { top: -100 });
addArrow('down', 40, 75, { top: 100 });
});
</script>
</body>
</html>
jquery.flot.navigate.js 0 → 100644
View file @ 0c5bb75f
/*
Flot plugin for adding panning and zooming capabilities to a plot.
The default behaviour is double click 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
a "plotpan" and "plotzoom" event when something happens, useful for
synchronizing plots.
Example usage:
plot = $.plot(...);
// zoom default amount in on the pixel (100, 200)
plot.zoom({ center: { left: 10, top: 20 } });
// zoom out again
plot.zoomOut();
// pan 100 pixels to the left and 20 down
plot.pan({ left: -100, top: 20 })
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
}
xaxis, yaxis, x2axis, y2axis: {
zoomRange: null // or [number, number] (min range, max range)
panRange: null // or [number, number] (min, max)
}
"interactive" enables the built-in drag/click behaviour. "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).
"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 of them to null to ignore.
"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.
*/
/*
First an inline dependency:
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(E){E.fn.drag=function(L,K,J){if(K){this.bind("dragstart",L)}if(J){this.bind("dragend",J)}return !L?this.trigger("drag"):this.bind("drag",K?K:L)};var A=E.event,B=A.special,F=B.drag={not:":input",distance:0,which:1,dragging:false,setup:function(J){J=E.extend({distance:F.distance,which:F.which,not:F.not},J||{});J.distance=I(J.distance);A.add(this,"mousedown",H,J);if(this.attachEvent){this.attachEvent("ondragstart",D)}},teardown:function(){A.remove(this,"mousedown",H);if(this===F.dragging){F.dragging=F.proxy=false}G(this,true);if(this.detachEvent){this.detachEvent("ondragstart",D)}}};B.dragstart=B.dragend={setup:function(){},teardown:function(){}};function H(L){var K=this,J,M=L.data||{};if(M.elem){K=L.dragTarget=M.elem;L.dragProxy=F.proxy||K;L.cursorOffsetX=M.pageX-M.left;L.cursorOffsetY=M.pageY-M.top;L.offsetX=L.pageX-L.cursorOffsetX;L.offsetY=L.pageY-L.cursorOffsetY}else{if(F.dragging||(M.which>0&&L.which!=M.which)||E(L.target).is(M.not)){return }}switch(L.type){case"mousedown":E.extend(M,E(K).offset(),{elem:K,target:L.target,pageX:L.pageX,pageY:L.pageY});A.add(document,"mousemove mouseup",H,M);G(K,false);F.dragging=null;return false;case !F.dragging&&"mousemove":if(I(L.pageX-M.pageX)+I(L.pageY-M.pageY)<M.distance){break}L.target=M.target;J=C(L,"dragstart",K);if(J!==false){F.dragging=K;F.proxy=L.dragProxy=E(J||K)[0]}case"mousemove":if(F.dragging){J=C(L,"drag",K);if(B.drop){B.drop.allowed=(J!==false);B.drop.handler(L)}if(J!==false){break}L.type="mouseup"}case"mouseup":A.remove(document,"mousemove mouseup",H);if(F.dragging){if(B.drop){B.drop.handler(L)}C(L,"dragend",K)}G(K,true);F.dragging=F.proxy=M.elem=false;break}return true}function C(M,K,L){M.type=K;var J=E.event.handle.call(L,M);return J===false?false:J||M.result}function I(J){return Math.pow(J,2)}function D(){return(F.dragging===false)}function G(K,J){if(!K){return }K.unselectable=J?"off":"on";K.onselectstart=function(){return J};if(K.style){K.style.MozUserSelect=J?"":"none"}}})(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
}
};
function init(plot) {
var prevPoint = null;
function bindEvents(plot, eventHolder) {
var o = plot.getOptions();
if (o.zoom.interactive)
eventHolder[o.zoom.trigger](function (e) {
prevPoint = plot.offset();
prevPoint.left = e.pageX - prevPoint.left;
prevPoint.top = e.pageY - prevPoint.top;
plot.zoom({ center: prevPoint });
});
if (o.pan.interactive) {
var prevCursor = 'default', pageX = 0, pageY = 0;
eventHolder.bind("dragstart", { distance: 10 }, function (e) {
if (e.which != 1) // only accept left-click
return false;
eventHolderCursor = eventHolder.css('cursor');
eventHolder.css('cursor', 'move');
pageX = e.pageX;
pageY = e.pageY;
});
eventHolder.bind("drag", function (e) {
// unused at the moment, but we need it here to
// trigger the dragstart/dragend events
});
eventHolder.bind("dragend", function (e) {
eventHolder.css('cursor', prevCursor);
plot.pan({ left: pageX - e.pageX,
top: pageY - e.pageY });
});
}
}
plot.zoomOut = function () {
plot.zoom({ amount: 1 / plot.getOptions().zoom.amount });
prevPoint = null;
}
plot.zoom = function (args) {
var axes = plot.getAxes(),
options = plot.getOptions(),
c = args.center ? args.center : prevPoint,
amount = args.amount ? args.amount : options.zoom.amount,
w = plot.width(), h = plot.height();
if (!c)
c = { left: w / 2, top: h / 2 };
var xf = c.left / w,
x1 = c.left - xf * w / amount,
x2 = c.left + (1 - xf) * w / amount,
yf = c.top / h,
y1 = c.top - yf * h / amount,
y2 = c.top + (1 - yf) * h / amount;
function scaleAxis(min, max, name) {
var axis = axes[name],
axisOptions = options[name];
if (!axis.used)
return;
min = axis.c2p(min);
max = axis.c2p(max);
if (max < min) { // make sure min < max
var tmp = min
min = max;
max = tmp;
}
var range = max - min, zr = axisOptions.zoomRange;
if (zr &&
((zr[0] != null && range < zr[0]) ||
(zr[1] != null && range > zr[1])))
return;
axisOptions.min = min;
axisOptions.max = max;
}
scaleAxis(x1, x2, 'xaxis');
scaleAxis(x1, x2, 'x2axis');
scaleAxis(y1, y2, 'yaxis');
scaleAxis(y1, y2, 'y2axis');
plot.setupGrid();
plot.draw();
if (!args.preventEvent)
plot.getPlaceholder().trigger("plotzoom", [ plot ]);
}
plot.pan = function (args) {
var l = +args.left, t = +args.top,
axes = plot.getAxes(), options = plot.getOptions();
if (isNaN(l))
l = 0;
if (isNaN(t))
t = 0;
function panAxis(delta, name) {
var axis = axes[name],
axisOptions = options[name],
min, max;
if (!axis.used)
return;
min = axis.c2p(axis.p2c(axis.min) + delta),
max = axis.c2p(axis.p2c(axis.max) + delta);
var pr = axisOptions.panRange;
if (pr) {
// check whether we hit the wall
if (pr[0] != null && pr[0] > min) {
delta = pr[0] - min;
min += delta;
max += delta;
}
if (pr[1] != null && pr[1] < max) {
delta = pr[1] - max;
min += delta;
max += delta;
}
}
axisOptions.min = min;
axisOptions.max = max;
}
panAxis(l, 'xaxis');
panAxis(l, 'x2axis');
panAxis(t, 'yaxis');
panAxis(t, 'y2axis');
plot.setupGrid();
plot.draw();
if (!args.preventEvent)
plot.getPlaceholder().trigger("plotpan", [ plot ]);
}
plot.hooks.bindEvents.push(bindEvents);
}
$.plot.plugins.push({
init: init,
options: options,
name: 'navigate',
version: '1.0'
});
})(jQuery);
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