server/monitor/src/main/resources/web/flot/jquery.flot.selection.js - accumulo - Git at Google

 /*
 Flot plugin for selecting regions.

 The plugin defines the following options:

   selection: {
     mode: null or "x" or "y" or "xy",
     color: color
   }

 Selection support is enabled by setting the mode to one of "x", "y" or
 "xy". In "x" mode, the user will only be able to specify the x range,
 similarly for "y" mode. For "xy", the selection becomes a rectangle
 where both ranges can be specified. "color" is color of the selection
 (if you need to change the color later on, you can get to it with
 plot.getOptions().selection.color).

 When selection support is enabled, a "plotselected" event will be
 emitted on the DOM element you passed into the plot function. The
 event handler gets a parameter with the ranges selected on the axes,
 like this:

   placeholder.bind("plotselected", function(event, ranges) {
     alert("You selected " + ranges.xaxis.from + " to " + ranges.xaxis.to)
     // similar for yaxis - with multiple axes, the extra ones are in
     // x2axis, x3axis, ...
   });

 The "plotselected" event is only fired when the user has finished
 making the selection. A "plotselecting" event is fired during the
 process with the same parameters as the "plotselected" event, in case
 you want to know what's happening while it's happening,

 A "plotunselected" event with no arguments is emitted when the user
 clicks the mouse to remove the selection.

 The plugin allso adds the following methods to the plot object:

 - setSelection(ranges, preventEvent)

   Set the selection rectangle. The passed in ranges is on the same
   form as returned in the "plotselected" event. If the selection mode
   is "x", you should put in either an xaxis range, if the mode is "y"
   you need to put in an yaxis range and both xaxis and yaxis if the
   selection mode is "xy", like this:

     setSelection({ xaxis: { from: 0, to: 10 }, yaxis: { from: 40, to: 60 } });

   setSelection will trigger the "plotselected" event when called. If
   you don't want that to happen, e.g. if you're inside a
   "plotselected" handler, pass true as the second parameter. If you
   are using multiple axes, you can specify the ranges on any of those,
   e.g. as x2axis/x3axis/... instead of xaxis, the plugin picks the
   first one it sees.

 - clearSelection(preventEvent)

   Clear the selection rectangle. Pass in true to avoid getting a
   "plotunselected" event.

 - getSelection()

   Returns the current selection in the same format as the
   "plotselected" event. If there's currently no selection, the
   function returns null.

 */

 (function ($) {
     function init(plot) {
         var selection = {
                 first: { x: -1, y: -1}, second: { x: -1, y: -1},
                 show: false,
                 active: false
             };

         // FIXME: The drag handling implemented here should be
         // abstracted out, there's some similar code from a library in
         // the navigation plugin, this should be massaged a bit to fit
         // the Flot cases here better and reused. Doing this would
         // make this plugin much slimmer.
         var savedhandlers = {};

         var mouseUpHandler = null;

         function onMouseMove(e) {
             if (selection.active) {
                 updateSelection(e);

                 plot.getPlaceholder().trigger("plotselecting", [ getSelection() ]);
             }
         }

         function onMouseDown(e) {
             if (e.which != 1)  // only accept left-click
                 return;

             // cancel out any text selections
             document.body.focus();

             // prevent text selection and drag in old-school browsers
             if (document.onselectstart !== undefined && savedhandlers.onselectstart == null) {
                 savedhandlers.onselectstart = document.onselectstart;
                 document.onselectstart = function () { return false; };
             }
             if (document.ondrag !== undefined && savedhandlers.ondrag == null) {
                 savedhandlers.ondrag = document.ondrag;
                 document.ondrag = function () { return false; };
             }

             setSelectionPos(selection.first, e);

             selection.active = true;

             // this is a bit silly, but we have to use a closure to be
             // able to whack the same handler again
             mouseUpHandler = function (e) { onMouseUp(e); };

             $(document).one("mouseup", mouseUpHandler);
         }

         function onMouseUp(e) {
             mouseUpHandler = null;

             // revert drag stuff for old-school browsers
             if (document.onselectstart !== undefined)
                 document.onselectstart = savedhandlers.onselectstart;
             if (document.ondrag !== undefined)
                 document.ondrag = savedhandlers.ondrag;

             // no more dragging
             selection.active = false;
             updateSelection(e);

             if (selectionIsSane())
                 triggerSelectedEvent();
             else {
                 // this counts as a clear
                 plot.getPlaceholder().trigger("plotunselected", [ ]);
                 plot.getPlaceholder().trigger("plotselecting", [ null ]);
             }

             return false;
         }

         function getSelection() {
             if (!selectionIsSane())
                 return null;

             var r = {}, c1 = selection.first, c2 = selection.second;
             $.each(plot.getAxes(), function (name, axis) {
                 if (axis.used) {
                     var p1 = axis.c2p(c1[axis.direction]), p2 = axis.c2p(c2[axis.direction]);
                     r[name] = { from: Math.min(p1, p2), to: Math.max(p1, p2) };
                 }
             });
             return r;
         }

         function triggerSelectedEvent() {
             var r = getSelection();

             plot.getPlaceholder().trigger("plotselected", [ r ]);

             // backwards-compat stuff, to be removed in future
             if (r.xaxis && r.yaxis)
                 plot.getPlaceholder().trigger("selected", [ { x1: r.xaxis.from, y1: r.yaxis.from, x2: r.xaxis.to, y2: r.yaxis.to } ]);
         }

         function clamp(min, value, max) {
             return value < min ? min: (value > max ? max: value);
         }

         function setSelectionPos(pos, e) {
             var o = plot.getOptions();
             var offset = plot.getPlaceholder().offset();
             var plotOffset = plot.getPlotOffset();
             pos.x = clamp(0, e.pageX - offset.left - plotOffset.left, plot.width());
             pos.y = clamp(0, e.pageY - offset.top - plotOffset.top, plot.height());

             if (o.selection.mode == "y")
                 pos.x = pos == selection.first ? 0 : plot.width();

             if (o.selection.mode == "x")
                 pos.y = pos == selection.first ? 0 : plot.height();
         }

         function updateSelection(pos) {
             if (pos.pageX == null)
                 return;

             setSelectionPos(selection.second, pos);
             if (selectionIsSane()) {
                 selection.show = true;
                 plot.triggerRedrawOverlay();
             }
             else
                 clearSelection(true);
         }

         function clearSelection(preventEvent) {
             if (selection.show) {
                 selection.show = false;
                 plot.triggerRedrawOverlay();
                 if (!preventEvent)
                     plot.getPlaceholder().trigger("plotunselected", [ ]);
             }
         }

         // function taken from markings support in Flot
         function extractRange(ranges, coord) {
             var axis, from, to, key, axes = plot.getAxes();

             for (var k in axes) {
                 axis = axes[k];
                 if (axis.direction == coord) {
                     key = coord + axis.n + "axis";
                     if (!ranges[key] && axis.n == 1)
                         key = coord + "axis"; // support x1axis as xaxis
                     if (ranges[key]) {
                         from = ranges[key].from;
                         to = ranges[key].to;
                         break;
                     }
                 }
             }

             // backwards-compat stuff - to be removed in future
             if (!ranges[key]) {
                 axis = coord == "x" ? plot.getXAxes()[0] : plot.getYAxes()[0];
                 from = ranges[coord + "1"];
                 to = ranges[coord + "2"];
             }

             // auto-reverse as an added bonus
             if (from != null && to != null && from > to) {
                 var tmp = from;
                 from = to;
                 to = tmp;
             }

             return { from: from, to: to, axis: axis };
         }

         function setSelection(ranges, preventEvent) {
             var axis, range, o = plot.getOptions();

             if (o.selection.mode == "y") {
                 selection.first.x = 0;
                 selection.second.x = plot.width();
             }
             else {
                 range = extractRange(ranges, "x");

                 selection.first.x = range.axis.p2c(range.from);
                 selection.second.x = range.axis.p2c(range.to);
             }

             if (o.selection.mode == "x") {
                 selection.first.y = 0;
                 selection.second.y = plot.height();
             }
             else {
                 range = extractRange(ranges, "y");

                 selection.first.y = range.axis.p2c(range.from);
                 selection.second.y = range.axis.p2c(range.to);
             }

             selection.show = true;
             plot.triggerRedrawOverlay();
             if (!preventEvent && selectionIsSane())
                 triggerSelectedEvent();
         }

         function selectionIsSane() {
             var minSize = 5;
             return Math.abs(selection.second.x - selection.first.x) >= minSize &&
                 Math.abs(selection.second.y - selection.first.y) >= minSize;
         }

         plot.clearSelection = clearSelection;
         plot.setSelection = setSelection;
         plot.getSelection = getSelection;

         plot.hooks.bindEvents.push(function(plot, eventHolder) {
             var o = plot.getOptions();
             if (o.selection.mode != null) {
                 eventHolder.mousemove(onMouseMove);
                 eventHolder.mousedown(onMouseDown);
             }
         });


         plot.hooks.drawOverlay.push(function (plot, ctx) {
             // draw selection
             if (selection.show && selectionIsSane()) {
                 var plotOffset = plot.getPlotOffset();
                 var o = plot.getOptions();

                 ctx.save();
                 ctx.translate(plotOffset.left, plotOffset.top);

                 var c = $.color.parse(o.selection.color);

                 ctx.strokeStyle = c.scale('a', 0.8).toString();
                 ctx.lineWidth = 1;
                 ctx.lineJoin = "round";
                 ctx.fillStyle = c.scale('a', 0.4).toString();

                 var x = Math.min(selection.first.x, selection.second.x),
                     y = Math.min(selection.first.y, selection.second.y),
                     w = Math.abs(selection.second.x - selection.first.x),
                     h = Math.abs(selection.second.y - selection.first.y);

                 ctx.fillRect(x, y, w, h);
                 ctx.strokeRect(x, y, w, h);

                 ctx.restore();
             }
         });

         plot.hooks.shutdown.push(function (plot, eventHolder) {
             eventHolder.unbind("mousemove", onMouseMove);
             eventHolder.unbind("mousedown", onMouseDown);

             if (mouseUpHandler)
                 $(document).unbind("mouseup", mouseUpHandler);
         });

     }

     $.plot.plugins.push({
         init: init,
         options: {
             selection: {
                 mode: null, // one of null, "x", "y" or "xy"
                 color: "#e8cfac"
             }
         },
         name: 'selection',
         version: '1.1'
     });
 })(jQuery);
	/*
	Flot plugin for selecting regions.

	The plugin defines the following options:

	selection: {
	mode: null or "x" or "y" or "xy",
	color: color
	}

	Selection support is enabled by setting the mode to one of "x", "y" or
	"xy". In "x" mode, the user will only be able to specify the x range,
	similarly for "y" mode. For "xy", the selection becomes a rectangle
	where both ranges can be specified. "color" is color of the selection
	(if you need to change the color later on, you can get to it with
	plot.getOptions().selection.color).

	When selection support is enabled, a "plotselected" event will be
	emitted on the DOM element you passed into the plot function. The
	event handler gets a parameter with the ranges selected on the axes,
	like this:

	placeholder.bind("plotselected", function(event, ranges) {
	alert("You selected " + ranges.xaxis.from + " to " + ranges.xaxis.to)
	// similar for yaxis - with multiple axes, the extra ones are in
	// x2axis, x3axis, ...
	});

	The "plotselected" event is only fired when the user has finished
	making the selection. A "plotselecting" event is fired during the
	process with the same parameters as the "plotselected" event, in case
	you want to know what's happening while it's happening,

	A "plotunselected" event with no arguments is emitted when the user
	clicks the mouse to remove the selection.

	The plugin allso adds the following methods to the plot object:

	- setSelection(ranges, preventEvent)

	Set the selection rectangle. The passed in ranges is on the same
	form as returned in the "plotselected" event. If the selection mode
	is "x", you should put in either an xaxis range, if the mode is "y"
	you need to put in an yaxis range and both xaxis and yaxis if the
	selection mode is "xy", like this:

	setSelection({ xaxis: { from: 0, to: 10 }, yaxis: { from: 40, to: 60 } });

	setSelection will trigger the "plotselected" event when called. If
	you don't want that to happen, e.g. if you're inside a
	"plotselected" handler, pass true as the second parameter. If you
	are using multiple axes, you can specify the ranges on any of those,
	e.g. as x2axis/x3axis/... instead of xaxis, the plugin picks the
	first one it sees.

	- clearSelection(preventEvent)

	Clear the selection rectangle. Pass in true to avoid getting a
	"plotunselected" event.

	- getSelection()

	Returns the current selection in the same format as the
	"plotselected" event. If there's currently no selection, the
	function returns null.

	*/

	(function ($) {
	function init(plot) {
	var selection = {
	first: { x: -1, y: -1}, second: { x: -1, y: -1},
	show: false,
	active: false
	};

	// FIXME: The drag handling implemented here should be
	// abstracted out, there's some similar code from a library in
	// the navigation plugin, this should be massaged a bit to fit
	// the Flot cases here better and reused. Doing this would
	// make this plugin much slimmer.
	var savedhandlers = {};

	var mouseUpHandler = null;

	function onMouseMove(e) {
	if (selection.active) {
	updateSelection(e);

	plot.getPlaceholder().trigger("plotselecting", [ getSelection() ]);
	}
	}

	function onMouseDown(e) {
	if (e.which != 1) // only accept left-click
	return;

	// cancel out any text selections
	document.body.focus();

	// prevent text selection and drag in old-school browsers
	if (document.onselectstart !== undefined && savedhandlers.onselectstart == null) {
	savedhandlers.onselectstart = document.onselectstart;
	document.onselectstart = function () { return false; };
	}
	if (document.ondrag !== undefined && savedhandlers.ondrag == null) {
	savedhandlers.ondrag = document.ondrag;
	document.ondrag = function () { return false; };
	}

	setSelectionPos(selection.first, e);

	selection.active = true;

	// this is a bit silly, but we have to use a closure to be
	// able to whack the same handler again
	mouseUpHandler = function (e) { onMouseUp(e); };

	$(document).one("mouseup", mouseUpHandler);
	}

	function onMouseUp(e) {
	mouseUpHandler = null;

	// revert drag stuff for old-school browsers
	if (document.onselectstart !== undefined)
	document.onselectstart = savedhandlers.onselectstart;
	if (document.ondrag !== undefined)
	document.ondrag = savedhandlers.ondrag;

	// no more dragging
	selection.active = false;
	updateSelection(e);

	if (selectionIsSane())
	triggerSelectedEvent();
	else {
	// this counts as a clear
	plot.getPlaceholder().trigger("plotunselected", [ ]);
	plot.getPlaceholder().trigger("plotselecting", [ null ]);
	}

	return false;
	}

	function getSelection() {
	if (!selectionIsSane())
	return null;

	var r = {}, c1 = selection.first, c2 = selection.second;
	$.each(plot.getAxes(), function (name, axis) {
	if (axis.used) {
	var p1 = axis.c2p(c1[axis.direction]), p2 = axis.c2p(c2[axis.direction]);
	r[name] = { from: Math.min(p1, p2), to: Math.max(p1, p2) };
	}
	});
	return r;
	}

	function triggerSelectedEvent() {
	var r = getSelection();

	plot.getPlaceholder().trigger("plotselected", [ r ]);

	// backwards-compat stuff, to be removed in future
	if (r.xaxis && r.yaxis)
	plot.getPlaceholder().trigger("selected", [ { x1: r.xaxis.from, y1: r.yaxis.from, x2: r.xaxis.to, y2: r.yaxis.to } ]);
	}

	function clamp(min, value, max) {
	return value < min ? min: (value > max ? max: value);
	}

	function setSelectionPos(pos, e) {
	var o = plot.getOptions();
	var offset = plot.getPlaceholder().offset();
	var plotOffset = plot.getPlotOffset();
	pos.x = clamp(0, e.pageX - offset.left - plotOffset.left, plot.width());
	pos.y = clamp(0, e.pageY - offset.top - plotOffset.top, plot.height());

	if (o.selection.mode == "y")
	pos.x = pos == selection.first ? 0 : plot.width();

	if (o.selection.mode == "x")
	pos.y = pos == selection.first ? 0 : plot.height();
	}

	function updateSelection(pos) {
	if (pos.pageX == null)
	return;

	setSelectionPos(selection.second, pos);
	if (selectionIsSane()) {
	selection.show = true;
	plot.triggerRedrawOverlay();
	}
	else
	clearSelection(true);
	}

	function clearSelection(preventEvent) {
	if (selection.show) {
	selection.show = false;
	plot.triggerRedrawOverlay();
	if (!preventEvent)
	plot.getPlaceholder().trigger("plotunselected", [ ]);
	}
	}

	// function taken from markings support in Flot
	function extractRange(ranges, coord) {
	var axis, from, to, key, axes = plot.getAxes();

	for (var k in axes) {
	axis = axes[k];
	if (axis.direction == coord) {
	key = coord + axis.n + "axis";
	if (!ranges[key] && axis.n == 1)
	key = coord + "axis"; // support x1axis as xaxis
	if (ranges[key]) {
	from = ranges[key].from;
	to = ranges[key].to;
	break;
	}
	}
	}

	// backwards-compat stuff - to be removed in future
	if (!ranges[key]) {
	axis = coord == "x" ? plot.getXAxes()[0] : plot.getYAxes()[0];
	from = ranges[coord + "1"];
	to = ranges[coord + "2"];
	}

	// auto-reverse as an added bonus
	if (from != null && to != null && from > to) {
	var tmp = from;
	from = to;
	to = tmp;
	}

	return { from: from, to: to, axis: axis };
	}

	function setSelection(ranges, preventEvent) {
	var axis, range, o = plot.getOptions();

	if (o.selection.mode == "y") {
	selection.first.x = 0;
	selection.second.x = plot.width();
	}
	else {
	range = extractRange(ranges, "x");

	selection.first.x = range.axis.p2c(range.from);
	selection.second.x = range.axis.p2c(range.to);
	}

	if (o.selection.mode == "x") {
	selection.first.y = 0;
	selection.second.y = plot.height();
	}
	else {
	range = extractRange(ranges, "y");

	selection.first.y = range.axis.p2c(range.from);
	selection.second.y = range.axis.p2c(range.to);
	}

	selection.show = true;
	plot.triggerRedrawOverlay();
	if (!preventEvent && selectionIsSane())
	triggerSelectedEvent();
	}

	function selectionIsSane() {
	var minSize = 5;
	return Math.abs(selection.second.x - selection.first.x) >= minSize &&
	Math.abs(selection.second.y - selection.first.y) >= minSize;
	}

	plot.clearSelection = clearSelection;
	plot.setSelection = setSelection;
	plot.getSelection = getSelection;

	plot.hooks.bindEvents.push(function(plot, eventHolder) {
	var o = plot.getOptions();
	if (o.selection.mode != null) {
	eventHolder.mousemove(onMouseMove);
	eventHolder.mousedown(onMouseDown);
	}
	});


	plot.hooks.drawOverlay.push(function (plot, ctx) {
	// draw selection
	if (selection.show && selectionIsSane()) {
	var plotOffset = plot.getPlotOffset();
	var o = plot.getOptions();

	ctx.save();
	ctx.translate(plotOffset.left, plotOffset.top);

	var c = $.color.parse(o.selection.color);

	ctx.strokeStyle = c.scale('a', 0.8).toString();
	ctx.lineWidth = 1;
	ctx.lineJoin = "round";
	ctx.fillStyle = c.scale('a', 0.4).toString();

	var x = Math.min(selection.first.x, selection.second.x),
	y = Math.min(selection.first.y, selection.second.y),
	w = Math.abs(selection.second.x - selection.first.x),
	h = Math.abs(selection.second.y - selection.first.y);

	ctx.fillRect(x, y, w, h);
	ctx.strokeRect(x, y, w, h);

	ctx.restore();
	}
	});

	plot.hooks.shutdown.push(function (plot, eventHolder) {
	eventHolder.unbind("mousemove", onMouseMove);
	eventHolder.unbind("mousedown", onMouseDown);

	if (mouseUpHandler)
	$(document).unbind("mouseup", mouseUpHandler);
	});

	}

	$.plot.plugins.push({
	init: init,
	options: {
	selection: {
	mode: null, // one of null, "x", "y" or "xy"
	color: "#e8cfac"
	}
	},
	name: 'selection',
	version: '1.1'
	});
	})(jQuery);