mirror of
https://github.com/pierre42100/ComunicWeb
synced 2024-12-05 01:44:07 +00:00
361 lines
13 KiB
JavaScript
361 lines
13 KiB
JavaScript
|
/* Flot plugin for selecting regions of a plot.
|
||
|
|
|
||
|
|
Copyright (c) 2007-2013 IOLA and Ole Laursen.
|
||
|
|
Licensed under the MIT license.
|
||
|
|
|
||
|
|
The plugin supports these options:
|
||
|
|
|
||
|
|
selection: {
|
||
|
|
mode: null or "x" or "y" or "xy",
|
||
|
|
color: color,
|
||
|
|
shape: "round" or "miter" or "bevel",
|
||
|
|
minSize: number of pixels
|
||
|
|
}
|
||
|
|
|
||
|
|
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). "shape"
|
||
|
|
is the shape of the corners of the selection.
|
||
|
|
|
||
|
|
"minSize" is the minimum size a selection can be in pixels. This value can
|
||
|
|
be customized to determine the smallest size a selection can be and still
|
||
|
|
have the selection rectangle be displayed. When customizing this value, the
|
||
|
|
fact that it refers to pixels, not axis units must be taken into account.
|
||
|
|
Thus, for example, if there is a bar graph in time mode with BarWidth set to 1
|
||
|
|
minute, setting "minSize" to 1 will not make the minimum selection size 1
|
||
|
|
minute, but rather 1 pixel. Note also that setting "minSize" to 0 will prevent
|
||
|
|
"plotunselected" events from being fired when the user clicks the mouse without
|
||
|
|
dragging.
|
||
|
|
|
||
|
|
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. As stated above, setting "minSize" to 0 will
|
||
|
|
destroy this behavior.
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
if (!selection.show) 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 = plot.getOptions().selection.minSize;
|
||
|
|
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 = o.selection.shape;
|
||
|
|
ctx.fillStyle = c.scale('a', 0.4).toString();
|
||
|
|
|
||
|
|
var x = Math.min(selection.first.x, selection.second.x) + 0.5,
|
||
|
|
y = Math.min(selection.first.y, selection.second.y) + 0.5,
|
||
|
|
w = Math.abs(selection.second.x - selection.first.x) - 1,
|
||
|
|
h = Math.abs(selection.second.y - selection.first.y) - 1;
|
||
|
|
|
||
|
|
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",
|
||
|
|
shape: "round", // one of "round", "miter", or "bevel"
|
||
|
|
minSize: 5 // minimum number of pixels
|
||
|
|
}
|
||
|
|
},
|
||
|
|
name: 'selection',
|
||
|
|
version: '1.1'
|
||
|
|
});
|
||
|
|
})(jQuery);
|