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cleanup...
Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
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3899e2c782
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(function($)
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{
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// This script was written by Steve Fenton
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// http://www.stevefenton.co.uk/Content/Jquery-Gestures/
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// Feel free to use this jQuery Plugin
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// Version: 1.0.1
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// Contributions by:
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var gesturesX = 0;
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var gesturesY = 0;
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$(document).mousemove( function (e) {
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gesturesX = parseInt(e.pageX, 10);
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gesturesY = parseInt(e.pageY, 10);
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});
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$.fn.gestures = function (settings) {
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var config = {
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classModifier: "gestures",
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tolerance: 25,
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startEvent: "mousedown",
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endEvent: "mouseup",
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advancedShapes: false,
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shapeSpeed: 200,
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showTrail: false,
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trailSpeed: 50,
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eventLimit: 5000,
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eventHandler: function (eventName, compassPoint) {
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// Local variable eventName, uses eight point compass directions for the drag direction
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// Also, eventStartX, eventStaryY, eventEndX, eventEndY are all available with the details!
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$("#gestureoutput").attr("tabindex", "0").html("Event name '" + eventName + "'. Started at (" + eventStartX + ", " + eventStartY + ") Ended at (" + eventEndX + ", " + eventEndY + ")")[0].focus();
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if (eventName != "falsealarm") {
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$This.html(eventName);
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}
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},
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eventHandlerAdvanced: function (directions) {
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// Local variable directions, returns a list of direction objects to be used to form a "shape"
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var output = GetCombinedName(directions, false, false);
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$("#gestureoutput").attr("tabindex", "0").html(output)[0].focus();
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}
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};
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if (settings) {
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$.extend(config, settings);
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}
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$This = null;
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$Body = null;
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var eventStartX = 0;
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var eventStartY = 0;
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var eventEndX = 0;
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var eventEndY = 0;
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var previousX = 0; // Advanced Tracking
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var previousY = 0; // Advanced Tracking
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var underEvent = false;
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var trailTimer = null;
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var shapeTimer = null;
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var eventTimer = null;
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// Determines the compass direction from a gesture
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function GetEvent(sx, sy, ex, ey) {
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var eventName = "none";
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var horizontalMovement = ex - sx;
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var verticalMovement = sy - ey;
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// Discard horizontal movements below the tolerance threshold
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if (horizontalMovement < config.tolerance && horizontalMovement > (config.tolerance * -1)) {
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horizontalMovement = 0;
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}
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// Discard vertical movements below the tolerance threshold
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if (verticalMovement < config.tolerance && verticalMovement > (config.tolerance * -1)) {
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verticalMovement = 0;
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}
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// For a diagonal move, horizontal should be within 50% of vertical otherwise we assume not diagonal
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if (horizontalMovement != 0 && verticalMovement != 0) {
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var h = horizontalMovement;
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var v = verticalMovement;
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// Use positive numbers for calculations
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if (h < 0) {
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h = h * -1;
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}
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if (v < 0) {
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v = v * -1;
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}
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// Check "diagonality" - if it isn't diagonal enough, make it flat
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if (h > v) {
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if (v < (h * 0.5)) {
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verticalMovement = 0;
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}
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} else {
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if (h < (v * 0.5)) {
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horizontalMovement = 0;
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}
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}
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}
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// Adjustments are all made... lets get the event...
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if (horizontalMovement != 0 && verticalMovement != 0) {
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eventName = "diagonal - direction to follow";
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if (horizontalMovement > 0) {
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if (verticalMovement > 0) {
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eventName = "NE";
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} else {
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eventName = "SE";
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}
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} else {
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if (verticalMovement > 0) {
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eventName = "NW";
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} else {
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eventName = "SW";
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}
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}
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} else if (horizontalMovement != 0) {
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if (horizontalMovement > 0) {
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eventName = "E";
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} else {
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eventName = "W";
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}
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} else if (verticalMovement != 0) {
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if (verticalMovement > 0) {
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eventName = "N";
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} else {
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eventName = "S";
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}
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} else {
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eventName = "falsealarm";
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}
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return eventName;
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}
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function GetCombinedName(directions, dropDiagonals, dropNonDiagonals) {
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var output = "";
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for (var i = 0; i < directions.length; i++) {
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var show = true;
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if (dropDiagonals) {
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if (directions[i].d.length == 2) {
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show = false;
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}
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}
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if (dropNonDiagonals) {
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if (directions[i].d.length == 1) {
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show = false;
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}
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}
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if (show) {
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output += directions[i].d + " ";
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}
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}
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return $.trim(output);
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}
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// Displays a trail for the mouse movement
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function TrackTrail() {
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if (underEvent) {
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$Body.append("<div class=\"" + config.classModifier + "motion\" style=\"position: absolute; top: " + gesturesY + "px; left :" + gesturesX + "px;\">.</div>");
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trailTimer = window.setTimeout(TrackTrail, config.trailSpeed);
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}
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}
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// Clears any trail
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function ClearTrail() {
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$("." + config.classModifier + "motion").fadeOut(1000, function () { $(this).remove(); });
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}
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var directionArray;
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function TrackDirections() {
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if (underEvent) {
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var xLength = gesturesX - previousX;
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var yLength = gesturesY - previousY;
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if (xLength < 0) {
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xLength = xLength * -1;
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}
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if (yLength < 0) {
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yLength = yLength * -1;
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}
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// If the lengths are over the ignorable tolerance
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if (xLength > config.tolerance || yLength > config.tolerance) {
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var direction = GetEvent(previousX, previousY, gesturesX, gesturesY);
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if (direction != "falsealarm") {
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previousX = gesturesX;
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previousY = gesturesY;
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if (directionArray.length == 0) {
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directionArray[directionArray.length] = { d: direction, lx: xLength, ly: yLength };
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config.eventHandler(direction);
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} else{
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if (direction != directionArray[directionArray.length - 1].d) {
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directionArray[directionArray.length] = { d: direction, lx: xLength, ly: yLength };
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config.eventHandler(direction);
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} else {
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directionArray[directionArray.length - 1].lx += xLength;
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directionArray[directionArray.length - 1].ly += yLength;
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}
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}
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}
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}
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shapeTimer = window.setTimeout(TrackDirections, config.shapeSpeed);
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}
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}
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// Starts tracking
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function StartTracking() {
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if (!underEvent) {
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underEvent = true;
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eventStartX = gesturesX;
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eventStartY = gesturesY;
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// In case the mouse up event is lost, this will force the stop event
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eventTimer = window.setTimeout(EndTracking, config.eventLimit);
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// Track Advanced Shapes
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if (config.advancedShapes) {
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previousX = gesturesX;
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previousY = gesturesY;
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directionArray = new Array();
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TrackDirections();
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}
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// Track Mouse Trail
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if (config.showTrail) {
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TrackTrail();
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}
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}
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}
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// Ends tracking
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function EndTracking() {
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window.clearTimeout(eventTimer);
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if (underEvent) {
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underEvent = false;
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eventEndX = gesturesX;
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eventEndY = gesturesY;
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// Track Advanced Shapes
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if (config.advancedShapes) {
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if (directionArray.length > 0) {
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config.eventHandlerAdvanced(directionArray);
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}
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} else {
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// Simple Event
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config.eventHandler(GetEvent(eventStartX, eventStartY, eventEndX, eventEndY));
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}
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// Track Mouse Trail
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if (config.showTrail) {
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ClearTrail();
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}
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}
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}
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return this.each( function () {
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$This = $(this);
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$Body = $("body").eq(0);
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$This.bind(config.startEvent, function () {
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StartTracking();
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return false;
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});
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$Body.bind(config.endEvent, function () {
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EndTracking();
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return false;
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});
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});
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return this;
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};
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})(jQuery);
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