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Utils.js
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Utils.js
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// This file is part of DQX - (C) Copyright 2014, Paul Vauterin, Ben Jeffery, Alistair Miles <[email protected]>
// This program is free software licensed under the GNU Affero General Public License.
// You can find a copy of this license in LICENSE in the top directory of the source code or at <http://opensource.org/licenses/AGPL-3.0>
/************************************************************************************************************************************
*************************************************************************************************************************************
*************************************************************************************************************************************
*************************************************************************************************************************************/
define(["require", "jquery", "DQX/Msg", "DQX/DocEl", "handlebars"],
function (require, $, Msg, DocEl, Handlebars) {
//Inject DQX into the global namespace so that click handlers can find it
DQX = {};
// A class helping the scheduling of functions that execute asynchronously
DQX.Scheduler = function() {
var that = {};
that.scheduledFunctions = [];
that.completedTokens = {}
// Add a sceduled function. The execution will only start if all required tokens are marked as completed
that.add = function(requiredTokens, func) {
that.scheduledFunctions.push({
requiredList: requiredTokens,
func: func
});
};
// Call this function to mark a token as being completed
that.setCompleted = function(token) {
that.completedTokens[token] = true;
};
// Call this function to set a notification function that will be called when all actions are completed
that.setOnFullyCompleted = function(handler) {
that._onFullyCompleted = handler;
}
that._tryNext = function() {
var nextAction = null;
var completed = true;
$.each(that.scheduledFunctions, function(idx, item) {
if (!item.started) {
completed = false;
var canExecute = true;
$.each(item.requiredList, function(idx2, requiredToken) {
if (!that.completedTokens[requiredToken])
canExecute = false;
});
if (canExecute)
nextAction = item;
}
});
if (nextAction) {
nextAction.started = true;
nextAction.func();
}
if (!completed)
setTimeout(that._tryNext, 50);
else
if (that._onFullyCompleted)
that._onFullyCompleted();
};
// Start the execution of the scheduled functions
that.execute = function() {
that._tryNext();
}
return that;
}
DQX.getRGB = function(r, g, b, alpha) {
if (r != null && b == null) {
alpha = g;
b = r&0xFF;
g = r>>8&0xFF;
r = r>>16&0xFF;
}
r = Math.round(r);
g = Math.round(g);
b = Math.round(b);
if (alpha == null) {
return "rgb("+r+","+g+","+b+")";
} else {
return "rgba("+r+","+g+","+b+","+alpha+")";
}
};
DQX.roundedRect = function(ctx, x, y, width, height, radius) {
ctx.beginPath();
ctx.moveTo(x + radius, y);
ctx.lineTo(x + width - radius, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
ctx.lineTo(x + width, y + height - radius);
ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
ctx.lineTo(x + radius, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
ctx.lineTo(x, y + radius);
ctx.quadraticCurveTo(x, y, x + radius, y);
ctx.closePath();
};
DQX.polyStar = function(ctx, x, y, radius, sides, pointSize, angle) {
ctx.beginPath();
if (pointSize == null) { pointSize = 0; }
pointSize = 1-pointSize;
if (angle == null) { angle = 0; }
else { angle /= 180/Math.PI; }
var a = Math.PI/sides;
ctx.moveTo(x+Math.cos(angle)*radius, y+Math.sin(angle)*radius);
for (var i=0; i<sides; i++) {
angle += a;
if (pointSize != 1) {
ctx.lineTo(x+Math.cos(angle)*radius*pointSize, y+Math.sin(angle)*radius*pointSize);
}
angle += a;
ctx.lineTo(x+Math.cos(angle)*radius, y+Math.sin(angle)*radius);
}
ctx.closePath();
};
// Returns a function that wraps around the argument function fn, making sure it is called not more often than delay specifies
DQX.debounce = function(fn, delay) {
var timer = null;
return function () {
var context = this, args = arguments;
clearTimeout(timer);
timer = setTimeout(function () {
fn.apply(context, args);
}, delay);
};
};
DQX.BMP = function (name) {
return require.toUrl('./Bitmaps/'+name);
};
DQX._globalUniqueID = 0;
DQX.getNextUniqueID = function () {
DQX._globalUniqueID++;
return 'UID' + DQX._globalUniqueID;
}
DQX.reportError = function (txt) {
alert("ERROR: " + DQX.interpolate(txt));
if (_debug_)
debugger;
throw txt;
}
//Sort helpers
DQX.ByProperty = function (prop) {
return function (a, b) {
if (typeof a[prop] == "number") {
return (a[prop] - b[prop]);
} else {
return ((a[prop] < b[prop]) ? -1 : ((a[prop] > b[prop]) ? 1 : 0));
}
};
};
DQX.ByPropertyReverse = function (prop) {
return function (b, a) {
if (typeof a[prop] == "number") {
return (a[prop] - b[prop]);
} else {
return ((a[prop] < b[prop]) ? -1 : ((a[prop] > b[prop]) ? 1 : 0));
}
};
};
//Returns a html string that highlights every occurrence of a specific string in a flat text
DQX.highlightText = function (data, search) {
function preg_quote(str) { return (str + '').replace(/([\\\.\+\*\?\[\^\]\$\(\)\{\}\=\!\<\>\|\:])/g, "\\$1"); }
//horrendous hack - don't do this, we do here as 1.6 is EOL
data = data.match(/<[^> ]+[^>]*>[^<]*/g);
dataOut = ''
for (var i=0; i < data.length; i++) {
var split=data[i].split('>')
dataOut = dataOut + split[0] + '>' + split[1].replace(new RegExp("(" + preg_quote(search) + ")", 'gi'), '<span class="DQXHighlight">$1</span>');
}
return dataOut;
}
DQX.pluralise = function (str, number) {
if (number != 1) {
return str + 's';
}
return str;
}
DQX.truncateString = function (fullStr, strLen, separator) {
if (fullStr.length <= strLen) return fullStr;
separator = separator || '...';
var sepLen = separator.length,
charsToShow = strLen - sepLen,
frontChars = Math.ceil(charsToShow/2),
backChars = Math.floor(charsToShow/2);
return fullStr.substr(0, frontChars) +
separator +
fullStr.substr(fullStr.length - backChars);
};
DQX.isStandaloneApp = function () {
if ('navigator' in window)
if ('standalone' in window.navigator)
return window.navigator.standalone;
return false;
}
DQX.getUrlSearchString = function(token) {
var tokens = window.location.search.substring(1).split('&');
for (var tokennr = 0; tokennr < tokens.length; tokennr++) {
if (tokens[tokennr]) {
var tokenpair = tokens[tokennr].split('=');
if (tokenpair[0]==token) return tokenpair[1];
}
}
return null;
}
DQX.serverDataStore = function(serverUrl, content, callback) {
$.ajax({
url: serverUrl+'?datatype=storedata',
type: "post",
data: content,
success: function (resp) {
var keylist = DQX.parseResponse(resp);
if ("Error" in keylist) {
DQX.reportError('Failed to store server data: '+keylist.Error);
return;
}
var id=keylist.id;
if (callback) callback(id);
},
error: function (resp) {
DQX.reportError('Failed to store server data');
}
});
}
DQX.serverDataStoreLong = function(serverUrl, content, callback) {
$.ajax({
url: serverUrl+'?datatype=storedatalong',
type: "post",
data: content,
success: function (resp) {
var keylist = DQX.parseResponse(resp);
if ("Error" in keylist) {
DQX.reportError('Failed to store server data: '+keylist.Error);
return;
}
var id=keylist.id;
if (callback) callback(id);
},
error: function (resp) {
DQX.reportError('Failed to store server data');
}
});
}
DQX.serverDataFetch = function(serverUrl, id, callback) {
$.ajax({
url: serverUrl+'?datatype=fetchstoredata&id='+id,
success: function (resp) {
var keylist = DQX.parseResponse(resp);
if ("Error" in keylist) {
DQX.reportError('Failed to fetch server data: '+keylist.Error);
return;
}
var content=keylist.content;
if (callback) callback(content);
},
error: function (resp) {
DQX.reportError('Failed to fetch server data');
}
});
}
DQX.customRequest = function(serverUrl,respmodule,respid,data,callback) {
var theUrl = serverUrl+'?datatype=custom&respmodule='+respmodule+'&respid='+respid;
$.each(data,function(id,val) {
theUrl += '&'+id+'='+val;
});
$.ajax({
url: theUrl,
success: function (resp) {
var keylist = DQX.parseResponse(resp);
if (typeof(keylist) !== 'object') {
if (resp.indexOf('Authentication')>0)
DQX.reportError('Client is not authenticated');
DQX.reportError('Invalid server response type');
}
if ('Error' in keylist) {
if (keylist.Error=='NotAuthenticated') {
if (confirm('The application is currently not authenticated.\nDo you want to reload now?')) {
location.reload();
return;
}
alert('Application has been stopped');
}
else
alert('Error: '+keylist.Error);
}
if (callback) callback(keylist);
},
error: function (resp) {
DQX.reportError('Failed to launch request {module} {id}:\n{rsp}'.DQXformat( { module:respmodule, id:respid, rsp:JSON.stringify(resp) } ));
}
});
}
DQX.timeoutRetry = 30000;
DQX.timeoutAjax = 120000;
//A namespace for drawing helper utilities
DQX.DrawUtil = {};
DQX.TextOrig = function (snippetID) {
var elem = $('#Snippets').children('#' + snippetID);
if (elem.length == 0)
DQX.reportError('Invalid snippet ID ' + snippetID);
return elem.html();
}
DQX.Text = function (snippetID) {
return DQX.interpolate(DQX.TextOrig(snippetID));
}
//determines if an object has a specific member
DQX.hasMember = function (tryobj, membername) {
if (typeof (tryobj) != 'object') return false;
return membername in tryobj;
}
//reports an error if an object does not have a specific member
DQX.requireMember = function (tryobj, membername) {
if (typeof (tryobj) != 'object')
DQX.reportError('variable cannot have a member because it is not an object');
if (!(membername in tryobj))
DQX.reportError('Object should have member "{memb}"'.DQXformat({ memb: membername }));
}
//reports an error if an object does not have a specific function
DQX.requireMemberFunction = function (tryobj, membername) {
DQX.requireMember(tryobj, membername);
DQX.checkIsFunction(tryobj[membername]);
}
//reports an error if the argument is not a string
DQX.checkIsString = function (value) {
if (typeof value != 'string') DQX.reportError('Expected string value');
}
//reports an error if the argument is not a boolean
DQX.checkIsBoolean = function (value) {
if (typeof value != 'boolean') DQX.reportError('Expected boolean value');
}
//reports an error if the argument is not a number
DQX.checkIsNumber = function (value) {
if (typeof value != 'number') DQX.reportError('Expected number value');
}
//reports an error if the argument is not a function
DQX.checkIsFunction = function (value) {
if (typeof value != 'function') DQX.reportError('Expected function');
}
//A formatter extension for strings
//usage: "Hello {name}".DQXformat({ name: 'World' })
String.prototype.DQXformat = function (args) {
var newStr = this;
for (var key in args) {
newStr = newStr.replace('{' + key + '}', args[key]);
}
return newStr;
}
//A helper function that can be called to report an error if an object does not have a specific member
DQX.assertPresence = function (obj, memb) {
if (!(memb in obj))
DQX.reportError("Expected member '" + memb + "'");
}
DQX.ranseed = 0;
//A random number generator that can be initiated with a predefined seed
DQX.random = function () {
DQX.ranseed = (DQX.ranseed * 9301 + 49297) % 233280;
return DQX.ranseed / (233280.0);
}
DQX.Timer = function () {
var that = {}
var now = new Date();
that.ticks0 = now.getTime();
that.Elapsed = function () {
var now = new Date();
return (now.getTime() - that.ticks0) / 1000.0;
}
return that;
}
DQX.parseResponse = function (resp) {
//lst = JSON.parse(resp);
lst = resp;
return lst;
}
DQX._activityList = [];
DQX._updateActivityStatus = function () {
if (DQX._activityList.length > 0) {
if ($('#DQXActivityBox').length == 0) {
var DocEl = require("DQX/DocEl");
var box = DocEl.Div({ id: 'DQXActivityBox' });
box.addStyle("position", "absolute");
box.addStyle("left", '0px');
box.addStyle("top", '0px');
box.addStyle('background-color', 'rgb(255,128,128)');
$('#DQXUtilContainer').append(box.toString());
}
var content = [];
$.each(DQX._activityList, function (idx, el) { content += el + '<br>'; });
$('#DQXActivityBox').html(content);
}
else {
$('#DQXActivityBox').remove();
}
}
DQX.pushActivity = function (msg) {
DQX._activityList.push(msg);
DQX._updateActivityStatus();
}
DQX.popActivity = function () {
DQX._activityList.pop();
DQX._updateActivityStatus();
}
DQX.executeActivity = function (msg, activity) {
DQX.pushActivity(msg);
activity();
DQX.popActivity();
}
DQX._processingRequestCount = 0;
//Draws a message on the screen indicating that some processing is being done
DQX.setProcessing = function (msg) {
if (DQX._processingRequestCount == 0) {
var DocEl = require("DQX/DocEl");
var background = DocEl.Div({ id: 'InfoBoxProcessing' });
background.addStyle("position", "absolute");
background.addStyle("left", '0px');
background.addStyle("top", '0px');
background.addStyle('width', '100%');
background.addStyle('height', '100%');
background.addStyle('cursor', 'wait');
//background.addStyle('background-color', 'rgba(100,100,100,0.2)');
background.addStyle('z-index', '9999');
var box = DocEl.Div({ id: 'Box', parent: background });
box.addStyle("position", "fixed");
box.addStyle("top", '50%');
box.addStyle("left", '50%');
box.addStyle("margin-top", '-30px');
box.addStyle("margin-left", '-30px');
box.addElem('<img src="Bitmaps/ProgressAnimation3.gif" alt="Progress animation" />');
$('#DQXUtilContainer').append(background.toString());
}
DQX._processingRequestCount++;
}
//Executes a function and show a processing indication during the execution
DQX.executeProcessing = function (fnc) {
DQX.setProcessing();
setTimeout(function () {
fnc();
DQX.stopProcessing();
}, 20);
}
//Removes the processing message
DQX.stopProcessing = function () {
if (DQX._processingRequestCount == 1)
$("#InfoBoxProcessing").remove();
DQX._processingRequestCount--;
if (DQX._processingRequestCount < 0)
DQX._processingRequestCount = 0;
}
//Creates a function that reports a failure
DQX.createFailFunction = function (msg) {
return function () {
DQX.stopProcessing();
alert(msg);
};
}
//Creates a function that reports a failire
DQX.createMessageFailFunction = function () {
return function (msg) {
DQX.stopProcessing();
alert(msg);
};
}
//A class that encapsulates the creation of an url with query strings
DQX.Url = function (iname) {
var that = {};
that.name = iname;
that.queryitems = []
//add a query item to the url
that.addUrlQueryItem = function (iname, icontent) {
this.queryitems.push({ name: iname, content: icontent });
}
that.delUrlQueryItem = function (iname) {
$.each(that.queryitems, function(idx, it) {
if (it.name==iname)
that.queryitems.splice(idx,1);
});
}
that.toString = function () {
var rs = this.name;
if (this.queryitems.length > 0) {
rs += "?";
for (var itemnr in this.queryitems) {
if (itemnr > 0) rs += "&";
rs += this.queryitems[itemnr].name + "=" + this.queryitems[itemnr].content;
}
}
return rs;
}
return that;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////
// An RGB Color helper class
//////////////////////////////////////////////////////////////////////////////////////////////////////
DQX.colourFromString = function(str) {
var matches = str.match(/\((.*?)\)/);
var nums
if (matches) {
nums = matches[1].split(',');
} else {
nums = [0.5, 0.5, 0.5];
DQX.reportError('Badly formatted colour:'+str)
}
nums = $.map(nums, function(val) {
return parseFloat(val);
}
);
console.log(nums)
if (nums.length == 3)
return DQX.Color(nums[0]/255, nums[1]/255, nums[2]/255);
if (nums.length == 4)
return DQX.Color(nums[0]/255, nums[1]/255, nums[2]/255, nums[3]/255);
DQX.reportError('Badly formatted colour:'+str);
return DQX.Color(0.5, 0.5, 0.5)
};
DQX.Color = function (r, g, b, a) {
var that = {};
that.r = (typeof r == 'undefined') ? 0 : r;
that.g = (typeof g == 'undefined') ? 0 : g;
that.b = (typeof b == 'undefined') ? 0 : b;
that.a = (typeof a == 'undefined') ? 1 : a;
that.f = 1.0;
that.getR = function () { return this.r / this.f; }
that.getG = function () { return this.g / this.f; }
that.getB = function () { return this.b / this.f; }
that.getA = function () { return this.a / this.f; }
that.toString = function () {
if (this.a > 0.999)
return 'rgb(' + Math.round(this.getR() * 255) + ',' + Math.round(this.getG() * 255) + ',' + Math.round(this.getB() * 255) + ')';
else
return 'rgb(' + this.getR().toFixed(3) + ',' + this.getG().toFixed(3) + ',' + this.getB().toFixed(3) + ',' + this.getA().toFixed(3) + ')';
}
that.toStringCanvas = function () {
if (this.a > 0.999)
return 'rgb(' + Math.round(this.getR() * 255) + ',' + Math.round(this.getG() * 255) + ',' + Math.round(this.getB() * 255) + ')';
else
return 'rgba(' + Math.round(this.getR() * 255) + ',' + Math.round(this.getG() * 255) + ',' + Math.round(this.getB() * 255) + ',' + this.getA().toFixed(3) + ')';
}
that.toStringHEX = function () {
return (Math.round(this.getR() * 255)).toString(16) + (Math.round(this.getG() * 255)).toString(16) + (Math.round(this.getB() * 255)).toString(16);
}
that.isBlack = function() {
return (that.r<1.0e-9) && (that.g<1.0e-9) && (that.b<1.0e-9);
}
//Returns a darkened version of the color, amount between 0 and 1
that.darken = function (amount) {
var fc = 1.0 - amount;
return DQX.Color(fc * this.r, fc * this.g, fc * this.b, this.a);
}
//Returns a lightened version of the color, amount between 0 and 1
that.lighten = function (amount) {
var fc = amount;
return DQX.Color((1 - fc) * this.r + fc, (1 - fc) * this.g + fc, (1 - fc) * this.b + fc, this.a);
}
that.changeOpacity = function (opacity) {
return DQX.Color(this.getR(), this.getG(), this.getB(), opacity);
}
return that;
}
DQX.HSL2Color = function(h,s,l) {
var r, g, b;
if(s == 0){
r = g = b = l; // achromatic
}else{
function hue2rgb(p, q, t){
if(t < 0) t += 1;
if(t > 1) t -= 1;
if(t < 1/6) return p + (q - p) * 6 * t;
if(t < 1/2) return q;
if(t < 2/3) return p + (q - p) * (2/3 - t) * 6;
return p;
}
var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
var p = 2 * l - q;
r = hue2rgb(p, q, h + 1/3);
g = hue2rgb(p, q, h);
b = hue2rgb(p, q, h - 1/3);
}
return DQX.Color(r,g,b);
}
//converts a html color string to a DQX.Color
DQX.parseColorString = function (colorstring, faildefault) {
try {
var parts = colorstring.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
if ((parts) && (parts.length >= 2) && (parts[1].length > 0) && (parts[2].length > 0) && (parts[3].length > 0))
return DQX.Color(parseFloat(parts[1]) / 255.0, parseFloat(parts[2]) / 255.0, parseFloat(parts[3]) / 255.0);
if (typeof faildefault != 'undefined')
return faildefault;
return DQX.Color(0,0,0);
}
catch(err)
{
DQX.reportError('Invalid color string: '+colorstring)
}
}
DQX.niceColours = [
"#204a87",
"#a40000",
"#d3d7cf",
"#5c3566",
"#ce5c00",
"#4e9a06",
"#e9b96e",
"#c4a000",
"#729fcf",
"#2e3436"
];
DQX.standardColors = [
DQX.Color(0.2,0.2,1.0),
DQX.Color(1.0,0.3,0.3),
DQX.Color(0.2,0.6,0.7),
DQX.Color(0.9,0.5,0.0),
DQX.Color(0.0,0.8,0.0),
DQX.Color(0.8,0.2,0.8),
DQX.Color(0,0,0.7),
DQX.Color(0.7,0,0),
DQX.Color(0,0.5,0),
DQX.Color(0.5,0,0.5),
DQX.Color(0.3,0.4,0.5),
DQX.Color(0.5,0.5,0.8),
DQX.Color(0.8,0.5,0.5),
DQX.Color(0.7,0.6,0.4),
DQX.Color(0.4,0.7,0.4),
DQX.Color(0.3,0.3,0.5),
DQX.Color(0.5,0.3,0.3),
DQX.Color(0.5,0.4,0.2),
DQX.Color(0.2,0.4,0.2),
DQX.Color(0.5,0.3,0.5),
DQX.Color(0.3,0.5,0.5),
DQX.Color(0.6,0.6,0.7),
DQX.Color(0.7,0.6,0.6),
DQX.Color(0.7,0.7,0.5),
DQX.Color(0.7,0.5,0.7),
DQX.Color(0.5,0.7,0.7),
DQX.Color(0.5,0.6,0.5),
DQX.Color(0.6,0.6,0.6)
];
DQX.PersistentAssociator = function(itemCount) {
var that={};
that.itemCount = itemCount;
that.associations = {};
that.map = function(idlist) {
var freeItemMap = {};
for (var i=0; i<that.itemCount; i++) freeItemMap[i]=1;
$.each(idlist, function(idx, id) {
if (idx<that.itemCount) {
if (id in that.associations)
delete freeItemMap[id];
}
});
var freeItems=[];
for (var i=0; i<that.itemCount; i++) {
if (freeItemMap[i]==1)
freeItems.push(i);
};
var freenr = 0;
var usedItemMap = {};
$.each(idlist, function(idx, id) {
if (idx<that.itemCount) {
var missing = false;
if (!(id in that.associations))
missing = true;
else {
if (that.associations[id] in usedItemMap)
missing = true;
}
if (missing) {
that.associations[id] = freeItems[freenr];
freenr++;
}
usedItemMap[that.associations[id]] = 1;
}
});
that.mapped = true;
};
that.getAssociations = function() {
return that.associations;
}
that.get = function(id) {
if (!(id in that.associations))
return -1;
else
return that.associations[id];
};
return that;
};
//////////////////////////////////////////////////////////////////////////////////////////////////////
// A class that shows visual scroll up / down hints on a scrollable div (makes it easier to see what is scrollable on an iPad)
// scrollableElement: a jQuery-style element rendered in the DOM, representing a scrollable div
//////////////////////////////////////////////////////////////////////////////////////////////////////
DQX.scrollHelper = function (scrollableElement) {
var that = {};
if (DQX.scrollBarWidth > 2) {//don't need in this case
that.update = function () { };
return that;
}
var htmlContent = '';
var scrollUpIndicator = DocEl.Div();
scrollUpIndicator.setCssClass("ScrollUpIndicator");
scrollUpIndicator.addStyle("position", "absolute");
scrollUpIndicator.addStyle("left", "0px");
scrollUpIndicator.addStyle("top", "0px");
scrollUpIndicator.addStyle("opacity", "0.4");
scrollUpIndicator.addStyle("pointer-events", "none");
scrollUpIndicator.addElem('<img src="' + DQX.BMP("scrollup3.png") + '" />');
htmlContent += scrollUpIndicator.toString();
var scrollDownIndicator = DocEl.Div();
scrollDownIndicator.setCssClass("ScrollDownIndicator");
scrollDownIndicator.addStyle("position", "absolute");
scrollDownIndicator.addStyle("left", "0px");
scrollDownIndicator.addStyle("bottom", "1px");
scrollDownIndicator.addStyle("opacity", "0.4");
scrollDownIndicator.addStyle("pointer-events", "none");
scrollDownIndicator.addElem('<img src="' + DQX.BMP("scrolldown3.png") + '" />');
htmlContent += scrollDownIndicator.toString();
$(scrollableElement).parent().append(htmlContent);
that._adjustScrollFeedback = function () {
var scrollOffset = $(scrollableElement).scrollTop();
if (scrollOffset > 0)
$(scrollableElement).parent().find('.ScrollUpIndicator').show();
else
$(scrollableElement).parent().find('.ScrollUpIndicator').hide();
var hh = $(scrollableElement)[0].scrollHeight;
var hh2 = $(scrollableElement).height();
if (hh - scrollOffset > hh2)
$(scrollableElement).parent().find('.ScrollDownIndicator').show();
else
$(scrollableElement).parent().find('.ScrollDownIndicator').hide();
}
that.update = function () {
if (DQX.scrollBarWidth > 2) return; //don't need in this case
that._adjustScrollFeedback();
var scrollElementPos = $(scrollableElement).position();
var scrollElementWidth = $(scrollableElement).width();
var scrollElementHeight = $(scrollableElement).height();
$(scrollableElement).parent().find('.ScrollUpIndicator').css("top", (scrollElementPos.top) + "px");
$(scrollableElement).parent().find('.ScrollDownIndicator').css("top", (scrollElementPos.top + scrollElementHeight - 16) + "px");
$(scrollableElement).parent().find('.ScrollUpIndicator').css("left", (scrollElementPos.left + scrollElementWidth / 2 - 20) + "px");
$(scrollableElement).parent().find('.ScrollDownIndicator').css("left", (scrollElementPos.left + scrollElementWidth / 2 - 20) + "px");
}
$(scrollableElement).scroll(that._adjustScrollFeedback);
that.update();
return that;
};
//////////////////////////////////////////////////////////////////////////////////////////////////////
// Some helper functions that assist in finding back an object instance using a unique ID
//////////////////////////////////////////////////////////////////////////////////////////////////////
DQX.ObjectMapper = {}
DQX.ObjectMapper.Objects = [];
DQX.ObjectMapper._idx = 0;
DQX.ObjectMapper.Add = function (obj) {
DQX.ObjectMapper.Objects[DQX.ObjectMapper._idx] = obj;
obj._MapIdx = DQX.ObjectMapper._idx;
DQX.ObjectMapper._idx++;
}
DQX.ObjectMapper.get = function (idx) {
return DQX.ObjectMapper.Objects[idx];
}
//Use this function to generate a html-compatible function call string that calls a function in an object instance
DQX.ObjectMapper.CreateCallBackFunctionString = function (obj, functionname, arg) {
if (!('_MapIdx' in obj))
DQX.reportError("Object was not added to DQX.ObjectMapper");
var rs = "DQX.ObjectMapper.get(" + obj._MapIdx + ")." + functionname + "(" + arg.toString() + ")";
return rs;
}
///////////////////////////////////////////////////////////////////
// Measures the width of a scroll bar, takeb from http://www.alexandre-gomes.com/?p=115
function getScrollBarWidth() {
var inner = document.createElement('p');
inner.style.width = "100%";
inner.style.height = "200px";
var outer = document.createElement('div');
outer.style.position = "absolute";
outer.style.top = "0px";
outer.style.left = "0px";
outer.style.visibility = "hidden";
outer.style.width = "200px";
outer.style.height = "150px";
outer.style.overflow = "hidden";
outer.appendChild(inner);
document.body.appendChild(outer);
var w1 = inner.offsetWidth;
outer.style.overflow = 'scroll';
var w2 = inner.offsetWidth;
if (w1 == w2) w2 = outer.clientWidth;
document.body.removeChild(outer);
return (w1 - w2);
};
/////////////////////////////////////////////////////////////////////////////////////
// Aguments a class that handles a html element so that it listens to touch & gesture events
/////////////////////////////////////////////////////////////////////////////////////
DQX.augmentTouchEvents = function (that, elemID, handleDrag, handleScale) {
var _touchMoving = false;
var getSingleTouchInfo = function (ev) {
if (!ev.touches) DQX.reportError('No touch event');
if (ev.touches.length < 1) DQX.reportError('Invalid touch event');
var touchInfo = ev.touches[0];
var rs = {
elemX: touchInfo.pageX - $('#' + elemID).offset().left,
elemY: touchInfo.pageY - $('#' + elemID).offset().top,
pageX: touchInfo.pageX,
pageY: touchInfo.pageY
};
rs.x = rs.elemX;
rs.y = rs.elemY;
return rs;
}
var _onTouchStart = function (ev) {
if (ev.touches.length == 1) {
_touchMoving = true;
var touchInfo = getSingleTouchInfo(ev);
if (ev.stopPropagation)
ev.stopPropagation();
if (ev.preventDefault)
ev.preventDefault();
if (that.handleTouchStart)
that.handleTouchStart(touchInfo, ev);
that.touchPositionMoved = false;
that.touchStartElemX = touchInfo.elemX;
that.touchStartElemY = touchInfo.elemY;
that.touchInfoStart = touchInfo;
}
}
var _onTouchMove = function (ev) {
if ((ev.touches.length == 1) && (_touchMoving)) {
var touchInfo = getSingleTouchInfo(ev);
if (ev.stopPropagation)
ev.stopPropagation();
if (ev.preventDefault)
ev.preventDefault();
if (Math.abs(touchInfo.elemX - that.touchStartElemX) + Math.abs(touchInfo.elemY - that.touchStartElemY) > 10) {
that.touchPositionMoved = true;
if (that.handleTouchMove)
that.handleTouchMove(touchInfo, ev);
}
}
}
var _onTouchEnd = function (ev) {
if (_touchMoving) {
_touchMoving = false;
if (ev.stopPropagation)
ev.stopPropagation();
if (ev.preventDefault)
ev.preventDefault();
if (that.handleTouchEnd)
that.handleTouchEnd(ev);
if (!that.touchPositionMoved) {
if (that.handleTouchClick)
that.handleTouchClick(that.touchInfoStart, ev);
}
}
}
var _onTouchCancel = function (ev) {
if (_touchMoving) {
_touchMoving = false;
if (that.handleTouchEnd)
that.handleTouchEnd();
}
}
var _onGestureStart = function (ev) {
if (ev.preventDefault)
ev.preventDefault();