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combobox.js-e
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combobox.js-e
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## Copyright (c) 2013, Empirical Modelling Group
## All rights reserved.
##
## See LICENSE.txt
${{
Combobox = function (name, suggestions, x, y, width, placeholder, maxlength, enabled) {
this.name = name;
this.obsName = root.currentObservableName();
this.suggestions = suggestions;
this.x = x;
this.y = y;
this.width = width;
this.placeholder = placeholder;
this.maxlength = maxlength;
this.enabled = enabled;
}
Combobox.prototype.hash = function () {
return this.name+"$$"+
(Array.isArray(this.suggestions)? this.suggestions.join("$$") : "") +
this.x+"$$"+
this.y+"$$"+
this.width+"$$"+
this.placeholder+"$$"+
this.maxlength+"$$"+
this.enabled;
};
}}$;
/**
* Creates a Combobox (drop down selection)
* @param [name] defaults to the observable name
* @param suggestions list of strings to be suggested
* @param x
* @param y
* @param [width]
* @param [placeholder] string to display before choice is made. Defaults to observable name.
* @param [maxlength] Maximum length allowed in input
* @param [enabled] defaults to true.
*
* #canvas #combobox #input #select
*/
func Combobox { ${{
var argsProcessed;
var name;
if (typeof(arguments[0]) == "string") {
name = arguments[0];
argsProcessed = 1;
} else {
name = root.currentObservableName();
argsProcessed = 0;
if (name === undefined) {
eden.error(new Error("Combobox: Every combobox must have a name."), "error");
return undefined;
}
}
var suggestions = arguments[argsProcessed];
argsProcessed++;
var x = arguments[argsProcessed];
argsProcessed++;
var y = arguments[argsProcessed];
argsProcessed++;
var width, placeholder, maxlength;
var arg = arguments[argsProcessed];
var argType = typeof(arg);
if (arg === undefined || argType == "number") {
width = arg;
argsProcessed++;
arg = arguments[argsProcessed];
argType = typeof(arg);
}
if (arg === undefined || argType == "string") {
placeholder = arg;
argsProcessed++;
arg = arguments[argsProcessed];
argType = typeof(arg);
}
if (arg === undefined || argType == "number") {
maxlength = arg;
argsProcessed++;
arg = arguments[argsProcessed];
}
var enabled = arg;
return new Combobox(name, suggestions, x, y, width, placeholder, maxlength, enabled);
}}$; }
${{
Combobox.prototype.makeOptionsHTML = function() {
var html = "";
for (var i = 0; i < this.suggestions.length; i++) {
html = html + '\n<option value="' + this.suggestions[i] + '"/>';
}
return html;
}
Combobox.prototype.draw = function(context) {
var input, suggestions;
var me = this;
var name = this.name;
var valueSym = root.lookup(name + '_value');
if (this.elements === undefined) {
var disabled = this.enabled === false? 'disabled="disabled"' : '';
var placeholder = ' placeholder="' + (this.placeholder === undefined? name : this.placeholder) + '"';
var maxlength = this.maxlength !== undefined? ' maxlength="' + this.maxlength + '"' : '';
var inputJQ = $('<input type="text" list="combobox-' + name + '" ' + disabled +
placeholder + maxlength + ' class="canvashtml-item"/>');
input = inputJQ.get(0);
var suggestionsJQ = $('<datalist id="combobox-' + this.name + '"></datalist>');
suggestions = suggestionsJQ.get(0);
suggestionsJQ.html(this.makeOptionsHTML(this.values));
var initialValue = valueSym.value();
if (initialValue !== undefined) {
input.value = initialValue;
}
valueSym.addJSObserver("updateCombobox", function (symbol, value) {
input.value = value;
});
inputJQ.on("input", function(event) {
valueSym.assign(event.target.value, root.scope, EdenSymbol.hciAgent, true);
})
.on("mousedown", function () {
var mouseFollow = root.lookup("mouseFollow").value();
root.lookup("mouseDownZone").assign(undefined, root.scope, EdenSymbol.hciAgent, mouseFollow);
})
.on("mouseup", function () {
edenUI.plugins.Canvas2D.endClick();
})
.on("mouseenter", function () {
var mouseFollow = root.lookup("mouseFollow").value();
root.lookup("mouseZone").assign(name, root.scope, EdenSymbol.hciAgent, mouseFollow);
});
this.elements = [input, suggestions];
} else {
//Case when the user has performed direct assignment to one or more JavaScript properties.
input = this.elements[0];
suggestions = this.elements[1];
$(suggestions).html(this.makeOptionsHTML());
input.value = valueSym.value();
if (this.enabled === false) {
input.disabled = true;
} else {
input.disabled = false;
}
}
};
Combobox.prototype.scale = function (scale, zoom, origin) {
var style = this.elements[0].style;
style.left = Math.round((this.x + origin.x) * scale) + "px";
style.top = Math.round((this.y + origin.y) * scale) + "px";
if (this.width !== undefined) {
style.width = Math.round(this.width * scale - 6) + "px";
}
style.fontSize = zoom + "em";
};
Combobox.prototype.toString = function() {
if (this.name == this.obsName) {
return "Combobox(" + Eden.edenCodeForValues(this.suggestions, this.x, this.y, this.enabled) + ")";
} else {
return "Combobox(" + Eden.edenCodeForValues(this.name, this.suggestions, this.x, this.y,
this.maxlength, this.enabled) + ")";
}
};
Combobox.prototype.getEdenCode = Combobox.prototype.toString;
}}$;