dat.gui/gui.js
George Michael Brower 86f5579cbe Changes to index.html
2011-01-25 18:55:59 -07:00

164 lines
3.5 KiB
JavaScript

var GUI = new function() {
var _this = this;
var controllers = [];
this.add = function() {
// We need to call GUI.start() before .add()
if (!started) {
error("Make sure to call GUI.start() in the window.onload function");
return;
}
var object = arguments[0];
var propertyName = arguments[1];
// Have we already added this?
if (alreadyControlled(object, propertyName)) {
error("Controller for \"" + propertyName+"\" already added.");
return;
}
var value = object[propertyName];
// Does this value exist? Is it accessible?
if (value == undefined) {
error(object + " either has no property \""+propertyName+"\", or the property is inaccessible.");
return;
}
var type = typeof value;
var handler = addHandlers[type];
// Do we know how to deal with this data type?
if (handler == undefined) {
error("Cannot create controller for data type \""+type+"\"");
return;
}
var controllerObject = handler.apply(this, arguments);
// Were we able to make the controller?
if (!controllerObject) {
error("Error creating controller for \""+propertyName+"\".");
return;
}
// Success.
controllerContainer.appendChild(controllerObject.domElement);
controllers.push(controllerObject);
return controllerObject;
}
var addHandlers = {
"number": function() {
return construct(NumberController, arguments);
},
"string": function() {
return construct(StringController, arguments);
},
"boolean": function() {
return construct(BooleanController, arguments);
},
"function": function() {
return construct(FunctionController, arguments);
},
};
var alreadyControlled = function(object, propertyName) {
for (var i in controllers) {
if (controllers[i].object == object &&
controllers[i].propertyName == propertyName) {
return true;
}
}
return false;
};
var error = function(str) {
if (typeof console.log == 'function') {
console.error("[GUI ERROR] " + str);
}
};
var construct = function(constructor, args) {
function F() {
return constructor.apply(this, args);
}
F.prototype = constructor.prototype;
return new F();
};
// GUI ... GUI
this.domElement = null;
var controllerContainer;
var started = false;
var open = false;
// TODO: obtain this dynamically?
var domElementMarginTop = 300;
this.start = function() {
this.domElement = document.createElement('div');
this.domElement.setAttribute('id', 'guidat');
controllerContainer = document.createElement('div');
controllerContainer.setAttribute('id', 'guidat-controllers');
toggleButton = document.createElement('a');
toggleButton.setAttribute('id', 'guidat-toggle');
toggleButton.setAttribute('href', '#');
toggleButton.innerHTML = "Show Controls";
toggleButton.addEventListener('click', function(e) {
_this.toggle();
e.preventDefault();
}, false);
this.domElement.appendChild(controllerContainer);
this.domElement.appendChild(toggleButton);
this.domElement.style.marginTop = -domElementMarginTop+"px";
document.body.appendChild(this.domElement);
started = true;
};
this.toggle = function() {
if (open) {
this.hide();
} else {
this.show();
}
};
this.show = function() {
this.domElement.style.marginTop = 0+"px";
toggleButton.innerHTML = "Hide Controls";
open = true;
}
this.hide = function() {
this.domElement.style.marginTop = -domElementMarginTop+"px";
toggleButton.innerHTML = "Show Controls";
open = false;
}
};