140 lines
3.4 KiB
JavaScript
140 lines
3.4 KiB
JavaScript
/**************************************
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{
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x:0, y:0, width:433,
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min:1, max:25, step:1,
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message: "rules/turns"
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}
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**************************************/
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function Slider(config){
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var self = this;
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self.id = config.id;
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// Create DOM
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var dom = document.createElement("div");
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dom.className = "slider";
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dom.style.left = config.x+"px";
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dom.style.top = config.y+"px";
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dom.style.width = config.width+"px";
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self.dom = dom;
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// Background
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var bg = document.createElement("div");
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bg.className = "slider_bg";
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dom.appendChild(bg);
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// Knob
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var knob = document.createElement("div");
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knob.className = "slider_knob";
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dom.appendChild(knob);
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// Set value
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self.value = 0;
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var _paramToValue = function(param){
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var value = config.min + (config.max-config.min)*param;
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value = Math.round(value/config.step)*config.step;
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return value;
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};
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var _valueToParam = function(value){
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var param = (value-config.min)/(config.max-config.min); // to (0-1)
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return param;
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};
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self.setParam = function(param){
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// Bounds
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var value = config.min + (config.max-config.min)*param;
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value = Math.round(value/config.step)*config.step;
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self.value = value;
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// DOM
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knob.style.left = self.value*config.width-15;
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};
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self.setValue = function(value){
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// Set
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self.value = value;
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// DOM with param
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var param = _valueToParam(self.value);
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knob.style.left = param*(config.width-30);
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};
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if(config.message) listen(self, config.message, self.setValue);
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// Mouse events
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var _isDragging = false;
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var _offsetX = 0;
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var _mouseToParam = function(event){
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// Mouse to Param to Value
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var param = (event.clientX - _offsetX - dom.getBoundingClientRect().left - 8)/(config.width-30);
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if(param<0) param=0;
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if(param>1) param=1;
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var value = _paramToValue(param);
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// Publish these changes! (only if ACTUALLY changed)
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if(self.value != value){
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if(config.message) publish(config.message, [value]);
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if(config.onchange) config.onchange(value);
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}
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};
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var _onDomMouseDown = function(event){
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if(config.onselect) config.onselect();
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_mouseToParam(event);
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_isDragging = true;
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_offsetX = 0;
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};
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var _onKnobMouseDown = function(event){
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_isDragging = true;
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if(config.onselect) config.onselect();
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_offsetX = event.clientX - knob.getBoundingClientRect().left;
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};
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var _onWindowMouseMove = function(event){
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if(_isDragging) _mouseToParam(event);
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};
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var _onWindowMouseUp = function(){
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_isDragging = false;
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};
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dom.addEventListener("mousedown",_onDomMouseDown,false);
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knob.addEventListener("mousedown",_onKnobMouseDown,false);
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window.addEventListener("mousemove",_onWindowMouseMove,false);
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window.addEventListener("mouseup",_onWindowMouseUp,false);
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// FOR TOUCH
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var _fakeEventWrapper = function(event){
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var fake = {};
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fake.clientX = event.changedTouches[0].clientX;
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fake.clientY = event.changedTouches[0].clientY;
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return fake;
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};
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dom.addEventListener("touchstart",function(event){
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event = _fakeEventWrapper(event);
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_onDomMouseDown(event);
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},false);
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knob.addEventListener("touchstart",function(event){
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event = _fakeEventWrapper(event);
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_onKnobMouseDown(event);
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},false);
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window.addEventListener("touchmove",function(event){
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event = _fakeEventWrapper(event);
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_onWindowMouseMove(event);
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},false);
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window.addEventListener("touchend",_onWindowMouseUp,false);
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////////////////////////////////////////
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// Add...
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self.add = function(){
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_add(self);
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};
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// Remove...
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self.remove = function(){
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unlisten(self);
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_remove(self);
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};
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}
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