/
ui.js
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/
ui.js
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// Phosphor - a browser-based microcomputer
// Copyright (c) 2018 Marc Lepage
'use strict';
function hit(ex, ey, x, y, w, h) {
return x <= ex && ex < x+w && y <= ey && ey < y+h;
}
module.exports = class Ui {
constructor(list, target) {
this.list = list;
for (var i = 0; i < list.length; ++i)
if (list[i].name)
this[list[i].name] = list[i];
if (target) {
target.onCopy = this.onCopy.bind(this);
target.onCut = this.onCut.bind(this);
target.onDraw = this.onDraw.bind(this);
target.onKeyDown = this.onKeyDown.bind(this);
target.onKeyUp = this.onKeyUp.bind(this);
target.onMouseDown = this.onMouseDown.bind(this);
target.onMouseMove = this.onMouseMove.bind(this);
target.onMouseUp = this.onMouseUp.bind(this);
target.onPaste = this.onPaste.bind(this);
target.onWheel = this.onWheel.bind(this);
}
}
onCopy(e) {
const item = this._focus;
if (!item)
return;
const f = item.onCopy;
if (!f)
return;
f.call(item, e);
}
onCut(e) {
const item = this._focus;
if (!item)
return;
const f = item.onCut;
if (!f)
return;
f.call(item, e);
}
onDraw() {
const list = this.list;
for (var i = 0; i < list.length; ++i) {
const item = list[i];
const f = item.onDraw;
if (f)
f.call(item);
}
}
onKeyDown(e) {
const item = this._focus;
if (!item)
return;
const f = item.onKey;
if (!f)
return;
f.call(item, e);
}
// TODO not currently called, is it needed?
onKeyUp(e) {
const item = this._focus;
if (!item)
return;
const f = item.onKeyUp;
if (!f)
return;
f.call(item, e);
}
onMouseDown(e) {
const list = this.list, ex = e.x, ey = e.y;
for (var i = 0; i < list.length; ++i) {
const item = list[i];
const f = item.onMouseDown;
if (!f || !hit(ex, ey, item.x, item.y, item.w, item.h))
continue;
if (!this._mouse)
this._mouse = {};
this._mouse.x = e.x - item.x;
this._mouse.y = e.y - item.y;
f.call(item, this._mouse);
break;
}
}
onMouseMove(e) {
const list = this.list, ex = e.x, ey = e.y;
for (var i = 0; i < list.length; ++i) {
const item = list[i];
const f = item.onMouseMove;
if (!f || !hit(ex, ey, item.x, item.y, item.w, item.h))
continue;
if (!this._mouse)
this._mouse = {};
this._mouse.x = e.x - item.x;
this._mouse.y = e.y - item.y;
f.call(item, this._mouse);
break;
}
}
onMouseUp(e) {
const list = this.list, ex = e.x, ey = e.y;
for (var i = 0; i < list.length; ++i) {
const item = list[i];
const f = item.onMouseUp;
if (!f || !hit(ex, ey, item.x, item.y, item.w, item.h))
continue;
if (!this._mouse)
this._mouse = {};
this._mouse.x = e.x - item.x;
this._mouse.y = e.y - item.y;
f.call(item, this._mouse);
break;
}
}
onPaste(e) {
const item = this._focus;
if (!item)
return;
const f = item.onPaste;
if (!f)
return;
f.call(item, e);
}
onWheel(e) {
const list = this.list, ex = e.x, ey = e.y;
for (var i = 0; i < list.length; ++i) {
const item = list[i];
const f = item.onWheel;
if (!f || !hit(ex, ey, item.x, item.y, item.w, item.h))
continue;
if (!this._wheel)
this._wheel = {};
this._wheel.x = e.x - item.x;
this._wheel.y = e.y - item.y;
this._wheel.deltaX = e.deltaX;
this._wheel.deltaY = e.deltaY;
f.call(item, this._wheel);
break;
}
}
};