mkxp/extra/js/dpad.js

85 lines
2.9 KiB
JavaScript

function simulateKeyEvent(eventType, keyCode, charCode) {
var e = document.createEventObject ? document.createEventObject() : document.createEvent("Events");
if (e.initEvent) e.initEvent(eventType, true, true);
e.keyCode = keyCode;
e.which = keyCode;
e.charCode = charCode;
// Dispatch directly to Emscripten's html5.h API (use this if page uses emscripten/html5.h event handling):
if (typeof JSEvents !== 'undefined' && JSEvents.eventHandlers && JSEvents.eventHandlers.length > 0) {
for(var i = 0; i < JSEvents.eventHandlers.length; ++i) {
if ((JSEvents.eventHandlers[i].target == Module['canvas'] || JSEvents.eventHandlers[i].target == window)
&& JSEvents.eventHandlers[i].eventTypeString == eventType) {
JSEvents.eventHandlers[i].handlerFunc(e);
}
}
} else {
// Dispatch to browser for real (use this if page uses SDL or something else for event handling):
Module['canvas'].dispatchEvent ? Module['canvas'].dispatchEvent(e) : Module['canvas'].fireEvent("on" + eventType, e);
}
}
// Mappings
const keyMap = {};
const keysDown = {};
/** Add virtual key binding */
function bindKey(elem, key) {
keyMap[elem] = key;
const ne = document.getElementById(elem);
ne.addEventListener('touchstart', function(e) {
e.preventDefault();
simulateKeyEvent('keydown', key);
keysDown[e.target.id] = elem;
});
ne.addEventListener('touchend', function(e) {
e.preventDefault();
if (keysDown[e.target.id] && keyMap[keysDown[e.target.id]]) {
simulateKeyEvent('keyup', keyMap[keysDown[e.target.id]]);
}
keysDown[e.target.id] = 0;
});
ne.addEventListener('touchmove', function(event) {
const myLocation = event.changedTouches[0];
const realTarget = document.elementFromPoint(myLocation.clientX, myLocation.clientY).id;
const origTarget = keysDown[myLocation.target.id];
if (origTarget !== realTarget) {
if (origTarget) {
simulateKeyEvent('keyup', keyMap[origTarget]);
keysDown[myLocation.target.id] = 0;
}
if (keyMap[realTarget]) {
simulateKeyEvent('keydown', keyMap[realTarget]);
keysDown[myLocation.target.id] = realTarget;
}
}
});
}
function is_touch_device() {
try {
document.createEvent("TouchEvent");
return true;
} catch (e) {
return false;
}
}
const resize = function() {
const el = document.getElementById('canvas');
if (window.innerHeight > window.innerWidth) {
el.style.height = 'unset';
el.style.width = '100%';
} else {
el.style.width = 'unset';
el.style.height = '100%';
}
}
window.addEventListener('resize', resize);
window.addEventListener('load', resize);