openOutpaint/js/input.js

297 lines
8.7 KiB
JavaScript
Raw Normal View History

const inputConfig = {
clickRadius: 10, // Radius to be considered a click (pixels). If farther, turns into a drag
clickTiming: 500, // Timing window to be considered a click (ms). If longer, turns into a drag
dClickTiming: 500, // Timing window to be considered a double click (ms).
};
/**
* Mouse input processing
*/
// Base object generator functions
function _context_coords() {
return {
dragging: {
left: null,
middle: null,
right: null,
},
prev: {
x: 0,
y: 0,
},
pos: {
x: 0,
y: 0,
},
};
}
function _mouse_observers() {
return {
// Simple click handlers
onclick: new Observer(),
// Double click handlers (will still trigger simple click handler as well)
ondclick: new Observer(),
// Drag handler
ondragstart: new Observer(),
ondrag: new Observer(),
ondragend: new Observer(),
// Paint handler (like drag handler, but with no delay); will trigger during clicks too
onpaintstart: new Observer(),
onpaint: new Observer(),
onpaintend: new Observer(),
};
}
function _context_observers() {
return {
onmousemove: new Observer(),
left: _mouse_observers(),
middle: _mouse_observers(),
right: _mouse_observers(),
};
}
const mouse = {
buttons: {
right: null,
left: null,
middle: null,
},
// Mouse Actions in Window Coordinates
window: _context_coords(),
// Mouse Actions in Canvas Coordinates
canvas: _context_coords(),
// Mouse Actions in World Coordinates
world: _context_coords(),
listen: {
window: _context_observers(),
canvas: _context_observers(),
world: _context_observers(),
},
};
function _mouse_state_snapshot() {
return {
buttons: window.structuredClone(mouse.buttons),
window: window.structuredClone(mouse.window),
canvas: window.structuredClone(mouse.canvas),
world: window.structuredClone(mouse.world),
};
}
const _double_click_timeout = {};
const _drag_start_timeout = {};
window.onmousedown = (evn) => {
const time = new Date();
// Processes for a named button
const onhold = (key) => () => {
if (_double_click_timeout[key]) {
// ondclick event
['window', 'canvas', 'world'].forEach((ctx) =>
mouse.listen[ctx][key].ondclick.emit({
buttonId: evn.button,
x: mouse[ctx].pos.x,
y: mouse[ctx].pos.y,
timestamp: new Date(),
})
);
} else {
// Start timer
_double_click_timeout[key] = setTimeout(
() => delete _double_click_timeout[key],
inputConfig.dClickTiming
);
}
// Set drag start timeout
_drag_start_timeout[key] = setTimeout(() => {
['window', 'canvas', 'world'].forEach((ctx) => {
mouse.listen[ctx][key].ondragstart.emit({
buttonId: evn.button,
x: mouse[ctx].pos.x,
y: mouse[ctx].pos.y,
timestamp: new Date(),
});
if (mouse[ctx].dragging[key])
mouse[ctx].dragging[key].drag = true;
delete _drag_start_timeout[key];
});
}, inputConfig.clickTiming);
['window', 'canvas', 'world'].forEach((ctx) => {
mouse.buttons[key] = time;
mouse[ctx].dragging[key] = {};
Object.assign(mouse[ctx].dragging[key], mouse[ctx].pos);
// onpaintstart event
mouse.listen[ctx][key].onpaintstart.emit({
buttonId: evn.button,
x: mouse[ctx].pos.x,
y: mouse[ctx].pos.y,
timestamp: new Date(),
});
});
};
// Runs the correct handler
const buttons = [onhold('left'), onhold('middle'), onhold('right')];
buttons[evn.button] && buttons[evn.button]();
};
window.onmouseup = (evn) => {
const time = new Date();
// Processes for a named button
const onrelease = (key) => () => {
['window', 'canvas', 'world'].forEach((ctx) => {
const start = {
x: mouse[ctx].dragging[key].x,
y: mouse[ctx].dragging[key].y,
};
// onclick event
const dx = mouse[ctx].pos.x - start.x;
const dy = mouse[ctx].pos.y - start.y;
if (
time.getTime() - mouse.buttons[key].getTime() <
inputConfig.clickTiming &&
dx * dx + dy * dy <
inputConfig.clickRadius * inputConfig.clickRadius
)
mouse.listen[ctx][key].onclick.emit({
buttonId: evn.button,
x: mouse[ctx].pos.x,
y: mouse[ctx].pos.y,
timestamp: new Date(),
});
// onpaintend event
mouse.listen[ctx][key].onpaintend.emit({
buttonId: evn.button,
x: mouse[ctx].pos.x,
y: mouse[ctx].pos.y,
timestamp: new Date(),
});
// ondragend event
if (mouse[ctx].dragging[key].drag)
mouse.listen[ctx][key].ondragend.emit({
buttonId: evn.button,
x: mouse[ctx].pos.x,
y: mouse[ctx].pos.y,
timestamp: new Date(),
});
mouse[ctx].dragging[key] = null;
});
if (_drag_start_timeout[key] !== undefined) {
clearTimeout(_drag_start_timeout[key]);
delete _drag_start_timeout[key];
}
mouse.buttons[key] = null;
};
// Runs the correct handler
const buttons = [
onrelease('left'),
onrelease('middle'),
onrelease('right'),
];
buttons[evn.button] && buttons[evn.button]();
};
window.onmousemove = (evn) => {
// Set Window Coordinates
Object.assign(mouse.window.prev, mouse.window.pos);
mouse.window.pos = { x: evn.clientX, y: evn.clientY };
// Set Canvas Coordinates (using overlay canvas as reference)
if (evn.target.id === 'overlayCanvas') {
Object.assign(mouse.canvas.prev, mouse.canvas.pos);
mouse.canvas.pos = { x: evn.layerX, y: evn.layerY };
}
// Set World Coordinates (For now the same as canvas coords; Will be useful with infinite canvas)
if (evn.target.id === 'overlayCanvas') {
Object.assign(mouse.world.prev, mouse.world.pos);
mouse.world.pos = { x: evn.layerX, y: evn.layerY };
}
['window', 'canvas', 'world'].forEach((ctx) => {
mouse.listen[ctx].onmousemove.emit({
px: mouse[ctx].prev.x,
py: mouse[ctx].prev.y,
x: mouse[ctx].pos.x,
y: mouse[ctx].pos.y,
timestamp: new Date(),
});
['left', 'middle', 'right'].forEach((key) => {
// ondrag event
if (mouse[ctx].dragging[key] && mouse[ctx].dragging[key].drag)
mouse.listen[ctx][key].ondrag.emit({
px: mouse[ctx].prev.x,
py: mouse[ctx].prev.y,
x: mouse[ctx].pos.x,
y: mouse[ctx].pos.y,
timestamp: new Date(),
});
// onpaint event
if (mouse[ctx].dragging[key])
mouse.listen[ctx][key].onpaint.emit({
px: mouse[ctx].prev.x,
py: mouse[ctx].prev.y,
x: mouse[ctx].pos.x,
y: mouse[ctx].pos.y,
timestamp: new Date(),
});
});
});
};
/** MOUSE DEBUG */
/*
mouse.listen.window.right.onclick.on(() =>
console.debug('mouse.listen.window.right.onclick')
);
mouse.listen.window.right.ondclick.on(() =>
console.debug('mouse.listen.window.right.ondclick')
);
mouse.listen.window.right.ondragstart.on(() =>
console.debug('mouse.listen.window.right.ondragstart')
);
mouse.listen.window.right.ondrag.on(() =>
console.debug('mouse.listen.window.right.ondrag')
);
mouse.listen.window.right.ondragend.on(() =>
console.debug('mouse.listen.window.right.ondragend')
);
mouse.listen.window.right.onpaintstart.on(() =>
console.debug('mouse.listen.window.right.onpaintstart')
);
mouse.listen.window.right.onpaint.on(() =>
console.debug('mouse.listen.window.right.onpaint')
);
mouse.listen.window.right.onpaintend.on(() =>
console.debug('mouse.listen.window.right.onpaintend')
);
*/
/**
* Mouse input processing
*/