84 lines
2.4 KiB
JavaScript
84 lines
2.4 KiB
JavaScript
var last_mouse_update = Date.now()
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var socket = io();
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function mkbhandler_load()
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{
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const streamview = document.getElementById('streamview');
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streamview.addEventListener("mouseenter", enable_listener);
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streamview.addEventListener("mouseleave", disable_listener);
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}
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function keydown_handler(event)
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{
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socket.emit('key_down', event.code);
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event.preventDefault();
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event.stopPropagation();
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}
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function keyup_handler(event)
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{
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socket.emit('key_up', event.code);
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event.preventDefault();
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event.stopPropagation();
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}
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function mousemove_handler(event)
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{
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// limit the mouse update rate to 60fps (approximately) because serial bandwidth limits be low
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if (Date.now() - last_mouse_update >= 16)
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{
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last_mouse_update = Date.now();
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const bounds = streamview.getBoundingClientRect();
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const x = event.clientX - bounds.left;
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const y = event.clientY - bounds.top;
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const x_scale_factor = 32768 / streamview.clientWidth;
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const y_scale_factor = 32768 / streamview.clientHeight;
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const scaled_x = x * x_scale_factor;
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const scaled_y = y * y_scale_factor
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socket.emit("mouse_move", [scaled_x, scaled_y]);
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}
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}
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function mousedown_handler(event)
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{
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socket.emit('mouse_down', event.button);
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event.preventDefault();
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event.stopPropagation();
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}
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function mouseup_handler(event)
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{
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socket.emit('mouse_up', event.button);
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event.preventDefault();
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event.stopPropagation();
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}
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function prevent_right_click(event)
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{
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event.preventDefault();
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}
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function enable_listener()
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{
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document.addEventListener("keydown", keydown_handler);
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document.addEventListener("keyup", keyup_handler);
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document.addEventListener("mousemove", mousemove_handler);
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document.addEventListener("mousedown", mousedown_handler);
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document.addEventListener("mouseup", mouseup_handler);
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document.addEventListener('contextmenu', prevent_right_click);
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}
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function disable_listener()
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{
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document.removeEventListener("keydown", keydown_handler);
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document.removeEventListener("keyup", keyup_handler);
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document.removeEventListener("mousemove", mousemove_handler);
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document.removeEventListener("mousedown", mousedown_handler);
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document.removeEventListener("mouseup", mouseup_handler);
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document.removeEventListener('contextmenu', prevent_right_click);
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}
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window.addEventListener("load", mkbhandler_load);
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