From 06519e700926d5a68980a70a6c016f391ae1ef31 Mon Sep 17 00:00:00 2001
From: Petr Kracik <petrkr@petrkr.net>
Date: Fri, 5 Jun 2020 15:04:27 +0200
Subject: [PATCH] HID Mouse: absolute mouse support

---
 hidinput.py          | 35 +++++++++++++++++++++++++++++++++--
 templates/mouse.html | 36 +++++++++++++++++++++++++++++++++---
 2 files changed, 66 insertions(+), 5 deletions(-)

diff --git a/hidinput.py b/hidinput.py
index d3aab59..16046f1 100644
--- a/hidinput.py
+++ b/hidinput.py
@@ -17,12 +17,14 @@ app = Flask(__name__)
 
 hiddev = None
 hidmouse = None
+hidmouseabs = None
 
 
 def hid_init():
-    global hiddev, hidmouse
+    global hiddev, hidmouse, hidmouseabs
     hiddev = open('/dev/hidg0', 'rb+')
     hidmouse = open('/dev/hidg1', 'rb+')
+    hidmouseabs = open('/dev/hidg2', 'rb+')
 
 
 def hid_write(data):
@@ -47,6 +49,20 @@ def hid_mouse_write(btn, x, y, wheel):
     hidmouse.flush()
 
 
+def hid_mouse_writeabs(btn, x, y, wheel):
+    if hidmouseabs is None:
+        return False
+
+    data = bytearray(6)
+    data[0] = btn
+    data[1:3] = x.to_bytes(2, byteorder='little')
+    data[3:5] = y.to_bytes(2, byteorder='little')
+    data[5] = wheel
+
+    hidmouseabs.write(data)
+    hidmouseabs.flush()
+
+
 def send_key(hidkey, shift, alt, ctlr, mod):
     data = bytearray(8)
     if shift:
@@ -91,7 +107,6 @@ def index():
 def mouseindex():
     return render_template("mouse.html")
 
-
 @app.route("/hid/mouse", methods=["POST"])
 def mouse():
     mouseevent = json.loads(request.data)
@@ -111,6 +126,22 @@ def mouse():
 
     return Response("", mimetype="text/plain")
 
+@app.route("/hid/mouseabs", methods=["POST"])
+def mouseabs():
+    mouseevent = json.loads(request.data)
+    print(mouseevent)
+
+    btn = mouseevent['btn']
+    x = mouseevent['x']
+    y = mouseevent['y']
+    wheel = mouseevent['wheel']
+
+    print("X: {}, Y: {}".format(x, y))
+
+    hid_mouse_writeabs(btn, x, y, wheel)
+
+    return Response("", mimetype="text/plain")
+
 
 @app.route("/hid/keyboard", methods=["POST"])
 def keypress():
diff --git a/templates/mouse.html b/templates/mouse.html
index e3b91d4..4e0bec2 100644
--- a/templates/mouse.html
+++ b/templates/mouse.html
@@ -18,9 +18,37 @@
 <input type="button" onclick="sendMouse(0, 0, 10);" value="v" /><br />
 <input type="button" onclick="sendMouse(1, 0, 0);" value="LEFT" />
 <input type="button" onclick="sendMouse(2, 0, 0);" value="RIGHT" />
-
 <script>
 
+var btn=0;
+var posX=0;
+var posY=0;
+
+$(document).ready(function(){
+
+	$("canvas").mousedown(function(event){
+		btn=event.buttons;
+		handleMouse();
+	});
+	$("canvas").mouseup(function(event){
+		btn=event.buttons;
+		handleMouse();
+	});
+
+	  $("canvas").mousemove(function(event){
+//		  sendMouse(0, event.originalEvent.movementX, event.originalEvent.movementY);
+		  posX=event.offsetX;
+		  posY=event.offsetY;
+		  handleMouse();
+	  });
+
+});
+
+function handleMouse() {
+	$("span").text(btn +", "+ posX + ", " + posY);
+	sendMouse(btn, posX, posY);
+}
+
 function sendMouse(btn, x, y) {
   var obj = {
     x: x,
@@ -31,7 +59,7 @@ function sendMouse(btn, x, y) {
 
   var ret = $.ajax({
       type: "POST",
-      url: "hid/mouse",
+      url: "hid/mouseabs",
       data: JSON.stringify(obj),
       contentType: "application/json; charset=utf-8",
       dataType: "json"
@@ -40,6 +68,8 @@ function sendMouse(btn, x, y) {
 };
 
 </script>
- 
+<span></span><br/><br/>
+<canvas width=500 height=500 style="border: 1px solid black" oncontextmenu="return false"></canvas>
+<!--<img src="placeholder.png" width=1920 height=1080 onmousemove='console.log("aaa");' />-->
 </body>
 </html>