Add draw app

internal_filesystem/apps/com.micropythonos.draw/META-INF/MANIFEST.JSON

@@ -0,0 +1,24 @@
+{
+"name": "Draw",
+"publisher": "MicroPythonOS",
+"short_description": "Simple drawing app",
+"long_description": "Draw simple shapes on the screen.",
+"icon_url": "http://demo.lnpiggy.com:2121/apps/com.micropythonos.draw_0.0.1.mpk_icon_64x64.png",
+"download_url": "http://demo.lnpiggy.com:2121/apps/com.micropythonos.draw_0.0.1.mpk",
+"fullname": "com.micropythonos.draw",
+"version": "0.0.1",
+"category": "art",
+"activities": [
+    {
+      "entrypoint": "assets/draw.py",
+      "classname": "Draw",
+      "intent_filters": [
+        {
+          "action": "main",
+          "category": "launcher"
+        }
+      ]
+    }
+  ]
+}
+

internal_filesystem/apps/com.micropythonos.draw/assets/draw.py

@@ -0,0 +1,94 @@
+from mpos.apps import Activity
+import mpos.ui
+
+indev_error_x = 160
+indev_error_y = 120
+
+DARKPINK = lv.color_hex(0xEC048C)
+
+# doesnt work:
+def draw_line(x, y):
+    global canvas
+    # Line drawing like this doesn't work:
+    layer = lv.layer_t()
+    canvas.init_layer(layer)
+    dsc = lv.draw_line_dsc_t()
+    dsc.color = DARKPINK
+    dsc.width = 4
+    dsc.round_end = 1
+    dsc.round_start = 1
+    dsc.p1 = lv.point_precise_t()
+    dsc.p1.x = x
+    dsc.p1.y = y
+    dsc.p2 = lv.point_precise_t()
+    dsc.p2.x = 100
+    dsc.p2.y = 200
+    #layer.draw_line(dsc) doesnt exist!
+    lv.draw_line(layer,dsc) # doesnt do anything!
+    canvas.finish_layer(layer)
+
+
+
+
+class Draw(Activity):
+
+    hor_res = 0
+    ver_res = 0
+
+    # Widgets:
+    canvas = None
+
+    def onCreate(self):
+        screen = lv.obj()
+        self.canvas = lv.canvas(screen)
+        disp = lv.display_get_default()
+        self.hor_res = disp.get_horizontal_resolution()
+        self.ver_res = disp.get_vertical_resolution()
+        self.canvas.set_size(self.hor_res, self.ver_res)
+        self.canvas.set_style_bg_color(lv.color_white(), 0)
+        buffer = bytearray(self.hor_res * self.ver_res * 4)
+        self.canvas.set_buffer(buffer, self.hor_res, self.ver_res, lv.COLOR_FORMAT.NATIVE)
+        self.canvas.fill_bg(lv.color_white(), lv.OPA.COVER)
+        self.canvas.add_flag(lv.obj.FLAG.CLICKABLE)
+        self.canvas.add_event_cb(self.touch_cb, lv.EVENT.ALL, None)
+        self.setContentView(screen)
+
+    def touch_cb(self, event):
+        event_code=event.get_code()
+        # Ignore:
+        # =======
+        # 19: HIT_TEST
+        # COVER_CHECK
+        # DRAW_MAIN
+        # DRAW_MAIN_BEGIN
+        # DRAW_MAIN_END
+        # DRAW_POST
+        # DRAW_POST_BEGIN
+        # DRAW_POST_END
+        # GET_SELF_SIZE
+        if event_code not in [19,23,25,26,27,28,29,30,49]:
+            name = mpos.ui.get_event_name(event_code)
+            #print(f"lv_event_t: code={event_code}, name={name}") # target={event.get_target()}, user_data={event.get_user_data()}, param={event.get_param()}
+            if event_code == lv.EVENT.PRESSING: # this is probably enough
+            #if event_code in [lv.EVENT.PRESSED, lv.EVENT.PRESSING, lv.EVENT.LONG_PRESSED, lv.EVENT.LONG_PRESSED_REPEAT]:
+                x, y = mpos.ui.get_pointer_xy()
+                # drawing a point works:
+                #canvas.set_px(x,y,lv.color_black(),lv.OPA.COVER)
+                #
+                # drawing a square like this works:
+                #for dx in range(-5,5):
+                #    for dy in range(-5,5):
+                #        canvas.set_px(x+dx,y+dy,DARKPINK,lv.OPA.COVER)
+                #
+                # drawing a circle works:
+                radius = 7  # Set desired radius
+                if x == indev_error_x and y == indev_error_y:
+                    radius = 25 # in case of indev error
+                square = radius * radius
+                for dx in range(-radius, radius):
+                    for dy in range(-radius, radius):
+                        if dx * dx + dy * dy <= square:
+                            newx, newy = x + dx, y + dy
+                            if 0 <= newx <= self.hor_res and 0 <= newy <= self.ver_res: # don't draw outside of canvas because that may crash
+                                self.canvas.set_px(x + dx, y + dy, DARKPINK, lv.OPA.COVER)
+