examples(micropython): add a few missing MP examples (#3672)

examples/others/gridnav/lv_example_gridnav_1.py

@@ -0,0 +1,63 @@
+#
+# Demonstrate a a basic grid navigation
+#
+# It's assumed that the default group is set and
+# there is a keyboard indev
+
+cont1 = lv.obj(lv.scr_act())
+lv.gridnav_add(cont1, lv.GRIDNAV_CTRL.NONE)
+
+# Use flex here, but works with grid or manually placed objects as well
+cont1.set_flex_flow(lv.FLEX_FLOW.ROW_WRAP)
+cont1.set_style_bg_color(lv.palette_lighten(lv.PALETTE.BLUE, 5), lv.STATE.FOCUSED)
+cont1.set_size(lv.pct(50), lv.pct(100))
+
+# Only the container needs to be in a group
+lv.group_get_default().add_obj(cont1)
+
+label = lv.label(cont1)
+label.set_text("No rollover")
+
+for i in range(10):
+    obj = lv.btn(cont1)
+    obj.set_size(70, lv.SIZE_CONTENT)
+    obj.add_flag(lv.obj.FLAG.CHECKABLE)
+    lv.group_remove_obj(obj)   # Not needed, we use the gridnav instead
+
+    label = lv.label(obj)
+    label.set_text("{:d}".format(i))
+    label.center()
+
+# Create a second container with rollover grid nav mode.
+
+cont2 = lv.obj(lv.scr_act())
+lv.gridnav_add(cont2,lv.GRIDNAV_CTRL.ROLLOVER)
+cont2.set_style_bg_color(lv.palette_lighten(lv.PALETTE.BLUE, 5), lv.STATE.FOCUSED)
+cont2.set_size(lv.pct(50), lv.pct(100))
+cont2.align(lv.ALIGN.RIGHT_MID, 0, 0)
+
+label = lv.label(cont2)
+label.set_width(lv.pct(100))
+label.set_text("Rollover\nUse tab to focus the other container")
+
+# Only the container needs to be in a group
+lv.group_get_default().add_obj(cont2)
+
+# Add and place some children manually
+ta = lv.textarea(cont2)
+ta.set_size(lv.pct(100), 80)
+ta.set_pos(0, 80);
+lv.group_remove_obj(ta)   # Not needed, we use the gridnav instead
+
+cb = lv.checkbox(cont2)
+cb.set_pos(0, 170)
+lv.group_remove_obj(cb)   # Not needed, we use the gridnav instead
+
+sw1 = lv.switch(cont2)
+sw1.set_pos(0, 200);
+lv.group_remove_obj(sw1)  # Not needed, we use the gridnav instead
+
+sw2 = lv.switch(cont2)
+sw2.set_pos(lv.pct(50), 200)
+lv.group_remove_obj(sw2)  # Not needed, we use the gridnav instead
+