fix(micropython) update examples for new API (#3059)

Related: https://github.com/lvgl/lv_binding_micropython/issues/202

examples/widgets/bar/lv_example_bar_6.py

@@ -31,7 +31,7 @@ def event_cb(e):
     txt_area.y1 = dsc.draw_area.y1 + (dsc.draw_area.get_height() - txt_size.y) // 2
     txt_area.y2 = txt_area.y1 + txt_size.y - 1
 
-    lv.draw_label(txt_area, dsc.clip_area, label_dsc, value_txt, None)
+    dsc.draw_ctx.label(label_dsc, txt_area, value_txt, None)
 
 #
 # Custom drawer on the bar to display the current value

examples/widgets/bar/test.py

@@ -34,7 +34,7 @@ def event_cb(e):
     txt_area.y1 = dsc.draw_area.y1 + (dsc.draw_area.get_height() - txt_size.y) // 2
     txt_area.y2 = txt_area.y1 + txt_size.y - 1
 
-    lv.draw_label(txt_area, dsc.clip_area, label_dsc, value_txt, None)
+    dsc.draw_ctx.label(label_dsc, txt_area, value_txt, None)
 
 #
 # Custom drawer on the bar to display the current value

examples/widgets/btnmatrix/lv_example_btnmatrix_2.py

@@ -21,8 +21,8 @@ img_star_argb = lv.img_dsc_t({
 def event_cb(e):
     code = e.get_code()
     obj = e.get_target()
+    dsc = lv.obj_draw_part_dsc_t.__cast__(e.get_param())
     if code == lv.EVENT.DRAW_PART_BEGIN:
-        dsc = lv.obj_draw_part_dsc_t.__cast__(e.get_param())
         # Change the draw descriptor the 2nd button
         if dsc.id == 1:
             dsc.rect_dsc.radius = 0
@@ -50,8 +50,6 @@ def event_cb(e):
             dsc.label_dsc.opa = lv.OPA.TRANSP  # Hide the text if any
 
     if code == lv.EVENT.DRAW_PART_END:
-        dsc = lv.obj_draw_part_dsc_t.__cast__(e.get_param())
-
         # Add custom content to the 4th button when the button itself was drawn
         if dsc.id == 3:
             # LV_IMG_DECLARE(img_star)
@@ -72,7 +70,7 @@ def event_cb(e):
                 if obj.get_selected_btn() == dsc.id:
                     img_draw_dsc.recolor_opa = lv.OPA._30
 
-                lv.draw_img(a, dsc.clip_area, img_star_argb, img_draw_dsc)
+                dsc.draw_ctx.img(img_draw_dsc, a, img_star_argb)
 
 #
 # Add custom drawer to the button matrix to c

examples/widgets/chart/lv_example_chart_2.py

@@ -35,7 +35,7 @@ def draw_event_cb(e):
     coords = lv.area_t()
     obj.get_coords(coords)
     a.y2 = coords.y2
-    lv.draw_rect(a, dsc.clip_area, draw_rect_dsc)
+    dsc.draw_ctx.rect(draw_rect_dsc, a)
 
     # Remove the masks
     lv.draw_mask_remove_id(line_mask_id)

examples/widgets/chart/lv_example_chart_8.py

@@ -41,7 +41,7 @@ def draw_event_cb(e):
         a.x2 = dsc.p2.x
         a.y1 = min(dsc.p1.y, dsc.p2.y)
         a.y2 = cont_a.y2 - 13 # -13 cuts off where the rectangle draws over the chart margin. Without this an area of 0 doesn't look like 0
-        lv.draw_rect(a, dsc.clip_area, draw_rect_dsc)
+        dsc.draw_ctx.rect(draw_rect_dsc, a)
 
         # Remove the mask
         lv.draw_mask_free_param(line_mask_param)

examples/widgets/slider/lv_example_slider_3.py

@@ -24,7 +24,7 @@ def slider_event_cb(e):
             label_draw_dsc = lv.draw_label_dsc_t()
             label_draw_dsc.init()
 
-            lv.draw_label(label_area, dsc.clip_area, label_draw_dsc, label_text, None)
+            dsc.draw_ctx.label(label_draw_dsc, label_area, label_text, None)
 #
 # Show the current value when the slider if pressed by extending the drawer
 #

examples/widgets/table/lv_example_table_2.py

@@ -25,7 +25,7 @@ def draw_event_cb(e):
         sw_area.x2 = sw_area.x1 + 40
         sw_area.y1 = dsc.draw_area.y1 + dsc.draw_area.get_height() // 2 - 10
         sw_area.y2 = sw_area.y1 + 20
-        lv.draw_rect(sw_area, dsc.clip_area, rect_dsc)
+        dsc.draw_ctx.rect(rect_dsc, sw_area)
          
         rect_dsc.bg_color = lv.color_white()
         
@@ -37,7 +37,7 @@ def draw_event_cb(e):
             sw_area.x2 = sw_area.x1 + 16
         sw_area.y1 += 2
         sw_area.y2 -= 2
-        lv.draw_rect(sw_area, dsc.clip_area, rect_dsc)
+        dsc.draw_ctx.rect(rect_dsc, sw_area)
 
 def change_event_cb(e):
     obj = e.get_target()