A39模拟器

MXC-A39/lvgl/examples/widgets/obj/index.rst

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+C
+^
+
+Base objects with custom styles 
+""""""""""""""""""""""""""""""""
+
+.. lv_example:: widgets/obj/lv_example_obj_1
+  :language: c
+  
+Make an object draggable 
+""""""""""""""""""""""""""""
+
+.. lv_example:: widgets/obj/lv_example_obj_2
+  :language: c
+
+MicroPython
+^^^^^^^^^^^
+
+No examples yet.

MXC-A39/lvgl/examples/widgets/obj/lv_example_obj_1.c

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+#include "../../lv_examples.h"
+#if LV_BUILD_EXAMPLES
+
+void lv_example_obj_1(void)
+{
+    lv_obj_t * obj1;
+    obj1 = lv_obj_create(lv_scr_act());
+    lv_obj_set_size(obj1, 100, 50);
+    lv_obj_align(obj1, LV_ALIGN_CENTER, -60, -30);
+
+    static lv_style_t style_shadow;
+    lv_style_init(&style_shadow);
+    lv_style_set_shadow_width(&style_shadow, 10);
+    lv_style_set_shadow_spread(&style_shadow, 5);
+    lv_style_set_shadow_color(&style_shadow, lv_palette_main(LV_PALETTE_BLUE));
+
+    lv_obj_t * obj2;
+    obj2 = lv_obj_create(lv_scr_act());
+    lv_obj_add_style(obj2, &style_shadow, 0);
+    lv_obj_align(obj2, LV_ALIGN_CENTER, 60, 30);
+}
+#endif

MXC-A39/lvgl/examples/widgets/obj/lv_example_obj_1.py

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+obj1 = lv.obj(lv.scr_act())
+obj1.set_size(100, 50)
+obj1.set_style(lv.style_plain_color)
+obj1.align(None, lv.ALIGN.CENTER, -60, -30)
+
+# Copy the previous object and enable drag
+obj2 = lv.obj(lv.scr_act(), obj1)
+obj2.set_style(lv.style_pretty_color)
+obj2.align(None, lv.ALIGN.CENTER, 0, 0)
+obj2.set_drag(True)
+
+style_shadow = lv.style_t()
+lv.style_copy(style_shadow, lv.style_pretty)
+style_shadow.body.shadow.width = 6
+style_shadow.body.radius = 800 # large enough to make it round
+
+# Copy the previous object (drag is already enabled)
+obj3 = lv.obj(lv.scr_act(), obj2)
+obj3.set_style(style_shadow)
+obj3.align(None, lv.ALIGN.CENTER, 60, 30)

MXC-A39/lvgl/examples/widgets/obj/lv_example_obj_2.c

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+#include "../../lv_examples.h"
+#if LV_BUILD_EXAMPLES
+
+static void drag_event_handler(lv_event_t * e)
+{
+    lv_obj_t * obj = lv_event_get_target(e);
+
+    lv_indev_t * indev = lv_indev_get_act();
+    lv_point_t vect;
+    lv_indev_get_vect(indev, &vect);
+
+    lv_coord_t x = lv_obj_get_x(obj) + vect.x;
+    lv_coord_t y = lv_obj_get_y(obj) + vect.y;
+    lv_obj_set_pos(obj, x, y);
+}
+
+
+/**
+ * Make an object dragable.
+ */
+void lv_example_obj_2(void)
+{
+    lv_obj_t * obj;
+    obj = lv_obj_create(lv_scr_act());
+    lv_obj_set_size(obj, 150, 100);
+    lv_obj_add_event_cb(obj, drag_event_handler, LV_EVENT_PRESSING, NULL);
+
+    lv_obj_t * label = lv_label_create(obj);
+    lv_label_set_text(label, "Drag me");
+    lv_obj_center(label);
+
+}
+#endif