A39模拟器

MXC-A39/lv_user_code/app/test.c

@@ -0,0 +1,44 @@
+#include "lv_examples.h"
+#if LV_BUILD_EXAMPLES && LV_USE_FLEX
+
+static void event_cb(lv_event_t * e)
+{
+    /*The original target of the event. Can be the buttons or the container*/
+    lv_obj_t * target = lv_event_get_target(e);
+
+    /*The current target is always the container as the event is added to it*/
+    lv_obj_t * cont = lv_event_get_current_target(e);
+
+    /*If container was clicked do nothing*/
+    if(target == cont) return;
+
+    /*Make the clicked buttons red*/
+    lv_obj_set_style_bg_color(target, lv_palette_main(LV_PALETTE_RED), 0);
+}
+
+/**
+ * Demonstrate event bubbling
+ */
+void lv_example_event_3(void)
+{
+
+    lv_obj_t * cont = lv_obj_create(lv_scr_act());
+    lv_obj_set_size(cont, 290, 200);
+    lv_obj_center(cont);
+    lv_obj_set_flex_flow(cont, LV_FLEX_FLOW_ROW_WRAP);
+
+    uint32_t i;
+    for(i = 0; i < 30; i++) {
+        lv_obj_t * btn = lv_btn_create(cont);
+        lv_obj_set_size(btn, 80, 50);
+        lv_obj_add_flag(btn, LV_OBJ_FLAG_EVENT_BUBBLE);
+
+        lv_obj_t * label = lv_label_create(btn);
+        lv_label_set_text_fmt(label, "%d", i);
+        lv_obj_center(label);
+    }
+
+    lv_obj_add_event_cb(cont, event_cb, LV_EVENT_CLICKED, NULL);
+}
+
+#endif