init Files

libraries/lvgl/examples/scroll/lv_example_scroll_2.c

@@ -0,0 +1,57 @@
+#include "../lv_examples.h"
+#if LV_BUILD_EXAMPLES && LV_USE_FLEX
+
+static void sw_event_cb(lv_event_t * e)
+{
+    lv_event_code_t code = lv_event_get_code(e);
+    lv_obj_t * sw = lv_event_get_target(e);
+
+    if(code == LV_EVENT_VALUE_CHANGED) {
+        lv_obj_t * list = lv_event_get_user_data(e);
+
+        if(lv_obj_has_state(sw, LV_STATE_CHECKED)) lv_obj_add_flag(list, LV_OBJ_FLAG_SCROLL_ONE);
+        else lv_obj_remove_flag(list, LV_OBJ_FLAG_SCROLL_ONE);
+    }
+}
+
+/**
+ * Show an example to scroll snap
+ */
+void lv_example_scroll_2(void)
+{
+    lv_obj_t * panel = lv_obj_create(lv_screen_active());
+    lv_obj_set_size(panel, 280, 120);
+    lv_obj_set_scroll_snap_x(panel, LV_SCROLL_SNAP_CENTER);
+    lv_obj_set_flex_flow(panel, LV_FLEX_FLOW_ROW);
+    lv_obj_align(panel, LV_ALIGN_CENTER, 0, 20);
+
+    uint32_t i;
+    for(i = 0; i < 10; i++) {
+        lv_obj_t * btn = lv_button_create(panel);
+        lv_obj_set_size(btn, 150, lv_pct(100));
+
+        lv_obj_t * label = lv_label_create(btn);
+        if(i == 3) {
+            lv_label_set_text_fmt(label, "Panel %"LV_PRIu32"\nno snap", i);
+            lv_obj_remove_flag(btn, LV_OBJ_FLAG_SNAPPABLE);
+        }
+        else {
+            lv_label_set_text_fmt(label, "Panel %"LV_PRIu32, i);
+        }
+
+        lv_obj_center(label);
+    }
+    lv_obj_update_snap(panel, LV_ANIM_ON);
+
+#if LV_USE_SWITCH
+    /*Switch between "One scroll" and "Normal scroll" mode*/
+    lv_obj_t * sw = lv_switch_create(lv_screen_active());
+    lv_obj_align(sw, LV_ALIGN_TOP_RIGHT, -20, 10);
+    lv_obj_add_event_cb(sw, sw_event_cb, LV_EVENT_ALL, panel);
+    lv_obj_t * label = lv_label_create(lv_screen_active());
+    lv_label_set_text(label, "One scroll");
+    lv_obj_align_to(label, sw, LV_ALIGN_OUT_BOTTOM_MID, 0, 5);
+#endif
+}
+
+#endif