init Files

libraries/lvgl/examples/widgets/textarea/lv_example_textarea_3.c

@@ -0,0 +1,41 @@
+#include "../../lv_examples.h"
+#if LV_USE_TEXTAREA && LV_USE_KEYBOARD && LV_BUILD_EXAMPLES
+
+static void ta_event_cb(lv_event_t * e);
+
+static lv_obj_t * kb;
+
+/**
+ * Automatically format text like a clock. E.g. "12:34"
+ * Add the ':' automatically.
+ */
+void lv_example_textarea_3(void)
+{
+    /*Create the text area*/
+    lv_obj_t * ta = lv_textarea_create(lv_screen_active());
+    lv_obj_add_event_cb(ta, ta_event_cb, LV_EVENT_VALUE_CHANGED, NULL);
+    lv_textarea_set_accepted_chars(ta, "0123456789:");
+    lv_textarea_set_max_length(ta, 5);
+    lv_textarea_set_one_line(ta, true);
+    lv_textarea_set_text(ta, "");
+
+    /*Create a keyboard*/
+    kb = lv_keyboard_create(lv_screen_active());
+    lv_obj_set_size(kb,  LV_HOR_RES, LV_VER_RES / 2);
+    lv_keyboard_set_mode(kb, LV_KEYBOARD_MODE_NUMBER);
+    lv_keyboard_set_textarea(kb, ta);
+}
+
+static void ta_event_cb(lv_event_t * e)
+{
+    lv_obj_t * ta = lv_event_get_target(e);
+    const char * txt = lv_textarea_get_text(ta);
+    if(txt[0] >= '0' && txt[0] <= '9' &&
+       txt[1] >= '0' && txt[1] <= '9' &&
+       txt[2] != ':') {
+        lv_textarea_set_cursor_pos(ta, 2);
+        lv_textarea_add_char(ta, ':');
+    }
+}
+
+#endif