A39模拟器

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

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+C
+^
+
+Simple Checkboxes
+"""""""""""""""""
+
+.. lv_example:: widgets/checkbox/lv_example_checkbox_1
+  :language: c
+
+MicroPython
+^^^^^^^^^^^
+
+No examples yet.

MXC-A39/lvgl/examples/widgets/checkbox/lv_example_checkbox_1.c

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+#include "../../lv_examples.h"
+#if LV_USE_CHECKBOX && LV_BUILD_EXAMPLES
+
+static void event_handler(lv_event_t * e)
+{
+    lv_event_code_t code = lv_event_get_code(e);
+    lv_obj_t * obj = lv_event_get_target(e);
+    if(code == LV_EVENT_VALUE_CHANGED) {
+        const char * txt = lv_checkbox_get_text(obj);
+        const char * state = lv_obj_get_state(obj) & LV_STATE_CHECKED ? "Checked" : "Unchecked";
+        LV_LOG_USER("%s: %s", txt, state);
+    }
+}
+
+void lv_example_checkbox_1(void)
+{
+    lv_obj_set_flex_flow(lv_scr_act(), LV_FLEX_FLOW_COLUMN);
+    lv_obj_set_flex_align(lv_scr_act(), LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER);
+
+    lv_obj_t * cb;
+    cb = lv_checkbox_create(lv_scr_act());
+    lv_checkbox_set_text(cb, "Apple");
+    lv_obj_add_event_cb(cb, event_handler, LV_EVENT_ALL, NULL);
+
+    cb = lv_checkbox_create(lv_scr_act());
+    lv_checkbox_set_text(cb, "Banana");
+    lv_obj_add_state(cb, LV_STATE_CHECKED);
+    lv_obj_add_event_cb(cb, event_handler, LV_EVENT_ALL, NULL);
+
+    cb = lv_checkbox_create(lv_scr_act());
+    lv_checkbox_set_text(cb, "Lemon");
+    lv_obj_add_state(cb, LV_STATE_DISABLED);
+    lv_obj_add_event_cb(cb, event_handler, LV_EVENT_ALL, NULL);
+
+    cb = lv_checkbox_create(lv_scr_act());
+    lv_obj_add_state(cb, LV_STATE_CHECKED | LV_STATE_DISABLED);
+    lv_checkbox_set_text(cb, "Melon\nand a new line");
+    lv_obj_add_event_cb(cb, event_handler, LV_EVENT_ALL, NULL);
+
+    lv_obj_update_layout(cb);
+}
+
+#endif

MXC-A39/lvgl/examples/widgets/checkbox/lv_example_checkbox_1.py

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+def event_handler(obj, event):
+    if event == lv.EVENT.VALUE_CHANGED:
+        print("State: %s" % ("Checked" if obj.is_checked() else "Unchecked"))
+
+cb = lv.cb(lv.scr_act())
+cb.set_text("I agree to terms and conditions.")
+cb.align(None, lv.ALIGN.CENTER, 0, 0)
+cb.set_event_cb(event_handler)