demo: add lv_demo_scroll

2023-07-15 23:24:58 +02:00
parent 6d2d8a7583
commit b78d4dc04b
7 changed files with 172 additions and 5 deletions
--- a/demos/scroll/lv_demo_scroll.c
+++ b/demos/scroll/lv_demo_scroll.c
@@ -0,0 +1,113 @@
+/**
+ * @file lv_demo_scroll.c
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lv_demo_scroll.h"
+
+#if LV_USE_DEMO_SCROLL
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+static lv_obj_t * switch_create(lv_obj_t * parent, const char * title, lv_obj_flag_t flag, bool en);
+static void generic_swicth_event_cb(lv_event_t * e);
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+static lv_obj_t * list;
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+void lv_demo_scroll(void)
+{
+    lv_obj_t * panel = lv_obj_create(lv_scr_act());
+    lv_obj_set_style_shadow_width(panel, 16, 0);
+    lv_obj_set_style_shadow_ofs_y(panel, 8, 0);
+    lv_obj_set_style_shadow_ofs_x(panel, 4, 0);
+    lv_obj_set_style_shadow_opa(panel, LV_OPA_40, 0);
+
+    lv_obj_set_size(panel, lv_pct(70), lv_pct(90));
+    lv_obj_center(panel);
+    lv_obj_set_flex_flow(panel, LV_FLEX_FLOW_COLUMN);
+    lv_obj_set_flex_align(panel, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
+
+    list = lv_list_create(panel);
+    lv_list_add_btn(list, LV_SYMBOL_IMAGE, "Image1.png");
+    lv_list_add_btn(list, LV_SYMBOL_IMAGE, "Image2.png");
+    lv_list_add_btn(list, LV_SYMBOL_IMAGE, "Image3.png");
+    lv_list_add_btn(list, LV_SYMBOL_IMAGE, "Image4.png");
+    lv_list_add_btn(list, LV_SYMBOL_IMAGE, "Image5.png");
+    lv_list_add_btn(list, LV_SYMBOL_IMAGE, "Image6.png");
+    lv_list_add_btn(list, LV_SYMBOL_IMAGE, "Image7.png");
+    lv_list_add_btn(list, LV_SYMBOL_IMAGE, "Image8.png");
+    lv_list_add_btn(list, LV_SYMBOL_IMAGE, "Image9.png");
+    lv_list_add_btn(list, LV_SYMBOL_IMAGE, "Image10.png");
+
+    switch_create(panel, "Scrollable", LV_OBJ_FLAG_SCROLLABLE, true);
+    switch_create(panel, "Scroll chain", LV_OBJ_FLAG_SCROLL_CHAIN, true);
+    switch_create(panel, "Elastic scroll", LV_OBJ_FLAG_SCROLL_ELASTIC, true);
+    switch_create(panel, "Add scroll momentum", LV_OBJ_FLAG_SCROLL_MOMENTUM, true);
+
+
+    /*Show the switches first*/
+    lv_obj_move_foreground(list);
+
+}
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+
+static lv_obj_t * switch_create(lv_obj_t * parent, const char * title, lv_obj_flag_t flag, bool en)
+{
+    lv_obj_t * cont = lv_obj_create(parent);
+    lv_obj_remove_style_all(cont);
+    lv_obj_set_size(cont, lv_pct(100), LV_SIZE_CONTENT);
+    lv_obj_set_flex_flow(cont, LV_FLEX_FLOW_ROW);
+    lv_obj_set_flex_align(cont, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_START);
+
+    lv_obj_t * label = lv_label_create(cont);
+    lv_label_set_text(label, title);
+    lv_obj_set_flex_grow(label, 1);
+
+    lv_obj_t * sw = lv_switch_create(cont);
+    lv_obj_add_event(sw, generic_swicth_event_cb, LV_EVENT_VALUE_CHANGED, (void *)((lv_uintptr_t) flag));
+    if(en) {
+        lv_obj_add_state(sw, LV_STATE_CHECKED);
+        lv_obj_add_flag(list, flag);
+    }
+    else {
+        lv_obj_clear_state(sw, LV_STATE_CHECKED);
+        lv_obj_clear_flag(list, flag);
+    }
+
+    return cont;
+}
+
+static void generic_swicth_event_cb(lv_event_t * e)
+{
+    lv_obj_t * sw = lv_event_get_target(e);
+    lv_obj_flag_t flag = (lv_obj_flag_t)((lv_uintptr_t)lv_event_get_user_data(e));
+
+    if(lv_obj_has_state(sw, LV_STATE_CHECKED)) lv_obj_add_flag(list, flag);
+    else lv_obj_clear_flag(list, flag);
+}
+
+#endif