doc: renamed project

pico-sensor/McuLib/LittlevGL/lvgl/src/widgets/lv_line.c

@@ -0,0 +1,201 @@
+/**
+ * @file lv_line.c
+ *
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lv_line.h"
+
+#if LV_USE_LINE != 0
+#include "../misc/lv_assert.h"
+#include "../draw/lv_draw.h"
+#include "../misc/lv_math.h"
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+/*********************
+ *      DEFINES
+ *********************/
+#define MY_CLASS &lv_line_class
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+static void lv_line_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
+static void lv_line_event(const lv_obj_class_t * class_p, lv_event_t * e);
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+const lv_obj_class_t lv_line_class = {
+    .constructor_cb = lv_line_constructor,
+    .event_cb = lv_line_event,
+    .width_def = LV_SIZE_CONTENT,
+    .height_def = LV_SIZE_CONTENT,
+    .instance_size = sizeof(lv_line_t),
+    .base_class = &lv_obj_class
+};
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+lv_obj_t * lv_line_create(lv_obj_t * parent)
+{
+    LV_LOG_INFO("begin");
+    lv_obj_t * obj = lv_obj_class_create_obj(MY_CLASS, parent);
+    lv_obj_class_init_obj(obj);
+    return obj;
+}
+
+/*=====================
+ * Setter functions
+ *====================*/
+
+void lv_line_set_points(lv_obj_t * obj, const lv_point_t points[], uint16_t point_num)
+{
+    LV_ASSERT_OBJ(obj, MY_CLASS);
+
+    lv_line_t * line = (lv_line_t *)obj;
+    line->point_array    = points;
+    line->point_num      = point_num;
+
+    lv_obj_refresh_self_size(obj);
+
+    lv_obj_invalidate(obj);
+}
+
+void lv_line_set_y_invert(lv_obj_t * obj, bool en)
+{
+    LV_ASSERT_OBJ(obj, MY_CLASS);
+
+    lv_line_t * line = (lv_line_t *)obj;
+    if(line->y_inv == en) return;
+
+    line->y_inv = en ? 1U : 0U;
+
+    lv_obj_invalidate(obj);
+}
+
+/*=====================
+ * Getter functions
+ *====================*/
+
+bool lv_line_get_y_invert(const lv_obj_t * obj)
+{
+    LV_ASSERT_OBJ(obj, MY_CLASS);
+
+    lv_line_t * line = (lv_line_t *)obj;
+
+    return line->y_inv == 1U;
+}
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+
+static void lv_line_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
+{
+    LV_UNUSED(class_p);
+    LV_TRACE_OBJ_CREATE("begin");
+
+    lv_line_t * line = (lv_line_t *)obj;
+
+    line->point_num   = 0;
+    line->point_array = NULL;
+    line->y_inv       = 0;
+
+    lv_obj_clear_flag(obj, LV_OBJ_FLAG_CLICKABLE);
+
+    LV_TRACE_OBJ_CREATE("finished");
+}
+
+static void lv_line_event(const lv_obj_class_t * class_p, lv_event_t * e)
+{
+    LV_UNUSED(class_p);
+
+    lv_res_t res;
+
+    /*Call the ancestor's event handler*/
+    res = lv_obj_event_base(MY_CLASS, e);
+    if(res != LV_RES_OK) return;
+
+    lv_event_code_t code = lv_event_get_code(e);
+    lv_obj_t * obj = lv_event_get_target(e);
+
+    if(code == LV_EVENT_REFR_EXT_DRAW_SIZE) {
+        /*The corner of the skew lines is out of the intended area*/
+        lv_coord_t line_width = lv_obj_get_style_line_width(obj, LV_PART_MAIN);
+        lv_coord_t * s = lv_event_get_param(e);
+        if(*s < line_width) *s = line_width;
+    }
+    else if(code == LV_EVENT_GET_SELF_SIZE) {
+        lv_line_t * line = (lv_line_t *)obj;
+
+        if(line->point_num == 0 || line->point_array == NULL) return;
+
+        lv_point_t * p = lv_event_get_param(e);
+        lv_coord_t w = 0;
+        lv_coord_t h = 0;
+
+        uint16_t i;
+        for(i = 0; i < line->point_num; i++) {
+            w = LV_MAX(line->point_array[i].x, w);
+            h = LV_MAX(line->point_array[i].y, h);
+        }
+
+        lv_coord_t line_width = lv_obj_get_style_line_width(obj, LV_PART_MAIN);
+        w += line_width;
+        h += line_width;
+        p->x = w;
+        p->y = h;
+    }
+    else if(code == LV_EVENT_DRAW_MAIN) {
+        lv_line_t * line = (lv_line_t *)obj;
+        lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
+
+        if(line->point_num == 0 || line->point_array == NULL) return;
+
+        lv_area_t area;
+        lv_obj_get_coords(obj, &area);
+        lv_coord_t x_ofs = area.x1 - lv_obj_get_scroll_x(obj);
+        lv_coord_t y_ofs = area.y1 - lv_obj_get_scroll_y(obj);
+        lv_coord_t h = lv_obj_get_height(obj);
+
+        lv_draw_line_dsc_t line_dsc;
+        lv_draw_line_dsc_init(&line_dsc);
+        lv_obj_init_draw_line_dsc(obj, LV_PART_MAIN, &line_dsc);
+
+        /*Read all points and draw the lines*/
+        uint16_t i;
+        for(i = 0; i < line->point_num - 1; i++) {
+            lv_point_t p1;
+            lv_point_t p2;
+            p1.x = line->point_array[i].x + x_ofs;
+            p2.x = line->point_array[i + 1].x + x_ofs;
+
+            if(line->y_inv == 0) {
+                p1.y = line->point_array[i].y + y_ofs;
+                p2.y = line->point_array[i + 1].y + y_ofs;
+            }
+            else {
+                p1.y = h - line->point_array[i].y + y_ofs;
+                p2.y = h - line->point_array[i + 1].y + y_ofs;
+            }
+            lv_draw_line(draw_ctx, &line_dsc, &p1, &p2);
+            line_dsc.round_start = 0;   /*Draw the rounding only on the end points after the first line*/
+        }
+    }
+}
+#endif