element groups: initial support, improves login dialog init

src/ui/widget/group.c

@@ -0,0 +1,69 @@
+#include "group.h"
+#include "button.h"
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+
+group_t *init_group(group_el_t *children) {
+  group_t *group = malloc(sizeof(group_t));
+
+  /* count elements */
+  uint32_t count = 0;
+  for (count = 0; children[count].type != w_end; count++)
+    ;
+  count++; /* TODO: improve counting */
+  group->elements = malloc(sizeof(group_el_t) * count);
+  memcpy(group->elements, children, sizeof(group_el_t) * count);
+
+  /* init child elements */
+  for (int i = 0; group->elements[i].type != w_end; i++) {
+    group_el_t *el = &(group->elements)[i];
+    switch (el->type) {
+    case w_button:
+      el->element = init_button();
+      break;
+    case w_box:
+    case w_group:
+    case w_end:
+      break;
+    }
+  }
+  group->direction = horizontal; /* horizontal by default */
+  return group;
+}
+
+void draw_group(WINDOW *win, group_t *group, uint32_t cur_x, uint32_t cur_y) {
+  group_el_t *children = group->elements;
+  int32_t x_used = 0; /* used space */
+  for (int i = 0; children[i].type != w_end; i++) {
+    group_el_t *el = &children[i];
+    switch (el->type) {
+    case w_button:
+      x_used += draw_button(win, (button_t *)el->element, cur_x + x_used + 1 * i, cur_y);
+      break;
+    case w_box:
+    case w_group:
+    case w_end:
+      break;
+    }
+  }
+}
+
+void destroy_group(group_t *group) {
+  group_el_t *children = group->elements;
+  for (int i = 0; children[i].type != w_end; i++) {
+    group_el_t *el = &children[i];
+    switch (el->type) {
+    case w_button:
+      destroy_button(el->element);
+      break;
+    case w_box:
+    case w_group:
+    case w_end:
+      break;
+    }
+  }
+  free(group->elements);
+  free(group);
+}