add a bunch of buttons to the test application for testing performance

src/main.c

@@ -116,6 +116,29 @@ int app_handle(struct UINode *node, void *data, int event_type, size_t d, void *
                 text_input->text_node = text_node_new(&text_input->node, state->font, UINeutral50, NULL);
             }
 
+            /* a bunch of buttons */
+            {
+                UINode *scroll_container = node_new(node, "buttons_scroll_container");
+                scroll_container->width_policy = UI_SIZE_POLICY_GROW;
+                scroll_container->height_policy = UI_SIZE_POLICY_GROW;
+
+                UIScrollableNode *scroll = scrollable_new(scroll_container, NULL);
+                UINode *buttons = node_new(scroll_container, "buttons");
+                buttons->width_policy = UI_SIZE_POLICY_GROW;
+                buttons->height_policy = UI_SIZE_POLICY_DYNAMIC;
+                scroll->target = buttons;
+
+                box_layout_new(buttons, UI_DIRECTION_VERTICAL);
+
+                for (int i = 0; i < 100; i++) {
+                    UINode *button = node_new(buttons, "button");
+                    state_background_node_new(button, UIPurple600, UIPurple700, UIPurple800, 6.0);
+                    text_node_new(button, state->font, UINeutral50, "button");
+                    dispatcher_new(button, UI_EVENT_UNPRESSED, INCREMENT_COUNT, state, app_handle);
+                    button->width_policy = UI_SIZE_POLICY_GROW;
+                }
+            }
+
             break;
         }
         case SIDEBAR_BEGIN_ANIMATE: {

src/node.c

@@ -48,10 +48,8 @@ UINode *node_by_point(UINode *root, double x, double y)
 {
     for (int i = 0; i < root->nodes_count; i++) {
         UINode *node = root->nodes[i];
-        double local_x = x - node->window_rel_x;
-        double local_y = y - node->window_rel_y;
-        if (ui_rect_contains_point(&node->rect, local_x, local_y) && !(node->flags & UI_NODE_DISABLED)) {
-            return node_by_point(node, local_x, local_y);
+        if (ui_rect_contains_point(&node->rect, x - node->window_rel_x, y - node->window_rel_y) && !(node->flags & UI_NODE_DISABLED)) {
+            return node_by_point(node, x, y);
         }
     }
     return root;

src/scrollable-node.c

@@ -51,13 +51,17 @@ int scrollable_handle(UINode *node, enum UIEvent ev, size_t d, void *p)
             if (target->width_policy == UI_SIZE_POLICY_DYNAMIC) {
                 node_dispatch(target, UI_EVENT_GET_WIDTH, 0, &w);
                 target->rect.w = w;
+            } else if (target->width_policy == UI_SIZE_POLICY_GROW) {
+                target->rect.w = node->parent->rect.w;
             }
             if (target->height_policy == UI_SIZE_POLICY_DYNAMIC) {
                 node_dispatch(target, UI_EVENT_GET_HEIGHT, 0, &h);
                 target->rect.h = h;
+            } else if (target->height_policy == UI_SIZE_POLICY_GROW) {
+                target->rect.h = node->parent->rect.h;
             }
-            target->rect.x = -n->x_scroll;
-            target->rect.y = -n->y_scroll;
+            target->rect.x = n->x_scroll ? -n->x_scroll : 0;
+            target->rect.y = n->y_scroll ? -n->y_scroll : 0;
             node_dispatch(target, UI_EVENT_RELAYOUT, 0, NULL);
             break;
         }