commit 758737b73ce2b9892aa0671ef2fc8ddbeb80d6b5
parent fbd33fec6e585551b8aa5183649b68ddcbf825cf
Author: Connor Thomson <connor@gnufault.org>
Date:   Sun, 18 Oct 2026 19:59:01 -0700

Add animations back

Diffstat:
M
include/ta_button.h
 | 
3
+++
M
src/ta_button.c
 | 
47
+++++++++++++++++++++++++++++++++++++++++------

2 files changed, 44 insertions(+), 6 deletions(-)
diff --git a/include/ta_button.h b/include/ta_button.h
@@ -14,6 +14,9 @@ typedef struct {
     ta_button *buttons;
     ta_size size;
     ta_size selected;
+    ta_size animation_from;
+    ta_uint32 animation_frame;
+    ta_bool animation_active;
     ta_bool up_was_down;
     ta_bool down_was_down;
     ta_bool enter_was_down;
diff --git a/src/ta_button.c b/src/ta_button.c
@@ -2,6 +2,7 @@
 #include "ta_button.h"
 #include "ta_text.h"
 
+#define TA_BUTTON_ANIMATION_FRAMES 8
 #define TA_BUTTON_FONT_SIZE        32
 #define TA_BUTTON_SPACING          48
 #define TA_BUTTON_COLOR_IDLE       118
@@ -15,6 +16,9 @@ void ta_button_lists_init(ta_button_lists *list) {
     list->buttons          = 0;
     list->size             = 0;
     list->selected         = 0;
+    list->animation_from   = 0;
+    list->animation_frame  = 0;
+    list->animation_active = ta_false;
     list->up_was_down      = ta_false;
     list->down_was_down    = ta_false;
     list->enter_was_down   = ta_false;
@@ -64,8 +68,23 @@ ta_bool ta_button_lists_update(ta_button_lists *list) {
     list->down_was_down   = down_down;
     list->enter_was_down  = enter_down;
 
+    if (list->animation_active) {
+        list->animation_frame++;
+
+        if (list->animation_frame >= TA_BUTTON_ANIMATION_FRAMES) {
+            list->animation_frame  = TA_BUTTON_ANIMATION_FRAMES;
+            list->animation_active = ta_false;
+        }
+
+        if (enter_pressed && list->buttons[list->selected].callback != 0) {
+            list->buttons[list->selected].callback();
+        }
+
+        return ta_true;
+    }
+
     if (down_pressed || up_pressed) {
-        ta_size previous = list->selected;
+        list->animation_from = list->selected;
 
         if (down_pressed) {
             list->selected = (list->selected + 1) % list->size;
@@ -73,7 +92,11 @@ ta_bool ta_button_lists_update(ta_button_lists *list) {
             list->selected = list->selected == 0 ? list->size - 1 : list->selected - 1;
         }
 
-        moved = list->selected != previous;
+        if (list->selected != list->animation_from) {
+            list->animation_frame  = 0;
+            list->animation_active = ta_true;
+            moved                  = ta_true;
+        }
     }
 
     if (enter_pressed && list->buttons[list->selected].callback != 0) {
@@ -102,7 +125,14 @@ void ta_button_lists_draw(const ta_button_lists *list) {
         spacing = 1;
     }
 
-    ta_int32 center_y = (ta_int32)(ta_fb.height / 2);
+    double progress = 1.0;
+    if (list->animation_active) {
+        progress = (double)list->animation_frame / TA_BUTTON_ANIMATION_FRAMES;
+        progress = progress * progress * (3.0 - 2.0 * progress);
+    }
+
+    ta_int32 center_y       = (ta_int32)(ta_fb.height / 2);
+    ta_int32 selected_shift = (ta_int32)list->selected - (ta_int32)list->animation_from;
    
     for (ta_size i = 0; i < list->size; i++) {
         ta_uint32 text_width  = 0;
@@ -110,14 +140,19 @@ void ta_button_lists_draw(const ta_button_lists *list) {
        
         ta_text_measure(list->buttons[i].label, font_size, &text_width, &text_height);
 
-        ta_int32 row_from = (ta_int32)i - (ta_int32)list->selected;
-        ta_int32 y = center_y + row_from * spacing - (ta_int32)(text_height / 2);
+        ta_int32 row_from = (ta_int32)i - (ta_int32)list->animation_from;
+        ta_int32 y = center_y + (ta_int32)(row_from * spacing - selected_shift * spacing * progress) - (ta_int32)(text_height / 2);
 
         if (y < 0 || (ta_size)y >= ta_fb.height || text_width > ta_fb.width) {
             continue;
         }
 
-        ta_uint8 color = i == list->selected ? TA_BUTTON_COLOR_SELECTED : TA_BUTTON_COLOR_IDLE;
+        double selection = i == list->animation_from ? 1.0 - progress : 0.0;
+        if (i == list->selected) {
+            selection += progress;
+        }
+
+        ta_uint8 color = (ta_uint8)(TA_BUTTON_COLOR_IDLE + (TA_BUTTON_COLOR_SELECTED - TA_BUTTON_COLOR_IDLE) * selection + 0.5);
         ta_uint32 x    = (ta_uint32)(ta_fb.width - text_width) / 2;
 
         ta_text_draw_outline(list->buttons[i].label, x, (ta_uint32)y, text_width, text_height, color, color, color, 1, 0, 0, 0);