draw only inside current scope

include/tim.h

@@ -179,10 +179,10 @@ typedef struct TimScrollItem {
 
 typedef struct TimScrollState {
     TimScrollItem* items;
-    u32 len;
-    u32 cur;
+    i32 len;
+    i32 cur;
     bool draw_border;
-    bool show_scroll_bar_horizontal;
+    bool show_scroll_bar_vertical;
     bool use_mouse_wheel;
 } TimScrollState;
 
@@ -264,6 +264,15 @@ i32 tim_enter_scope(i32 x, i32 y, i32 w, i32 h);
 // exit scope and pop stack
 i32 tim_exit_scope(void);
 
+static inline bool tim_rect_does_fit(TimRect r){
+    return (
+        r.x >= 0 && r.y >= 0 &&
+        r.w >= 0 && r.h >= 0 &&
+        r.x + r.w <= tim->w &&
+        r.y + r.h <= tim->h
+    );
+}
+
 #pragma endregion