Support scrolling by dragging scrollbars

1 files changed, 8 insertions, 0 deletions

diff --git a/src/widget/scrollbar.c b/src/widget/scrollbar.c
new file mode 100644
index 0000000..9cece5d
--- /dev/null
+++ b/src/widget/scrollbar.c
@@ -0,0 +1,8 @@
+#include "widget.h"
+
+int ScrollbarScroll(uiScrollbar* scrollbar, int y) {
+  assert(scrollbar);
+  scrollbar->handle_y =
+      Max(0, Min(scrollbar->height - scrollbar->handle_height, y));
+  return scrollbar->handle_y;
+}