Support scrolling by dragging scrollbars

1 files changed, 18 insertions, 3 deletions

diff --git a/src/layout.c b/src/layout.c
index c8f5995..5261eb3 100644
--- a/src/layout.c
+++ b/src/layout.c
@@ -51,7 +51,7 @@ static void ResizeTable(uiTable* table, int width, int height) {
   // Table contents.
   for (int row = 0; row < table->rows; ++row) {
     for (int col = 0; col < table->cols; ++col) {
-      const uiCell* cell   = GetCell(table, row, col);
+      const uiCell* cell   = TableGetCell(table, row, col);
       const int     length = (int)string_length(cell->text);
 
       widths[col] = length > widths[col] ? length : widths[col];
@@ -110,13 +110,28 @@ static void ResizeTable(uiTable* table, int width, int height) {
   }
 
   // Now make room for the scroll bar, if necessary.
+  uiScrollbar* scrollbar = &table->scrollbar;
   if (table->flags.vertical_overflow) {
-    const int offset    = ScrollBarWidth / table->cols;
-    const int remainder = ScrollBarWidth % table->cols;
+    // Subtract room from table columns.
+    const int offset    = ScrollbarWidth / table->cols;
+    const int remainder = ScrollbarWidth % table->cols;
     for (int col = 0; col < table->cols; ++col) {
       table->widths[col] -= offset + (col < remainder ? 1 : 0);
       assert(table->widths[col] >= 0);
     }
+
+    // Set scrollbar layout.
+    scrollbar->width  = ScrollbarWidth;
+    scrollbar->height = table->height;
+    scrollbar->handle_height =
+        (int)((double)table->num_visible_rows / (double)table->rows *
+              (double)table->height);
+    uiTableScroll(table, table->offset);
+  } else { // Scroll bar not visible.
+    scrollbar->width         = 0;
+    scrollbar->height        = 0;
+    scrollbar->handle_height = 0;
+    scrollbar->handle_y      = 0;
   }
 }