Basic table scrollbar rendering.main

1 files changed, 22 insertions, 0 deletions

diff --git a/src/render.c b/src/render.c
index 24490c0..b1fd3e8 100644
--- a/src/render.c
+++ b/src/render.c
@@ -186,6 +186,8 @@ static void RenderTable(const uiTable* table, RenderState* state) {
   uiRect  original_subsurface = {0};
   uiPoint original_pen        = {0};
 
+  int col_widths_sum = 0;
+
   // Render header.
   if (table->header) {
     for (int col = 0; col < table->cols; ++col) {
@@ -201,6 +203,9 @@ static void RenderTable(const uiTable* table, RenderState* state) {
       // Reset the original subsurface and pen for subsequent columns.
       PopSubsurface(state, &original_subsurface, &original_pen);
 
+      // Keep track of the sum of column widths to later render the scroll bar.
+      col_widths_sum += table->widths[col];
+
       // Next column.
       state->pen.x += table->widths[col];
     }
@@ -235,6 +240,23 @@ static void RenderTable(const uiTable* table, RenderState* state) {
     state->pen.y += g_ui.font->header.glyph_height;
   }
   state->pen.y = y0;
+
+  // Render scrollbar.
+  if (table->flags.vertical_overflow) {
+    state->pen.x = col_widths_sum;
+
+    const int y_start = (int)((double)table->offset / (double)table->rows *
+                              (double)table->height);
+
+    const int height = (int)((double)table->num_visible_rows /
+                             (double)table->rows * (double)table->height);
+
+    FillRect(
+        &(uiRect){.y = y_start, .width = ScrollBarWidth, .height = height},
+        uiPink, state);
+
+    state->pen.x = x0;
+  }
 }
 
 /// Render a widget.