Support scrolling by dragging scrollbars

1 files changed, 40 insertions, 18 deletions

diff --git a/src/widget/table.c b/src/widget/table.c
index 76a0413..e7d412e 100644
--- a/src/widget/table.c
+++ b/src/widget/table.c
@@ -1,20 +1,7 @@
 #include "widget.h"
 
-const uiCell* GetCell(const uiTable* table, int row, int col) {
-  assert(table);
-  return &table->cells[row][col];
-}
-
-uiCell* GetCellMut(uiTable* table, int row, int col) {
-  assert(table);
-  return (uiCell*)GetCell(table, row, col);
-}
-
-uiCell** GetLastRow(uiTable* table) {
-  assert(table);
-  assert(table->rows > 0);
-  return &table->cells[table->rows - 1];
-}
+#define Min(a, b) ((a) < (b) ? (a) : (b))
+#define Max(a, b) ((a) > (b) ? (a) : (b))
 
 uiTable* uiMakeTable(int rows, int cols, const char** header) {
   uiTable* table = UI_NEW(uiTable);
@@ -73,7 +60,7 @@ void uiTableAddRow(uiTable* table, const char** row) {
   ASSERT(cells);
   table->cells = cells;
 
-  uiCell** pLastRow = GetLastRow(table);
+  uiCell** pLastRow = TableGetLastRow(table);
   *pLastRow         = calloc(table->cols, sizeof(uiCell));
   ASSERT(*pLastRow);
   uiCell* lastRow = *pLastRow;
@@ -86,10 +73,45 @@ void uiTableAddRow(uiTable* table, const char** row) {
 void uiTableSet(uiTable* table, int row, int col, const char* text) {
   assert(table);
   assert(text);
-  GetCellMut(table, row, col)->text = string_new(text);
+  TableGetCellMut(table, row, col)->text = string_new(text);
 }
 
 const char* uiTableGet(const uiTable* table, int row, int col) {
   assert(table);
-  return string_data(GetCell(table, row, col)->text);
+  return string_data(TableGetCell(table, row, col)->text);
+}
+
+void uiTableScroll(uiTable* table, int row) {
+  assert(table);
+  table->offset = Min(table->rows - table->num_visible_rows, Max(0, row));
+  SyncScrollbarToTable(table);
+}
+
+void SyncScrollbarToTable(uiTable* table) {
+  assert(table);
+  ScrollbarScroll(
+      &table->scrollbar, (int)((double)table->offset / (double)table->rows *
+                               (double)table->height));
+}
+
+void SyncTableToScrollbar(uiTable* table) {
+  assert(table);
+  table->offset = (int)((double)table->scrollbar.handle_y /
+                        (double)table->height * (double)table->rows);
+}
+
+const uiCell* TableGetCell(const uiTable* table, int row, int col) {
+  assert(table);
+  return &table->cells[row][col];
+}
+
+uiCell* TableGetCellMut(uiTable* table, int row, int col) {
+  assert(table);
+  return (uiCell*)TableGetCell(table, row, col);
+}
+
+uiCell** TableGetLastRow(uiTable* table) {
+  assert(table);
+  assert(table->rows > 0);
+  return &table->cells[table->rows - 1];
 }