Sudoku: added "set all hints" help item.

* Sets all the hints for all the fields.

src/apps/sudoku/SudokuView.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2007-2012, Axel Dörfler, axeld@pinc-software.de.
+ * Copyright 2007-2014, Axel Dörfler, axeld@pinc-software.de.
  * Distributed under the terms of the MIT License.
  */
 
@@ -1101,53 +1101,17 @@ SudokuView::MessageReceived(BMessage* message)
 			Redo();
 			break;
 
-		case kMsgSolveSudoku:
+		case kMsgSetAllHints:
-		{
+			_SetAllHints();
-			SudokuSolver solver;
+			break;
-			solver.SetTo(fField);
+
-			bigtime_t start = system_time();
+		case kMsgSolveSudoku:
-			solver.ComputeSolutions();
+			_Solve();
-			printf("found %" B_PRIu32 " solutions in %g msecs\n",
-				solver.CountSolutions(), (system_time() - start) / 1000.0);
-			if (solver.CountSolutions() > 0) {
-				_PushUndo();
-				fField->SetTo(solver.SolutionAt(0));
-				Invalidate();
-			} else
-				beep();
 			break;
-		}
 
 		case kMsgSolveSingle:
-		{
+			_SolveSingle();
-			if (fField->IsSolved()) {
-				beep();
-				break;
-			}
-
-			SudokuSolver solver;
-			solver.SetTo(fField);
-			bigtime_t start = system_time();
-			solver.ComputeSolutions();
-			printf("found %" B_PRIu32 " solutions in %g msecs\n",
-				solver.CountSolutions(), (system_time() - start) / 1000.0);
-			if (solver.CountSolutions() > 0) {
-				_PushUndo();
-
-				// find free spot
-				uint32 x, y;
-				do {
-					x = rand() % fField->Size();
-					y = rand() % fField->Size();
-				} while (fField->ValueAt(x, y));
-
-				fField->SetValueAt(x, y,
-					solver.SolutionAt(0)->ValueAt(x, y));
-				_InvalidateField(x, y);
-			} else
-				beep();
 			break;
-		}
 
 		default:
 			BView::MessageReceived(message);
@@ -1320,3 +1284,70 @@ SudokuView::Draw(BRect /*updateRect*/)
 }
 
 
+void
+SudokuView::_SetAllHints()
+{
+	uint32 size = fField->Size();
+
+	for (uint32 y = 0; y < size; y++) {
+		for (uint32 x = 0; x < size; x++) {
+			uint32 validMask = fField->ValidMaskAt(x, y);
+			fField->SetHintMaskAt(x, y, validMask);
+		}
+	}
+	Invalidate();
+}
+
+
+void
+SudokuView::_Solve()
+{
+	SudokuSolver solver;
+	if (_GetSolutions(solver)) {
+		_PushUndo();
+		fField->SetTo(solver.SolutionAt(0));
+		Invalidate();
+	} else
+		beep();
+}
+
+
+void
+SudokuView::_SolveSingle()
+{
+	if (fField->IsSolved()) {
+		beep();
+		return;
+	}
+
+	SudokuSolver solver;
+	if (_GetSolutions(solver)) {
+		_PushUndo();
+
+		// find free spot
+		uint32 x, y;
+		do {
+			x = rand() % fField->Size();
+			y = rand() % fField->Size();
+		} while (fField->ValueAt(x, y));
+
+		fField->SetValueAt(x, y,
+			solver.SolutionAt(0)->ValueAt(x, y));
+		_InvalidateField(x, y);
+	} else
+		beep();
+}
+
+
+bool
+SudokuView::_GetSolutions(SudokuSolver& solver)
+{
+	solver.SetTo(fField);
+	bigtime_t start = system_time();
+	solver.ComputeSolutions();
+
+	printf("found %" B_PRIu32 " solutions in %g msecs\n",
+		solver.CountSolutions(), (system_time() - start) / 1000.0);
+
+	return solver.CountSolutions() > 0;
+}

src/apps/sudoku/SudokuView.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2007-2012, Axel Dörfler, axeld@pinc-software.de.
+ * Copyright 2007-2014, Axel Dörfler, axeld@pinc-software.de.
  * Distributed under the terms of the MIT License.
  */
 #ifndef SUDOKU_VIEW_H
@@ -12,6 +12,7 @@
 
 class BDataIO;
 class SudokuField;
+class SudokuSolver;
 struct entry_ref;
 
 
@@ -113,6 +114,10 @@ private:
 			void				_UndoRedo(BObjectList<BMessage>& undos,
 									BObjectList<BMessage>& redos);
 			void				_PushUndo();
+			void				_SetAllHints();
+			void				_Solve();
+			void				_SolveSingle();
+			bool				_GetSolutions(SudokuSolver& solver);
 
 private:
 			rgb_color			fBackgroundColor;
@@ -146,6 +151,7 @@ private:
 static const uint32 kMsgSudokuSolved = 'susl';
 static const uint32 kMsgSolveSudoku = 'slvs';
 static const uint32 kMsgSolveSingle = 'slsg';
+static const uint32 kMsgSetAllHints = 'salh';
 
 // you can observe these:
 static const int32 kUndoRedoChanged = 'unre';

src/apps/sudoku/SudokuWindow.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2007-2011, Axel Dörfler, axeld@pinc-software.de.
+ * Copyright 2007-2014, Axel Dörfler, axeld@pinc-software.de.
  * Distributed under the terms of the MIT License.
  */
 
@@ -276,6 +276,10 @@ SudokuWindow::SudokuWindow()
 	fRestoreStateItem->SetEnabled(fStoredState != NULL);
 	menu->AddSeparatorItem();
 
+	menu->AddItem(new BMenuItem(B_TRANSLATE("Set all hints"),
+		new BMessage(kMsgSetAllHints)));
+	menu->AddSeparatorItem();
+
 	menu->AddItem(new BMenuItem(B_TRANSLATE("Solve"),
 		new BMessage(kMsgSolveSudoku)));
 	menu->AddItem(new BMenuItem(B_TRANSLATE("Solve single field"),