Fixes #25

app/src/main/java/gui/menu/SudokuView.java

@@ -7,9 +7,11 @@ import imgui.ImGui;
 import imgui.ImGuiStyle;
 import sudoku.io.SudokuSerializer;
 import sudoku.solver.BacktrackingSolver;
+import sudoku.solver.HintHelper;
 import sudoku.solver.HumanSolver;
 import sudoku.solver.MixedSolver;
 import sudoku.solver.Solver;
+import sudoku.solver.HintHelper.Hint;
 import sudoku.structure.MultiDoku;
 
 public class SudokuView extends BaseView {
@@ -68,6 +70,16 @@ public class SudokuView extends BaseView {
 			stopResolve();
 	}
 
+	private void renderHintButton() {
+		if (!this.resolved && centeredButton("Indice")) {
+			Hint hint = HintHelper.getHint(this.doku, new BacktrackingSolver());
+			assert (hint != null);
+			hint.cell().setSymbolIndex(hint.newValue());
+			if (this.doku.isSolved())
+				this.sudokuRenderer.onResolve.emit();
+		}
+	}
+
 	private void startSolve(Solver solver) {
 		resolveThread = new Thread(() -> {
 			try {
@@ -102,7 +114,6 @@ public class SudokuView extends BaseView {
 			ImGui.beginDisabled();
 
 		if (!this.resolved && centeredButton("Résoudre")) {
-			// beginSolve = true;
 			ImGui.openPopup("solve");
 		}
 
@@ -131,6 +142,7 @@ public class SudokuView extends BaseView {
 	@Override
 	public void render() {
 		sudokuRenderer.render();
+		renderHintButton();
 		renderSolveButton();
 		renderSaveButton();
 		renderCancelButton();