disable castling buttons

app/src/main/java/chess/view/DDDrender/DDDView.java

@@ -203,13 +203,18 @@ public class DDDView extends GameAdapter implements CommandSender {
     }
 
     private void onFooterRender() {
+        CastlingResult allowedCastlings = getAllowedCastlings();
+        ImGui.beginDisabled(allowedCastlings == CastlingResult.None || allowedCastlings == CastlingResult.Big);
         if (ImGui.button("Roque")) {
             sendCastling();
         }
+        ImGui.endDisabled();
         ImGui.sameLine();
+        ImGui.beginDisabled(allowedCastlings == CastlingResult.None || allowedCastlings == CastlingResult.Small);
         if (ImGui.button("Grand Roque")) {
             sendBigCastling();
         }
+        ImGui.endDisabled();
         ImGui.sameLine();
         if (ImGui.button("Annuler le coup précédent")) {
             sendUndo();

app/src/main/java/chess/view/DDDrender/Window.java

@@ -72,11 +72,11 @@ public class Window implements Closeable {
 		this.regularTasks = new ArrayList<>();
 	}
 
-	public void addRegularTask(Consumer<Float> task) {
+	public synchronized void addRegularTask(Consumer<Float> task) {
 		this.regularTasks.add(task);
 	}
 
-	public void removeRegularTask(Consumer<Float> task) {this.regularTasks.remove(task);}
+	public synchronized void removeRegularTask(Consumer<Float> task) {this.regularTasks.remove(task);}
 
 	public synchronized void scheduleTask(Runnable runnable) {
 		this.tasks.add(runnable);
@@ -195,7 +195,7 @@ public class Window implements Closeable {
 		}
 	}
 
-	private void executeTasks(float delta) {
+	private synchronized void executeTasks(float delta) {
 		Runnable task = getNextTask();
 		while (task != null) {
 			task.run();