Fix focus handling in DialogPane

Replaced direct focus requests with Platform.runLater to ensure correct focus behavior. Consolidated button type settings into fewer cases and addressed focus issues in input dialogs to prevent buttons from stealing focus.

gemsfx/src/main/java/com/dlsc/gemsfx/DialogPane.java

@@ -8,6 +8,7 @@
 import javafx.animation.KeyValue;
 import javafx.animation.RotateTransition;
 import javafx.animation.Timeline;
+import javafx.application.Platform;
 import javafx.beans.InvalidationListener;
 import javafx.beans.binding.Bindings;
 import javafx.beans.property.BooleanProperty;
@@ -416,7 +417,7 @@ public final Dialog<Void> showError(String title, String message, String details
      * @param title   the title for the dialog
      * @param message the main error message
      * @param details additional details
-     * @param onSend an optional action to send out / forward the error message
+     * @param onSend  an optional action to send out / forward the error message
      * @return the dialog
      */
     public final Dialog<Void> showError(String title, String message, String details, Runnable onSend) {
@@ -456,8 +457,6 @@ public final Dialog<Void> showError(String title, String message, String details
             VBox content = new VBox(messageLabel, textArea);
             content.getStyleClass().add("error-container");
             dialog.setContent(content);
-
-            FocusUtil.requestFocus(textArea);
         }
 
         dialog.show();
@@ -625,7 +624,9 @@ public final Dialog<String> showTextInput(String title, String message, String p
             textInputControl = textField;
         }
 
-        FocusUtil.requestFocus(textInputControl);
+//        FocusUtil.requestFocus(textInputControl);
+
+        Platform.runLater(textInputControl::requestFocus);
 
         VBox box = new VBox();
         box.getStyleClass().add("prompt-node-wrapper");
@@ -1100,12 +1101,9 @@ public Dialog(DialogPane pane, Type type) {
                 case WARNING:
                     getButtonTypes().setAll(ButtonType.OK, ButtonType.CANCEL);
                     break;
-                case INFORMATION:
+                case INFORMATION, ERROR:
                     getButtonTypes().setAll(ButtonType.OK);
                     break;
-                case ERROR:
-                    getButtonTypes().setAll(ButtonType.CLOSE);
-                    break;
                 case CONFIRMATION:
                     getButtonTypes().setAll(ButtonType.YES, ButtonType.NO);
                     break;
@@ -1772,7 +1770,16 @@ private class ContentPane extends StackPane {
         private final ChangeListener<Node> focusListener = (o, oldOwner, newOwner) -> {
             if (newOwner != null && !isInsideDialogPane(newOwner.getParent()) && getScene() != null) {
                 if (oldOwner != null && isInsideDialogPane(oldOwner.getParent())) {
-                    oldOwner.requestFocus();
+                    if (getDialog().getType().equals(Type.INPUT)) {
+                        Node node = FocusUtil.findFirstFocusableNode(getDialog().getContent());
+                        if (node != null) {
+                            node.requestFocus();
+                        } else {
+                            oldOwner.requestFocus();
+                        }
+                    } else {
+                        oldOwner.requestFocus();
+                    }
                 } else {
                     requestFocus();
                 }
@@ -1977,10 +1984,11 @@ public static class DialogButtonBar extends ButtonBar {
         public DialogButtonBar(Dialog<?> dialog) {
             this.dialog = dialog;
 
-            // Setting the skin eagerly to make sure the focus does not
-            // switch to one of the buttons in the button bar when it
-            // should stay with a node shown by the dialog.
-            setSkin(new ButtonBarSkin(this));
+            if (dialog.getType().equals(Type.INPUT)) {
+                // initializing skin early or the skin will grab the focus later on for one of its buttons instead of
+                // leaving it with the control used for the input
+                setSkin(new ButtonBarSkin(this));
+            }
 
             getStyleClass().add("footer");