记住上次退出时的主窗体位置

Author: yiding-he

src/main/java/com/xwintop/xJavaFxTool/Main.java

@@ -3,22 +3,23 @@
 import com.jfoenix.controls.JFXDecorator;
 import com.xwintop.xJavaFxTool.controller.IndexController;
 import com.xwintop.xJavaFxTool.utils.Config;
+import com.xwintop.xJavaFxTool.utils.Config.Keys.MainWindow;
 import com.xwintop.xJavaFxTool.utils.StageUtils;
 import com.xwintop.xJavaFxTool.utils.XJavaFxSystemUtil;
 import com.xwintop.xcore.util.javafx.AlertUtil;
 import com.xwintop.xcore.util.javafx.JavaFxViewUtil;
+import java.util.ResourceBundle;
+import java.util.prefs.Preferences;
 import javafx.application.Application;
-import javafx.event.EventHandler;
+import javafx.application.Platform;
+import javafx.event.Event;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Parent;
 import javafx.scene.Scene;
 import javafx.scene.image.Image;
 import javafx.stage.Stage;
-import javafx.stage.WindowEvent;
 import lombok.extern.slf4j.Slf4j;
 
-import java.util.ResourceBundle;
-
 /**
  * @ClassName: Main
  * @Description: 启动类
@@ -27,6 +28,9 @@
  */
 @Slf4j
 public class Main extends Application {
+
+    public static final String PREFERENCE_ROOT = "com.xwintop.xJavaFxTool";
+
     private static Stage stage;
 
     public static void main(String[] args) {
@@ -46,35 +50,75 @@ public void start(Stage primaryStage) throws Exception {
         FXMLLoader fXMLLoader = IndexController.getFXMLLoader();
         ResourceBundle resourceBundle = fXMLLoader.getResources();
         Parent root = fXMLLoader.load();
-        JFXDecorator decorator = JavaFxViewUtil.getJFXDecorator(primaryStage, resourceBundle.getString("Title") + Config.xJavaFxToolVersions, "/images/icon.jpg", root);
-        decorator.setOnCloseButtonAction(() -> {
-            if (AlertUtil.showConfirmAlert("确定要退出吗？")) {
-                System.exit(0);
-            }
-        });
+
+        JFXDecorator decorator = JavaFxViewUtil.getJFXDecorator(
+            primaryStage,
+            resourceBundle.getString("Title") + Config.xJavaFxToolVersions,
+            "/images/icon.jpg",
+            root
+        );
+        decorator.setOnCloseButtonAction(() -> confirmExit(null));
+
         Scene scene = JavaFxViewUtil.getJFXDecoratorScene(decorator);
-//		Scene scene = new Scene(root);
+
         primaryStage.setResizable(true);
         primaryStage.setTitle(resourceBundle.getString("Title"));//标题
         primaryStage.getIcons().add(new Image("/images/icon.jpg"));//图标
         primaryStage.setScene(scene);
-        primaryStage.show();
+        primaryStage.setOnCloseRequest(this::confirmExit);
 
-        primaryStage.setOnCloseRequest(new EventHandler<WindowEvent>() {
-            @Override
-            public void handle(WindowEvent event) {
-                if (AlertUtil.showConfirmAlert("确定要退出吗？")) {
-                    System.exit(0);
-                } else {
-                    event.consume();
-                }
-            }
-        });
+        loadPrimaryStageBound(primaryStage);
+        primaryStage.show();
 
         StageUtils.updateStageStyle(primaryStage);
         stage = primaryStage;
     }
 
+    private void loadPrimaryStageBound(Stage stage) {
+        double left = getPreferences().getDouble(MainWindow.LEFT, -1);
+        double top = getPreferences().getDouble(MainWindow.TOP, -1);
+        double width = getPreferences().getDouble(MainWindow.WIDTH, -1);
+        double height = getPreferences().getDouble(MainWindow.HEIGHT, -1);
+
+        if (left > 0) {
+            stage.setX(left);
+        }
+        if (top > 0) {
+            stage.setY(top);
+        }
+        if (width > 0) {
+            stage.setWidth(width);
+        }
+        if (height > 0) {
+            stage.setHeight(height);
+        }
+    }
+
+    private Preferences getPreferences() {
+        return Preferences.userRoot().node(PREFERENCE_ROOT);
+    }
+
+    private void confirmExit(Event event) {
+        if (AlertUtil.showConfirmAlert("确定要退出吗？")) {
+            savePrimaryStageBound();
+            Platform.exit();
+            System.exit(0);
+        } else if (event != null) {
+            event.consume();
+        }
+    }
+
+    private void savePrimaryStageBound() {
+        if (stage == null || stage.isIconified()) {
+            return;
+        }
+
+        getPreferences().putDouble(MainWindow.LEFT, stage.getX());
+        getPreferences().putDouble(MainWindow.TOP, stage.getY());
+        getPreferences().putDouble(MainWindow.WIDTH, stage.getWidth());
+        getPreferences().putDouble(MainWindow.HEIGHT, stage.getHeight());
+    }
+
     public static Stage getStage() {
         return stage;
     }

src/main/java/com/xwintop/xJavaFxTool/utils/Config.java

@@ -6,8 +6,30 @@
  * 配置文件
  */
 public class Config {
-	public static Locale defaultLocale = Locale.getDefault();// 设置系统语言
 
-	public static final String xJavaFxToolVersions = "V0.2.0";// xJavaFxTool版本信息
-	public static final int xJavaFxToolVersionsInteger = 12;// xJavaFxTool更新信息
+    public static Locale defaultLocale = Locale.getDefault();// 设置系统语言
+
+    public static final String xJavaFxToolVersions = "V0.2.0";// xJavaFxTool版本信息
+
+    public static final int xJavaFxToolVersionsInteger = 12;// xJavaFxTool更新信息
+
+	/**
+	 * 集中存放配置 key 的地方
+	 */
+    public static class Keys {
+
+		/**
+		 * 窗体相关配置
+		 */
+		public static class MainWindow {
+
+            public static final String WIDTH = "main-window.width";
+
+            public static final String HEIGHT = "main-window.height";
+
+            public static final String TOP = "main-window.top";
+
+            public static final String LEFT = "main-window.left";
+        }
+    }
 }