feat:Update example app feature

Author: Eatgrapes

example/src/main/java/dev/eatgrapes/live2d/example/ControlPanel.java

@@ -28,10 +28,33 @@ public static void show() {
             addExprButton(exprPanel, "Default", "Default");
             frame.add(exprPanel);
 
+            JPanel paramPanel = new JPanel(new GridLayout(0, 1));
+            paramPanel.setBorder(BorderFactory.createTitledBorder("Parameters"));
+            addSlider(paramPanel, "Angle X", "ParamAngleX", -30, 30, 0);
+            addSlider(paramPanel, "Angle Y", "ParamAngleY", -30, 30, 0);
+            addSlider(paramPanel, "Eye L Open", "ParamEyeLOpen", 0, 1, 1);
+            addSlider(paramPanel, "Eye R Open", "ParamEyeROpen", 0, 1, 1);
+            addSlider(paramPanel, "Mouth Open", "ParamMouthOpenY", 0, 1, 0);
+            addSlider(paramPanel, "Body X", "ParamBodyAngleX", -10, 10, 0);
+            frame.add(paramPanel);
+
             frame.setVisible(true);
         });
     }
 
+    private static void addSlider(JPanel panel, String label, String id, float min, float max, float initial) {
+        JPanel p = new JPanel(new BorderLayout());
+        JLabel l = new JLabel(label);
+        p.add(l, BorderLayout.WEST);
+        JSlider slider = new JSlider((int)(min * 100), (int)(max * 100), (int)(initial * 100));
+        slider.addChangeListener(e -> {
+            float val = slider.getValue() / 100.0f;
+            sendRequest("/parameter?id=" + id + "&value=" + val);
+        });
+        p.add(slider, BorderLayout.CENTER);
+        panel.add(p);
+    }
+
     private static void addMotionButton(JPanel panel, String label, String id) {
         JButton btn = new JButton(label);
         btn.addActionListener(e -> sendRequest("/motion?id=" + id));

example/src/main/java/dev/eatgrapes/live2d/example/Main.java

@@ -59,6 +59,22 @@ private void startServer() throws Exception {
             t.sendResponseHeaders(200, 0);
             t.close();
         });
+        server.createContext("/parameter", t -> {
+            String query = t.getRequestURI().getQuery();
+            String[] parts = query.split("&");
+            String id = "";
+            float value = 0;
+            for (String part : parts) {
+                String[] kv = part.split("=");
+                if (kv[0].equals("id")) id = kv[1];
+                else if (kv[0].equals("value")) value = Float.parseFloat(kv[1]);
+            }
+            String finalId = id;
+            float finalValue = value;
+            taskQueue.add(() -> model.setParameterValue(finalId, finalValue));
+            t.sendResponseHeaders(200, 0);
+            t.close();
+        });
         server.setExecutor(null);
         server.start();
         System.out.println("Control server started on port 8080");