feat(ui): 增加拖拽窗口功能并优化渲染方法

Author: LangYa466

src/main/java/cn/langya/ui/clickgui/DragWindow.java

@@ -0,0 +1,56 @@
+package cn.langya.ui.clickgui;
+
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * @author LangYa466
+ * @since 2/15/2025
+ */
+@Getter
+@Setter
+public class DragWindow {
+    private int x, y, width, height;
+    private boolean dragging = false;
+    private int dragOffsetX, dragOffsetY;
+
+    public DragWindow(int x, int y, int width, int height) {
+        this.x = x;
+        this.y = y;
+        this.width = width;
+        this.height = height;
+    }
+
+    /**
+     * 判断鼠标是否在窗口标题区域（高度 headerHeight 内）
+     */
+    public boolean isHoveringHeader(int mouseX, int mouseY, int headerHeight) {
+        return mouseX >= x && mouseX <= x + width && mouseY >= y && mouseY <= y + headerHeight;
+    }
+
+    /**
+     * 开始拖拽，并记录初始偏移量
+     */
+    public void startDrag(int mouseX, int mouseY) {
+        dragging = true;
+        dragOffsetX = mouseX - x;
+        dragOffsetY = mouseY - y;
+    }
+
+    /**
+     * 拖拽中，更新窗口位置
+     */
+    public void drag(int mouseX, int mouseY) {
+        if (dragging) {
+            x = mouseX - dragOffsetX;
+            y = mouseY - dragOffsetY;
+        }
+    }
+
+    /**
+     * 停止拖拽
+     */
+    public void stopDrag() {
+        dragging = false;
+    }
+}