opt(tools): 优化 graphviz_render.py, 当收到的数据与上次一样时，不刷重新绘制界面

Author: hevake

tools/check_and_archive_log_files.sh

@@ -1,5 +1,25 @@
 #!/bin/bash
 
+#
+#     .============.
+#    //  M A K E  / \
+#   //  C++ DEV  /   \
+#  //  E A S Y  /  \/ \
+# ++ ----------.  \/\  .
+#  \\     \     \ /\  /
+#   \\     \     \   /
+#    \\     \     \ /
+#     -============'
+#
+# Copyright (c) 2025 Hevake and contributors, all rights reserved.
+#
+# This file is part of cpp-tbox (https://github.com/cpp-main/cpp-tbox)
+# Use of this source code is governed by MIT license that can be found
+# in the LICENSE file in the root of the source tree. All contributing
+# project authors may be found in the CONTRIBUTORS.md file in the root
+# of the source tree.
+#
+
 # 打包日志文件脚本
 
 if [ $# -lt 2 ]; then

tools/graphviz_render.py

@@ -234,6 +234,7 @@ def __init__(self, pipe_name):
         self.pipe_name = pipe_name
         self.original_image = None
         self.current_pixmap = None
+        self.last_dot_data = ''
         self.setup_ui()
 
     def setup_ui(self):
@@ -282,27 +283,30 @@ def on_resize(self, event):
         self.resize_timer.start(100)
 
     def update_graph(self, dot_data):
-        try:
-            # Render DOT data using Graphviz
-            proc = subprocess.Popen(
-                ['dot', '-Tpng'],
-                stdin=subprocess.PIPE,
-                stdout=subprocess.PIPE
-            )
-            output, _ = proc.communicate(dot_data.encode())
+        if dot_data != self.last_dot_data:
+            self.last_dot_data = dot_data
+
+            try:
+                # Render DOT data using Graphviz
+                proc = subprocess.Popen(
+                    ['dot', '-Tpng'],
+                    stdin=subprocess.PIPE,
+                    stdout=subprocess.PIPE
+                )
+                output, _ = proc.communicate(dot_data.encode())
 
-            # Convert to PIL Image
-            self.original_image = Image.open(BytesIO(output))
+                # Convert to PIL Image
+                self.original_image = Image.open(BytesIO(output))
 
-            # Update timestamp
-            current_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
-            self.timestamp_label.setText(current_time)
+                # Update image display
+                self.update_image()
 
-            # Update image display
-            self.update_image()
+            except Exception as e:
+                print(f"Error rendering graph: {e}")
 
-        except Exception as e:
-            print(f"Error rendering graph: {e}")
+        # Update timestamp
+        current_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+        self.timestamp_label.setText(current_time)
 
     def update_image(self):
         if self.original_image is None: