feat: 支持清除日志

mainwindow.cpp

@@ -208,6 +208,14 @@ MainWindow::MainWindow(QWidget *parent) :
             }
     );
 
+    // 清空日志
+    connect(ui->clearLogPushButton, &QPushButton::clicked,
+            [&]()
+            {
+                ui->logPlainTextEdit->clear();
+            }
+    );
+
     connect(this, &MainWindow::SetModeFinished, this,
 			[&]()
 		    {

mainwindow.ui

@@ -68,6 +68,8 @@ Line3</string>
      </widget>
     </item>
     <item row="4" column="0">
+     <layout class="QHBoxLayout" name="logButtonLayout">
+      <item>
        <widget class="QPushButton" name="copyLogPushButton">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
@@ -83,6 +85,24 @@ Line3</string>
         </property>
        </widget>
       </item>
+      <item>
+       <widget class="QPushButton" name="clearLogPushButton">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="toolTip">
+         <string>清空窗口中的日志</string>
+        </property>
+        <property name="text">
+         <string>清空日志</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
     <item row="4" column="1">
      <widget class="QPushButton" name="pushButton1">
       <property name="text">