修正开启“在副显示器中显示任务栏窗口”的状态下，当更改系统设置中“在所有显示器中显示任务栏”选项时，任务栏窗口可能会不显示的问题

Author: zhongyang219

TrafficMonitor/TaskBarDlg.cpp

@@ -696,7 +696,15 @@ void CTaskBarDlg::ApplyWindowTransparentColor()
 bool CTaskBarDlg::IsTaskbarChanged()
 {
     bool is_scendary_display;
-    return m_hTaskbar != FindTaskbarHandle(is_scendary_display);
+    static HWND last_taskbar_handle{};
+    HWND taskbar_handle = FindTaskbarHandle(is_scendary_display);
+    bool changed{ false };
+    if (last_taskbar_handle != taskbar_handle)
+    {
+        changed = true;
+        last_taskbar_handle = taskbar_handle;
+    }
+    return changed;
 }
 
 void CTaskBarDlg::WidthChanged()

TrafficMonitor/TrafficMonitorDlg.cpp

@@ -1919,12 +1919,16 @@ void CTrafficMonitorDlg::OnTimer(UINT_PTR nIDEvent)
         {
             ++m_taskbar_timer_cnt;
 
-            if (theApp.m_taskbar_data.show_taskbar_wnd_in_secondary_display && CWindowsSettingHelper::IsTaskbarShowingInAllDisplays())
+            if (theApp.m_taskbar_data.show_taskbar_wnd_in_secondary_display)
             {
                 if (m_tBarDlg->IsTaskbarChanged())
                 {
-                    CloseTaskBarWnd();
-                    OpenTaskBarWnd();
+                    //延迟一段时间后重启任务栏窗口
+                    KillTimer(RESTART_TASKBAR_TIMER);
+                    SetTimer(RESTART_TASKBAR_TIMER, 500, [](HWND, UINT, UINT_PTR, DWORD) {
+                        theApp.m_pMainWnd->SendMessage(WM_REOPEN_TASKBAR_WND);
+                        ::KillTimer(theApp.m_pMainWnd->GetSafeHwnd(), RESTART_TASKBAR_TIMER);
+                    });
                 }
             }
 

TrafficMonitor/stdafx.h

@@ -86,6 +86,7 @@ using std::ofstream;
 #define CONNECTION_DETAIL_TIMER 1237
 #define MONITOR_TIMER 1238
 #define DELETE_NOTIFY_ICON_TIMER 1239   //删除通知区图标的定时器
+#define RESTART_TASKBAR_TIMER 1240
 
 #define MAX_INSERT_TO_TASKBAR_CNT 200     //尝试嵌入任务栏的最大次数
 #define WARN_INSERT_TO_TASKBAR_CNT 20     //尝试嵌入任务栏的警告次数