on windows, able to use dark style for native title

DSView/pv/mainframe.cpp

@@ -72,10 +72,10 @@ MainFrame::MainFrame()
 
     AppControl::Instance()->SetTopWindow(this);
 
-    #ifdef Q_OS_DARWIN
-        _is_native_title = false;       
+    #ifdef _WIN32
+        _is_native_title = true;       
     #else
-        _is_native_title = true;
+        _is_native_title = false;
     #endif
 
     setMinimumWidth(MainWindow::Min_Width);

DSView/pv/mainwindow.cpp

@@ -117,6 +117,7 @@ namespace pv
         _frame = parent;
 
         assert(title_bar);
+        assert(_frame);
 
         _title_bar = title_bar;
         AppControl::Instance()->add_font_form(title_bar);
@@ -1425,6 +1426,10 @@ namespace pv
         qApp->setStyleSheet(qss.readAll());
         qss.close();
 
+#ifdef _WIN32
+        setDark_Titlebar(reinterpret_cast<HWND>(_frame->winId()), style == THEME_STYLE_DARK);
+#endif
+
         data_updated();
     }
 
@@ -2191,4 +2196,28 @@ namespace pv
         _view->update_all_trace_postion();
     }
 
+#ifdef _WIN32
+    void MainWindow::setDark_Titlebar(HWND hwnd, bool isDarkStyle)
+    {
+        HMODULE hUxtheme = LoadLibraryExW(L"uxtheme.dll", NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
+        HMODULE hUser32 = GetModuleHandleW(L"user32.dll");
+        fnAllowDarkModeForWindow AllowDarkModeForWindow
+            = reinterpret_cast<fnAllowDarkModeForWindow>(GetProcAddress(hUxtheme, MAKEINTRESOURCEA(133)));
+        fnSetPreferredAppMode SetPreferredAppMode
+            = reinterpret_cast<fnSetPreferredAppMode>(GetProcAddress(hUxtheme, MAKEINTRESOURCEA(135)));
+        fnSetWindowCompositionAttribute SetWindowCompositionAttribute
+            = reinterpret_cast<fnSetWindowCompositionAttribute>(GetProcAddress(hUser32, "SetWindowCompositionAttribute"));
+
+        SetPreferredAppMode(AllowDark);
+        BOOL dark = isDarkStyle;
+        AllowDarkModeForWindow(hwnd, dark);
+        WINDOWCOMPOSITIONATTRIBDATA data = {
+            WCA_USEDARKMODECOLORS,
+            &dark,
+            sizeof(dark)
+        };
+        SetWindowCompositionAttribute(hwnd, &data);
+    }
+#endif
+
 } // namespace pv

DSView/pv/mainwindow.h

@@ -34,6 +34,61 @@
 #include <chrono>
 #include "dstimer.h"
 
+#ifdef _WIN32
+#include <Windows.h>
+#include <dwmapi.h>
+#pragma comment (lib, "Dwmapi.lib")
+
+enum PreferredAppMode {
+    Default,
+    AllowDark,
+    ForceDark,
+    ForceLight,
+    Max
+};
+
+enum WINDOWCOMPOSITIONATTRIB {
+    WCA_UNDEFINED = 0,
+    WCA_NCRENDERING_ENABLED = 1,
+    WCA_NCRENDERING_POLICY = 2,
+    WCA_TRANSITIONS_FORCEDISABLED = 3,
+    WCA_ALLOW_NCPAINT = 4,
+    WCA_CAPTION_BUTTON_BOUNDS = 5,
+    WCA_NONCLIENT_RTL_LAYOUT = 6,
+    WCA_FORCE_ICONIC_REPRESENTATION = 7,
+    WCA_EXTENDED_FRAME_BOUNDS = 8,
+    WCA_HAS_ICONIC_BITMAP = 9,
+    WCA_THEME_ATTRIBUTES = 10,
+    WCA_NCRENDERING_EXILED = 11,
+    WCA_NCADORNMENTINFO = 12,
+    WCA_EXCLUDED_FROM_LIVEPREVIEW = 13,
+    WCA_VIDEO_OVERLAY_ACTIVE = 14,
+    WCA_FORCE_ACTIVEWINDOW_APPEARANCE = 15,
+    WCA_DISALLOW_PEEK = 16,
+    WCA_CLOAK = 17,
+    WCA_CLOAKED = 18,
+    WCA_ACCENT_POLICY = 19,
+    WCA_FREEZE_REPRESENTATION = 20,
+    WCA_EVER_UNCLOAKED = 21,
+    WCA_VISUAL_OWNER = 22,
+    WCA_HOLOGRAPHIC = 23,
+    WCA_EXCLUDED_FROM_DDA = 24,
+    WCA_PASSIVEUPDATEMODE = 25,
+    WCA_USEDARKMODECOLORS = 26,
+    WCA_LAST = 27
+};
+
+struct WINDOWCOMPOSITIONATTRIBDATA {
+    WINDOWCOMPOSITIONATTRIB Attrib;
+    PVOID pvData;
+    SIZE_T cbData;
+};
+
+using fnAllowDarkModeForWindow =  BOOL (WINAPI *)(HWND hWnd, BOOL allow);
+using fnSetPreferredAppMode = PreferredAppMode (WINAPI *)(PreferredAppMode appMode);
+using fnSetWindowCompositionAttribute =  BOOL (WINAPI *)(HWND hwnd, WINDOWCOMPOSITIONATTRIBDATA *);
+#endif
+
 class QAction;
 class QMenuBar;
 class QMenu;
@@ -157,6 +212,10 @@ private:
     QJsonArray get_decoder_json_from_data_file(QString file, bool &bSucesss);
     void check_config_file_version(); 
     void load_demo_decoder_config(QString optname);
+
+#ifdef _WIN32
+    static void setDark_Titlebar(HWND hwnd, bool isDarkStyle);
+#endif
    
 private:
     //ISessionCallback