Fix dark mode tab left-right control for floating docking containers

Fix #11683, close #11684

PowerEditor/src/NppDarkMode.cpp

@@ -1326,6 +1326,24 @@ namespace NppDarkMode
 			RemoveWindowSubclass(hWnd, TabSubclass, g_tabSubclassID);
 			break;
 		}
+
+		case WM_PARENTNOTIFY:
+		{
+			switch (LOWORD(wParam))
+			{
+				case WM_CREATE:
+				{
+					auto hwndUpdown = reinterpret_cast<HWND>(lParam);
+					if (NppDarkMode::subclassTabUpDownControl(hwndUpdown))
+					{
+						return 0;
+					}
+					break;
+				}
+			}
+			return 0;
+		}
+
 		}
 		return DefSubclassProc(hWnd, uMsg, wParam, lParam);
 	}
@@ -1725,32 +1743,20 @@ namespace NppDarkMode
 		return DefSubclassProc(hWnd, uMsg, wParam, lParam);
 	}
 
-	void subclassTabUpDownControl(HWND hwnd)
+	bool subclassTabUpDownControl(HWND hwnd)
 	{
-		auto pButtonData = reinterpret_cast<DWORD_PTR>(new ButtonData());
+		constexpr size_t classNameLen = 16;
-		SetWindowSubclass(hwnd, TabUpDownSubclass, g_tabUpDownSubclassID, pButtonData);
+		TCHAR className[classNameLen]{};
-	}
+		GetClassName(hwnd, className, classNameLen);
+		if (wcscmp(className, UPDOWN_CLASS) == 0)
+		{
+			auto pButtonData = reinterpret_cast<DWORD_PTR>(new ButtonData());
+			SetWindowSubclass(hwnd, TabUpDownSubclass, g_tabUpDownSubclassID, pButtonData);
+			NppDarkMode::setDarkExplorerTheme(hwnd);
+			return true;
+		}
 
-	void autoSubclassAndThemeTabUpDownControl(HWND hwndParent, HWND hwndUpdown)
+		return false;
-	{
-		EnumChildWindows(hwndParent, [](HWND hwnd, LPARAM lParam) WINAPI_LAMBDA{
-			auto && hwndUpdown = *reinterpret_cast<HWND*>(lParam);
-			if (hwndUpdown == nullptr)
-			{
-				constexpr size_t classNameLen = 16;
-				TCHAR className[classNameLen]{};
-				GetClassName(hwnd, className, classNameLen);
-				if (wcscmp(className, UPDOWN_CLASS) == 0)
-				{
-					hwndUpdown = hwnd;
-					NppDarkMode::subclassTabUpDownControl(hwndUpdown);
-					NppDarkMode::setDarkExplorerTheme(hwndUpdown);
-					::InvalidateRect(hwndUpdown, nullptr, TRUE);
-					::UpdateWindow(hwndUpdown);
-				}
-			}
-			return TRUE;
-			}, reinterpret_cast<LPARAM>(&hwndUpdown));
 	}
 
 	void setDarkTitleBar(HWND hwnd)

PowerEditor/src/NppDarkMode.h

@@ -160,7 +160,7 @@ namespace NppDarkMode
 	void autoSubclassAndThemeChildControls(HWND hwndParent, bool subclass = true, bool theme = true);
 	void autoThemeChildControls(HWND hwndParent);
 
-	void autoSubclassAndThemeTabUpDownControl(HWND hwndParent, HWND hwndUpdown);
+	bool subclassTabUpDownControl(HWND hwnd);
 
 	void setDarkTitleBar(HWND hwnd);
 	void setDarkExplorerTheme(HWND hwnd);

PowerEditor/src/WinControls/DockingWnd/DockingCont.cpp

@@ -952,6 +952,25 @@ LRESULT DockingCont::runProcTab(HWND hwnd, UINT Message, WPARAM wParam, LPARAM l
 			}
 			break;
 		}
+
+		case WM_PARENTNOTIFY:
+		{
+			switch (LOWORD(wParam))
+			{
+				case WM_CREATE:
+				{
+					auto hwndUpdown = reinterpret_cast<HWND>(lParam);
+					if (NppDarkMode::subclassTabUpDownControl(hwndUpdown))
+					{
+						_hTabUpdown = hwndUpdown;
+						return 0;
+					}
+					break;
+				}
+			}
+			return 0;
+		}
+
 		default:
 			break;
 	}
@@ -1225,7 +1244,11 @@ void DockingCont::onSize()
 								rcTemp.left, rcTemp.top, rcTemp.right, rcTemp.bottom, 
 								SWP_NOZORDER | SWP_SHOWWINDOW |  SWP_NOACTIVATE);
 
-				NppDarkMode::autoSubclassAndThemeTabUpDownControl(_hContTab, _hTabUpdown);
+				if (_hTabUpdown != nullptr)
+				{
+					::InvalidateRect(_hTabUpdown, nullptr, TRUE);
+					::UpdateWindow(_hTabUpdown);
+				}
 			}
 
 			// resize client area for plugin
@@ -1246,8 +1269,6 @@ void DockingCont::onSize()
 			::SetWindowPos(::GetDlgItem(_hSelf, IDC_CLIENT_TAB), NULL,
 							rcTemp.left, rcTemp.top, rcTemp.right, rcTemp.bottom, 
 							SWP_NOZORDER | SWP_NOACTIVATE);
-
-			NppDarkMode::autoSubclassAndThemeTabUpDownControl(_hContTab, _hTabUpdown);
 		}
 		// resize to float window
 		else
@@ -1269,6 +1290,12 @@ void DockingCont::onSize()
 				::SetWindowPos(_hContTab, NULL,
 								rcTemp.left, rcTemp.top, rcTemp.right, rcTemp.bottom, 
 								SWP_NOZORDER | SWP_SHOWWINDOW);
+
+				if (_hTabUpdown != nullptr)
+				{
+					::InvalidateRect(_hTabUpdown, nullptr, TRUE);
+					::UpdateWindow(_hTabUpdown);
+				}
 			}
 
 			// resize client area for plugin

PowerEditor/src/WinControls/TabBar/TabBar.cpp

@@ -241,8 +241,6 @@ void TabBar::reSizeTo(RECT & rc2Ajust)
 		rc2Ajust.top += tabsHight;
 		rc2Ajust.bottom -= tabsHight;
 	}
-
-	NppDarkMode::autoSubclassAndThemeTabUpDownControl(_hSelf, _hTabUpdown);
 }
 
 
@@ -982,6 +980,23 @@ LRESULT TabBarPlus::runProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lPara
 			EndPaint(hwnd, &ps);
 			return 0;
 		}
+
+		case WM_PARENTNOTIFY:
+		{
+			switch (LOWORD(wParam))
+			{
+				case WM_CREATE:
+				{
+					auto hwndUpdown = reinterpret_cast<HWND>(lParam);
+					if (NppDarkMode::subclassTabUpDownControl(hwndUpdown))
+					{
+						return 0;
+					}
+					break;
+				}
+			}
+			return 0;
+		}
 	}
 
 	return ::CallWindowProc(_tabBarDefaultProc, hwnd, Message, wParam, lParam);

PowerEditor/src/WinControls/TabBar/TabBar.h

@@ -114,8 +114,6 @@ protected:
 	long getRowCount() const {
 		return long(::SendMessage(_hSelf, TCM_GETROWCOUNT, 0, 0));
 	}
-private:
-	HWND _hTabUpdown = nullptr;
 };