refs #76 cross platform class to find and return pointer to a foreign window

src/blackgui/blackgui.pro

@@ -35,6 +35,11 @@ SOURCES += $$PWD/components/*.cpp
 FORMS   += $$PWD/components/*.ui
 FORMS   += $$PWD/*.ui
 
+win32 {
+    HEADERS += $$PWD/win/*.h
+    SOURCES += $$PWD/win/*.cpp
+}
+
 RESOURCES +=
 
 DESTDIR = ../../lib

src/blackgui/win/windowfinder_win.cpp

@@ -0,0 +1,41 @@
+/* Copyright (C) 2014
+ * swift Project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of Swift Project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "windowfinder_win.h"
+#include <QWindow>
+#include <QScopedArrayPointer>
+
+#include <windows.h>
+
+namespace BlackGui
+{
+    QWindow *CWindowFinderWindows::findForeignWindow(const QString &windowName, const QString &className)
+    {
+        QScopedArrayPointer<TCHAR> lpWindowName;
+        QScopedArrayPointer<TCHAR> lpClassName;
+
+        if (!windowName.isEmpty())
+        {
+            lpWindowName.reset(new TCHAR[windowName.size()+1]);
+            windowName.toWCharArray(lpWindowName.data());
+            lpWindowName[windowName.size()] = 0;
+        }
+        if (!className.isEmpty())
+        {
+            lpClassName.reset(new TCHAR[className.size()+1]);
+            className.toWCharArray(lpClassName.data());
+            lpClassName[className.size()] = 0;
+        }
+
+        HWND hWindow = FindWindow(lpClassName.data(), lpWindowName.data());
+
+        if (hWindow) return QWindow::fromWinId(reinterpret_cast<WId>(hWindow));
+        else return nullptr;
+    }
+}

src/blackgui/win/windowfinder_win.h

@@ -0,0 +1,36 @@
+/* Copyright (C) 2014
+ * swift Project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of Swift Project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKGUI_WINDOWFINDERWINDOWS_H
+#define BLACKGUI_WINDOWFINDERWINDOWS_H
+
+#include "../windowfinder.h"
+
+namespace BlackGui
+{
+    //! Foreign windows
+    class CWindowFinderWindows : public IWindowFinder
+    {
+    public:
+
+        //! Constructor
+        CWindowFinderWindows() {}
+
+        //! Destructor
+        virtual ~CWindowFinderWindows() {}
+
+        //! \copydoc IWindowFinder::findForeignWindow
+        virtual QWindow *findForeignWindow(const QString &windowName, const QString &className) override;
+
+    };
+}
+
+#endif // guard

src/blackgui/windowfinder.cpp

@@ -0,0 +1,34 @@
+/* Copyright (C) 2014
+ * swift Project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of Swift Project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "windowfinder.h"
+
+#if defined(Q_OS_WIN)
+    #include "win/windowfinder_win.h"
+#elif defined(Q_OS_LINUX)
+#elif defined(Q_OS_OSX)
+#else
+    #error "Platform is not supported!"
+#endif
+
+namespace BlackGui
+{
+    IWindowFinder *IWindowFinder::create()
+    {
+        IWindowFinder *finder = nullptr;
+
+#if defined(Q_OS_WIN)
+        finder = new CWindowFinderWindows();
+#elif defined(Q_OS_LINUX)
+#elif defined(Q_OS_OSX)
+#endif
+
+        return finder;
+    }
+}

src/blackgui/windowfinder.h

@@ -0,0 +1,40 @@
+/* Copyright (C) 2014
+ * swift Project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of Swift Project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKGUI_WINDOWFINDER_H
+#define BLACKGUI_WINDOWFINDER_H
+
+#include <QString>
+
+class QWindow;
+
+namespace BlackGui
+{
+    //! Finder for foreign windows
+    class IWindowFinder
+    {
+    public:
+
+        //! Constructor
+        IWindowFinder() {}
+
+        //! Destructor
+        virtual ~IWindowFinder() {}
+
+        //! Find and return a foreign window owned by another process
+        virtual QWindow *findForeignWindow(const QString &windowName, const QString &className) = 0;
+
+        //! Factory method
+        static IWindowFinder *create();
+    };
+}
+
+#endif // guard