109 lines
3.5 KiB
C
109 lines
3.5 KiB
C
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#pragma once
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#include <unknwn.h> // To enable support for non-WinRT interfaces, unknwn.h must be included before any C++/WinRT headers.
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#include <winrt/Windows.System.h>
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#include <winrt/Windows.Foundation.h>
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#include <winrt/Windows.Foundation.Collections.h>
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#pragma push_macro("GetCurrentTime")
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#undef GetCurrentTime
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#include <winrt/Windows.UI.Xaml.Hosting.h>
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#pragma pop_macro("GetCurrentTime")
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#include <winrt/Windows.UI.Xaml.Markup.h>
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#include <windows.ui.xaml.hosting.desktopwindowxamlsource.h>
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#include <windowsx.h>
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#include <wil/resource.h>
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class DesktopWindow
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{
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protected:
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int MessageLoop(HACCEL accelerators);
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HWND CreateDesktopWindowsXamlSource(DWORD extraStyles, const winrt::Windows::UI::Xaml::UIElement& content);
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void ClearXamlIslands();
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HWND WindowHandle() const
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{
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return m_window.get();
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}
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static void OnNCCreate(HWND window, LPARAM lparam) noexcept
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{
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auto cs = reinterpret_cast<CREATESTRUCT*>(lparam);
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auto that = static_cast<DesktopWindow*>(cs->lpCreateParams);
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that->m_window.reset(window); // take ownership of the window
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SetWindowLongPtrW(window, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(that));
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}
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private:
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winrt::Windows::UI::Xaml::Hosting::DesktopWindowXamlSource GetFocusedIsland();
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bool FilterMessage(const MSG* msg);
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void OnTakeFocusRequested(winrt::Windows::UI::Xaml::Hosting::DesktopWindowXamlSource const& sender, winrt::Windows::UI::Xaml::Hosting::DesktopWindowXamlSourceTakeFocusRequestedEventArgs const& args);
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winrt::Windows::UI::Xaml::Hosting::DesktopWindowXamlSource GetNextFocusedIsland(const MSG* msg);
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bool NavigateFocus(MSG* msg);
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wil::unique_hwnd m_window;
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winrt::guid m_lastFocusRequestId;
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std::vector<winrt::Windows::UI::Xaml::Hosting::DesktopWindowXamlSource::TakeFocusRequested_revoker> m_takeFocusEventRevokers;
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std::vector<winrt::Windows::UI::Xaml::Hosting::DesktopWindowXamlSource> m_xamlSources;
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};
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template<typename T>
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struct DesktopWindowT : public DesktopWindow
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{
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protected:
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using base_type = DesktopWindowT<T>;
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static LRESULT __stdcall WndProc(HWND window, UINT message, WPARAM wparam, LPARAM lparam) noexcept
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{
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if (message == WM_NCCREATE)
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{
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OnNCCreate(window, lparam);
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}
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else if (message == WM_NCDESTROY)
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{
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SetWindowLongPtrW(window, GWLP_USERDATA, 0);
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}
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else if (auto that = reinterpret_cast<T*>(GetWindowLongPtrW(window, GWLP_USERDATA)))
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{
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return that->MessageHandler(message, wparam, lparam);
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}
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return DefWindowProcW(window, message, wparam, lparam);
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}
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LRESULT MessageHandler(UINT message, WPARAM wParam, LPARAM lParam) noexcept
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{
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switch (message)
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{
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HANDLE_MSG(WindowHandle(), WM_DESTROY, OnDestroy);
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HANDLE_MSG(WindowHandle(), WM_ACTIVATE, OnActivate);
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HANDLE_MSG(WindowHandle(), WM_SETFOCUS, OnSetFocus);
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}
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return DefWindowProcW(WindowHandle(), message, wParam, lParam);
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}
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void OnDestroy(HWND)
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{
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ClearXamlIslands();
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PostQuitMessage(0);
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}
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private:
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void OnActivate(HWND, UINT state, HWND hwndActDeact, BOOL fMinimized)
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{
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if (state == WA_INACTIVE)
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{
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m_hwndLastFocus = GetFocus();
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}
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}
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void OnSetFocus(HWND, HWND hwndOldFocus)
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{
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if (m_hwndLastFocus)
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{
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SetFocus(m_hwndLastFocus);
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}
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}
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HWND m_hwndLastFocus = nullptr;
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};
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