mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-10 23:44:24 +00:00
348 lines
13 KiB
C++
348 lines
13 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2022 - Raw Material Software Limited
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 7 End-User License
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Agreement and JUCE Privacy Policy.
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End User License Agreement: www.juce.com/juce-7-licence
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Privacy Policy: www.juce.com/juce-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce::detail
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{
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#if JUCE_MSVC
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// required to enable the newer dialog box on vista and above
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#pragma comment(linker, \
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"\"/MANIFESTDEPENDENCY:type='Win32' " \
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"name='Microsoft.Windows.Common-Controls' " \
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"version='6.0.0.0' " \
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"processorArchitecture='*' " \
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"publicKeyToken='6595b64144ccf1df' " \
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"language='*'\"" \
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)
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#endif
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std::unique_ptr<ScopedMessageBoxInterface> ScopedMessageBoxInterface::create (const MessageBoxOptions& options)
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{
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class WindowsMessageBoxBase : public ScopedMessageBoxInterface
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{
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public:
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explicit WindowsMessageBoxBase (Component* comp)
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: associatedComponent (comp) {}
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void runAsync (std::function<void (int)> recipient) override
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{
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future = std::async (std::launch::async, [showMessageBox = getShowMessageBox(), recipient]
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{
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const auto initComResult = CoInitializeEx (nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
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if (initComResult != S_OK)
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return;
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const ScopeGuard scope { [] { CoUninitialize(); } };
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const auto messageResult = showMessageBox != nullptr ? showMessageBox() : 0;
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NullCheckedInvocation::invoke (recipient, messageResult);
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});
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}
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int runSync() override
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{
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if (auto showMessageBox = getShowMessageBox())
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return showMessageBox();
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return 0;
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}
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void close() override
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{
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if (auto* toClose = windowHandle.exchange (nullptr))
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EndDialog (toClose, 0);
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}
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void setDialogWindowHandle (HWND dialogHandle)
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{
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windowHandle = dialogHandle;
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}
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private:
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std::function<int()> getShowMessageBox()
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{
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const auto parent = associatedComponent != nullptr ? (HWND) associatedComponent->getWindowHandle() : nullptr;
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return getShowMessageBoxForParent (parent);
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}
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/* Returns a function that should display a message box and return the result.
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getShowMessageBoxForParent() will be called on the message thread.
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The returned function will be called on a separate thread, in order to avoid blocking the
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message thread.
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'this' is guaranteed to be alive when the returned function is called.
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*/
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virtual std::function<int()> getShowMessageBoxForParent (HWND parent) = 0;
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Component::SafePointer<Component> associatedComponent;
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std::atomic<HWND> windowHandle { nullptr };
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std::future<void> future;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (WindowsMessageBoxBase)
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};
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class PreVistaMessageBox : public WindowsMessageBoxBase
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{
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public:
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PreVistaMessageBox (const MessageBoxOptions& opts, UINT extraFlags)
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: WindowsMessageBoxBase (opts.getAssociatedComponent()),
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flags (extraFlags | getMessageBoxFlags (opts.getIconType())),
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title (opts.getTitle()), message (opts.getMessage()) {}
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private:
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std::function<int()> getShowMessageBoxForParent (const HWND parent) override
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{
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JUCE_ASSERT_MESSAGE_THREAD
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static std::map<DWORD, PreVistaMessageBox*> map;
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static std::mutex mapMutex;
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return [this, parent]
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{
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const auto threadId = GetCurrentThreadId();
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{
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const std::scoped_lock scope { mapMutex };
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map.emplace (threadId, this);
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}
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const ScopeGuard eraseFromMap { [threadId]
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{
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const std::scoped_lock scope { mapMutex };
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map.erase (threadId);
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} };
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const auto hookCallback = [] (int nCode, const WPARAM wParam, const LPARAM lParam)
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{
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auto* params = reinterpret_cast<CWPSTRUCT*> (lParam);
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if (nCode >= 0
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&& params != nullptr
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&& (params->message == WM_INITDIALOG || params->message == WM_DESTROY))
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{
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const auto callbackThreadId = GetCurrentThreadId();
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const std::scoped_lock scope { mapMutex };
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if (const auto iter = map.find (callbackThreadId); iter != map.cend())
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iter->second->setDialogWindowHandle (params->message == WM_INITDIALOG ? params->hwnd : nullptr);
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}
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return CallNextHookEx ({}, nCode, wParam, lParam);
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};
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const auto hook = SetWindowsHookEx (WH_CALLWNDPROC,
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hookCallback,
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(HINSTANCE) juce::Process::getCurrentModuleInstanceHandle(),
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threadId);
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const ScopeGuard removeHook { [hook] { UnhookWindowsHookEx (hook); } };
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const auto result = MessageBox (parent, message.toWideCharPointer(), title.toWideCharPointer(), flags);
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if (result == IDYES || result == IDOK) return 0;
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if (result == IDNO && ((flags & 1) != 0)) return 1;
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return 2;
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};
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}
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static UINT getMessageBoxFlags (MessageBoxIconType iconType) noexcept
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{
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// this window can get lost behind JUCE windows which are set to be alwaysOnTop
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// so if there are any set it to be topmost
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const auto topmostFlag = detail::WindowingHelpers::areThereAnyAlwaysOnTopWindows() ? MB_TOPMOST : 0;
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const auto iconFlags = [&]() -> decltype (topmostFlag)
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{
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switch (iconType)
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{
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case MessageBoxIconType::QuestionIcon: return MB_ICONQUESTION;
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case MessageBoxIconType::WarningIcon: return MB_ICONWARNING;
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case MessageBoxIconType::InfoIcon: return MB_ICONINFORMATION;
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case MessageBoxIconType::NoIcon: break;
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}
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return 0;
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}();
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return static_cast<UINT> (MB_TASKMODAL | MB_SETFOREGROUND | topmostFlag | iconFlags);
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}
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const UINT flags;
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const String title, message;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (PreVistaMessageBox)
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};
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class WindowsTaskDialog : public WindowsMessageBoxBase
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{
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static auto getTaskDialogFunc()
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{
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using TaskDialogIndirectFunc = HRESULT (WINAPI*) (const TASKDIALOGCONFIG*, INT*, INT*, BOOL*);
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static const auto result = [&]() -> TaskDialogIndirectFunc
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{
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if (SystemStats::getOperatingSystemType() < SystemStats::WinVista)
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return nullptr;
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const auto comctl = "Comctl32.dll";
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LoadLibraryA (comctl);
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const auto comctlModule = GetModuleHandleA (comctl);
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JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wcast-function-type")
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if (comctlModule != nullptr)
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return (TaskDialogIndirectFunc) GetProcAddress (comctlModule, "TaskDialogIndirect");
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JUCE_END_IGNORE_WARNINGS_GCC_LIKE
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return nullptr;
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}();
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return result;
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}
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public:
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explicit WindowsTaskDialog (const MessageBoxOptions& opts)
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: WindowsMessageBoxBase (opts.getAssociatedComponent()),
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iconType (opts.getIconType()),
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title (opts.getTitle()), message (opts.getMessage()),
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buttons { opts.getButtonText (0), opts.getButtonText (1), opts.getButtonText (2) } {}
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static bool isAvailable()
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{
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return getTaskDialogFunc() != nullptr;
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}
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private:
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std::function<int()> getShowMessageBoxForParent (const HWND parent) override
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{
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JUCE_ASSERT_MESSAGE_THREAD
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return [this, parent]
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{
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TASKDIALOGCONFIG config{};
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config.cbSize = sizeof (config);
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config.hwndParent = parent;
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config.pszWindowTitle = title.toWideCharPointer();
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config.pszContent = message.toWideCharPointer();
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config.hInstance = (HINSTANCE) Process::getCurrentModuleInstanceHandle();
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config.lpCallbackData = reinterpret_cast<LONG_PTR> (this);
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config.pfCallback = [] (HWND hwnd, UINT msg, WPARAM, LPARAM, LONG_PTR lpRefData)
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{
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if (auto* t = reinterpret_cast<WindowsTaskDialog*> (lpRefData))
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{
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switch (msg)
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{
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case TDN_CREATED:
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case TDN_DIALOG_CONSTRUCTED:
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t->setDialogWindowHandle (hwnd);
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break;
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case TDN_DESTROYED:
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t->setDialogWindowHandle (nullptr);
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break;
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}
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}
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return S_OK;
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};
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if (iconType == MessageBoxIconType::QuestionIcon)
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{
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if (auto* questionIcon = LoadIcon (nullptr, IDI_QUESTION))
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{
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config.hMainIcon = questionIcon;
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config.dwFlags |= TDF_USE_HICON_MAIN;
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}
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}
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else
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{
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config.pszMainIcon = [&]() -> LPWSTR
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{
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switch (iconType)
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{
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case MessageBoxIconType::WarningIcon: return TD_WARNING_ICON;
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case MessageBoxIconType::InfoIcon: return TD_INFORMATION_ICON;
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case MessageBoxIconType::QuestionIcon: JUCE_FALLTHROUGH
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case MessageBoxIconType::NoIcon:
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break;
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}
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return nullptr;
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}();
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}
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std::vector<TASKDIALOG_BUTTON> buttonLabels;
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for (const auto& buttonText : buttons)
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if (buttonText.isNotEmpty())
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buttonLabels.push_back ({ (int) buttonLabels.size(), buttonText.toWideCharPointer() });
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config.pButtons = buttonLabels.data();
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config.cButtons = (UINT) buttonLabels.size();
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int buttonIndex = 0;
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if (auto* func = getTaskDialogFunc())
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func (&config, &buttonIndex, nullptr, nullptr);
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else
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jassertfalse;
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return buttonIndex;
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};
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}
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const MessageBoxIconType iconType;
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const String title, message;
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const std::array<String, 3> buttons;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (WindowsTaskDialog)
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};
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if (WindowsTaskDialog::isAvailable())
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return std::make_unique<WindowsTaskDialog> (options);
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const auto extraFlags = [&options]
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{
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const auto numButtons = options.getNumButtons();
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if (numButtons == 3)
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return MB_YESNOCANCEL;
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if (numButtons == 2)
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return options.getButtonText (0) == "OK" ? MB_OKCANCEL
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: MB_YESNO;
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return MB_OK;
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}();
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return std::make_unique<PreVistaMessageBox> (options, (UINT) extraFlags);
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}
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} // namespace juce::detail
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