From 1f19a9e74d02e7fddf066cc47851c9407df30c2f Mon Sep 17 00:00:00 2001
From: Akash Mozumdar <akashmozumdar@gmail.com>
Date: Sat, 6 Nov 2021 16:52:26 -0600
Subject: [PATCH] use system global hotkey

---
 extensions/extrawindow.cpp | 28 ++++++++++++++++++----------
 text.cpp                   |  2 +-
 2 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/extensions/extrawindow.cpp b/extensions/extrawindow.cpp
index beac6e8..2ec15a6 100644
--- a/extensions/extrawindow.cpp
+++ b/extensions/extrawindow.cpp
@@ -13,6 +13,7 @@
 #include <QFontMetrics>
 #include <QMouseEvent>
 #include <QWheelEvent>
+#include <QAbstractNativeEventFilter>
 
 extern const char* EXTRA_WINDOW_INFO;
 extern const char* SENTENCE_TOO_BIG;
@@ -36,6 +37,7 @@ extern const char* FONT;
 extern const char* SAVE_SETTINGS;
 
 constexpr auto DICTIONARY_SAVE_FILE = u8"SavedDictionary.txt";
+constexpr int CLICK_THROUGH_HOTKEY = 0xc0d0;
 
 QColor colorPrompt(QWidget* parent, QColor default, const QString& title, bool customOpacity = true)
 {
@@ -153,7 +155,7 @@ private:
 	}* outliner;
 };
 
-class ExtraWindow : public PrettyWindow
+class ExtraWindow : public PrettyWindow, QAbstractNativeEventFilter
 {
 public:
 	ExtraWindow() : PrettyWindow("Extra Window")
@@ -168,7 +170,6 @@ public:
 			{ AUTO_RESIZE_WINDOW_HEIGHT, false, &ExtraWindow::SetAutoResizeHeight },
 			{ SHOW_ORIGINAL, true, &ExtraWindow::SetShowOriginal },
 			{ DICTIONARY, false, &ExtraWindow::SetUseDictionary },
-			{ CLICK_THROUGH, false, &ExtraWindow::SetClickThrough },
 		})
 		{
 			// delay processing anything until Textractor has finished initializing
@@ -176,22 +177,21 @@ public:
 			auto action = menu.addAction(name, this, slot);
 			action->setCheckable(true);
 			action->setChecked(default);
-			if (slot == &ExtraWindow::SetClickThrough)
-			{
-				action->setShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_T));
-				action->setShortcutContext(Qt::ApplicationShortcut);
-				addAction(action);
-			}
 		}
+
+		menu.addAction(CLICK_THROUGH, this, &ExtraWindow::ToggleClickThrough);
+
 		menu.addAction(MAX_SENTENCE_SIZE, this, [this]
 		{
 			settings.setValue(MAX_SENTENCE_SIZE, maxSentenceSize = QInputDialog::getInt(this, MAX_SENTENCE_SIZE, "", maxSentenceSize, 0, INT_MAX, 1, nullptr, Qt::WindowCloseButtonHint));
 		});
 		ui.display->installEventFilter(this);
 		ui.display->setMouseTracking(true);
+		qApp->installNativeEventFilter(this);
 
 		QMetaObject::invokeMethod(this, [this]
 		{
+			RegisterHotKey((HWND)winId(), CLICK_THROUGH_HOTKEY, MOD_SHIFT | MOD_NOREPEAT, 0x58);
 			show();
 			AddSentence(EXTRA_WINDOW_INFO);
 		}, Qt::QueuedConnection);
@@ -257,9 +257,9 @@ private:
 		}
 	}
 
-	void SetClickThrough(bool clickThrough)
+	void ToggleClickThrough()
 	{
-		if (clickThrough)
+		if (clickThrough = !clickThrough)
 		{
 			setAttribute(Qt::WA_TransparentForMouseEvents, true);
 			setWindowFlags(windowFlags() | Qt::WindowStaysOnTopHint);
@@ -329,6 +329,14 @@ private:
 		dictionaryWindow.move(ui.display->mapToGlobal(QPoint(x, y - dictionaryWindow.height())));
 	}
 
+	bool nativeEventFilter(const QByteArray&, void* message, LRESULT* result) override
+	{
+		auto msg = (MSG*)message;
+		if (msg->message != WM_HOTKEY || msg->wParam != CLICK_THROUGH_HOTKEY) return false;
+		ToggleClickThrough();
+		return true;
+	}
+
 	bool eventFilter(QObject*, QEvent* event) override
 	{
 		if (useDictionary && event->type() == QEvent::MouseMove) ComputeDictionaryPosition(((QMouseEvent*)event)->localPos().toPoint());
diff --git a/text.cpp b/text.cpp
index 5208b0e..531b65d 100644
--- a/text.cpp
+++ b/text.cpp
@@ -180,7 +180,7 @@ const char* SHOW_ORIGINAL_INFO = u8R"(Original text will not be shown
 Only works if this extension is used directly after a translation extension)";
 const char* SIZE_LOCK = u8"Size lock";
 const char* AUTO_RESIZE_WINDOW_HEIGHT = u8"Auto resize window height";
-const char* CLICK_THROUGH = u8"Click Through";
+const char* CLICK_THROUGH = u8"Click through";
 const char* OPACITY = u8"Opacity";
 const char* BG_COLOR = u8"Background color";
 const char* TEXT_COLOR = u8"Text color";