Fix Windows 11 title controls by additional padding.

ui/platform/win/ui_window_title_win.cpp

@@ -6,9 +6,13 @@
 //
 #include "ui/platform/win/ui_window_title_win.h"
 
+#include "ui/platform/win/ui_window_win.h"
 #include "ui/widgets/buttons.h"
 #include "ui/widgets/shadow.h"
 #include "ui/ui_utility.h"
+#include "base/platform/base_platform_info.h"
+#include "base/platform/win/base_windows_safe_library.h"
+#include "base/debug_log.h"
 #include "styles/style_widgets.h"
 #include "styles/palette.h"
 
@@ -16,28 +20,75 @@
 #include <QtGui/QtEvents>
 #include <QtGui/QWindow>
 
+#include <windows.h>
+#include <shellscalingapi.h>
+
 namespace Ui {
 namespace Platform {
+namespace {
+
+HRESULT(__stdcall *GetScaleFactorForMonitor)(
+	_In_ HMONITOR hMon,
+	_Out_ DEVICE_SCALE_FACTOR *pScale);
+
+[[nodiscard]] bool ScaleQuerySupported() {
+	static const auto Result = [&] {
+#define LOAD_SYMBOL(lib, name) base::Platform::LoadMethod(lib, #name, name)
+		const auto shcore = base::Platform::SafeLoadLibrary(L"Shcore.dll");
+		return LOAD_SYMBOL(shcore, GetScaleFactorForMonitor);
+#undef LOAD_SYMBOL
+	}();
+	return Result;
+}
+
+} // namespace
+
+struct TitleWidget::PaddingHelper {
+	explicit PaddingHelper(QWidget *parent) : controlsParent(parent) {
+	}
+
+	RpWidget controlsParent;
+	int padding = 0;
+};
 
 TitleWidget::TitleWidget(not_null<RpWidget*> parent)
 : RpWidget(parent)
-, _controls(this, st::defaultWindowTitle)
+, _paddingHelper(CheckTitlePaddingRequired()
+	? std::make_unique<PaddingHelper>(this)
+	: nullptr)
+, _controls(
+	_paddingHelper ? &_paddingHelper->controlsParent : this,
+	st::defaultWindowTitle)
 , _shadow(this, st::titleShadow) {
 	setAttribute(Qt::WA_OpaquePaintEvent);
 
 	parent->widthValue(
 	) | rpl::start_with_next([=](int width) {
-		setGeometry(0, 0, width, _controls.st()->height);
+		refreshGeometryWithWidth(width);
 	}, lifetime());
 }
 
+TitleWidget::~TitleWidget() = default;
+
 void TitleWidget::setText(const QString &text) {
 	window()->setWindowTitle(text);
 }
 
 void TitleWidget::setStyle(const style::WindowTitle &st) {
 	_controls.setStyle(st);
-	setGeometry(0, 0, window()->width(), _controls.st()->height);
+	refreshGeometryWithWidth(window()->width());
+}
+
+void TitleWidget::refreshGeometryWithWidth(int width) {
+	const auto add = _paddingHelper ? _paddingHelper->padding : 0;
+	setGeometry(0, 0, width, _controls.st()->height + add);
+	if (_paddingHelper) {
+		_paddingHelper->controlsParent.setGeometry(
+			add,
+			add,
+			width - 2 * add,
+			_controls.st()->height);
+	}
 	update();
 }
 
@@ -57,7 +108,8 @@ void TitleWidget::paintEvent(QPaintEvent *e) {
 }
 
 void TitleWidget::resizeEvent(QResizeEvent *e) {
-	_shadow->setGeometry(0, height() - st::lineWidth, width(), st::lineWidth);
+	const auto thickness = st::lineWidth;
+	_shadow->setGeometry(0, height() - thickness, width(), thickness);
 }
 
 HitTestResult TitleWidget::hitTest(QPoint point) const {
@@ -69,5 +121,99 @@ HitTestResult TitleWidget::hitTest(QPoint point) const {
 	return HitTestResult::None;
 }
 
+bool TitleWidget::additionalPaddingRequired() const {
+	return _paddingHelper && !isHidden();
+}
+
+void TitleWidget::refreshAdditionalPaddings() {
+	if (!additionalPaddingRequired()) {
+		return;
+	}
+	const auto handle = GetWindowHandle(this);
+	if (!handle) {
+		LOG(("System Error: GetWindowHandle failed."));
+		return;
+	}
+	refreshAdditionalPaddings(handle);
+}
+
+void TitleWidget::refreshAdditionalPaddings(HWND handle) {
+	if (!additionalPaddingRequired()) {
+		return;
+	}
+	auto placement = WINDOWPLACEMENT{
+		.length = sizeof(WINDOWPLACEMENT),
+	};
+	if (!GetWindowPlacement(handle, &placement)) {
+		LOG(("System Error: GetWindowPlacement failed."));
+		return;
+	}
+	refreshAdditionalPaddings(handle, placement);
+}
+
+void TitleWidget::refreshAdditionalPaddings(
+		HWND handle,
+		const WINDOWPLACEMENT &placement) {
+	auto geometry = RECT();
+	if (!GetWindowRect(handle, &geometry)) {
+		LOG(("System Error: GetWindowRect failed."));
+		return;
+	}
+	const auto normal = placement.rcNormalPosition;
+	const auto rounded = (normal.left == geometry.left)
+		&& (normal.right == geometry.right)
+		&& (normal.top == geometry.top)
+		&& (normal.bottom == geometry.bottom);
+	const auto padding = [&] {
+		if (!rounded) {
+			return 0;
+		}
+		const auto monitor = MonitorFromWindow(
+			handle,
+			MONITOR_DEFAULTTONEAREST);
+		if (!monitor) {
+			LOG(("System Error: MonitorFromWindow failed."));
+			return -1;
+		}
+		auto factor = DEVICE_SCALE_FACTOR();
+		if (!SUCCEEDED(GetScaleFactorForMonitor(monitor, &factor))) {
+			LOG(("System Error: GetScaleFactorForMonitor failed."));
+			return -1;
+		} else if (factor < 100 || factor > 500) {
+			LOG(("System Error: Bad scale factor %1.").arg(int(factor)));
+			return -1;
+		}
+		const auto pixels = (factor + 50) / 100;
+		return int(base::SafeRound(pixels / window()->devicePixelRatioF()));
+	}();
+	if (padding < 0) {
+		return;
+	}
+	setAdditionalPadding(padding);
+}
+
+void TitleWidget::setAdditionalPadding(int padding) {
+	Expects(_paddingHelper != nullptr);
+
+	if (_paddingHelper->padding == padding) {
+		return;
+	}
+	_paddingHelper->padding = padding;
+	refreshGeometryWithWidth(window()->width());
+}
+
+void TitleWidget::setVisibleHook(bool visible) {
+	RpWidget::setVisibleHook(visible);
+	if (additionalPaddingRequired()) {
+		PostponeCall(this, [=] {
+			refreshAdditionalPaddings();
+		});
+	}
+}
+
+bool CheckTitlePaddingRequired() {
+	return ::Platform::IsWindows11OrGreater() && ScaleQuerySupported();
+}
+
 } // namespace Platform
 } // namespace Ui

ui/platform/win/ui_window_title_win.h

@@ -13,6 +13,8 @@
 #include <QtCore/QRect>
 #include <QtCore/QPoint>
 
+#include <Windows.h> // HWND, WINDOWPLACEMENT
+
 namespace style {
 struct WindowTitle;
 } // namespace style
@@ -42,6 +44,7 @@ enum class HitTestResult {
 class TitleWidget : public RpWidget {
 public:
 	explicit TitleWidget(not_null<RpWidget*> parent);
+	~TitleWidget();
 
 	void setText(const QString &text);
 	void setStyle(const style::WindowTitle &st);
@@ -49,15 +52,32 @@ public:
 	[[nodiscard]] HitTestResult hitTest(QPoint point) const;
 	void setResizeEnabled(bool enabled);
 
+	void refreshAdditionalPaddings();
+	void refreshAdditionalPaddings(HWND handle);
+	void refreshAdditionalPaddings(
+		HWND handle,
+		const WINDOWPLACEMENT &placement);
+
 protected:
 	void paintEvent(QPaintEvent *e) override;
 	void resizeEvent(QResizeEvent *e) override;
 
+	void setVisibleHook(bool visible) override;
+
 private:
+	struct PaddingHelper;
+
+	[[nodiscard]] bool additionalPaddingRequired() const;
+	void refreshGeometryWithWidth(int width);
+	void setAdditionalPadding(int padding);
+
+	std::unique_ptr<PaddingHelper> _paddingHelper;
 	TitleControls _controls;
 	object_ptr<Ui::PlainShadow> _shadow;
 
 };
 
+[[nodiscard]] bool CheckTitlePaddingRequired();
+
 } // namespace Platform
 } // namespace Ui

ui/platform/win/ui_window_win.cpp

@@ -9,7 +9,6 @@
 #include "ui/inactive_press.h"
 #include "ui/platform/win/ui_window_title_win.h"
 #include "base/platform/base_platform_info.h"
-#include "base/platform/win/base_windows_safe_library.h"
 #include "base/integration.h"
 #include "base/debug_log.h"
 #include "styles/palette.h"
@@ -409,11 +408,16 @@ bool WindowHelper::handleNativeEvent(
 	case WM_WINDOWPOSCHANGING:
 	case WM_WINDOWPOSCHANGED: {
 		if (_shadow) {
-			WINDOWPLACEMENT wp;
-			wp.length = sizeof(WINDOWPLACEMENT);
-			if (GetWindowPlacement(_handle, &wp)
-				&& (wp.showCmd == SW_SHOWMAXIMIZED
-					|| wp.showCmd == SW_SHOWMINIMIZED)) {
+			auto placement = WINDOWPLACEMENT{
+				.length = sizeof(WINDOWPLACEMENT),
+			};
+			if (!GetWindowPlacement(_handle, &placement)) {
+				LOG(("System Error: GetWindowPlacement failed."));
+				return false;
+			}
+			_title->refreshAdditionalPaddings(_handle, placement);
+			if (placement.showCmd == SW_SHOWMAXIMIZED
+				|| placement.showCmd == SW_SHOWMINIMIZED) {
 				_shadow->update(WindowShadow::Change::Hidden);
 			} else {
 				_shadow->update(
@@ -439,6 +443,7 @@ bool WindowHelper::handleNativeEvent(
 			}
 			updateMargins();
 			if (_shadow) {
+				_title->refreshAdditionalPaddings(_handle);
 				const auto changes = (wParam == SIZE_MINIMIZED
 					|| wParam == SIZE_MAXIMIZED)
 					? WindowShadow::Change::Hidden
@@ -462,6 +467,7 @@ bool WindowHelper::handleNativeEvent(
 
 	case WM_MOVE: {
 		if (_shadow) {
+			_title->refreshAdditionalPaddings(_handle);
 			_shadow->update(WindowShadow::Change::Moved);
 		}
 	} return false;