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Telegram/lib_ui/ui/widgets/rp_window.h

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include "ui/rp_widget.h"
+#include "base/flags.h"
+
+namespace style {
+struct WindowTitle;
+struct TextStyle;
+} // namespace style
+
+namespace Ui {
+namespace Platform {
+class BasicWindowHelper;
+struct HitTestRequest;
+enum class HitTestResult;
+} // namespace Platform
+
+enum class WindowTitleHitTestFlag {
+	None       = 0x00,
+	Move       = 0x01,
+	Menu       = 0x02,
+	Maximize   = 0x04,
+	FullScreen = 0x08,
+};
+inline constexpr bool is_flag_type(WindowTitleHitTestFlag) {
+	return true;
+}
+using WindowTitleHitTestFlags = base::flags<WindowTitleHitTestFlag>;
+
+class RpWindow : public RpWidget {
+public:
+	explicit RpWindow(QWidget *parent = nullptr);
+	~RpWindow();
+
+	[[nodiscard]] not_null<RpWidget*> body();
+	[[nodiscard]] not_null<const RpWidget*> body() const;
+	[[nodiscard]] QMargins frameMargins() const;
+
+	// In Windows 11 the window rounding shadow takes about
+	// round(1px * system_scale) from the window geometry on each side.
+	//
+	// Top shift is made by the TitleWidget height, but the rest of the
+	// side shifts are left for the RpWindow client to consider.
+	[[nodiscard]] int additionalContentPadding() const;
+	[[nodiscard]] rpl::producer<int> additionalContentPaddingValue() const;
+
+	[[nodiscard]] auto hitTestRequests() const
+		-> rpl::producer<not_null<Platform::HitTestRequest*>>;
+	[[nodiscard]] auto systemButtonOver() const
+		-> rpl::producer<Platform::HitTestResult>;
+	[[nodiscard]] auto systemButtonDown() const
+		-> rpl::producer<Platform::HitTestResult>;
+	void overrideSystemButtonOver(Platform::HitTestResult button);
+	void overrideSystemButtonDown(Platform::HitTestResult button);
+
+	void setTitle(const QString &title);
+	void setTitleStyle(const style::WindowTitle &st);
+	void setNativeFrame(bool enabled);
+	void setMinimumSize(QSize size);
+	void setFixedSize(QSize size);
+	void setStaysOnTop(bool enabled);
+	void setGeometry(QRect rect);
+	void showFullScreen();
+	void showNormal();
+	void close();
+	[[nodiscard]] int manualRoundingRadius() const;
+	void setBodyTitleArea(Fn<WindowTitleHitTestFlags(QPoint)> testMethod);
+
+	// Check if MouseButtonRelease was from the pressed state being
+	// cancelled by startSystemMove / startSystemResize call.
+	[[nodiscard]] bool mousePressCancelled() const;
+
+	[[nodiscard]] const style::TextStyle &titleTextStyle() const;
+
+private:
+	const std::unique_ptr<Platform::BasicWindowHelper> _helper;
+
+};
+
+} // namespace Ui