latest SDK

foobar2000/helpers/win32_dialog.h

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+#pragma once
+
+#ifdef FOOBAR2000_DESKTOP_WINDOWS
+
+//DEPRECATED dialog helpers - kept only for compatibility with old code - do not use in new code, use WTL instead.
+
+namespace dialog_helper
+{
+	
+	class dialog
+	{
+	protected:
+		
+		dialog() : wnd(0), m_is_modal(false) {}
+		~dialog() { }
+
+		virtual BOOL on_message(UINT msg,WPARAM wp,LPARAM lp)=0;
+
+		void end_dialog(int code);
+
+	public:
+		inline HWND get_wnd() {return wnd;}
+
+		__declspec(deprecated) int run_modal(unsigned id,HWND parent);
+
+		__declspec(deprecated) HWND run_modeless(unsigned id,HWND parent);
+	private:
+		HWND wnd;
+		static INT_PTR CALLBACK DlgProc(HWND wnd,UINT msg,WPARAM wp,LPARAM lp);
+
+		bool m_is_modal;
+
+		modal_dialog_scope m_modal_scope;
+	};
+
+	//! This class is meant to be instantiated on-stack, as a local variable. Using new/delete operators instead or even making this a member of another object works, but does not make much sense because of the way this works (single run() call).
+	class dialog_modal
+	{
+	public:
+		__declspec(deprecated) int run(unsigned p_id,HWND p_parent,HINSTANCE p_instance = core_api::get_my_instance());
+	protected:
+		virtual BOOL on_message(UINT msg,WPARAM wp,LPARAM lp)=0;
+
+		inline dialog_modal() : m_wnd(0) {}
+		void end_dialog(int p_code);
+		inline HWND get_wnd() const {return m_wnd;}
+	private:
+		static INT_PTR CALLBACK DlgProc(HWND wnd,UINT msg,WPARAM wp,LPARAM lp);
+
+		HWND m_wnd;
+		modal_dialog_scope m_modal_scope;
+	};
+
+	//! This class is meant to be used with new/delete operators only. Destroying the window - outside create() / WM_INITDIALOG - will result in object calling delete this. If object is deleted directly using delete operator, WM_DESTROY handler may not be called so it should not be used (use destructor of derived class instead).
+	//! Classes derived from dialog_modeless must not be instantiated in any other way than operator new().
+	/*! Typical usage : \n
+	class mydialog : public dialog_helper::dialog_modeless {...};
+	(...)
+	bool createmydialog()
+	{
+		mydialog * instance = new mydialog;
+		if (instance == 0) return flase;
+		if (!instance->create(...)) {delete instance; return false;}
+		return true;
+	}
+
+	*/
+	class dialog_modeless
+	{
+	public:
+		//! Creates the dialog window. This will call on_message with WM_INITDIALOG. To abort creation, you can call DestroyWindow() on our window; it will not delete the object but make create() return false instead. You should not delete the object from inside WM_INITDIALOG handler or anything else possibly called from create().
+		//! @returns true on success, false on failure.
+		__declspec(deprecated) bool create(unsigned p_id,HWND p_parent,HINSTANCE p_instance = core_api::get_my_instance());
+	protected:
+		//! Standard windows message handler (DialogProc-style). Use get_wnd() to retrieve our dialog window handle.
+		virtual BOOL on_message(UINT msg,WPARAM wp,LPARAM lp)=0;
+
+		inline dialog_modeless() : m_wnd(0), m_destructor_status(destructor_none), m_is_in_create(false) {}
+		inline HWND get_wnd() const {return m_wnd;}
+		virtual ~dialog_modeless();
+	private:
+		static INT_PTR CALLBACK DlgProc(HWND wnd,UINT msg,WPARAM wp,LPARAM lp);
+		void on_window_destruction();
+		
+		BOOL on_message_wrap(UINT msg,WPARAM wp,LPARAM lp);
+
+		HWND m_wnd;
+		enum {destructor_none,destructor_normal,destructor_fromwindow} m_destructor_status;
+		bool m_is_in_create;
+	};
+
+
+	class dialog_modeless_v2
+	{
+	protected:
+		__declspec(deprecated) explicit dialog_modeless_v2(unsigned p_id,HWND p_parent,HINSTANCE p_instance = core_api::get_my_instance(),bool p_stealfocus = true);
+		virtual ~dialog_modeless_v2();
+		HWND get_wnd() const {return m_wnd;}
+		virtual BOOL on_message(UINT msg,WPARAM wp,LPARAM lp) {return FALSE;}
+
+		static dialog_modeless_v2 * __unsafe__instance_from_window(HWND p_wnd) {return reinterpret_cast<dialog_modeless_v2*>(GetWindowLongPtr(p_wnd,DWLP_USER));}
+	private:
+		static INT_PTR CALLBACK DlgProc(HWND wnd,UINT msg,WPARAM wp,LPARAM lp);
+		void detach_window();
+		BOOL on_message_internal(UINT msg,WPARAM wp,LPARAM lp);
+		enum {status_construction, status_lifetime, status_destruction_requested, status_destruction} m_status;
+		HWND m_wnd;
+		const bool m_stealfocus;
+
+		const dialog_modeless_v2 & operator=(const dialog_modeless_v2 &);
+		dialog_modeless_v2(const dialog_modeless_v2 &);
+	};
+
+};
+
+//! Wrapper (provided mainly for old code), simplifies parameters compared to standard CreateDialog() by using core_api::get_my_instance().
+HWND uCreateDialog(UINT id,HWND parent,DLGPROC proc,LPARAM param = 0);
+//! Wrapper (provided mainly for old code), simplifies parameters compared to standard DialogBox() by using core_api::get_my_instance().
+int uDialogBox(UINT id,HWND parent,DLGPROC proc,LPARAM param = 0);
+
+
+#endif // FOOBAR2000_DESKTOP_WINDOWS