-osd: Update slider list on demand rather than on frame updated (fixes MT08857).

-konami/konamigq.cpp: No need to cancel a newly allocated timer.

docs/source/commandline/sdlconfig.rst

@@ -62,7 +62,7 @@ SDL Keyboard Mapping
 
 
 SDL Input Options
---------------------
+-----------------
 
 .. _mame-scommandline-enabletouch:
 

src/mame/konami/konamigq.cpp

@@ -330,7 +330,6 @@ void konamigq_state::machine_start()
 	save_item(NAME(m_sound_intck));
 
 	m_dma_timer = timer_alloc(FUNC(konamigq_state::scsi_dma_transfer), this);
-	m_dma_timer->adjust(attotime::never);
 }
 
 void konamigq_state::machine_reset()

src/osd/mac/osdmac.h

@@ -68,10 +68,6 @@ public:
 
 	virtual mac_options &options() override { return m_options; }
 
-protected:
-	virtual void build_slider_list() override;
-	virtual void update_slider_list() override;
-
 private:
 	virtual void osd_exit() override;
 

src/osd/mac/window.cpp

@@ -73,30 +73,6 @@ bool mac_osd_interface::window_init()
 }
 
 
-void mac_osd_interface::update_slider_list()
-{
-	for (auto const &window : osd_common_t::window_list())
-	{
-		// check if any window has dirty sliders
-		if (window->renderer().sliders_dirty())
-		{
-			build_slider_list();
-			return;
-		}
-	}
-}
-
-void mac_osd_interface::build_slider_list()
-{
-	m_sliders.clear();
-
-	for (auto const &window : osd_common_t::window_list())
-	{
-		std::vector<ui::menu_item> window_sliders = window->renderer().get_slider_list();
-		m_sliders.insert(m_sliders.end(), window_sliders.begin(), window_sliders.end());
-	}
-}
-
 void mac_osd_interface::process_events()
 {
 }
@@ -106,6 +82,7 @@ bool mac_osd_interface::has_focus() const
 	return true;
 }
 
+
 //============================================================
 //  macwindow_exit
 //  (main thread)

src/osd/modules/lib/osdobj_common.cpp

@@ -463,9 +463,6 @@ void osd_common_t::update(bool skip_redraw)
 	//
 	if (m_watchdog != nullptr)
 		m_watchdog->reset();
-
-	update_slider_list();
-
 }
 
 
@@ -568,6 +565,31 @@ void osd_common_t::customize_input_type_list(std::vector<input_type_entry> &type
 
 std::vector<ui::menu_item> osd_common_t::get_slider_list()
 {
+	// check if any window has dirty sliders
+	bool dirty = false;
+	for (const auto &window : window_list())
+	{
+		if (window->has_renderer() && window->renderer().sliders_dirty())
+		{
+			dirty = true;
+			break;
+		}
+	}
+
+	if (dirty)
+	{
+		m_sliders.clear();
+
+		for (const auto &window : osd_common_t::window_list())
+		{
+			if (window->has_renderer())
+			{
+				std::vector<ui::menu_item> window_sliders = window->renderer().get_slider_list();
+				m_sliders.insert(m_sliders.end(), window_sliders.begin(), window_sliders.end());
+			}
+		}
+	}
+
 	return m_sliders;
 }
 

src/osd/modules/lib/osdobj_common.h

@@ -277,9 +277,6 @@ public:
 protected:
 	virtual bool input_init();
 
-	virtual void build_slider_list() { }
-	virtual void update_slider_list() { }
-
 	void poll_input_modules(bool relative_reset);
 
 	static std::list<std::unique_ptr<osd_window> > s_window_list;

src/osd/sdl/osdsdl.h

@@ -168,10 +168,6 @@ public:
 
 	virtual void process_events() override;
 
-protected:
-	virtual void build_slider_list() override;
-	virtual void update_slider_list() override;
-
 private:
 	enum
 	{

src/osd/sdl/window.cpp

@@ -111,30 +111,6 @@ bool sdl_osd_interface::window_init()
 }
 
 
-void sdl_osd_interface::update_slider_list()
-{
-	for (auto const &window : osd_common_t::window_list())
-	{
-		// check if any window has dirty sliders
-		if (window->renderer().sliders_dirty())
-		{
-			build_slider_list();
-			return;
-		}
-	}
-}
-
-void sdl_osd_interface::build_slider_list()
-{
-	m_sliders.clear();
-
-	for (auto const &window : osd_common_t::window_list())
-	{
-		std::vector<ui::menu_item> window_sliders = window->renderer().get_slider_list();
-		m_sliders.insert(m_sliders.end(), window_sliders.begin(), window_sliders.end());
-	}
-}
-
 //============================================================
 //  sdlwindow_exit
 //  (main thread)

src/osd/windows/window.cpp

@@ -146,39 +146,12 @@ bool windows_osd_interface::window_init()
 	return true;
 }
 
-void windows_osd_interface::update_slider_list()
-{
-	for (const auto &window : osd_common_t::window_list())
-	{
-		// check if any window has dirty sliders
-		if (window->has_renderer() && window->renderer().sliders_dirty())
-		{
-			build_slider_list();
-			return;
-		}
-	}
-}
 
 int windows_osd_interface::window_count()
 {
 	return osd_common_t::window_list().size();
 }
 
-void windows_osd_interface::build_slider_list()
-{
-	m_sliders.clear();
-
-	for (const auto &window : osd_common_t::window_list())
-	{
-		if (window->has_renderer())
-		{
-			// take the sliders of the first window
-			std::vector<ui::menu_item> window_sliders = window->renderer().get_slider_list();
-			m_sliders.insert(m_sliders.end(), window_sliders.begin(), window_sliders.end());
-		}
-	}
-}
-
 void windows_osd_interface::add_audio_to_recording(const int16_t *buffer, int samples_this_frame)
 {
 	auto const &window = osd_common_t::window_list().front(); // We only record on the first window
@@ -186,6 +159,7 @@ void windows_osd_interface::add_audio_to_recording(const int16_t *buffer, int sa
 		window->renderer().add_audio_to_recording(buffer, samples_this_frame);
 }
 
+
 //============================================================
 //  winwindow_exit
 //  (main thread)

src/osd/windows/winmain.h

@@ -92,10 +92,6 @@ public:
 
 	using osd_common_t::poll_input_modules; // Win32 debugger calls this directly, which it shouldn't
 
-protected:
-	virtual void build_slider_list() override;
-	virtual void update_slider_list() override;
-
 private:
 	void process_events(bool ingame, bool nodispatch);
 	virtual void osd_exit() override;