New option: First keypress enables backlight only. Patch #2920 by Nicolas Pennequin.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9228 a1c6a512-1295-4272-9138-f99709370657

apps/lang/english.lang

@@ -3832,3 +3832,9 @@ desc: "pitch" in the pitch screen
 eng: "Pitch"
 voice: "Pitch"
 new:
+
+id: LANG_BACKLIGHT_FILTER_FIRST_KEYPRESS
+desc: Backlight behaviour setting
+eng: "First keypress enables backlight only"
+voice: "First keypress enables backlight only"
+new:

apps/settings.c

@@ -294,6 +294,14 @@ static const struct bit_entry rtc_bits[] =
 #ifdef HAVE_REMOTE_LCD_TICKING
     {1, S_O(remote_reduce_ticking), false, "remote reduce ticking", off_on },
 #endif
+#endif
+
+#ifdef CONFIG_BACKLIGHT
+#ifdef HAVE_LCD_COLOR
+    {1, S_O(bl_filter_first_keypress), true, "backlight filters first keypress", off_on },
+#else
+    {1, S_O(bl_filter_first_keypress), false, "backlight filters first keypress", off_on },
+#endif
 #endif
 
     /* new stuff to be added here */
@@ -1115,6 +1123,10 @@ void settings_apply(void)
 #ifdef HAVE_SPDIF_POWER
     spdif_power_enable(global_settings.spdif_enable);
 #endif
+
+#ifdef CONFIG_BACKLIGHT
+    set_backlight_filter_keypress(global_settings.bl_filter_first_keypress);
+#endif
 }
 
 

apps/settings.h

@@ -472,6 +472,10 @@ struct user_settings
     int fg_color; /* foreground color native format */
 #endif
     bool party_mode;	/* party mode - unstoppable music */
+    
+#ifdef CONFIG_BACKLIGHT
+    bool bl_filter_first_keypress;   /* filter first keypress when dark? */
+#endif
 };
 
 enum optiontype { INT, BOOL };

apps/settings_menu.c

@@ -1046,6 +1046,15 @@ static bool set_party_mode(void)
     return set_bool( str(LANG_PARTY_MODE), &global_settings.party_mode );
 }
 
+#ifdef CONFIG_BACKLIGHT
+static bool set_bl_filter_first_keypress(void)
+{
+    bool result = set_bool( str(LANG_BACKLIGHT_FILTER_FIRST_KEYPRESS), 
+                            &global_settings.bl_filter_first_keypress );
+    set_backlight_filter_keypress(global_settings.bl_filter_first_keypress);
+    return result;
+}
+#endif 
 
 static bool ff_rewind_accel(void) 
 { 
@@ -1621,6 +1630,7 @@ static bool lcd_settings_menu(void)
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
         { ID2P(LANG_BRIGHTNESS), brightness },
 #endif
+        { ID2P(LANG_BACKLIGHT_FILTER_FIRST_KEYPRESS), set_bl_filter_first_keypress },
 #endif /* CONFIG_BACKLIGHT */
         { ID2P(LANG_CONTRAST),        contrast },
 #ifdef HAVE_LCD_BITMAP

firmware/backlight.c

@@ -522,6 +522,14 @@ void backlight_off(void)
     queue_post(&backlight_queue, BACKLIGHT_OFF, NULL);
 }
 
+bool is_backlight_on(void)
+{
+    if (backlight_timer || !backlight_get_current_timeout())
+        return true;
+    else
+        return false;
+}
+
 /* return value in ticks; 0 means always on, <0 means always off */
 int backlight_get_current_timeout(void)
 {

firmware/drivers/button.c

@@ -52,6 +52,9 @@ static long last_read; /* Last button status, for debouncing/filtering */
 #ifdef HAVE_LCD_BITMAP
 static bool flipped;  /* buttons can be flipped to match the LCD flip */
 #endif
+#ifdef CONFIG_BACKLIGHT
+static bool filter_first_keypress;
+#endif
 
 /* how often we check to see if a button is pressed */
 #define POLL_FREQUENCY    HZ/100
@@ -504,6 +507,9 @@ static void button_tick(void)
                     }
                     else
                     {
+#ifdef CONFIG_BACKLIGHT
+                        if ( !filter_first_keypress || is_backlight_on())
+#endif
                             queue_post(&button_queue, btn, NULL);
                         post = false;
                     }
@@ -629,6 +635,9 @@ void button_init(void)
 #ifdef HAVE_LCD_BITMAP
     flipped = false;
 #endif
+#ifdef CONFIG_BACKLIGHT
+    filter_first_keypress = false;
+#endif
 }
 
 #ifdef HAVE_LCD_BITMAP /* only bitmap displays can be flipped */
@@ -687,6 +696,13 @@ void button_set_flip(bool flip)
 }
 #endif /* HAVE_LCD_BITMAP */
 
+#ifdef CONFIG_BACKLIGHT
+void set_backlight_filter_keypress(bool value)
+{
+    filter_first_keypress = value;
+}
+#endif
+
 /*
  Archos hardware button hookup
  =============================

firmware/export/backlight.h

@@ -21,6 +21,7 @@
 
 #include "config.h"
 
+bool is_backlight_on(void);
 void backlight_on(void);
 void backlight_off(void);
 void backlight_set_timeout(int index);

firmware/export/button.h

@@ -42,6 +42,9 @@ void button_clear_queue(void);
 #ifdef HAVE_LCD_BITMAP
 void button_set_flip(bool flip); /* turn 180 degrees */
 #endif
+#ifdef CONFIG_BACKLIGHT
+void set_backlight_filter_keypress(bool value);
+#endif
 
 #ifdef HAS_BUTTON_HOLD
 bool button_hold(void);

uisimulator/sdl/button.c

@@ -37,6 +37,15 @@ struct event_queue button_queue;
 
 static int btn = 0;    /* Hopefully keeps track of currently pressed keys... */
 
+#ifdef CONFIG_BACKLIGHT
+static bool filter_first_keypress;
+
+void set_backlight_filter_keypress(bool value)
+{
+    filter_first_keypress = value;
+}
+#endif
+
 void button_event(int key, bool pressed)
 {
     int new_btn = 0;
@@ -219,6 +228,9 @@ void button_event(int key, bool pressed)
                 }
                 else
                 {
+#ifdef CONFIG_BACKLIGHT
+                    if ( !filter_first_keypress || is_backlight_on())
+#endif
                         queue_post(&button_queue, btn, NULL);
                     post = false;
                 }