Xduoo X3 Add tree scrolling FS#13240, Emulate Multibutton presses

Fixes deficiencies with the button system on the X3

  The x3 has an interesting button layout.
  Multiple key presses are NOT supported unless
  [BUTTON_POWER] is one of the combined keys

  As you can imagine this causes problems as the power button takes
  precedence in the button system and initiates a shutdown if the
  key is held too long
  instead of BUTTON_POWER use BUTTON_PWRALT in combination with other keys
  IF using as a prerequsite button then BUTTON_POWER should be used

  Multiple buttons are emulated by button_read_device but there are a few
  caveats to be aware of:

  Button Order Matters!
   different keys have different priorities, higher priority keys 'overide'
   the lower priority keys
  VOLUP[7] VOLDN[6] PREV[5] NEXT[4] PLAY[3] OPTION[2] HOME[1]

  There will be no true release or repeat events, the user can let off the
   button pressed initially and it will still continue to appear to be
   pressed as long as the second key is held

Tree scrolling is PLAY+NEXT or PLAY+PREV

Change-Id: I88dfee1c70a6a99659e8227f5becacc50cc43910

1 files changed, 40 insertions, 4 deletions

diff --git a/apps/keymaps/keymap-xduoox3.c b/apps/keymaps/keymap-xduoox3.c
index e73798d4fe..ed217fd722 100644
--- a/apps/keymaps/keymap-xduoox3.c
+++ b/apps/keymaps/keymap-xduoox3.c
@@ -21,6 +21,29 @@
 
 /* Button Code Definitions for xDuoo X3 target */
 
+
+/* NOTE X3 Button system
+ * The x3 has an interesting button layout. Multiple key presses are
+ * NOT supported unless [BUTTON_POWER] is one of the combined keys
+ * as you can imagine this causes problems as the power button takes
+ * precedence in the button system and initiates a shutdown if the
+ * key is held too long
+ * instead of BUTTON_POWER use BUTTON_PWRALT in combination with other keys
+ * IF using as a prerequsite button then BUTTON_POWER should be used
+ *
+ * Multiple buttons are emulated by button_read_device but there are a few
+ * caveats to be aware of:
+ *
+ * Button Order Matters!
+ *  different keys have different priorities, higher priority keys 'overide' the
+ *  lower priority keys
+ * VOLUP[7] VOLDN[6] PREV[5] NEXT[4] PLAY[3] OPTION[2] HOME[1]
+ *
+ * There will be no true release or repeat events, the user can let off the button
+ *  pressed initially and it will still continue to appear to be pressed as long as
+ *  the second key is held
+ * */
+
 #include "config.h"
 #include "action.h"
 #include "button.h"
@@ -67,9 +90,9 @@ static const struct button_mapping button_context_wps[] = {
     { ACTION_WPS_QUICKSCREEN, BUTTON_OPTION|BUTTON_REPEAT,      BUTTON_OPTION },
     { ACTION_WPS_HOTKEY,      BUTTON_HOME|BUTTON_REPEAT,        BUTTON_HOME },
 
-    { ACTION_WPS_ABSETB_NEXTDIR,    BUTTON_POWER|BUTTON_NEXT,   BUTTON_POWER },
-    { ACTION_WPS_ABSETA_PREVDIR,    BUTTON_POWER|BUTTON_PREV,   BUTTON_POWER },
-    { ACTION_WPS_ABRESET,           BUTTON_POWER|BUTTON_PLAY,   BUTTON_POWER },
+    { ACTION_WPS_ABSETB_NEXTDIR,    BUTTON_PWRALT|BUTTON_NEXT,   BUTTON_POWER },
+    { ACTION_WPS_ABSETA_PREVDIR,    BUTTON_PWRALT|BUTTON_PREV,   BUTTON_POWER },
+    { ACTION_WPS_ABRESET,           BUTTON_PWRALT|BUTTON_PLAY,   BUTTON_POWER },
 
     LAST_ITEM_IN_LIST
 }; /* button_context_wps */
@@ -173,11 +196,21 @@ static const struct button_mapping button_context_settings_vol_is_inc[] = {
 static const struct button_mapping button_context_tree[] = {
     { ACTION_TREE_WPS,        BUTTON_POWER|BUTTON_REL,          BUTTON_POWER },
     { ACTION_TREE_STOP,       BUTTON_POWER|BUTTON_REPEAT,       BUTTON_POWER },
-    { ACTION_TREE_HOTKEY,     BUTTON_HOME|BUTTON_REPEAT,        BUTTON_HOME },
+    { ACTION_TREE_HOTKEY,     BUTTON_HOME|BUTTON_REPEAT,        BUTTON_HOME},
 
     LAST_ITEM_IN_LIST__NEXTLIST(CONTEXT_LIST)
 }; /* button_context_tree */
 
+static const struct button_mapping button_context_listtree_scroll_with_combo[]  = {
+    { ACTION_NONE,           BUTTON_POWER,                             BUTTON_NONE },
+    { ACTION_TREE_PGLEFT,    BUTTON_PLAY|BUTTON_PREV,               BUTTON_NONE },
+    { ACTION_TREE_PGLEFT,    BUTTON_PLAY|BUTTON_PREV|BUTTON_REPEAT, BUTTON_NONE },
+    { ACTION_TREE_PGRIGHT,   BUTTON_PLAY|BUTTON_NEXT,                 BUTTON_NONE },
+    { ACTION_TREE_PGRIGHT,   BUTTON_PLAY|BUTTON_NEXT|BUTTON_REPEAT,   BUTTON_NONE },
+
+    LAST_ITEM_IN_LIST__NEXTLIST(CONTEXT_CUSTOM|CONTEXT_TREE),
+}; /* button_context_listtree_scroll_with_combo */
+
 /** Yes/No Screen **/
 static const struct button_mapping button_context_yesnoscreen[] = {
     { ACTION_YESNO_ACCEPT,    BUTTON_PLAY,                      BUTTON_NONE },
@@ -256,8 +289,11 @@ const struct button_mapping* get_context_mapping(int context)
         case CONTEXT_SETTINGS_RECTRIGGER:
             return button_context_settings_vol_is_inc;
         case CONTEXT_TREE:
+                return button_context_listtree_scroll_with_combo;
         case CONTEXT_MAINMENU:
             return button_context_tree;
+        case CONTEXT_CUSTOM|CONTEXT_TREE:
+            return button_context_tree;
         case CONTEXT_WPS:
             return button_context_wps;
         case CONTEXT_YESNOSCREEN: