setup: Allow backspace or del to clear controls.

Backspace or delete clears other input boxes; make it do the same for
keyboard, mouse and joystick inputs.

3 files changed, 19 insertions, 4 deletions

diff --git a/src/setup/txt_joybinput.c b/src/setup/txt_joybinput.c
index 4e41f3fd..f431690b 100644
--- a/src/setup/txt_joybinput.c
+++ b/src/setup/txt_joybinput.c
@@ -161,11 +161,11 @@ static void TXT_JoystickInputDestructor(TXT_UNCAST_ARG(joystick_input))
 {
 }
 
-static int TXT_JoystickInputKeyPress(TXT_UNCAST_ARG(joystick_input), int joystick)
+static int TXT_JoystickInputKeyPress(TXT_UNCAST_ARG(joystick_input), int key)
 {
     TXT_CAST_ARG(txt_joystick_input_t, joystick_input);
 
-    if (joystick == KEY_ENTER)
+    if (key == KEY_ENTER)
     {
         // Open a window to prompt for the new joystick press
 
@@ -174,6 +174,11 @@ static int TXT_JoystickInputKeyPress(TXT_UNCAST_ARG(joystick_input), int joystic
         return 1;
     }
 
+    if (key == KEY_BACKSPACE || key == KEY_DEL)
+    {
+        *joystick_input->variable = -1;
+    }
+
     return 0;
 }
 
diff --git a/src/setup/txt_keyinput.c b/src/setup/txt_keyinput.c
index a35f22e1..60fae1bf 100644
--- a/src/setup/txt_keyinput.c
+++ b/src/setup/txt_keyinput.c
@@ -146,6 +146,11 @@ static int TXT_KeyInputKeyPress(TXT_UNCAST_ARG(key_input), int key)
         return 1;
     }
 
+    if (key == KEY_BACKSPACE || key == KEY_DEL)
+    {
+        *key_input->variable = 0;
+    }
+
     return 0;
 }
 
diff --git a/src/setup/txt_mouseinput.c b/src/setup/txt_mouseinput.c
index aec7d5d9..a966c10f 100644
--- a/src/setup/txt_mouseinput.c
+++ b/src/setup/txt_mouseinput.c
@@ -125,11 +125,11 @@ static void TXT_MouseInputDestructor(TXT_UNCAST_ARG(mouse_input))
 {
 }
 
-static int TXT_MouseInputKeyPress(TXT_UNCAST_ARG(mouse_input), int mouse)
+static int TXT_MouseInputKeyPress(TXT_UNCAST_ARG(mouse_input), int key)
 {
     TXT_CAST_ARG(txt_mouse_input_t, mouse_input);
 
-    if (mouse == KEY_ENTER)
+    if (key == KEY_ENTER)
     {
         // Open a window to prompt for the new mouse press
 
@@ -138,6 +138,11 @@ static int TXT_MouseInputKeyPress(TXT_UNCAST_ARG(mouse_input), int mouse)
         return 1;
     }
 
+    if (key == KEY_BACKSPACE || key == KEY_DEL)
+    {
+        *mouse_input->variable = -1;
+    }
+
     return 0;
 }