# HG changeset patch
# User sbr <sebastien@brissaud.name>
# Date 1375201180 -7200
#      Tue Jul 30 18:19:40 2013 +0200
# Node ID f467cd5ef652eda5e105bf59a14936e48598126d
# Parent  c2901bee83cb7422cf9375fae4dec5b616caa78d
-Add: a window keycode for the '+' key.

A new WindowKeyCode WKC_PLUS is declared and is mapped to the video driver keycodes for SDL, Allegro and Win32.

SDL provides SDLK_PLUS as scancode for the '+' key (http://www.libsdl.org/docs/html/sdlkey.html).

No scancode for '+' exists in the Allegro driver (https://www.allegro.cc/manual/4/api/keyboard-routines/key).
The unicode representation of '+' is tested before the scancode mapping loop.

Win32 provide 0xBB (VK_OEM_PLUS) as scancode for the '+' key (http://www.kbdedit.com/manual/low_level_vk_list.html).
I have no Windows computer and thus haven't tested the Win32 mapping.

diff --git a/src/gfx_type.h b/src/gfx_type.h
--- a/src/gfx_type.h
+++ b/src/gfx_type.h
@@ -104,6 +104,7 @@ enum WindowKeyCodes {
 	WKC_COMMA       = 151, ///< , Comma
 	WKC_PERIOD      = 152, ///< . Period
 	WKC_MINUS       = 153, ///< - Minus
+	WKC_PLUS        = 154, ///< + Plus
 };
 
 /** A single sprite of a list of animated cursors */
diff --git a/src/video/allegro_v.cpp b/src/video/allegro_v.cpp
--- a/src/video/allegro_v.cpp
+++ b/src/video/allegro_v.cpp
@@ -312,10 +312,16 @@ static uint32 ConvertAllegroKeyIntoMy()
 	const VkMapping *map;
 	uint key = 0;
 
-	for (map = _vk_mapping; map != endof(_vk_mapping); ++map) {
-		if ((uint)(scancode - map->vk_from) <= map->vk_count) {
-			key = scancode - map->vk_from + map->map_to;
-			break;
+	if (unicode == (int)'+') {
+		/* No scancode for '+' in allegro, tests the unicode representation. */
+		key = WKC_PLUS;
+	} else {
+		 /* Use allegro scancodes. */
+		for (map = _vk_mapping; map != endof(_vk_mapping); ++map) {
+			if ((uint)(scancode - map->vk_from) <= map->vk_count) {
+				key = scancode - map->vk_from + map->map_to;
+				break;
+			}
 		}
 	}
 
diff --git a/src/video/sdl_v.cpp b/src/video/sdl_v.cpp
--- a/src/video/sdl_v.cpp
+++ b/src/video/sdl_v.cpp
@@ -492,7 +492,8 @@ static const VkMapping _vk_mapping[] = {
 	AS(SDLK_QUOTE,   WKC_SINGLEQUOTE),
 	AS(SDLK_COMMA,   WKC_COMMA),
 	AS(SDLK_MINUS,   WKC_MINUS),
-	AS(SDLK_PERIOD,  WKC_PERIOD)
+	AS(SDLK_PERIOD,  WKC_PERIOD),
+	AS(SDLK_PLUS,    WKC_PLUS),
 };
 
 static uint32 ConvertSdlKeyIntoMy(SDL_keysym *sym)
diff --git a/src/video/win32_v.cpp b/src/video/win32_v.cpp
--- a/src/video/win32_v.cpp
+++ b/src/video/win32_v.cpp
@@ -149,7 +149,8 @@ static const VkMapping _vk_mapping[] = {
 	AS(0xDE,  WKC_SINGLEQUOTE),
 	AS(0xBC,  WKC_COMMA),
 	AS(0xBD,  WKC_MINUS),
-	AS(0xBE,  WKC_PERIOD)
+	AS(0xBE,  WKC_PERIOD),
+	AS(0xBB,  WKC_PLUS), // VK_OEM_PLUS
 };
 
 static uint MapWindowsKey(uint sym)