From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Thu, 29 Dec 2011 14:38:46 +0000 (+0100)
Subject: Implement peeking previous position in WinBoard
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=82b4e616032702ec6e09b7b07d14a2275196f574;p=xboard.git

Implement peeking previous position in WinBoard

The backspace key is used to temporarily display the previous position.
---

diff --git a/winboard/jaws.c b/winboard/jaws.c
index d5b5b27..352dd83 100644
--- a/winboard/jaws.c
+++ b/winboard/jaws.c
@@ -1240,9 +1240,8 @@ NiceTime(int x)
       }\
       return 0;\
 
-#define JAWS_KB_NAVIGATION \
+#define JAWS_KBDOWN_NAVIGATION \
 \
-	case WM_KEYDOWN:\
 \
 		if(GetKeyState(VK_MENU) < 0 && GetKeyState(VK_CONTROL) < 0) {\
 		    /* Control + Alt + letter used for speaking piece positions */\
@@ -1279,14 +1278,13 @@ NiceTime(int x)
 			KeyboardMove(hwnd, message, wParam, lParam);\
 			break;\
 		}\
-		break;\
-	case WM_KEYUP:\
+
+#define JAWS_KBUP_NAVIGATION \
 		switch (wParam) {\
 		case VK_SPACE:\
 			KeyboardMove(hwnd, message, wParam, lParam);\
 			break;\
 		}\
-		break;\
 
 #define JAWS_MENU_ITEMS \
 		case IDM_PossibleAttackMove:  /*What can I possible attack from here */\
diff --git a/winboard/winboard.c b/winboard/winboard.c
index 61cda89..a34b9cd 100644
--- a/winboard/winboard.c
+++ b/winboard/winboard.c
@@ -737,7 +737,8 @@ void ThawUI()
 #define JAWS_INIT
 #define JAWS_ARGS
 #define JAWS_ALT_INTERCEPT
-#define JAWS_KB_NAVIGATION
+#define JAWS_KBUP_NAVIGATION
+#define JAWS_KBDOWN_NAVIGATION
 #define JAWS_MENU_ITEMS
 #define JAWS_SILENCE
 #define JAWS_REPLAY
@@ -4573,6 +4574,7 @@ WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
   char fileTitle[MSG_SIZ];
   char buf[MSG_SIZ];
   static SnapData sd;
+  static int peek=0;
 
   switch (message) {
 
@@ -4600,7 +4602,23 @@ WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
     MouseEvent(hwnd, message, wParam, lParam);
     break;
 
-  JAWS_KB_NAVIGATION
+  case WM_KEYUP:
+    if((char)wParam == '\b') {
+      ForwardEvent(); peek = 0;
+    }
+
+    JAWS_KBUP_NAVIGATION
+
+    break;
+
+  case WM_KEYDOWN:
+    if((char)wParam == '\b') {
+      if(!peek) BackwardEvent(), peek = 1;
+    }
+
+    JAWS_KBDOWN_NAVIGATION
+
+    break;
 
   case WM_CHAR: