Inform user in EditPosition mode how to clear board

[xboard.git] / backend.c

diff --git a/backend.c b/backend.c
index 803bb71..5696701 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -6886,6 +6886,12 @@ LeftClick (ClickType clickType, int xPix, int yPix)
               || x == BOARD_RGHT+1 && y >= gameInfo.holdingsSize) )
        return;
 
+    if(gotPremove && x == premoveFromX && y == premoveFromY && clickType == Release) {
+       // could be static click on premove from-square: abort premove
+       gotPremove = 0;
+       ClearPremoveHighlights();
+    }
+
     if(clickType == Press && fromX == x && fromY == y && promoDefaultAltered)
        fromX = fromY = -1; // second click on piece after altering default promo piece treated as first click
 
@@ -8357,7 +8363,7 @@ if(appData.debugMode) fprintf(debugFP, "nodes = %d, %lld\n", (int) programStats.
 
     /*
      * If chess program startup fails, exit with an error message.
-     * Attempts to recover here are futile.
+     * Attempts to recover here are futile. [HGM] Well, we try anyway
      */
     if ((StrStr(message, "unknown host") != NULL)
        || (StrStr(message, "No remote directory") != NULL)
@@ -8371,7 +8377,14 @@ if(appData.debugMode) fprintf(debugFP, "nodes = %d, %lld\n", (int) programStats.
                _(cps->which), cps->program, cps->host, message);
        RemoveInputSource(cps->isr);
        if(appData.icsActive) DisplayFatalError(buf1, 0, 1); else {
-           if(cps == &first) appData.noChessProgram = TRUE;
+           if(cps == &first) {
+               appData.noChessProgram = TRUE;
+               gameMode = MachinePlaysBlack; ModeHighlight(); // kludge to unmark Machine Black menu
+               gameMode = BeginningOfGame; ModeHighlight();
+               SetNCPMode();
+           }
+           if(GetDelayedEvent()) CancelDelayedEvent(), ThawUI(); // [HGM] cancel remaining loading effort scheduled after feature timeout
+           DisplayMessage("", ""); // erase waiting message
            DisplayError(buf1, 0);
        }
        return;
@@ -13680,6 +13693,7 @@ EditPositionEvent ()
     currentMove = forwardMostMove = backwardMostMove = 0;
     HistorySet(parseList, backwardMostMove, forwardMostMove, currentMove-1);
     DisplayMove(-1);
+    if(!appData.pieceMenu) DisplayMessage("Click clock to clear board", "");
 }
 
 void