Preview maps when hovering over them.

src/multiint.cpp

@@ -3479,7 +3479,8 @@ void runMultiOptions(void)
 {
 	static UDWORD	lastrefresh = 0;
 	UDWORD			id, value, i;
-	char			sTemp[128];
+	char                    sTemp[128], oldGameMap[128];
+	int                     oldMaxPlayers;
 	PLAYERSTATS		playerStats;
 	W_CONTEXT		context;
 
@@ -3551,7 +3552,8 @@ void runMultiOptions(void)
 	if(multiRequestUp)
 	{
 		id = widgRunScreen(psRScreen);						// a requester box is up.
-		if( runMultiRequester(id,&id,(char*)&sTemp,&value))
+		bool isHoverPreview;
+		if (runMultiRequester(id, &id, (char *)&sTemp, &value, &isHoverPreview))
 		{
 			switch(id)
 			{
@@ -3570,17 +3572,30 @@ void runMultiOptions(void)
 				netPlayersUpdated = true;
 				break;
 			case MULTIOP_MAP:
+				sstrcpy(oldGameMap, game.map);
+				oldMaxPlayers = game.maxPlayers;
+
 				sstrcpy(game.map, sTemp);
-				game.maxPlayers =(UBYTE) value;
-				loadMapPreview(true);
+				game.maxPlayers = value;
+				loadMapPreview(!isHoverPreview);
+
+				if (isHoverPreview)
+				{
+					sstrcpy(game.map, oldGameMap);
+					game.maxPlayers = oldMaxPlayers;
+				}
 
 				widgSetString(psWScreen,MULTIOP_MAP,sTemp);
 				addGameOptions();
 				break;
 			default:
+				loadMapPreview(false);  // Restore the preview of the old map.
 				break;
 			}
-			addPlayerBox( !ingame.bHostSetup );
+			if (!isHoverPreview)
+			{
+				addPlayerBox( !ingame.bHostSetup );
+			}
 		}
 	}
 	else

src/multimenu.cpp

@@ -158,6 +158,7 @@ static char const * M_REQUEST_NP_TIPS[] = {   N_("2 players"), N_("3 players"),
 #define R_BUT_H			30
 
 bool			multiRequestUp = false;				//multimenu is up.
+static unsigned         hoverPreviewId;
 static bool		giftsUp[MAX_PLAYERS] = {true};		//gift buttons for player are up.
 
 char		debugMenuEntry[DEBUGMENU_MAX_ENTRIES][MAX_STR_LENGTH];
@@ -604,6 +605,7 @@ void addMultiRequest(const char* searchDir, const char* fileExtension, UDWORD mo
 		}
 	}
 	multiRequestUp = true;
+	hoverPreviewId = 0;
 
 
 	// if it's map select then add the cam style buttons.
@@ -663,24 +665,44 @@ static void closeMultiRequester(void)
 	return;
 }
 
-bool runMultiRequester(UDWORD id,UDWORD *mode, char *chosen,UDWORD *chosenValue)
+bool runMultiRequester(UDWORD id, UDWORD *mode, char *chosen, UDWORD *chosenValue, bool *isHoverPreview)
 {
 	if( (id == M_REQUEST_CLOSE) || CancelPressed() )			// user hit close box || hit the cancel key
 	{
 		closeMultiRequester();
+		*mode = 0;
 		return true;
 	}
 
-	if( id>=M_REQUEST_BUT && id<=M_REQUEST_BUTM)		// chose a file.
+	bool hoverPreview = false;
+	if (id == 0 && context == MULTIOP_MAP)
+	{
+		id = widgGetMouseOver(psRScreen);
+		if (id == hoverPreviewId)
+		{
+			id = 0;  // Don't re-render preview.
+		}
+		hoverPreview = true;
+	}
+	if (id >= M_REQUEST_BUT && id <= M_REQUEST_BUTM)  // chose a file.
 	{
 		strcpy(chosen,((W_BUTTON *)widgGetFromID(psRScreen,id))->pText );
 
 		*chosenValue = ((W_BUTTON *)widgGetFromID(psRScreen,id))->UserData ;
-		closeMultiRequester();
 		*mode = context;
+		*isHoverPreview = hoverPreview;
+		hoverPreviewId = id;
+		if (!hoverPreview)
+		{
+			closeMultiRequester();
+		}
 
 		return true;
 	}
+	if (hoverPreview)
+	{
+		id = 0;
+	}
 
 	switch (id)
 	{

src/multimenu.h

@@ -31,7 +31,7 @@
 extern void		addMultiRequest(const char* searchDir, const char* fileExtension, UDWORD id,UBYTE mapCam, UBYTE numPlayers);
 extern bool		multiRequestUp;
 extern W_SCREEN *psRScreen;			// requester stuff.
-extern bool		runMultiRequester(UDWORD id,UDWORD *contextmode, char *chosen,UDWORD *chosenValue);
+bool runMultiRequester(UDWORD id, UDWORD *mode, char *chosen, UDWORD *chosenValue, bool *isHoverPreview);
 extern void		displayRequestOption(WIDGET *psWidget, UDWORD xOffset, UDWORD yOffset, PIELIGHT *pColours);
 
 // multimenu