added screen index for multiple monitors. fixed scroll wheel zoom crash due to negative max dist

Former-commit-id: 26e86f54547bcb5420667a15ddeb40842f2cb8f7
Former-commit-id: 5d84159b16a0c9a0ef487f10c1377b420af9f5e9

AircraftData.cpp

@@ -117,6 +117,7 @@ AircraftData::AircraftData(){
     appData.screen_height           = 0;    
     appData.screen_depth            = 32;
     appData.fullscreen              = 0;
+    appData.screen_index              = 0;
 
     // Initialize status
     Status.msgRate                = 0;

Input.cpp

@@ -13,6 +13,10 @@ static uint64_t mstime(void) {
     return mst;
 }
 
+template <typename T> int sgn(T val) {
+    return (T(0) < val) - (val < T(0));
+}
+
 void Input::getInput()
 {
 	SDL_Event event;
@@ -39,7 +43,11 @@ void Input::getInput()
 			break;
 
 			case SDL_MOUSEWHEEL:
-				appData.maxDist *= 1.0 + event.wheel.y / 10.0;
+				appData.maxDist *= 1.0 + 0.5 * sgn(event.wheel.y);
+				if(appData.maxDist < 0.001f) {
+					appData.maxDist = 0.001f;
+				}
+
 				appData.mapTargetMaxDist = 0;
 				appData.mapMoved = 1;
 				break;

init.c

@@ -36,7 +36,7 @@ void init(char *title) {
 		appData.screen_height= DM.h;
     }
 
-    appData.window =  SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, appData.screen_width, appData.screen_height, flags);		
+    appData.window =  SDL_CreateWindow(title,  SDL_WINDOWPOS_CENTERED_DISPLAY(appData.screen_index),  SDL_WINDOWPOS_CENTERED_DISPLAY(appData.screen_index), appData.screen_width, appData.screen_height, flags);		
 	appData.renderer = SDL_CreateRenderer(appData.window, -1, SDL_RENDERER_ACCELERATED);
 	appData.mapTexture = SDL_CreateTexture(appData.renderer,
                                SDL_PIXELFORMAT_ARGB8888,

map1090.REMOVED.git-id

@@ -1 +1 @@
-3e3eb8a1241fe042f8979c8ab0fb931f24e6100f
+dbb808dc2f784e53f7c3967e7b0bb11f9ef1a825

map1090.cpp

@@ -70,6 +70,7 @@ void showHelp(void) {
   "--help                           Show this help\n"
   "--uiscale <factor>               UI global scaling (default: 1)\n"  
   "--screensize <width> <height>    Set frame buffer resolution (default: screen resolution)\n"
+  "--screenindex <i>                Set the index of the display to use (default: 0)\n"
   "--fullscreen                     Start fullscreen\n"
     );
 }
@@ -94,9 +95,7 @@ int main(int argc, char **argv) {
     for (j = 1; j < argc; j++) {
         int more = ((j + 1) < argc); // There are more arguments
 
-        if        (!strcmp(argv[j],"--net-bo-port") && more) {
+        if        (!strcmp(argv[j],"--port") && more) {
-            aircraftData.modes.net_input_beast_port = atoi(argv[++j]);
-        } else if (!strcmp(argv[j],"--port") && more) {
             aircraftData.modes.net_input_beast_port = atoi(argv[++j]);
         } else if (!strcmp(argv[j],"--server") && more) {
             std::strcpy(aircraftData.server, argv[++j]);            
@@ -110,6 +109,8 @@ int main(int argc, char **argv) {
             aircraftData.modes.metric = 1;
         } else if (!strcmp(argv[j],"--fullscreen")) {
             appData.fullscreen = 1;         
+        } else if (!strcmp(argv[j],"--screenindex")) {
+            appData.screen_index = atoi(argv[++j]);         
         } else if (!strcmp(argv[j],"--uiscale") && more) {
             appData.screen_uiscale = atoi(argv[++j]);   
          } else if (!strcmp(argv[j],"--screensize") && more) {

structs.h

@@ -36,6 +36,7 @@ typedef struct AppData
     int screen_height;
     int screen_depth;
     int fullscreen;
+    int screen_index;
 
     float centerLon;
     float centerLat;