implement RMB click as long press

kambala-decapitator/vcmi#1

client/CMakeLists.txt

@@ -154,7 +154,7 @@ endif()
 if(WIN32)
 	set(client_ICON "VCMI_client.rc")
 elseif(APPLE_IOS)
-	set(client_SRCS ${client_SRCS} SDL_uikit_main.c)
+	set(client_SRCS ${client_SRCS} SDL_uikit_main.m)
 endif()
 
 if(ENABLE_DEBUG_CONSOLE)

client/SDL_uikit_main.c

@@ -1,19 +0,0 @@
-/*
-    SDL_uikit_main.c, placed in the public domain by Sam Lantinga  3/18/2019
-*/
-// #include "../../SDL_internal.h"
-
-/* Include the SDL main definition header */
-#include "SDL_main.h"
-
-#ifdef main
-#undef main
-#endif
-
-int
-main(int argc, char *argv[])
-{
-    return SDL_UIKitRunApp(argc, argv, SDL_main);
-}
-
-/* vi: set ts=4 sw=4 expandtab: */

client/SDL_uikit_main.m

@@ -0,0 +1,68 @@
+/*
+    SDL_uikit_main.c, placed in the public domain by Sam Lantinga  3/18/2019
+*/
+
+/* Include the SDL main definition header */
+#include "SDL_main.h"
+
+#include "SDL_events.h"
+
+@import UIKit;
+
+
+@interface SDLViewObserver : NSObject
+@end
+
+@implementation SDLViewObserver
+
+- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context {
+    __auto_type longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
+    longPress.minimumPressDuration = 0.1;
+    [(UIView *)[object valueForKey:keyPath] addGestureRecognizer:longPress];
+}
+
+- (void)handleLongPress:(UIGestureRecognizer *)gesture {
+    SDL_EventType mouseButtonType;
+    switch (gesture.state)
+    {
+        case UIGestureRecognizerStateBegan:
+            mouseButtonType = SDL_MOUSEBUTTONDOWN;
+            break;
+        case UIGestureRecognizerStateEnded:
+            mouseButtonType = SDL_MOUSEBUTTONUP;
+            break;
+        default:
+            return;
+    }
+
+    __auto_type touchedPoint = [gesture locationInView:gesture.view];
+    SDL_Event event;
+    event.button = (SDL_MouseButtonEvent){
+        .type = mouseButtonType,
+        .button = SDL_BUTTON_RIGHT,
+        .clicks = 1,
+        .x = touchedPoint.x,
+        .y = touchedPoint.y,
+    };
+    SDL_PushEvent(&event);
+}
+
+@end
+
+
+#ifdef main
+#undef main
+#endif
+
+int
+main(int argc, char *argv[])
+{
+    @autoreleasepool
+    {
+        __auto_type observer = [SDLViewObserver new];
+        [NSNotificationCenter.defaultCenter addObserverForName:UIWindowDidBecomeKeyNotification object:nil queue:nil usingBlock:^(NSNotification * _Nonnull note) {
+            [UIApplication.sharedApplication.keyWindow.rootViewController addObserver:observer forKeyPath:NSStringFromSelector(@selector(view)) options:NSKeyValueObservingOptionNew context:NULL];
+        }];
+        return SDL_UIKitRunApp(argc, argv, SDL_main);
+    }
+}