src/video/uikit/SDL_uikitevents.m
author DavidLudwig
Mon, 23 Jul 2012 00:10:19 -0400
changeset 6684 992268e65626
parent 6346 56871d364efc
child 6685 8faee8f46165
permissions -rw-r--r--
Fix for UIScrollView instances not scrolling properly in iOS apps that don't use SDL_iPhoneSetAnimationCallback
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 #include "SDL_config.h"
    22 
    23 #if SDL_VIDEO_DRIVER_UIKIT
    24 
    25 #include "../../events/SDL_events_c.h"
    26 
    27 #include "SDL_uikitvideo.h"
    28 #include "SDL_uikitevents.h"
    29 
    30 #import <Foundation/Foundation.h>
    31 #include "jumphack.h"
    32 
    33 static BOOL UIKit_EventPumpEnabled = YES;
    34 
    35 void
    36 SDL_iPhoneSetEventPump(SDL_bool enabled)
    37 {
    38     UIKit_EventPumpEnabled = enabled;
    39 }
    40 
    41 void
    42 UIKit_PumpEvents(_THIS)
    43 {
    44     if (!UIKit_EventPumpEnabled)
    45         return;
    46 
    47     /*
    48         When the user presses the 'home' button on the iPod
    49         the application exits -- immediatly.
    50 
    51         Unlike in Mac OS X, it appears there is no way to cancel the termination.
    52 
    53         This doesn't give the SDL user's application time to respond to an SDL_Quit event.
    54         So what we do is that in the UIApplicationDelegate class (SDLUIApplicationDelegate),
    55         when the delegate receives the ApplicationWillTerminate message, we execute
    56         a longjmp statement to get back here, preventing an immediate exit.
    57      */
    58     if (setjmp(*jump_env()) == 0) {
    59         /* if we're setting the jump, rather than jumping back */
    60         SInt32 result;
    61         do {
    62             result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, TRUE);
    63         } while (result == kCFRunLoopRunHandledSource);
    64 		
    65 		/* Make sure UIScrollView objects scroll properly. */
    66 		do {
    67 			result = CFRunLoopRunInMode((CFStringRef)UITrackingRunLoopMode, 0, TRUE);
    68 		} while(result == kCFRunLoopRunHandledSource);
    69     }
    70 }
    71 
    72 #endif /* SDL_VIDEO_DRIVER_UIKIT */
    73 
    74 /* vi: set ts=4 sw=4 expandtab: */