author Jørgen P. Tjernø <>
Mon, 22 Apr 2013 18:14:32 -0700
changeset 7088 664d8532219b
parent 6885 700f1b25f77f
child 7140 e1896b95a8a7
permissions -rw-r--r--
Make Cocoa_ShowMessageBox work in background threads.

  Simple DirectMedia Layer
  Copyright (C) 1997-2013 Sam Lantinga <>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
#include "SDL_config.h"


#if defined(__APPLE__) && defined(__POWERPC__)
#include <altivec.h>
#undef bool
#undef vector
#undef pixel

#include "SDL_messagebox.h"
#include "SDL_cocoavideo.h"

@interface SDLMessageBoxPresenter : NSObject {
    NSInteger clicked;

@implementation SDLMessageBoxPresenter
- (id)init
    self = [super init];
    if (self) {
        clicked = -1;

    return self;

- (void)showAlert:(NSAlert*)alert
    clicked = [alert runModal];

/* Display a Cocoa message box */
Cocoa_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    NSAlert* alert = [[[NSAlert alloc] init] autorelease];

    if (messageboxdata->flags & SDL_MESSAGEBOX_ERROR) {
        [alert setAlertStyle:NSCriticalAlertStyle];
    } else if (messageboxdata->flags & SDL_MESSAGEBOX_WARNING) {
        [alert setAlertStyle:NSWarningAlertStyle];
    } else {
        [alert setAlertStyle:NSInformationalAlertStyle];

    [alert setMessageText:[NSString stringWithUTF8String:messageboxdata->title]];
    [alert setInformativeText:[NSString stringWithUTF8String:messageboxdata->message]];

    const SDL_MessageBoxButtonData *buttons = messageboxdata->buttons;
    int i;
    for (i = 0; i < messageboxdata->numbuttons; ++i) {
        NSButton *button = [alert addButtonWithTitle:[NSString stringWithUTF8String:buttons[i].text]];
        if (buttons[i].flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) {
            [button setKeyEquivalent:@"\r"];
        } else if (buttons[i].flags & SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT) {
            [button setKeyEquivalent:@"\033"];
        } else {
            [button setKeyEquivalent:@""];

    SDLMessageBoxPresenter* presenter = [[[SDLMessageBoxPresenter alloc] init] autorelease];

    [presenter performSelectorOnMainThread:@selector(showAlert:)

    int returnValue = 0;
    NSInteger clicked = presenter->clicked;
    if (clicked >= NSAlertFirstButtonReturn)
        clicked -= NSAlertFirstButtonReturn;
        *buttonid = buttons[clicked].buttonid;
        returnValue = SDL_SetError("Did not get a valid `clicked button' id: %d", clicked);

    [pool release];

    return returnValue;


/* vi: set ts=4 sw=4 expandtab: */