Can't get NSMouseMoved events from nextEventMatchingMask with an NSOpenGLView - cocoa

Question

I'm trying to create a basic opengl window with mouse input using a typical win-style event loop. The problem is that I'm pulling my hair out trying to get a NSMouseMoved event to generate. The following code outputs debug info on Mouse Up, Mouse Down, Mouse Drag, etc but no Mouse Move even though I've told the window setAcceptsMouseMovedEvents:YES. So, any ideas on how to get mouse move to work in the following example?
Obviously, the way I'm creating the window is very un-cocoa like, but I'm trying to port a makefile-based windows c++ codebase that does some tricky threading things. That's why I'm sticking with a style similar to a win32 loop using GetMsg().
Also, to build I'm just using:
gcc -o hellogl hellogl.m -framework Foundation -framework Cocoa -framework OpenGL
Thanks for the help!
#import <Foundation/Foundation.h>
#import <Cocoa/Cocoa.h>
#include <OpenGL/gl.h>
#include <stdlib.h>
#interface BaseWinDelegate : NSWindow<NSWindowDelegate>
#end
#implementation BaseWinDelegate
- (void) windowWillClose:(NSNotification*)notification
{
printf("Closing.\n");
NSEvent * evt = [NSEvent otherEventWithType:NSApplicationDefined
location: NSMakePoint(0,0)
modifierFlags: 0
timestamp: 0.0
windowNumber: 0
context: nil
subtype: 0
data1: 0
data2: 0];
[NSApp postEvent:evt atStart:NO];
}
#end
#interface BaseView : NSOpenGLView
- (void) update;
- (void) drawRect:(NSRect)rect;
- (void) reshape;
#end
#implementation BaseView
- (void) drawRect:(NSRect)rect
{
glClearColor(0.2f,0.2f,0.2f,0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
[[self openGLContext] flushBuffer];
}
- (void) update
{
printf("Update.\n");
}
- (void) reshape
{
NSRect rect;
[[self openGLContext] update];
rect = [self bounds];
printf("Reshape - %f, %f\n", rect.size.width,rect.size.height);
}
#end
int main(int argc, const char * argv[])
{
printf("Starting.\n");
NSAutoreleasePool * myPool = [[NSAutoreleasePool alloc] init ];
NSApplicationLoad();
NSRect rect = NSMakeRect(100,100,640,480);
NSWindow * win = [[NSWindow alloc] initWithContentRect:rect
styleMask:NSTitledWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSResizableWindowMask
backing: NSBackingStoreBuffered
defer: NO];
NSOpenGLPixelFormatAttribute attributes[] =
{
NSOpenGLPFADoubleBuffer,
0
};
NSOpenGLPixelFormat* pf = [[NSOpenGLPixelFormat alloc] initWithAttributes:attributes];
BaseView * pView = [[BaseView alloc] initWithFrame:rect pixelFormat:pf];
BaseWinDelegate * myDelegate = [BaseWinDelegate alloc];
[win setDelegate:myDelegate];
[win setContentView: pView];
[win makeKeyAndOrderFront: NSApp];
[win setAcceptsMouseMovedEvents:YES];
do
{
NSEvent * evt = [NSApp nextEventMatchingMask : NSAnyEventMask
untilDate : [NSDate distantFuture]
inMode : NSDefaultRunLoopMode
dequeue : YES ];
NSEventType evtType = [evt type];
if (evtType == NSApplicationDefined)
{
break;
}
printf("%d\n",(int)evtType);
[NSApp sendEvent : evt];
} while (1);
[myPool drain];
return EXIT_SUCCESS;
}

Answer 1

Ok, figured it out. The problem is that it's not a foreground process. So adding this code fixes it.
ProcessSerialNumber psn;
GetCurrentProcess(&psn);
TransformProcessType(&psn, kProcessTransformToForegroundApplication);
SetFrontProcess(&psn);
That was preventing the window from becoming the key window and sending off mouse moved events. Hope it helps someone else (i.e. the 0.1% of people who like to handle their own event loop).