main.m

//
//  MiddleClick
//  main.m
//
//  Created by Clem on 21.06.09.
//

#import <Cocoa/Cocoa.h>
#import "TrayMenu.h"
#include <math.h>
#include <unistd.h>
#include <CoreFoundation/CoreFoundation.h>
#import <Foundation/Foundation.h> 
#import "WakeObserver.h"

typedef struct { float x,y; } mtPoint;
typedef struct { mtPoint pos,vel; } mtReadout;

typedef struct {
	int frame;
	double timestamp;
	int identifier, state, foo3, foo4;
	mtReadout normalized;
	float size;
	int zero1;
	float angle, majorAxis, minorAxis; // ellipsoid
	mtReadout mm;
	int zero2[2];
	float unk2;
} Finger;

typedef int MTDeviceRef;
typedef int (*MTContactCallbackFunction)(int,Finger*,int,double,int);

MTDeviceRef MTDeviceCreateDefault();
void MTRegisterContactFrameCallback(MTDeviceRef, MTContactCallbackFunction);
void MTDeviceStart(MTDeviceRef);
CFMutableArrayRef MTDeviceCreateList(void); //returns a CFMutableArrayRef array of all multitouch devices

BOOL maybeMiddleClick;
NSDate *touchStartTime;
float middleclickX, middleclickY;
float middleclickX2, middleclickY2;
MTDeviceRef dev;

int callback(int device, Finger *data, int nFingers, double timestamp, int frame) {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];	

	//detect triple tap click from raw finger data
	if (nFingers==0){
		touchStartTime = NULL;
		if(middleclickX+middleclickY) {
			float delta = ABS(middleclickX-middleclickX2)+ABS(middleclickY-middleclickY2); 
			if (delta < 0.4f) {
				// Emulate a middle click
				
				// get the current pointer location
				CGEventRef ourEvent = CGEventCreate(NULL);
				CGPoint ourLoc = CGEventGetLocation(ourEvent);
				 
				/*
				// CMD+Click code
				CGPostKeyboardEvent( (CGCharCode)0, (CGKeyCode)55, true );
				CGPostMouseEvent( ourLoc, 1, 1, 1);
				CGPostMouseEvent( ourLoc, 1, 1, 0);
				CGPostKeyboardEvent( (CGCharCode)0, (CGKeyCode)55, false );
				*/
				
				// Real middle click
				CGPostMouseEvent( ourLoc, 1, 3, 0, 0, 1);
				CGPostMouseEvent( ourLoc, 1, 3, 0, 0, 0);
				
			}
		}
			
	} else if (nFingers>0 && touchStartTime == NULL){		
		NSDate *now = [[NSDate alloc] init];
		touchStartTime = [now retain];
		[now release];
		
		maybeMiddleClick = YES;
		middleclickX = 0.0f;
		middleclickY = 0.0f;
	} else {
		if (maybeMiddleClick==YES){
			NSTimeInterval elapsedTime = -[touchStartTime timeIntervalSinceNow];  
			if (elapsedTime > 0.5f)
				maybeMiddleClick = NO;
		}
	}
	
	if (nFingers>3) {
		maybeMiddleClick = NO;
		middleclickX = 0.0f;
		middleclickY = 0.0f;
	}
	
	if (nFingers==3) {
		Finger *f1 = &data[0];
		Finger *f2 = &data[1];
		Finger *f3 = &data[2];
			
		if (maybeMiddleClick==YES) {
			middleclickX = (f1->normalized.pos.x+f2->normalized.pos.x+f3->normalized.pos.x);
			middleclickY = (f1->normalized.pos.y+f2->normalized.pos.y+f3->normalized.pos.y);
			middleclickX2 = middleclickX;
			middleclickY2 = middleclickY;
			maybeMiddleClick=NO;
		} else {
			middleclickX2 = (f1->normalized.pos.x+f2->normalized.pos.x+f3->normalized.pos.x);
			middleclickY2 = (f1->normalized.pos.y+f2->normalized.pos.y+f3->normalized.pos.y);
		}
	}
	[pool release];
	return 0;
}

int main(int argc, char *argv[]) {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];	
    [NSApplication sharedApplication];
	
	
	//Get list of all multi touch devices
	NSMutableArray* deviceList = (NSMutableArray*)MTDeviceCreateList(); //grab our device list
	
	
	//Iterate and register callbacks for multitouch devices.
	for(int i = 0; i<[deviceList count]; i++) //iterate available devices
	{
		MTRegisterContactFrameCallback((MTDeviceRef)[deviceList objectAtIndex:i], callback); //assign callback for device
		MTDeviceStart((MTDeviceRef)[deviceList objectAtIndex:i]); //start sending events
	}
	
	
	//register a callback to know when osx come back from sleep
	WakeObserver *wo = [[WakeObserver alloc] init];
	[[[NSWorkspace sharedWorkspace] notificationCenter] addObserver: wo selector: @selector(receiveWakeNote:) name: NSWorkspaceDidWakeNotification object: NULL];
	
	
	//add traymenu
    TrayMenu *menu = [[TrayMenu alloc] init];
    [NSApp setDelegate:menu];
    [NSApp run];
	
	[pool release];
    return EXIT_SUCCESS;
}