screenshots in mac osx with timer

README.md

For the impatient:

1. determine the relative coordinates for the cropped screenshot
2. determine the coordinates of the mouse click
3. compile click.m using cc
4. run the shell script

click.m

// File:
// click.m
//
// Compile with:
// gcc -o click click.m -framework ApplicationServices -framework Foundation
//
// Usage:
// ./click -x pixels -y pixels
// At the given coordinates it will click and release.
//
// From http://hints.macworld.com/article.php?story=2008051406323031
// and
// https://stackoverflow.com/a/26687223/1164295
#import <Foundation/Foundation.h>
#import <ApplicationServices/ApplicationServices.h>

int main(int argc, char *argv[]) {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSUserDefaults *args = [NSUserDefaults standardUserDefaults];

    int x = [args integerForKey:@"x"];
    int y = [args integerForKey:@"y"];

    CGPoint pt;
    pt.x = x;
    pt.y = y;

    CGPostMouseEvent( pt, 1, 1, 1 );
    CGPostMouseEvent( pt, 1, 1, 0 );

    [pool release];
    return 0;
}

runme.sh

#!/usr/bin/env bash

# move the mouse to the relevant window and location
./click -x 1212 -y 777

# how many screenshots to take
for index in `seq -w 1 270`; do 
  echo slide $index
  sleep 4
  screencapture -x -R150,120,1130,700 slide_${index}.png
  ./click -x 1212 -y 777
done