CodeWhichILike

file.mm

/*
 *
 * The code below simply returns a corrected frame for an object that has been "thrown" (with a flick
 * of the finger), and that object is then animated to that frame elsewhere in this case. It also 
 * decides where it should end up based on some variables like if it should be 50% hidden or nog (not 
 * shown in video below).
 *
 * You might now think "that's not impressive" and I agree, it is pretty easy code and not even that 
 * pretty. I'll be honest, I don't think I have any code that will blow your mind, I'm not that good 
 * of a programmer.
 *
 * I choose this code because of that it gave back to the application. It made an, at the time, stiff 
 * and boring application suddenly not just fluid, but actually FUN, to use. It is very satisfying to 
 * throw the object around and see it bounce back. I actually got emails about it where they 
 * complimented me on it, and that's when I became proud of this little snippet of code.
 *
 * Look at the result here http://gfycat.com/CompassionateFrenchAlligator 
 *
 * If you're wondering what it is it is "Assistive" which in turn is a/my re-implementation of the 
 * stock iOS "Assistive Touch" which I felt was not sufficient for me.
 *
 */

-(CGRect)correctedNewRect:(CGRect)rect shouldCareAboutSnappingBOOL:(BOOL)shouldCareAboutSnapping allowOutside:(BOOL)allowOutside
{
    float margin = 2;

    if(!CGRectContainsRect(self.bounds,mainView.frame) && allowOutside){
        margin = -(mainView.frame.size.width/2);
    }

    // Correct LEFT
    if( rect.origin.x < margin )
    {
        rect.origin.x = margin;
    }
    
    // Correct RIGHT
    else if (rect.origin.x + rect.size.width > [UIScreen mainScreen].bounds.size.width - margin )
    {
        rect.origin.x = [UIScreen mainScreen].bounds.size.width - margin - rect.size.width;
    }
    
    // Correct TOP
    if (rect.origin.y < margin )
    {
        rect.origin.y = margin;
    }
    
    // Correct BOTTOM
    else if( rect.origin.y + rect.size.height > [UIScreen mainScreen].bounds.size.height - margin )
    {
        rect.origin.y = [UIScreen mainScreen].bounds.size.height - margin - rect.size.height;
    }

    if(shouldCareAboutSnapping)
    {
        if(doesSnap)
        {
            float area = [UIScreen mainScreen].bounds.size.height/6;
            if(rect.origin.y < area)
            { 
                rect.origin.y = margin; 
            }
            else if( rect.origin.y > [UIScreen mainScreen].bounds.size.height - rect.size.height - area)
            { 
                rect.origin.y = [UIScreen mainScreen].bounds.size.height - rect.size.height - margin; 
            }
            else
            {
                if(rect.origin.x + rect.size.width/2 < [UIScreen mainScreen].bounds.size.width/2)
                { 
                    rect.origin.x = margin; 
                }
                else
                { 
                    rect.origin.x = [UIScreen mainScreen].bounds.size.width - rect.size.width - margin; 
                }
            }
        }
    }
    
    return rect;
}