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the installer doesn't work because the path to where template files should be located has changed...
i worked around this with greg, and his setup is now able to generate projects from the template, but i haven't yet added this to a 10.7.3 installer

Check to make sure that line.origin works... It wasn't yesterday.

I was able to move the canvas... should this be blocked somehow?

I got this warning today:

[C4Log] C4ShapeLayer setOpacity not currently available

should add functionality to create complex shapes...

C4Shape *complex = [C4Line ...];
[complex addEllipse:]
[complex appendEllipse];
etc...

for the following code:

myCustomShape = [CustomShape new];
[myCustomShape rect:CGRectMake(284, 412, 200, 200)];

[myCustomShape addGesture:TAP name:@"singleTap" action:@"methodA"];
[myCustomShape addGesture:TAP name:@"doubleTap" action:@"methodB"];

[myCustomShape numberOfTapsRequired:1 forGesture:@"singleTap"];
[myCustomShape numberOfTapsRequired:2 forGesture:@"doubleTap"];

[self.canvas addShape:myCustomShape];

the gestures aren't setting the right number of taps...

the @"doubleTap" gesture triggers only with a single tap

When applying the BEGINCURRENT animation option to a C4Shape object, in the middle of an ongoing animation, the visible state of the object flicks back to its original state before initiating a new animation.

The expected behaviour for the following is to animate from C4GREY to C4RED over 5 seconds. At 2.5 seconds the current colour (mix of grey / red) should begin smoothly animating to C4BLUE.

@implementation C4WorkSpace {
    C4Shape *s;
}

- (void)setup {
    s = [C4Shape ellipse:CGRectMake(0, 0, 100, 100)];
    s.center = self.canvas.center;
    [self.canvas addShape:s];

    s.animationDuration = 5.0f;
    s.animationOptions = BEGINCURRENT;
    s.fillColor = C4RED;

    [self runMethod:@"test" afterDelay:2.5];
}

-(void)test {
    s.fillColor = C4BLUE;
}
@end

This causes the fillColor of the shape to flick back to C4GREY before animating to C4BLUE.

Add masks and make them animated, for images (first) and then for any other C4Control (if possible)

When a shape is made using shapeFromString: it seems to not have a frame.
The origin is at the bottom-left of the object (instead of the typical top-right).

C4Movie crashed when creating with an mpeg..
Should check this, or any other file types...

there should be remove / delete object methods...
remove would take something off the canvas
delete would take something off the canvas and then delete the object from memory

there should be definitions for canvasSize and canvasCenter and canvasFrame

in the setup method, when a shape is created, it takes longer to build the path than to set its new center position...
so if i write

shape = [C4Shape rect:];
shape.center = CGPoint;

the shape stays in its original rect...

not sure how to get around this...

C4Label.frame = CGRect doesn't actually change the visible dimensions of the Label...

there should be a simple way of triggering: performSelector:object:afterDelay

there should be a simple way of adding timers to the canvas, or to objects

is it possible to include a method for listening to multiple objects at the same time?

example:

listenFor:@"something" fromObjects:(NSArray *)anArrayOfObjects andRunMethod: ...

Might be handy...

Strangely, the [image colorInvert] method didn't do anything on one computer... but it generally works on all other computers...
Not sure why this would happen, if the computers have the same configuration

We need to find a way to be able to get animations to slow down and/or stop mid-animation, as well as modify current animations and also to be able to set the current time of the animation (something akin to scrubbing in a movie).

the color invert method doesn't reset when animated a second time...

When an animation is in progress, and was triggered by touchesBegan, touching the canvas a second time really messes with the way the animation looks.

Perhaps there should be a way of blocking interaction when something is animating, or of being able to reset the animation more smoothly when this happens.

creating arcs doesn't work...
there's a bunch of problems with them...
they need to be thoroughly tested

You should be able to set the image.width property, like working with movies.
perhaps there should also be a image.constrainsProportions = YES property

setting a value for label.numberOfLines causes a crash

michael wylegly suggested adding short examples to the documentation writeup for each method...
a lot of work, but probably very useful

setting pointA for a line seems to work fine, but setting pointB results in a weird movement of the line...

would be nice to have some whitespace truncation for names in strings being passed to things...
just a small addition that might make things simpler...
perhaps not... who knows...

e.g. to handle things like: @" image.jpg", or @"image.jpg "

Any time an NSView animation uses AUTOREVERSE, without repeating, the animation flickers at the end...
This happens no matter what... with moving the view, or even changing its alpha...
I think this is a problem with Apple's view animation... That is, I don't think I can work around this on my own with views themselves... which is too bad...

I tried a variety of different ways of setting things with completion handlers, but even some of the techniques in the O'Reilly book iOS5 Programming do not work... though the author says they should...

There should be an easy way to duplicate a shape, or create a new shape which is a copy of another shape.

People keep asking "how do i animate from here, to here and when the first animation is done, trigger a second animation?"

this is a serious design consideration for the coming development phase

There should be an easy way to set global settings for all objects of a particular class.
For instance, shapes... So that you don't have to individually change the colors of each shape as you create them.

myshape =
followed by
myshape =
invalidates the shape...

not sure exactly what is happening here...
will have to test this after the workshops are done and i can focus better.

there should be an easy way of chaining animations...
like a callback or something... but a very simple way of triggering things

you should also look into setting multiple kinds of animation options in a row... this needs to be tested
i.e.

option
delay
set property
option
set property
option
duration
set property

in the same block of code for a single object...

for instance
duration = 1
move
duration = 2
change color

so the object moves for 1 second and changes color for 2 seconds...

There is an initial animation with shapes when they are added to the canvas...
Try to get rid of these....

This may have to do with where Setup is called in the application launch hierarchy, and to guarantee that the animation time is set to 0, rather than the implicit 0.25

Need to add audio control to movies

I had to pause the movie before playing again after changing the rate... should this be the way it works????
Maybe setting rate should pause, then play?

the C4Shape closeShape: method doesn't currently work...

you can't easily add gestures to the canvas, like adding them to objects...
it would be nice if gestures were incorporated into this as well...

setting the fill rule for a polygon doesn't change anything...

The following is awkward, we should make this easier...

polygon.transform = CGAffineTransformMakeRotation(-PI/2);

The ability to pause / stop an animation should be added in the coming design phase.
And, the ability to resume as well...

there is no framerate in C4iOS... on purpose.
the intention is to update things only when they need to be updated, and to let the system handle a lot of the animation implicitly.
this raises issues, though, because a lot of ideology (especially in creative coding languages) relies on the concept of a framerate and things being updated 30fps or whatever...
this impacts any kind of Vector class... because particle / physics / vector systems necessarily need some kind of update function.
also, the technique for rendering a lot of these systems uses a frame-based drawing technique (e.g. draw circle at X,Y now) and doesn't think about using some kind of implicit animations...
i am not sure how to get around this kind of thing, or if it needs to be got around at all...

not sure how to implement this
many students have asked how-to... but i'm not sure yet...
the implicit transforms rotate to the nearest angle, (i.e. they will treat TWO_PI as if it were 0)

If I import a video and it's in "portrait" orientation, c4movie squishes it into "landscape" orientation without rotating it. I used my ipod to capture the video.

Here is a work around:

CGRect newFrame = newMovie.frame;
CGSize newSize = CGSizeMake(newFrame.size.height, newFrame.size.width);
newFrame.size = newSize;
newMovie.frame = newFrame;

newMovie.center = CGPointMake(384,512);

myCustomShape = [CustomShape new];

doesn't call (located in CustomShape.m):

-(void)setup {
    C4Log(@"setup");
    [self addGesture:TAP name:@"singleTap" action:@"methodA"];
    [self addGesture:TAP name:@"doubleTap" action:@"methodB"];

    [self numberOfTapsRequired:1 forGesture:@"singleTap"];
    [self numberOfTapsRequired:2 forGesture:@"doubleTap"];
}

would be nice to only have to write [canvas ...];

michael wylegly suggested adding short examples to the documentation writeup for each method...
a lot of work, but probably very useful

It's possible to access the points inside a C4Shape which is a line... using shape.pointA and shape.pointB

Is it possible to have access to all the points in a polygon?
Or, at least return an array of the points inside the polygon?
There should also be a reference to the number of points inside the shape as well.

there isn't an easy way of adding listeners to the canvas

setting animationOptions to AUTOREVERSE | REPEAT after animating the frame of an object from one place to another deletes / removes the object from the screen... my guess is that it doesn't set the frame properly and reverts to its original state...