Oh, I see. In that case, they should use the render-image function
directly. Override the on-paint method, call the get-dc method and
pass that and some suitable coordinates to do the drawing. I recommend
using this only for drawing the final image, don't use other dc
methods (I mean, you can, but
Thanks. Yes, they want to (say) draw a solid green circle next to the name
of someone who has been active in the last five minutes. As I understand
it, they followed the GUI Toolkit intro and arrived at the point where they
have a canvas% with the on-paint method specified in its constructor. The
o
Here’s one way, if you mean a bitmap% object:
#lang racket/base
(provide image->bitmap)
(require racket/class
(only-in racket/draw make-bitmap bitmap-dc%)
(only-in 2htdp/image image-width image-height)
(only-in mrlib/image-core render-image))
(define (image->bitmap im
When you say "bitmap" do you mean "bitmap% object"? And if so, why do
they want to do that? If not, do you mean something else?
Robby
On Thu, Mar 19, 2015 at 5:24 PM, Andrew Mauer-Oats wrote:
> Is there a public way to change an image created using the 2htdp/image
> library into a bitmap?
>
> M
Is there a public way to change an image created using the 2htdp/image
library into a bitmap?
My students are used to those functions and it would be easier for some of
them to go and build the GUI they want if they didn't have to change over
to explicitly using drawing contexts.
I have looked at
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