Basically I have an image preview window (that is simply bound to some
data in my controller)... the size and brightness/control/saturation
of the image can be changed with sliders... when a slider value is
changed, the image data is updated (this is the operation that takes
some time that I launch with an NSInvocationOperation, I will call it
generateNewPreview: )... and then the image preview is updated and re-
sized to accommodate the new image size (by calling
resizePreviewWindow: )
Since I don't want to block the UI while the new image is generated, I
am using an NSInvocationOperation to generate the new image... however
since the resizePreviewWindow: method is dependent of the
generateNewPreview operation (because I need to know the size of the
newly generated image before I can re-size my preview window), I am
not sure on how/when I should be calling the resizePreviewWindow
method...
I tried waiting for the generateNewPreview: operation to complete
before re-sizing but obviously this beats the purpose of using an
NSOperation in the first place since it locks my UI while it waits for
the opeation to complete.... I tried making resizePreviewWindow: a
second operation that is dependent on the generateNewPreview:
operation, my app kept crashing... I can get it to work if I simply
call resizePreviewWindow: at the end of the generateNewPreview:
operation, however it seems to be causing a drawing problem (the
preview window becomes white while it gets re-sized and overall it
looks bad)... I tried to perform resizePreviewWindow on the main
thread, no luck either...
Am I looking at this the wrong way?? To sum it up, my
generateNewPreview operation is the operation that takes time,
resizePreviewWindow depends on it (but also takes time since the re-
sizing is animated) and I have to keep in mind that the user should be
able to mess with the size/brightness etc sliders even while those
operations are running...
Jean-Nicolas Jolivet
[EMAIL PROTECTED]
http://www.silverscripting.com
_______________________________________________
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to [EMAIL PROTECTED]
