Hi Samuh, I think you're on the right "path". Cheers, James
On Wed, Oct 7, 2009 at 11:42 PM, Samuh Varta <samuh.va...@gmail.com> wrote: > > @Romain: thanks for your reply...I'd *like* to believe that you wrote > FingerPaint and would help me here :) > > Most of the applications in the Android Market(PicSay et al.) that > provide a similar feature(drawing strokes on canvas) provide Undo > functionality. I was trying to imitate the same in the original > FingerPaint app. > > My approach to implementing this feature,as already mentioned in the > earlier post, would be to: > 1. memorize all the paths, > 2. reset the canvas and > 3. redraw all the paths again expect the last one. > > I was wondering if there was any alternative to this? Is there any > class in the framework that can help me here? > > Please help. > > Thanks again! > > > On Oct 7, 9:34 pm, Romain Guy <romain...@google.com> wrote: > > save() and restore() are just used to save the state of the Canvas > > (translate, scale, etc.) It won't help you for what you want. > > > > > > > > > > > > On Wed, Oct 7, 2009 at 12:26 AM, Samuh Varta <samuh.va...@gmail.com> > wrote: > > > I am playing with the FingerPaint application that comes bundled with > the > > > API demos package. I was wondering if I could add an "Undo" feature to > it, > > > which would allow the user to remove/undo his latest stroke drawing > from the > > > canvas. I am not sure of how to achieve this though. > > > > > I was looking at the android.graphics.Canvas class and therein I found > a few > > > methods that caught my interest. > > > canvas.restore() and canvas.save(). But I couldn't get them to work per > my > > > requirement. > > > > > One of the approach could be memorizing all the Path(representing > strokes > > > drawn) and then resetting the canvas and reapinting all the stroked one > by > > > one except the latest. I somehow dont like this approach. > > > How do I undo my drawings on canvas? > > > Please help. > > > > > Thanks. > > > > -- > > Romain Guy > > Android framework engineer > > romain...@android.com > > > > Note: please don't send private questions to me, as I don't have time > > to provide private support. All such questions should be posted on > > public forums, where I and others can see and answer them- Hide quoted > text - > > > > - Show quoted text - > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" group. To post to this group, send email to android-beginners@googlegroups.com To unsubscribe from this group, send email to android-beginners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
