Welcome!
This is the community forum for my apps Pythonista and Editorial.
For individual support questions, you can also send an email. If you have a very short question or just want to say hello — I'm @olemoritz on Twitter.
canvas XOR scene?
-
Can you use canvas and scene objects together? I like that complex objects can be built up using a canvas object (e.g. add_quad_curve/fill_path). However, I'd like to interact with the drawing as well using a scene (e.g. touch_began). Any suggestions as to how I can "have my cake and eat it too"?
-
At the moment, no. You can use the <a href="http://omz-software.com/pythonista/docs/ios/ImageDraw.html">ImageDraw module</a> to build images dynamically that can then be loaded into a scene with <a href="http://omz-software.com/pythonista/docs/ios/scene.html#scene.load_pil_image">load_pil_image</a>.
However, ImageDraw doesn't support antialiasing or bezier curves, only relatively simple shapes, lines, and text. You could probably emulate anti-aliasing relatively well by drawing into a larger image and then <a href="http://omz-software.com/pythonista/docs/ios/Image.html#Image.Image.resize">scaling it down</a> with the Image.ANTIALIAS filter. Bezier curves would be possible by calculating all the line segments manually, using <a href="http://en.wikipedia.org/wiki/Bézier_curve">some math</a>, but it's probably quite a hassle to do that...
-
Do you think getting them to "play nice" together could happen anytime soon?
If the missing drawing ops, found in 'canvas' could move over into 'scene' then 'canvas' could get dropped/deprecated. It's ok if all apps start as console-mode and require a 'scene' for drawing+interaction.
Otherwise, it would be great to just add those wonderful "missing" drawing ops into 'scene'.
-
I plan to overhaul the canvas module to work better with others (mostly PIL and scene). Basically, I want canvas to work more like PIL, i.e. allow multiple canvasses that can be drawn to and saved as images etc. I can't say yet when I'll get to that, I'm pretty busy with some other things at the moment, but it's on my radar.
