Add canvas submodule
Getty Ritter
5 years ago
| 1 | use gdk; | |
| 2 | use gtk::{ | |
| 3 | self, | |
| 4 | WidgetExt | |
| 5 | }; | |
| 6 | use std::cell::RefCell; | |
| 7 | use std::rc::Rc; | |
| 8 | ||
| 9 | pub struct GridCanvas { | |
| 10 | pub canvas: gtk::DrawingArea, | |
| 11 | pub mouse_loc: Rc<RefCell<Option<(i32, i32)>>>, | |
| 12 | } | |
| 13 | ||
| 14 | impl GridCanvas { | |
| 15 | pub fn new() -> GridCanvas { | |
| 16 | let canvas = gtk::DrawingArea::new(); | |
| 17 | let mouse_loc = Rc::new(RefCell::new(Some((2, 2)))); | |
| 18 | let reader_mouse = mouse_loc.clone(); | |
| 19 | let writer_mouse = mouse_loc.clone(); | |
| 20 | ||
| 21 | canvas.connect_draw(move |cv, ctx| { | |
| 22 | let w = cv.get_allocated_width(); | |
| 23 | let h = cv.get_allocated_height(); | |
| 24 | ctx.set_source_rgb(1.0, 1.0, 1.0); | |
| 25 | ctx.rectangle(0.0, 0.0, w as f64, h as f64); | |
| 26 | ctx.fill(); | |
| 27 | ||
| 28 | ctx.set_source_rgb(0.9, 0.9, 0.9); | |
| 29 | reader_mouse.borrow().map(|(x, y)| { | |
| 30 | ctx.rectangle(x as f64 * 32.0, y as f64 * 32.0, 32.0, 32.0); | |
| 31 | ctx.fill(); | |
| 32 | }); | |
| 33 | ||
| 34 | ctx.set_source_rgb(0.8, 0.8, 0.8); | |
| 35 | for x in 0..((w / 32) + 1) { | |
| 36 | ctx.move_to(x as f64 * 32.0, 0.0); | |
| 37 | ctx.line_to(x as f64 * 32.0, h as f64); | |
| 38 | ctx.stroke(); | |
| 39 | } | |
| 40 | for y in 0..((h / 32) + 1) { | |
| 41 | ctx.move_to(0.0, y as f64 * 32.0); | |
| 42 | ctx.line_to(w as f64, y as f64 * 32.0); | |
| 43 | ctx.stroke(); | |
| 44 | } | |
| 45 | gtk::Inhibit(false) | |
| 46 | }); | |
| 47 | ||
| 48 | canvas.connect_motion_notify_event(move |cv, motion| { | |
| 49 | let (x, y) = motion.get_position(); | |
| 50 | *writer_mouse.borrow_mut() = Some((x as i32 / 32, y as i32 / 32)); | |
| 51 | cv.queue_draw(); | |
| 52 | gtk::Inhibit(false) | |
| 53 | }); | |
| 54 | ||
| 55 | canvas.add_events(gdk::POINTER_MOTION_MASK.bits() as i32); | |
| 56 | ||
| 57 | GridCanvas { | |
| 58 | canvas, | |
| 59 | mouse_loc, | |
| 60 | } | |
| 61 | } | |
| 62 | } |