pixelab_core/
backend.rs

1use crate::{Area, Bitmap, Color, Handler, PixelabError, Point};
2
3pub struct Backend {
4    pub bitmap: Option<Box<dyn Bitmap + 'static>>,
5    pub bitmap_type: Option<Box<dyn Bitmap + 'static>>,
6    pub position: Point,
7    pub area: Area,
8    pub enable: bool,
9    pub visible: bool,
10    pub background_color: Color,
11    pub handle_all_event: bool,
12    pub on_press: Option<Box<dyn FnMut(Point, &mut Handler, &mut Backend)>>,
13    pub on_motion: Option<Box<dyn FnMut(Point, &mut Handler, &mut Backend)>>,
14    pub on_release: Option<Box<dyn FnMut(Point, &mut Handler, &mut Backend)>>,
15    pub on_message: Option<Box<dyn FnMut(&'static str, &mut Handler, &mut Backend)>>,
16}
17impl Backend {
18    pub fn new() -> Self {
19        Self {
20            bitmap: None,
21            bitmap_type: None,
22            position: Point::new(0, 0),
23            area: Area::default(),
24            enable: true,
25            visible: true,
26            background_color: Color::white(),
27            handle_all_event: true,
28            on_press: None,
29            on_motion: None,
30            on_release: None,
31            on_message: None,
32        }
33    }
34
35    pub fn set_size(&mut self, width: u16, height: u16) {
36        self.area.width = width;
37        self.area.height = height;
38    }
39
40    pub fn create_buffer(&mut self) -> Result<(), PixelabError> {
41        match self.bitmap_type.take() {
42            Some(bitmap_type) => {
43                self.bitmap = Some(bitmap_type.create(self.area));
44                self.bitmap_type = Some(bitmap_type);
45                Ok(())
46            }
47            None => Err(PixelabError::BitmapTypeIsNone),
48        }
49    }
50
51    pub fn destroy_buffer(&mut self) {
52        self.bitmap = None
53    }
54
55    pub fn overlay(&mut self, fb: &mut Box<dyn Bitmap + 'static>) -> Result<(), PixelabError> {
56        match self.bitmap.take() {
57            Some(mut buffer) => {
58                fb.overlay(&mut buffer, self.position)?;
59                self.bitmap = Some(buffer);
60                Ok(())
61            }
62            None => Err(PixelabError::BitmapBufferNotCreated),
63        }
64    }
65
66    pub fn set_pixel(&mut self, point: Point, color: Color) -> Result<(), PixelabError> {
67        match self.bitmap.take() {
68            Some(mut buffer) => {
69                buffer.set_pixel(point, color)?;
70                self.bitmap = Some(buffer);
71                Ok(())
72            }
73            None => Err(PixelabError::BitmapBufferNotCreated),
74        }
75    }
76
77    pub fn clear(&mut self, color: Color) -> Result<(), PixelabError> {
78        match self.bitmap.take() {
79            Some(mut buffer) => {
80                buffer.fill(color)?;
81                self.bitmap = Some(buffer);
82                Ok(())
83            }
84            None => Err(PixelabError::BitmapBufferNotCreated),
85        }
86    }
87
88    pub fn set_position(&mut self, x: u16, y: u16) {
89        self.position.x = x;
90        self.position.y = y;
91    }
92    pub fn check_scope(&mut self, point: Point) -> bool {
93        if point.x > self.position.x && point.x < self.position.x + self.area.width {
94            if point.y > self.position.y && point.y < self.position.y + self.area.height {
95                return true;
96            }
97        }
98        false
99    }
100    pub fn on_press(&mut self, f: impl 'static + FnMut(Point, &mut Handler, &mut Backend)) {
101        self.on_press = Some(Box::new(f));
102    }
103    pub fn on_motion(&mut self, f: impl 'static + FnMut(Point, &mut Handler, &mut Backend)) {
104        self.on_motion = Some(Box::new(f));
105    }
106    pub fn on_release(&mut self, f: impl 'static + FnMut(Point, &mut Handler, &mut Backend)) {
107        self.on_release = Some(Box::new(f));
108    }
109    pub fn on_message<F>(
110        &mut self,
111        f: impl 'static + FnMut(&'static str, &mut Handler, &mut Backend),
112    ) {
113        self.on_message = Some(Box::new(f));
114    }
115}
pixelab_core/backend.rs

pixelab_core/
backend.rs
