semi-working dib

src/elements/div.rs

@@ -0,0 +1,50 @@
+use std::sync::Arc;
+
+use crate::{
+    render::RenderScope,
+    widget::{Element, Widget},
+};
+
+pub struct Div(Vec<Arc<Widget>>);
+
+impl Element for Div {
+    fn render(&mut self, scope_parent: &mut crate::render::RenderScope) {
+        let (w, h) = scope_parent.get_size_or_parent();
+        let mut scope = RenderScope::new(w, h);
+
+        for elem in &self.0 {
+            scope.clear();
+
+            if let Some(t) = elem.get() {
+                scope.set_transform(&t);
+            }
+
+            elem.0.lock().unwrap().render(&mut scope);
+
+            if let Some(t) = elem.get() {
+                scope.set_transform(&t);
+            }
+
+            scope.draw_buf(scope_parent.get_buffer_mut());
+        }
+    }
+
+    fn as_any(&self) -> &dyn std::any::Any {
+        self
+    }
+
+    fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
+        self
+    }
+}
+
+impl Div {
+    pub fn new() -> Self {
+        Self(Vec::new())
+    }
+
+    pub fn draw<E: Element + 'static>(&mut self, element: E) -> &Arc<Widget> {
+        self.0.push(Arc::new(Widget::new(Box::new(element))));
+        self.0.last().unwrap()
+    }
+}

src/elements/mod.rs

@@ -1,3 +1,5 @@
+pub mod div;
+
 use crate::widget::Element;
 
 pub struct Rect;

src/main.rs

@@ -1,5 +1,7 @@
 use minifb::{Window, WindowOptions};
-use osgui::{extensions::velocity::VelocityExtension, style::Transform, Screen};
+use osgui::{
+    elements::div::Div, extensions::velocity::VelocityExtension, style::Transform, Screen,
+};
 
 fn main() {
     let window = Window::new(
@@ -16,7 +18,13 @@ fn main() {
     let mut app = Screen::new(window);
     app.extension(VelocityExtension);
 
-    app.draw("test".to_string()).component(Transform::center());
+    let mut d = Div::new();
+
+    d.draw("test".to_string());
+    d.draw("abc".to_string());
+
+    app.draw(d)
+        .component(Transform::center().dimensions(150, 80));
 
     app.run().unwrap();
 }

src/render.rs

@@ -7,7 +7,8 @@ use crate::{
 
 const FONT: &[u8] = include_bytes!("../assets/DejaVuSans.ttf");
 
-enum RenderMethod {
+#[derive(Debug, Clone)]
+pub enum RenderMethod {
     Text(String, usize, usize, f32, u32),
     Rectangle(usize, usize, usize, usize, u32),
 }
@@ -53,15 +54,19 @@ impl RenderScope {
     }
 
     pub fn draw(&mut self) {
+        let mut b = self.buffer.clone();
+        self.draw_buf(&mut b);
+        self.buffer = b;
+    }
+
+    pub fn draw_buf(&mut self, buf: &mut Vec<u32>) {
         for m in &self.render_stack {
             match m {
                 &RenderMethod::Rectangle(pos_x, pos_y, width, height, color) => {
                     for x in self.transform.x + pos_x..self.transform.x + pos_x + width {
                         for y in self.transform.y + pos_y..self.transform.y + pos_y + height {
-                            if self.buffer.len() > y * self.parent_height + x
-                                && self.parent_width > x
-                            {
-                                self.buffer[y * self.parent_height + x] = color;
+                            if buf.len() > y * self.parent_height + x && self.parent_width > x {
+                                buf[y * self.parent_height + x] = color;
                             }
                         }
                     }
@@ -101,7 +106,7 @@ impl RenderScope {
                                     let g = (g_base * v) as u32;
                                     let b = (b_base * v) as u32;
                                     let color = (r << 16) | (g << 8) | b;
-                                    self.buffer[index] = color;
+                                    buf[index] = color;
                                 }
                             });
                         }
@@ -121,6 +126,21 @@ impl RenderScope {
         (self.transform.width, self.transform.height)
     }
 
+    pub fn get_size_or_parent(&self) -> (usize, usize) {
+        (
+            if self.transform.width > 0 {
+                self.transform.width
+            } else {
+                self.parent_width
+            },
+            if self.transform.height > 0 {
+                self.transform.height
+            } else {
+                self.parent_height
+            },
+        )
+    }
+
     pub fn get_parent_size(&self) -> (usize, usize) {
         (self.parent_width, self.parent_height)
     }
@@ -128,4 +148,8 @@ impl RenderScope {
     pub fn get_buffer(&self) -> Vec<u32> {
         self.buffer.clone()
     }
+
+    pub fn get_buffer_mut(&mut self) -> &mut Vec<u32> {
+        &mut self.buffer
+    }
 }