Add `integration` example

It showcases how to integrate iced in an existing graphical application.

1 files changed, 102 insertions, 0 deletions

diff --git a/examples/integration/src/controls.rs b/examples/integration/src/controls.rs
new file mode 100644
index 00000000..0457a058
--- /dev/null
+++ b/examples/integration/src/controls.rs
@@ -0,0 +1,102 @@
+use crate::Scene;
+
+use iced_wgpu::Renderer;
+use iced_winit::{
+    slider, Align, Color, Column, Element, Length, Row, Slider, Text,
+};
+
+pub struct Controls {
+    sliders: [slider::State; 3],
+}
+
+#[derive(Debug)]
+pub enum Message {
+    BackgroundColorChanged(Color),
+}
+
+impl Controls {
+    pub fn new() -> Controls {
+        Controls {
+            sliders: Default::default(),
+        }
+    }
+
+    pub fn update(&self, message: Message, scene: &mut Scene) {
+        match message {
+            Message::BackgroundColorChanged(color) => {
+                scene.background_color = color;
+            }
+        }
+    }
+
+    pub fn view<'a>(
+        &'a mut self,
+        scene: &Scene,
+    ) -> Element<'a, Message, Renderer> {
+        let [r, g, b] = &mut self.sliders;
+        let background_color = scene.background_color;
+
+        let sliders = Row::new()
+            .width(Length::Units(500))
+            .spacing(20)
+            .push(Slider::new(
+                r,
+                0.0..=1.0,
+                scene.background_color.r,
+                move |r| {
+                    Message::BackgroundColorChanged(Color {
+                        r,
+                        ..background_color
+                    })
+                },
+            ))
+            .push(Slider::new(
+                g,
+                0.0..=1.0,
+                scene.background_color.g,
+                move |g| {
+                    Message::BackgroundColorChanged(Color {
+                        g,
+                        ..background_color
+                    })
+                },
+            ))
+            .push(Slider::new(
+                b,
+                0.0..=1.0,
+                scene.background_color.b,
+                move |b| {
+                    Message::BackgroundColorChanged(Color {
+                        b,
+                        ..background_color
+                    })
+                },
+            ));
+
+        Row::new()
+            .width(Length::Fill)
+            .height(Length::Fill)
+            .align_items(Align::End)
+            .push(
+                Column::new()
+                    .width(Length::Fill)
+                    .align_items(Align::End)
+                    .push(
+                        Column::new()
+                            .padding(10)
+                            .spacing(10)
+                            .push(
+                                Text::new("Background color")
+                                    .color(Color::WHITE),
+                            )
+                            .push(sliders)
+                            .push(
+                                Text::new(format!("{:?}", background_color))
+                                    .size(14)
+                                    .color(Color::WHITE),
+                            ),
+                    ),
+            )
+            .into()
+    }
+}