message: Add instructions to `bezier_tool` example
diff: @@ -11,8 +11,9 @@ mod bezier {
  // if you wish to, by creating your own `Renderer` trait, which could be
  // implemented by `iced_wgpu` and other renderers.
  use iced_native::{
  - input, layout, Clipboard, Element, Event, Hasher, Layout, Length,
  - MouseCursor, Point, Size, Vector, Widget,
  + input, layout, Clipboard, Color, Element, Event, Font, Hasher,
  + HorizontalAlignment, Layout, Length, MouseCursor, Point, Size, Vector,
  + VerticalAlignment, Widget,
  };
  use iced_wgpu::{
  triangle::{Mesh2D, Vertex2D},
  @@ -89,7 +90,7 @@ mod bezier {
  fn draw(
  &self,
  _renderer: &mut Renderer,
  - _defaults: &Defaults,
  + defaults: &Defaults,
  layout: Layout<'_>,
  cursor_position: Point,
  ) -> (Primitive, MouseCursor) {
  @@ -185,14 +186,42 @@ mod bezier {
  )
  .unwrap();
  + let mesh = Primitive::Mesh2D(Arc::new(Mesh2D {
  + vertices: buffer.vertices,
  + indices: buffer.indices,
  + }));
  +
  (
  Primitive::Clip {
  bounds,
  offset: Vector::new(0, 0),
  - content: Box::new(Primitive::Mesh2D(Arc::new(Mesh2D {
  - vertices: buffer.vertices,
  - indices: buffer.indices,
  - }))),
  + content: Box::new(
  + if self.curves.is_empty()
  + && self.state.pending.is_none()
  + {
  + let instructions = Primitive::Text {
  + bounds,
  + color: Color {
  + a: defaults.text.color.a * 0.7,
  + ..defaults.text.color
  + },
  + content: String::from(
  + "Click to create bezier curves!",
  + ),
  + font: Font::Default,
  + size: 30.0,
  + horizontal_alignment:
  + HorizontalAlignment::Center,
  + vertical_alignment: VerticalAlignment::Center,
  + };
  +
  + Primitive::Group {
  + primitives: vec![mesh, instructions],
  + }
  + } else {
  + mesh
  + },
  + ),
  },
  MouseCursor::OutOfBounds,
  )
  