Integrate diagnostic decorations and current-source Text input boundaries
This commit is contained in:
+418
@@ -0,0 +1,418 @@
|
||||
//! Images display raster graphics in different formats (PNG, JPG, etc.).
|
||||
//!
|
||||
//! # Example
|
||||
//! ```no_run
|
||||
//! # mod iced { pub mod widget { pub use iced_widget::*; } }
|
||||
//! # pub type State = ();
|
||||
//! # pub type Element<'a, Message> = iced_widget::core::Element<'a, Message, iced_widget::Theme, iced_widget::Renderer>;
|
||||
//! use iced::widget::image;
|
||||
//!
|
||||
//! enum Message {
|
||||
//! // ...
|
||||
//! }
|
||||
//!
|
||||
//! fn view(state: &State) -> Element<'_, Message> {
|
||||
//! image("ferris.png").into()
|
||||
//! }
|
||||
//! ```
|
||||
//! <img src="https://github.com/iced-rs/iced/blob/9712b319bb7a32848001b96bd84977430f14b623/examples/resources/ferris.png?raw=true" width="300">
|
||||
pub mod viewer;
|
||||
pub use viewer::Viewer;
|
||||
|
||||
use crate::core::border;
|
||||
use crate::core::image;
|
||||
use crate::core::layout;
|
||||
use crate::core::mouse;
|
||||
use crate::core::renderer;
|
||||
use crate::core::widget::Tree;
|
||||
use crate::core::{
|
||||
ContentFit, Element, Layout, Length, Point, Rectangle, Rotation, Size,
|
||||
Vector, Widget,
|
||||
};
|
||||
|
||||
pub use image::{FilterMethod, Handle};
|
||||
|
||||
/// Creates a new [`Viewer`] with the given image `Handle`.
|
||||
pub fn viewer<Handle>(handle: Handle) -> Viewer<Handle> {
|
||||
Viewer::new(handle)
|
||||
}
|
||||
|
||||
/// A frame that displays an image while keeping aspect ratio.
|
||||
///
|
||||
/// # Example
|
||||
/// ```no_run
|
||||
/// # mod iced { pub mod widget { pub use iced_widget::*; } }
|
||||
/// # pub type State = ();
|
||||
/// # pub type Element<'a, Message> = iced_widget::core::Element<'a, Message, iced_widget::Theme, iced_widget::Renderer>;
|
||||
/// use iced::widget::image;
|
||||
///
|
||||
/// enum Message {
|
||||
/// // ...
|
||||
/// }
|
||||
///
|
||||
/// fn view(state: &State) -> Element<'_, Message> {
|
||||
/// image("ferris.png").into()
|
||||
/// }
|
||||
/// ```
|
||||
/// <img src="https://github.com/iced-rs/iced/blob/9712b319bb7a32848001b96bd84977430f14b623/examples/resources/ferris.png?raw=true" width="300">
|
||||
pub struct Image<Handle = image::Handle> {
|
||||
handle: Handle,
|
||||
width: Length,
|
||||
height: Length,
|
||||
crop: Option<Rectangle<u32>>,
|
||||
border_radius: border::Radius,
|
||||
content_fit: ContentFit,
|
||||
filter_method: FilterMethod,
|
||||
rotation: Rotation,
|
||||
opacity: f32,
|
||||
scale: f32,
|
||||
expand: bool,
|
||||
}
|
||||
|
||||
impl<Handle> Image<Handle> {
|
||||
/// Creates a new [`Image`] with the given path.
|
||||
pub fn new(handle: impl Into<Handle>) -> Self {
|
||||
Image {
|
||||
handle: handle.into(),
|
||||
width: Length::Shrink,
|
||||
height: Length::Shrink,
|
||||
crop: None,
|
||||
border_radius: border::Radius::default(),
|
||||
content_fit: ContentFit::default(),
|
||||
filter_method: FilterMethod::default(),
|
||||
rotation: Rotation::default(),
|
||||
opacity: 1.0,
|
||||
scale: 1.0,
|
||||
expand: false,
|
||||
}
|
||||
}
|
||||
|
||||
/// Sets the width of the [`Image`] boundaries.
|
||||
pub fn width(mut self, width: impl Into<Length>) -> Self {
|
||||
self.width = width.into();
|
||||
self
|
||||
}
|
||||
|
||||
/// Sets the height of the [`Image`] boundaries.
|
||||
pub fn height(mut self, height: impl Into<Length>) -> Self {
|
||||
self.height = height.into();
|
||||
self
|
||||
}
|
||||
|
||||
/// Sets whether the [`Image`] should try to fill as much space
|
||||
/// available as possible while keeping aspect ratio and without
|
||||
/// allocating extra space in any axis with a [`Length::Shrink`]
|
||||
/// sizing strategy.
|
||||
///
|
||||
/// This is similar to using [`Length::Fill`] for both the
|
||||
/// [`width`](Self::width) and the [`height`](Self::height),
|
||||
/// but without the downside of blank space.
|
||||
pub fn expand(mut self, expand: bool) -> Self {
|
||||
self.expand = expand;
|
||||
self
|
||||
}
|
||||
|
||||
/// Sets the [`ContentFit`] of the [`Image`].
|
||||
///
|
||||
/// Defaults to [`ContentFit::Contain`]
|
||||
pub fn content_fit(mut self, content_fit: ContentFit) -> Self {
|
||||
self.content_fit = content_fit;
|
||||
self
|
||||
}
|
||||
|
||||
/// Sets the [`FilterMethod`] of the [`Image`].
|
||||
pub fn filter_method(mut self, filter_method: FilterMethod) -> Self {
|
||||
self.filter_method = filter_method;
|
||||
self
|
||||
}
|
||||
|
||||
/// Applies the given [`Rotation`] to the [`Image`].
|
||||
pub fn rotation(mut self, rotation: impl Into<Rotation>) -> Self {
|
||||
self.rotation = rotation.into();
|
||||
self
|
||||
}
|
||||
|
||||
/// Sets the opacity of the [`Image`].
|
||||
///
|
||||
/// It should be in the [0.0, 1.0] range—`0.0` meaning completely transparent,
|
||||
/// and `1.0` meaning completely opaque.
|
||||
pub fn opacity(mut self, opacity: impl Into<f32>) -> Self {
|
||||
self.opacity = opacity.into();
|
||||
self
|
||||
}
|
||||
|
||||
/// Sets the scale of the [`Image`].
|
||||
///
|
||||
/// The region of the [`Image`] drawn will be scaled from the center by the given scale factor.
|
||||
/// This can be useful to create certain effects and animations, like smooth zoom in / out.
|
||||
pub fn scale(mut self, scale: impl Into<f32>) -> Self {
|
||||
self.scale = scale.into();
|
||||
self
|
||||
}
|
||||
|
||||
/// Crops the [`Image`] to the given region described by the [`Rectangle`] in absolute
|
||||
/// coordinates.
|
||||
///
|
||||
/// Cropping is done before applying any transformation or [`ContentFit`]. In practice,
|
||||
/// this means that cropping an [`Image`] with this method should produce the same result
|
||||
/// as cropping it externally (e.g. with an image editor) and creating a new [`Handle`]
|
||||
/// for the cropped version.
|
||||
///
|
||||
/// However, this method is much more efficient; since it just leverages scissoring during
|
||||
/// rendering and no image cropping actually takes place. Instead, it reuses the existing
|
||||
/// image allocations and should be as efficient as not cropping at all!
|
||||
///
|
||||
/// The `region` coordinates will be clamped to the image dimensions, if necessary.
|
||||
pub fn crop(mut self, region: Rectangle<u32>) -> Self {
|
||||
self.crop = Some(region);
|
||||
self
|
||||
}
|
||||
|
||||
/// Sets the [`border::Radius`] of the [`Image`].
|
||||
///
|
||||
/// Currently, it will only be applied around the rectangular bounding box
|
||||
/// of the [`Image`].
|
||||
pub fn border_radius(
|
||||
mut self,
|
||||
border_radius: impl Into<border::Radius>,
|
||||
) -> Self {
|
||||
self.border_radius = border_radius.into();
|
||||
self
|
||||
}
|
||||
}
|
||||
|
||||
/// Computes the layout of an [`Image`].
|
||||
pub fn layout<Renderer, Handle>(
|
||||
renderer: &Renderer,
|
||||
limits: &layout::Limits,
|
||||
handle: &Handle,
|
||||
width: Length,
|
||||
height: Length,
|
||||
region: Option<Rectangle<u32>>,
|
||||
content_fit: ContentFit,
|
||||
rotation: Rotation,
|
||||
expand: bool,
|
||||
) -> layout::Node
|
||||
where
|
||||
Renderer: image::Renderer<Handle = Handle>,
|
||||
{
|
||||
// The raw w/h of the underlying image
|
||||
let image_size =
|
||||
crop(renderer.measure_image(handle).unwrap_or_default(), region);
|
||||
|
||||
// The rotated size of the image
|
||||
let rotated_size = rotation.apply(image_size);
|
||||
|
||||
// The size to be available to the widget prior to `Shrink`ing
|
||||
let bounds = if expand {
|
||||
limits.width(width).height(height).max()
|
||||
} else {
|
||||
limits.resolve(width, height, rotated_size)
|
||||
};
|
||||
|
||||
// The uncropped size of the image when fit to the bounds above
|
||||
let full_size = content_fit.fit(rotated_size, bounds);
|
||||
|
||||
// Shrink the widget to fit the resized image, if requested
|
||||
let final_size = Size {
|
||||
width: match width {
|
||||
Length::Shrink => f32::min(bounds.width, full_size.width),
|
||||
_ => bounds.width,
|
||||
},
|
||||
height: match height {
|
||||
Length::Shrink => f32::min(bounds.height, full_size.height),
|
||||
_ => bounds.height,
|
||||
},
|
||||
};
|
||||
|
||||
layout::Node::new(final_size)
|
||||
}
|
||||
|
||||
fn drawing_bounds<Renderer, Handle>(
|
||||
renderer: &Renderer,
|
||||
bounds: Rectangle,
|
||||
handle: &Handle,
|
||||
region: Option<Rectangle<u32>>,
|
||||
content_fit: ContentFit,
|
||||
rotation: Rotation,
|
||||
scale: f32,
|
||||
) -> Rectangle
|
||||
where
|
||||
Renderer: image::Renderer<Handle = Handle>,
|
||||
{
|
||||
let original_size = renderer.measure_image(handle).unwrap_or_default();
|
||||
let image_size = crop(original_size, region);
|
||||
let rotated_size = rotation.apply(image_size);
|
||||
let adjusted_fit = content_fit.fit(rotated_size, bounds.size());
|
||||
|
||||
let fit_scale = Vector::new(
|
||||
adjusted_fit.width / rotated_size.width,
|
||||
adjusted_fit.height / rotated_size.height,
|
||||
);
|
||||
|
||||
let final_size = image_size * fit_scale * scale;
|
||||
|
||||
let (crop_offset, final_size) = if let Some(region) = region {
|
||||
let x = region.x.min(original_size.width) as f32;
|
||||
let y = region.y.min(original_size.height) as f32;
|
||||
let width = image_size.width;
|
||||
let height = image_size.height;
|
||||
|
||||
let ratio = Vector::new(
|
||||
original_size.width as f32 / width,
|
||||
original_size.height as f32 / height,
|
||||
);
|
||||
|
||||
let final_size = final_size * ratio;
|
||||
|
||||
let scale = Vector::new(
|
||||
final_size.width / original_size.width as f32,
|
||||
final_size.height / original_size.height as f32,
|
||||
);
|
||||
|
||||
let offset = match content_fit {
|
||||
ContentFit::None => Vector::new(x * scale.x, y * scale.y),
|
||||
_ => Vector::new(
|
||||
((original_size.width as f32 - width) / 2.0 - x) * scale.x,
|
||||
((original_size.height as f32 - height) / 2.0 - y) * scale.y,
|
||||
),
|
||||
};
|
||||
|
||||
(offset, final_size)
|
||||
} else {
|
||||
(Vector::ZERO, final_size)
|
||||
};
|
||||
|
||||
let position = match content_fit {
|
||||
ContentFit::None => Point::new(
|
||||
bounds.x + (rotated_size.width - adjusted_fit.width) / 2.0,
|
||||
bounds.y + (rotated_size.height - adjusted_fit.height) / 2.0,
|
||||
),
|
||||
_ => Point::new(
|
||||
bounds.center_x() - final_size.width / 2.0,
|
||||
bounds.center_y() - final_size.height / 2.0,
|
||||
),
|
||||
};
|
||||
|
||||
Rectangle::new(position + crop_offset, final_size)
|
||||
}
|
||||
|
||||
fn crop(size: Size<u32>, region: Option<Rectangle<u32>>) -> Size<f32> {
|
||||
if let Some(region) = region {
|
||||
Size::new(
|
||||
region.width.min(size.width) as f32,
|
||||
region.height.min(size.height) as f32,
|
||||
)
|
||||
} else {
|
||||
Size::new(size.width as f32, size.height as f32)
|
||||
}
|
||||
}
|
||||
|
||||
/// Draws an [`Image`]
|
||||
pub fn draw<Renderer, Handle>(
|
||||
renderer: &mut Renderer,
|
||||
layout: Layout<'_>,
|
||||
handle: &Handle,
|
||||
crop: Option<Rectangle<u32>>,
|
||||
border_radius: border::Radius,
|
||||
content_fit: ContentFit,
|
||||
filter_method: FilterMethod,
|
||||
rotation: Rotation,
|
||||
opacity: f32,
|
||||
scale: f32,
|
||||
) where
|
||||
Renderer: image::Renderer<Handle = Handle>,
|
||||
Handle: Clone,
|
||||
{
|
||||
let bounds = layout.bounds();
|
||||
let drawing_bounds = drawing_bounds(
|
||||
renderer,
|
||||
bounds,
|
||||
handle,
|
||||
crop,
|
||||
content_fit,
|
||||
rotation,
|
||||
scale,
|
||||
);
|
||||
|
||||
renderer.draw_image(
|
||||
image::Image {
|
||||
handle: handle.clone(),
|
||||
border_radius,
|
||||
filter_method,
|
||||
rotation: rotation.radians(),
|
||||
opacity,
|
||||
snap: true,
|
||||
},
|
||||
drawing_bounds,
|
||||
bounds,
|
||||
);
|
||||
}
|
||||
|
||||
impl<Message, Theme, Renderer, Handle> Widget<Message, Theme, Renderer>
|
||||
for Image<Handle>
|
||||
where
|
||||
Renderer: image::Renderer<Handle = Handle>,
|
||||
Handle: Clone,
|
||||
{
|
||||
fn size(&self) -> Size<Length> {
|
||||
Size {
|
||||
width: self.width,
|
||||
height: self.height,
|
||||
}
|
||||
}
|
||||
|
||||
fn layout(
|
||||
&mut self,
|
||||
_tree: &mut Tree,
|
||||
renderer: &Renderer,
|
||||
limits: &layout::Limits,
|
||||
) -> layout::Node {
|
||||
layout(
|
||||
renderer,
|
||||
limits,
|
||||
&self.handle,
|
||||
self.width,
|
||||
self.height,
|
||||
self.crop,
|
||||
self.content_fit,
|
||||
self.rotation,
|
||||
self.expand,
|
||||
)
|
||||
}
|
||||
|
||||
fn draw(
|
||||
&self,
|
||||
_tree: &Tree,
|
||||
renderer: &mut Renderer,
|
||||
_theme: &Theme,
|
||||
_style: &renderer::Style,
|
||||
layout: Layout<'_>,
|
||||
_cursor: mouse::Cursor,
|
||||
_viewport: &Rectangle,
|
||||
) {
|
||||
draw(
|
||||
renderer,
|
||||
layout,
|
||||
&self.handle,
|
||||
self.crop,
|
||||
self.border_radius,
|
||||
self.content_fit,
|
||||
self.filter_method,
|
||||
self.rotation,
|
||||
self.opacity,
|
||||
self.scale,
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, Message, Theme, Renderer, Handle> From<Image<Handle>>
|
||||
for Element<'a, Message, Theme, Renderer>
|
||||
where
|
||||
Renderer: image::Renderer<Handle = Handle>,
|
||||
Handle: Clone + 'a,
|
||||
{
|
||||
fn from(image: Image<Handle>) -> Element<'a, Message, Theme, Renderer> {
|
||||
Element::new(image)
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user