diff options
Diffstat (limited to 'graphics')
-rw-r--r-- | graphics/Cargo.toml | 2 | ||||
-rw-r--r-- | graphics/src/widget/image.rs | 5 | ||||
-rw-r--r-- | graphics/src/widget/image/viewer.rs | 55 |
3 files changed, 60 insertions, 2 deletions
diff --git a/graphics/Cargo.toml b/graphics/Cargo.toml index 73dc47bf..aac9ccf2 100644 --- a/graphics/Cargo.toml +++ b/graphics/Cargo.toml @@ -44,7 +44,7 @@ version = "0.12" optional = true [dependencies.font-kit] -version = "0.8" +version = "0.10" optional = true [package.metadata.docs.rs] diff --git a/graphics/src/widget/image.rs b/graphics/src/widget/image.rs index 30f446e8..bdf03de3 100644 --- a/graphics/src/widget/image.rs +++ b/graphics/src/widget/image.rs @@ -1,11 +1,14 @@ //! Display images in your user interface. +pub mod viewer; + use crate::backend::{self, Backend}; + use crate::{Primitive, Renderer}; use iced_native::image; use iced_native::mouse; use iced_native::Layout; -pub use iced_native::image::{Handle, Image}; +pub use iced_native::image::{Handle, Image, Viewer}; impl<B> image::Renderer for Renderer<B> where diff --git a/graphics/src/widget/image/viewer.rs b/graphics/src/widget/image/viewer.rs new file mode 100644 index 00000000..28dffc4f --- /dev/null +++ b/graphics/src/widget/image/viewer.rs @@ -0,0 +1,55 @@ +//! Zoom and pan on an image. +use crate::backend::{self, Backend}; +use crate::{Primitive, Renderer}; + +use iced_native::image; +use iced_native::image::viewer; +use iced_native::mouse; +use iced_native::{Rectangle, Size, Vector}; + +impl<B> viewer::Renderer for Renderer<B> +where + B: Backend + backend::Image, +{ + fn draw( + &mut self, + state: &viewer::State, + bounds: Rectangle, + image_size: Size, + translation: Vector, + handle: image::Handle, + is_mouse_over: bool, + ) -> Self::Output { + ( + { + Primitive::Clip { + bounds, + content: Box::new(Primitive::Translate { + translation, + content: Box::new(Primitive::Image { + handle, + bounds: Rectangle { + x: bounds.x, + y: bounds.y, + ..Rectangle::with_size(image_size) + }, + }), + }), + offset: Vector::new(0, 0), + } + }, + { + if state.is_cursor_grabbed() { + mouse::Interaction::Grabbing + } else if is_mouse_over + && (image_size.width > bounds.width + || image_size.height > bounds.height) + { + mouse::Interaction::Grab + } else { + mouse::Interaction::Idle + } + }, + ) + } +} |