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-rw-r--r--graphics/Cargo.toml2
-rw-r--r--graphics/src/widget/image.rs5
-rw-r--r--graphics/src/widget/image/viewer.rs55
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
+ }
+ },
+ )
+ }
+}