Rename and add to iced image module

wgpu/src/renderer/widget/image_viewer.rs

@@ -0,0 +1,39 @@
+use crate::{Primitive, Renderer};
+use iced_native::{image, image_viewer, mouse, Rectangle, Vector};
+
+impl image_viewer::Renderer for Renderer {
+    fn draw(
+        &mut self,
+        state: &image_viewer::State,
+        bounds: Rectangle,
+        image_bounds: Rectangle,
+        offset: (u32, u32),
+        handle: image::Handle,
+        is_mouse_over: bool,
+    ) -> Self::Output {
+        (
+            {
+                Primitive::Clip {
+                    bounds,
+                    offset: Vector::new(offset.0, offset.1),
+                    content: Box::new(Primitive::Image {
+                        handle,
+                        bounds: image_bounds,
+                    }),
+                }
+            },
+            {
+                if state.is_cursor_clicked() {
+                    mouse::Interaction::Grabbing
+                } else if is_mouse_over
+                    && (image_bounds.width > bounds.width
+                        || image_bounds.height > bounds.height)
+                {
+                    mouse::Interaction::Grab
+                } else {
+                    mouse::Interaction::Idle
+                }
+            },
+        )
+    }
+}