diff options
Diffstat (limited to 'native/src/widget/image.rs')
-rw-r--r-- | native/src/widget/image.rs | 74 |
1 files changed, 48 insertions, 26 deletions
diff --git a/native/src/widget/image.rs b/native/src/widget/image.rs index de0ffbc0..8e7a28e5 100644 --- a/native/src/widget/image.rs +++ b/native/src/widget/image.rs @@ -65,6 +65,46 @@ impl<Handle> Image<Handle> { } } +/// Computes the layout of an [`Image`]. +pub fn layout<Renderer, Handle>( + renderer: &Renderer, + limits: &layout::Limits, + handle: &Handle, + width: Length, + height: Length, + content_fit: ContentFit, +) -> layout::Node +where + Renderer: image::Renderer<Handle = Handle>, +{ + // The raw w/h of the underlying image + let image_size = { + let (width, height) = renderer.dimensions(handle); + + Size::new(width as f32, height as f32) + }; + + // The size to be available to the widget prior to `Shrink`ing + let raw_size = limits.width(width).height(height).resolve(image_size); + + // The uncropped size of the image when fit to the bounds above + let full_size = content_fit.fit(image_size, raw_size); + + // Shrink the widget to fit the resized image, if requested + let final_size = Size { + width: match width { + Length::Shrink => f32::min(raw_size.width, full_size.width), + _ => raw_size.width, + }, + height: match height { + Length::Shrink => f32::min(raw_size.height, full_size.height), + _ => raw_size.height, + }, + }; + + layout::Node::new(final_size) +} + impl<Message, Renderer, Handle> Widget<Message, Renderer> for Image<Handle> where Renderer: image::Renderer<Handle = Handle>, @@ -83,32 +123,14 @@ where renderer: &Renderer, limits: &layout::Limits, ) -> layout::Node { - // The raw w/h of the underlying image - let (width, height) = renderer.dimensions(&self.handle); - let image_size = Size::new(width as f32, height as f32); - - // The size to be available to the widget prior to `Shrink`ing - let raw_size = limits - .width(self.width) - .height(self.height) - .resolve(image_size); - - // The uncropped size of the image when fit to the bounds above - let full_size = self.content_fit.fit(image_size, raw_size); - - // Shrink the widget to fit the resized image, if requested - let final_size = Size { - width: match self.width { - Length::Shrink => f32::min(raw_size.width, full_size.width), - _ => raw_size.width, - }, - height: match self.height { - Length::Shrink => f32::min(raw_size.height, full_size.height), - _ => raw_size.height, - }, - }; - - layout::Node::new(final_size) + layout( + renderer, + limits, + &self.handle, + self.width, + self.height, + self.content_fit, + ) } fn draw( |