feat(button): add ImageButton widget variant

src/widget/button/image.rs

@@ -0,0 +1,72 @@
+// Copyright 2023 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+use super::{Builder, Style};
+use crate::{
+    widget::{self, image::Handle},
+    Element,
+};
+use apply::Apply;
+use iced_core::{font::Weight, widget::Id, Length, Padding};
+use std::borrow::Cow;
+
+pub type Button<'a, Message> = Builder<'a, Message, Image<'a, Handle>>;
+
+pub fn image<'a, Message>(handle: impl Into<Handle> + 'a) -> Button<'a, Message> {
+    Button::new(Image {
+        image: widget::image(handle).border_radius([9.0; 4]),
+        selected: false,
+    })
+}
+
+pub struct Image<'a, Handle> {
+    image: widget::Image<'a, Handle>,
+    selected: bool,
+}
+
+impl<'a, Message> Button<'a, Message> {
+    pub fn new(variant: Image<'a, Handle>) -> Self {
+        Self {
+            id: Id::unique(),
+            label: Cow::Borrowed(""),
+            tooltip: Cow::Borrowed(""),
+            on_press: None,
+            width: Length::Shrink,
+            height: Length::Shrink,
+            padding: Padding::from(0),
+            spacing: 0,
+            icon_size: 16,
+            line_height: 20,
+            font_size: 14,
+            font_weight: Weight::Normal,
+            style: Style::Image,
+            variant,
+        }
+    }
+
+    pub fn selected(mut self, selected: bool) -> Self {
+        self.variant.selected = selected;
+        self
+    }
+}
+
+impl<'a, Message> From<Button<'a, Message>> for Element<'a, Message>
+where
+    Handle: Clone + std::hash::Hash,
+    Message: Clone + 'static,
+{
+    fn from(builder: Button<'a, Message>) -> Element<'a, Message> {
+        builder
+            .variant
+            .image
+            .width(builder.width)
+            .height(builder.height)
+            .apply(widget::button)
+            .selected(builder.variant.selected)
+            .id(builder.id)
+            .padding(0)
+            .on_press_maybe(builder.on_press)
+            .style(builder.style)
+            .into()
+    }
+}