feat: added handle to text_input

examples/text_input/Cargo.toml

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+[package]
+name = "text_input"
+version = "0.1.0"
+authors = ["Casper Rogild Storm<casper@rogildstorm.com>"]
+edition = "2021"
+publish = false
+
+[dependencies]
+iced = { path = "../..", features = ["debug"] }

examples/text_input/README.md

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+## TextInput
+
+A `TextInput` is a field that can be filled with text.
+
+You can run it with `cargo run`:
+```
+cargo run --package text_input
+```
+
+[`main`]: src/main.rs

examples/text_input/src/main.rs

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+use iced::widget::{checkbox, column, container, text_input};
+use iced::{Element, Font, Length, Sandbox, Settings};
+
+const ICON_FONT: Font = Font::External {
+    name: "Icons",
+    bytes: include_bytes!("../fonts/icons.ttf"),
+};
+
+pub fn main() -> iced::Result {
+    Example::run(Settings::default())
+}
+
+#[derive(Default)]
+struct Example {
+    value: String,
+    is_showing_handle: bool,
+}
+
+#[derive(Debug, Clone)]
+enum Message {
+    Changed(String),
+    ToggleHandle(bool),
+}
+
+impl Sandbox for Example {
+    type Message = Message;
+
+    fn new() -> Self {
+        Self::default()
+    }
+
+    fn title(&self) -> String {
+        String::from("Text Input - Iced")
+    }
+
+    fn update(&mut self, message: Message) {
+        match message {
+            Message::Changed(value) => self.value = value,
+            Message::ToggleHandle(_) => {
+                self.is_showing_handle = !self.is_showing_handle
+            }
+        }
+    }
+
+    fn view(&self) -> Element<Message> {
+        let checkbox =
+            checkbox("Handle", self.is_showing_handle, Message::ToggleHandle)
+                .spacing(5)
+                .text_size(16);
+
+        let mut text_input =
+            text_input("Placeholder", self.value.as_str(), Message::Changed);
+
+        if self.is_showing_handle {
+            text_input = text_input.handle(text_input::Handle {
+                font: ICON_FONT,
+                text: String::from('\u{e900}'),
+                size: Some(18),
+                position: text_input::HandlePosition::Right,
+            });
+        }
+
+        let content = column!["What is blazing fast?", text_input, checkbox]
+            .width(Length::Units(200))
+            .spacing(10);
+
+        container(content)
+            .width(Length::Fill)
+            .height(Length::Fill)
+            .center_x()
+            .center_y()
+            .into()
+    }
+
+    fn theme(&self) -> iced::Theme {
+        iced::Theme::default()
+    }
+
+    fn style(&self) -> iced::theme::Application {
+        iced::theme::Application::default()
+    }
+
+    fn scale_factor(&self) -> f64 {
+        1.0
+    }
+
+    fn run(settings: Settings<()>) -> Result<(), iced::Error>
+    where
+        Self: 'static + Sized,
+    {
+        <Self as iced::Application>::run(settings)
+    }
+}