From cc9a5fc00a1fec0898b7b8268354068a66a6ef12 Mon Sep 17 00:00:00 2001
From: Clark Moody <clark@clarkmoody.com>
Date: Fri, 2 Feb 2024 10:45:37 -0600
Subject: [PATCH] Update QR code example with theme selector

---
 examples/qr_code/src/main.rs | 60 ++++++++++++++++++++++++++++++++----
 1 file changed, 54 insertions(+), 6 deletions(-)

diff --git a/examples/qr_code/src/main.rs b/examples/qr_code/src/main.rs
index 867ebfa415..71a30e3665 100644
--- a/examples/qr_code/src/main.rs
+++ b/examples/qr_code/src/main.rs
@@ -1,6 +1,8 @@
+use iced::color;
+use iced::theme::{Palette, Theme};
 use iced::widget::qr_code::{self, QRCode};
-use iced::widget::{column, container, text, text_input};
-use iced::{Alignment, Color, Element, Length, Sandbox, Settings};
+use iced::widget::{column, container, radio, row, text, text_input};
+use iced::{Alignment, Element, Length, Sandbox, Settings};
 
 pub fn main() -> iced::Result {
     QRGenerator::run(Settings::default())
@@ -10,11 +12,20 @@ pub fn main() -> iced::Result {
 struct QRGenerator {
     data: String,
     qr_code: Option<qr_code::State>,
+    theme: Theme,
+}
+
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+enum ThemeType {
+    Light,
+    Dark,
+    Custom,
 }
 
 #[derive(Debug, Clone)]
 enum Message {
     DataChanged(String),
+    ThemeChanged(ThemeType),
 }
 
 impl Sandbox for QRGenerator {
@@ -41,13 +52,30 @@ impl Sandbox for QRGenerator {
 
                 self.data = data;
             }
+            Message::ThemeChanged(theme) => {
+                self.theme = match theme {
+                    ThemeType::Light => Theme::Light,
+                    ThemeType::Dark => Theme::Dark,
+                    ThemeType::Custom => Theme::custom(
+                        String::from("Custom"),
+                        Palette {
+                            background: color!(0x1d1a05),
+                            text: color!(0xfffbbd),
+                            primary: color!(0xca3c25),
+                            success: color!(0x000000),
+                            danger: color!(0x000000),
+                        },
+                    ),
+                };
+                if self.qr_code.is_some() {
+                    self.qr_code = qr_code::State::new(&self.data).ok();
+                }
+            }
         }
     }
 
     fn view(&self) -> Element<Message> {
-        let title = text("QR Code Generator")
-            .size(70)
-            .style(Color::from([0.5, 0.5, 0.5]));
+        let title = text("QR Code Generator").size(70);
 
         let input =
             text_input("Type the data of your QR code here...", &self.data)
@@ -55,7 +83,23 @@ impl Sandbox for QRGenerator {
                 .size(30)
                 .padding(15);
 
-        let mut content = column![title, input]
+        let choose_theme =
+            [ThemeType::Light, ThemeType::Dark, ThemeType::Custom]
+                .iter()
+                .fold(row![text("Theme:")].spacing(10), |row, theme| {
+                    row.push(radio(
+                        format!("{theme:?}"),
+                        *theme,
+                        Some(match self.theme {
+                            Theme::Light => ThemeType::Light,
+                            Theme::Dark => ThemeType::Dark,
+                            Theme::Custom { .. } => ThemeType::Custom,
+                        }),
+                        Message::ThemeChanged,
+                    ))
+                });
+
+        let mut content = column![title, input, choose_theme]
             .width(700)
             .spacing(20)
             .align_items(Alignment::Center);
@@ -72,4 +116,8 @@ impl Sandbox for QRGenerator {
             .center_y()
             .into()
     }
+
+    fn theme(&self) -> Theme {
+        self.theme.clone()
+    }
 }