Bug fixes:

1) use of windows sub system to avoid terminal
2) use of pathbuf for windows fix
Features:
1) Saving in png file
2) Opening png file

src/crop_window.rs

@@ -9,12 +9,11 @@ use fltk::{
 use image::GenericImageView;
 use std::{
     cell::RefCell,
+    path::PathBuf,
     rc::Rc,
     sync::{Arc, RwLock},
 };
 
-static mut PATH: String = String::new();
-
 /// Window to crop the existing image
 pub(crate) struct CropWindow {
     pub win: Window,
@@ -90,13 +89,9 @@ impl CropWindow {
     /// Call it to show window to crop image
     pub(crate) fn load_to_crop(
         &mut self,
-        path: &str,
+        path: &PathBuf,
         crop_pos: Option<(f64, f64)>,
     ) -> Option<(f64, f64)> {
-        unsafe {
-            PATH = path.to_owned();
-        }
-
         let mut container =
             ImageContainer::new(path, Arc::new(RwLock::new(ImageProperties::new())));
         {

src/draw_thread.rs

@@ -15,7 +15,7 @@ use fltk::{
 
 use std::{
     fs,
-    path::Path,
+    path::{Path, PathBuf},
     sync::{mpsc, Arc, RwLock},
 };
 
@@ -37,6 +37,8 @@ pub(crate) fn spawn_image_thread(
     main_win: &MainWindow,
 ) {
     let mut file_choice = main_win.file_choice.clone();
+    let mut next_btn = main_win.next_btn.clone();
+    let mut back_btn = main_win.back_btn.clone();
     let mut quote = main_win.quote.clone();
     let mut tag = main_win.tag.clone();
     let mut layer_red = main_win.layer_red.clone();
@@ -47,6 +49,7 @@ pub(crate) fn spawn_image_thread(
     let mut tag_position = main_win.tag_position.clone();
     let mut page = main_win.page.clone();
     let mut status = main_win.status.clone();
+    let images_path = Arc::clone(&main_win.images_path);
 
     let mut _container: Option<ImageContainer> = None;
     std::thread::spawn(move || loop {
@@ -56,6 +59,7 @@ pub(crate) fn spawn_image_thread(
                     status.set_label("Loading...");
                     load_image(
                         &mut file_choice,
+                        Arc::clone(&images_path),
                         None,
                         &mut quote,
                         &mut tag,
@@ -74,8 +78,12 @@ pub(crate) fn spawn_image_thread(
                 }
                 DrawMessage::ChangeCrop((x, y)) => {
                     status.set_label("Loading...");
+                    file_choice.deactivate();
+                    next_btn.deactivate();
+                    back_btn.deactivate();
                     load_image(
                         &mut file_choice,
+                        Arc::clone(&images_path),
                         Some((x, y)),
                         &mut quote,
                         &mut tag,
@@ -90,6 +98,9 @@ pub(crate) fn spawn_image_thread(
                         &properties,
                         &mut _container,
                     );
+                    file_choice.activate();
+                    next_btn.activate();
+                    back_btn.activate();
                     status.set_label("");
                 }
                 DrawMessage::Recalc => {
@@ -114,6 +125,7 @@ pub(crate) fn spawn_image_thread(
 
 fn load_image(
     file_choice: &mut menu::Choice,
+    images_path: Arc<RwLock<Vec<PathBuf>>>,
     crop: Option<(f64, f64)>,
     quote: &mut MultilineInput,
     tag: &mut Input,
@@ -128,10 +140,8 @@ fn load_image(
     properties: &Arc<RwLock<ImageProperties>>,
     container: &mut Option<ImageContainer>,
 ) {
-    let file: String = match file_choice.choice() {
-        Some(val) => val,
-        None => return,
-    };
+    let imgs = images_path.read().unwrap();
+    let file = imgs.get(file_choice.value() as usize).unwrap();
 
     *container = Some(ImageContainer::new(&file, Arc::clone(properties)));
 

src/main.rs

@@ -1,3 +1,5 @@
+#![windows_subsystem = "windows"]
+
 mod config;
 mod config_window;
 mod crop_window;

src/main_window.rs

@@ -17,6 +17,7 @@ use fltk::{
     prelude::*,
     window::Window,
 };
+use std::path::PathBuf;
 use std::sync::{mpsc, RwLock};
 use std::{ffi::OsStr, fs, sync::Arc};
 
@@ -41,6 +42,7 @@ pub(crate) struct MainWindow {
     pub(crate) crop_btn: Button,
     pub(crate) status: Frame,
     pub(crate) page: Page,
+    pub(crate) images_path: Arc<RwLock<Vec<PathBuf>>>,
     pub(crate) draw_buff: Arc<RwLock<Vec<u8>>>,
     pub(crate) properties: Arc<RwLock<ImageProperties>>,
     pub(crate) sender: mpsc::Sender<DrawMessage>,
@@ -206,6 +208,7 @@ impl MainWindow {
             reset_tag_position_btn,
             crop_btn,
             status,
+            images_path: Arc::new(RwLock::new(vec![])),
             draw_buff,
             properties: Arc::clone(&properties),
             page: Page {
@@ -226,6 +229,7 @@ impl MainWindow {
         let mut file_choice = self.file_choice.clone();
         let sender = self.sender.clone();
         let mut win = self.win.clone();
+        let imgs = Arc::clone(&self.images_path);
         self.menubar.add(
             "&File/Open Folder...\t",
             Shortcut::Ctrl | 'o',
@@ -249,11 +253,16 @@ impl MainWindow {
                 }
                 let files = fs::read_dir(&path).unwrap();
                 let mut text = String::new();
+                let mut imgs_b = imgs.write().unwrap();
+                *imgs_b = vec![];
                 for file in files {
                     let file = file.unwrap();
                     let path = file.path();
-                    if path.extension() == Some(OsStr::new("jpg")) {
-                        text = format!("{}|{}", text, path.to_str().unwrap());
+                    if path.extension() == Some(OsStr::new("jpg"))
+                        || path.extension() == Some(OsStr::new("png"))
+                    {
+                        text = format!("{}|{}", text, path.file_name().unwrap().to_str().unwrap());
+                        imgs_b.push(path);
                     }
                 }
                 if text.len() == 0 {

src/utils.rs

@@ -1,9 +1,10 @@
 use std::{
     fs,
-    path::Path,
+    path::{Path, PathBuf},
     sync::{Arc, RwLock},
 };
 
+use fltk::dialog;
 use image::{DynamicImage, GenericImageView, ImageBuffer};
 use serde::{Deserialize, Serialize};
 
@@ -55,8 +56,16 @@ pub(crate) struct ImageContainer {
 }
 
 impl ImageContainer {
-    pub(crate) fn new(path: &str, properties: Arc<RwLock<ImageProperties>>) -> Self {
-        let img = image::open(path).unwrap();
+    pub(crate) fn new(path: &PathBuf, properties: Arc<RwLock<ImageProperties>>) -> Self {
+        let img = match image::open(path) {
+            Ok(i) => i,
+            Err(_) => {
+                dialog::message_default("Failed to open image");
+                panic!("Failed to open image");
+            }
+        };
+
+        let img = DynamicImage::ImageRgb8(img.into_rgb8());
         let (width, height): (f64, f64) = Coord::from(img.dimensions()).into();
         let (width, height) = (width, height);
 
@@ -178,20 +187,16 @@ impl ImageContainer {
             prop.tag_position,
             prop.original_dimension.1,
         );
-        image::save_buffer(
-            export,
-            img.as_rgb8().unwrap().as_raw(),
-            crop_width as u32,
-            crop_height as u32,
-            image::ColorType::Rgb8,
-        )
-        .unwrap();
+
+        if let Err(_) = img.save_with_format(&export, image::ImageFormat::Png) {
+            dialog::message_default("Failed to save!");
+        }
     }
 }
 
 #[derive(Serialize, Deserialize, Debug)]
 pub(crate) struct ImageProperties {
-    pub(crate) path: Option<String>,
+    pub(crate) path: Option<PathBuf>,
     pub(crate) dimension: (f64, f64),
     pub(crate) original_dimension: (f64, f64),
     pub(crate) crop_position: Option<(f64, f64)>,