From a1ece089ac2788297b7a39b90c48219b685c2a6b Mon Sep 17 00:00:00 2001
From: hacknus <linus.stoeckli@unibe.ch>
Date: Thu, 5 Dec 2024 14:03:24 +0100
Subject: [PATCH] implement `forget_all_stored_images` in `MyApp::update()`

---
 examples/select_file_with_information_view.rs | 9 ++++++++-
 src/information_panel.rs                      | 4 ++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/examples/select_file_with_information_view.rs b/examples/select_file_with_information_view.rs
index f83fbeff..206e553a 100644
--- a/examples/select_file_with_information_view.rs
+++ b/examples/select_file_with_information_view.rs
@@ -2,7 +2,7 @@ use std::path::PathBuf;
 
 use eframe::egui;
 use egui_file_dialog::information_panel::InformationPanel;
-use egui_file_dialog::FileDialog;
+use egui_file_dialog::{DialogState, FileDialog};
 
 struct MyApp {
     file_dialog: FileDialog,
@@ -54,6 +54,13 @@ impl eframe::App for MyApp {
                 self.selected_file = Some(path.to_path_buf());
             }
 
+            match self.file_dialog.state() {
+                DialogState::Closed | DialogState::Cancelled => {
+                    self.information_panel.forget_all_stored_images(ui);
+                }
+                _ => {}
+            }
+
             ui.label(format!("Selected file: {:?}", self.selected_file));
         });
     }
diff --git a/src/information_panel.rs b/src/information_panel.rs
index 0131d7a3..98abd7aa 100644
--- a/src/information_panel.rs
+++ b/src/information_panel.rs
@@ -350,8 +350,8 @@ impl InformationPanel {
         self.stored_images.shift_remove_index(0);
     }
 
-    #[allow(dead_code)]
-    fn forget_all_stored_images(&mut self, ui: &Ui) {
+    /// removes all loaded preview images from the egui-loaders to reduce memory usage.
+    pub fn forget_all_stored_images(&mut self, ui: &Ui) {
         for image in &self.stored_images {
             ui.ctx().forget_image(format!("file://{image}").as_str());
         }