From c6897da62d3666886132937df77ae71a4a0bc7a1 Mon Sep 17 00:00:00 2001
From: Huan Thieu Nguyen <goafanxx@gmail.com>
Date: Sun, 21 May 2023 23:41:22 +0200
Subject: [PATCH] window: Let the user select multiple files to open.
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Uses code that drag and drop already uses. It's kinda ugly because the
file dialog returns a ListModel.

As an added bonus, since the button responds to the action "win.open",
it will also allow open multiple files with the primary menu.
It would be a good idea to change the "Open…" label in the primary menu though.

Closes #191
---
 data/gtk/window.ui |  2 +-
 src/window.rs      | 12 ++++++++++--
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/data/gtk/window.ui b/data/gtk/window.ui
index ab31a43..1488aa6 100644
--- a/data/gtk/window.ui
+++ b/data/gtk/window.ui
@@ -182,7 +182,7 @@
                         <child>
                           <object class="GtkButton">
                             <property name="halign">center</property>
-                            <property name="label" translatable="yes">_Open File…</property>
+                            <property name="label" translatable="yes">_Open Files…</property>
                             <property name="use-underline">True</property>
                             <property name="action-name">win.open</property>
                             <style>
diff --git a/src/window.rs b/src/window.rs
index de92b38..bc5e346 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -485,8 +485,16 @@ impl LpWindow {
             .modal(true)
             .build();
 
-        if let Ok(file) = chooser.open_future(Some(self)).await {
-            self.image_view().set_image_from_file(file);
+        if let Ok(selected) = chooser.open_multiple_future(Some(self)).await {
+            let images: Vec<_> = selected
+                .into_iter()
+                .filter_map(|files| {
+                    files
+                        .ok()
+                        .and_then(|object| object.downcast::<gio::File>().ok())
+                })
+                .collect();
+            self.image_view().set_images_from_files(images);
         } else {
             log::debug!("File dialog canceled or file not readable");
         }