add video_thumbnail additional

The actual code to generate thumbnails is still in C++ but I've added
a helper method to Rust now. It still needs connected.

src/qml/presenter/PreviewSlideListDelegate.qml

@@ -36,10 +36,10 @@ Item {
             implicitHeight: parent.height - Kirigami.Units.smallSpacing * 2
             textSize: model.fontSize
             itemType: model.type
-            imageSource: model.videoBackground != "" ? model.vidThumbnail : model.imageBackground
+            imageSource: model.videoBackground != "" ? model.videoThumbnail : model.imageBackground
             chosenFont: model.font
             text: model.text
-            pdfIndex: slideIndex
+            pdfIndex: model.slideId
 
         }
     }

src/rust/slide_model.rs

@@ -111,19 +111,9 @@ mod slide_model {
         SelectedRole,
         LoopingRole,
         TextRole,
+        VideoThumbnailRole,
     }
 
-    // impl Role {
-    //     pub fn get_role(&self) -> i32 {
-    //         match self {
-    //             Role::ActiveRole => 12,
-    //             Role::SelectedRole => 13,
-    //             Role::LoopingRole => 14,
-    //             Role::TextRole => 1,
-    //         }
-    //     }
-    // }
-
     impl qobject::SlideyMod {
         // #[qinvokable]
         // pub fn add(self: Pin<&mut Self>) {
@@ -177,6 +167,24 @@ mod slide_model {
             QString::default()
         }
 
+        #[qinvokable]
+        pub fn add_video_thumbnail(
+            mut self: Pin<&mut Self>,
+            video: QString,
+            service_item_id: i32,
+            index: i32,
+        ) {
+            let model_index = &self.as_ref().index(index, 0, &QModelIndex::default());
+            let mut vector_roles = QVector_i32::default();
+            vector_roles.append(self.get_role(Role::VideoThumbnailRole));
+            if let Some(slide) = self.as_mut().slides_mut().get_mut(index as usize) {
+                slide.video_thumbnail = video;
+            }
+            self.as_mut()
+                .emit_data_changed(model_index, model_index, &vector_roles);
+            println!("AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH");
+        }
+
         #[qinvokable]
         pub fn clear(mut self: Pin<&mut Self>) {
             unsafe {
@@ -694,6 +702,7 @@ mod slide_model {
                 Role::SelectedRole => 13,
                 Role::LoopingRole => 14,
                 Role::TextRole => 1,
+                Role::VideoThumbnailRole => 15,
                 _ => 0,
             }
         }