FileManager: Add a basic context menu with copy/paste/delete/...

I also added a dummy "Properties..." action just to fill out the menu a
little bit. :^)

Fixes #270.

Applications/FileManager/DirectoryView.cpp

@@ -68,12 +68,21 @@ DirectoryView::DirectoryView(GWidget* parent)
 
     m_item_view->set_model_column(GDirectoryModel::Column::Name);
 
-    m_table_view->model()->on_update = [this] {
-        update_statusbar();
+    m_model->on_path_change = [this] {
+        m_table_view->selection().clear();
+        m_item_view->selection().clear();
         if (on_path_change)
             on_path_change(model().path());
     };
 
+    //  NOTE: We're using the on_update hook on the GSortingProxyModel here instead of
+    //        the GDirectoryModel's hook. This is because GSortingProxyModel has already
+    //        installed an on_update hook on the GDirectoryModel internally.
+    // FIXME: This is an unfortunate design. We should come up with something better.
+    m_table_view->model()->on_update = [this] {
+        update_statusbar();
+    };
+
     m_model->on_thumbnail_progress = [this](int done, int total) {
         if (on_thumbnail_progress)
             on_thumbnail_progress(done, total);
@@ -98,6 +107,15 @@ DirectoryView::DirectoryView(GWidget* parent)
             on_selection_change(*m_item_view);
     };
 
+    m_table_view->on_context_menu_request = [this](auto& index, auto& event) {
+        if (on_context_menu_request)
+            on_context_menu_request(*m_table_view, index, event);
+    };
+    m_item_view->on_context_menu_request = [this](auto& index, auto& event) {
+        if (on_context_menu_request)
+            on_context_menu_request(*m_item_view, index, event);
+    };
+
     set_view_mode(ViewMode::Icon);
 }
 

Applications/FileManager/DirectoryView.h

@@ -25,6 +25,7 @@ public:
 
     Function<void(const StringView&)> on_path_change;
     Function<void(GAbstractView&)> on_selection_change;
+    Function<void(const GAbstractView&, const GModelIndex&, const GContextMenuEvent&)> on_context_menu_request;
     Function<void(const StringView&)> on_status_message;
     Function<void(int done, int total)> on_thumbnail_progress;
 

Applications/FileManager/main.cpp

@@ -178,6 +178,8 @@ int main(int argc, char** argv)
         }
     });
 
+    auto properties_action = GAction::create("Properties...", { Mod_Alt, Key_Return }, [](auto&) {});
+
     auto delete_action = GAction::create("Delete", GraphicsBitmap::load_from_file("/res/icons/16x16/delete.png"), [](const GAction&) {
         dbgprintf("'Delete' action activated!\n");
     });
@@ -271,6 +273,17 @@ int main(int argc, char** argv)
         progressbar->set_visible(true);
     };
 
+    auto context_menu = make<GMenu>();
+    context_menu->add_action(copy_action);
+    context_menu->add_action(paste_action);
+    context_menu->add_action(delete_action);
+    context_menu->add_separator();
+    context_menu->add_action(properties_action);
+
+    directory_view->on_context_menu_request = [&](const GAbstractView&, const GModelIndex&, const GContextMenuEvent& event) {
+        context_menu->popup(event.screen_position());
+    };
+
     // our initial location is defined as, in order of precedence:
     // 1. the first command-line argument (e.g. FileManager /bin)
     // 2. the user's home directory