From 162c271eb60f94f0d82dc2e56fda9272ffb5c632 Mon Sep 17 00:00:00 2001
From: pbrw <borowski.pb1@gmail.com>
Date: Thu, 25 Nov 2021 02:56:13 +0100
Subject: ModelGallery: Use TRY() a lot more :^)

---
 Userland/Demos/ModelGallery/CMakeLists.txt    |  2 +-
 Userland/Demos/ModelGallery/GalleryWidget.cpp | 24 +++++++++++++-----------
 Userland/Demos/ModelGallery/GalleryWidget.h   |  2 +-
 Userland/Demos/ModelGallery/main.cpp          | 20 ++++++++------------
 4 files changed, 23 insertions(+), 25 deletions(-)

diff --git a/Userland/Demos/ModelGallery/CMakeLists.txt b/Userland/Demos/ModelGallery/CMakeLists.txt
index cf9f7f9c96..70a7dd10cb 100644
--- a/Userland/Demos/ModelGallery/CMakeLists.txt
+++ b/Userland/Demos/ModelGallery/CMakeLists.txt
@@ -14,4 +14,4 @@ set(SOURCES
 
 serenity_app(ModelGallery ICON app-model-gallery)
 
-target_link_libraries(ModelGallery LibGUI LibGfx)
+target_link_libraries(ModelGallery LibGUI LibGfx LibMain)
diff --git a/Userland/Demos/ModelGallery/GalleryWidget.cpp b/Userland/Demos/ModelGallery/GalleryWidget.cpp
index a24face5bc..a3a971dd6e 100644
--- a/Userland/Demos/ModelGallery/GalleryWidget.cpp
+++ b/Userland/Demos/ModelGallery/GalleryWidget.cpp
@@ -13,23 +13,23 @@ GalleryWidget::GalleryWidget()
     set_layout<GUI::VerticalBoxLayout>();
 
     auto& inner_widget = add<GUI::Widget>();
-    auto& inner_layout = inner_widget.set_layout<GUI::VerticalBoxLayout>();
-    inner_layout.set_margins({ 4 });
+    auto inner_layout = inner_widget.try_set_layout<GUI::VerticalBoxLayout>().release_value_but_fixme_should_propagate_errors();
+    inner_layout->set_margins({ 4 });
 
-    m_tab_widget = inner_widget.add<GUI::TabWidget>();
+    m_tab_widget = inner_widget.try_add<GUI::TabWidget>().release_value_but_fixme_should_propagate_errors();
     m_statusbar = add<GUI::Statusbar>();
 
-    load_basic_model_tab();
+    (void)load_basic_model_tab();
     load_sorting_filtering_tab();
 }
 
-void GalleryWidget::load_basic_model_tab()
+ErrorOr<void> GalleryWidget::load_basic_model_tab()
 {
-    auto& tab = m_tab_widget->add_tab<GUI::Widget>("Basic Model");
-    tab.load_from_gml(basic_model_tab_gml);
+    auto tab = TRY(m_tab_widget->try_add_tab<GUI::Widget>("Basic Model"));
+    tab->load_from_gml(basic_model_tab_gml);
 
     m_basic_model = BasicModel::create();
-    m_basic_model_table = *tab.find_descendant_of_type_named<GUI::TableView>("model_table");
+    m_basic_model_table = *tab->find_descendant_of_type_named<GUI::TableView>("model_table");
     m_basic_model_table->set_model(m_basic_model);
 
     m_basic_model->on_invalidate = [&] {
@@ -43,9 +43,9 @@ void GalleryWidget::load_basic_model_tab()
     m_basic_model->add_item("...hello...");
     m_basic_model->add_item("...friends! :^)");
 
-    m_new_item_name = *tab.find_descendant_of_type_named<GUI::TextBox>("new_item_name");
-    m_add_new_item = *tab.find_descendant_of_type_named<GUI::Button>("add_new_item");
-    m_remove_selected_item = *tab.find_descendant_of_type_named<GUI::Button>("remove_selected_item");
+    m_new_item_name = *tab->find_descendant_of_type_named<GUI::TextBox>("new_item_name");
+    m_add_new_item = *tab->find_descendant_of_type_named<GUI::Button>("add_new_item");
+    m_remove_selected_item = *tab->find_descendant_of_type_named<GUI::Button>("remove_selected_item");
 
     m_add_new_item->set_icon(Gfx::Bitmap::try_load_from_file("/res/icons/16x16/plus.png").release_value_but_fixme_should_propagate_errors());
     m_remove_selected_item->set_icon(Gfx::Bitmap::try_load_from_file("/res/icons/16x16/minus.png").release_value_but_fixme_should_propagate_errors());
@@ -59,6 +59,8 @@ void GalleryWidget::load_basic_model_tab()
             m_basic_model->remove_item(index);
         }
     };
+
+    return {};
 }
 
 void GalleryWidget::load_sorting_filtering_tab()
diff --git a/Userland/Demos/ModelGallery/GalleryWidget.h b/Userland/Demos/ModelGallery/GalleryWidget.h
index ddb7a3c0b6..d1ac6c359f 100644
--- a/Userland/Demos/ModelGallery/GalleryWidget.h
+++ b/Userland/Demos/ModelGallery/GalleryWidget.h
@@ -21,7 +21,7 @@ class GalleryWidget final : public GUI::Widget {
 private:
     GalleryWidget();
 
-    void load_basic_model_tab();
+    ErrorOr<void> load_basic_model_tab();
     void load_sorting_filtering_tab();
 
     void add_textbox_contents_to_basic_model();
diff --git a/Userland/Demos/ModelGallery/main.cpp b/Userland/Demos/ModelGallery/main.cpp
index acdf0c5876..228c89d971 100644
--- a/Userland/Demos/ModelGallery/main.cpp
+++ b/Userland/Demos/ModelGallery/main.cpp
@@ -5,34 +5,30 @@
  */
 
 #include "GalleryWidget.h"
+#include <LibCore/System.h>
 #include <LibGUI/Application.h>
 #include <LibGUI/BoxLayout.h>
 #include <LibGUI/Button.h>
 #include <LibGUI/Frame.h>
 #include <LibGUI/MessageBox.h>
+#include <LibMain/Main.h>
 #include <unistd.h>
 
-int main(int argc, char** argv)
+ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
-    if (pledge("stdio recvfd sendfd rpath wpath cpath unix", nullptr) < 0) {
-        perror("pledge");
-        return 1;
-    }
+    TRY(Core::System::pledge("stdio recvfd sendfd rpath wpath cpath unix", nullptr));
 
-    auto app = GUI::Application::construct(argc, argv);
+    auto app = TRY(GUI::Application::try_create(arguments));
 
-    if (pledge("stdio recvfd sendfd rpath", nullptr) < 0) {
-        perror("pledge");
-        return 1;
-    }
+    TRY(Core::System::pledge("stdio recvfd sendfd rpath", nullptr));
 
     auto app_icon = GUI::Icon::default_icon("app-model-gallery");
 
-    auto window = GUI::Window::construct();
+    auto window = TRY(GUI::Window::try_create());
     window->set_title("Model Gallery");
     window->set_icon(app_icon.bitmap_for_size(16));
     window->resize(430, 480);
-    window->set_main_widget<GalleryWidget>();
+    TRY(window->try_set_main_widget<GalleryWidget>());
 
     window->show();
     return app->exec();
-- 
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