LibGUI: Convert GWidget to ObjectPtr

Applications/About/main.cpp

@@ -17,7 +17,7 @@ int main(int argc, char** argv)
     window->set_resizable(false);
     window->set_rect(window_rect);
 
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     window->set_main_widget(widget);
     widget->set_fill_with_background_color(true);
     widget->set_layout(make<GBoxLayout>(Orientation::Vertical));

Applications/ChanViewer/main.cpp

@@ -17,7 +17,7 @@ int main(int argc, char** argv)
     window->set_rect(100, 100, 800, 500);
     window->set_icon(load_png("/res/icons/16x16/app-chanviewer.png"));
 
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     window->set_main_widget(widget);
     widget->set_fill_with_background_color(true);
     widget->set_layout(make<GBoxLayout>(Orientation::Vertical));

Applications/DisplayProperties/DisplayProperties.cpp

@@ -75,7 +75,7 @@ void DisplayPropertiesWidget::create_resolution_list()
 
 void DisplayPropertiesWidget::create_root_widget()
 {
-    m_root_widget = new GWidget;
+    m_root_widget = GWidget::construct();
     m_root_widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
     m_root_widget->set_fill_with_background_color(true);
     m_root_widget->layout()->set_margins({ 4, 4, 4, 16 });
@@ -97,7 +97,7 @@ void DisplayPropertiesWidget::create_frame()
     auto background_splitter = GSplitter::construct(Orientation::Vertical, nullptr);
     tab_widget->add_widget("Wallpaper", background_splitter);
 
-    auto* background_content = new GWidget(background_splitter);
+    auto background_content = GWidget::construct(background_splitter);
     background_content->set_layout(make<GBoxLayout>(Orientation::Vertical));
     background_content->layout()->set_margins({ 4, 4, 4, 4 });
 
@@ -120,7 +120,7 @@ void DisplayPropertiesWidget::create_frame()
     auto settings_splitter = GSplitter::construct(Orientation::Vertical, nullptr);
     tab_widget->add_widget("Settings", settings_splitter);
 
-    auto* settings_content = new GWidget(settings_splitter);
+    auto settings_content = GWidget::construct(settings_splitter);
     settings_content->set_layout(make<GBoxLayout>(Orientation::Vertical));
     settings_content->layout()->set_margins({ 4, 4, 4, 4 });
 
@@ -135,7 +135,7 @@ void DisplayPropertiesWidget::create_frame()
     settings_content->layout()->add_spacer();
 
     // Add the apply and cancel buttons
-    auto* bottom_widget = new GWidget(m_root_widget);
+    auto bottom_widget = GWidget::construct(m_root_widget);
     bottom_widget->set_layout(make<GBoxLayout>(Orientation::Horizontal));
     bottom_widget->layout()->add_spacer();
     bottom_widget->set_size_policy(Orientation::Vertical, SizePolicy::Fixed);

Applications/DisplayProperties/DisplayProperties.h

@@ -29,7 +29,8 @@ public:
     void send_settings_to_window_server(int tabIndex);
     void create_frame();
 
-    inline GWidget* get_root_widget() const { return m_root_widget; }
+    const GWidget* root_widget() const { return m_root_widget; }
+    GWidget* root_widget() { return m_root_widget; }
 
 private:
     void create_wallpaper_list();
@@ -39,7 +40,7 @@ private:
 private:
     String m_wallpaper_path;
     RefPtr<CConfigFile> m_wm_config;
-    GWidget* m_root_widget { nullptr };
+    ObjectPtr<GWidget> m_root_widget;
     Vector<Size> m_resolutions;
     Vector<String> m_wallpapers;
     ObjectPtr<GLabel> m_wallpaper_preview;

Applications/DisplayProperties/main.cpp

@@ -14,7 +14,7 @@ int main(int argc, char** argv)
     window->set_title("Display Properties");
     window->resize(400, 448);
     window->set_resizable(false);
-    window->set_main_widget(instance.get_root_widget());
+    window->set_main_widget(instance.root_widget());
     window->set_icon(load_png("/res/icons/16x16/app-display-properties.png"));
 
     window->show();

Applications/FileManager/main.cpp

@@ -44,7 +44,7 @@ int main(int argc, char** argv)
     window->set_title("File Manager");
     window->set_rect(20, 200, 640, 480);
 
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
     widget->layout()->set_spacing(0);
 

Applications/IRCClient/IRCAppWindow.cpp

@@ -153,7 +153,7 @@ void IRCAppWindow::setup_menus()
 
 void IRCAppWindow::setup_widgets()
 {
-    auto* widget = new GWidget(nullptr);
+    auto widget = GWidget::construct();
     set_main_widget(widget);
     widget->set_fill_with_background_color(true);
     widget->set_background_color(Color::WarmGray);
@@ -171,7 +171,7 @@ void IRCAppWindow::setup_widgets()
     toolbar->add_action(*m_open_query_action);
     toolbar->add_action(*m_close_query_action);
 
-    auto* outer_container = new GWidget(widget);
+    auto outer_container = GWidget::construct(widget);
     outer_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
     outer_container->layout()->set_margins({ 2, 0, 2, 2 });
 

Applications/Launcher/main.cpp

@@ -75,7 +75,7 @@ GWindow* make_launcher_window()
     window->set_show_titlebar(false);
     window->set_window_type(GWindowType::Launcher);
 
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     widget->set_fill_with_background_color(true);
     widget->set_layout(make<GBoxLayout>(vertical ? Orientation::Vertical : Orientation::Horizontal));
     widget->layout()->set_spacing(0);

Applications/PaintBrush/ColorDialog.cpp

@@ -19,16 +19,16 @@ ColorDialog::~ColorDialog()
 
 void ColorDialog::build()
 {
-    auto* horizontal_container = new GWidget;
+    auto horizontal_container = GWidget::construct();
     horizontal_container->set_fill_with_background_color(true);
     horizontal_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
     horizontal_container->layout()->set_margins({ 4, 4, 4, 4 });
     set_main_widget(horizontal_container);
 
-    auto* left_vertical_container = new GWidget(horizontal_container);
+    auto left_vertical_container = GWidget::construct(horizontal_container);
     left_vertical_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
 
-    auto* right_vertical_container = new GWidget(horizontal_container);
+    auto right_vertical_container = GWidget::construct(horizontal_container);
     right_vertical_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
 
     enum RGBComponent {

Applications/PaintBrush/PaletteWidget.cpp

@@ -81,16 +81,16 @@ PaletteWidget::PaletteWidget(PaintableWidget& paintable_widget, GWidget* parent)
         set_secondary_color(color);
     };
 
-    auto* color_container = new GWidget(this);
+    auto color_container = GWidget::construct(this);
     color_container->set_relative_rect(m_secondary_color_widget->relative_rect().right() + 2, 2, 500, 32);
     color_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
     color_container->layout()->set_spacing(1);
 
-    auto* top_color_container = new GWidget(color_container);
+    auto top_color_container = GWidget::construct(color_container);
     top_color_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
     top_color_container->layout()->set_spacing(1);
 
-    auto* bottom_color_container = new GWidget(color_container);
+    auto bottom_color_container = GWidget::construct(color_container);
     bottom_color_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
     bottom_color_container->layout()->set_spacing(1);
 

Applications/PaintBrush/main.cpp

@@ -19,14 +19,14 @@ int main(int argc, char** argv)
     window->set_title("PaintBrush");
     window->set_rect(100, 100, 640, 480);
 
-    auto* horizontal_container = new GWidget(nullptr);
+    auto horizontal_container = GWidget::construct(nullptr);
     window->set_main_widget(horizontal_container);
     horizontal_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
     horizontal_container->layout()->set_spacing(0);
 
     new ToolboxWidget(horizontal_container);
 
-    auto* vertical_container = new GWidget(horizontal_container);
+    auto vertical_container = GWidget::construct(horizontal_container);
     vertical_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
     vertical_container->layout()->set_spacing(0);
 

Applications/SoundPlayer/main.cpp

@@ -34,7 +34,7 @@ int main(int argc, char** argv)
     window->set_title("SoundPlayer");
     window->set_rect(300, 300, 300, 200);
 
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     window->set_main_widget(widget);
 
     widget->set_fill_with_background_color(true);

Applications/SystemMonitor/MemoryStatsWidget.cpp

@@ -23,7 +23,7 @@ MemoryStatsWidget::MemoryStatsWidget(GraphWidget& graph, GWidget* parent)
     layout()->set_spacing(3);
 
     auto build_widgets_for_label = [this](const String& description) -> ObjectPtr<GLabel> {
-        auto* container = new GWidget(this);
+        auto container = GWidget::construct(this);
         container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
         container->set_size_policy(SizePolicy::Fixed, SizePolicy::Fixed);
         container->set_preferred_size(275, 12);

Applications/SystemMonitor/main.cpp

@@ -47,7 +47,7 @@ int main(int argc, char** argv)
 {
     GApplication app(argc, argv);
 
-    auto* keeper = new GWidget;
+    auto keeper = GWidget::construct();
     keeper->set_layout(make<GBoxLayout>(Orientation::Vertical));
     keeper->set_fill_with_background_color(true);
     keeper->set_background_color(Color::WarmGray);
@@ -58,9 +58,9 @@ int main(int argc, char** argv)
     auto process_container_splitter = GSplitter::construct(Orientation::Vertical, nullptr);
     tabwidget->add_widget("Processes", process_container_splitter);
 
-    auto* process_table_container = new GWidget(process_container_splitter);
+    auto process_table_container = GWidget::construct(process_container_splitter);
 
-    auto* graphs_container = new GWidget;
+    auto graphs_container = GWidget::construct();
     graphs_container->set_fill_with_background_color(true);
     graphs_container->set_background_color(Color::WarmGray);
     graphs_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
@@ -236,7 +236,7 @@ public:
 
 GWidget* build_file_systems_tab()
 {
-    auto* fs_widget = new GWidget(nullptr);
+    auto fs_widget = GWidget::construct();
     fs_widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
     fs_widget->layout()->set_margins({ 4, 4, 4, 4 });
     auto fs_table_view = GTableView::construct(fs_widget);
@@ -301,7 +301,7 @@ GWidget* build_file_systems_tab()
 
 GWidget* build_pci_devices_tab()
 {
-    auto* pci_widget = new GWidget(nullptr);
+    auto pci_widget = GWidget::construct(nullptr);
     pci_widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
     pci_widget->layout()->set_margins({ 4, 4, 4, 4 });
     auto pci_table_view = GTableView::construct(pci_widget);
@@ -355,7 +355,7 @@ GWidget* build_pci_devices_tab()
 
 GWidget* build_devices_tab()
 {
-    auto* devices_widget = new GWidget(nullptr);
+    auto devices_widget = GWidget::construct();
     devices_widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
     devices_widget->layout()->set_margins({ 4, 4, 4, 4 });
 

Applications/Terminal/main.cpp

@@ -94,7 +94,7 @@ GWindow* create_settings_window(TerminalWidget& terminal, RefPtr<CConfigFile> co
     window->set_title("Terminal Settings");
     window->set_rect(50, 50, 200, 140);
 
-    auto* settings = new GWidget;
+    auto settings = GWidget::construct();
     window->set_main_widget(settings);
     settings->set_fill_with_background_color(true);
     settings->set_layout(make<GBoxLayout>(Orientation::Vertical));

Applications/TextEditor/TextEditorWidget.cpp

@@ -34,7 +34,7 @@ TextEditorWidget::TextEditorWidget()
             update_title();
     };
 
-    m_find_widget = new GWidget(this);
+    m_find_widget = GWidget::construct(this);
     m_find_widget->set_fill_with_background_color(true);
     m_find_widget->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     m_find_widget->set_preferred_size(0, 22);

Applications/TextEditor/TextEditorWidget.h

@@ -41,7 +41,7 @@ private:
     ObjectPtr<GTextBox> m_find_textbox;
     GButton* m_find_previous_button { nullptr };
     GButton* m_find_next_button { nullptr };
-    GWidget* m_find_widget { nullptr };
+    ObjectPtr<GWidget> m_find_widget;
 
     bool m_document_dirty { false };
 };

Applications/Welcome/main.cpp

@@ -94,13 +94,13 @@ int main(int argc, char** argv)
     // main section
     //
 
-    auto* main_section = new GWidget(background);
+    auto main_section = GWidget::construct(background);
     main_section->set_layout(make<GBoxLayout>(Orientation::Horizontal));
     main_section->layout()->set_margins({ 0, 0, 0, 0 });
     main_section->layout()->set_spacing(8);
     main_section->set_size_policy(SizePolicy::Fill, SizePolicy::Fill);
 
-    auto* menu = new GWidget(main_section);
+    auto menu = GWidget::construct(main_section);
     menu->set_layout(make<GBoxLayout>(Orientation::Vertical));
     menu->layout()->set_margins({ 0, 0, 0, 0 });
     menu->layout()->set_spacing(8);
@@ -111,7 +111,7 @@ int main(int argc, char** argv)
     stack->set_size_policy(SizePolicy::Fill, SizePolicy::Fill);
 
     for (auto& page : pages) {
-        auto* content = new GWidget(stack);
+        auto content = GWidget::construct(stack);
         content->set_layout(make<GBoxLayout>(Orientation::Vertical));
         content->layout()->set_margins({ 0, 0, 0, 0 });
         content->layout()->set_spacing(8);
@@ -139,7 +139,7 @@ int main(int argc, char** argv)
         menu_option->set_text_alignment(TextAlignment::CenterLeft);
         menu_option->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
         menu_option->set_preferred_size(0, 20);
-        menu_option->on_click = [stack, content](GButton&) {
+        menu_option->on_click = [&](auto&) {
             stack->set_active_widget(content);
             content->invalidate_layout();
         };

Demos/HelloWorld/main.cpp

@@ -13,7 +13,7 @@ int main(int argc, char** argv)
     window->set_rect(100, 100, 240, 160);
     window->set_title("Hello World!");
 
-    auto* main_widget = new GWidget;
+    auto main_widget = GWidget::construct();
     window->set_main_widget(main_widget);
     main_widget->set_fill_with_background_color(true);
     main_widget->set_background_color(Color::White);

Demos/WidgetGallery/main.cpp

@@ -22,7 +22,7 @@ int main(int argc, char** argv)
     window->set_rect(100, 100, 320, 620);
     window->set_title("Widget Gallery");
 
-    auto* main_widget = new GWidget;
+    auto main_widget = GWidget::construct();
     window->set_main_widget(main_widget);
     main_widget->set_fill_with_background_color(true);
     main_widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
@@ -66,7 +66,7 @@ int main(int argc, char** argv)
     auto spinbox2 = GSpinBox::construct(main_widget);
     spinbox2->set_enabled(false);
 
-    auto* vertical_slider_container = new GWidget(main_widget);
+    auto vertical_slider_container = GWidget::construct(main_widget);
     vertical_slider_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     vertical_slider_container->set_preferred_size(0, 100);
     vertical_slider_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));

DevTools/Inspector/main.cpp

@@ -32,7 +32,7 @@ int main(int argc, char** argv)
     window->set_title("Inspector");
     window->set_rect(150, 150, 300, 500);
 
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     window->set_main_widget(widget);
     widget->set_fill_with_background_color(true);
     widget->set_layout(make<GBoxLayout>(Orientation::Vertical));

DevTools/VisualBuilder/VBPropertiesWindow.cpp

@@ -55,7 +55,7 @@ VBPropertiesWindow::VBPropertiesWindow()
     set_title("Properties");
     set_rect(780, 200, 240, 280);
 
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     widget->set_fill_with_background_color(true);
     widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
     widget->layout()->set_margins({ 2, 2, 2, 2 });

DevTools/VisualBuilder/VBWidget.cpp

@@ -30,7 +30,7 @@ VBWidget::~VBWidget()
 {
     m_form.m_gwidget_map.remove(m_gwidget);
     m_form.m_selected_widgets.remove(this);
-    delete m_gwidget;
+    m_gwidget->parent()->remove_child(*m_gwidget);
 }
 
 Rect VBWidget::rect() const

DevTools/VisualBuilder/VBWidget.h

@@ -8,10 +8,10 @@
 #include <AK/RefCounted.h>
 #include <AK/Weakable.h>
 #include <LibDraw/Rect.h>
+#include <LibGUI/GWidget.h>
 
 class GPainter;
 class GVariant;
-class GWidget;
 class VBForm;
 class VBProperty;
 class VBWidgetPropertyModel;
@@ -81,7 +81,7 @@ private:
 
     VBWidgetType m_type { VBWidgetType::None };
     VBForm& m_form;
-    GWidget* m_gwidget { nullptr };
+    ObjectPtr<GWidget> m_gwidget;
     NonnullOwnPtrVector<VBProperty> m_properties;
     NonnullRefPtr<VBWidgetPropertyModel> m_property_model;
     Rect m_transform_origin_rect;

DevTools/VisualBuilder/VBWidgetRegistry.cpp

@@ -68,11 +68,11 @@ VBWidgetType widget_type_from_class_name(const StringView& name)
     ASSERT_NOT_REACHED();
 }
 
-static GWidget* build_gwidget(VBWidgetType type, GWidget* parent)
+static ObjectPtr<GWidget> build_gwidget(VBWidgetType type, GWidget* parent)
 {
     switch (type) {
     case VBWidgetType::GWidget:
-        return new GWidget(parent);
+        return GWidget::construct(parent);
     case VBWidgetType::GScrollBar:
         return GScrollBar::construct(Orientation::Vertical, parent);
     case VBWidgetType::GGroupBox:
@@ -113,21 +113,21 @@ static GWidget* build_gwidget(VBWidgetType type, GWidget* parent)
         return slider;
     }
     case VBWidgetType::GCheckBox: {
-        auto* box = new GCheckBox(parent);
+        auto box = GCheckBox::construct(parent);
         box->set_text("checkbox_1");
         return box;
     }
     case VBWidgetType::GRadioButton:
-        return new GRadioButton("radio_1", parent);
+        return GRadioButton::construct("radio_1", parent);
     default:
         ASSERT_NOT_REACHED();
         return nullptr;
     }
 }
 
-GWidget* VBWidgetRegistry::build_gwidget(VBWidget& widget, VBWidgetType type, GWidget* parent, NonnullOwnPtrVector<VBProperty>& properties)
+ObjectPtr<GWidget> VBWidgetRegistry::build_gwidget(VBWidget& widget, VBWidgetType type, GWidget* parent, NonnullOwnPtrVector<VBProperty>& properties)
 {
-    auto* gwidget = ::build_gwidget(type, parent);
+    auto gwidget = ::build_gwidget(type, parent);
     auto add_readonly_property = [&](const String& name, const GVariant& value) {
         auto property = make<VBProperty>(widget, name, value);
         property->set_readonly(true);

DevTools/VisualBuilder/VBWidgetRegistry.h

@@ -1,12 +1,12 @@
 #pragma once
 
 #include "VBWidgetType.h"
-#include <AK/String.h>
 #include <AK/HashMap.h>
 #include <AK/NonnullOwnPtrVector.h>
 #include <AK/OwnPtr.h>
+#include <AK/String.h>
+#include <LibGUI/GWidget.h>
 
-class GWidget;
 class VBProperty;
 class VBWidget;
 
@@ -19,7 +19,7 @@ public:
             callback((VBWidgetType)i);
     }
 
-    static GWidget* build_gwidget(VBWidget&, VBWidgetType, GWidget* parent, NonnullOwnPtrVector<VBProperty>&);
+    static ObjectPtr<GWidget> build_gwidget(VBWidget&, VBWidgetType, GWidget* parent, NonnullOwnPtrVector<VBProperty>&);
 };
 
 String to_class_name(VBWidgetType);

DevTools/VisualBuilder/main.cpp

@@ -80,7 +80,7 @@ GWindow* make_toolbox_window()
     window->set_title("Widgets");
     window->set_rect(20, 200, 80, 300);
 
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     widget->set_fill_with_background_color(true);
     widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
     widget->layout()->set_spacing(0);

Games/Minesweeper/main.cpp

@@ -19,12 +19,12 @@ int main(int argc, char** argv)
     window->set_title("Minesweeper");
     window->set_rect(100, 100, 139, 175);
 
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     window->set_main_widget(widget);
     widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
     widget->layout()->set_spacing(0);
 
-    auto* container = new GWidget(widget);
+    auto container = GWidget::construct(widget);
     container->set_fill_with_background_color(true);
     container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     container->set_preferred_size(0, 36);

Libraries/LibGUI/GAboutDialog.cpp

@@ -13,12 +13,12 @@ GAboutDialog::GAboutDialog(const StringView& name, const GraphicsBitmap* icon, C
     set_title(String::format("About %s", m_name.characters()));
     set_resizable(false);
 
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     set_main_widget(widget);
     widget->set_fill_with_background_color(true);
     widget->set_layout(make<GBoxLayout>(Orientation::Horizontal));
 
-    auto* left_container = new GWidget(widget);
+    auto left_container = GWidget::construct(widget);
     left_container->set_size_policy(SizePolicy::Fixed, SizePolicy::Fill);
     left_container->set_preferred_size(48, 0);
     left_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
@@ -28,7 +28,7 @@ GAboutDialog::GAboutDialog(const StringView& name, const GraphicsBitmap* icon, C
     icon_label->set_preferred_size(40, 40);
     left_container->layout()->add_spacer();
 
-    auto* right_container = new GWidget(widget);
+    auto right_container = GWidget::construct(widget);
     right_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
     right_container->layout()->set_margins({ 0, 4, 4, 4 });
 
@@ -46,7 +46,7 @@ GAboutDialog::GAboutDialog(const StringView& name, const GraphicsBitmap* icon, C
 
     right_container->layout()->add_spacer();
 
-    auto* button_container = new GWidget(right_container);
+    auto button_container = GWidget::construct(right_container);
     button_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     button_container->set_preferred_size(0, 20);
     button_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));

Libraries/LibGUI/GAbstractView.cpp

@@ -14,7 +14,6 @@ GAbstractView::GAbstractView(GWidget* parent)
 
 GAbstractView::~GAbstractView()
 {
-    delete m_edit_widget;
 }
 
 void GAbstractView::set_model(RefPtr<GModel>&& model)
@@ -63,8 +62,10 @@ void GAbstractView::begin_editing(const GModelIndex& index)
         return;
     if (!model()->is_editable(index))
         return;
-    if (m_edit_widget)
-        delete m_edit_widget;
+    if (m_edit_widget) {
+        remove_child(*m_edit_widget);
+        m_edit_widget = nullptr;
+    }
     m_edit_index = index;
 
     ASSERT(aid_create_editing_delegate);
@@ -88,8 +89,10 @@ void GAbstractView::begin_editing(const GModelIndex& index)
 void GAbstractView::stop_editing()
 {
     m_edit_index = {};
-    delete m_edit_widget;
-    m_edit_widget = nullptr;
+    if (m_edit_widget) {
+        remove_child(*m_edit_widget);
+        m_edit_widget = nullptr;
+    }
 }
 
 void GAbstractView::activate(const GModelIndex& index)

Libraries/LibGUI/GAbstractView.h

@@ -52,7 +52,7 @@ protected:
 
     bool m_editable { false };
     GModelIndex m_edit_index;
-    GWidget* m_edit_widget { nullptr };
+    ObjectPtr<GWidget> m_edit_widget;
     Rect m_edit_widget_content_rect;
 
 private:

Libraries/LibGUI/GFilePicker.cpp

@@ -50,18 +50,18 @@ GFilePicker::GFilePicker(Mode mode, const StringView& file_name, const StringVie
 {
     set_title(m_mode == Mode::Open ? "Open File" : "Save File");
     set_rect(200, 200, 700, 400);
-    auto* horizontal_container = new GWidget;
+    auto horizontal_container = GWidget::construct();
     set_main_widget(horizontal_container);
     horizontal_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
     horizontal_container->layout()->set_margins({ 4, 4, 4, 4 });
     horizontal_container->set_fill_with_background_color(true);
     horizontal_container->set_background_color(Color::WarmGray);
 
-    auto* vertical_container = new GWidget(horizontal_container);
+    auto vertical_container = GWidget::construct(horizontal_container);
     vertical_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
     vertical_container->layout()->set_spacing(4);
 
-    auto* upper_container = new GWidget(vertical_container);
+    auto upper_container = GWidget::construct(vertical_container);
     upper_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
     upper_container->layout()->set_spacing(4);
     upper_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
@@ -118,13 +118,13 @@ GFilePicker::GFilePicker(Mode mode, const StringView& file_name, const StringVie
     });
     toolbar->add_action(*mkdir_action);
 
-    auto* lower_container = new GWidget(vertical_container);
+    auto lower_container = GWidget::construct(vertical_container);
     lower_container->set_layout(make<GBoxLayout>(Orientation::Vertical));
     lower_container->layout()->set_spacing(4);
     lower_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     lower_container->set_preferred_size(0, 60);
 
-    auto* filename_container = new GWidget(lower_container);
+    auto filename_container = GWidget::construct(lower_container);
     filename_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     filename_container->set_preferred_size(0, 20);
     filename_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
@@ -155,7 +155,7 @@ GFilePicker::GFilePicker(Mode mode, const StringView& file_name, const StringVie
         set_preview(path);
     };
 
-    auto* button_container = new GWidget(lower_container);
+    auto button_container = GWidget::construct(lower_container);
     button_container->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     button_container->set_preferred_size(0, 20);
     button_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));

Libraries/LibGUI/GInputBox.cpp

@@ -19,7 +19,7 @@ GInputBox::~GInputBox()
 
 void GInputBox::build()
 {
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     set_main_widget(widget);
 
     int text_width = widget->font().width(m_prompt);
@@ -42,12 +42,12 @@ void GInputBox::build()
     m_text_editor->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     m_text_editor->set_preferred_size(0, 19);
 
-    auto* button_container_outer = new GWidget(widget);
+    auto button_container_outer = GWidget::construct(widget);
     button_container_outer->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     button_container_outer->set_preferred_size(0, 20);
     button_container_outer->set_layout(make<GBoxLayout>(Orientation::Vertical));
 
-    auto* button_container_inner = new GWidget(button_container_outer);
+    auto button_container_inner = GWidget::construct(button_container_outer);
     button_container_inner->set_layout(make<GBoxLayout>(Orientation::Horizontal));
     button_container_inner->layout()->set_spacing(8);
 

Libraries/LibGUI/GMessageBox.cpp

@@ -50,7 +50,7 @@ bool GMessageBox::should_include_cancel_button() const
 
 void GMessageBox::build()
 {
-    auto* widget = new GWidget;
+    auto widget = GWidget::construct();
     set_main_widget(widget);
 
     int text_width = widget->font().width(m_text);
@@ -62,9 +62,9 @@ void GMessageBox::build()
     widget->layout()->set_margins({ 0, 15, 0, 15 });
     widget->layout()->set_spacing(15);
 
-    GWidget* message_container = widget;
+    ObjectPtr<GWidget> message_container = widget;
     if (m_type != Type::None) {
-        message_container = new GWidget(widget);
+        message_container = GWidget::construct(widget);
         message_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
         message_container->layout()->set_margins({ 8, 0, 8, 0 });
         message_container->layout()->set_spacing(8);
@@ -80,7 +80,7 @@ void GMessageBox::build()
     label->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     label->set_preferred_size(text_width, 16);
 
-    auto* button_container = new GWidget(widget);
+    auto button_container = GWidget::construct(widget);
     button_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
     button_container->layout()->set_spacing(5);
     button_container->layout()->set_margins({ 15, 0, 15, 0 });

Libraries/LibGUI/GScrollableWidget.cpp

@@ -19,7 +19,7 @@ GScrollableWidget::GScrollableWidget(GWidget* parent)
         update();
     };
 
-    m_corner_widget = new GWidget(this);
+    m_corner_widget = GWidget::construct(this);
     m_corner_widget->set_fill_with_background_color(true);
 }
 

Libraries/LibGUI/GScrollableWidget.h

@@ -55,7 +55,7 @@ private:
 
     ObjectPtr<GScrollBar> m_vertical_scrollbar;
     ObjectPtr<GScrollBar> m_horizontal_scrollbar;
-    GWidget* m_corner_widget { nullptr };
+    ObjectPtr<GWidget> m_corner_widget;
     Size m_content_size;
     Size m_size_occupied_by_fixed_elements;
     bool m_scrollbars_enabled { true };

Libraries/LibGUI/GStackWidget.h

@@ -8,7 +8,8 @@ public:
     explicit GStackWidget(GWidget* parent);
     virtual ~GStackWidget() override;
 
-    GWidget* active_widget() const { return m_active_widget; }
+    GWidget* active_widget() { return m_active_widget.ptr(); }
+    const GWidget* active_widget() const { return m_active_widget.ptr(); }
     void set_active_widget(GWidget*);
 
     Function<void(GWidget*)> on_active_widget_change;
@@ -18,5 +19,5 @@ protected:
     virtual void resize_event(GResizeEvent&) override;
 
 private:
-    GWidget* m_active_widget { nullptr };
+    ObjectPtr<GWidget> m_active_widget;
 };

Libraries/LibGUI/GTabWidget.h

@@ -18,7 +18,8 @@ public:
 
     int active_tab_index() const;
 
-    GWidget* active_widget() const { return m_active_widget; }
+    GWidget* active_widget() { return m_active_widget.ptr(); }
+    const GWidget* active_widget() const { return m_active_widget.ptr(); }
     void set_active_widget(GWidget*);
 
     int bar_height() const { return 21; }
@@ -41,7 +42,7 @@ private:
     Rect container_rect() const;
     void update_bar();
 
-    GWidget* m_active_widget { nullptr };
+    ObjectPtr<GWidget> m_active_widget;
 
     struct TabData {
         Rect rect(const Font&) const;

Libraries/LibGUI/GWidget.h

@@ -45,10 +45,10 @@ enum class VerticalDirection {
 class GWidget : public CObject {
     C_OBJECT(GWidget)
 public:
-    explicit GWidget(GWidget* parent = nullptr);
     virtual ~GWidget() override;
 
     GLayout* layout() { return m_layout.ptr(); }
+    const GLayout* layout() const { return m_layout.ptr(); }
     void set_layout(OwnPtr<GLayout>&&);
 
     SizePolicy horizontal_size_policy() const { return m_horizontal_size_policy; }
@@ -72,25 +72,6 @@ public:
     void set_updates_enabled(bool);
 
     virtual void event(CEvent&) override;
-    virtual void paint_event(GPaintEvent&);
-    virtual void resize_event(GResizeEvent&);
-    virtual void show_event(GShowEvent&);
-    virtual void hide_event(GHideEvent&);
-    virtual void keydown_event(GKeyEvent&);
-    virtual void keyup_event(GKeyEvent&);
-    virtual void mousemove_event(GMouseEvent&);
-    virtual void mousedown_event(GMouseEvent&);
-    virtual void mouseup_event(GMouseEvent&);
-    virtual void mousewheel_event(GMouseEvent&);
-    virtual void click_event(GMouseEvent&);
-    virtual void doubleclick_event(GMouseEvent&);
-    virtual void context_menu_event(GContextMenuEvent&);
-    virtual void focusin_event(CEvent&);
-    virtual void focusout_event(CEvent&);
-    virtual void enter_event(CEvent&);
-    virtual void leave_event(CEvent&);
-    virtual void child_event(CChildEvent&) override;
-    virtual void change_event(GEvent&);
 
     // This is called after children have been painted.
     virtual void second_paint_event(GPaintEvent&);
@@ -221,8 +202,29 @@ public:
     virtual void save_to(AK::JsonObject&) override;
 
 protected:
+    explicit GWidget(GWidget* parent = nullptr);
+
     virtual void custom_layout() {}
     virtual void did_change_font() {}
+    virtual void paint_event(GPaintEvent&);
+    virtual void resize_event(GResizeEvent&);
+    virtual void show_event(GShowEvent&);
+    virtual void hide_event(GHideEvent&);
+    virtual void keydown_event(GKeyEvent&);
+    virtual void keyup_event(GKeyEvent&);
+    virtual void mousemove_event(GMouseEvent&);
+    virtual void mousedown_event(GMouseEvent&);
+    virtual void mouseup_event(GMouseEvent&);
+    virtual void mousewheel_event(GMouseEvent&);
+    virtual void click_event(GMouseEvent&);
+    virtual void doubleclick_event(GMouseEvent&);
+    virtual void context_menu_event(GContextMenuEvent&);
+    virtual void focusin_event(CEvent&);
+    virtual void focusout_event(CEvent&);
+    virtual void enter_event(CEvent&);
+    virtual void leave_event(CEvent&);
+    virtual void child_event(CChildEvent&) override;
+    virtual void change_event(GEvent&);
 
 private:
     void handle_paint_event(GPaintEvent&);

Libraries/LibGUI/GWindow.cpp

@@ -698,7 +698,7 @@ Vector<GWidget*> GWindow::focusable_widgets() const
         });
     };
 
-    collect_focusable_widgets(*m_main_widget);
+    collect_focusable_widgets(const_cast<GWidget&>(*m_main_widget));
     return collected_widgets;
 }
 

Libraries/LibGUI/GWindow.h

@@ -154,7 +154,7 @@ private:
     RefPtr<GraphicsBitmap> m_icon;
     int m_window_id { 0 };
     float m_opacity_when_windowless { 1.0f };
-    GWidget* m_main_widget { nullptr };
+    ObjectPtr<GWidget> m_main_widget;
     WeakPtr<GWidget> m_focused_widget;
     WeakPtr<GWidget> m_global_cursor_tracking_widget;
     WeakPtr<GWidget> m_automatic_cursor_tracking_widget;