LibGUI: Add a GToolBar class that can be populated with GActions.

The same action can be added to both a menu and a toolbar.
Use this to put a toolbar into FileManager. This is pretty neat. :^)

Applications/FileManager/main.cpp

@@ -3,47 +3,52 @@
 #include <LibGUI/GBoxLayout.h>
 #include <LibGUI/GApplication.h>
 #include <LibGUI/GStatusBar.h>
+#include <LibGUI/GToolBar.h>
 #include <LibGUI/GMenuBar.h>
 #include <LibGUI/GAction.h>
 #include <unistd.h>
 #include <stdio.h>
 #include "DirectoryView.h"
 
-static GWindow* make_window();
-
 int main(int argc, char** argv)
 {
     GApplication app(argc, argv);
 
+    auto mkdir_action = GAction::create("New directory...", GraphicsBitmap::load_from_file(GraphicsBitmap::Format::RGBA32, "/res/icons/mkdir16.rgb", { 16, 16 }), [] (const GAction&) {
+        dbgprintf("'New directory' action activated!\n");
+    });
+
+    auto copy_action = GAction::create("Copy", GraphicsBitmap::load_from_file(GraphicsBitmap::Format::RGBA32, "/res/icons/copyfile16.rgb", { 16, 16 }), [] (const GAction&) {
+        dbgprintf("'Copy' action activated!\n");
+    });
+
+    auto delete_action = GAction::create("Delete", GraphicsBitmap::load_from_file(GraphicsBitmap::Format::RGBA32, "/res/icons/trash16.rgb", { 16, 16 }), [] (const GAction&) {
+        dbgprintf("'Delete' action activated!\n");
+    });
+
     auto menubar = make<GMenuBar>();
 
     auto app_menu = make<GMenu>("FileManager");
-    app_menu->add_action(make<GAction>("Quit", String(), [] (const GAction&) {
+    app_menu->add_action(GAction::create("Quit", String(), [] (const GAction&) {
         GApplication::the().quit(0);
         return;
     }));
     menubar->add_menu(move(app_menu));
 
     auto file_menu = make<GMenu>("File");
+    file_menu->add_action(mkdir_action.copy_ref());
+    file_menu->add_action(copy_action.copy_ref());
+    file_menu->add_action(delete_action.copy_ref());
     menubar->add_menu(move(file_menu));
 
     auto help_menu = make<GMenu>("Help");
-    help_menu->add_action(make<GAction>("About", [] (const GAction&) {
+    help_menu->add_action(GAction::create("About", [] (const GAction&) {
         dbgprintf("FIXME: Implement Help/About\n");
     }));
     menubar->add_menu(move(help_menu));
 
     app.set_menubar(move(menubar));
 
-    auto* window = make_window();
-    window->set_should_exit_app_on_close(true);
-    window->show();
-
-    return app.exec();
-}
-
-GWindow* make_window()
-{
     auto* window = new GWindow;
     window->set_title("FileManager");
     window->set_rect(20, 200, 240, 300);
@@ -53,6 +58,11 @@ GWindow* make_window()
 
     widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
 
+    auto* toolbar = new GToolBar(widget);
+    toolbar->add_action(mkdir_action.copy_ref());
+    toolbar->add_action(copy_action.copy_ref());
+    toolbar->add_action(delete_action.copy_ref());
+
     auto* directory_view = new DirectoryView(widget);
 
     auto* statusbar = new GStatusBar(widget);
@@ -68,6 +78,8 @@ GWindow* make_window()
 
     directory_view->open("/");
 
-    return window;
-}
+    window->set_should_exit_app_on_close(true);
+    window->show();
 
+    return app.exec();
+}

Applications/Terminal/main.cpp

@@ -97,7 +97,7 @@ int main(int argc, char** argv)
     auto menubar = make<GMenuBar>();
 
     auto app_menu = make<GMenu>("Terminal");
-    app_menu->add_action(make<GAction>("Quit", String(), [] (const GAction&) {
+    app_menu->add_action(GAction::create("Quit", String(), [] (const GAction&) {
         dbgprintf("Terminal: Quit menu activated!\n");
         GApplication::the().quit(0);
         return;
@@ -106,7 +106,7 @@ int main(int argc, char** argv)
 
     auto font_menu = make<GMenu>("Font");
     GFontDatabase::the().for_each_font([&] (const String& font_name) {
-        font_menu->add_action(make<GAction>(font_name, [&terminal] (const GAction& action) {
+        font_menu->add_action(GAction::create(font_name, [&terminal] (const GAction& action) {
             terminal.set_font(GFontDatabase::the().get_by_name(action.text()));
             terminal.force_repaint();
         }));
@@ -114,7 +114,7 @@ int main(int argc, char** argv)
     menubar->add_menu(move(font_menu));
 
     auto help_menu = make<GMenu>("Help");
-    help_menu->add_action(make<GAction>("About", [] (const GAction&) {
+    help_menu->add_action(GAction::create("About", [] (const GAction&) {
         dbgprintf("FIXME: Implement Help/About\n");
     }));
     menubar->add_menu(move(help_menu));

Kernel/i386.cpp

@@ -195,6 +195,36 @@ void exception_7_handler(RegisterDump& regs)
 }
 
 
+// 0: Divide error
+EH_ENTRY_NO_CODE(0);
+void exception_0_handler(RegisterDump& regs)
+{
+    kprintf("%s DIVIDE ERROR: %u(%s)\n", current->is_ring0() ? "Kernel" : "User", current->pid(), current->name().characters());
+
+    word ss;
+    dword esp;
+    if (current->is_ring0()) {
+        ss = regs.ds;
+        esp = regs.esp;
+    } else {
+        ss = regs.ss_if_crossRing;
+        esp = regs.esp_if_crossRing;
+    }
+
+    kprintf("pc=%w:%x ds=%w es=%w fs=%w gs=%w\n", regs.cs, regs.eip, regs.ds, regs.es, regs.fs, regs.gs);
+    kprintf("stk=%w:%x\n", ss, esp);
+    kprintf("eax=%x ebx=%x ecx=%x edx=%x\n", regs.eax, regs.ebx, regs.ecx, regs.edx);
+    kprintf("ebp=%x esp=%x esi=%x edi=%x\n", regs.ebp, esp, regs.esi, regs.edi);
+
+    if (current->is_ring0()) {
+        kprintf("Oh shit, we've crashed in ring 0 :(\n");
+        hang();
+    }
+
+    current->crash();
+}
+
+
 // 13: General Protection Fault
 EH_ENTRY(13);
 void exception_13_handler(RegisterDumpWithExceptionCode& regs)
@@ -316,7 +346,6 @@ void exception_14_handler(RegisterDumpWithExceptionCode& regs)
         hang(); \
     }
 
-EH(0, "Divide error")
 EH(1, "Debug exception")
 EH(2, "Unknown error")
 EH(3, "Breakpoint")
@@ -442,7 +471,7 @@ void idt_init()
     for (byte i = 0xff; i > 0x10; --i)
         register_interrupt_handler(i, unimp_trap);
 
-    register_interrupt_handler(0x00, _exception0);
+    register_interrupt_handler(0x00, exception_0_entry);
     register_interrupt_handler(0x01, _exception1);
     register_interrupt_handler(0x02, _exception2);
     register_interrupt_handler(0x03, _exception3);

LibGUI/GAction.cpp

@@ -1,8 +1,8 @@
 #include <LibGUI/GAction.h>
 
 GAction::GAction(const String& text, const String& custom_data, Function<void(const GAction&)> on_activation_callback)
-    : m_text(text)
-    , on_activation(move(on_activation_callback))
+    : on_activation(move(on_activation_callback))
+    , m_text(text)
     , m_custom_data(custom_data)
 {
 }
@@ -12,6 +12,13 @@ GAction::GAction(const String& text, Function<void(const GAction&)> on_activatio
 {
 }
 
+GAction::GAction(const String& text, RetainPtr<GraphicsBitmap>&& icon, Function<void(const GAction&)> on_activation_callback)
+    : on_activation(move(on_activation_callback))
+    , m_text(text)
+    , m_icon(move(icon))
+{
+}
+
 GAction::~GAction()
 {
 }

LibGUI/GAction.h

@@ -2,22 +2,41 @@
 
 #include <AK/AKString.h>
 #include <AK/Function.h>
+#include <AK/Retainable.h>
+#include <AK/RetainPtr.h>
+#include <SharedGraphics/GraphicsBitmap.h>
 
-class GAction {
+class GAction : public Retainable<GAction> {
 public:
-    GAction(const String& text, Function<void(const GAction&)> = nullptr);
-    GAction(const String& text, const String& custom_data = String(), Function<void(const GAction&)> = nullptr);
+    static RetainPtr<GAction> create(const String& text, Function<void(const GAction&)> callback)
+    {
+        return adopt(*new GAction(text, move(callback)));
+    }
+    static RetainPtr<GAction> create(const String& text, const String& custom_data, Function<void(const GAction&)> callback)
+    {
+        return adopt(*new GAction(text, custom_data, move(callback)));
+    }
+    static RetainPtr<GAction> create(const String& text, RetainPtr<GraphicsBitmap>&& icon, Function<void(const GAction&)> callback)
+    {
+        return adopt(*new GAction(text, move(icon), move(callback)));
+    }
     ~GAction();
 
     String text() const { return m_text; }
     String custom_data() const { return m_custom_data; }
+    const GraphicsBitmap* icon() const { return m_icon.ptr(); }
 
     Function<void(GAction&)> on_activation;
 
     void activate();
 
 private:
+    GAction(const String& text, Function<void(const GAction&)> = nullptr);
+    GAction(const String& text, RetainPtr<GraphicsBitmap>&& icon, Function<void(const GAction&)> = nullptr);
+    GAction(const String& text, const String& custom_data = String(), Function<void(const GAction&)> = nullptr);
+
     String m_text;
     String m_custom_data;
+    RetainPtr<GraphicsBitmap> m_icon;
 };
 

LibGUI/GBoxLayout.cpp

@@ -52,12 +52,14 @@ void GBoxLayout::run(GWidget& widget)
 
     Size automatic_size;
 
-    if (m_orientation == Orientation::Horizontal) {
-        automatic_size.set_width(available_size.width() / number_of_entries_with_automatic_size);
-        automatic_size.set_height(widget.height());
-    } else {
-        automatic_size.set_width(widget.width());
-        automatic_size.set_height(available_size.height() / number_of_entries_with_automatic_size);
+    if (number_of_entries_with_automatic_size) {
+        if (m_orientation == Orientation::Horizontal) {
+            automatic_size.set_width(available_size.width() / number_of_entries_with_automatic_size);
+            automatic_size.set_height(widget.height());
+        } else {
+            automatic_size.set_width(widget.width());
+            automatic_size.set_height(available_size.height() / number_of_entries_with_automatic_size);
+        }
     }
 
 #ifdef GBOXLAYOUT_DEBUG

LibGUI/GMenu.cpp

@@ -29,7 +29,7 @@ GMenu::~GMenu()
     unrealize_menu();
 }
 
-void GMenu::add_action(OwnPtr<GAction>&& action)
+void GMenu::add_action(RetainPtr<GAction>&& action)
 {
     m_items.append(make<GMenuItem>(move(action)));
 }

LibGUI/GMenu.h

@@ -15,7 +15,7 @@ public:
 
     GAction* action_at(size_t);
 
-    void add_action(OwnPtr<GAction>&&);
+    void add_action(RetainPtr<GAction>&&);
     void add_separator();
 
     Function<void(unsigned)> on_item_activation;

LibGUI/GMenuItem.cpp

@@ -6,7 +6,7 @@ GMenuItem::GMenuItem(Type type)
 {
 }
 
-GMenuItem::GMenuItem(OwnPtr<GAction>&& action)
+GMenuItem::GMenuItem(RetainPtr<GAction>&& action)
     : m_type(Action)
     , m_action(move(action))
 {

LibGUI/GMenuItem.h

@@ -9,7 +9,7 @@ public:
     enum Type { Invalid, Action, Separator };
 
     explicit GMenuItem(Type);
-    explicit GMenuItem(OwnPtr<GAction>&&);
+    explicit GMenuItem(RetainPtr<GAction>&&);
     ~GMenuItem();
 
     Type type() const { return m_type; }
@@ -21,6 +21,6 @@ public:
 private:
     Type m_type { Invalid };
     unsigned m_identifier { 0 };
-    OwnPtr<GAction> m_action;
+    RetainPtr<GAction> m_action;
 };
 

LibGUI/GToolBar.cpp

@@ -0,0 +1,58 @@
+#include <LibGUI/GToolBar.h>
+#include <LibGUI/GBoxLayout.h>
+#include <LibGUI/GButton.h>
+#include <LibGUI/GAction.h>
+#include <SharedGraphics/Painter.h>
+
+GToolBar::GToolBar(GWidget* parent)
+    : GWidget(parent)
+{
+    set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
+    set_preferred_size({ 0, 24 });
+    set_layout(make<GBoxLayout>(Orientation::Horizontal));
+}
+
+GToolBar::~GToolBar()
+{
+}
+
+void GToolBar::add_action(RetainPtr<GAction>&& action)
+{
+    ASSERT(action);
+    GAction* raw_action_ptr = action.ptr();
+    auto item = make<Item>();
+    item->type = Item::Action;
+    item->action = move(action);
+
+    auto* button = new GButton(this);
+    if (item->action->icon())
+        button->set_icon(item->action->icon());
+    else
+        button->set_caption(item->action->text());
+    button->on_click = [raw_action_ptr] (const GButton&) {
+        raw_action_ptr->activate();
+    };
+
+#if 0
+    // FIXME: Gotta fix GBoxLayout for this to work.
+    button->set_size_policy(SizePolicy::Fixed, SizePolicy::Fixed);
+    button->set_preferred_size({ 16, 16 });
+#endif
+
+    m_items.append(move(item));
+}
+
+void GToolBar::add_separator()
+{
+    auto item = make<Item>();
+    item->type = Item::Separator;
+    m_items.append(move(item));
+}
+
+void GToolBar::paint_event(GPaintEvent& event)
+{
+    Painter painter(*this);
+    painter.set_clip_rect(event.rect());
+    painter.fill_rect({ 0, 0, width(), height() - 1 }, Color::LightGray);
+    painter.draw_line({ 0, rect().bottom() }, { width() - 1, rect().bottom() }, Color::DarkGray);
+}

LibGUI/GToolBar.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <LibGUI/GWidget.h>
+
+class GAction;
+
+class GToolBar : public GWidget {
+public:
+    explicit GToolBar(GWidget* parent);
+    virtual ~GToolBar() override;
+
+    void add_action(RetainPtr<GAction>&&);
+    void add_separator();
+
+private:
+    virtual const char* class_name() const override { return "GToolBar"; }
+    virtual void paint_event(GPaintEvent&) override;
+
+    struct Item {
+        enum Type { Invalid, Separator, Action };
+        Type type { Invalid };
+        RetainPtr<GAction> action;
+    };
+    Vector<OwnPtr<Item>> m_items;
+};

LibGUI/GWidget.cpp

@@ -73,6 +73,13 @@ void GWidget::handle_paint_event(GPaintEvent& event)
     if (fill_with_background_color()) {
         Painter painter(*this);
         painter.fill_rect(event.rect(), background_color());
+    } else {
+#ifdef DEBUG_WIDGET_UNDERDRAW
+        // FIXME: This is a bit broken.
+        // If the widget is not opaque, let's not mess it up with debugging color.
+        Painter painter(*this);
+        painter.fill_rect(rect(), Color::Red);
+#endif
     }
     paint_event(event);
     for (auto* ch : children()) {

LibGUI/Makefile

@@ -27,6 +27,7 @@ LIBGUI_OBJS = \
     GApplication.o \
     GAction.o \
     GFontDatabase.o \
+    GToolBar.o \
     GWindow.o
 
 OBJS = $(SHAREDGRAPHICS_OBJS) $(LIBGUI_OBJS)

SharedGraphics/Painter.cpp

@@ -14,8 +14,6 @@
 #include <LibC/string.h>
 #endif
 
-#define DEBUG_WIDGET_UNDERDRAW
-
 Painter::Painter(GraphicsBitmap& bitmap)
 {
     m_font = &Font::default_font();
@@ -42,12 +40,6 @@ Painter::Painter(GWidget& widget)
     // NOTE: m_clip_rect is in Window coordinates since we are painting into its backing store.
     m_clip_rect = widget.window_relative_rect();
     m_clip_rect.intersect(m_target->rect());
-
-#ifdef DEBUG_WIDGET_UNDERDRAW
-    // If the widget is not opaque, let's not mess it up with debugging color.
-    if (widget.fill_with_background_color() && m_window->main_widget() != &widget)
-        fill_rect(widget.rect(), Color::Red);
-#endif
 }
 #endif