GMessageBox: Add icons to message boxes with 3 standard ones to choose from.

Applications/FileManager/main.cpp

@@ -90,8 +90,7 @@ int main(int argc, char** argv)
             );
             int rc = mkdir(new_dir_path.characters(), 0777);
             if (rc < 0) {
-                GMessageBox message_box(String::format("mkdir() failed: %s", strerror(errno)), "Error", window);
-                message_box.exec();
+                GMessageBox::show(String::format("mkdir() failed: %s", strerror(errno)), "Error", GMessageBox::Type::Error, window);
             } else {
                 directory_view->refresh();
             }

DevTools/VisualBuilder/VBForm.cpp

@@ -307,8 +307,7 @@ void VBForm::write_to_file(const String& path)
 {
     CFile file(path);
     if (!file.open(CIODevice::WriteOnly)) {
-        GMessageBox box(String::format("Could not open '%s' for writing", path.characters()), "Error", window());
-        box.exec();
+        GMessageBox::show(String::format("Could not open '%s' for writing", path.characters()), "Error", GMessageBox::Type::Error, window());
         return;
     }
     file.printf("[Form]\n");

LibGUI/GMessageBox.cpp

@@ -2,10 +2,18 @@
 #include <LibGUI/GBoxLayout.h>
 #include <LibGUI/GLabel.h>
 #include <LibGUI/GButton.h>
+#include <stdio.h>
 
-GMessageBox::GMessageBox(const String& text, const String& title, CObject* parent)
+void GMessageBox::show(const String& text, const String& title, Type type, CObject* parent)
+{
+    GMessageBox box(text, title, type, parent);
+    box.exec();
+}
+
+GMessageBox::GMessageBox(const String& text, const String& title, Type type, CObject* parent)
     : GDialog(parent)
     , m_text(text)
+    , m_type(type)
 {
     set_title(title);
     build();
@@ -15,14 +23,27 @@ GMessageBox::~GMessageBox()
 {
 }
 
+RetainPtr<GraphicsBitmap> GMessageBox::icon() const
+{
+    switch (m_type) {
+    case Type::Information:
+        return GraphicsBitmap::load_from_file("/res/icons/32x32/msgbox-information.png");
+    case Type::Warning:
+        return GraphicsBitmap::load_from_file("/res/icons/32x32/msgbox-warning.png");
+    case Type::Error:
+        return GraphicsBitmap::load_from_file("/res/icons/32x32/msgbox-error.png");
+    default:
+        return nullptr;
+    }
+}
+
 void GMessageBox::build()
 {
     auto* widget = new GWidget;
     set_main_widget(widget);
 
     int text_width = widget->font().width(m_text);
-
-    set_rect(x(), y(), text_width + 80, 80);
+    int icon_width = 0;
 
     widget->set_layout(make<GBoxLayout>(Orientation::Vertical));
     widget->set_fill_with_background_color(true);
@@ -30,8 +51,22 @@ void GMessageBox::build()
     widget->layout()->set_margins({ 0, 15, 0, 15 });
     widget->layout()->set_spacing(15);
 
-    auto* label = new GLabel(m_text, widget);
-    label->set_size_policy(SizePolicy::Fixed, SizePolicy::Fixed);
+    GWidget* message_container = widget;
+    if (m_type != Type::None) {
+        message_container = new GWidget(widget);
+        message_container->set_layout(make<GBoxLayout>(Orientation::Horizontal));
+        message_container->layout()->set_margins({ 8, 0, 8, 0 });
+        message_container->layout()->set_spacing(8);
+
+        auto* icon_label = new GLabel(message_container);
+        icon_label->set_size_policy(SizePolicy::Fixed, SizePolicy::Fixed);
+        icon_label->set_preferred_size({ 32, 32 });
+        icon_label->set_icon(icon());
+        icon_width = icon_label->icon()->width();
+    }
+
+    auto* label = new GLabel(m_text, message_container);
+    label->set_size_policy(SizePolicy::Fill, SizePolicy::Fixed);
     label->set_preferred_size({ text_width, 16 });
 
     auto* button = new GButton(widget);
@@ -42,4 +77,7 @@ void GMessageBox::build()
         dbgprintf("GMessageBox: OK button clicked\n");
         done(0);
     };
+
+    set_rect(x(), y(), text_width + icon_width + 80, 100);
+    set_resizable(false);
 }

LibGUI/GMessageBox.h

@@ -4,11 +4,22 @@
 
 class GMessageBox : public GDialog {
 public:
-    explicit GMessageBox(const String& text, const String& title, CObject* parent = nullptr);
+    enum class Type {
+        None,
+        Information,
+        Warning,
+        Error,
+    };
+
+    explicit GMessageBox(const String& text, const String& title, Type type = Type::None, CObject* parent = nullptr);
     virtual ~GMessageBox() override;
 
+    static void show(const String& text, const String& title, Type type = Type::None, CObject* parent = nullptr);
+
 private:
     void build();
+    RetainPtr<GraphicsBitmap> icon() const;
 
     String m_text;
+    Type m_type { Type::None };
 };