diff --git a/Userland/Libraries/LibGUI/Dialog.cpp b/Userland/Libraries/LibGUI/Dialog.cpp
index 3d6767010a..199ea47326 100644
--- a/Userland/Libraries/LibGUI/Dialog.cpp
+++ b/Userland/Libraries/LibGUI/Dialog.cpp
@@ -115,6 +115,8 @@ void Dialog::done(ExecResult result)
     if (!m_event_loop)
         return;
     m_result = result;
+    on_done(m_result);
+
     dbgln("{}: Quit event loop with result {}", *this, to_underlying(result));
     m_event_loop->quit(to_underlying(result));
 }
diff --git a/Userland/Libraries/LibGUI/Dialog.h b/Userland/Libraries/LibGUI/Dialog.h
index 4f7b869932..a78b9536a3 100644
--- a/Userland/Libraries/LibGUI/Dialog.h
+++ b/Userland/Libraries/LibGUI/Dialog.h
@@ -52,6 +52,8 @@ public:
 protected:
     explicit Dialog(Window* parent_window, ScreenPosition = ScreenPosition::CenterWithinParent);
 
+    virtual void on_done(ExecResult) { }
+
 private:
     OwnPtr<Core::EventLoop> m_event_loop;
     ExecResult m_result { ExecResult::Aborted };
diff --git a/Userland/Libraries/LibGUI/InputBox.cpp b/Userland/Libraries/LibGUI/InputBox.cpp
index 0fffa1e9dc..1bc8b9478e 100644
--- a/Userland/Libraries/LibGUI/InputBox.cpp
+++ b/Userland/Libraries/LibGUI/InputBox.cpp
@@ -15,9 +15,9 @@
 
 namespace GUI {
 
-InputBox::InputBox(Window* parent_window, String& text_value, StringView prompt, StringView title, StringView placeholder, InputType input_type)
+InputBox::InputBox(Window* parent_window, String text_value, StringView prompt, StringView title, StringView placeholder, InputType input_type)
     : Dialog(parent_window)
-    , m_text_value(text_value)
+    , m_text_value(move(text_value))
     , m_prompt(prompt)
     , m_placeholder(placeholder)
 {
@@ -36,6 +36,17 @@ Dialog::ExecResult InputBox::show(Window* parent_window, String& text_value, Str
     return result;
 }
 
+void InputBox::set_text_value(String text_value)
+{
+    m_text_editor->set_text(move(text_value));
+}
+
+void InputBox::on_done(ExecResult result)
+{
+    if (result == ExecResult::OK)
+        m_text_value = m_text_editor->text();
+}
+
 void InputBox::build(InputType input_type)
 {
     auto& widget = set_main_widget<Widget>();
@@ -86,7 +97,6 @@ void InputBox::build(InputType input_type)
     m_ok_button->set_text("OK");
     m_ok_button->on_click = [this](auto) {
         dbgln("GUI::InputBox: OK button clicked");
-        m_text_value = m_text_editor->text();
         done(ExecResult::OK);
     };
     m_ok_button->set_default(true);
diff --git a/Userland/Libraries/LibGUI/InputBox.h b/Userland/Libraries/LibGUI/InputBox.h
index f34c542035..2c15bda02f 100644
--- a/Userland/Libraries/LibGUI/InputBox.h
+++ b/Userland/Libraries/LibGUI/InputBox.h
@@ -24,12 +24,15 @@ public:
 
     static ExecResult show(Window* parent_window, String& text_value, StringView prompt, StringView title, StringView placeholder = {}, InputType input_type = InputType::Text);
 
+    String const& text_value() const { return m_text_value; }
+    void set_text_value(String text_value);
+
 private:
-    explicit InputBox(Window* parent_window, String& text_value, StringView prompt, StringView title, StringView placeholder, InputType input_type);
-
-    String text_value() const { return m_text_value; }
+    explicit InputBox(Window* parent_window, String text_value, StringView prompt, StringView title, StringView placeholder, InputType input_type);
 
+    virtual void on_done(ExecResult) override;
     void build(InputType input_type);
+
     String m_text_value;
     String m_prompt;
     String m_placeholder;