LibGUI: Enable/Disable the Open button on text change in FilePicker

Prior this change, the button was updated on user selection change
in the file view.

This isn't quite right, as you could remove the text from the text box
or (even worse) start typing a filename there and the button state
wouldn't change.

1 files changed, 5 insertions, 2 deletions

diff --git a/Userland/Libraries/LibGUI/FilePicker.cpp b/Userland/Libraries/LibGUI/FilePicker.cpp
index 380b207a4e..a98993333b 100644
--- a/Userland/Libraries/LibGUI/FilePicker.cpp
+++ b/Userland/Libraries/LibGUI/FilePicker.cpp
@@ -187,7 +187,11 @@ FilePicker::FilePicker(Window* parent_window, Mode mode, const StringView& filen
         done(ExecCancel);
     };
 
-    m_view->on_selection_change = [this, &ok_button] {
+    m_filename_textbox->on_change = [&] {
+        ok_button.set_enabled(!m_filename_textbox->text().is_empty());
+    };
+
+    m_view->on_selection_change = [this] {
         auto index = m_view->selection().first();
         auto& filter_model = (SortingProxyModel&)*m_view->model();
         auto local_index = filter_model.map_to_source(index);
@@ -199,7 +203,6 @@ FilePicker::FilePicker(Window* parent_window, Mode mode, const StringView& filen
         } else if (m_mode != Mode::Save) {
             m_filename_textbox->clear();
         }
-        ok_button.set_enabled(!m_filename_textbox->text().is_empty());
     };
 
     m_view->on_activation = [this](auto& index) {