Presenter: Accept file drops

Author: https://github.com/krkk
Commit: https://github.com/SerenityOS/serenity/commit/780d46c424
Pull-request: https://github.com/SerenityOS/serenity/pull/16713

Userland/Applications/Presenter/PresenterWidget.cpp

@@ -8,6 +8,7 @@
 #include "LibGUI/MessageBox.h"
 #include "Presentation.h"
 #include <AK/Format.h>
+#include <LibCore/MimeData.h>
 #include <LibFileSystemAccessClient/Client.h>
 #include <LibGUI/Action.h>
 #include <LibGUI/Event.h>
@@ -132,3 +133,24 @@ void PresenterWidget::paint_event([[maybe_unused]] GUI::PaintEvent& event)
 
     m_current_presentation->paint(painter);
 }
+
+void PresenterWidget::drag_enter_event(GUI::DragEvent& event)
+{
+    auto const& mime_types = event.mime_types();
+    if (mime_types.contains_slow("text/uri-list"))
+        event.accept();
+}
+
+void PresenterWidget::drop_event(GUI::DropEvent& event)
+{
+    event.accept();
+
+    if (event.mime_data().has_urls()) {
+        auto urls = event.mime_data().urls();
+        if (urls.is_empty())
+            return;
+
+        window()->move_to_front();
+        set_file(urls.first().path());
+    }
+}

Userland/Applications/Presenter/PresenterWidget.h

@@ -30,6 +30,8 @@ public:
 protected:
     virtual void paint_event(GUI::PaintEvent&) override;
     virtual void keydown_event(GUI::KeyEvent&) override;
+    virtual void drag_enter_event(GUI::DragEvent&) override;
+    virtual void drop_event(GUI::DropEvent&) override;
 
 private:
     OwnPtr<Presentation> m_current_presentation;