GScrollableWidget: Add to_content_position(Point)

A handy helper function for converting a widget space coordinate into a
content space coordinate.

2 files changed, 10 insertions, 0 deletions

diff --git a/Libraries/LibGUI/GScrollableWidget.cpp b/Libraries/LibGUI/GScrollableWidget.cpp
index 246158d9f4..e9fb3bc464 100644
--- a/Libraries/LibGUI/GScrollableWidget.cpp
+++ b/Libraries/LibGUI/GScrollableWidget.cpp
@@ -180,3 +180,11 @@ Rect GScrollableWidget::widget_inner_rect() const
     rect.set_height(rect.height() - height_occupied_by_horizontal_scrollbar());
     return rect;
 }
+
+Point GScrollableWidget::to_content_position(const Point& widget_position) const
+{
+    auto content_position = widget_position;
+    content_position.move_by(horizontal_scrollbar().value(), vertical_scrollbar().value());
+    content_position.move_by(-frame_thickness(), -frame_thickness());
+    return content_position;
+}
diff --git a/Libraries/LibGUI/GScrollableWidget.h b/Libraries/LibGUI/GScrollableWidget.h
index dbef80042a..a5231cc456 100644
--- a/Libraries/LibGUI/GScrollableWidget.h
+++ b/Libraries/LibGUI/GScrollableWidget.h
@@ -41,6 +41,8 @@ public:
     void set_should_hide_unnecessary_scrollbars(bool b) { m_should_hide_unnecessary_scrollbars = b; }
     bool should_hide_unnecessary_scrollbars() const { return m_should_hide_unnecessary_scrollbars; }
 
+    Point to_content_position(const Point& widget_position) const;
+
 protected:
     explicit GScrollableWidget(GWidget* parent);
     virtual void custom_layout() override;