LibGUI: Add a GItemView class.

This is a GAbstractView subclass that implements a icon-based view onto
a GModel. It still need a bunch of work, but it's in basic usable shape.

1 files changed, 11 insertions, 4 deletions

diff --git a/LibGUI/GScrollableWidget.cpp b/LibGUI/GScrollableWidget.cpp
index 8a7be7536c..a47e99e1d6 100644
--- a/LibGUI/GScrollableWidget.cpp
+++ b/LibGUI/GScrollableWidget.cpp
@@ -39,14 +39,21 @@ void GScrollableWidget::resize_event(GResizeEvent& event)
     }
 }
 
-void GScrollableWidget::update_scrollbar_ranges()
+Size GScrollableWidget::available_size() const
 {
+    int available_width = width() - m_size_occupied_by_fixed_elements.width() - width_occupied_by_vertical_scrollbar();
     int available_height = height() - m_size_occupied_by_fixed_elements.height() - height_occupied_by_horizontal_scrollbar();
-    int excess_height = max(0, m_content_size.height() - available_height);
+    return { available_width, available_height };
+}
+
+void GScrollableWidget::update_scrollbar_ranges()
+{
+    auto available_size = this->available_size();
+
+    int excess_height = max(0, m_content_size.height() - available_size.height());
     m_vertical_scrollbar->set_range(0, excess_height);
 
-    int available_width = width() - m_size_occupied_by_fixed_elements.width() - width_occupied_by_vertical_scrollbar();
-    int excess_width = max(0, m_content_size.width() - available_width);
+    int excess_width = max(0, m_content_size.width() - available_size.width());
     m_horizontal_scrollbar->set_range(0, excess_width);
 
     m_vertical_scrollbar->set_big_step(visible_content_rect().height() - m_vertical_scrollbar->step());