Add smaller statusbar and set it as default

- Statusbar has three modes: Small, FullWidth and Disabled
- FullWidth is the original statusbar
- Small is the new default statusbar
  - This statusbar overlays on top of the items instead of taking space
  - It changes size according to content
- Disabled turns statusbar completely off
- Zoom slider and space information is only shown in full-width statusbar
  - Space information is now always on
- If user navigates with keyboard, or scrolls to selection, the scrolling will take the statusbar into account
  - This makes sure the statusbar does not cover any items

Related discussion: https://invent.kde.org/system/dolphin/-/issues/50

2 files changed, 17 insertions, 0 deletions

diff --git a/src/kitemviews/private/kitemlistviewlayouter.cpp b/src/kitemviews/private/kitemlistviewlayouter.cpp
index 99a95d98c..3ed2343a8 100644
--- a/src/kitemviews/private/kitemlistviewlayouter.cpp
+++ b/src/kitemviews/private/kitemlistviewlayouter.cpp
@@ -40,6 +40,7 @@ KItemListViewLayouter::KItemListViewLayouter(KItemListSizeHintResolver *sizeHint
     , m_groupHeaderHeight(0)
     , m_groupHeaderMargin(0)
     , m_itemInfos()
+    , m_statusBarOffset(0)
 {
     Q_ASSERT(m_sizeHintResolver);
 }
@@ -341,6 +342,13 @@ void KItemListViewLayouter::markAsDirty()
     m_dirty = true;
 }
 
+void KItemListViewLayouter::setStatusBarOffset(int offset)
+{
+    if (m_statusBarOffset != offset) {
+        m_statusBarOffset = offset;
+    }
+}
+
 #ifndef QT_NO_DEBUG
 bool KItemListViewLayouter::isDirty()
 {
@@ -378,6 +386,7 @@ void KItemListViewLayouter::doLayout()
         itemSize.transpose();
         itemMargin.transpose();
         size.transpose();
+        size.rwidth() -= m_statusBarOffset;
 
         if (grouped) {
             // In the horizontal scrolling case all groups are aligned
diff --git a/src/kitemviews/private/kitemlistviewlayouter.h b/src/kitemviews/private/kitemlistviewlayouter.h
index 77d59c947..fed541a4c 100644
--- a/src/kitemviews/private/kitemlistviewlayouter.h
+++ b/src/kitemviews/private/kitemlistviewlayouter.h
@@ -154,6 +154,12 @@ public:
         return m_columnCount;
     }
 
+    /**
+     * Set the bottom offset for moving the view so that the small overlayed statusbar
+     * won't cover any items by accident.
+     */
+    void setStatusBarOffset(int offset);
+
 #ifndef QT_NO_DEBUG
     /**
      * @return True if the layouter has been marked as dirty and hence has
@@ -219,6 +225,8 @@ private:
     };
     QVector<ItemInfo> m_itemInfos;
 
+    int m_statusBarOffset;
+
     friend class KItemListControllerTest;
 };