From 6e77dce573ba7329c4ed9b6f701010d354060f6e Mon Sep 17 00:00:00 2001
From: Sergio Martins <sergio.martins@kdab.com>
Date: Wed, 10 Jun 2020 18:54:34 +0100
Subject: [PATCH] Add Item::neighboursMaxLengthFor()

---
 src/private/multisplitter/Item.cpp | 31 ++++++++++++++++++++++++++++++
 src/private/multisplitter/Item_p.h |  1 +
 2 files changed, 32 insertions(+)

diff --git a/src/private/multisplitter/Item.cpp b/src/private/multisplitter/Item.cpp
index 65452579..bd97b1f2 100644
--- a/src/private/multisplitter/Item.cpp
+++ b/src/private/multisplitter/Item.cpp
@@ -2588,6 +2588,37 @@ int ItemContainer::neighboursMinLengthFor(const Item *item, Side side, Qt::Orien
     }
 }
 
+int ItemContainer::neighboursMaxLengthFor(const Item *item, Side side, Qt::Orientation o) const
+{
+    const Item::List children = visibleChildren();
+    const int index = children.indexOf(const_cast<Item*>(item));
+    if (index == -1) {
+        qWarning() << Q_FUNC_INFO << "Couldn't find item" << item;
+        return 0;
+    }
+
+    if (o == d->m_orientation) {
+        int neighbourMaxLength = 0;
+        int start = 0;
+        int end = -1;
+        if (side == Side1) {
+            start = 0;
+            end = index - 1;
+        } else {
+            start = index + 1;
+            end = children.size() - 1;
+        }
+
+        for (int i = start; i <= end; ++i)
+            neighbourMaxLength = qMin(length(), neighbourMaxLength + children.at(i)->maxLengthHint(d->m_orientation));
+
+         return neighbourMaxLength;
+    } else {
+        // No neighbours here
+        return 0;
+    }
+}
+
 int ItemContainer::availableOnSide(const Item *child, Side side) const
 {
     const int length = neighboursLengthFor(child, side, d->m_orientation);
diff --git a/src/private/multisplitter/Item_p.h b/src/private/multisplitter/Item_p.h
index ad5dca65..893bb9a9 100644
--- a/src/private/multisplitter/Item_p.h
+++ b/src/private/multisplitter/Item_p.h
@@ -464,6 +464,7 @@ private:
     int neighboursLengthFor(const Item *item, Side, Qt::Orientation) const;
     int neighboursLengthFor_recursive(const Item *item, Side, Qt::Orientation) const;
     int neighboursMinLengthFor(const Item *item, Side, Qt::Orientation) const;
+    int neighboursMaxLengthFor(const Item *item, Side, Qt::Orientation) const;
     int availableOnSide(const Item *child, Side) const;
     int availableOnSide_recursive(const Item *child, Side, Qt::Orientation orientation) const;
     void onChildMinSizeChanged(Item *child);