From e5f43788e874e638e1d4dbab20451c36e52df10d Mon Sep 17 00:00:00 2001
From: Mikaël Capelle <capelle.mikael@gmail.com>
Date: Fri, 1 Jan 2021 13:51:36 +0100
Subject: Visual fixes for the modlist.

- Fix invalid positions of markers in the scrollbar.
- Use color from children for collapsed elements (background and markers).
---
 src/modlistbypriorityproxy.cpp | 46 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

(limited to 'src/modlistbypriorityproxy.cpp')

diff --git a/src/modlistbypriorityproxy.cpp b/src/modlistbypriorityproxy.cpp
index 749991d0..7ef540b0 100644
--- a/src/modlistbypriorityproxy.cpp
+++ b/src/modlistbypriorityproxy.cpp
@@ -181,6 +181,52 @@ bool ModListByPriorityProxy::hasChildren(const QModelIndex& parent) const
   return item->children.size() > 0;
 }
 
+QVariant ModListByPriorityProxy::data(const QModelIndex& index, int role) const
+{
+  auto sourceIndex = mapToSource(index);
+  if (!sourceIndex.isValid()) {
+    return QVariant();
+  }
+
+  auto sourceData = sourceModel()->data(sourceIndex, role);
+  if (role != Qt::BackgroundRole && role != ModList::ScrollMarkRole) {
+    return sourceData;
+  }
+
+  if (!hasChildren(index)) {
+    return sourceData;
+  }
+
+  bool expanded = !m_CollapsedItems.contains(index.sibling(index.row(), 0).data(Qt::DisplayRole).toString());
+
+  if (expanded) {
+    return sourceData;
+  }
+
+  // this is a non-expanded item
+  std::vector<QColor> colors;
+  for (int i = 0; i < rowCount(index); ++i) {
+    auto childData = sourceModel()->data(mapToSource(this->index(i, index.column(), index)), role);
+    if (childData.isValid() && childData.canConvert<QColor>()) {
+      colors.push_back(childData.value<QColor>());
+    }
+  }
+
+  if (true || colors.empty()) {
+    return sourceData;
+  }
+
+  int r = 0, g = 0, b = 0, a = 0;
+  for (auto& color : colors) {
+    r += color.red();
+    g += color.green();
+    b += color.blue();
+    a += color.alpha();
+  }
+
+  return QColor(r / colors.size(), g / colors.size(), b / colors.size(), a / colors.size());
+}
+
 bool ModListByPriorityProxy::setData(const QModelIndex& index, const QVariant& value, int role)
 {
   // only care about the "name" column
-- 
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