From de87a105b0cbcc73440a2613af6446d0e8819fb6 Mon Sep 17 00:00:00 2001
From: Mikaël Capelle <capelle.mikael@gmail.com>
Date: Tue, 29 Dec 2020 14:24:33 +0100
Subject: Fix indentation and drop indicator.

---
 src/modlistview.cpp | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'src/modlistview.cpp')

diff --git a/src/modlistview.cpp b/src/modlistview.cpp
index bfc8e385..593d3772 100644
--- a/src/modlistview.cpp
+++ b/src/modlistview.cpp
@@ -2,6 +2,49 @@
 #include <widgetutility.h>
 #include <QUrl>
 #include <QMimeData>
+#include <QProxyStyle>
+
+class ModListProxyStyle : public QProxyStyle {
+public:
+
+  using QProxyStyle::QProxyStyle;
+
+  void drawPrimitive(PrimitiveElement element, const QStyleOption* option, QPainter* painter, const QWidget* widget) const
+  {
+    if (element == QStyle::PE_IndicatorItemViewItemDrop)
+    {
+      QStyleOption opt(*option);
+      opt.rect.setLeft(20);
+      if (auto* view = qobject_cast<const QTreeView*>(widget)) {
+        opt.rect.setRight(widget->width());
+      }
+      QProxyStyle::drawPrimitive(element, &opt, painter, widget);
+    }
+    else {
+      QProxyStyle::drawPrimitive(element, option, painter, widget);
+    }
+  }
+};
+
+class ModListStyledItemDelegated : public QStyledItemDelegate
+{
+public:
+  using QStyledItemDelegate::QStyledItemDelegate;
+  void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const override {
+    QStyleOptionViewItem opt(option);
+    if (index.column() == 0)
+      opt.rect.adjust(opt.rect.height(), 0, 0, 0);
+    QStyledItemDelegate::paint(painter, opt, index);
+    if (index.column() == 0) {
+      QStyleOptionViewItem branch;
+      branch.rect = QRect(0, opt.rect.y(), opt.rect.height(), opt.rect.height());
+      branch.state = option.state;
+      const QWidget* widget = option.widget;
+      QStyle* style = widget ? widget->style() : QApplication::style();
+      style->drawPrimitive(QStyle::PE_IndicatorBranch, &branch, painter, widget);
+    }
+  }
+};
 
 ModListView::ModListView(QWidget* parent)
   : QTreeView(parent)
@@ -10,6 +53,10 @@ ModListView::ModListView(QWidget* parent)
   setVerticalScrollBar(m_scrollbar);
   MOBase::setCustomizableColumns(this);
   setAutoExpandDelay(1000);
+
+  setIndentation(0);
+  setStyle(new ModListProxyStyle(style()));
+  setItemDelegate(new ModListStyledItemDelegated(this));
 }
 
 void ModListView::setModel(QAbstractItemModel* model)
-- 
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