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diff --git a/src/curveeditor/detail/treeview.cpp b/src/curveeditor/detail/treeview.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt Design Tooling
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#include "treeview.h"
+#include "curveeditormodel.h"
+#include "curveitem.h"
+#include "treeitem.h"
+#include "treeitemdelegate.h"
+
+#include <QHeaderView>
+#include <QMouseEvent>
+
+namespace DesignTools {
+
+TreeView::TreeView(CurveEditorModel *model, QWidget *parent)
+    : QTreeView(parent)
+{
+    setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
+    setUniformRowHeights(true);
+    setRootIsDecorated(false);
+    setMouseTracking(true);
+    setHeaderHidden(true);
+
+    model->setParent(this);
+    setModel(model);
+
+    auto expandItems = [this]() { expandAll(); };
+    connect(model, &QAbstractItemModel::modelReset, expandItems);
+
+    auto *delegate = new TreeItemDelegate(model->style(), this);
+    setItemDelegate(delegate);
+
+    setSelectionBehavior(QAbstractItemView::SelectRows);
+    setSelectionMode(QAbstractItemView::ExtendedSelection);
+
+    connect(selectionModel(), &QItemSelectionModel::selectionChanged, this, &TreeView::changeSelection);
+    setStyle(model->style());
+
+    header()->setSectionResizeMode(0, QHeaderView::Stretch);
+    header()->setSectionResizeMode(1, QHeaderView::Fixed);
+    header()->setSectionResizeMode(2, QHeaderView::Fixed);
+
+    header()->setStretchLastSection(false);
+    header()->resizeSection(1, 20);
+    header()->resizeSection(2, 20);
+}
+
+void TreeView::setStyle(const CurveEditorStyle &style)
+{
+    QPalette pal = palette();
+    pal.setBrush(QPalette::Base, style.backgroundBrush);
+    pal.setBrush(QPalette::Button, style.backgroundAlternateBrush);
+    pal.setBrush(QPalette::Text, style.fontColor);
+
+    // Tmp to see what happens on windows/macOS.
+    pal.setBrush(backgroundRole(), Qt::white);
+    pal.setBrush(foregroundRole(), Qt::white);
+
+    setPalette(pal);
+
+    if (auto *delegate = qobject_cast<TreeItemDelegate *>(itemDelegate()))
+        delegate->setStyle(style);
+}
+
+void TreeView::changeCurve(unsigned int id, const AnimationCurve &curve)
+{
+    if (auto *curveModel = qobject_cast<CurveEditorModel *>(model()))
+        curveModel->setCurve(id, curve);
+}
+
+void TreeView::changeSelection(const QItemSelection &selected, const QItemSelection &deselected)
+{
+    Q_UNUSED(selected);
+    Q_UNUSED(deselected);
+
+    std::vector<CurveItem *> curves;
+    for (auto index : selectedIndexes()) {
+        if (index.isValid() && index.column() == 0) {
+            auto *treeItem = static_cast<TreeItem *>(index.internalPointer());
+            if (auto *propertyItem = treeItem->asPropertyItem())
+                curves.push_back(new CurveItem(treeItem->id(), propertyItem->curve()));
+        }
+    }
+
+    emit curvesSelected(curves);
+}
+
+QSize TreeView::sizeHint() const
+{
+    return QSize(170, 300);
+}
+
+void TreeView::mousePressEvent(QMouseEvent *event)
+{
+    QModelIndex index = indexAt(event->pos());
+    if (index.isValid()) {
+        auto *treeItem = static_cast<TreeItem *>(index.internalPointer());
+        if (index.column() == 1)
+            treeItem->setLocked(!treeItem->locked());
+        else if (index.column() == 2)
+            treeItem->setPinned(!treeItem->pinned());
+    }
+    QTreeView::mousePressEvent(event);
+}
+
+} // End namespace DesignTools.