1 files changed, 141 insertions, 0 deletions
diff --git a/src/curveeditor/detail/graphicsscene.cpp b/src/curveeditor/detail/graphicsscene.cpp
new file mode 100644
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+++ b/src/curveeditor/detail/graphicsscene.cpp
@@ -0,0 +1,141 @@
+/****************************************************************************
+**
+** 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 "graphicsscene.h"
+#include "animationcurve.h"
+#include "curveitem.h"
+
+#include <QGraphicsSceneMouseEvent>
+
+namespace DesignTools {
+
+GraphicsScene::GraphicsScene(QObject *parent)
+    : QGraphicsScene(parent)
+    , m_dirty(true)
+    , m_limits()
+{}
+
+double GraphicsScene::minimumTime() const
+{
+    return limits().left();
+}
+
+double GraphicsScene::maximumTime() const
+{
+    return limits().right();
+}
+
+double GraphicsScene::minimumValue() const
+{
+    return limits().bottom();
+}
+
+double GraphicsScene::maximumValue() const
+{
+    return limits().top();
+}
+
+void GraphicsScene::addCurveItem(CurveItem *item)
+{
+    m_dirty = true;
+    addItem(item);
+}
+
+void GraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent)
+{
+    QGraphicsScene::mouseMoveEvent(mouseEvent);
+
+    if (!mouseEvent->isAccepted()) {
+        const auto itemList = items();
+        for (auto *item : itemList) {
+            if (auto *curveItem = qgraphicsitem_cast<CurveItem *>(item)) {
+                curveItem->setPreSelected(curveItem->contains(mouseEvent->scenePos()));
+            }
+        }
+    }
+}
+
+void GraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent)
+{
+    QGraphicsScene::mouseReleaseEvent(mouseEvent);
+
+    clearSelection();
+
+    const auto itemList = items();
+    for (auto *item : itemList) {
+        if (auto *curveItem = qgraphicsitem_cast<CurveItem *>(item)) {
+            if (curveItem->contains(mouseEvent->scenePos()))
+                curveItem->setSelected(true);
+
+            if (curveItem->isDirty()) {
+                m_dirty = true;
+                emit curveChanged(curveItem->id(), curveItem->curve());
+                curveItem->setDirty(false);
+            }
+        }
+    }
+}
+
+QRectF GraphicsScene::limits() const
+{
+    if (m_dirty) {
+        QPointF min(std::numeric_limits<double>::max(), std::numeric_limits<double>::max());
+        QPointF max(std::numeric_limits<double>::lowest(), std::numeric_limits<double>::lowest());
+
+        const auto itemList = items();
+        for (auto *item : itemList) {
+            if (auto *curveItem = qgraphicsitem_cast<CurveItem *>(item)) {
+                auto curve = curveItem->curve();
+                if (min.x() > curve.minimumTime())
+                    min.rx() = curve.minimumTime();
+
+                if (min.y() > curve.minimumValue())
+                    min.ry() = curve.minimumValue();
+
+                if (max.x() < curve.maximumTime())
+                    max.rx() = curve.maximumTime();
+
+                if (max.y() < curve.maximumValue())
+                    max.ry() = curve.maximumValue();
+            }
+        }
+
+        m_limits = QRectF(QPointF(min.x(), max.y()), QPointF(max.x(), min.y()));
+        m_dirty = false;
+    }
+    return m_limits;
+}
+
+void GraphicsScene::clearSelection()
+{
+    const auto itemList = items();
+    for (auto *item : itemList) {
+        if (auto *curveItem = qgraphicsitem_cast<CurveItem *>(item)) {
+            curveItem->setSelected(false);
+        }
+    }
+}
+
+} // End namespace DesignTools.