ScxmlEditor: Initial import

Change-Id: I4701b77ebd4e2520f2616c42206ac17be3a12b60
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 146 insertions, 0 deletions

diff --git a/src/plugins/scxmleditor/plugin_interface/connectableitem.h b/src/plugins/scxmleditor/plugin_interface/connectableitem.h
new file mode 100644
index 0000000000..93217ddfa0
--- /dev/null
+++ b/src/plugins/scxmleditor/plugin_interface/connectableitem.h
@@ -0,0 +1,146 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "baseitem.h"
+#include "transitionitem.h"
+
+#include <QPen>
+
+QT_FORWARD_DECLARE_CLASS(QGraphicsSceneMouseEvent)
+
+namespace ScxmlEditor {
+
+namespace PluginInterface {
+
+class CornerGrabberItem;
+class HighlightItem;
+class QuickTransitionItem;
+
+/**
+ * @brief The ConnectableItem class is the base class for all draggable state-items.
+ */
+class ConnectableItem : public BaseItem
+{
+    Q_OBJECT
+
+public:
+    explicit ConnectableItem(const QPointF &pos, BaseItem *parent = nullptr);
+    ~ConnectableItem() override;
+
+    QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
+    bool sceneEventFilter(QGraphicsItem *watched, QEvent *event) override;
+
+    void addOutputTransition(TransitionItem *transition);
+    void addInputTransition(TransitionItem *transition);
+    void removeOutputTransition(TransitionItem *transition);
+    void removeInputTransition(TransitionItem *transition);
+    QVector<TransitionItem*> outputTransitions() const;
+    QVector<TransitionItem*> inputTransitions() const;
+
+    void setMinimumWidth(int width);
+    void setMinimumHeight(int height);
+    int minHeight() const
+    {
+        return m_minimumHeight;
+    }
+
+    int minWidth() const
+    {
+        return m_minimumWidth;
+    }
+
+    void finalizeCreation() override;
+    void init(ScxmlTag *tag, BaseItem *parentItem = nullptr, bool initChildren = true, bool blockUpdates = false) override;
+
+    void updateUIProperties() override;
+    void updateAttributes() override;
+    void updateEditorInfo(bool allChildren = false) override;
+    void moveStateBy(qreal dx, qreal dy) override;
+    void setHighlight(bool hl) override;
+
+    int transitionCount() const;
+    int outputTransitionCount() const;
+    int inputTransitionCount() const;
+    bool hasInputTransitions(const ConnectableItem *parentItem, bool checkChildren = false) const;
+    bool hasOutputTransitions(const ConnectableItem *parentItem, bool checkChildren = false) const;
+    QPointF getInternalPosition(const TransitionItem *transition, TransitionItem::TransitionTargetType type) const;
+
+    void updateOutputTransitions();
+    void updateInputTransitions();
+    void updateTransitions(bool allChildren = false);
+    void updateTransitionAttributes(bool allChildren = false);
+
+    void addOverlappingItem(ConnectableItem *item);
+    void removeOverlappingItem(ConnectableItem *item);
+    void checkOverlapping() override;
+
+    // Parent change
+    virtual void releaseFromParent();
+    virtual void connectToParent(BaseItem *parentItem);
+
+    qreal getOpacity();
+
+protected:
+    void readUISpecifiedProperties(const ScxmlTag *tag) override;
+    void addTransitions(const ScxmlTag *tag);
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+
+    virtual bool canStartTransition(ItemType type) const;
+    virtual void transitionCountChanged();
+    virtual void transitionsChanged();
+
+private:
+    void updateCornerPositions();
+    void createCorners();
+    void removeCorners();
+    void updateShadowClipRegion();
+
+    QVector<TransitionItem*> m_outputTransitions;
+    QVector<TransitionItem*> m_inputTransitions;
+    QVector<CornerGrabberItem*> m_corners;
+    QVector<QuickTransitionItem*> m_quickTransitions;
+    HighlightItem *m_highlighItem = nullptr;
+    TransitionItem *m_newTransition = nullptr;
+    QPen m_selectedPen;
+    QBrush m_releasedFromParentBrush;
+    int m_minimumWidth = 120;
+    int m_minimumHeight = 100;
+    bool m_releasedFromParent = false;
+    int m_releasedIndex = -1;
+    QGraphicsItem *m_releasedParent = nullptr;
+    QPointF m_newTransitionStartedPoint;
+    QPainterPath m_shadowClipPath;
+    QPointF m_moveStartPoint;
+    bool m_moveMacroStarted = false;
+    QVector<ConnectableItem*> m_overlappedItems;
+};
+
+} // namespace PluginInterface
+} // namespace ScxmlEditor