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76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project.
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* For complete copyright and license terms please see the LICENSE at the root of this distribution.
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#pragma once
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#include <QGraphicsItem>
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#include <QGraphicsLayoutItem>
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#include <GraphCanvas/Components/VisualBus.h>
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#include <GraphCanvas/Styling/StyleHelper.h>
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namespace GraphCanvas
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{
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//! Generates Ebus notifications for QGraphicsItem event.
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//! Requires that the derived class has a GetEntityId() function
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class SlotLayoutItem
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: public QGraphicsItem
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, public QGraphicsLayoutItem
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{
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public:
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AZ_RTTI(SlotLayoutItem, "{ED76860E-35B8-4FEE-A2A0-04B467F778B6}", QGraphicsLayoutItem, QGraphicsItem);
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AZ_CLASS_ALLOCATOR(SlotLayoutItem, AZ::SystemAllocator, 0);
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SlotLayoutItem()
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{
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setGraphicsItem(this);
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setAcceptHoverEvents(true);
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setOwnedByLayout(false);
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}
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virtual ~SlotLayoutItem() = default;
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const Styling::StyleHelper& GetStyle() const { return m_style; }
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protected:
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// QGraphicsItem
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void mousePressEvent(QGraphicsSceneMouseEvent* event) override
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{
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bool result = false;
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VisualNotificationBus::EventResult(result, GetEntityId(), &VisualNotifications::OnMousePress, GetEntityId(), event);
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if (!result)
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{
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QGraphicsItem::mousePressEvent(event);
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}
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}
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void mouseReleaseEvent(QGraphicsSceneMouseEvent* event) override
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{
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bool result = false;
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VisualNotificationBus::EventResult(result, GetEntityId(), &VisualNotifications::OnMouseRelease, GetEntityId(), event);
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if (!result)
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{
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QGraphicsItem::mouseReleaseEvent(event);
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}
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}
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QVariant itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant& value) override
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{
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if (GetEntityId().IsValid())
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{
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VisualNotificationBus::Event(GetEntityId(), &VisualNotifications::OnItemChange, GetEntityId(), change, value);
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}
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return QGraphicsItem::itemChange(change, value);
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}
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virtual void RefreshStyle() { };
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virtual AZ::EntityId GetEntityId() const = 0;
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Styling::StyleHelper m_style;
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};
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}
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