alexpete
91 lines
3.3 KiB
C++
91 lines
3.3 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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#pragma once
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#include <AzCore/Component/Component.h>
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#include <functional>
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#include <GraphCanvas/Components/StyleBus.h>
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#include <GraphCanvas/Styling/Selector.h>
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namespace GraphCanvas
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{
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namespace Styling
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{
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//! Requests that enable virtual styled entities to be created from other styled entities.
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class PseudoElementFactoryRequests : public AZ::EBusTraits
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{
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public:
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//! Creates a standalone style element
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virtual AZ::EntityId CreateStyleEntity(const AZStd::string& style) const = 0;
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//! Create a fake "child element" of a styled entity.
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//! For example, you might have a node, and want to add a "help" element (i.e. "node > help").
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virtual AZ::EntityId CreateVirtualChild(const AZ::EntityId&, const AZStd::string&) const = 0;
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};
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using PseudoElementFactoryRequestBus = AZ::EBus<PseudoElementFactoryRequests>;
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//! A virtual entity that appears to be hierarchically nested below the real styled entity.
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//! For example, you might have a node, and want to add a "help" element (i.e. "node > help").
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//!
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//! Note that the virtual element has the same set of selectors as its parent (with the exception of the
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//! "element" selector), so it will track the parent's state.
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class VirtualChildElement
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: public AZ::Component
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, protected StyledEntityRequestBus::Handler
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{
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public:
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AZ_COMPONENT(VirtualChildElement, "{42C2CC3B-CEEC-434C-916E-3ACED53F7751}");
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static void Reflect(AZ::ReflectContext* context);
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static AZ::EntityId Create(const AZ::EntityId& real, const AZStd::string& virtualChildElement);
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VirtualChildElement();
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virtual ~VirtualChildElement() = default;
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protected:
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VirtualChildElement(const AZ::EntityId& real, const AZStd::string& virtualChildElement);
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VirtualChildElement& operator=(const VirtualChildElement&) = delete;
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// StyledEntityRequestBus::Handler
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AZ::EntityId GetStyleParent() const override;
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SelectorVector GetStyleSelectors() const override;
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void AddSelectorState(const char* selector) override;
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void RemoveSelectorState(const char* selector) override;
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AZStd::string GetElement() const override;
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AZStd::string GetClass() const override;
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////
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// AZ::Component
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void Activate() override;
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void Deactivate() override;
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////
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AZ::EntityId m_real;
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Selector m_parentSelector;
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AZStd::string m_virtualChild;
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Selector m_virtualChildSelector;
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AZStd::unordered_map<AZ::Crc32, Styling::Selector> m_dynamicSelectors;
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};
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} // namespace Styling
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} // namespace GraphCanvas
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