urho3d/Source/Urho3D/UI/UIComponent.h

//
// Copyright (c) 2008-2017 the Urho3D project.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#pragma once

#include "../Scene/Component.h"

namespace Urho3D
{

class Material;
class Texture2D;
class StaticModel;
class Viewport;
class UIElement;
class UIBatch;
class VertexBuffer;

class URHO3D_API UIComponent : public Component
{
    URHO3D_OBJECT(UIComponent, Component);

public:
    /// Construct.
    UIComponent(Context* context);
    /// Destruct.
    virtual ~UIComponent() override;
    /// Register object factory.
    static void RegisterObject(Context* context);

    /// Return UIElement.
    UIElement* GetRoot() const;
    /// Return material which will be used for rendering UI texture.
    Material* GetMaterial() const;
    /// Return texture which will be used for rendering UI to.
    Texture2D* GetTexture() const;

protected:
    /// Material that is set to the model.
    SharedPtr<Material> material_;
    /// Texture that UIElement will be rendered into.
    SharedPtr<Texture2D> texture_;
    /// Model that texture will be applied to.
    SharedPtr<StaticModel> model_;
    /// UIElement to be rendered into texture.
    SharedPtr<UIElement> rootElement_;
    /// UI rendering batches.
    PODVector<UIBatch> batches_;
    /// UI rendering vertex data.
    PODVector<float> vertexData_;
    /// UI vertex buffer.
    SharedPtr<VertexBuffer> vertexBuffer_;
    /// UI rendering batches for debug draw.
    PODVector<UIBatch> debugDrawBatches_;
    /// UI rendering vertex data for debug draw.
    PODVector<float> debugVertexData_;
    /// UI debug geometry vertex buffer.
    SharedPtr<VertexBuffer> debugVertexBuffer_;
    /// Is StaticModel component created by this component.
    bool isStaticModelOwned_;

    virtual void OnNodeSet(Node* node) override;
    /// Handle resizing of element. Setting size of element will automatically resize texture. UIElement size matches size of texture.
    void OnElementResized(StringHash eventType, VariantMap& args);
    /// Convert screen position to position on UIElement.
    bool ScreenToUIPosition(IntVector2 screenPos, IntVector2& result);

    friend class UI;
};

}