115 lines
3.2 KiB
C++
115 lines
3.2 KiB
C++
// Copyright (c) 2022 Dominic Masters
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//
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// This software is released under the MIT License.
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// https://opensource.org/licenses/MIT
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#pragma once
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#include "scene/SceneItemComponent.hpp"
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#include "display/RenderTarget.hpp"
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#include "scene/components/display/Camera.hpp"
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#include "display/shader/shaders/UIShader.hpp"
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namespace Dawn {
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class UIComponentDimensional {
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public:
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/**
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* Returns the width of this dimensional UI item.
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*
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* @return Width of this item.
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*/
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virtual float_t getWidth() = 0;
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/**
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* Returns the height of this dimensional UI item.
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*
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* @return Height of this item.
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*/
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virtual float_t getHeight() = 0;
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/**
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* Returns the content width of this dimensional UI item.
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*
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* @return Content width of this item.
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*/
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virtual float_t getContentWidth() = 0;
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/**
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* Returns the content height of this dimensional UI item.
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*
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* @return Content height of this item.
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*/
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virtual float_t getContentHeight() = 0;
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/**
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* Returns the offset of the child elements of this UI item.
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*
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* @return Offset of the child elements of this UI item.
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*/
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virtual float_t getChildOffsetX() = 0;
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/**
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* Returns the offset of the child elements of this UI item.
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*
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* @return Offset of the child elements of this UI item.
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*/
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virtual float_t getChildOffsetY() = 0;
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};
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enum UIDrawType {
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UI_DRAW_TYPE_WORLD_ABSOLUTE,
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UI_DRAW_TYPE_WORLD_CAMERA_RELATIVE,
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// UI_DRAW_TYPE_CAMERA_OVERLAY
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};
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class UICanvas : public SceneItemComponent, public UIComponentDimensional {
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private:
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std::function<void()> evtRenderResize;
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float_t w = 1;
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float_t h = 1;
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/**
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* Rebuffers all of the necessary shader buffer data for this canvas to
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* the GPU.
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*/
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void rebufferShaderParameters();
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public:
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UICanvasShaderBuffer shaderBuffer;
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/**
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* Creates a UI Canvas Scene Item Element, and attaches it to the provided
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* scene.
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*
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* @param scene Scene to create the UI Canvas for.
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* @return Created UI Canvas.
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*/
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static std::shared_ptr<UICanvas> create(Scene *scene);
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//======================================================================//
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StateProperty<std::shared_ptr<Camera>> camera;
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enum UIDrawType drawType = UI_DRAW_TYPE_WORLD_CAMERA_RELATIVE;
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/**
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* Constructs the UI Canvas Scene Item Component.
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*
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* @param item Item that this canvas item belongs to.
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*/
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UICanvas(std::weak_ptr<SceneItem> item);
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/**
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* Returns the scale of this canvas.
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*
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* @return The scale of the canvas, where 1 is default scaling.
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*/
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float_t getScale();
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float_t getWidth() override;
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float_t getHeight() override;
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float_t getContentWidth() override;
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float_t getContentHeight() override;
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float_t getChildOffsetX() override;
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float_t getChildOffsetY() override;
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void onStart() override;
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void onDispose() override;
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};
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} |