87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
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// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
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// SPDX-License-Identifier: MIT
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#pragma once
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#include <UI/UIElement.h>
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#include <UI/UITexturedQuad.h>
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#include <Renderer/Renderer.h>
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#include <Renderer/PipelineState.h>
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#include <memory>
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class Font;
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const float cActivateScreenTime = 0.2f;
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/// Manager class that manages UIElements
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class UIManager : public UIElement
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{
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public:
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/// Constructor
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UIManager(Renderer *inRenderer);
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virtual ~UIManager() override;
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/// Update elements
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virtual void Update(float inDeltaTime) override;
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/// Draw elements
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virtual void Draw() const override;
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/// Only one layer can be active, if you push a layer it will exit in the background and no longer be updated
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void PushLayer();
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void PopLayer();
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int GetNumLayers() const { return (int)mInactiveElements.size() + 1; }
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void SetDrawInactiveLayers(bool inDraw) { mDrawInactiveElements = inDraw; }
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/// Find element by ID
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virtual UIElement * FindByID(int inID) override;
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/// Listeners
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void SetListener(UIEventListener *inListener) { mListener = inListener; }
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UIEventListener * GetListener() const { return mListener; }
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/// Actions
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void SetDeactivatedAction(function<void()> inAction) { mDeactivatedAction = inAction; }
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/// Event handling (returns true if the event has been handled)
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virtual bool HandleUIEvent(EUIEvent inEvent, UIElement *inSender) override;
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/// Current state
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enum EState
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{
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STATE_INVALID,
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STATE_ACTIVATING,
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STATE_ACTIVE,
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STATE_DEACTIVATING,
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STATE_DEACTIVE
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};
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void SwitchToState(EState inState);
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EState GetState() const { return mState; }
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/// Calculate max horizontal and vertical distance of elements to edge of screen
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void GetMaxElementDistanceToScreenEdge(int &outMaxH, int &outMaxV);
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/// Access to the renderer
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Renderer * GetRenderer() { return mRenderer; }
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/// Drawing
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void DrawQuad(int inX, int inY, int inWidth, int inHeight, const UITexturedQuad &inQuad, ColorArg inColor);
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/// Draw a string in screen coordinates (assumes that the projection matrix has been set up correctly)
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void DrawText(int inX, int inY, const string_view &inText, const Font *inFont, ColorArg inColor = Color::sWhite);
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private:
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Renderer * mRenderer;
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UIEventListener * mListener;
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Array<UIElementVector> mInactiveElements;
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bool mDrawInactiveElements = true;
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unique_ptr<PipelineState> mTextured;
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unique_ptr<PipelineState> mUntextured;
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function<void()> mDeactivatedAction;
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EState mState;
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float mStateTime;
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};
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