TransformAnimationWidget.h

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#pragma once
 
#include "Nodes/Node.h"
#include "AssetRef.h"
#include "Timeline/TimelineTypes.h"
 
#include <vector>
 
class TransformAnimationAsset;
class Widget;
 
class TransformAnimationWidget : public Node
{
public:
 
    DECLARE_NODE(TransformAnimationWidget, Node);
 
    TransformAnimationWidget();
    virtual ~TransformAnimationWidget();
 
    virtual void Create() override;
    virtual void Destroy() override;
    virtual void Tick(float deltaTime) override;
    virtual void EditorTick(float deltaTime) override;
    virtual void Start() override;
    virtual void Stop() override;
 
    virtual void GatherProperties(std::vector<Property>& outProps) override;
    virtual const char* GetTypeName() const override;
 
    void Play();
    void Play(TransformAnimationAsset* asset);
    void Pause();
    void StopPlayback();
 
    void SetAnimation(TransformAnimationAsset* asset);
    TransformAnimationAsset* GetAnimation() const;
 
    void SetKeyframes(const std::vector<TransformKeyframe>& keyframes);
    const std::vector<TransformKeyframe>& GetInlineKeyframes() const { return mInlineKeyframes; }
 
    void  SetTime(float time);
    float GetTime() const { return mCurrentTime; }
    float GetDuration() const;
    float GetProgress() const;
 
    bool IsPlaying() const { return mPlaying; }
    bool IsPaused() const { return mPaused; }
 
    void SetLoop(bool loop) { mLoop = loop; }
    bool IsLooping() const { return mLoop; }
 
    void SetPlayRate(float rate) { mPlayRate = rate; }
    float GetPlayRate() const { return mPlayRate; }
 
    void SetPlayOnStart(bool play) { mPlayOnStart = play; }
    bool GetPlayOnStart() const { return mPlayOnStart; }
 
    void SetTargetWidget(Widget* target);
    Widget* GetTargetWidget() const;
 
    void ApplyKeyframe(const TransformKeyframe& kf);
    TransformKeyframe SampleNow() const;
 
    // Authoring helpers — seed a TransformKeyframe from the target Widget's
    // current 2D transform (Z=0, X/Y rotation = 0) and append it to either
    // the bound asset or the inline keyframes vector.
    void AddKeyframeFromTarget();
    void AddInlineKeyframeFromTarget();
 
#if EDITOR
    virtual bool DrawCustomProperty(Property& prop) override;
#endif
 
protected:
 
    TransformKeyframe MakeKeyframeFromTarget() const;
 
 
    void EvaluateAtTime(float time);
    TransformKeyframe SampleSource(float time) const;
    const std::vector<TransformKeyframe>* GetActiveKeyframes() const;
    float GetActiveDuration() const;
 
    TransformAnimationRef mAnimation;
    std::vector<TransformKeyframe> mInlineKeyframes;
 
    WeakPtr<Node> mTarget;
 
    float mCurrentTime = 0.0f;
    float mPlayRate = 1.0f;
    bool  mPlaying = false;
    bool  mPaused = false;
    bool  mLoop = false;
    bool  mPlayOnStart = false;
 
    int32_t mLastFiredKeyframe = -1;
 
#if EDITOR
    void StartPreview();
    void StopPreview();
 
    bool      mEditorPreviewing = false;
    bool      mEditorPreviewSnapshotValid = false;
    glm::vec2 mEditorPreviewSavedPos = glm::vec2(0.0f);
    float     mEditorPreviewSavedRot = 0.0f;
    glm::vec2 mEditorPreviewSavedScale = glm::vec2(1.0f);
#endif
};