Viewport2d.h

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#pragma once
 
#include "EditorState.h"
#include "Nodes/Widgets/PolyRect.h"
#include "TransformSnap.h"
 
 
struct VpWidgetTransform
{
    glm::vec2 mOffset;
    glm::vec2 mSize;
    float mRotation;
};
 
enum class WidgetControlMode
{
    Default,
    Translate,
    Rotate,
    Scale,
    Pan
};
 
enum class WidgetAxisLock
{
    None,
    AxisX,
    AxisY,
 
    Count
};
 
class Viewport2D
{
public:
 
    Viewport2D();
    ~Viewport2D();
 
    void Update(float deltaTime);
    bool ShouldHandleInput() const;
    bool IsMouseInside() const;
    void HandleInput();
 
    void SetWidgetControlMode(WidgetControlMode newMode);
    WidgetControlMode GetWidgetControlMode() const { return mControlMode; }
 
    Widget* GetWrapperWidget();
    Widget* GetHoveredWidget();
 
    void ResetViewport();
 
    float GetZoom() const { return mZoom; }
    glm::vec2 GetRootOffset() const { return mRootOffset; }
 
protected:
 
    void HandleDefaultControls();
    void HandleTransformControls();
    void HandlePanControls();
 
    glm::vec2 HandleLockedCursor();
    void HandleAxisLocking();
 
    void SavePreTransforms();
    void RestorePreTransforms();
 
    Widget* FindHoveredWidget(Node* node, uint32_t& maxDepth, int32_t mouseX, int32_t mouseY, uint32_t depth = 0);
 
    float mZoom = 1.0f;
    glm::vec2 mRootOffset = { 0.0f, 0.0f };
    WidgetControlMode mControlMode = WidgetControlMode::Default;
    WidgetAxisLock mAxisLock = WidgetAxisLock::None;
 
    SharedPtr<Widget> mWrapperWidget;
    WeakPtr<Widget> mHoveredWidget;
 
    int32_t mPrevMouseX = 0;
    int32_t mPrevMouseY = 0;
 
    std::vector<VpWidgetTransform> mSavedTransforms;
    TransformSnapAccum mSnapAccum;
};