viewmanager.h

/*
 
Pencil2D - Traditional Animation Software
Copyright (C) 2005-2007 Patrick Corrieri & Pascal Naidon
Copyright (C) 2012-2020 Matthew Chiawen Chang
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2 of the License.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
*/
 
#ifndef VIEWMANAGER_H
#define VIEWMANAGER_H
 
#include <QTransform>
#include "basemanager.h"
 
 
class ViewManager : public BaseManager
{
    Q_OBJECT
 
public:
    explicit ViewManager(Editor* editor);
    ~ViewManager() override;
 
    bool init() override;
    Status load(Object*) override;
    Status save(Object*) override;
 
    QTransform getView() const;
    QTransform getViewInverse() const;
 
    qreal getScaleInversed() const;
 
    void resetView();
 
    QPointF mapCanvasToScreen(QPointF p) const;
    QPointF mapScreenToCanvas(QPointF p) const;
 
    QRectF mapCanvasToScreen(const QRectF& rect) const;
    QRectF mapScreenToCanvas(const QRectF& rect) const;
 
    QPolygonF mapPolygonToScreen(const QPolygonF& polygon) const;
    QPolygonF mapPolygonToCanvas(const QPolygonF& polygon) const;
 
    QPainterPath mapCanvasToScreen(const QPainterPath& path) const;
    QPainterPath mapScreenToCanvas(const QPainterPath& path) const;
 
    QPointF translation() const;
    void translate(float dx, float dy);
    void translate(QPointF offset);
    void centerView();
 
    float rotation();
    void rotate(float degree);
    void rotateRelative(float delta);
    void resetRotation();
 
    qreal scaling();
    void scale(qreal scaleValue);
    void scaleAtOffset(qreal scaleValue, QPointF offset);
    void scaleUp();
    void scaleDown();
    void scale400();
    void scale300();
    void scale200();
    void scale100();
    void scale50();
    void scale33();
    void scale25();
 
    void flipHorizontal(bool b);
    void flipVertical(bool b);
 
    bool isFlipHorizontal() const { return mIsFlipHorizontal; }
    bool isFlipVertical() const { return mIsFlipVertical; }
    void setCanvasSize(QSize size);
 
    void forceUpdateViewTransform();
 
signals:
    void viewChanged();
    void viewFlipped();
 
private:
    void updateViewTransforms();
    void onCurrentFrameChanged();
 
    QTransform mView;
    QTransform mViewInverse;
    QTransform mViewCanvas;
    QTransform mViewCanvasInverse;
    QTransform mCentre;
 
    QPointF mTranslation = QPointF();
    qreal mScaling = 1.0;
    qreal mRotation = 0.0;
 
    QSize mCanvasSize = { 1, 1 };
 
    bool mIsFlipHorizontal = false;
    bool mIsFlipVertical = false;
};
 
#endif // VIEWMANAGER_H