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Signature plugin: Element manipulation

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This commit is contained in:
Jakub Melka
2022-03-05 19:24:35 +01:00
parent fe84cdb3f2
commit 8a83d7ae85
3 changed files with 555 additions and 19 deletions
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99
Pdf4QtLib/sources/pdfpagecontentelements.h
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@@ -31,10 +31,11 @@ class QSvgRenderer;
namespace pdf
{
class PDFWidget;
class PDFPageContentScene;
class PDF4QTLIBSHARED_EXPORT PDFPageContentElement
{
{
public:
explicit PDFPageContentElement() = default;
virtual ~PDFPageContentElement() = default;
@@ -48,6 +49,19 @@ public:
const QMatrix& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const = 0;
/// Returns manipulation mode. If manipulation mode is zero, then element
/// cannot be manipulated. If it is nonzero, then element can be manipulated
/// in some way.
/// \param point Point on page
/// \param snapPointDistanceTreshold Snap point threshold
virtual uint getManipulationMode(const QPointF& point, PDFReal snapPointDistanceThreshold) const = 0;
/// Performs manipulation of given mode. Mode must be the one returned
/// from function getManipulationMode. \sa getManipulationMode
/// \param mode Mode
/// \param offset Offset
virtual void performManipulation(uint mode, const QPointF& offset) = 0;
PDFInteger getPageIndex() const;
void setPageIndex(PDFInteger newPageIndex);
@@ -55,6 +69,31 @@ public:
void setElementId(PDFInteger newElementId);
protected:
enum ManipulationModes : uint
{
None = 0,
Translate,
Top,
Left,
Right,
Bottom,
TopLeft,
TopRight,
BottomLeft,
BottomRight,
Pt1,
Pt2
};
uint getRectangleManipulationMode(const QRectF& rectangle,
const QPointF& point,
PDFReal snapPointDistanceThreshold) const;
void performRectangleManipulation(QRectF& rectangle,
uint mode,
const QPointF& offset);
PDFInteger m_elementId = -1;
PDFInteger m_pageIndex = -1;
};
@@ -96,6 +135,11 @@ public:
const QMatrix& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const override;
virtual uint getManipulationMode(const QPointF& point,
PDFReal snapPointDistanceThreshold) const override;
virtual void performManipulation(uint mode, const QPointF& offset) override;
private:
bool m_rounded = false;
QRectF m_rectangle;
@@ -122,6 +166,11 @@ public:
const QMatrix& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const override;
virtual uint getManipulationMode(const QPointF& point,
PDFReal snapPointDistanceThreshold) const override;
virtual void performManipulation(uint mode, const QPointF& offset) override;
LineGeometry getGeometry() const;
void setGeometry(LineGeometry newGeometry);
@@ -147,6 +196,11 @@ public:
const QMatrix& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const override;
virtual uint getManipulationMode(const QPointF& point,
PDFReal snapPointDistanceThreshold) const override;
virtual void performManipulation(uint mode, const QPointF& offset) override;
QPointF getPoint() const;
void setPoint(QPointF newPoint);
@@ -169,6 +223,11 @@ public:
const QMatrix& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const override;
virtual uint getManipulationMode(const QPointF& point,
PDFReal snapPointDistanceThreshold) const override;
virtual void performManipulation(uint mode, const QPointF& offset) override;
QPainterPath getCurve() const;
void setCurve(QPainterPath newCurve);
@@ -196,6 +255,11 @@ public:
const QMatrix& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const override;
virtual uint getManipulationMode(const QPointF& point,
PDFReal snapPointDistanceThreshold) const override;
virtual void performManipulation(uint mode, const QPointF& offset) override;
const QByteArray& getContent() const;
void setContent(const QByteArray& newContent);
@@ -245,22 +309,38 @@ public:
void deselect(const std::set<PDFInteger>& ids);
void deselectAll();
bool isManipulationAllowed(PDFInteger pageIndex) const;
bool isManipulationInProgress() const { return m_isManipulationInProgress; }
void manipulateDeleteSelection();
void startManipulation(PDFInteger pageIndex,
const QPointF& startPoint,
const QPointF& currentPoint,
PDFReal snapPointDistanceThreshold);
void updateManipulation(PDFInteger pageIndex,
const QPointF& startPoint,
const QPointF& currentPoint);
void finishManipulation(PDFInteger pageIndex,
const QPointF& startPoint,
const QPointF& currentPoint,
bool createCopy);
void cancelManipulation();
signals:
void selectionChanged();
void stateChanged();
private:
void stopManipulation();
PDFPageContentScene* m_scene;
std::set<PDFInteger> m_selection;
bool m_isManipulationInProgress;
std::vector<std::unique_ptr<PDFPageContentElement>> m_manipulatedElements;
std::map<PDFInteger, uint> m_manipulationModes;
QPointF m_lastUpdatedPoint;
};
class PDF4QTLIBSHARED_EXPORT PDFPageContentScene : public QObject,
@@ -278,6 +358,11 @@ public:
/// \param element Element
void addElement(PDFPageContentElement* element);
/// Replaces element in the page content scene, scene
/// takes ownership over the element.
/// \param element Element
void replaceElement(PDFPageContentElement* element);
/// Returns element by its id (identifier number)
/// \param id Element id
PDFPageContentElement* getElementById(PDFInteger id) const;
@@ -317,6 +402,9 @@ public:
PDFTextLayoutGetter& layoutGetter,
const QMatrix& pagePointToDevicePointMatrix,
QList<PDFRenderError>& errors) const override;
PDFWidget* widget() const;
void setWidget(PDFWidget* newWidget);
signals:
/// This signal is emitted when scene has changed (including graphics)
void sceneChanged();
@@ -329,6 +417,8 @@ private:
QPoint widgetMouseStartPos;
QPoint widgetMouseCurrentPos;
QElapsedTimer timer;
PDFInteger pageIndex = -1;
QPointF pagePos;
bool isValid() const { return !hoveredElementIds.empty(); }
};
@@ -343,6 +433,8 @@ private:
bool isMouseGrabbed() const { return mouseGrabNesting > 0; }
};
PDFReal getSnapPointDistanceThreshold() const;
bool isMouseGrabbed() const { return m_mouseGrabInfo.isMouseGrabbed(); }
/// Grabs mouse input, if mouse is already grabbed, or if event
@@ -358,6 +450,7 @@ private:
PDFInteger m_firstFreeId;
bool m_isActive;
PDFWidget* m_widget;
std::vector<std::unique_ptr<PDFPageContentElement>> m_elements;
std::optional<QCursor> m_cursor;
PDFPageContentElementManipulator m_manipulator;