File indexing completed on 2024-05-19 15:02:12

 /***************************************************************************
     File                 : TextLabelPrivate.h
     Project              : LabPlot
     Description          : Private members of TextLabel
     --------------------------------------------------------------------
     Copyright            : (C) 2012-2014 by Alexander Semke (alexander.semke@web.de)
     Copyright            : (C) 2019 by Stefan Gerlach (stefan.gerlach@uni.kn)
 
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *  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; either version 2 of the License, or      *
  *  (at your option) any later version.                                    *
  *                                                                         *
  *  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.                           *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program; if not, write to the Free Software           *
  *   Foundation, Inc., 51 Franklin Street, Fifth Floor,                    *
  *   Boston, MA  02110-1301  USA                                           *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef TEXTLABELPRIVATE_H
 #define TEXTLABELPRIVATE_H
 
 #include <QStaticText>
 #include <QFutureWatcher>
 #include <QGraphicsItem>
 #include <QDesktopWidget>
 
 class QGraphicsSceneHoverEvent;
 
 class TextLabelPrivate: public QGraphicsItem {
 public:
     explicit TextLabelPrivate(TextLabel*);
 
     qreal rotationAngle{0.0};
     //scaling:
     //we need to scale from the font size specified in points to scene units.
     //furhermore, we create the tex-image in a higher resolution then usual desktop resolution
     // -> take this into account
     double scaleFactor{Worksheet::convertToSceneUnits(1, Worksheet::Unit::Point)};
     int teXImageResolution{QApplication::desktop()->physicalDpiX()};
     //TODO: use constant for 2.54
     double teXImageScaleFactor{Worksheet::convertToSceneUnits(2.54/QApplication::desktop()->physicalDpiX(), Worksheet::Unit::Centimeter)};
 
     TextLabel::TextWrapper textWrapper;
     QFont teXFont{"Computer Modern", 42};
     QColor fontColor{Qt::black}; // used only by the theme for unformatted text. The text font is in the HTML and so this variable is never set
     QColor backgroundColor{Qt::white}; // used only by the theme for unformatted text. The text font is in the HTML and so this variable is never set
     QImage teXImage;
     QFutureWatcher<QImage> teXImageFutureWatcher;
     bool teXRenderSuccessful{false};
 
     // see TextLabel::init() for type specific default settings
     // position in parent's coordinate system, the label gets aligned around this point
     WorksheetElement::PositionWrapper position{
         QPoint(Worksheet::convertToSceneUnits(1, Worksheet::Unit::Centimeter), Worksheet::convertToSceneUnits(1, Worksheet::Unit::Centimeter)),
         TextLabel::HorizontalPosition::Center, TextLabel::VerticalPosition::Center};
     bool positionInvalid{false};
 
     WorksheetElement::HorizontalAlignment horizontalAlignment{WorksheetElement::HorizontalAlignment::Center};
     WorksheetElement::VerticalAlignment verticalAlignment{WorksheetElement::VerticalAlignment::Center};
 
     TextLabel::BorderShape borderShape{TextLabel::BorderShape::NoBorder};
     QPen borderPen{Qt::black, Worksheet::convertToSceneUnits(1.0, Worksheet::Unit::Point), Qt::SolidLine};
     qreal borderOpacity{1.0};
 
     QString name() const;
     void retransform();
     bool swapVisible(bool on);
     virtual void recalcShapeAndBoundingRect();
     void updatePosition();
     QPointF positionFromItemPosition(QPointF);
     void updateText();
     void updateTeXImage();
     void updateBorder();
     QStaticText staticText;
 
     bool suppressItemChangeEvent{false};
     bool suppressRetransform{false};
     bool m_printing{false};
     bool m_hovered{false};
 
     QRectF boundingRectangle; //bounding rectangle of the text
     QRectF transformedBoundingRectangle; //bounding rectangle of transformed (rotated etc.) text
     QPainterPath borderShapePath;
     QPainterPath labelShape;
 
     //reimplemented from QGraphicsItem
     QRectF boundingRect() const override;
     QPainterPath shape() const override;
     void paint(QPainter*, const QStyleOptionGraphicsItem*, QWidget* widget = nullptr) override;
     QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
 
     TextLabel* const q;
 
 private:
     void contextMenuEvent(QGraphicsSceneContextMenuEvent*) override;
     void mouseReleaseEvent(QGraphicsSceneMouseEvent*) override;
     void keyPressEvent(QKeyEvent*) override;
     void hoverEnterEvent(QGraphicsSceneHoverEvent*) override;
     void hoverLeaveEvent(QGraphicsSceneHoverEvent*) override;
 };
 
 #endif