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https://github.com/qelectrotech/qelectrotech-source-mirror.git
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ac3cf9478c
git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@2795 bfdf4180-ca20-0410-9c96-a3a8aa849046
115 lines
4.6 KiB
C++
115 lines
4.6 KiB
C++
/*
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Copyright 2006-2014 The QElectroTech Team
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This file is part of QElectroTech.
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QElectroTech is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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QElectroTech is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ELEMENTPRIMITIVEDECORATOR_H
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#define ELEMENTPRIMITIVEDECORATOR_H
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#include <QGraphicsObject>
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#include "qet.h"
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class ElementEditionCommand;
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class ElementScene;
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class CustomElementPart;
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/**
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This class represents a decorator rendered above selected items so users
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can manipulate (move, resize, ...) them.
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The implementation considers four kinds of bounding rects:
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- the actual, effective bounding rect as returned by the boundingRect() method
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- the original bounding rect, i.e. the rect containing all selected items at
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the beginning of operations (or after a command object was generated)
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- the new bounding rect, after the user moved or resized items
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- the former bounding rect, due to implementation details
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*/
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class ElementPrimitiveDecorator : public QGraphicsObject {
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Q_OBJECT
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public:
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ElementPrimitiveDecorator(QGraphicsItem * = 0);
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virtual ~ElementPrimitiveDecorator();
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enum { Type = UserType + 2200 };
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// methods
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QRectF internalBoundingRect() const;
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virtual QRectF boundingRect () const;
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virtual void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget * = 0);
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virtual int type() const { return Type; }
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void setItems(const QList<QGraphicsItem *> &);
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void setItems(const QList<CustomElementPart *> &);
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QList<CustomElementPart *> items() const;
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QList<QGraphicsItem *> graphicsItems() const;
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public slots:
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void adjust();
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signals:
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void actionFinished(ElementEditionCommand *);
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protected:
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void hoverMoveEvent(QGraphicsSceneHoverEvent *);
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void mousePressEvent(QGraphicsSceneMouseEvent *);
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void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *);
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void mouseMoveEvent(QGraphicsSceneMouseEvent *);
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void mouseReleaseEvent(QGraphicsSceneMouseEvent *);
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void keyPressEvent(QKeyEvent *);
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void keyReleaseEvent(QKeyEvent *);
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QPointF deltaForRoundScaling(const QRectF &, const QRectF &, qreal);
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QPointF snapConstPointToGrid(const QPointF &) const;
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void snapPointToGrid(QPointF &) const;
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bool mustSnapToGrid(QGraphicsSceneMouseEvent *);
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QET::ScalingMethod scalingMethod(QGraphicsSceneMouseEvent *);
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private:
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void init();
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void saveOriginalBoundingRect();
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void adjustEffectiveBoundingRect();
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void startMovement();
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void applyMovementToRect(int, const QPointF &, QRectF &);
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CustomElementPart *singleItem() const;
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void translateItems(const QPointF &);
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void scaleItems(const QRectF &, const QRectF &);
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QRectF getSceneBoundingRect(QGraphicsItem *) const;
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void drawSquares(QPainter *, const QStyleOptionGraphicsItem *, QWidget *);
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void drawResizeSquare(QPainter *, const QStyleOptionGraphicsItem *, QWidget *, const QRectF &);
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void drawGenericSquare(QPainter *, const QStyleOptionGraphicsItem *, QWidget *, const QRectF &, const QColor &, const QColor &);
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QList<QRectF> getResizingSquares();
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QRectF getGenericSquare(const QPointF &);
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int resizingSquareAtPos(const QPointF &);
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// attributes
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private:
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QList<CustomElementPart *> decorated_items_;
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QRectF effective_bounding_rect_; ///< actual, effective bounding rect -- never shrinks
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QRectF original_bounding_rect_; ///< original bounding rect
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QRectF modified_bounding_rect_; ///< new bounding rect, after the user moved or resized items
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/**
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Index of the square leading the current operation (resizing, etc.) or -1 if no
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operation is occurring, -2 for a move operation.
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*/
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int current_operation_square_;
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int grid_step_x_; ///< Grid horizontal step
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int grid_step_y_; ///< Grid horizontal step
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QPointF first_pos_; ///< First point involved within the current resizing operation
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QPointF latest_pos_; ///< Latest point involved within the current resizing operation
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QPointF mouse_offset_; ///< Offset between the mouse position and the point to be snapped to grid when moving selection
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bool moving_by_keys_; ///< Whether we are currently moving our decorated items using the arrow keys
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QPointF keys_movement_; ///< Movement applied to our decorated items using the arrow keys
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};
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#endif
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