rs_entity.cpp

qcad2.05可用于windows和linux的源码

/****************************************************************************
** $Id: rs_entity.cpp 1945 2004-12-21 03:44:04Z andrew $
**
** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
**
** This file is part of the qcadlib Library project.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid qcadlib Professional Edition licenses may use 
** this file in accordance with the qcadlib Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.ribbonsoft.com for further details.
**
** Contact [e-mail] if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/


#include "rs_entity.h"

#include <iostream>

#include "rs_arc.h"
#include "rs_circle.h"
#include "rs_debug.h"
#include "rs_document.h"
#include "rs_ellipse.h"
#include "rs_graphic.h"
#include "rs_graphicview.h"
#include "rs_insert.h"
#include "rs_layer.h"
#include "rs_line.h"
#include "rs_painter.h"
#include "rs_point.h"
#include "rs_polyline.h"
#include "rs_text.h"
#include "rs_stringlist.h"


/**
 * Default constructor.
 * @param parent The parent entity of this entity.
 *               E.g. a line might have a graphic entity or
 *               a polyline entity as parent.
 */
RS_Entity::RS_Entity(RS_EntityContainer* parent) {

    this->parent = parent;
    init();
}


/**
 * Copy constructor.
 */
/*RS_Entity::RS_Entity(const RS_Entity& e) : RS_Flags(e.getFlags()) {
	cout << "copy constructor called\n";
	init();
	parent = e.parent;
	layer = e.layer;
	//setFlag(e.getFlags());
    minV = e.minV;
    maxV = e.maxV;
    pen = e.pen;
}*/



/**
 * Destructor.
 */
RS_Entity::~RS_Entity() {}



/**
 * Initialisation. Called from all constructors.
 */
void RS_Entity::init() {
    resetBorders();

    setFlag(RS2::FlagVisible);
    //layer = NULL;
    //pen = RS_Pen();
	updateEnabled = true;
    setLayerToActive();
    setPenToActive();
    initId();
}

/**
 * Gives this entity a new unique id.
 */
void RS_Entity::initId() {
    static unsigned long int idCounter=0;
    id = idCounter++;
}

/**
 * Resets the borders of this element. 
 */
void RS_Entity::resetBorders() {
    // TODO: Check that. windoze XP crashes with MAXDOUBLE
    double maxd = RS_MAXDOUBLE;
    double mind = RS_MINDOUBLE;

    minV.set(maxd, maxd, maxd);
    maxV.set(mind, mind, mind);
}



/**
 * Selects or deselects this entity.
 *
 * @param select True to select, false to deselect.
 */
bool RS_Entity::setSelected(bool select) {
    // layer is locked:
    if (select && isLocked()) {
        return false;
    }

    if (select) {
        setFlag(RS2::FlagSelected);
    } else {
        delFlag(RS2::FlagSelected);
    }

    return true;
}



/**
 * Toggles select on this entity.
 */
bool RS_Entity::toggleSelected() {
    return setSelected(!isSelected());
    //toggleFlag(RS2::FlagSelected);
}



/**
 * @return True if the entity is selected. Note that an entity might
 * not be selected but one of its parents is selected. In that case
 * this function returns false.
 */
bool RS_Entity::isSelected() const {
    return getFlag(RS2::FlagSelected);
}



/**
 * @return true if a parent entity of this entity is selected.
 */
bool RS_Entity::isParentSelected() {
    RS_Entity* p = this;

    do {
        p = p->getParent();
        if (p!=NULL && p->isSelected()==true) {
            return true;
        }
    } while(p!=NULL);

    return false;
}



/**
 * Sets or resets the processed flag of this entity.
 *
 * @param on True to set, false to reset.
 */
void RS_Entity::setProcessed(bool on) {
    if (on) {
        setFlag(RS2::FlagProcessed);
    } else {
        delFlag(RS2::FlagProcessed);
    }
}



/**
 * @return True if the processed flag is set. 
 */
bool RS_Entity::isProcessed() const {
    return getFlag(RS2::FlagProcessed);
}



/**
 * Called when the undo state changed.
 *
 * @param undone true: entity has become invisible.
 *               false: entity has become visible.
 */
void RS_Entity::undoStateChanged(bool /*undone*/) {
	setSelected(false);
    update();
}


/**
 * @return true if this entity or any parent entities are undone.
 */
bool RS_Entity::isUndone() const {
	if (parent==NULL) {
		return RS_Undoable::isUndone();
	}
	else {
		return RS_Undoable::isUndone() || parent->isUndone();
	}
}


/**
 * @return True if the entity is in the given range.
 */
bool RS_Entity::isInWindow(RS_Vector v1, RS_Vector v2) {
    double right, left, top, bottom;

    right = std::max(v1.x, v2.x);
    left = std::min(v1.x, v2.x);
    top = std::max(v1.y, v2.y);
    bottom = std::min(v1.y, v2.y);

    return (getMin().x>=left &&
            getMax().x<=right &&
            getMin().y>=bottom &&
            getMax().y<=top);
}


/**
 * @param tolerance Tolerance.
 *
 * @retval true if the given point is on this entity.
 * @retval false otherwise
 */
bool RS_Entity::isPointOnEntity(const RS_Vector& coord,
                                double tolerance) {
    double dist = getDistanceToPoint(coord, NULL, RS2::ResolveNone);
    return (dist<=tolerance);
}


/**
 * Is this entity visible?
 *
 * @return true Only if the entity and the layer it is on are visible.
 * The Layer might also be NULL. In that case the layer visiblity 
* is ignored.
 */
bool RS_Entity::isVisible() {

    if (!getFlag(RS2::FlagVisible)) {
        return false;
    }

    if (isUndone()) {
        return false;
    }

	/*RS_EntityCotnainer* parent = getParent();
	if (parent!=NULL && parent->isUndone()) {
		return false;
	}*/

    if (getLayer()==NULL) {
        return true;
    }

    // inserts are usually visible - the entities in them have their own
    //   layers which might be frozen
    // upd: i'm not sure if that is the best behaviour
    //if (rtti()==RS2::EntityInsert) {
    //	return true;
    //}

    if (layer!=NULL /*&& layer->getName()!="ByBlock"*/) {
        if (!layer->isFrozen()) {
            return true;
        } else {
            return false;
        }
    }

    if (layer==NULL /*&& getLayer()->getName()!="ByBlock"*/) {
        if (getLayer()==NULL) {
            return true;
        } else {
            if (!getLayer()->isFrozen()) {
                return true;
            } else {
                return false;
            }
        }
    }

    if (getBlockOrInsert()==NULL) {
        return true;
    }

    if (getBlockOrInsert()->rtti()==RS2::EntityBlock) {
        if (getLayer(false)==NULL || !getLayer(false)->isFrozen()) {
            return true;
        } else {
            return false;
        }
    }


    if (getBlockOrInsert()->getLayer()==NULL) {
        return true;
    }

    if(!getBlockOrInsert()->getLayer()->isFrozen()) {
        return true;
    }

    return false;
}



/**
 * Sets the highlight status of the entity. Highlighted entities 
 * usually indicate a feedback to a user action.
 */
void RS_Entity::setHighlighted(bool on) {
    if (on) {
        setFlag(RS2::FlagHighlighted);
    } else {
        delFlag(RS2::FlagHighlighted);
    }
}



/**
 * @return true if the entity is highlighted.
 */
bool RS_Entity::isHighlighted() {
    return getFlag(RS2::FlagHighlighted);
}



/**
 * @return true if the layer this entity is on is locked.
 */
bool RS_Entity::isLocked() {
    if (getLayer(true)!=NULL && getLayer()->isLocked()) {
        return true;
    } else {
        return false;
    }
}


/**
 * @return The parent graphic in which this entity is stored
 * or the parent's parent graphic or NULL if none of the parents
 * are stored in a graphic.
 */
RS_Graphic* RS_Entity::getGraphic() {
    if (rtti()==RS2::EntityGraphic) {
        return (RS_Graphic*)this;
    } else if (parent==NULL) {
        return NULL;
    } else {
        return parent->getGraphic();
    }
}



/**
 * @return The parent block in which this entity is stored
 * or the parent's parent block or NULL if none of the parents
 * are stored in a block.
 */
RS_Block* RS_Entity::getBlock() {
    if (rtti()==RS2::EntityBlock) {
        return (RS_Block*)this;
    } else if (parent==NULL) {
        return NULL;
    } else {
        return parent->getBlock();
    }
}



/**
 * @return The parent insert in which this entity is stored
 * or the parent's parent block or NULL if none of the parents
 * are stored in a block.
 */
RS_Insert* RS_Entity::getInsert() {
    if (rtti()==RS2::EntityInsert) {
        return (RS_Insert*)this;
    } else if (parent==NULL) {
        return NULL;
    } else {
        return parent->getInsert();
    }
}



/**
 * @return The parent block or insert in which this entity is stored
 * or the parent's parent block or insert or NULL if none of the parents
 * are stored in a block or insert.
 */
RS_Entity* RS_Entity::getBlockOrInsert() {
    if (rtti()==RS2::EntityBlock || rtti()==RS2::EntityInsert) {
        return this;
    } else if (parent==NULL) {
        return NULL;
    } else {
        return parent->getBlockOrInsert();
    }
}



/**
 * @return The parent document in which this entity is stored
 * or the parent's parent document or NULL if none of the parents
 * are stored in a document. Note that a document is usually 
 * either a Graphic or a Block.
 */
RS_Document* RS_Entity::getDocument() {
    if (isDocument()==true) {
        return (RS_Document*)this;
    } else if (parent==NULL) {
        return NULL;
    } else {
        return parent->getDocument();
    }
}