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Chenwenxuan
311
actions/rs_actiondrawellipsecenter3points.cpp
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311
actions/rs_actiondrawellipsecenter3points.cpp
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/****************************************************************************
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**
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* Draw ellipse by foci and a point on ellipse
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Copyright (C) 2011-2015 Dongxu Li (dongxuli2011@gmail.com)
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Copyright (C) 2011 R. van Twisk (librecad@rvt.dds.nl)
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**********************************************************************/
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#include <QAction>
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#include <QMouseEvent>
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#include "rs_actiondrawellipsecenter3points.h"
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#include "rs_dialogfactory.h"
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#include "rs_graphicview.h"
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#include "rs_commandevent.h"
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#include "rs_circle.h"
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#include "rs_ellipse.h"
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#include "rs_coordinateevent.h"
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#include "rs_preview.h"
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#include <QDebug>
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#include "rs_debug.h"
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struct RS_ActionDrawEllipseCenter3Points::Points {
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RS_VectorSolutions points;
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RS_CircleData cData;
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RS_EllipseData eData;
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bool valid{false};
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};
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/**
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* Constructor.
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*
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*/
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RS_ActionDrawEllipseCenter3Points::RS_ActionDrawEllipseCenter3Points(
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RS_EntityContainer& container,
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RS_GraphicView& graphicView)
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:RS_PreviewActionInterface("Draw ellipse by center and 3 points",
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container, graphicView)
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, pPoints(new Points{})
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{
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actionType=RS2::ActionDrawEllipseCenter3Points;
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}
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RS_ActionDrawEllipseCenter3Points::~RS_ActionDrawEllipseCenter3Points() = default;
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void RS_ActionDrawEllipseCenter3Points::init(int status) {
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RS_PreviewActionInterface::init(status);
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if (status==SetCenter) {
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pPoints->points.clear();
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}
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drawSnapper();
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}
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void RS_ActionDrawEllipseCenter3Points::trigger() {
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RS_PreviewActionInterface::trigger();
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RS_Ellipse* ellipse=new RS_Ellipse(container, pPoints->eData);
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deletePreview();
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container->addEntity(ellipse);
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// upd. undo list:
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if (document) {
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document->startUndoCycle();
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document->addUndoable(ellipse);
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document->endUndoCycle();
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}
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graphicView->moveRelativeZero(ellipse->getCenter());
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graphicView->redraw(RS2::RedrawDrawing);
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drawSnapper();
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setStatus(SetCenter);
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RS_DEBUG->print("RS_ActionDrawEllipseCenter3Points::trigger():"
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" entity added: %d", ellipse->getId());
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}
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void RS_ActionDrawEllipseCenter3Points::mouseMoveEvent(QMouseEvent* e) {
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// RS_DEBUG->print("RS_ActionDrawEllipseCenter3Points::mouseMoveEvent begin");
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RS_Vector mouse = snapPoint(e);
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if(getStatus() == SetCenter) return;
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pPoints->points.resize(getStatus());
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pPoints->points.push_back(mouse);
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if(preparePreview()) {
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switch(getStatus()) {
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case SetPoint1:
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{
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RS_Circle* circle=new RS_Circle(preview.get(), pPoints->cData);
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deletePreview();
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preview->addEntity(circle);
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drawPreview();
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}
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break;
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case SetPoint2:
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case SetPoint3:
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{
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deletePreview();
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RS_Ellipse* e=new RS_Ellipse(preview.get(), pPoints->eData);
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preview->addEntity(e);
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drawPreview();
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}
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default:
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break;
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}
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}
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RS_DEBUG->print("RS_ActionDrawEllipseCenter3Points::mouseMoveEvent end");
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}
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bool RS_ActionDrawEllipseCenter3Points::preparePreview(){
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pPoints->valid=false;
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switch(getStatus()) {
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case SetPoint1:
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{
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RS_Circle c(preview.get(), pPoints->cData);
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pPoints->valid= c.createFromCR(pPoints->points.at(0),
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pPoints->points.get(0).distanceTo(pPoints->points.get(1)));
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if (pPoints->valid){
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pPoints->cData = c.getData();
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}
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}
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break;
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case SetPoint2:
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case SetPoint3:
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{
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RS_Ellipse e(preview.get(), pPoints->eData);
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pPoints->valid= e.createFromCenter3Points(pPoints->points);
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if (pPoints->valid){
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pPoints->eData = e.getData();
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}
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}
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break;
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default:
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break;
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}
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return pPoints->valid;
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}
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void RS_ActionDrawEllipseCenter3Points::mouseReleaseEvent(QMouseEvent* e) {
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// Proceed to next status
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if (e->button()==Qt::LeftButton) {
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RS_CoordinateEvent ce(snapPoint(e));
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coordinateEvent(&ce);
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}
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// Return to last status:
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else if (e->button()==Qt::RightButton) {
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deletePreview();
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init(getStatus()-1);
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}
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}
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void RS_ActionDrawEllipseCenter3Points::coordinateEvent(RS_CoordinateEvent* e) {
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if (!e) return;
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RS_Vector mouse = e->getCoordinate();
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pPoints->points.alloc(getStatus()+1);
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pPoints->points.set(getStatus(), mouse);
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switch (getStatus()) {
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case SetCenter:
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graphicView->moveRelativeZero(mouse);
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setStatus(SetPoint1);
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break;
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case SetPoint1:
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case SetPoint2:
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for(int i=0;i<getStatus()-1;i++) {
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if( (mouse-pPoints->points.get(i)).squared() < RS_TOLERANCE15) {
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return;//refuse to accept points already chosen
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}
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}
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// setStatus(getStatus()+1);
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// break;
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// fall-through
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case SetPoint3:
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if( preparePreview()) {
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if(getStatus() == SetPoint3) {
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trigger();
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}else{
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setStatus(getStatus()+1);
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}
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}
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break;
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default:
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break;
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}
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}
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//fixme, support command line
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/*
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void RS_ActionDrawEllipseCenter3Points::commandEvent(RS_CommandEvent* e) {
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QString c = e->getCommand().toLower();
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if (checkCommand("help", c)) {
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RS_DIALOGFACTORY->commandMessage(msgAvailableCommands()
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+ getAvailableCommands().join(", "));
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return;
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}
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switch (getStatus()) {
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case SetFocus1: {
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bool ok;
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double m = RS_Math::eval(c, &ok);
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if (ok) {
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ratio = m / major.magnitude();
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if (!isArc) {
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trigger();
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} else {
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setStatus(SetAngle1);
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}
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} else {
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RS_DIALOGFACTORY->commandMessage(tr("Not a valid expression"));
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}
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}
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break;
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case SetAngle1: {
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bool ok;
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double a = RS_Math::eval(c, &ok);
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if (ok) {
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angle1 = RS_Math::deg2rad(a);
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setStatus(SetAngle2);
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} else
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RS_DIALOGFACTORY->commandMessage(tr("Not a valid expression"));
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}
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break;
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case SetAngle2: {
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bool ok;
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double a = RS_Math::eval(c, &ok);
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if (ok) {
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angle2 = RS_Math::deg2rad(a);
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trigger();
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} else
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RS_DIALOGFACTORY->commandMessage(tr("Not a valid expression"));
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}
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}
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break;
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default:
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break;
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}
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}
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*/
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QStringList RS_ActionDrawEllipseCenter3Points::getAvailableCommands() {
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return {};
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}
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void RS_ActionDrawEllipseCenter3Points::updateMouseButtonHints() {
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switch (getStatus()) {
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case SetCenter:
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RS_DIALOGFACTORY->updateMouseWidget(tr("Specify the center of ellipse"),
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tr("Cancel"));
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break;
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case SetPoint1:
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RS_DIALOGFACTORY->updateMouseWidget(tr("Specify the first point on ellipse"),
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tr("Cancel"));
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break;
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case SetPoint2:
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RS_DIALOGFACTORY->updateMouseWidget(tr("Specify the second point on ellipse"),
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tr("Back"));
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break;
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case SetPoint3:
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RS_DIALOGFACTORY->updateMouseWidget(tr("Specify the third point on ellipse"),
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tr("Back"));
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break;
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default:
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RS_DIALOGFACTORY->updateMouseWidget();
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break;
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}
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}
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void RS_ActionDrawEllipseCenter3Points::updateMouseCursor() {
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graphicView->setMouseCursor(RS2::CadCursor);
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}
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// EOF
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