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actions/rs_actiondrawcircle2p.cpp

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+/****************************************************************************
+**
+** This file is part of the LibreCAD project, a 2D CAD program
+**
+** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
+** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
+**
+**
+** 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 gpl-2.0.txt included in the
+** packaging of this file.
+**
+** 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
+**
+** This copyright notice MUST APPEAR in all copies of the script!
+**
+**********************************************************************/
+
+#include <QAction>
+#include <QMouseEvent>
+#include "rs_actiondrawcircle2p.h"
+
+#include "rs_dialogfactory.h"
+#include "rs_graphicview.h"
+#include "rs_commandevent.h"
+#include "rs_circle.h"
+#include "rs_coordinateevent.h"
+#include "rs_preview.h"
+
+struct RS_ActionDrawCircle2P::Points {
+	/**
+	 * 1st point.
+	 */
+	RS_Vector point1;
+	/**
+	 * 2nd point.
+	 */
+	RS_Vector point2;
+};
+
+RS_ActionDrawCircle2P::RS_ActionDrawCircle2P(RS_EntityContainer& container,
+        RS_GraphicView& graphicView)
+        :RS_PreviewActionInterface("Draw circles",
+						   container, graphicView)
+		, data(new RS_CircleData())
+		, pPoints(new Points{})
+{
+	actionType=RS2::ActionDrawCircle2P;
+    reset();
+}
+
+RS_ActionDrawCircle2P::~RS_ActionDrawCircle2P() = default;
+
+void RS_ActionDrawCircle2P::reset() {
+	data.reset(new RS_CircleData{});
+	pPoints->point1 = {};
+	pPoints->point2 = {};
+}
+
+
+
+void RS_ActionDrawCircle2P::init(int status) {
+    RS_PreviewActionInterface::init(status);
+
+    reset();
+}
+
+
+
+void RS_ActionDrawCircle2P::trigger() {
+    RS_PreviewActionInterface::trigger();
+
+    preparePreview();
+	if (data->isValid()) {
+        RS_Circle* circle = new RS_Circle(container,
+										  *data);
+        circle->setLayerToActive();
+        circle->setPenToActive();
+        container->addEntity(circle);
+
+        // upd. undo list:
+        if (document) {
+            document->startUndoCycle();
+            document->addUndoable(circle);
+            document->endUndoCycle();
+        }
+
+        RS_Vector rz = graphicView->getRelativeZero();
+                graphicView->redraw(RS2::RedrawDrawing);
+        graphicView->moveRelativeZero(rz);
+
+        setStatus(SetPoint1);
+        reset();
+	} else
+		RS_DIALOGFACTORY->requestWarningDialog(tr("Invalid Circle data."));
+}
+
+
+
+void RS_ActionDrawCircle2P::preparePreview() {
+	data.reset(new RS_CircleData{});
+	if (pPoints->point1.valid && pPoints->point2.valid) {
+		RS_Circle circle(nullptr, *data);
+		bool suc = circle.createFrom2P(pPoints->point1, pPoints->point2);
+        if (suc) {
+			data.reset(new RS_CircleData(circle.getData()));
+        }
+    }
+}
+
+
+void RS_ActionDrawCircle2P::mouseMoveEvent(QMouseEvent* e) {
+    RS_Vector mouse = snapPoint(e);
+    switch (getStatus()) {
+    case SetPoint1:
+		pPoints->point1 = mouse;
+        break;
+
+    case SetPoint2:
+		pPoints->point2 = mouse;
+        preparePreview();
+		if (data->isValid()) {
+			RS_Circle* circle = new RS_Circle(preview.get(), *data);
+            deletePreview();
+            preview->addEntity(circle);
+            drawPreview();
+        }
+        break;
+
+    default:
+        break;
+    }
+}
+
+
+
+void RS_ActionDrawCircle2P::mouseReleaseEvent(QMouseEvent* e) {
+    if (e->button()==Qt::LeftButton) {
+        RS_CoordinateEvent ce(snapPoint(e));
+        coordinateEvent(&ce);
+    } else if (e->button()==Qt::RightButton) {
+        deletePreview();
+        init(getStatus()-1);
+    }
+}
+
+
+
+void RS_ActionDrawCircle2P::coordinateEvent(RS_CoordinateEvent* e) {
+    if (e==NULL) {
+        return;
+    }
+
+    RS_Vector mouse = e->getCoordinate();
+
+    switch (getStatus()) {
+    case SetPoint1:
+		pPoints->point1 = mouse;
+        graphicView->moveRelativeZero(mouse);
+        setStatus(SetPoint2);
+        break;
+
+    case SetPoint2:
+		pPoints->point2 = mouse;
+        graphicView->moveRelativeZero(mouse);
+        trigger();
+        break;
+
+    default:
+        break;
+    }
+}
+
+
+
+void RS_ActionDrawCircle2P::commandEvent(RS_CommandEvent* e) {
+    QString c = e->getCommand().toLower();
+
+    if (checkCommand("help", c)) {
+		RS_DIALOGFACTORY->commandMessage(msgAvailableCommands()
+										 + getAvailableCommands().join(", "));
+        return;
+    }
+
+}
+
+
+
+QStringList RS_ActionDrawCircle2P::getAvailableCommands() {
+    QStringList cmd;
+    return cmd;
+}
+
+
+
+void RS_ActionDrawCircle2P::updateMouseButtonHints() {
+	switch (getStatus()) {
+	case SetPoint1:
+		RS_DIALOGFACTORY->updateMouseWidget(
+					tr("Specify first point"), tr("Cancel"));
+		break;
+	case SetPoint2:
+		RS_DIALOGFACTORY->updateMouseWidget(
+					tr("Specify second point"), tr("Back"));
+		break;
+	default:
+		RS_DIALOGFACTORY->updateMouseWidget();
+		break;
+	}
+}
+
+
+
+void RS_ActionDrawCircle2P::updateMouseCursor() {
+    graphicView->setMouseCursor(RS2::CadCursor);
+}
+
+// EOF
+