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actions/rs_actiondrawcircle.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_actiondrawcircle.h"
+
+#include "rs_dialogfactory.h"
+#include "rs_graphicview.h"
+#include "rs_commandevent.h"
+#include "rs_circle.h"
+#include "rs_coordinateevent.h"
+#include "rs_math.h"
+#include "rs_preview.h"
+#include "rs_debug.h"
+
+RS_ActionDrawCircle::RS_ActionDrawCircle(RS_EntityContainer& container,
+        RS_GraphicView& graphicView)
+        :RS_PreviewActionInterface("Draw circles",
+						   container, graphicView)
+		,data(new RS_CircleData())
+{
+	actionType=RS2::ActionDrawCircle;
+    reset();
+}
+
+
+
+RS_ActionDrawCircle::~RS_ActionDrawCircle() = default;
+
+void RS_ActionDrawCircle::reset() {
+	data.reset(new RS_CircleData{});
+}
+
+
+
+void RS_ActionDrawCircle::init(int status) {
+    RS_PreviewActionInterface::init(status);
+
+    reset();
+}
+
+
+
+void RS_ActionDrawCircle::trigger() {
+    RS_PreviewActionInterface::trigger();
+
+    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();
+    }
+        graphicView->redraw(RS2::RedrawDrawing);
+    graphicView->moveRelativeZero(circle->getCenter());
+
+    setStatus(SetCenter);
+    reset();
+
+    RS_DEBUG->print("RS_ActionDrawCircle::trigger(): circle added: %d",
+                    circle->getId());
+}
+
+
+
+void RS_ActionDrawCircle::mouseMoveEvent(QMouseEvent* e) {
+    RS_DEBUG->print("RS_ActionDrawCircle::mouseMoveEvent begin");
+
+    RS_Vector mouse = snapPoint(e);
+    switch (getStatus()) {
+    case SetCenter:
+		data->center = mouse;
+        break;
+
+    case SetRadius:
+		if (data->center.valid) {
+			data->radius = data->center.distanceTo(mouse);
+            deletePreview();
+			preview->addEntity(new RS_Circle(preview.get(),
+											 *data));
+            drawPreview();
+        }
+        break;
+    }
+
+    RS_DEBUG->print("RS_ActionDrawCircle::mouseMoveEvent end");
+}
+
+
+
+void RS_ActionDrawCircle::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_ActionDrawCircle::coordinateEvent(RS_CoordinateEvent* e) {
+    if (!e){
+        return;
+    }
+
+    RS_Vector mouse = e->getCoordinate();
+
+    switch (getStatus()) {
+    case SetCenter:
+		data->center = mouse;
+        graphicView->moveRelativeZero(mouse);
+        setStatus(SetRadius);
+        break;
+
+    case SetRadius:
+		if (data->center.valid) {
+            graphicView->moveRelativeZero(mouse);
+			data->radius = data->center.distanceTo(mouse);
+            trigger();
+        }
+        //setStatus(SetCenter);
+        break;
+
+    default:
+        break;
+    }
+}
+
+
+
+void RS_ActionDrawCircle::commandEvent(RS_CommandEvent* e) {
+    QString c = e->getCommand().toLower();
+
+	if (checkCommand("help", c)) {
+		RS_DIALOGFACTORY->commandMessage(msgAvailableCommands()
+										 + getAvailableCommands().join(", "));
+		return;
+	}
+
+    switch (getStatus()) {
+
+    case SetRadius: {
+            bool ok;
+            double r = RS_Math::eval(c, &ok);
+            if (ok) {
+				data->radius = r;
+                e->accept();
+                trigger();
+			} else
+				RS_DIALOGFACTORY->commandMessage(tr("Not a valid expression"));
+            //setStatus(SetCenter);
+        }
+
+    default:
+        break;
+    }
+}
+
+
+
+QStringList RS_ActionDrawCircle::getAvailableCommands() {
+    QStringList cmd;
+    return cmd;
+}
+
+
+void RS_ActionDrawCircle::updateMouseButtonHints() {
+    switch (getStatus()) {
+    case SetCenter:
+        RS_DIALOGFACTORY->updateMouseWidget(tr("Specify center"), tr("Cancel"));
+        break;
+    case SetRadius:
+        RS_DIALOGFACTORY->updateMouseWidget(tr("Specify point on circle"), tr("Back"));
+        break;
+    default:
+		RS_DIALOGFACTORY->updateMouseWidget();
+        break;
+    }
+}
+
+
+
+void RS_ActionDrawCircle::showOptions() {
+    RS_ActionInterface::showOptions();
+}
+
+
+
+void RS_ActionDrawCircle::hideOptions() {
+    RS_ActionInterface::hideOptions();
+}
+
+
+
+void RS_ActionDrawCircle::updateMouseCursor() {
+    graphicView->setMouseCursor(RS2::CadCursor);
+}
+
+// EOF
+