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actions/rs_actiondrawcircletan3.h

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+/****************************************************************************
+**
+ * Draw a common tangent circle of 3 existing circles
+ * Problem of Appollonius
+
+Copyright (C) 2012 Dongxu Li (dongxuli2011@gmail.com)
+Copyright (C) 2011 R. van Twisk (librecad@rvt.dds.nl)
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+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.
+**********************************************************************/
+
+#ifndef RS_ACTIONDRAWCIRCLETAN3_H
+#define RS_ACTIONDRAWCIRCLETAN3_H
+
+#include<vector>
+#include "rs_previewactioninterface.h"
+
+struct RS_CircleData;
+class RS_AtomicEntity;
+
+/**
+ * Draw Common tangential circle of 3 given circles, i.e. Appollonius's problem
+ *
+ * @author Dongxu Li
+ */
+class RS_ActionDrawCircleTan3 : public RS_PreviewActionInterface {
+        Q_OBJECT
+public:
+    /**
+     * Action States.
+     */
+    enum Status {
+        SetCircle1,   //  Setting the First Circle.  */
+        SetCircle2,   //  Setting the Second Circle.  */
+        SetCircle3,   //  Setting the Third Circle.  */
+        SetCenter   //  select the closest tangential Circle.  */
+    };
+
+public:
+    RS_ActionDrawCircleTan3(RS_EntityContainer& container,
+                                 RS_GraphicView& graphicView);
+	~RS_ActionDrawCircleTan3() override;
+
+	void init(int status=0) override;
+
+	void trigger() override;
+	bool getData();
+	bool preparePreview();
+
+	void mouseMoveEvent(QMouseEvent* e) override;
+	void mouseReleaseEvent(QMouseEvent* e) override;
+
+	//        void coordinateEvent(RS_CoordinateEvent* e) override;
+	//    void commandEvent(RS_CommandEvent* e) override;
+	QStringList getAvailableCommands() override;
+	void finish(bool updateTB=true) override;
+	void updateMouseButtonHints() override;
+	void updateMouseCursor() override;
+
+//protected:
+    private:
+	std::vector<double> verifyCenter(const RS_Vector& center) const;
+	std::vector<double> getRadii(RS_AtomicEntity* entity, const RS_Vector& center) const;
+    RS_Entity* catchCircle(QMouseEvent* e);
+
+	struct Points;
+	std::unique_ptr<Points> pPoints;
+
+    //list of entity types supported by current action
+    const EntityTypeList enTypeList = EntityTypeList {RS2::EntityArc, RS2::EntityCircle, RS2::EntityLine, RS2::EntityPoint};
+};
+
+#endif