1 /****************************************************************************
2 **
3  * Draw ellipse by foci and a point on ellipse
4 
5 Copyright (C) 2011 Dongxu Li (dongxuli2011@gmail.com)
6 Copyright (C) 2011 R. van Twisk (librecad@rvt.dds.nl)
7 
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License
10 as published by the Free Software Foundation; either version 2
11 of the License, or (at your option) any later version.
12 
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 GNU General Public License for more details.
17 
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
21 **********************************************************************/
22 
23 #ifndef RS_ACTIONDRAWELLIPSE4POINTS_H
24 #define RS_ACTIONDRAWELLIPSE4POINTS_H
25 
26 #include "rs_previewactioninterface.h"
27 
28 struct RS_CircleData;
29 struct RS_EllipseData;
30 
31 /**
32  * Draw ellipse in XY direction by 4 points on ellipse
33  *
34  * @author Dongxu Li
35  */
36 class RS_ActionDrawEllipse4Points : public RS_PreviewActionInterface {
37         Q_OBJECT
38 public:
39     /**
40      * Action States.
41      */
42     enum Status {
43         SetPoint1,   //  Setting the First Point.  */
44         SetPoint2,   //  Setting the Second Point.  */
45         SetPoint3,   //  Setting the Third Point.  */
46         SetPoint4   //  Setting the Last Point.  */
47     };
48 
49 public:
50     RS_ActionDrawEllipse4Points(RS_EntityContainer& container,
51                                 RS_GraphicView& graphicView);
52 	~RS_ActionDrawEllipse4Points() override;
53 
54 	void init(int status=0) override;
55 
56 	void trigger() override;
57 	bool preparePreview();
58 
59 	void mouseMoveEvent(QMouseEvent* e) override;
60 	void mouseReleaseEvent(QMouseEvent* e) override;
61 
62 	void coordinateEvent(RS_CoordinateEvent* e) override;
63 	//    void commandEvent(RS_CommandEvent* e) override;
64 	QStringList getAvailableCommands() override;
65 
66 	void updateMouseButtonHints() override;
67 	void updateMouseCursor() override;
68 
69 protected:
70 	// 4 points on ellipse
71 	struct Points;
72 	std::unique_ptr<Points> pPoints;
73 };
74 
75 #endif
76