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2024-03-06 14:54:30 +08:00
commit edac2715f0
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--- a/lib/gui/rs_grid.h
+++ b/lib/gui/rs_grid.h
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+/****************************************************************************
+**
+** This file is part of the LibreCAD project, a 2D CAD program
+**
+** Copyright(C) 2015 Dongxu Li (dongxuli2011@gmail.com)
+** 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!
+**
+**********************************************************************/
+
+#ifndef RS_GRID_H
+#define RS_GRID_H
+
+#include "rs_vector.h"
+
+class RS_GraphicView;
+class QString;
+namespace lc {
+	namespace geo {
+		class Area;
+	}
+}
+
+using LC_Rect = lc::geo::Area;
+
+/**
+ * This class represents a grid. Grids can be drawn on graphic
+ * views and snappers can snap to the grid points.
+ *
+ * @author Andrew Mustun
+ */
+class RS_Grid
+{
+
+public:
+	RS_Grid(RS_GraphicView* graphicView);
+
+	void updatePointArray();
+
+	/**
+		 * @return Array of all visible grid points.
+		 */
+	std::vector<RS_Vector> const& getPoints() const;
+
+	/**
+	* \brief the closest grid point
+	* \return the closest grid to given point
+	* \param coord the given point
+	*/
+	RS_Vector snapGrid(const RS_Vector& coord) const;
+
+	/**
+		 * @return Number of visible grid points.
+		 */
+	int count() const;
+	void setCrosshairType(RS2::CrosshairType chType);
+	RS2::CrosshairType getCrosshairType() const;
+
+	/**
+		 * @return Grid info for status widget.
+		 */
+	QString getInfo() const;
+
+	/**
+		 * @return a vector of Meta grid positions in X.
+		 */
+	std::vector<double> const& getMetaX() const;
+
+	/**
+		 * @return a vector of Meta grid positions in Y.
+		 */
+	std::vector<double> const& getMetaY() const;
+
+	bool isIsometric() const;
+	void setIsometric(bool b);
+	RS_Vector getMetaGridWidth() const;
+	RS_Vector const& getCellVector() const;
+
+private:
+	//! copy ctor disabled
+	RS_Grid(RS_Grid const&) = delete;
+	RS_Grid& operator = (RS_Grid const&) = delete;
+	//! \{ \brief create grid points
+	void createOrthogonalGrid(LC_Rect const& rect, RS_Vector const& gridWidth);
+	void createIsometricGrid(LC_Rect const& rect, RS_Vector const& gridWidth);
+	//! \}
+
+	//! \{ \brief determine grid width
+	RS_Vector getMetricGridWidth(RS_Vector const& userGrid, bool scaleGrid, int minGridSpacing);
+	RS_Vector getImperialGridWidth(RS_Vector const& userGrid, bool scaleGrid, int minGridSpacing);
+	//! \}
+
+	//! Graphic view this grid is connected to.
+	RS_GraphicView* graphicView;
+
+	//! Current grid spacing
+	double spacing;
+	//! Current meta grid spacing
+	double metaSpacing;
+
+	//! Pointer to array of grid points
+	std::vector<RS_Vector> pt;
+	RS_Vector baseGrid; // the left-bottom grid point
+	RS_Vector cellV;// (dx,dy)
+	RS_Vector metaGridWidth;
+	//! Meta grid positions in X
+	std::vector<double> metaX;
+	//! Meta grid positions in Y
+	std::vector<double> metaY;
+	bool isometric;
+	RS2::CrosshairType crosshairType;
+
+};
+
+#endif