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lib/gui/rs_painter.h

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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!
+**
+**********************************************************************/
+
+
+#ifndef RS_PAINTER_H
+#define RS_PAINTER_H
+
+#include "rs_vector.h"
+
+class RS_Color;
+class RS_Pen;
+class QPainterPath;
+class QRectF;
+class QPolygon;
+class QPolygonF;
+class QImage;
+class QBrush;
+
+/**
+ * This class is a common interface for a painter class. Such
+ * a class will in it's implementation be responsible to paint
+ * lines, arcs, ... in widgets. All angles in rad.
+ *
+ * Note that this is just an interface used as a slot to
+ * communicate with the LibreCAD from a GUI level. This
+ * does not contain any Qt or platform specific code.
+ */
+class RS_Painter {
+public:
+    RS_Painter(): offset{0.0,0.0} {
+        drawingMode = RS2::ModeFull;
+        drawSelectedEntities=false;
+    }
+	virtual ~RS_Painter() = default;
+
+    /**
+     * Sets the drawing mode.
+     */
+    void setDrawingMode(RS2::DrawingMode m) {
+        drawingMode = m;
+    }
+
+    // When set to true, only entities that are selected will be drawn
+    void setDrawSelectedOnly(bool dso) {
+        drawSelectedEntities=dso;
+    }
+
+    // When true, only selected items will be draw
+    bool shouldDrawSelected() {
+        return drawSelectedEntities;
+    }
+
+    /**
+     * @return Current drawing mode.
+     */
+    RS2::DrawingMode getDrawingMode() {
+        return drawingMode;
+    }
+
+    virtual void moveTo(int x, int y) = 0;
+    virtual void lineTo(int x, int y) = 0;
+
+    virtual void drawGridPoint(const RS_Vector& p) = 0;
+    virtual void drawPoint(const RS_Vector& p) = 0;
+    virtual void drawLine(const RS_Vector& p1, const RS_Vector& p2) = 0;
+    virtual void drawRect(const RS_Vector& p1, const RS_Vector& p2);
+    virtual void drawArc(const RS_Vector& cp, double radius,
+                         double a1, double a2,
+                         const RS_Vector& p1, const RS_Vector& p2,
+                         bool reversed) = 0;
+    virtual void drawArc(const RS_Vector& cp, double radius,
+                         double a1, double a2,
+                         bool reversed) = 0;
+    void createArc(QPolygon& pa,
+                   const RS_Vector& cp, double radius,
+                   double a1, double a2,
+                   bool reversed);
+    void createEllipse(QPolygon& pa,
+                       const RS_Vector& cp,
+                             double radius1, double radius2,
+                             double angle,
+                             double angle1, double angle2,
+                             bool reversed);
+    virtual void drawCircle(const RS_Vector& cp, double radius) = 0;
+    virtual void drawEllipse(const RS_Vector& cp,
+                             double radius1, double radius2,
+                             double angle,
+                             double angle1, double angle2,
+                             bool reversed) = 0;
+        virtual void drawImg(QImage& img, const RS_Vector& pos,
+            double angle, const RS_Vector& factor) = 0;
+
+    virtual void drawTextH(int x1, int y1, int x2, int y2,
+                           const QString& text) = 0;
+    virtual void drawTextV(int x1, int y1, int x2, int y2,
+                           const QString& text) = 0;
+
+    virtual void fillRect(int x1, int y1, int w, int h, const RS_Color& col) = 0;
+    virtual void fillRect ( const QRectF & rectangle, const RS_Color & color ) = 0;
+    virtual void fillRect ( const QRectF & rectangle, const QBrush & brush ) = 0;
+
+    virtual void fillTriangle(const RS_Vector& p1,
+                              const RS_Vector& p2,
+                              const RS_Vector& p3) = 0;
+
+    virtual void drawPath ( const QPainterPath & path ) = 0;
+    virtual void drawHandle(const RS_Vector& p, const RS_Color& c, int size=-1);
+
+    virtual RS_Pen getPen() const = 0;
+    virtual void setPen(const RS_Pen& pen) = 0;
+    virtual void setPen(const RS_Color& color) = 0;
+    virtual void setPen(int r, int g, int b) = 0;
+    virtual void disablePen() = 0;
+    virtual const QBrush& brush() const = 0;
+    virtual void setBrush(const RS_Color& color) = 0;
+    virtual void setBrush(const QBrush& color) = 0;
+    virtual void drawPolygon(const QPolygon& a, Qt::FillRule rule=Qt::WindingFill) = 0;
+    virtual void erase() = 0;
+    virtual int getWidth() const= 0;
+    virtual int getHeight() const= 0;
+    virtual double getDpmm() const= 0;
+
+    virtual void setOffset(const RS_Vector& o) {
+        offset = o;
+    }
+
+    virtual void setClipRect(int x, int y, int w, int h) = 0;
+    virtual void resetClipping() = 0;
+	int toScreenX(double x) const;
+	int toScreenY(double y) const;
+
+protected:
+    /**
+     * Current drawing mode.
+     */
+    RS2::DrawingMode drawingMode;
+    /**
+     * A fixed offset added to all entities drawn (useful for previews).
+     */
+    RS_Vector offset;
+
+    // When set to true, only selected entities should be drawn
+    bool drawSelectedEntities;
+
+
+};
+
+#endif