add vcglib

vcglib/wrap/gui/rubberband.h

@@ -0,0 +1,155 @@
+/****************************************************************************
+ * MeshLab                                                           o o     *
+ * A versatile mesh processing toolbox                             o     o   *
+ *                                                                _   O  _   *
+ * Copyright(C) 2008                                                \/)\/    *
+ * Visual Computing Lab                                            /\/|      *
+ * ISTI - Italian National Research Council                           |      *
+ *                                                                    \      *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * 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 (http://www.gnu.org/licenses/gpl.txt)          *
+ * for more details.                                                         *
+ *                                                                           *
+ ****************************************************************************/
+/****************************************************************************
+  History
+$Log: not supported by cvs2svn $
+Revision 1.1  2008/02/16 12:00:34  benedetti
+first version, adapted from meshlab's editmeasure plugin
+
+
+****************************************************************************/
+#ifndef RUBBERBAND_H
+#define RUBBERBAND_H
+
+#include <vcg/space/color4.h>
+#include <QGLWidget>
+
+namespace vcg {
+
+/*!
+  @brief The Rubberband class.
+
+  This class is useful for interactively draw a straight line between 2 pickable points in a GL widget.
+*/
+class Rubberband
+{
+public:
+  //data:
+
+  /// The color of the rubberband
+  Color4b color;
+
+  // functions:
+
+  /*!
+    @brief The constructor.
+
+    Initialize the rubberband data.
+  */
+  Rubberband(Color4b);
+
+  /*!
+    @brief The destructor.
+
+    The destructor.
+  */
+  virtual ~Rubberband() {}
+
+  /*!
+    @brief Render the rubberband and do the picking.
+
+    Is important that this function is called in order to apply the Drag and Pin commands.
+
+    @param glw the GL widget.
+  */
+  void Render(QGLWidget* glw);
+
+
+  /*!
+    @brief RenderLine draws a line from two points.
+
+	@param glw the GL widget.
+	@param AA the start point.
+	@param BB the end point.
+  */
+  void RenderLine(QGLWidget* gla, Point3f AA, Point3f BB);
+
+  /*!
+    @brief Set the current rubberband endpoint.
+
+    This function should be called after MouseMove events.
+
+    @param cursor the cursor position.
+  */
+  void Drag(QPoint cursor);
+
+  /*!
+    @brief Ask for picking.
+
+    This function should be called after MouseRelease events.
+
+    The first time is called, if the picking is successful, sets the startpoint.
+    The second time sets, if the picking is successful, the endpoint.
+    After the second time this has no effect.
+
+    @param cursor the cursor position.
+  */
+  void Pin(QPoint cursor);
+
+  /*!
+    @brief Reset the rubberband.
+  */
+  void Reset();
+
+  /*!
+    @brief Return true if the rubberband has been drawn.
+
+    @return true if the line has been drawn, false otherwise.
+  */
+  bool IsReady();
+
+  /*!
+    @brief Get the rubberband start and end points.
+
+    @param startpoint is set to the rubberband start point.
+    @param endpoint  is set to the rubberband end point.
+    @warning Don't call this function until IsReady() returns true!
+  */
+  void GetPoints(Point3f &startpoint,Point3f &endpoint);
+
+  /*!
+    @brief Render a text label near the endpoint (if it exists).
+
+    @param text the text to render.
+    @param glw the GL widget.
+  */
+private:
+  // types:
+  typedef enum { RUBBER_BEGIN = 0,
+                 RUBBER_DRAGGING = 1,
+                 RUBBER_DRAGGED = 2,
+               } RubberPhase;
+  // data:
+  RubberPhase currentphase;
+  QPoint qt_cursor;
+  Point3f start, end;
+  bool have_to_pick;
+//  QFont font;
+  // functions:
+  vcg::Point2f DevicePixelConvert(const Point3f);
+
+};
+
+}//namespace
+
+#endif /*RUBBERBAND_H*/