add vcglib

vcglib/wrap/qt/trackball.h

@@ -0,0 +1,100 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2007                                                \/)\/    *
+* 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.                                                         *
+*                                                                           *
+****************************************************************************/
+
+#ifndef QT_TRACKBALL_H
+#define QT_TRACKBALL_H
+#include <wrap/qt/device_to_logical.h>
+
+/// Transforms the event coordintates (that are device independent)
+/// into the expected framebuffer coordinates (e.g.in opengl pixels)
+/// This is necessary because trackball works in the viewport coord systems.
+inline float QT2VCG_X( QWidget *qw, QMouseEvent *e)
+{
+  return QTLogicalToDevice(qw,e->x());
+}
+
+/// Transforms the event coordintates (that are device independent)
+/// into the expected framebuffer coordinates (e.g.in opengl pixels)
+/// This is necessary because trackball works in the viewport coord systems.
+
+inline float QT2VCG_Y( QWidget *qw, QMouseEvent *e)
+{
+  return QTLogicalToDevice(qw,qw->height () - e->y ());
+}
+
+/// Takes a QT MouseButton, some QT KeyboardModifiers and returns the equivalent Trackball::Button
+inline  vcg::Trackball::Button QT2VCG (Qt::MouseButton qtbt, Qt::KeyboardModifiers modifiers)
+{
+  int vcgbt = vcg::Trackball::BUTTON_NONE;
+
+  if (qtbt & Qt::LeftButton)	vcgbt |= vcg::Trackball::BUTTON_LEFT;
+  if (qtbt & Qt::RightButton)	vcgbt |= vcg::Trackball::BUTTON_RIGHT;
+  if (qtbt & Qt::MidButton)		vcgbt |= vcg::Trackball::BUTTON_MIDDLE;
+
+  if (modifiers & Qt::ShiftModifier)		vcgbt |= vcg::Trackball::KEY_SHIFT;
+  if (modifiers & Qt::ControlModifier)	vcgbt |= vcg::Trackball::KEY_CTRL;
+  if (modifiers & Qt::AltModifier)			vcgbt |= vcg::Trackball::KEY_ALT;
+
+  return vcg::Trackball::Button (vcgbt);
+}
+
+/// Takes a QT ket and QT KeyboardModifiers and returns the mouse wheel related Trackball::Button
+inline vcg::Trackball::Button QTWheel2VCG (Qt::KeyboardModifiers modifiers)
+{
+  int vcgbt = vcg::Trackball::WHEEL;
+
+  if (modifiers & Qt::ShiftModifier)		vcgbt |= vcg::Trackball::KEY_SHIFT;
+  if (modifiers & Qt::ControlModifier)	vcgbt |= vcg::Trackball::KEY_CTRL;
+  if (modifiers & Qt::AltModifier)			vcgbt |= vcg::Trackball::KEY_ALT;
+
+  return vcg::Trackball::Button (vcgbt);
+}
+
+/// Takes some QT KeyboardModifiers and returns the mouse wheel related Trackball::Button
+inline vcg::Trackball::Button QTKey2VCG (int key, Qt::KeyboardModifiers modifiers)
+{
+  int vcgbt = 0;
+    switch (key) {
+        case Qt::Key_W    :
+        case Qt::Key_Up   : vcgbt = vcg::Trackball::KEY_UP   ; break;
+        case Qt::Key_A    :
+        case Qt::Key_Left : vcgbt = vcg::Trackball::KEY_LEFT ; break;
+        case Qt::Key_S    :
+        case Qt::Key_Down : vcgbt = vcg::Trackball::KEY_DOWN ; break;
+        case Qt::Key_D    :
+        case Qt::Key_Right: vcgbt = vcg::Trackball::KEY_RIGHT; break;
+        case Qt::Key_R    :
+        case Qt::Key_PageUp: vcgbt = vcg::Trackball::KEY_PGUP ; break;
+        case Qt::Key_F    :
+        case Qt::Key_PageDown: vcgbt = vcg::Trackball::KEY_PGDOWN; break;
+        default           : vcgbt = 0;
+    }
+
+  if (modifiers & Qt::ShiftModifier)		vcgbt |= vcg::Trackball::KEY_SHIFT;
+  if (modifiers & Qt::ControlModifier)	vcgbt |= vcg::Trackball::KEY_CTRL;
+  if (modifiers & Qt::AltModifier)			vcgbt |= vcg::Trackball::KEY_ALT;
+
+  return vcg::Trackball::Button (vcgbt);
+}
+
+#endif // QT_TRACKBALL_H