glwidget.h

// Copyright (c) 2009 Olivier Crave
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#ifndef GLWIDGET_H
#define GLWIDGET_H

#include <QtOpenGL/QGLWidget>

class StlFile;
class MdiChild;

class GLWidget : public QGLWidget {

  Q_OBJECT

 public:
  enum LeftMouseButtonMode {
    INACTIVE,
    ROTATE,
    PANNING
  };
  GLWidget(QWidget *parent = 0);
  ~GLWidget();
  QSize minimumSizeHint() const;
  QSize sizeHint() const;
  void makeObjectFromStlFile(StlFile*);
  void deleteObject();
  void setDefaultView();
  void zoom();
  void unzoom();
  void setBackView();
  void setFrontView();
  void setLeftView();
  void setRightView();
  void setTopView();
  void setBottomView();
  void setTopFrontLeftView();
  bool isWireframeModeActivated() const { return wireframeMode; };
  int getXRot() const { return xRot; };
  int getYRot() const { return yRot; };
  int getZRot() const { return zRot; };

 public slots:
  void setXRotation(int angle);
  void setYRotation(int angle);
  void setZRotation(int angle);
  void setXTranslation(const float distance);
  void setYTranslation(const float distance);
  void setZoom(const float zoom);
  void setLeftMouseButtonMode(const GLWidget::LeftMouseButtonMode);
  void setWireframeMode(const bool state);

 signals:
  void xRotationChanged(const int angle) const;
  void yRotationChanged(const int angle) const;
  void zRotationChanged(const int angle) const;
  void xTranslationChanged(const float distance) const;
  void yTranslationChanged(const float distance) const;
  void zoomChanged(const float zoom);

 protected:
  void initializeGL();
  void paintGL();
  void resizeGL(int width, int height);
  void mousePressEvent(QMouseEvent *event);
  void mouseReleaseEvent(QMouseEvent *event);
  void mouseMoveEvent(QMouseEvent *event);
  void wheelEvent(QWheelEvent *event);

 private:
  void triangle(GLdouble, GLdouble, GLdouble, GLdouble, GLdouble, GLdouble,
                GLdouble, GLdouble, GLdouble);
  void normalizeAngle(int *angle);
  void drawAxes();
  void updateCursor();
  //GLfloat panMatrix[16];
  int width, height;
  GLuint object;
  bool wireframeMode;
  LeftMouseButtonMode leftMouseButtonMode;
  int xRot, yRot, zRot;
  int xPos, yPos, zPos;
  float xTrans, yTrans, zTrans;
  float zoomFactor;
  float zoomInc;
  float defaultZoomFactor;
  QPoint lastPos;
  QColor grey, black, purple;
};

#endif  // GLWIDGET_H