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GLUTCallbackFunctions.cpp File Reference

This file contains all important callback functions for the GLUT and GLUI events. More...

#include "../src/main.h"
#include "../src/Graph.h"
#include "../src/RadialLayout.h"
#include "../src/GLUTCallbackFunctions.h"

Include dependency graph for GLUTCallbackFunctions.cpp:

Include dependency graph

Go to the source code of this file.

Functions

void createGLUTWindow (Graph *graph, RadialLayout *radial_layout, GLuint screen_width, GLuint screen_height)
void createGLUI ()
void renderScene ()
void myGLUTIdleFunc ()
void myGLUTReshapeFunc (GLint screen_width, GLint screen_height)
void updateRenderMode ()
void startDemoMode ()
void myGLUTKeyboardEventFunc (unsigned char key, int x_pos, int y_pos)
void myGLUTMouseEventFunc (int button, int state, int x_pos, int y_pos)
int retrieveObjectID (int x_coord, int y_coord)
void myGlutMotion (int x_pos, int y_pos)
void resetSceneRotation ()
void toggleCaptionEnabling ()

Variables

int main_window
Graph * graph_
RadialLayout * radial_layout_
GLuint screen_width_
GLuint screen_height_
GLuint selected_animation_speed_
GLint selected_render_mode_
GLuint clicked_object_id_ = 0
GLuint motion_object_id_ = 0
bool is_animation_mode_active_ = false
bool is_fullscreen_mode_on_ = false
bool is_animation_running_ = false
GLuint num_iterations_ = 0
GLint last_x_pos_
GLint last_y_pos_
bool is_reset_rotation_ = true
GLfloat x_rotation_ = 0.0
GLfloat y_rotation_ = 0.0
GLfloat z_rotation_ = 0.0
bool is_left_mouse_button_down_ = true
int is_caption_enabled_ = true

Detailed Description

This file contains all important callback functions for the GLUT and GLUI events.

Definition in file GLUTCallbackFunctions.cpp.

Function Documentation

void createGLUI (   ) 
 

This creates the GLUI for the application.

Definition at line 98 of file GLUTCallbackFunctions.cpp.

References is_caption_enabled_, main_window, myGLUTIdleFunc(), resetSceneRotation(), selected_animation_speed_, selected_render_mode_, startDemoMode(), toggleCaptionEnabling(), and updateRenderMode().

Referenced by createGLUTWindow(). 

00099 {
00100 //exit(3434);
00101   GLUI *glui_window = GLUI_Master.create_glui("Menu");
00102     // for he animation speed
00103 
00104   GLUI_Spinner *animation_speed_spinner =
00105     glui_window->add_spinner("Speed:", GLUI_SPINNER_INT,
00106                              &selected_animation_speed_);
00107 
00108   animation_speed_spinner->set_int_limits(100, 2000);
00109 
00110     // for he render mode
00111   GLUI_Panel *radio_group_panel = glui_window->add_panel("Render Mode");
00112   GLUI_RadioGroup *render_mode_radio_group =
00113     glui_window->add_radiogroup_to_panel(radio_group_panel,
00114                                          &selected_render_mode_, 1,
00115                                          (GLUI_Update_CB)updateRenderMode);
00116 
00117     // put on the GLUI
00118   glui_window->add_checkbox("Enable Caption", &is_caption_enabled_, 2,
00119                              (GLUI_Update_CB)toggleCaptionEnabling);
00120   glui_window->add_radiobutton_to_group(render_mode_radio_group,
00121                                         "Ivan's Version");
00122   glui_window->add_radiobutton_to_group(render_mode_radio_group,
00123                                         "Laura's Version");
00124   glui_window->add_button("Demo", 0, (GLUI_Update_CB)startDemoMode);
00125   glui_window->add_button("Reset Rotation", 0,
00126                           (GLUI_Update_CB)resetSceneRotation);
00127   glui_window->add_separator();
00128   glui_window->add_button("Quit", 0, (GLUI_Update_CB)exit);
00129 
00130   glui_window->set_main_gfx_window(main_window);
00131 
00132     // register the idle callback with GLUI (not with GLUT!)
00133   GLUI_Master.set_glutIdleFunc(myGLUTIdleFunc);
00134 }

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void createGLUTWindow (  Graph *  graph,
RadialLayout *  radial_layout,
GLuint  screen_width,
GLuint  screen_height
) 
 

This is the callback function for the GLUT initializations.

Parameters:
graph The graph to draw.
radial_layout The radiallayout to draw.
screen_width The screen width.
screen_height The screen height.

Definition at line 54 of file GLUTCallbackFunctions.cpp.

References createGLUI(), Graph::createGraph(), graph_, main_window, myGLUTKeyboardEventFunc(), myGlutMotion(), myGLUTMouseEventFunc(), myGLUTReshapeFunc(), radial_layout_, renderScene(), screen_height_, and screen_width_.

Referenced by main(). 

00056 {
00057   screen_width_ = screen_width <= 0 ? 100 : screen_width;
00058   screen_height_ = screen_height <= 0 ? 100 : screen_height;
00059   if (graph == NULL)
00060   {
00061     cerr << "Graph is NULL." << endl;
00062     exit(0);
00063   }
00064   graph_ = graph;
00065 
00066   if (radial_layout == NULL)
00067   {
00068     cerr << "Radial Layout is NULL." << endl;
00069     exit(0);
00070   }
00071   radial_layout_ = radial_layout;
00072 
00073   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
00074   glutInitWindowPosition(50, 50);
00075   glutInitWindowSize(800, 600);
00076   main_window = glutCreateWindow("InfoViz: Animated Radial Tree Exploration");
00077 
00078     // assign the GLUT callback functions
00079   glutDisplayFunc(renderScene);
00080 
00081   glutReshapeFunc(myGLUTReshapeFunc);
00082   glutKeyboardFunc(myGLUTKeyboardEventFunc);
00083   glutMouseFunc(myGLUTMouseEventFunc);
00084   glutMotionFunc(myGlutMotion);
00085 
00086   // create graph
00087   graph_->createGraph("Hallo");
00088     // create the GLUI
00089   createGLUI();
00090     // run the GLUT main moop and wait for events
00091   glutMainLoop();
00092 }

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void myGLUTIdleFunc (   ) 
 

This creates the GLUI for the application.

Definition at line 226 of file GLUTCallbackFunctions.cpp.

References main_window.

Referenced by createGLUI(). 

00227 {
00228     // the current window is undefined during an idle callback; therefore we
00229     // need to explicitly change it if necessary
00230   if (glutGetWindow() != main_window)
00231   {
00232     glutSetWindow(main_window);
00233   }
00234   glutPostRedisplay();
00235 }

void myGLUTKeyboardEventFunc (  unsigned char  key,
int  x_pos,
int  y_pos
) 
 

This handles the key board events.

Parameters:
key The user-typed key.
x_pos The keyboard's x position.
y_pos The keyboard's y position.

Definition at line 289 of file GLUTCallbackFunctions.cpp.

References graph_, is_fullscreen_mode_on_, startDemoMode(), and Graph::toggleRenderMode().

Referenced by createGLUTWindow(). 

00290 {
00291   switch(key)
00292   {
00293   case 27 :
00294   case 'q' :
00295     exit(0);
00296   case GLUT_KEY_F1 :
00297     if (!is_fullscreen_mode_on_)
00298     {
00299       glutFullScreen();
00300       is_fullscreen_mode_on_ = true;
00301     }
00302     else
00303     {
00304       glutReshapeWindow(800, 600);
00305       is_fullscreen_mode_on_ = false;
00306     }
00307     break;
00308   case 'a' :
00309     startDemoMode();
00310     break;
00311   case 'm' :
00312     graph_->toggleRenderMode();
00313     break;
00314   default :
00315     break;
00316   };
00317 }

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void myGlutMotion (  int  x_pos,
int  y_pos
) 
 

This is the callback function for the motions in the scene.

Parameters:
x_pos The x position of the viewport.
y_pos The y position of the viewport.

Definition at line 407 of file GLUTCallbackFunctions.cpp.

References is_left_mouse_button_down_, last_x_pos_, last_y_pos_, screen_height_, screen_width_, x_rotation_, y_rotation_, and z_rotation_.

Referenced by createGLUTWindow(), and renderScene(). 

00408 {
00409   if (!is_left_mouse_button_down_)
00410   {
00411     x_rotation_ += (GLfloat) (y_pos - last_y_pos_);
00412     y_rotation_ += (GLfloat) (x_pos - last_x_pos_);
00413 
00414     last_x_pos_ = x_pos;
00415     last_y_pos_ = y_pos;
00416 
00417     if ((last_x_pos_ == screen_width_ / 2) ||
00418         (last_y_pos_ == screen_height_ / 2))
00419     {
00420     }
00421     else
00422     {
00423       if (((x_pos - screen_width_ / 2) * (last_y_pos_ - screen_height_ / 2)
00424            - (last_x_pos_ - screen_width_ / 2) * (y_pos - screen_height_ / 2))
00425           > 0)
00426       {
00427         z_rotation_ += (GLfloat) ((abs(x_pos - last_x_pos_)
00428                                    + abs(y_pos - last_y_pos_)));
00429       }
00430       else
00431       {
00432         z_rotation_ += (GLfloat) (-1*(abs(x_pos - last_x_pos_)
00433                                       + abs(y_pos - last_y_pos_)));
00434       }
00435     }
00436 
00437     glutPostRedisplay();
00438   }
00439 }

void myGLUTMouseEventFunc (  int  button,
int  state,
int  x_pos,
int  y_pos
) 
 

This handles the mouse events.

Parameters:
button Holds the flag which mouse button has been clicked.
state Indicates whether the mouse button is up or down.
x_pos The mouse cursor's x position.
y_pos The mouse cursor's y position.

Definition at line 327 of file GLUTCallbackFunctions.cpp.

References clicked_object_id_, graph_, Graph::highlightNodeIfSelected(), is_animation_running_, is_left_mouse_button_down_, Graph::isANodeClicked(), num_iterations_, retrieveObjectID(), and Graph::setCenterNode().

Referenced by createGLUTWindow(). 

00328 {
00329   if (button == GLUT_LEFT_BUTTON)
00330   {
00331     cout << x_pos << " " << y_pos << endl;
00332       // Here we pass in the cursors X and Y co-ordinates to test
00333       // an object under the mouse.
00334     clicked_object_id_ = retrieveObjectID(x_pos, y_pos);
00335     graph_->highlightNodeIfSelected(clicked_object_id_);
00336 
00337     if ((graph_->isANodeClicked(clicked_object_id_))
00338         && (is_animation_running_ == false))
00339     {
00340       num_iterations_ = 1;
00341       is_animation_running_ = true;
00342       graph_->setCenterNode(clicked_object_id_);
00343     }
00344   }
00345   if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN)
00346   {
00347     is_left_mouse_button_down_ = true;
00348   }
00349   else// (button == GLUT_LEFT_BUTTON && state == GLUT_UP)
00350   {
00351     is_left_mouse_button_down_ = false;
00352   }
00353 }

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void myGLUTReshapeFunc (  GLint  screen_width,
GLint  screen_height
) 
 

This reshapes the OpenGL window to specified resolution.

Definition at line 241 of file GLUTCallbackFunctions.cpp.

Referenced by createGLUTWindow(). 

00242 {
00243   GLfloat width_height_aspect =
00244     (GLfloat)screen_width / (GLfloat)screen_height;
00245 
00246   glViewport(0, 0, screen_width, screen_height);
00247 
00248   glMatrixMode(GL_PROJECTION);
00249   glLoadIdentity();
00250 
00251   glutPostRedisplay();
00252 }

void renderScene (   ) 
 

This renders the entire scene into OpenGL.

Definition at line 140 of file GLUTCallbackFunctions.cpp.

References Graph::drawGraph(), graph_, is_animation_mode_active_, is_animation_running_, is_reset_rotation_, last_x_pos_, last_y_pos_, myGlutMotion(), num_iterations_, radial_layout_, screen_height_, screen_width_, selected_animation_speed_, Graph::setAnimationMode(), Graph::setAnimationSpeed(), Graph::setSceneRotation(), x_rotation_, y_rotation_, and z_rotation_.

Referenced by createGLUTWindow(), and retrieveObjectID(). 

00141 {
00142   if ((is_animation_running_ == false)
00143     && (is_animation_mode_active_ == true))
00144   {
00145     num_iterations_ = 1;
00146     is_animation_running_ = true;
00147     graph_->setAnimationMode(true);
00148   }
00149   if (num_iterations_ <= selected_animation_speed_)
00150   {
00151     ++num_iterations_;
00152   }
00153   
00154   graph_->setAnimationSpeed(&selected_animation_speed_);
00155 
00156   GLfloat width_height_aspect =
00157     (GLfloat)screen_width_ / (GLfloat)screen_height_;
00158 
00159   glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
00160   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
00161 
00162   //glMatrixMode(GL_PROJECTION);
00163   //glLoadIdentity();
00164   glFrustum(-width_height_aspect * 0.04, width_height_aspect * 0.04, -0.04,
00165             0.04, 0.1, 15.0);
00166 
00167   glMatrixMode( GL_MODELVIEW );
00168   glLoadIdentity(); // reset the view
00169 
00170   //        position  view      up vector
00171   gluLookAt(0, 0, 6,  0, 0, 0,   0, 1, 0);
00172   
00173   // number of circles
00174   GLint num_circles = 10;
00175 
00176   // radius of the starting circle
00177   GLfloat radius = -0.1f;
00178   GLUquadricObj *qobj;
00179   qobj = gluNewQuadric();
00180 
00182   if (is_reset_rotation_ == true)
00183   {
00184     glRotatef(0.0f, 0.0f, 1.0f, 0.0f);
00185     glRotatef(0.0f, 1.0f, 0.0f, 0.0f);
00186     glRotatef(0.0f, 0.0f, 0.0f, 1.0f);
00187     is_reset_rotation_ = false;
00188     y_rotation_ = 0.0f;
00189     x_rotation_ = 0.0f;
00190     last_y_pos_ = 0.0f;
00191     last_x_pos_ = 0.0f;
00192     myGlutMotion(last_x_pos_, last_y_pos_);
00193   }
00194   else
00195   {
00196     glRotatef(y_rotation_, 0.0f, 1.0f, 0.0f);
00197     glRotatef(x_rotation_, 1.0f, 0.0f, 0.0f);
00198     glRotatef(0.0f, 0.0f, 0.0f, 1.0f);
00199   }
00201   glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
00202   glEnable(GL_LINE_SMOOTH);
00204   gluQuadricNormals(qobj, GLU_SMOOTH);
00205   glDisable(GL_BLEND);
00206   radial_layout_ -> setNumberDisplayedRings(num_circles);
00207   radial_layout_ -> setRadiusOfRing(1, radius);
00208   radial_layout_ -> renderRadialLayout(qobj);
00209 
00210   glInitNames();
00211   glPushName(0);
00212   graph_->setSceneRotation(x_rotation_, y_rotation_, z_rotation_);
00213   graph_->drawGraph(qobj);
00214   glColor3f(1.0f, 1.0f, 1.0f);
00215   glDisable(GL_LINE_SMOOTH);
00216 
00217   // swap buffers
00218   glutSwapBuffers(); 
00219   gluDeleteQuadric(qobj);
00220 }

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void resetSceneRotation (   ) 
 

This resets the rotation of the entire scene.

Definition at line 445 of file GLUTCallbackFunctions.cpp.

References is_reset_rotation_.

Referenced by createGLUI(). 

00446 {
00447   is_reset_rotation_ = true;
00448 }

int retrieveObjectID (  int  x_coord,
int  y_coord
) 
 

This finds the object which was clicked by the user given the x, y coordinates.

Parameters:
x_coord The x coordinate of the viewport.
y_coord The y coordinate of the viewport.

Definition at line 362 of file GLUTCallbackFunctions.cpp.

References renderScene(), screen_height_, and screen_width_.

Referenced by myGLUTMouseEventFunc(). 

00363 {
00364   int objectsFound = 0;
00365   int viewportCoords[4] = {0};
00366 
00367   unsigned int selectBuffer[1024] = {0};
00368 
00369   glSelectBuffer(1024, selectBuffer);
00370   glGetIntegerv(GL_VIEWPORT, viewportCoords);
00371 
00372   glMatrixMode(GL_PROJECTION);  
00373   glPushMatrix();
00374   glRenderMode(GL_SELECT);
00375   glLoadIdentity();
00376   gluPickMatrix(x_coord, viewportCoords[3] - y_coord, 2, 2, viewportCoords);
00377 
00378   gluPerspective(45.0f,(float)screen_width_/(float)screen_height_,0.1f,150.0f);
00379   glMatrixMode(GL_MODELVIEW);
00380 
00381   renderScene();
00382 
00383   objectsFound = glRenderMode(GL_RENDER);
00384   glMatrixMode(GL_PROJECTION);
00385   glPopMatrix();
00386 
00387   glMatrixMode(GL_MODELVIEW);
00388 
00389   if (objectsFound > 0)
00390   {
00391     unsigned int lowestDepth = selectBuffer[1];
00392 
00393     int selectedObject = selectBuffer[3];
00394 
00395       // Return the selected object
00396     return selectedObject;
00397   }
00398   return 0;
00399 }

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void startDemoMode (   ) 
 

This starts the demo mode.

Definition at line 267 of file GLUTCallbackFunctions.cpp.

References graph_, is_animation_mode_active_, is_animation_running_, num_iterations_, and Graph::setAnimationMode().

Referenced by createGLUI(), and myGLUTKeyboardEventFunc(). 

00268 {
00269   if (is_animation_mode_active_ == false)
00270   {
00271     num_iterations_ = 1;
00272     is_animation_mode_active_ = true;
00273     is_animation_running_ = true;
00274     graph_->setAnimationMode(true);
00275   }
00276   else
00277   {
00278     is_animation_mode_active_ = false;
00279   }
00280 }

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void toggleCaptionEnabling (   ) 
 

This toggles the caption of the nodes. If enablen the caption's will be displayed.

Definition at line 455 of file GLUTCallbackFunctions.cpp.

References graph_, and Graph::toggleCaptionMode().

Referenced by createGLUI(). 

00456 {
00457   graph_->toggleCaptionMode();
00458 }

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void updateRenderMode (   ) 
 

This updates the rendermode.

Definition at line 258 of file GLUTCallbackFunctions.cpp.

References graph_, and Graph::toggleRenderMode().

Referenced by createGLUI(). 

00259 {
00260   graph_->toggleRenderMode();
00261 }

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Variable Documentation

GLuint clicked_object_id_ = 0
 

Definition at line 26 of file GLUTCallbackFunctions.cpp.

Referenced by myGLUTMouseEventFunc(), and RenderingHandler::runMainLoop().

Graph* graph_
 

Definition at line 17 of file GLUTCallbackFunctions.cpp.

Referenced by createGLUTWindow(), myGLUTKeyboardEventFunc(), myGLUTMouseEventFunc(), renderScene(), startDemoMode(), toggleCaptionEnabling(), and updateRenderMode().

bool is_animation_mode_active_ = false
 

Definition at line 29 of file GLUTCallbackFunctions.cpp.

Referenced by renderScene(), and startDemoMode().

bool is_animation_running_ = false
 

Definition at line 32 of file GLUTCallbackFunctions.cpp.

Referenced by Graph::drawGraph(), NodeAnimation::interpolatePolarCoord(), myGLUTMouseEventFunc(), renderScene(), RenderingHandler::runMainLoop(), and startDemoMode().

int is_caption_enabled_ = true
 

Definition at line 44 of file GLUTCallbackFunctions.cpp.

Referenced by createGLUI().

bool is_fullscreen_mode_on_ = false
 

Definition at line 30 of file GLUTCallbackFunctions.cpp.

Referenced by myGLUTKeyboardEventFunc().

bool is_left_mouse_button_down_ = true
 

Definition at line 43 of file GLUTCallbackFunctions.cpp.

Referenced by myGlutMotion(), and myGLUTMouseEventFunc().

bool is_reset_rotation_ = true
 

Definition at line 38 of file GLUTCallbackFunctions.cpp.

Referenced by renderScene(), and resetSceneRotation().

GLint last_x_pos_
 

Definition at line 35 of file GLUTCallbackFunctions.cpp.

Referenced by myGlutMotion(), and renderScene().

GLint last_y_pos_
 

Definition at line 36 of file GLUTCallbackFunctions.cpp.

Referenced by myGlutMotion(), and renderScene().

int main_window
 

Definition at line 15 of file GLUTCallbackFunctions.cpp.

Referenced by createGLUI(), createGLUTWindow(), and myGLUTIdleFunc().

GLuint motion_object_id_ = 0
 

Definition at line 27 of file GLUTCallbackFunctions.cpp.

Referenced by RenderingHandler::runMainLoop().

GLuint num_iterations_ = 0
 

Definition at line 33 of file GLUTCallbackFunctions.cpp.

Referenced by Graph::drawGraph(), RenderingHandler::handleKeyPressEvent(), myGLUTMouseEventFunc(), RenderingHandler::renderScene(), renderScene(), RenderingHandler::runMainLoop(), and startDemoMode().

RadialLayout* radial_layout_
 

Definition at line 18 of file GLUTCallbackFunctions.cpp.

Referenced by createGLUTWindow(), and renderScene().

GLuint screen_height_
 

Definition at line 21 of file GLUTCallbackFunctions.cpp.

Referenced by createGLUTWindow(), WindowHandler::initOpenGL(), myGlutMotion(), renderScene(), and retrieveObjectID().

GLuint screen_width_
 

Definition at line 20 of file GLUTCallbackFunctions.cpp.

Referenced by createGLUTWindow(), WindowHandler::initOpenGL(), myGlutMotion(), renderScene(), and retrieveObjectID().

GLuint selected_animation_speed_
 

Definition at line 23 of file GLUTCallbackFunctions.cpp.

Referenced by createGLUI(), and renderScene().

GLint selected_render_mode_
 

Definition at line 24 of file GLUTCallbackFunctions.cpp.

Referenced by createGLUI().

GLfloat x_rotation_ = 0.0
 

Definition at line 39 of file GLUTCallbackFunctions.cpp.

Referenced by myGlutMotion(), and renderScene().

GLfloat y_rotation_ = 0.0
 

Definition at line 40 of file GLUTCallbackFunctions.cpp.

Referenced by myGlutMotion(), and renderScene().

GLfloat z_rotation_ = 0.0
 

Definition at line 41 of file GLUTCallbackFunctions.cpp.

Referenced by myGlutMotion(), and renderScene().

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