render_area.hpp 19.9 KB
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/*!
 *\file render_area.hpp
 */

#ifndef RENDER_AREA_HPP
#define RENDER_AREA_HPP

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class Render_area;

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#include <QtGui>
#include <QGLWidget>/* for the OpenGL Widget */
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#include "render.hpp"
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#include "resource.hpp"
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/*!
 * \brief Structure used to store event information.
 */
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struct Event_{
    Element_pos time;
    Element_pos height;
    Element_pos container_height;
};
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/*!
 * \brief Structure used to store arrow information.
 */
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struct Arrow_{
    Element_pos start_time;
    Element_pos end_time;
    Element_pos start_height;
    Element_pos end_height;
};


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/*!
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 * \brief This class redefined the OpenGL widget - QGLWidget - to display the trace.
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 */
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class Render_area : public QGLWidget, public Render
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 {
     Q_OBJECT
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 protected:
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     /*!
      * \brief Contains container text coordinates.
      */
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     std::list<Element_pos> _text_pos;

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     /*!
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      * \brief Contains container strings.
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      */
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     std::list<std::string> _text_value;
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     /*!
      * \brief Contains arrow informations.
      */
     std::vector<Arrow_> _arrows;
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     /*!
      * \brief Contains event informations.
      */
     std::vector<Event_> _events;
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     /***********************************
      *
      * Render area state attributes.
      *
      **********************************/
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     /*!
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      * \brief State when there is no file opened.
      */
     static const int DRAWING_STATE_WAINTING = 1;
     
     /*!
      * \brief State when the application is drawing traces.
      */
     static const int DRAWING_STATE_DRAWING = 2;
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     /*!
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      * \brief Contains the kind of state for the render area (drawing, waiting, etc.).
      */
     int _state;
 


     /***********************************
      *
      * Default QGLWidget functions.
      *
      **********************************/
     
     /*!
      * \brief Call by the system to initialize the OpenGL render area.
      */
     void initializeGL();
     
     /*!
      * \brief Call by the system when the render area was resized (occurs during a window resizement).
      * \arg width : the new width of the render area.
      *      height : the new height of the render area. 
      */
     void resizeGL(int width, int height);
     
     /*!
      * \brief Call by the system each time the render area need to be updated.
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      */
     void paintGL();
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     /***********************************
      *
      * The wait screen drawing.
      *
      **********************************/

     
     /***********************************
      * The wait list Attributes.
      **********************************/
     
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     /*!
      * \brief Used for draw counter.
      */
     bool _line_already_begun;

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     /*!
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      * \brief The wait GLu list.
      */
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     GLuint _wait_list;
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     /*!
      * \brief The container GLu list.
      */
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     GLuint _list_containers;
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     /*!
      * \brief The state GLu list.
      */
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     GLuint _list_states;
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     /*!
      * \brief The counter GLu list.
      */
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     GLuint _list_counters;
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     /*!
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      * \brief Rotation angle for the wait.
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     */
     float _wait_angle;

     /*!
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      * \brief Time in ms between two frames for the waiting screen.
      */
     static const int DRAWING_TIMER_DEFAULT = 10;
     
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     /*!
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      * \brief Wait animation seconds per frame.
      */
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     int _wait_spf;
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     /*!
      * \brief Timer to animate the wait. 
      */
     QTimer* _wait_timer;
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     /***********************************
      * Drawing function for the wait screen.
      **********************************/
     
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     /*!
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     * \brief Display a wait on the screen if there is no file opened.
     * \return Asset value of the wait.
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     */
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     GLuint draw_wait();



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     /***********************************
      *
      * The trace drawing.
      *
      **********************************/


     /***********************************
      * The drawing list Attributes.
      **********************************/
     
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     /*!
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      * \brief The trace Glu list.
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     */
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     GLuint _drawing_list;
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     /*!
      * \brief The last x position of the point (for counter).
      */
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     Element_pos _counter_last_x;

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     /*!
      * \brief The last y position of the point (for counter).
     */
     Element_pos _counter_last_y;
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     /*!
      * \brief The opengl render area width in pixels.
      */
     Element_pos _screen_width;

     /*!
      * \brief The opengl render area height in pixels.
      */
     Element_pos _screen_height;

     /*!
      * \brief The opengl visibled scene width in the OpenGL units.
      */
     Element_pos _render_width;

     /*!
      * \brief The opengl visibled scene height in the OpenGL units.
      */
     Element_pos _render_height;

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     /*!
      * \brief The width of container area draw.
      */
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     Element_pos _container_x_max;
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     /*!
      * \brief The height of container area draw.
      */
     Element_pos _container_y_max;
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     /*!
      * \brief The width of state area draw.
      */
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     Element_pos _state_x_max;
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     /*!
      * \brief The height of state area draw.
      */
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     Element_pos _state_y_max;
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     /*!
      * \brief z position for containers. 
      */
     Element_pos _z_container;

     /*!
      * z position for states.
      */
     Element_pos _z_state;
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     /*!
      * z position for events.
      */
     Element_pos _z_event;
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     /*!
      * z position for arrows.
      */
     Element_pos _z_arrow;
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     /*!
      * z position for counters.
      */
     Element_pos _z_counter;

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     /***********************************
      * Trace Drawing functions and attributes.
      **********************************/
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     /*!
      * \brief The percentage taken by container display in the render area.
      */
     Element_pos _x_scale_container_state;/* temporary */
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     /*!
      * \brief the scale of state drawing.
      */
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     int _state_scale;/* temporary */
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     /*!
      * \brief The x position of camera view for state drawing area.
     */
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     int _state_translate;/* temporary */
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 public:
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     /***********************************
      *
      * Constructor and destructor.
      *
      **********************************/

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     /*!
     * \brief The default constructor
     */
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     Render_area(QWidget *parent);
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     /*!
     * \brief The destructor
     */
     virtual ~Render_area();
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     /***********************************
      *
      * Building functions.
      *
      **********************************/

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     /*!
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      * \brief This function draws the trace.
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      * \arg trace the trace which be displayed. 
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      */
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     bool build();
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     /*!
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      * \brief This function releases the trace.
      */
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     bool unbuild();

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     /*!
     * \brief Change the scale of state drawing.
     * \param scale The new scale value.
     */
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     void change_scale(int scale);/* temporary -> to change the scale to view states */
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     /*!
     * \brief Change the x position of camera view for state drawing area.
     * \param translate The new position.
     */
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     void change_translate(int translate);/* temporary -> to change the translate to view states */
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     /*!
     * \brief Change the percentage taken by container display in the render area.
     * \param view_size The new percentage (between 0 to 100).
     */
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     void change_scale_container_state(int view_size);/* temporary -> to change the size of container view */

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     /*!
      * \brief Proceeds with the initialization of the OpenGL draw functions.
      */
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     void start_draw();
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     /*!
      * \brief Creates and opens the display list for container draws.
      */
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     void start_draw_containers();
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     /*!
     * \brief Draw a container according to the parameters
     * \param x the x position of the container
     * \param y the y position of the container
     * \param w the width of the container
     * \param h the height of the container
     */
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     void draw_container(const Element_pos x, const Element_pos y, const Element_pos w, const Element_pos h);
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     /*!
      * \brief Draw the text of a container.
      * \param x the x position of the text.
      * \param y the y position of the text.
      * \param value the string value of the text.
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      *
      * This function stores text in a list. This list will be display each time the render area need to be updated.
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      */
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     void draw_container_text(const Element_pos x, const Element_pos y, const std::string value);
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     /*!
      * \brief Closes the container display list.
      */
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     void end_draw_containers();
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     /*!
      * \brief Creates and opens the display list for stater draws.
      */
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     void start_draw_states();
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     /*!
      * \brief Draw a state of the trace.
      * \param start the beginning time of the state.
      * \param end the ending time of the state.
      * \param base vertical position of the state.
      * \param height the state height.
      * \param r the red color rate of the state.
      * \param g the green color rate of the state.
      * \param b the blue color rate of the state.
      */
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     void draw_state(const Element_pos start , const Element_pos end, const Element_pos base, const Element_pos height, const Element_col r, const Element_col g, const Element_col b);

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     /*!
      * \brief Closes the state display list.
      */
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     void end_draw_states();
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     /*!
      * \brief Draw an arrow.
      * \param start_time the beginning time of the arrow.
      * \param end_time the ending time of the arrow.
      * \param start_height vertical position of the begining time of the arrow.
      * \param end_height vertical position of the ending time of the arrow.
      *
      * This function stores all the information of the arrow to display it each time the render area need to be updated.
      */
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     void draw_arrow(const Element_pos start_time, const Element_pos end_time, const Element_pos start_height, const Element_pos end_height);
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     /*!
      * \brief Draw arrows contained in the Arrow_ vector
      * \param arrows An arrow vector.
      */
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     void draw_stored_arrows(std::vector<Arrow_> &arrows);

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     /*!
      * \brief Draw an event.
      * \param time time when the event occurs.
      * \param height vertical position of the event.
      * \param container_height information to draw event. It corresponds to the container height when they are drawn horizontally.
      *
      * This function stores all the information of the event to display it each time the render area need to be updated.
      */
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     void draw_event(const Element_pos time, const Element_pos height,  const Element_pos container_height);

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     /*!
      * \brief Draw events contained in the Event_ vector
      * \param events An event vector.
      */
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     void draw_stored_events(std::vector<Event_> &events);

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     /*!
      * \brief Creates and opens the display list for counter draws.
      */
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     void start_draw_counter();
     
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     /*!
      * \brief Draw a point of the counter.
      * \param x x position of the point.
      * \param y y position of the point.
      *
      * Each time counter is increased, this function is called with the coordinates of the new point.
      */
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     void draw_counter(const Element_pos x, const Element_pos y);
     
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     /*!
      * \brief Closes the counter display list.
      */
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     void end_draw_counter();
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     /*!
      * \brief Do nothing (it is present for compatibility of the Render class).
      */
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     void end_draw();
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  };

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/* inline function area */


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/***********************************
 *
 *
 *
 * Drawing function for the trace.
 *
 *
 *
 **********************************/

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inline void Render_area::start_draw(){
    /* clear lists to store container texts */
    _text_pos.clear();
    _text_value.clear();
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    /* clear the event vector */
    _events.clear();

    /* clear the arrow vector */
    _arrows.clear();
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}


inline void Render_area::start_draw_containers(){

    _list_containers = glGenLists(1);/* create the list */
    if (_list_containers==0){
        
        //        _parent->warning("Error when creating list");
    }

    glNewList(_list_containers, GL_COMPILE);/* open the list */

}


inline void Render_area::draw_container(const Element_pos x, const Element_pos y, const Element_pos w, const Element_pos h) {

    float j=0.6;

    glBegin(GL_QUADS);/* create a quads */
    {
        glColor3d(0, 0, j);glVertex2d(x, y);
        glColor3d(0, 0, j-0.1);glVertex2d(x, y+h);
        glColor3d(0, 0, j-0.1);glVertex2d(x+w, y+h);
        glColor3d(0, 0, j);glVertex2d(x+w, y);
    }
    glEnd();

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    if ((x+w)>_container_x_max)
        _container_x_max = x+w;
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    if ((y+h)>_container_y_max)
        _container_y_max = y+h;
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}

inline void Render_area::draw_container_text(const Element_pos x, const Element_pos y, const std::string value){

    _text_pos.push_back(x); 
    _text_pos.push_back(y);
    _text_value.push_back(value);

}



inline void Render_area::end_draw_containers(){
    glEndList();/* close the list */
}




inline void Render_area::start_draw_states(){

    _list_states = glGenLists(1);/* create the list */
    if (_list_states==0){
        
        //      _parent->warning("Error when creating list");
    }
    
    glNewList(_list_states, GL_COMPILE);/* open the list */
}


inline void Render_area::draw_state(const Element_pos start, const Element_pos end, const Element_pos base, const Element_pos height, const Element_col r, const Element_col g, const Element_col b){

    

#ifdef DEBUG_MODE_RENDER_AREA
    
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    std::cerr << __FILE__ << " l." << __LINE__ << ":" << std::endl;  
    std::cerr << "States position (for drawing): (x = " <<  start << ", y = " << base << ", w = " << end-start << ", h = " << height << ")" << std::endl << std::endl;  
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#endif

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    /** DEBUG **/
    //  if (start==end)
    /* std::cout << std::setprecision(15) << std::endl;
       std::cerr << "Start "<< start << " end " << end << std::endl;*/
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    glBegin(GL_QUADS);/* create a quads */
    {
        glColor3d(r, g, b);glVertex2d(start, base);
        glColor3d(r, g, b);glVertex2d(start, base + height);
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        glColor3d(r/1.5, g/1.5, b/1.5);glVertex2d(end, base + height);
        glColor3d(r/1.5, g/1.5, b/1.5);glVertex2d(end, base);
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    }
    glEnd();
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    if (end>_state_x_max)
        _state_x_max = end;
    
    if ((base+height)>_state_y_max)
        _state_y_max = base+height;
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}


inline void Render_area::end_draw_states(){
    glEndList();/* close the list */
}


inline void Render_area::draw_arrow(const Element_pos start_time, const Element_pos end_time, const Element_pos start_height, const Element_pos end_height){

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    Arrow_ buf;

    buf.start_time = start_time;
    buf.end_time = end_time;
    buf.start_height = start_height;
    buf.end_height = end_height;

    _arrows.push_back(buf);
}



inline void Render_area::draw_stored_arrows(std::vector<Arrow_> &arrows){

    Element_pos start_time, end_time, start_height, end_height;

    /* Manage the event drawing size from state size and render area dimensions */
    Element_pos arrow_scale_x = _state_scale*(_render_width/_state_x_max);
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    Element_pos arrow_scale_y = _render_height/_container_y_max;
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    Element_pos angle;

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    for (long i=0 ; i<(long)arrows.size() ; i++){
        
        
        start_time = arrows[i].start_time*arrow_scale_x + _render_width*_x_scale_container_state-_state_translate; 
        end_time = arrows[i].end_time*arrow_scale_x + _render_width*_x_scale_container_state-_state_translate; 
        start_height = arrows[i].start_height*arrow_scale_y;
        end_height = arrows[i].end_height*arrow_scale_y;
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        /* DEBUG */
        // std::cerr << "Arrow draw: (" << start_time << ", " << start_height << ") to (" << end_time << ", " << end_height << ")" << std::endl;


        glPushMatrix();
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        glTranslated(end_time, end_height, _z_arrow);
        glScalef(2, 2, 0);/* should be set */
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        if (start_time != end_time){
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            angle = atan2((end_height - start_height), (end_time - start_time))*180.0f/PI;/* arc tangent */
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            glRotatef(angle, 0, 0, 1);
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        }/* end if (start_time != end_time) */
        else
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            glRotatef(90, 0, 0, 1);/* vertical alignment */
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        glBegin(GL_TRIANGLES);/* create an arrow */
        {
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            glColor3d(1.0, 1.0, 1.0);glVertex2d(0.0, 0.0);
            glColor3d(0.9, 0.9, 0.9);glVertex2d(-0.6, -0.2);
            glColor3d(0.9, 0.9, 0.9);glVertex2d(-0.6, 0.2);
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        }
        glEnd();
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        glPopMatrix();
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        glPushMatrix();
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        glTranslated(0, 0, _z_arrow);
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        // glLineWidth(1.5f);
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        glBegin(GL_LINES);
        {
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            glColor3d(0.8, 0.8, 0.8);glVertex2d(start_time, start_height);
            glColor3d(1.0, 1.0, 1.0);glVertex2d(end_time, end_height);
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        }
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        glEnd();
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        // glLineWidth(1.0f);/* 1 is the default value */
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        glPopMatrix();
    }
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}


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inline void Render_area::draw_event(const Element_pos time, const Element_pos height,  const Element_pos container_height){

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    Event_ buf;

    buf.time = time;
    buf.height = height;
    buf.container_height = container_height;

    _events.push_back(buf);
}


inline void Render_area::draw_stored_events(std::vector<Event_> &events){

    Element_pos time, height, container_height;

    /* Manage the event drawing size from state size and render area dimensions */
    Element_pos event_scale_x = _state_scale*(_render_width/_state_x_max);
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    Element_pos event_scale_y = _render_height/_container_y_max;
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    Element_pos radius;/* the circle radius */
    Element_pos angle;
    Element_pos delta_angle;
    int step;


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    for (long i=0 ; i<(long)events.size() ; i++){
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        time = events[i].time*event_scale_x + _render_width*_x_scale_container_state-_state_translate; 
        height = events[i].height*event_scale_y;
        container_height = events[i].container_height*event_scale_y;
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        /* DEBUG */
        //  std::cerr << "Event draw: (" << time << ", " << height << ") with height of:" << container_height << " - " << _render_width << " : " << _render_height << std::endl;
    
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        /* IMPROVEMENT: put the circle into a display list */
        


        /* draw a circle */
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        radius = 1.0f;
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        angle = PI/2.0f;
        step = 20;/* 20 polygons for the circle */
        
        if (step!=0)
            delta_angle = 2*PI/step;
        
        
        glColor3d(0.5, 0.8, 0.5);
        glBegin(GL_POLYGON);
        {
            for(int i =0 ; i<step ; i++){
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                glVertex3d(time + cos(angle+delta_angle*i)*radius , height + sin(angle+delta_angle*i)*radius , _z_event);
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            }
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        }
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        glEnd();
        
        /* draw line */
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        // glLineWidth(1.5f);
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        glBegin(GL_LINES);
        {
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            glColor3d(0.5, 0.8, 0.5);glVertex3d(time, height, _z_event);
            glColor3d(0.4, 0.7, 0.4);glVertex3d(time, height+container_height, _z_event);
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        }
        glEnd();
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        // glLineWidth(1.0f);
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    }/* and loop */
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}


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/********************
 * Counter
 *******************/

inline void Render_area::start_draw_counter(){

    _list_counters = glGenLists(1);/* create the list */
    if (_list_counters==0){
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        std::cerr << "Error when creating list" << std::endl;
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    }
    
    glNewList(_list_counters, GL_COMPILE);/* open the list */

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}


inline void Render_area::draw_counter(const Element_pos x, const Element_pos y){
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    if (x <= 0.0 ){
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        if (_line_already_begun==true){/* it is not the first call */
              glEnd();
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        }else
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            _line_already_begun = true;
        
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        glBegin(GL_LINE_STRIP);/* set of connected verteces */
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        glColor3d(1.0, 1.0, 1.0);glVertex2d(0.0, y);/* draw the init point */
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        _counter_last_x = 0.0;
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    }else{
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        glColor3d(1.0, 1.0, 1.0);glVertex2d(x, y);
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        _counter_last_x = x;
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    }
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    _counter_last_y = y;
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}


inline void Render_area::end_draw_counter(){
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    if ( _line_already_begun == true){/* if a line was previously opened */
        glEnd();/* suppose that line is not ended */
    }
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    glEndList();/* close the list */
}


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inline void Render_area::end_draw(){

}


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 #endif