callbacks_mht.cpp

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#include <gtk/gtk.h>

#include <graphviz/gvplugin_device.h>
#include <graphviz/gvplugin_render.h>
#include <graphviz/gvplugin.h>
#include <graphviz/gvc.h>
#include <graphviz/gvplugin_layout.h>
#include <graphviz/gvcjob.h>
#include <graphviz/gvcommon.h>
#include <graphviz/gvcext.h>
#include <graphviz/types.h>
#include <graphviz/graph.h>
#include <graphviz/geom.h>

#include "callbacks.h"//silly prototypes, this include is useless

#include <iostream>

#include <boost/format.hpp>

#include <mtt/hypothesisTree.h>

#include <mtt/graph_wrapper.h>

using namespace std;
using namespace boost;

extern GVGraph*graph_context;

extern hypothesisTreePtr htreePtr;

extern "C" {
        extern int agrelabel_node(Agnode_t * n, char *newname);
}

ostream& operator<< (ostream &o, const pointf &i)
{
        return o<<i.x<<" "<<i.y;
}

ostream& operator<< (ostream &o, const boxf &i)
{
        return o<<"LL: "<<i.LL<<" UR: "<<i.UR;
}


gboolean drawGraph(void)
{
        if(pthread_mutex_trylock(&(htreePtr->_draw_mutex))!=0)//its locked
                return false;
        
        if(htreePtr->need_layout==false)
        {
                pthread_mutex_unlock(&(htreePtr->_draw_mutex));
                return false;
        }

        graph_context->freeLayout();

        HypothesisTree::iterator parent;
        HypothesisTree::iterator it;
        
        graph_context->clearNodes();
                
        for(it = htreePtr->begin(); it != htreePtr->end(); ++it)
        {
                assert(*it!=0);
                
                graph_context->addNode((*it)->nameUI());

                for(uint a=0;a<(*it)->_attribute_names.size();++a)
                        graph_context->setNodeAttribute((*it)->nameUI(),(*it)->_attribute_names[a],(*it)->_attribute_values[a]);
                
                parent=htreePtr->parent(it);

                if(parent!=NULL)
                        graph_context->addEdge((*parent)->nameUI(),(*it)->nameUI());
        }

        graph_context->applyLayout();
        
        htreePtr->need_layout=false;
        
        pthread_mutex_unlock(&(htreePtr->_draw_mutex));
        
        return true;
}

gboolean DrawingareaExposeEvent(GtkWidget*widget,GdkEventExpose*event,gpointer user_data)
{       
//      cout<<"in expose"<<endl;
        pthread_mutex_lock(&(htreePtr->_draw_mutex));
        
        GVJ_t *job = (GVJ_t *)g_object_get_data(G_OBJECT(widget),"job");
        cairo_t *cr = gdk_cairo_create(widget->window);
        
        (job->callbacks->motion)(job, job->pointer);

        job->context = (void *)cr;
        job->external_context = true;
        job->width = widget->allocation.width;
        job->height = widget->allocation.height;
        
//      cout<<"refresh"<<endl;
        (job->callbacks->refresh)(job);
        
//      cout<<"destroy"<<endl;
        cairo_destroy(cr);
        
        pthread_mutex_unlock(&(htreePtr->_draw_mutex));
//      cout<<"out of DrawingareaExposeEvent"<<endl;
        return true;
}

gboolean DrawingareaButtonPressEvent(GtkWidget*widget,GdkEventButton *event,gpointer user_data)
{
        static bool init=true;
        static bool dragging=false;
        
        if(init)
        {
                g_object_set_data(G_OBJECT(widget),"dragging",&dragging);
                init=false;
        }
        
        if(event->type==GDK_BUTTON_PRESS)
                dragging=true;
        else if(event->type==GDK_BUTTON_RELEASE)
                dragging=false;
        
        return true;
}

gboolean DrawingareaMotionNotifyEvent(GtkWidget*widget,GdkEventMotion*event,gpointer user_data)
{
        static bool first_drag=true;
        
        GVJ_t *job = (GVJ_t *)g_object_get_data(G_OBJECT(widget),"job");
        
        bool *dragging_p = (bool*)g_object_get_data(G_OBJECT(widget),"dragging");
        if(!dragging_p)
                return FALSE;//the draging variable was not been set yet, it is set by the button press event handler
        
        bool dragging=*dragging_p;
        
        static pointf diff;
        
        double dpix=-1/job->devscale.x;//can also be interpreted as scroling speed
        double dpiy=-1/job->devscale.y;//can also be interpreted as scroling speed
                
        diff.x=event->x-job->pointer.x;
        diff.y=event->y-job->pointer.y;
        
        job->pointer.x = event->x;
        job->pointer.y = event->y;
        
        gtk_widget_queue_draw(widget);

        if(dragging)
        {
                if(first_drag)
                {
                        diff.x=0;
                        diff.y=0;
                        first_drag=false;
                }

                job->focus.x+= diff.x*dpix/job->zoom;
                job->focus.y+= diff.y*dpiy/job->zoom;
                
                double x_lim = (0.37*job->width-1)/job->zoom;
                double y_lim = (0.37*job->height-1)/job->zoom;
                
//              cout<<"Dpi: "<<job->dpi<<endl;
//              cout<<"View: "<<job->view<<endl;
//              cout<<"translation: "<<job->translation<<endl;
//              cout<<"devscale: "<<job->devscale<<endl;
//              cout<<"focus: "<<job->focus<<endl;
//              cout<<"scale: "<<job->scale<<endl;
                
                if(job->focus.x>= x_lim)
                        job->focus.x= x_lim;
                
                if(job->focus.y>= y_lim)
                        job->focus.y= y_lim;
        }
        
    return true;
}

gboolean DrawingareaScrollEvent(GtkWidget*widget,GdkEventScroll *event,gpointer user_data)
{
        if(event->type==GDK_SCROLL)
        {
                GVJ_t *job = (GVJ_t *)g_object_get_data(G_OBJECT(widget),"job");
                
                pointf pointer;
                pointer.x=event->x;
                pointer.y=event->y;
                
                if(event->direction==GDK_SCROLL_UP)
                        (job->callbacks->button_press)(job,4, pointer);
                else if(event->direction==GDK_SCROLL_DOWN)
                        (job->callbacks->button_press)(job,5, pointer);

                double x_lim = (0.37*job->width-1)/job->zoom;
                double y_lim = (0.37*job->height-1)/job->zoom;
                
                if(job->focus.x>= x_lim)
                        job->focus.x= x_lim;
                
                if(job->focus.y>= y_lim)
                        job->focus.y= y_lim;
        }
        
        return true;
}
                                                        
gboolean WindowDeleteEvent(GtkWidget*widget,GdkEvent*event,gpointer user_data)
{
    gtk_main_quit();
    return true;
}

gboolean DrawingareaConfigureEvent(GtkWidget*widget,GdkEventConfigure*event,gpointer user_data)
{
        GVJ_t *job;
        double zoom_to_fit;

/*FIXME - should allow for margins */
/*      - similar zoom_to_fit code exists in: */
/*      plugin/gtk/callbacks.c */
/*      plugin/xlib/gvdevice_xlib.c */
/*      lib/gvc/gvevent.c */

    job = (GVJ_t *)g_object_get_data(G_OBJECT(widget),"job");
        
    if (! job->has_been_rendered)
        {
                zoom_to_fit = MIN((double) event->width / (double) job->width,(double) event->height / (double) job->height);
        if (zoom_to_fit < 1.0) /* don't make bigger */
                        job->zoom *= zoom_to_fit;
    }else if(job->fit_mode)
        {
                zoom_to_fit = MIN((double) event->width / (double) job->width, (double) event->height / (double) job->height);
                job->zoom *= zoom_to_fit;
    }
    
    if ((unsigned int)event->width > job->width || (unsigned int)event->height > job->height)
                job->has_grown = TRUE;
    
        job->width = event->width;
    job->height = event->height;
    job->needs_refresh = TRUE;

    return FALSE;
}