#include <gtk/gtk.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <list>
#include "callbacks.h"
#include "interface.h"
#include "../../svm.h"
using namespace std;
#define DEFAULT_PARAM "-t 2 -c 100"
#define XLEN 500
#define YLEN 500
GdkColor colors[] =
{
{0,0,0,0},
{0,0,120<<8,120<<8},
{0,120<<8,120<<8,0},
{0,120<<8,0,120<<8},
{0,0,200<<8,200<<8},
{0,200<<8,200<<8,0},
{0,200<<8,0,200<<8},
};
GdkGC *gc;
GdkPixmap *pixmap;
extern "C" GtkWidget *draw_main;
GtkWidget *draw_main;
extern "C" GtkWidget *entry_option;
GtkWidget *entry_option;
typedef struct {
double x, y;
signed char value;
} point;
list<point> point_list;
int current_value = 1;
extern "C" void svm_toy_initialize()
{
gboolean success[7];
gdk_colormap_alloc_colors(
gdk_colormap_get_system(),
colors,
7,
FALSE,
TRUE,
success);
gc = gdk_gc_new(draw_main->window);
pixmap = gdk_pixmap_new(draw_main->window,XLEN,YLEN,-1);
gdk_gc_set_foreground(gc,&colors[0]);
gdk_draw_rectangle(pixmap,gc,TRUE,0,0,XLEN,YLEN);
gtk_entry_set_text(GTK_ENTRY(entry_option),DEFAULT_PARAM);
}
void redraw_area(GtkWidget* widget, int x, int y, int w, int h)
{
gdk_draw_pixmap(widget->window,
gc,
pixmap,
x,y,x,y,w,h);
}
void draw_point(const point& p)
{
gdk_gc_set_foreground(gc,&colors[p.value+3]);
gdk_draw_rectangle(pixmap, gc, TRUE,int(p.x*XLEN),int(p.y*YLEN),4,4);
gdk_draw_rectangle(draw_main->window, gc, TRUE,int(p.x*XLEN),int(p.y*YLEN),4,4);
}
void draw_all_points()
{
for(list<point>::iterator p = point_list.begin(); p != point_list.end();p++)
draw_point(*p);
}
void clear_all()
{
point_list.clear();
gdk_gc_set_foreground(gc,&colors[0]);
gdk_draw_rectangle(pixmap,gc,TRUE,0,0,XLEN,YLEN);
redraw_area(draw_main,0,0,XLEN,YLEN);
}
void
on_button_change_clicked (GtkButton *button,
gpointer user_data)
{
++current_value;
if(current_value > 3) current_value = 1;
}
void
on_button_run_clicked (GtkButton *button,
gpointer user_data)
{
// guard
if(point_list.empty()) return;
svm_parameter param;
int i,j;
// default values
param.svm_type = C_SVC;
param.kernel_type = RBF;
param.degree = 3;
param.gamma = 0;
param.coef0 = 0;
param.nu = 0.5;
param.cache_size = 100;
param.C = 1;
param.eps = 1e-3;
param.p = 0.1;
param.shrinking = 1;
param.probability = 0;
param.nr_weight = 0;
param.weight_label = NULL;
param.weight = NULL;
// parse options
const char *p = gtk_entry_get_text(GTK_ENTRY(entry_option));
while (1) {
while (*p && *p != '-')
p++;
if (*p == '\0')
break;
p++;
switch (*p++) {
case 's':
param.svm_type = atoi(p);
break;
case 't':
param.kernel_type = atoi(p);
break;
case 'd':
param.degree = atoi(p);
break;
case 'g':
param.gamma = atof(p);
break;
case 'r':
param.coef0 = atof(p);
break;
case 'n':
param.nu = atof(p);
break;
case 'm':
param.cache_size = atof(p);
break;
case 'c':
param.C = atof(p);
break;
case 'e':
param.eps = atof(p);
break;
case 'p':
param.p = atof(p);
break;
case 'h':
param.shrinking = atoi(p);
break;
case 'b':
param.probability = atoi(p);
break;
case 'w':
++param.nr_weight;
param.weight_label = (int *)realloc(param.weight_label,sizeof(int)*param.nr_weight);
param.weight = (double *)realloc(param.weight,sizeof(double)*param.nr_weight);
param.weight_label[param.nr_weight-1] = atoi(p);
while(*p && !isspace(*p)) ++p;
param.weight[param.nr_weight-1] = atof(p);
break;
}
}
// build problem
svm_problem prob;
prob.l = point_list.size();
prob.y = new double[prob.l];
if(param.kernel_type == PRECOMPUTED)
{
}
else if(param.svm_type == EPSILON_SVR ||
param.svm_type == NU_SVR)
{
if(param.gamma == 0) param.gamma = 1;
svm_node *x_space = new svm_node[2 * prob.l];
prob.x = new svm_node *[prob.l];
i = 0;
for (list <point>::iterator q = point_list.begin(); q != point_list.end(); q++, i++)
{
x_space[2 * i].index = 1;
x_space[2 * i].value = q->x;
x_space[2 * i + 1].index = -1;
prob.x[i] = &x_space[2 * i];
prob.y[i] = q->y;
}
// build model & classify
svm_model *model = svm_train(&prob, ¶m);
svm_node x[2];
x[0].index = 1;
x[1].index = -1;
int *j = new int[XLEN];
for (i = 0; i < XLEN; i++)
{
x[0].value = (double) i / XLEN;
j[i] = (int)(YLEN*svm_predict(model, x));
}
gdk_gc_set_foreground(gc,&colors[0]);
gdk_draw_line(pixmap,gc,0,0,0,YLEN-1);
gdk_draw_line(draw_main->window,gc,0,0,0,YLEN-1);
int p = (int)(param.p * YLEN);
for(i = 1; i < XLEN; i++)
{
gdk_gc_set_foreground(gc,&colors[0]);
gdk_draw_line(pixmap,gc,i,0,i,YLEN-1);
gdk_draw_line(draw_main->window,gc,i,0,i,YLEN-1);
gdk_gc_set_foreground(gc,&colors[5]);
gdk_draw_line(pixmap,gc,i-1,j[i-1],i,j[i]);
gdk_draw_line(draw_main->window,gc,i-1,j[i-1],i,j[i]);
if(param.svm_type == EPSILON_SVR)
{
gdk_gc_set_foreground(gc,&colors[2]);
gdk_draw_line(pixmap,gc,i-1,j[i-1]+p,i,j[i]+p);
gdk_draw_line(draw_main->window,gc,i-1,j[i-1]+p,i,j[i]+p);
gdk_gc_set_foreground(gc,&colors[2]);
gdk_draw_line(pixmap,gc,i-1,j[i-1]-p,i,j[i]-p);
gdk_draw_line(draw_main->window,gc,i-1,j[i-1]-p,i,j[i]-p);
}
}
svm_free_and_destroy_model(&model);
delete[] j;
delete[] x_space;
delete[] prob.x;
delete[] prob.y;
}
else
{
if(param.gamma == 0) param.gamma = 0.5;
svm_node *x_space = new svm_node[3 * prob.l];
prob.x = new svm_node *[prob.l];
i = 0;
for (list <point>::iterator q = point_list.begin(); q != point_list.end(); q++, i++)
{
x_space[3 * i].index = 1;
x_space[3 * i].value = q->x;
x_space[3 * i + 1].index = 2;
x_space[3 * i + 1].value = q->y;
x_space[3 * i + 2].index = -1;
prob.x[i] = &x_space[3 * i];
prob.y[i] = q->value;
}
// build model & classify
svm_model *model = svm_train(&prob, ¶m);
svm_node x[3];
x[0].index = 1;
x[1].index = 2;
x[2].index = -1;
for (i = 0; i < XLEN; i++)
for (j = 0; j < YLEN; j++) {
x[0].value = (double) i / XLEN;
x[1].value = (double) j / YLEN;
double d = svm_predict(model, x);
if (param.svm_type == ONE_CLASS && d<0) d=2;
gdk_gc_set_foreground(gc,&colors[(int)d]);
gdk_draw_point(pixmap,gc,i,j);
gdk_draw_point(draw_main->window,gc,i,j);
}
svm_free_and_destroy_model(&model);
delete[] x_space;
delete[] prob.x;
delete[] prob.y;
}
free(param.weight_label);
free(param.weight);
draw_all_points();
}
void
on_button_clear_clicked (GtkButton *button,
gpointer user_data)
{
clear_all();
}
void
on_window1_destroy (GtkObject *object,
gpointer user_data)
{
gtk_exit(0);
}
gboolean
on_draw_main_button_press_event (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data)
{
point p = {(double)event->x/XLEN, (double)event->y/YLEN, current_value};
point_list.push_back(p);
draw_point(p);
return FALSE;
}
gboolean
on_draw_main_expose_event (GtkWidget *widget,
GdkEventExpose *event,
gpointer user_data)
{
redraw_area(widget,
event->area.x, event->area.y,
event->area.width, event->area.height);
return FALSE;
}
GtkWidget *fileselection;
static enum { SAVE, LOAD } fileselection_flag;
void show_fileselection()
{
fileselection = create_fileselection();
gtk_signal_connect_object(
GTK_OBJECT(GTK_FILE_SELECTION(fileselection)->ok_button),
"clicked", GTK_SIGNAL_FUNC(gtk_widget_destroy),
(GtkObject *) fileselection);
gtk_signal_connect_object (GTK_OBJECT
(GTK_FILE_SELECTION(fileselection)->cancel_button),
"clicked", GTK_SIGNAL_FUNC(gtk_widget_destroy),
(GtkObject *) fileselection);
gtk_widget_show(fileselection);
}
void
on_button_save_clicked (GtkButton *button,
gpointer user_data)
{
fileselection_flag = SAVE;
show_fileselection();
}
void
on_button_load_clicked (GtkButton *button,
gpointer user_data)
{
fileselection_flag = LOAD;
show_fileselection();
}
void
on_filesel_ok_clicked (GtkButton *button,
gpointer user_data)
{
gtk_widget_hide(fileselection);
const char *filename = gtk_file_selection_get_filename(GTK_FILE_SELECTION(fileselection));
if(fileselection_flag == SAVE)
{
FILE *fp = fopen(filename,"w");
const char *p = gtk_entry_get_text(GTK_ENTRY(entry_option));
const char* svm_type_str = strstr(p, "-s ");
int svm_type = C_SVC;
if(svm_type_str != NULL)
sscanf(svm_type_str, "-s %d", &svm_type);
if(fp)
{
if(svm_type == EPSILON_SVR || svm_type == NU_SVR)
{
for(list<point>::iterator p = point_list.begin(); p != point_list.end();p++)
fprintf(fp,"%f 1:%f\n", p->y, p->x);
}
else
{
for(list<point>::iterator p = point_list.begin(); p != point_list.end();p++)
fprintf(fp,"%d 1:%f 2:%f\n", p->value, p->x, p->y);
}
fclose(fp);
}
}
else if(fileselection_flag == LOAD)
{
FILE *fp = fopen(filename,"r");
if(fp)
{
clear_all();
char buf[4096];
while(fgets(buf,sizeof(buf),fp))
{
int v;
double x,y;
if(sscanf(buf,"%d%*d:%lf%*d:%lf",&v,&x,&y)==3)
{
point p = {x,y,v};
point_list.push_back(p);
}
else if(sscanf(buf,"%lf%*d:%lf",&y,&x)==2)
{
point p = {x,y,current_value};
point_list.push_back(p);
}
else
break;
}
fclose(fp);
draw_all_points();
}
}
}
void
on_fileselection_destroy (GtkObject *object,
gpointer user_data)
{
}
void
on_filesel_cancel_clicked (GtkButton *button,
gpointer user_data)
{
}