#include <QtGui>#include <stdio.h>#include <stdlib.h>#include <ctype.h>#include <list>#include "../../svm.h"using namespace std;#define DEFAULT_PARAM "-t 2 -c 100"#define XLEN 500#define YLEN 500QRgb colors[] ={	qRgb(0,0,0),	qRgb(0,120,120),	qRgb(120,120,0),	qRgb(120,0,120),	qRgb(0,200,200),	qRgb(200,200,0),	qRgb(200,0,200)};class SvmToyWindow : public QWidget{Q_OBJECTpublic:	SvmToyWindow();	~SvmToyWindow();protected:	virtual void mousePressEvent( QMouseEvent* );	virtual void paintEvent( QPaintEvent* );private:	QPixmap buffer;	QPixmap icon1;	QPixmap icon2;	QPixmap icon3;	QPushButton button_change_icon;	QPushButton button_run;	QPushButton button_clear;	QPushButton button_save;	QPushButton button_load;	QLineEdit input_line;	QPainter buffer_painter;	struct point {		double x, y;		signed char value;	};	list<point> point_list;	int current_value;	const QPixmap& choose_icon(int v)	{		if(v==1) return icon1;		else if(v==2) return icon2;		else return icon3;	}	void clear_all()	{		point_list.clear();		buffer.fill(Qt::black);		repaint();	}	void draw_point(const point& p)	{		const QPixmap& icon = choose_icon(p.value);		buffer_painter.drawPixmap((int)(p.x*XLEN),(int)(p.y*YLEN),icon);		repaint();	}	void draw_all_points()	{		for(list<point>::iterator p = point_list.begin(); p != point_list.end();p++)			draw_point(*p);		}private slots: 	void button_change_icon_clicked()	{		++current_value;		if(current_value > 3) current_value = 1;		button_change_icon.setIcon(choose_icon(current_value));	}	void button_run_clicked()	{		// 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 = input_line.text().toAscii().constData();		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, &param);			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));			}						buffer_painter.setPen(colors[0]);			buffer_painter.drawLine(0,0,0,YLEN-1);			int p = (int)(param.p * YLEN);			for(i = 1; i < XLEN; i++)			{				buffer_painter.setPen(colors[0]);				buffer_painter.drawLine(i,0,i,YLEN-1);							buffer_painter.setPen(colors[5]);				buffer_painter.drawLine(i-1,j[i-1],i,j[i]);								if(param.svm_type == EPSILON_SVR)				{					buffer_painter.setPen(colors[2]);					buffer_painter.drawLine(i-1,j[i-1]+p,i,j[i]+p);					buffer_painter.setPen(colors[2]);					buffer_painter.drawLine(i-1,j[i-1]-p,i,j[i]-p);				}			}			svm_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, &param);			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;					buffer_painter.setPen(colors[(int)d]);					buffer_painter.drawPoint(i,j);			}			svm_destroy_model(model);			delete[] x_space;			delete[] prob.x;			delete[] prob.y;		}		free(param.weight_label);		free(param.weight);		draw_all_points();	}	void button_clear_clicked()	{		clear_all();	}	void button_save_clicked()	{		QString filename = QFileDialog::getSaveFileName();		if(!filename.isNull())		{			FILE *fp = fopen(filename.toAscii().constData(),"w");			if(fp)			{				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);			}		}	}	void button_load_clicked()	{		QString filename = QFileDialog::getOpenFileName();		if(!filename.isNull())		{			FILE *fp = fopen(filename.toAscii().constData(),"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)						break;																		point p = {x,y,v};					point_list.push_back(p);				}				fclose(fp);				draw_all_points();			}						}			}};#include "svm-toy.moc"SvmToyWindow::SvmToyWindow():button_change_icon(this),button_run("Run",this),button_clear("Clear",this),button_save("Save",this),button_load("Load",this),input_line(this),current_value(1){	buffer = QPixmap(XLEN,YLEN);	buffer.fill(Qt::black);	buffer_painter.begin(&buffer);	QObject::connect(&button_change_icon, SIGNAL(clicked()), this,			 SLOT(button_change_icon_clicked()));	QObject::connect(&button_run, SIGNAL(clicked()), this,			 SLOT(button_run_clicked()));	QObject::connect(&button_clear, SIGNAL(clicked()), this,			 SLOT(button_clear_clicked()));	QObject::connect(&button_save, SIGNAL(clicked()), this,			 SLOT(button_save_clicked()));	QObject::connect(&button_load, SIGNAL(clicked()), this,			 SLOT(button_load_clicked()));	QObject::connect(&input_line, SIGNAL(returnPressed()), this,			 SLOT(button_run_clicked()));  	// don't blank the window before repainting	setAttribute(Qt::WA_NoBackground);  	icon1 = QPixmap(4,4);	icon2 = QPixmap(4,4);	icon3 = QPixmap(4,4);			QPainter painter;	painter.begin(&icon1);	painter.fillRect(0,0,4,4,QBrush(colors[4]));	painter.end();	painter.begin(&icon2);	painter.fillRect(0,0,4,4,QBrush(colors[5]));	painter.end();	painter.begin(&icon3);	painter.fillRect(0,0,4,4,QBrush(colors[6]));	painter.end();	button_change_icon.setGeometry( 0, YLEN, 50, 25 );	button_run.setGeometry( 50, YLEN, 50, 25 );	button_clear.setGeometry( 100, YLEN, 50, 25 );	button_save.setGeometry( 150, YLEN, 50, 25);	button_load.setGeometry( 200, YLEN, 50, 25);	input_line.setGeometry( 250, YLEN, 250, 25);		input_line.setText(DEFAULT_PARAM);	button_change_icon.setIcon(icon1);}SvmToyWindow::~SvmToyWindow(){	buffer_painter.end();}void SvmToyWindow::mousePressEvent( QMouseEvent* event ){	point p = {(double)event->x()/XLEN, (double)event->y()/YLEN, current_value};	point_list.push_back(p);	draw_point(p);}void SvmToyWindow::paintEvent( QPaintEvent* ){	// copy the image from the buffer pixmap to the window	QPainter p(this);	p.drawPixmap(0, 0, buffer);}int main( int argc, char* argv[] ){	QApplication myapp( argc, argv );	SvmToyWindow* mywidget = new SvmToyWindow();	mywidget->setGeometry( 100, 100, XLEN, YLEN+25 );	mywidget->show();	return myapp.exec();}