void PieChart::draw_series_double() {
double *dataArray = (double *) data_array;
double total=0;
double theta1,theta2;
for (int i = 0; i < data_num; i++)
total+=(double)(dataArray[i]);
if(total<1E-9)total=1;
theta2=0.0;
for (int i = 0; i < data_num; i++) {
theta1=theta2;
theta2+=6.2832*(double)dataArray[i]/total;
draw_pie(theta1,theta2,i);
}
theta1=0.0;
for (int i = 0; i <= data_num; i++) {
vga_back.thick_line(
centerx, centery,
centerx+(int)(radius*cos(theta1)), centery+(int)(radius*sin(theta1)),
vga_back.translate_color(V_GRAY-5));
theta1+=6.2832*(double)dataArray[i]/total;
}
}
static gboolean
countdown_expose_cb(GtkWidget *pie, GdkEventExpose *event,
WindowData *windata)
{
cairo_t *context;
cairo_surface_t *surface;
cairo_t *cr;
context = gdk_cairo_create(pie->window);
cairo_set_operator(context, CAIRO_OPERATOR_SOURCE);
surface = cairo_surface_create_similar(cairo_get_target(context),
CAIRO_CONTENT_COLOR_ALPHA,
pie->allocation.width,
pie->allocation.height);
cr = cairo_create(surface);
cairo_translate (cr, -pie->allocation.x, -pie->allocation.y);
fill_background (pie, windata, cr);
cairo_translate (cr, pie->allocation.x, pie->allocation.y);
draw_pie (pie, windata, cr);
cairo_destroy(cr);
cairo_set_source_surface(context, surface, 0, 0);
cairo_paint(context);
cairo_surface_destroy(surface);
cairo_destroy(context);
return TRUE;
}
//---------- Begin of function PieChart::draw_series_int ------------//
//!
void PieChart::draw_series_int() {
int *dataArray = (int *) data_array;
long total=0;
double theta1,theta2;
for (int i = 0; i < data_num; i++)
total+=(long)(dataArray[i]);
if(total<1E-9)total=1;
theta2=0.0;
for (int i = 0; i < data_num; i++) {
theta1=theta2;
theta2+=6.2832*(double)dataArray[i]/total;
draw_pie(theta1,theta2,i);
if((theta1!=theta2)
&&(fabs(theta2-theta1-6.2832)>1e-9)) {
vga_back.thick_line(
centerx,
centery,
centerx+(int)(radius*cos(theta1)),
centery+(int)(radius*sin(theta1)),
vga_back.translate_color(V_GRAY-5));
vga_back.thick_line(
centerx,
centery,
centerx+(int)(radius*cos(theta2)),
centery+(int)(radius*sin(theta2)),
vga_back.translate_color(V_GRAY-5));
}
}
}