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[STR New]
Link: http://www.fltk.org/str.php?L2409
Version: 1.3-feature
Link: http://www.fltk.org/str.php?L2409
Version: 1.3-feature
#include <stdio.h>
#include <sys/time.h>
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Button.H>
//
// Test how long the Fl_Group::clear() operation takes for 20k widgets -erco
//
struct timeval G_tvstart;
// Start timing an operation
void Start(void) {
gettimeofday(&G_tvstart, NULL);
}
// Return elapsed time so far in floating point seconds
double Elapsed() {
struct timeval tvnow;
gettimeofday(&tvnow, NULL);
long secoff = ( tvnow.tv_sec < G_tvstart.tv_sec ) ? tvnow.tv_sec :
G_tvstart.tv_sec;
long usecs1 = ( tvnow.tv_sec - secoff ) * 1000000 + tvnow.tv_usec;
long usecs2 = ( G_tvstart.tv_sec - secoff ) * 1000000 + G_tvstart.tv_usec;
// INHERENT BUG: IF TIME DIFFERENCE IS TOO LARGE, WE'LL SUFFER WRAPAROUND
return((double)(usecs1 - usecs2) / 1000000.0);
}
void Button_CB(Fl_Widget *w, void *d) {
void RebuildWindow(Fl_Window*); // prototype
Fl_Window *win = (Fl_Window*)d;
// TIME CLEAR OPERATION
Start();
win->clear();
double clear_elapsed = Elapsed();
fprintf(stderr, "--- Clear 20k buttons: took %.2F seconds\n",
clear_elapsed);
// TIME REBUILD BUTTONS
Start();
RebuildWindow(win);
double rebuild_elapsed = Elapsed();
fprintf(stderr, "--- Rebuild 20k buttons: took %.2F seconds\n",
rebuild_elapsed);
}
void RebuildWindow(Fl_Window *win) {
static int count = 0;
// BUILD 20K BUTTONS (different color each time)
win->begin();
for ( int t=0; t<20000; t++ ) {
int x = (t / 50) * 30;
int y = (t % 50) * 30;
Fl_Button *b = new Fl_Button(x,y,20,20,"X"); // extra button
outside group tests external focus
b->color(Fl_Color(count % 7 + 1));
b->callback(Button_CB, (void*)win);
}
win->end();
win->redraw();
++count;
}
int main(int argc, char *argv[]) {
Fl_Window *win = new Fl_Window(800,800,"Example");
RebuildWindow(win);
win->show();
return(Fl::run());
}
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