49 lines
1.1 KiB
C++
49 lines
1.1 KiB
C++
#include <FL/Fl.H>
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#include <FL/Fl_Box.H>
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#include <FL/Fl_Button.H>
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#include <FL/Fl_Window.H>
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#include <cstdio>
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#include <stdexcept>
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#include <string>
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#include <thread>
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using namespace std::chrono_literals;
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void cb(Fl_Widget *w, void *data) {
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auto box = (Fl_Box *)data;
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std::thread writer([=] {
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for (int i = 0; i != 1000; i++) {
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std::this_thread::sleep_for(10ms);
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char buf[100];
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snprintf(buf, 100, "Hello %d", i);
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Fl::lock();
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box->copy_label(buf);
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Fl::awake();
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Fl::unlock();
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}
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});
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writer.detach();
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std::thread reader([=] {
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while (true) {
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std::this_thread::sleep_for(1000ms);
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Fl::lock();
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printf("%s\n", box->label());
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fflush(stdout);
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Fl::awake();
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Fl::unlock();
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}
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});
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reader.detach();
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}
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int main() {
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Fl::lock();
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auto win = new Fl_Window(400, 300);
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auto box = new Fl_Box(0, 0, 400, 200, "Hello");
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auto but = new Fl_Button(160, 210, 80, 40, "Click");
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win->end();
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win->show();
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but->callback(cb, box);
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return Fl::run();
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} |