31 lines
849 B
C++
31 lines
849 B
C++
// =====================================================================
|
|
// 第 2 课：按钮与回调 —— 老师完整答案
|
|
// =====================================================================
|
|
|
|
#include <FL/Fl.H>
|
|
#include <FL/Fl_Window.H>
|
|
#include <FL/Fl_Button.H>
|
|
#include <FL/Fl_Box.H>
|
|
|
|
Fl_Box *result_box;
|
|
|
|
void draw_callback(Fl_Widget *w, void *data) {
|
|
result_box->label("你点击了抽卡按钮！");
|
|
result_box->labelcolor(FL_RED);
|
|
}
|
|
|
|
int main() {
|
|
Fl_Window *window = new Fl_Window(400, 300, "抽卡世界 - 第2课");
|
|
|
|
Fl_Button *btn = new Fl_Button(130, 40, 140, 50, "抽一张！");
|
|
btn->labelsize(18);
|
|
btn->callback(draw_callback);
|
|
|
|
result_box = new Fl_Box(50, 130, 300, 100, "请点击按钮抽卡～");
|
|
result_box->labelsize(20);
|
|
|
|
window->end();
|
|
window->show();
|
|
return Fl::run();
|
|
}
|