Greg Ercolano wrote:
> In your final app, you would likely have a 'calendar open' button
> the user presses, and you can use the Fl::event_x_root() and
> Fl::event_y_root() to get the user's mouse position at the time
> of the event, and position() your calendar window there before
> show()ing it, so that it opens where the user's mouse is.
> [..]
> Or, you may want to set things up so that if the user moves off
> the calendar window, it hide()s automatically, similar to the
> way a popup menu disappears if you move off of it. In such a case
> you might even want to make the calendar window borderless..
Here's a proof of that concept, I was curious.
Seems like a good way to go:
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Group.H>
#include <stdio.h>
#include <string.h>
//
// Demonstrate a calendar popup
// 1.0 erco 4/18/07
//
class Calendar : public Fl_Double_Window {
static void DayClick_CB(Fl_Widget*, void *o) {
Calendar *cal = (Calendar*)o;
cal->hide(); // hide when user
clicks a day..
}
public:
Calendar(int X, int Y) : Fl_Double_Window(X, Y, 280, 180) {
color(FL_WHITE);
border(0);
// Create fake calendar
int bw = w()/7;
int bh = h()/4;
char day_str[10];
for ( int day=0; day<28; day++ ) {
sprintf(day_str, "%d", day+1);
Fl_Button *b = new Fl_Button((day % 7) * bw, (day / 7) * bh, bw,
bh);
b->callback(DayClick_CB, (void*)this); // when user clicks a
day
b->copy_label(day_str); // day label
b->box(FL_BORDER_BOX);
b->color(FL_WHITE);
b->align(FL_ALIGN_INSIDE|FL_ALIGN_LEFT|FL_ALIGN_TOP);
}
end();
}
int handle(int e) {
if ( e == FL_LEAVE ) hide(); // hide if mouse
leaves window
return(Fl_Double_Window::handle(e));
}
};
Calendar *G_cal = 0;
void Cal_CB(Fl_Widget*, void*) {
G_cal->position(Fl::event_x_root()-4, Fl::event_y_root()-4);
G_cal->show();
}
int main() {
Fl_Double_Window win(300, 300);
Fl_Button* b = new Fl_Button(50, 50, 100, 20, "Cal");
b->callback(Cal_CB);
win.end();
win.show();
G_cal = new Calendar(300, 300);
return(Fl::run());
}
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