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Adding FL_BEFORE_MENU event to classes derived from Fl_Menu_

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This commit is contained in:
Matthias Melcher
2025-03-29 23:36:09 +01:00
parent b7189192e2
commit 5dd1062df5
13 changed files with 69 additions and 15 deletions
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2
test/color_chooser.cxx
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@@ -90,7 +90,7 @@ public:
Image_Box(int x, int y, int w, int h, const char *label = nullptr)
: Fl_Box(x, y, w, h, label) { }
int handle(int event) {
if (event == FL_TOOLTIP_EVENT) {
if (event == FL_BEFORE_TOOLTIP) {
const char *color_name_lut[] = { "blue", "green", "black", "red" };
int quadrant = (Fl::event_x() < x()+w()/2) + 2*(Fl::event_y() < y()+h()/2);
char buf[80];

31
test/menubar.cxx
View File

@@ -210,7 +210,7 @@ void menu_location_cb(Fl_Widget* w, void* data)
if (((Fl_Choice*)w)->value() == 1) { // switch to system menu bar
menubar->hide();
const Fl_Menu_Item *menu = menubar->menu();
smenubar = new Fl_Sys_Menu_Bar(0,0,0,30);
smenubar = new Fl_Sys_Menu_Bar(0,0,0,30);
smenubar->menu(menu);
smenubar->callback(test_cb);
}
@@ -236,6 +236,30 @@ void about_cb(Fl_Widget*, void*) {
fl_message("The menubar test app.");
}
class Dynamic_Choice: public Fl_Choice {
public:
Dynamic_Choice(int x, int y, int w, int h, const char *label=nullptr)
: Fl_Choice(x, y, w, h, label) { }
int handle(int event) {
static int flip_flop = 0;
if (event == FL_BEFORE_MENU) {
// The following line is legal because we used `copy()` to create a
// writable copy of the menu array when creating this Choice.
Fl_Menu_Item *mi = const_cast<Fl_Menu_Item*>(menu());
if (flip_flop == 1) {
mi[7].flags |= FL_MENU_INACTIVE;
mi[8].flags &= ~FL_MENU_INACTIVE;
flip_flop = 0;
} else {
mi[7].flags &= ~FL_MENU_INACTIVE;
mi[8].flags |= FL_MENU_INACTIVE;
flip_flop = 1;
}
}
return Fl_Choice::handle(event);
}
};
int main(int argc, char **argv) {
for (int i=0; i<99; i++) {
char buf[100];
@@ -256,7 +280,10 @@ int main(int argc, char **argv) {
mb1.tooltip("this is a menu button");
mb1.callback(test_cb);
menus[1] = &mb1;
Fl_Choice ch(300,100,80,25,"&choice:"); ch.menu(pulldown);
Dynamic_Choice ch(300,100,80,25,"&choice:");
ch.copy(pulldown);
ch.add("Flip");
ch.add("Flop");
ch.tooltip("this is a choice menu");
ch.callback(test_cb);
menus[2] = &ch;