PDA

View Full Version : using the mouse with ncurses



dsharp
12-24-2003, 02:34 PM
Hello. I am having a problem using the mouse with ncurses. I am 100% sure that my code is correct and it compiles fine. When I run my program it is not picking up the mouse events. I first tried running the program in Konsole, then I tried xterm, and finally I tried aterm but it's still not working. Does anyone have any idea why the mouse isn't working? Or where I might find the answer?
Note: I compiled with gcc v3.2.2 and I'm using ncurses v5.2

Thank you for your time.

-=SoKrA=-
12-24-2003, 02:41 PM
Post your code for picking up the mouse events. It might be a logic problem. Have you tried with a `real' console? ie. Have you tried it outside X? Mind you, the mouse may not be intialized, not sure...

dsharp
12-24-2003, 05:35 PM
The following code is from the ncurses programming how-to and it doesn't even work.


#include <ncurses.h>

#define WIDTH 30
#define HEIGHT 10

int startx = 0;
int starty = 0;

char *choices[] = {
"Choice 1",
"Choice 2",
"Choice 3",
"Choice 4",
"Exit" };

int n_choices = sizeof(choices) / sizeof(char *);

void print_menu(WINDOW *menu_win, int highlight);
void report_choice(int mouse_x, int mouse_y, int *p_choice);

int main(void) {
int c, choice = 0;
WINDOW *menu_win;
MEVENT *event;

initscr();
clear();
noecho();
cbreak();

startx = (80 - WIDTH) / 2;
starty = (24 - HEIGHT) / 2;

attron(A_REVERSE);
mvprintw(23, 1, "Click on exit to quit (Works best in a virtual console)");
refresh();
attroff(A_REVERSE);

menu_win = newwin(HEIGHT, WIDTH, starty, startx);
print_menu(menu_win, 1);

mousemask(ALL_MOUSE_EVENTS, NULL);

while(1) {
c = wgetch(menu_win);
switch(c) {
case KEY_MOUSE:
if(getmouse(event) == OK) {
if(event->bstate & BUTTON1_PRESSED) {
report_choice(event->x + 1, event->y + 1, &choice);
if(choice == -1)
goto end;
mvprintw(22, 1, "Choice made is: %d String chosen is \"%10s\"", choice,
choices[choice - 1]);
refresh();
}
}
print_menu(menu_win, choice);
break;
}
}
end:
endwin();
return 0;
}

void print_menu(WINDOW *menu_win, int highlight) {
int x, y, i;
y = 2;
x = 2;
box(menu_win, 0, 0);
for(i = 0; i < n_choices; ++i) {
if(highlight == i + 1) {
wattron(menu_win, A_REVERSE);
mvwprintw(menu_win, y, x, "%s", choices[i]);
wattroff(menu_win, A_REVERSE);
}
else
mvwprintw(menu_win, y, x, "%s", choices[i]);
++y;
}
wrefresh(menu_win);
}

void report_choice(int mouse_x, int mouse_y, int *p_choice) {
int i, j, choice;
i = startx + 2;
j = starty + 3;

for(choice = 0; choice < n_choices; ++choice) {
if(mouse_y == j + choice && mouse_x >= i && mouse_x <= i + strlen(choices[choice])) {
if(choice == n_choices - 1) {
*p_choice = -1;
}
else
*p_choice = choice + 1;
break;
}
}
}

That's not my code above but it should work, but it doesn't. And I have tried it from a virtual console. Maybe there is something wrong with my ncurses installation. Anyways, thanks for the reply.