[英]How can I make mouse support work for ncurses on OSX?
我目前已在 OSX 上編譯並運行本教程中的示例,發現捕獲鼠標事件不起作用。
我稍微修改了一下,使它更容易調試。 看起來 wgetch 永遠不會返回KEY_MOUSE
,而是在我單擊時返回一些任意字符。 我也相當確定這不是終端設置問題,因為 Vim 在完全相同的終端中捕獲鼠標點擊沒有問題。
我懷疑這個例子已經過時了。
有誰知道使用 ncurses 捕獲鼠標的現代方法?
下面是我修改后的代碼版本,用於上下文。
另外,我用g++ -std=c++17 -o curses_play curses_play.cc -lncurses
。
#include <ncurses.h>
#include <string.h>
#include <stdio.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()
{ int c, choice = 0;
WINDOW *menu_win;
MEVENT event;
/* Initialize curses */
initscr();
clear();
noecho();
cbreak(); //Line buffering disabled. pass on everything
/* Try to put the window in the middle of screen */
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);
/* Print the menu for the first time */
menu_win = newwin(HEIGHT, WIDTH, starty, startx);
print_menu(menu_win, 1);
/* Get all the mouse events */
mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION, NULL);
while(1)
{ c = wgetch(menu_win);
switch(c)
{ case KEY_MOUSE:
mvprintw(24, 0, "Found mouse!");
if(getmouse(&event) == OK)
{ /* When the user clicks left mouse button */
if(event.bstate & BUTTON1_PRESSED)
{ report_choice(event.x + 1, event.y + 1, &choice);
if(choice == -1) //Exit chosen
goto end;
mvprintw(22, 1, "Choice made is : %d String Chosen is \"%10s\"", choice, choices[choice - 1]);
refresh();
}
}
print_menu(menu_win, choice);
break;
default:
mvprintw(24, 0, "Charcter pressed is = %3d Hopefully it can be printed as '%c'", c, c);
refresh();
break;
}
}
end:
endwin();
return 0;
}
void print_menu(WINDOW *menu_win, int highlight)
{
int x, y, i;
x = 2;
y = 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);
}
/* Report the choice according to mouse position */
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;
}
}
我讓它工作了,我不確定哪個特定的調整是重要的調整(我改變了大約十幾個東西)。 我也有一堆我沒有去掉的儀器
希望這足以讓你繼續前進。
/*
brew install ncurses
clang++ -Weverything -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-padded -Wno-c99-compat -Wno-poison-system-directories -pedantic -fsanitize=undefined,null -std=c++17 -cxx-isystem /usr/local/include -o Merlin2011 Merlin2011.cpp -lncurses
./Merlin2011
*/
#include <ncurses.h>
#include <clocale>
#include <cstring>
#define WIDTH 30
#define HEIGHT 10
static int startx = 0;
static int starty = 0;
static char const* choices[] = {
"Choice 1", "Choice 2", "Choice 3", "Choice 4", "Exit",
};
static int n_choices = sizeof(choices) / sizeof(char*);
static void print_menu(WINDOW* menu_win, int highlight);
static void report_choice(int mouse_x, int mouse_y, int* p_choice);
static
char sane(int c) {
if (c > ' ' && c <= '~')
return static_cast<char>(c);
return ' ';
}
int main() {
int choice = 0;
WINDOW* menu_win;
setlocale(LC_ALL, "");
/* Initialize curses */
initscr();
clear();
noecho();
cbreak(); // Line buffering disabled. pass on everything
keypad(stdscr, TRUE);
halfdelay(1);
/* Try to put the window in the middle of screen */
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);
/* Print the menu for the first time */
menu_win = newwin(HEIGHT, WIDTH, starty, startx);
scrollok(menu_win, TRUE);
keypad(menu_win, TRUE);
print_menu(menu_win, 1);
/* Get all the mouse events */
//auto mm_success = mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION, nullptr);
/* Get just just the click event. */
mmask_t mousemask_setting = NCURSES_BUTTON_CLICKED;
auto mm_success = mousemask(mousemask_setting, nullptr);
if (!mm_success) {
mvprintw(22, 1, "FAIL: mousemask");
} else if (mm_success == mousemask_setting) {
mvprintw(22, 1, "SUCCESS: mousemask");
} else {
mvprintw(22, 1, "Partial success: mousemask %x of %x", mm_success, mousemask_setting);
}
refresh();
bool loop{ true };
while (loop) {
auto c = wgetch(menu_win);
switch (c) {
case KEY_MOUSE: {
MEVENT event;
mvprintw(20, 1, "Found mouse!");
if (getmouse(&event) == OK) { /* When the user clicks left mouse button */
mvprintw(20, 1, "Found mouse! %3d %3d %d", event.x, event.y, event.bstate);
//if (event.bstate & BUTTON1_PRESSED) { ... }
if (event.bstate & NCURSES_BUTTON_CLICKED) {
mvprintw(20, 1, "Found mouse! %3d %3d MOUSE_CLICK", event.x, event.y);
report_choice(event.x + 1, event.y + 1, &choice);
if (choice == -1) { // Exit chosen
loop = false;
break;
}
mvprintw(22, 1, "Choice made is : %d String Chosen is \"%10s\"", choice, choices[choice - 1]);
refresh();
}
}
print_menu(menu_win, choice);
} break;
case ERR: {
static int count = 0;
++count;
mvprintw(21, 0, "Nothing happened (%d).", count);
refresh();
} break;
default: {
static int i = 0;
mvprintw(24+i, 0, "Key pressed is = %3d '%c'", c, sane(c));
if (++i == 30)
i = 0;
mvprintw(24+i, 0, "-------------------------");
refresh();
if (c == 'q')
loop = false;
} break;
}
}
endwin();
}
void print_menu(WINDOW* menu_win, int highlight) {
int x, y, i;
x = 2;
y = 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);
}
/* Report the choice according to mouse position */
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;
}
}
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