add some ncurses snippets

2026-03-21 17:20:57 +03:00 · 2020-12-21 16:58:32 +03:00
parent 1af9716058
commit dbe431a121
14 changed files with 899 additions and 0 deletions
--- a/Ncurses/mouse_menu.c
+++ b/Ncurses/mouse_menu.c
@@ -0,0 +1,132 @@
+#include <ncurses.h>
+#include <unistd.h>
+#include <string.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 choice);
+void report_choice(int mouse_x, int mouse_y, int *p_choice);
+
+int main()
+{	int c, choice = 0, highlight = 1;
+    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, "startx=%d, starty=%d", startx, starty);
+    refresh();
+    attroff(A_REVERSE);
+
+    /* Print the menu for the first time */
+    menu_win = newwin(HEIGHT, WIDTH, starty, startx);
+    keypad(menu_win, TRUE);
+    print_menu(menu_win, 1);
+    /* Get all the mouse events */
+    mousemask(ALL_MOUSE_EVENTS, NULL);
+    while(1)
+    {	c = wgetch(menu_win);
+        mvprintw(4, 1, "Character pressed is = %3d", c);
+        refresh();
+        switch(c)
+        {	case KEY_MOUSE:
+            if(getmouse(&event) == OK){	/* When the user clicks left mouse button */
+                mvprintw(5, 1, "x=%d, y=%d, bstate=0x%08x", event.x, event.y, event.bstate);
+                clrtoeol();
+                refresh();
+                if(event.bstate & (BUTTON1_PRESSED|BUTTON1_CLICKED))
+                {
+                    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]);
+                    clrtoeol();
+                }
+            }
+            break;
+            case KEY_UP:
+                refresh();
+                if(highlight == 1)
+                    highlight = n_choices;
+                else
+                    --highlight;
+                break;
+            case KEY_DOWN:
+                if(highlight == n_choices)
+                    highlight = 1;
+                else
+                    ++highlight;
+                break;
+            case 10:
+                choice = highlight;
+                mvprintw(2, 1, "Choice: %d", choice);
+                break;
+        }
+        print_menu(menu_win, highlight);
+        refresh();
+        if(choice == n_choices) break;
+    }
+end:
+    endwin();
+    return 0;
+}
+
+
+void print_menu(WINDOW *menu_win, int choice)
+{
+    int x, y, i;
+
+    x = 2;
+    y = 2;
+    box(menu_win, 0, 0);
+    for(i = 0; i < n_choices; ++i)
+    {	if(choice == 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 + (int)strlen(choices[choice]))
+        {	if(choice == n_choices - 1)
+                *p_choice = -1;
+            else
+                *p_choice = choice + 1;
+            break;
+        }
+}