1 files changed, 122 insertions, 0 deletions
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..6f646ec
--- /dev/null
+++ b/main.c
@@ -0,0 +1,122 @@
+#include <curses.h>
+#include <stdlib.h>
+
+#define MAIN_PANEL_WIDTH         100
+#define MAIN_PANEL_HEIGHT        41
+#define INSTRUCTION_PANEL_WIDTH  32
+#define INSTRUCTION_PANEL_HEIGHT 43
+#define MESSAGE_PANEL_WIDTH      100
+#define MESSAGE_PANEL_HEIGHT     3
+
+WINDOW *create_newwin(int height, int width, int starty, int startx)
+{
+    WINDOW *local_win = newwin(height, width, starty, startx);
+    box(local_win, 0, 0);
+    wrefresh(local_win);
+
+    return local_win;
+}
+
+void destroy_win(WINDOW *local_win)
+{
+    wborder(local_win, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ');
+    wrefresh(local_win);
+    delwin(local_win);
+}
+
+int main(void)
+{
+    initscr(); // initialize curses
+
+    // exit on unsupported consoles
+    if (LINES < INSTRUCTION_PANEL_HEIGHT ||
+        COLS < MAIN_PANEL_WIDTH + INSTRUCTION_PANEL_WIDTH || !has_colors()) {
+        endwin();
+        fprintf(
+            stderr,
+            "a color terminal is required with at least %dx%d characters\n",
+            INSTRUCTION_PANEL_WIDTH + MAIN_PANEL_WIDTH, INSTRUCTION_PANEL_HEIGHT
+        );
+        exit(1);
+    }
+
+    // configure curses if startup was successful
+    raw();                // disable line buffering
+    keypad(stdscr, TRUE); // enable reading function keys
+    noecho();             // don't print input
+    curs_set(0);          // disable the cursor
+    start_color();        // enable colours
+
+    int starty = 12;
+    int startx = 40;
+    init_pair(1, COLOR_WHITE, COLOR_BLACK);
+    wattron(stdscr, COLOR_PAIR(1));
+    refresh();
+
+    // create the windows
+    WINDOW *inst = create_newwin(
+        INSTRUCTION_PANEL_HEIGHT, INSTRUCTION_PANEL_WIDTH,
+        (LINES - INSTRUCTION_PANEL_HEIGHT) / 2,
+        (COLS - MAIN_PANEL_WIDTH - INSTRUCTION_PANEL_WIDTH) / 2 +
+            MAIN_PANEL_WIDTH - 1
+    );
+    WINDOW *msgs = create_newwin(
+        MESSAGE_PANEL_HEIGHT, MESSAGE_PANEL_WIDTH,
+        (LINES - MAIN_PANEL_HEIGHT - MESSAGE_PANEL_HEIGHT) / 2 +
+            MAIN_PANEL_HEIGHT,
+        (COLS - MESSAGE_PANEL_WIDTH - INSTRUCTION_PANEL_WIDTH) / 2
+    );
+    WINDOW *main_win = create_newwin(
+        MAIN_PANEL_HEIGHT, MAIN_PANEL_WIDTH,
+        (LINES - MAIN_PANEL_HEIGHT - MESSAGE_PANEL_HEIGHT) / 2 + 1,
+        (COLS - MAIN_PANEL_WIDTH - INSTRUCTION_PANEL_WIDTH) / 2
+    );
+
+    mvwprintw(inst, 1, 2, "h - move left");
+    mvwprintw(inst, 2, 2, "j - move down");
+    mvwprintw(inst, 3, 2, "k - move up");
+    mvwprintw(inst, 4, 2, "l - move right");
+    wrefresh(inst);
+
+    mvwprintw(msgs, 1, 1, "TODO: put messages here");
+    wrefresh(msgs);
+
+    wattron(main_win, COLOR_PAIR(1));
+    mvwaddch(main_win, starty, startx, '@');
+    wrefresh(main_win);
+
+    int ch;
+    while ((ch = getch()) != KEY_F(1)) {
+        switch (ch) {
+        case 'k' :
+            if (starty > 1) {
+                mvwaddch(main_win, starty, startx, ' ');
+                mvwaddch(main_win, --starty, startx, '@');
+            }
+            break;
+        case 'j' :
+            if (starty < MAIN_PANEL_HEIGHT - 2) {
+                mvwaddch(main_win, starty, startx, ' ');
+                mvwaddch(main_win, ++starty, startx, '@');
+            }
+            break;
+        case 'h' :
+            if (startx > 1) {
+                mvwaddch(main_win, starty, startx, ' ');
+                mvwaddch(main_win, starty, --startx, '@');
+            }
+            break;
+        case 'l' :
+            if (startx < MAIN_PANEL_WIDTH - 2) {
+                mvwaddch(main_win, starty, startx, ' ');
+                mvwaddch(main_win, starty, ++startx, '@');
+            }
+            break;
+        }
+        wrefresh(main_win);
+    }
+
+    endwin();
+
+    return 0;
+}