Implement holding mwheel to drag map around

1 files changed, 27 insertions, 0 deletions

diff --git a/main.c b/main.c
index 95ee0f6..20c3b57 100644
--- a/main.c
+++ b/main.c
@@ -27,6 +27,7 @@
 
 void sigint_handler(int sig) {
     (void)sig; /* We know it's a SIGINT */
+    printf("\033[?1003l\n"); /* Makes the terminal NOT report mouse movements */
     endwin();
     printf("Received SIGINT\n");
     exit(1);
@@ -149,10 +150,36 @@ int main(int argc, char **argv) {
     set_message("PID: %i", getpid());
 #endif
 
+    MEVENT mevent;
+    //char mwheeldown = 0;
+    //mousemask(BUTTON3_PRESSED | BUTTON3_RELEASED | REPORT_MOUSE_POSITION, NULL);
+    mousemask(BUTTON2_PRESSED | BUTTON2_RELEASED, NULL);
+    mouseinterval(0);
+
     while (1) {
         draw_map(map, cell_costs, width, height, start_pos, end_pos, NULL, path, visited, NULL);
         int c = getch();
         switch (c) {
+            case KEY_MOUSE:
+                if (getmouse(&mevent) == OK && (mevent.bstate & BUTTON2_PRESSED)) {
+                    /* FIXME: it's buggy. if we quickly click mwheel, it doesn't let go */
+                    mousemask(BUTTON2_PRESSED | BUTTON2_RELEASED | REPORT_MOUSE_POSITION, NULL);
+                    printf("\033[?1003h"); fflush(stdout); /* Makes the terminal report mouse movements */
+                    int init_x = mevent.x,
+                        init_y = mevent.y,
+                        init_map_offset_x = map_offset_x,
+                        init_map_offset_y = map_offset_y;
+                    while ((c = getch()) == KEY_MOUSE \
+                            && getmouse(&mevent) == OK && !(mevent.bstate & BUTTON2_RELEASED)) {
+                        map_offset_y = init_map_offset_y + (mevent.y - init_y);
+                        map_offset_x = init_map_offset_x + ((mevent.x - init_x) / 2 * 2);
+                        draw_map(map, cell_costs, width, height, start_pos, end_pos, NULL, path, visited, NULL);
+                    }
+                    mousemask(BUTTON2_PRESSED | BUTTON2_RELEASED, NULL);
+                    printf("\033[?1003l"); fflush(stdout); /* Makes the terminal NOT report mouse movements */
+                }
+                break;
+
             case 'h': map_offset_x += 2; break;
             case 'l': map_offset_x -= 2; break;
             case 'j': map_offset_y -= 1; break;