Changeset e3e64f6 in mainline

Timestamp:

2021-11-04T16:36:15Z (3 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f0155e4

Parents:

bad765a

Message:

Pause before resuming UI, if needed

To be able to see output of commands executed from Navigator, we need
to pause before repainting the UI. This should not be needed, however,
for binaries that do not leave anything on the screen (e.g. (G)UI
applications). We use a simple heuristic - if the cursor is in the top
left corner of the screen, we don't pause.

File:

• uspace/lib/ui/src/ui.c (modified) (1 diff)

uspace/lib/ui/src/ui.c

@@ -399 +399 @@
         errno_t rc;
         ui_window_t *awnd;
+        sysarg_t col;
+        sysarg_t row;
+        cons_event_t ev;
 
         if (ui->cgc == NULL)
                 return EOK;
+
+        rc = console_get_pos(ui->console, &col, &row);
+        if (rc != EOK)
+                return rc;
+
+        /*
+         * Here's a little heuristic to help determine if we need
+         * to pause before returning to the UI. If we are in the
+         * top-left corner, chances are the screen is empty and
+         * there is no need to pause.
+         */
+        if (col != 0 || row != 0) {
+                printf("Press any key or button to continue...\n");
+
+                while (true) {
+                        rc = console_get_event(ui->console, &ev);
+                        if (rc != EOK)
+                                return EIO;
+
+                        if (ev.type == CEV_KEY && ev.ev.key.type == KEY_PRESS)
+                                break;
+
+                        if (ev.type == CEV_POS && ev.ev.pos.type == POS_PRESS)
+                                break;
+                }
+        }
 
         rc = console_gc_resume(ui->cgc);