From 14d09ea7a352f015b3f91829bd10a7748548895e Mon Sep 17 00:00:00 2001
From: Ville Nummela <ville.nummela@jolla.com>
Date: Tue, 23 Nov 2021 10:00:09 +0200
Subject: [PATCH] ProjectExplorer: Display message while fetching process list

Fetching process list from remote device can take a long time, which
might cause impatient users think that something is wrong and cancel
the listing.

Change-Id: Ideee017340811bc5600dd2a66a0afee6d223844e
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
---
 .../projectexplorer/devicesupport/deviceprocesslist.cpp    | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/plugins/projectexplorer/devicesupport/deviceprocesslist.cpp b/src/plugins/projectexplorer/devicesupport/deviceprocesslist.cpp
index 50ccc5c66b9..b54b0baddb0 100644
--- a/src/plugins/projectexplorer/devicesupport/deviceprocesslist.cpp
+++ b/src/plugins/projectexplorer/devicesupport/deviceprocesslist.cpp
@@ -80,6 +80,10 @@ void DeviceProcessList::update()
     QTC_ASSERT(device(), return);
 
     d->model.clear();
+    d->model.rootItem()->appendChild(
+                new DeviceProcessTreeItem(
+                    {0, tr("Fetching process list. This might take a while."), ""},
+                    Qt::NoItemFlags));
     d->state = Listing;
     doUpdate();
 }
@@ -88,6 +92,7 @@ void DeviceProcessList::reportProcessListUpdated(const QList<DeviceProcessItem>
 {
     QTC_ASSERT(d->state == Listing, return);
     setFinished();
+    d->model.clear();
     for (const DeviceProcessItem &process : processes) {
         Qt::ItemFlags fl;
         if (process.pid != d->ownPid)
@@ -134,7 +139,7 @@ QVariant DeviceProcessTreeItem::data(int column, int role) const
 {
     if (role == Qt::DisplayRole || role == Qt::ToolTipRole) {
         if (column == 0)
-            return process.pid;
+            return process.pid ? process.pid : QVariant();
         else
             return process.cmdLine;
     }