Show no-Qt-version message on the VS info bar

When starting VS, the extension will check if there are Qt versions
registered. If not, a notification is displayed on the VS info bar,
with a link to the Qt Versions options page.

Fixes: QTVSADDINBUG-953
Change-Id: I92e275e4b8fe7d7443af64a7d733e8020782daab
Reviewed-by: Karsten Heimrich <karsten.heimrich@qt.io>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

5 files changed, 91 insertions, 0 deletions

diff --git a/QtVsTools.Package/Options/QtVersionsPage.cs b/QtVsTools.Package/Options/QtVersionsPage.cs
index db3d1d6f..e282369d 100644
--- a/QtVsTools.Package/Options/QtVersionsPage.cs
+++ b/QtVsTools.Package/Options/QtVersionsPage.cs
@@ -122,6 +122,9 @@ namespace QtVsTools.Options
                 Messages.Print(
                     exception.Message + "\r\n\r\nStacktrace:\r\n" + exception.StackTrace);
             }
+
+            if (InfoBarMessages.NoQtVersion.IsOpen && VersionManager.GetVersions()?.Any() == true)
+                InfoBarMessages.NoQtVersion.Close();
         }
 
         protected override void OnApply(PageApplyEventArgs e)
diff --git a/QtVsTools.Package/Package/DteEventsHandler.cs b/QtVsTools.Package/Package/DteEventsHandler.cs
index 9bbc49ae..b8b833d6 100644
--- a/QtVsTools.Package/Package/DteEventsHandler.cs
+++ b/QtVsTools.Package/Package/DteEventsHandler.cs
@@ -56,6 +56,7 @@ namespace QtVsTools
         private CommandEvents debugStartEvents;
         private CommandEvents debugStartWithoutDebuggingEvents;
         private CommandEvents f1HelpEvents;
+        private WindowEvents windowEvents;
         private int dispId_VCFileConfiguration_ExcludedFromBuild;
         private int dispId_VCCLCompilerTool_UsePrecompiledHeader;
         private int dispId_VCCLCompilerTool_PrecompiledHeaderThrough;
@@ -85,6 +86,9 @@ namespace QtVsTools
             solutionEvents.Opened += SolutionEvents_Opened;
             solutionEvents.AfterClosing += SolutionEvents_AfterClosing;
 
+            windowEvents = events.WindowEvents;
+            windowEvents.WindowActivated += WindowEvents_WindowActivated;
+
             var debugCommandsGUID = "{5EFC7975-14BC-11CF-9B2B-00AA00573819}";
             debugStartEvents = events.get_CommandEvents(debugCommandsGUID, 295);
             debugStartEvents.BeforeExecute += debugStartEvents_BeforeExecute;
@@ -105,6 +109,16 @@ namespace QtVsTools
             InitializeVCProjects();
         }
 
+        private void WindowEvents_WindowActivated(Window gotFocus, Window lostFocus)
+        {
+            ThreadHelper.ThrowIfNotOnUIThread();
+            if (dte.MainWindow?.Visible == true) {
+                windowEvents.WindowActivated -= WindowEvents_WindowActivated;
+                windowEvents = null;
+                QtVsToolsPackage.Instance.VsMainWindowActivated();
+            }
+        }
+
         private void F1HelpEvents_BeforeExecute(
             string Guid, int ID, object CustomIn, object CustomOut, ref bool CancelDefault)
         {
@@ -176,6 +190,9 @@ namespace QtVsTools
 
             if (vcProjectEngineEvents != null)
                 vcProjectEngineEvents.ItemPropertyChange -= OnVCProjectEngineItemPropertyChange;
+
+            if (windowEvents != null)
+                windowEvents.WindowActivated -= WindowEvents_WindowActivated;
         }
 
         public void OnBuildProjConfigBegin(string projectName, string projectConfig, string platform, string solutionConfig)
diff --git a/QtVsTools.Package/Package/InfoBarMessages.cs b/QtVsTools.Package/Package/InfoBarMessages.cs
new file mode 100644
index 00000000..b1042200
--- /dev/null
+++ b/QtVsTools.Package/Package/InfoBarMessages.cs
@@ -0,0 +1,64 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt VS Tools.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+using System;
+using Microsoft.VisualStudio.Imaging;
+
+namespace QtVsTools
+{
+    using static VisualStudio.InfoBar;
+
+    internal static class InfoBarMessages
+    {
+        static IMessage _NoQtVersion = null;
+        public static IMessage NoQtVersion => _NoQtVersion ?? (
+            _NoQtVersion = new Message
+            {
+                Icon = KnownMonikers.StatusInformation,
+                Text = new TextSpan[]
+                {
+                    new TextSpan { Bold = true, Text = "Qt Visual Studio Tools" },
+                    new TextSpacer(2),
+                    "\u2014", // Em dash
+                    new TextSpacer(2),
+                    "You must select a Qt version to use for development."
+                },
+                Hyperlinks = new Hyperlink[]
+                {
+                    new Hyperlink
+                    {
+                        Text = "Select Qt version...",
+                        CloseInfoBar = false,
+                        OnClicked = () =>
+                            QtVsToolsPackage.Instance.ShowOptionPage(typeof(Options.QtVersionsPage))
+                    }
+                }
+            }
+        );
+    }
+}
diff --git a/QtVsTools.Package/QtVsTools.Package.csproj b/QtVsTools.Package/QtVsTools.Package.csproj
index 20247c84..c99d4be4 100644
--- a/QtVsTools.Package/QtVsTools.Package.csproj
+++ b/QtVsTools.Package/QtVsTools.Package.csproj
@@ -452,6 +452,7 @@
     <Compile Include="Package\Translation.cs" />
     <Compile Include="Package\TranslationItem.cs" />
     <Compile Include="VisualStudio\InfoBar.cs" />
+    <Compile Include="Package\InfoBarMessages.cs" />
     <Compile Include="VisualStudio\VsShell.cs" />
     <Compile Include="Common\VsToolsDialogWindow.cs" />
     <Content Include="..\Changelog">
diff --git a/QtVsTools.Package/QtVsToolsPackage.cs b/QtVsTools.Package/QtVsToolsPackage.cs
index 2b8d9d06..5fec3978 100644
--- a/QtVsTools.Package/QtVsToolsPackage.cs
+++ b/QtVsTools.Package/QtVsToolsPackage.cs
@@ -326,6 +326,12 @@ namespace QtVsTools
                 eventHandler.SolutionEvents_Opened();
         }
 
+        public void VsMainWindowActivated()
+        {
+            if (QtVersionManager.The().GetVersions()?.Length == 0)
+                InfoBarMessages.NoQtVersion.Show();
+        }
+
         protected override int QueryClose(out bool canClose)
         {
             if (eventHandler != null) {