msbuild: use the moc dispatcher from Qt's vstools

The new method supports build parallelism and cleaner
integration into msbuild dependency flows.

Source/VSProps/qtmoc.props

@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/****************************************************************************
+**
+** Copyright (C) 2019 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+-->
+<!--
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Qt/MSBuild moc property definitions
+// -->
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <!--
+  /////////////////////////////////////////////////////////////////////////////////////////////////
+  // Import pre-requisites
+  // -->
+  <Import
+    Condition="'$(QtMsBuildProps_BeforeMoc)' != ''"
+    Project="$(QtMsBuildProps_BeforeMoc)"/>
+
+  <!--
+  /////////////////////////////////////////////////////////////////////////////////////////////////
+  // QtMoc item template
+  // -->
+  <ItemDefinitionGroup>
+    <QtMoc>
+      <ExecutionDescription>moc %(Identity)</ExecutionDescription>
+
+      <QTDIR Condition="'$(QtVsProjectSettings)' != 'true'"
+        >$(QTDIR)</QTDIR>
+      <QTDIR Condition="'$(QtVsProjectSettings)' == 'true'"
+        >$(QtInstallDir)</QTDIR>
+
+      <InputFile>%(FullPath)</InputFile>
+
+      <OutputFile Condition="'$(QtVsProjectSettings)' != 'true'"
+        >$(ProjectDir)GeneratedFiles\$(Configuration)\moc_%(Filename).cpp</OutputFile>
+
+      <QtMocDir Condition="'$(QtVsProjectSettings)' == 'true'"
+        >$(IntDir)moc\</QtMocDir>
+      <QtMocFileName Condition="'$(QtVsProjectSettings)' == 'true'"
+        >moc_%(Filename).cpp</QtMocFileName>
+
+      <DynamicSource>output</DynamicSource>
+      <ParallelProcess>true</ParallelProcess>
+      <CommandLineTemplate>[AllOptions] [AdditionalOptions]</CommandLineTemplate>
+      <Outputs>%(OutputFile)</Outputs>
+      <OverrideClCompile>false</OverrideClCompile>
+    </QtMoc>
+  </ItemDefinitionGroup>
+
+  <!--
+  /////////////////////////////////////////////////////////////////////////////////////////////////
+  // Import dependants
+  // -->
+  <Import
+    Condition="'$(QtMsBuildProps_AfterMoc)' != ''"
+    Project="$(QtMsBuildProps_AfterMoc)"/>
+
+</Project>