QmlDesigner: Forward QT_IM_MODULE=qtvirtualkeyboard to puppet

If QT_IM_MODULE=qtvirtualkeyboard is used for the application,
when we should also set it for the puppet.

Task-number: QDS-3859
Change-Id: Id88132cebbb7aeddb3fbb8ff1e8aa5191cc89d15
Reviewed-by: Tuomo Pelkonen <tuomo.pelkonen@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/designercore/instances/puppetcreator.cpp

@@ -47,6 +47,7 @@
 
 #include <qmlprojectmanager/qmlmultilanguageaspect.h>
 
+#include <qmlprojectmanager/qmlproject.h>
 #include <qtsupport/baseqtversion.h>
 #include <qtsupport/qtkitinformation.h>
 #include <qtsupport/qtsupportconstants.h>
@@ -167,6 +168,20 @@ QString PuppetCreator::getStyleConfigFileName() const
     return QString();
 }
 
+bool PuppetCreator::usesVirtualKeyboard() const
+{
+#ifndef QMLDESIGNER_TEST
+    if (m_target) {
+        auto *qmlbuild = qobject_cast<QmlProjectManager::QmlBuildSystem *>(m_target->buildSystem());
+
+        const Utils::EnvironmentItem virtualKeyboard("QT_IM_MODULE", "qtvirtualkeyboard");
+        return qmlbuild && qmlbuild->environment().indexOf(virtualKeyboard);
+    }
+
+#endif
+    return false;
+}
+
 PuppetCreator::PuppetCreator(ProjectExplorer::Target *target, const Model *model)
 
     : m_target(target)
@@ -494,6 +509,11 @@ QProcessEnvironment PuppetCreator::processEnvironment() const
         environment.set("QMLDESIGNER_RC_PATHS", m_qrcMapping);
     }
 
+    if (usesVirtualKeyboard()) {
+        environment.set("QT_IM_MODULE", "qtvirtualkeyboard");
+        environment.set("QT_VIRTUALKEYBOARD_DESKTOP_DISABLE", "1");
+    }
+
 #ifndef QMLDESIGNER_TEST
     // set env var if QtQuick3D import exists
     QmlDesigner::Import import = QmlDesigner::Import::createLibraryImport("QtQuick3D", "1.0");

src/plugins/qmldesigner/designercore/instances/puppetcreator.h

@@ -103,6 +103,7 @@ protected:
 
     bool useOnlyFallbackPuppet() const;
     QString getStyleConfigFileName() const;
+    bool usesVirtualKeyboard() const;
 
 private:
     mutable QString m_compileLog;