Qt Designer: Add a setting for calling connectSlotsByName()

Add a boolean attribute to DomUI and a form setting, allowing for
per-form migration to the Qt 5 connection syntax.

[ChangeLog][Designer] A per-form setting for disabling generating
calls to QObject::connectSlotsByName() has been added to support
migrating forms to Qt 5 connection syntax.

Task-number: QTBUG-76375
Change-Id: Id59d4689287fdec025c199e4efc87a919e37ae9e
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/designer/src/components/formeditor/qdesigner_resource.cpp b/src/designer/src/components/formeditor/qdesigner_resource.cpp
index 4b747d04c..dd1144d7c 100644
--- a/src/designer/src/components/formeditor/qdesigner_resource.cpp
+++ b/src/designer/src/components/formeditor/qdesigner_resource.cpp
@@ -512,6 +512,8 @@ void QDesignerResource::saveDom(DomUI *ui, QWidget *widget)
 
     if (m_formWindow->useIdBasedTranslations())
         ui->setAttributeIdbasedtr(true);
+    if (!m_formWindow->connectSlotsByName()) // Don't write out if true (default)
+        ui->setAttributeConnectslotsbyname(false);
 
     const QVariantMap designerFormData = m_formWindow->formData();
     if (!designerFormData.empty()) {
@@ -646,8 +648,12 @@ QWidget *QDesignerResource::create(DomUI *ui, QWidget *parentWidget)
     QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem.
     QWidget *mainWidget = QAbstractFormBuilder::create(ui, parentWidget);
 
-    if (m_formWindow)
+    if (m_formWindow) {
         m_formWindow->setUseIdBasedTranslations(ui->attributeIdbasedtr());
+        // Default to true unless set.
+        const bool connectSlotsByName = !ui->hasAttributeConnectslotsbyname() || ui->attributeConnectslotsbyname();
+        m_formWindow->setConnectSlotsByName(connectSlotsByName);
+    }
 
     if (mainWidget && m_formWindow) {
         m_formWindow->setAuthor(ui->elementAuthor());