DolphinView: set the parent of layout in the ctor

This silences a runtime warning:
QLayout: Attempting to add QLayout "" to DolphinView "", which already
has a layout

Remove redudant setLayout() calls, passing a parent widget to the
Q*BoxLayout ctor sets that layout as the top-level layout for that widget.

5 files changed, 8 insertions, 15 deletions

diff --git a/src/search/dolphinsearchbox.cpp b/src/search/dolphinsearchbox.cpp
index 16f12b989..9143ddcb7 100644
--- a/src/search/dolphinsearchbox.cpp
+++ b/src/search/dolphinsearchbox.cpp
@@ -416,8 +416,12 @@ void DolphinSearchBox::init()
     m_facetsWidget->layout()->setSpacing(Dolphin::LAYOUT_SPACING_SMALL);
     connect(m_facetsWidget, &DolphinFacetsWidget::facetChanged, this, &DolphinSearchBox::slotFacetChanged);
 
+    // Put the options into a QScrollArea. This prevents increasing the view width
+    // in case that not enough width for the options is available.
+    QWidget* optionsContainer = new QWidget(this);
+
     // Apply layout for the options
-    QHBoxLayout* optionsLayout = new QHBoxLayout();
+    QHBoxLayout* optionsLayout = new QHBoxLayout(optionsContainer);
     optionsLayout->setContentsMargins(0, 0, 0, 0);
     optionsLayout->setSpacing(Dolphin::LAYOUT_SPACING_SMALL);
     optionsLayout->addWidget(m_fileNameButton);
@@ -429,11 +433,6 @@ void DolphinSearchBox::init()
     optionsLayout->addWidget(moreSearchToolsButton);
     optionsLayout->addStretch(1);
 
-    // Put the options into a QScrollArea. This prevents increasing the view width
-    // in case that not enough width for the options is available.
-    QWidget* optionsContainer = new QWidget(this);
-    optionsContainer->setLayout(optionsLayout);
-
     m_optionsScrollArea = new QScrollArea(this);
     m_optionsScrollArea->setFrameShape(QFrame::NoFrame);
     m_optionsScrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
diff --git a/src/settings/general/configurepreviewplugindialog.cpp b/src/settings/general/configurepreviewplugindialog.cpp
index d29b63b7d..4d7ee589a 100644
--- a/src/settings/general/configurepreviewplugindialog.cpp
+++ b/src/settings/general/configurepreviewplugindialog.cpp
@@ -38,7 +38,6 @@ ConfigurePreviewPluginDialog::ConfigurePreviewPluginDialog(const QString& plugin
     setMinimumWidth(400);
 
     auto layout = new QVBoxLayout(this);
-    setLayout(layout);
 
     if (previewPlugin) {
         auto configurationWidget = previewPlugin->createConfigurationWidget();
diff --git a/src/settings/viewpropertiesdialog.cpp b/src/settings/viewpropertiesdialog.cpp
index c6dbc82b4..2bf317440 100644
--- a/src/settings/viewpropertiesdialog.cpp
+++ b/src/settings/viewpropertiesdialog.cpp
@@ -64,7 +64,6 @@ ViewPropertiesDialog::ViewPropertiesDialog(DolphinView* dolphinView) :
     auto layout = new QFormLayout(this);
     // Otherwise the dialog won't resize when we collapse the KCollapsibleGroupBox.
     layout->setSizeConstraint(QLayout::SetFixedSize);
-    setLayout(layout);
 
     // create 'Properties' group containing view mode, sorting, sort order and show hidden files
     m_viewMode = new QComboBox();
@@ -89,7 +88,7 @@ ViewPropertiesDialog::ViewPropertiesDialog(DolphinView* dolphinView) :
 
     auto additionalInfoBox = new KCollapsibleGroupBox();
     additionalInfoBox->setTitle(i18nc("@title:group", "Additional Information"));
-    auto innerLayout = new QVBoxLayout();
+    auto innerLayout = new QVBoxLayout(additionalInfoBox);
 
     {
         QList<QByteArray> visibleRoles = m_viewProps->visibleRoles();
@@ -133,8 +132,6 @@ ViewPropertiesDialog::ViewPropertiesDialog(DolphinView* dolphinView) :
         innerLayout->addWidget(m_listWidget);
     }
 
-    additionalInfoBox->setLayout(innerLayout);
-
     QHBoxLayout* sortingLayout = new QHBoxLayout();
     sortingLayout->setContentsMargins(0, 0, 0, 0);
     sortingLayout->addWidget(m_sortOrder);
diff --git a/src/settings/viewpropsprogressinfo.cpp b/src/settings/viewpropsprogressinfo.cpp
index 57a00c2b1..cd4ff379c 100644
--- a/src/settings/viewpropsprogressinfo.cpp
+++ b/src/settings/viewpropsprogressinfo.cpp
@@ -44,7 +44,6 @@ ViewPropsProgressInfo::ViewPropsProgressInfo(QWidget* parent,
     m_viewProps->setAutoSaveEnabled(false);
 
     auto layout = new QVBoxLayout(this);
-    setLayout(layout);
 
     m_label = new QLabel(i18nc("@info:progress", "Counting folders: %1", 0), this);
     layout->addWidget(m_label);
diff --git a/src/views/dolphinview.cpp b/src/views/dolphinview.cpp
index ef346b3e4..71c16bf46 100644
--- a/src/views/dolphinview.cpp
+++ b/src/views/dolphinview.cpp
@@ -140,9 +140,8 @@ DolphinView::DolphinView(const QUrl& url, QWidget* parent) :
     m_placeholderLabel->setGraphicsEffect(effect);
     // Set initial text and visibility
     updatePlaceholderLabel();
-    // Add a new layout to hold it and put it in the layout
-    auto *centeringLayout = new QVBoxLayout(this);
-    m_container->setLayout(centeringLayout);
+
+    auto *centeringLayout = new QVBoxLayout(m_container);
     centeringLayout->addWidget(m_placeholderLabel);
     centeringLayout->setAlignment(m_placeholderLabel, Qt::AlignCenter);