Layouts docs: pass parent widget in the ctor

This is a follow up from commit 1e904ab342c1aaa; changing more
documentation to pass a widget * in the ctor of a layout, rather
than creating a parent-less layout then calling setLayout().

Change-Id: I4fc59c6cfa46ccd279a153acd67335a6daf22ff9
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

3 files changed, 3 insertions, 6 deletions

diff --git a/src/gui/doc/snippets/separations/finalwidget.cpp b/src/gui/doc/snippets/separations/finalwidget.cpp
index a3d60cfc83..3c308d9df8 100644
--- a/src/gui/doc/snippets/separations/finalwidget.cpp
+++ b/src/gui/doc/snippets/separations/finalwidget.cpp
@@ -28,10 +28,9 @@ FinalWidget::FinalWidget(QWidget *parent, const QString &name,
     imageLabel->setMinimumSize(labelSize);
     nameLabel = new QLabel(name);
 
-    QVBoxLayout *layout = new QVBoxLayout;
+    QVBoxLayout *layout = new QVBoxLayout(this);
     layout->addWidget(imageLabel, 1);
     layout->addWidget(nameLabel, 0);
-    setLayout(layout);
 }
 
 /*!
diff --git a/src/gui/doc/snippets/separations/screenwidget.cpp b/src/gui/doc/snippets/separations/screenwidget.cpp
index 87a6c9e605..223de95962 100644
--- a/src/gui/doc/snippets/separations/screenwidget.cpp
+++ b/src/gui/doc/snippets/separations/screenwidget.cpp
@@ -61,12 +61,11 @@ ScreenWidget::ScreenWidget(QWidget *parent, QColor initialColor,
     connect(colorButton, &QPushButton::clicked, this, &ScreenWidget::setColor);
     connect(invertButton, &QPushButton::clicked, this, &ScreenWidget::invertImage);
 
-    QGridLayout *gridLayout = new QGridLayout;
+    QGridLayout *gridLayout = new QGridLayout(this);
     gridLayout->addWidget(imageLabel, 0, 0, 1, 2);
     gridLayout->addWidget(nameLabel, 1, 0);
     gridLayout->addWidget(colorButton, 1, 1);
     gridLayout->addWidget(invertButton, 2, 1, 1, 1);
-    setLayout(gridLayout);
 }
 
 /*!
diff --git a/src/gui/doc/snippets/transform/main.cpp b/src/gui/doc/snippets/transform/main.cpp
index 56d6780269..cedffe218c 100644
--- a/src/gui/doc/snippets/transform/main.cpp
+++ b/src/gui/doc/snippets/transform/main.cpp
@@ -91,11 +91,10 @@ int main(int argc, char **argv)
     CombinedTransformation *combinedWidget = new CombinedTransformation;
     BasicOperations *basicWidget = new BasicOperations;
 
-    QVBoxLayout *layout = new QVBoxLayout;
+    QVBoxLayout *layout = new QVBoxLayout(&widget);
     layout->addWidget(simpleWidget);
     layout->addWidget(combinedWidget);
     layout->addWidget(basicWidget);
-    widget.setLayout(layout);
 
     widget.show();
     widget.resize(130, 350);