Doc: compile separations snippets

Done-with: Nico Vertriest <nico.vertriest@qt.io>
Task-number: QTBUG-81486
Change-Id: I62294cedd4a0f96ebc2513b5b4179d451bb4b375
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

src/gui/doc/snippets/separations/finalwidget.cpp

@@ -54,9 +54,16 @@ finalwidget.cpp
 A widget to display an image and a label containing a description.
 */
 
-#include <QtGui>
 #include "finalwidget.h"
 
+#include <QApplication>
+#include <QBuffer>
+#include <QDrag>
+#include <QLabel>
+#include <QMimeData>
+#include <QMouseEvent>
+#include <QVBoxLayout>
+
 FinalWidget::FinalWidget(QWidget *parent, const QString &name,
                          const QSize &labelSize)
     : QFrame(parent)
@@ -96,7 +103,7 @@ void FinalWidget::mouseMoveEvent(QMouseEvent *event)
     QByteArray output;
     QBuffer outputBuffer(&output);
     outputBuffer.open(QIODevice::WriteOnly);
-    imageLabel->pixmap()->toImage().save(&outputBuffer, "PNG");
+    imageLabel->pixmap().toImage().save(&outputBuffer, "PNG");
     mimeData->setData("image/png", output);
 //! [0]
 /*
@@ -105,13 +112,11 @@ void FinalWidget::mouseMoveEvent(QMouseEvent *event)
 //! [1]
 */
     drag->setMimeData(mimeData);
-    drag->setPixmap(imageLabel->pixmap()->scaled(64, 64, Qt::KeepAspectRatio));
+    drag->setPixmap(imageLabel->pixmap().scaled(64, 64, Qt::KeepAspectRatio));
 //! [2]
     drag->setHotSpot(QPoint(drag->pixmap().width()/2,
                             drag->pixmap().height()));
 //! [2]
-
-    drag->start();
 }
 
 /*!
@@ -124,7 +129,7 @@ void FinalWidget::mousePressEvent(QMouseEvent *event)
         dragStartPosition = event->pos();
 }
 
-const QPixmap* FinalWidget::pixmap() const
+QPixmap FinalWidget::pixmap() const
 {
     return imageLabel->pixmap();
 }

src/gui/doc/snippets/separations/finalwidget.h

@@ -68,7 +68,7 @@ class FinalWidget : public QFrame
 public:
     FinalWidget(QWidget *parent, const QString &name, const QSize &labelSize);
     void setPixmap(const QPixmap &pixmap);
-    const QPixmap *pixmap() const;
+    QPixmap pixmap() const;
 
 protected:
     void mouseMoveEvent(QMouseEvent *event) override;

src/gui/doc/snippets/separations/separations.pro

@@ -1,7 +1,13 @@
-HEADERS     = finalwidget.h \
-              screenwidget.h \
-              viewer.h
-SOURCES     = finalwidget.cpp \
-              main.cpp \
-              screenwidget.cpp \
-              viewer.cpp
+TEMPLATE = lib
+TARGET = separations_snippets
+QT += core gui widgets
+
+HEADERS = \
+    finalwidget.h \
+    screenwidget.h \
+    viewer.h
+SOURCES = \
+    finalwidget.cpp \
+    main.cpp \
+    screenwidget.cpp \
+    viewer.cpp

src/gui/doc/snippets/separations/viewer.cpp

@@ -145,7 +145,6 @@ QFrame* Viewer::createCentralWidget()
     QFrame* frame = new QFrame(this);
     grid = new QGridLayout(frame);
     grid->setSpacing(8);
-    grid->setMargin(4);
 
     layout()->setSizeConstraint(QLayout::SetFixedSize);
 
@@ -324,7 +323,7 @@ void Viewer::saveImage()
         QString newImageFile = QFileInfo(info.absoluteDir(),
             info.baseName() + ".png").absoluteFilePath();
 
-        if (!finalWidget->pixmap()->save(newImageFile, "PNG"))
+        if (!finalWidget->pixmap().save(newImageFile, "PNG"))
             (void) QMessageBox::warning(this, tr("Cannot save file"),
                 tr("The file could not be saved."),
                 QMessageBox::Cancel, QMessageBox::NoButton,

src/gui/doc/snippets/snippets.pro

@@ -20,6 +20,7 @@ contains(QT_BUILD_PARTS, tests) {
         qstatustipevent \
         qtextobject \
         scribe-overview \
+        separations \
         textblock-formats \
         textblock-fragments \
         textdocument-blocks \