Doc: Make snippets Qt Gui compilable - textdocument-imagedrop

Task-number: QTBUG-81486
Change-Id: I80b66fce31ba5ee511690283cf56ce4306702b14
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

src/gui/doc/snippets/snippets.pro

@@ -13,5 +13,7 @@ contains(QT_BUILD_PARTS, tests) {
         textdocument-css \
         textdocument-cursors \
         textdocument-end \
-        textdocument-find
+        textdocument-find \
+        textdocument-frames \
+        textdocument-imagedrop
 }

src/gui/doc/snippets/textdocument-imagedrop/main.cpp

@@ -47,16 +47,15 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-
-#include <QtGui>
 #include "textedit.h"
+#include <QApplication>
 
 int main(int argc, char * argv[])
 {
     QApplication app(argc, argv);
 
-    TextEdit *textEdit = new TextEdit;
-    textEdit->show();
+    TextEdit textEdit;
+    textEdit.show();
 
     return app.exec();
-}
+}

src/gui/doc/snippets/textdocument-imagedrop/textdocument-imagedrop.pro

@@ -1,2 +1,8 @@
-SOURCES = textedit.cpp main.cpp
-HEADERS = textedit.h
+TEMPLATE = lib
+TARGET = textdocument-imagedrop
+QT += core gui widgets
+
+HEADERS = \
+    textedit.h
+SOURCES = \
+    main.cpp