Replace qdebug.h includes in public headers with forward-declarations

qdebug.h includes many Qt and STL headers, so if you include a Qt header
you get all those transitive includes, which may affect build time.

- Where appropriate use the printf-like syntax of qDebug() and co.,
  these don't need the QDebug streaming operators
- qfloat16 is used in an inline member function, so include it
  explicitly

[ChangeLog][Potentially Source Incompatible Changes] Various Qt public
headers don't include QDebug any more; if you need QDebug's streaming
you'll have to include it in your code.

Task-number: QTBUG-132439
Pick-to: 6.9
Change-Id: I750587e17a3b38fa226cd3af8eaccc8da580f436
Reviewed-by: Thiago Macieira <[email protected]>

2 files changed, 2 insertions, 0 deletions

diff --git a/examples/widgets/graphicsview/chip/chip.cpp b/examples/widgets/graphicsview/chip/chip.cpp
index c1a539eddba..c67c5beb2e4 100644
--- a/examples/widgets/graphicsview/chip/chip.cpp
+++ b/examples/widgets/graphicsview/chip/chip.cpp
@@ -6,6 +6,7 @@
 #include <QGraphicsSceneMouseEvent>
 #include <QPainter>
 #include <QStyleOptionGraphicsItem>
+#include <QVarLengthArray>
 
 Chip::Chip(const QColor &color, int x, int y)
 {
diff --git a/examples/widgets/itemviews/editabletreemodel/mainwindow.cpp b/examples/widgets/itemviews/editabletreemodel/mainwindow.cpp
index cf88932cdb0..75d7eb7e73c 100644
--- a/examples/widgets/itemviews/editabletreemodel/mainwindow.cpp
+++ b/examples/widgets/itemviews/editabletreemodel/mainwindow.cpp
@@ -4,6 +4,7 @@
 #include "mainwindow.h"
 #include "treemodel.h"
 
+#include <QDebug>
 #include <QFile>
 
 using namespace Qt::StringLiterals;