Don't rely on QPrinter in widgets

Use the QPagedPaintDevice instead for the current
print() methods. Like this we can move the whole
printing system into it's own library.

Change-Id: I5e23fb3a9304eb3d12aa54959893601566249e23
Reviewed-on: http://codereview.qt.nokia.com/3208
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>

src/widgets/dialogs/qprintpreviewdialog.h

@@ -54,6 +54,7 @@ QT_MODULE(Gui)
 
 class QGraphicsView;
 class QPrintPreviewDialogPrivate;
+class QPrinter;
 
 class Q_WIDGETS_EXPORT QPrintPreviewDialog : public QDialog
 {

src/widgets/widgets/qplaintextedit.cpp

@@ -2512,7 +2512,6 @@ bool QPlainTextEdit::canPaste() const
     return d->control->canPaste();
 }
 
-#ifndef QT_NO_PRINTER
 /*!
     Convenience function to print the text edit's document to the given \a printer. This
     is equivalent to calling the print method on the document directly except that this
@@ -2520,12 +2519,11 @@ bool QPlainTextEdit::canPaste() const
 
     \sa QTextDocument::print()
 */
-void QPlainTextEdit::print(QPrinter *printer) const
+void QPlainTextEdit::print(QPagedPaintDevice *printer) const
 {
     Q_D(const QPlainTextEdit);
     d->control->print(printer);
 }
-#endif // QT _NO_PRINTER
 
 /*! \property QPlainTextEdit::tabChangesFocus
   \brief whether \gui Tab changes focus or is accepted as input

src/widgets/widgets/qplaintextedit.h

@@ -64,7 +64,7 @@ class QTextDocument;
 class QMenu;
 class QPlainTextEditPrivate;
 class QMimeData;
-
+class QPagedPaintDevice;
 
 class Q_WIDGETS_EXPORT QPlainTextEdit : public QAbstractScrollArea
 {
@@ -177,9 +177,7 @@ public:
 
     bool canPaste() const;
 
-#ifndef QT_NO_PRINTER
+    void print(QPagedPaintDevice *printer) const;
-    void print(QPrinter *printer) const;
-#endif
 
     int blockCount() const;
 

src/widgets/widgets/qtextedit.cpp

@@ -2285,7 +2285,6 @@ bool QTextEdit::canPaste() const
     return d->control->canPaste();
 }
 
-#ifndef QT_NO_PRINTER
 /*!
     \since 4.3
     Convenience function to print the text edit's document to the given \a printer. This
@@ -2294,12 +2293,11 @@ bool QTextEdit::canPaste() const
 
     \sa QTextDocument::print()
 */
-void QTextEdit::print(QPrinter *printer) const
+void QTextEdit::print(QPagedPaintDevice *printer) const
 {
     Q_D(const QTextEdit);
     d->control->print(printer);
 }
-#endif // QT _NO_PRINTER
 
 /*! \property QTextEdit::tabChangesFocus
   \brief whether \gui Tab changes focus or is accepted as input

src/widgets/widgets/qtextedit.h

@@ -66,6 +66,7 @@ class QTextDocument;
 class QMenu;
 class QTextEditPrivate;
 class QMimeData;
+class QPagedPaintDevice;
 
 class Q_WIDGETS_EXPORT QTextEdit : public QAbstractScrollArea
 {
@@ -232,9 +233,7 @@ public:
 
     bool canPaste() const;
 
-#ifndef QT_NO_PRINTER
+    void print(QPagedPaintDevice *printer) const;
-    void print(QPrinter *printer) const;
-#endif
 
 public Q_SLOTS:
     void setFontPointSize(qreal s);

src/widgets/widgets/qwidgettextcontrol.cpp

@@ -62,7 +62,7 @@
 #include "qtextlist.h"
 #include "private/qwidgettextcontrol_p.h"
 #include "qgraphicssceneevent.h"
-#include "qprinter.h"
+#include "qpagedpaintdevice.h"
 #include "qtextdocumentwriter.h"
 #include "private/qtextcursor_p.h"
 
@@ -2423,14 +2423,15 @@ bool QWidgetTextControl::isWordSelectionEnabled() const
     return d->wordSelectionEnabled;
 }
 
-#ifndef QT_NO_PRINTER
+void QWidgetTextControl::print(QPagedPaintDevice *printer) const
-void QWidgetTextControl::print(QPrinter *printer) const
 {
     Q_D(const QWidgetTextControl);
-    if (!printer || !printer->isValid())
+    if (!printer)
         return;
     QTextDocument *tempDoc = 0;
     const QTextDocument *doc = d->doc;
+#if 0
+    // ####
     if (printer->printRange() == QPrinter::Selection) {
         if (!d->cursor.hasSelection())
             return;
@@ -2445,10 +2446,10 @@ void QWidgetTextControl::print(QPrinter *printer) const
         // copy the custom object handlers
         doc->documentLayout()->d_func()->handlers = d->doc->documentLayout()->d_func()->handlers;
     }
+#endif
     doc->print(printer);
     delete tempDoc;
 }
-#endif // QT_NO_PRINTER
 
 QMimeData *QWidgetTextControl::createMimeDataFromSelection() const
 {

src/widgets/widgets/qwidgettextcontrol_p.h

@@ -176,9 +176,7 @@ public:
     bool isWordSelectionEnabled() const;
     void setWordSelectionEnabled(bool enabled);
 
-#ifndef QT_NO_PRINTER
+    void print(QPagedPaintDevice *printer) const;
-    void print(QPrinter *printer) const;
-#endif
 
     virtual int hitTest(const QPointF &point, Qt::HitTestAccuracy accuracy) const;
     virtual QRectF blockBoundingRect(const QTextBlock &block) const;