内容

• 公共函数
• 重实现公共函数
• 信号
• 详细描述

QPrintPreviewDialog 类

QPrintPreviewDialog 类提供用于打印机输出而预览和配置页面布局的 Widget。 更多...

头：	#include <QPrintPreviewDialog>
qmake:	QT += printsupport
Since:	Qt 4.4
继承：	QDialog

该类在 Qt 4.4 引入。

• 所有成员列表，包括继承成员

公共函数

	QPrintPreviewDialog (QPrinter * printer , QWidget * parent = nullptr, Qt::WindowFlags flags = Qt::WindowFlags())
	QPrintPreviewDialog (QWidget * parent = nullptr, Qt::WindowFlags flags = Qt::WindowFlags())
virtual	~QPrintPreviewDialog ()
void	open (QObject * receiver , const char * member )
QPrinter *	printer ()

重实现公共函数

virtual void	done (int result ) override
virtual void	setVisible (bool visible ) override

信号

void	paintRequested (QPrinter * printer )

详细描述

Using QPrintPreviewDialog in your existing application is straightforward:

1. Create the QPrintPreviewDialog.

   You can construct a QPrintPreviewDialog with an existing QPrinter object, or you can have QPrintPreviewDialog create one for you, which will be the system default printer.

2. Connect the paintRequested () signal to a slot.

   When the dialog needs to generate a set of preview pages, the paintRequested () signal will be emitted. You can use the exact same code for the actual printing as for having the preview generated, including calling QPrinter::newPage () to start a new page in the preview. Connect a slot to the paintRequested () signal, where you draw onto the QPrinter object that is passed into the slot.

3. 调用 exec ().

   调用 QPrintPreviewDialog::exec () to show the preview dialog.

另请参阅 QPrinter , QPrintDialog , QPageSetupDialog ，和 QPrintPreviewWidget .

成员函数文档编制

QPrintPreviewDialog:: QPrintPreviewDialog ( QPrinter * printer , QWidget * parent = nullptr, Qt::WindowFlags flags = Qt::WindowFlags())

Constructs a QPrintPreviewDialog based on printer 和采用 parent as the parent widget. The widget flags flags are passed on to the QWidget 构造函数。

另请参阅 QWidget::setWindowFlags ().

QPrintPreviewDialog:: QPrintPreviewDialog ( QWidget * parent = nullptr, Qt::WindowFlags flags = Qt::WindowFlags())

这是重载函数。

This will create an internal QPrinter object, which will use the system default printer.

[signal] void QPrintPreviewDialog:: paintRequested ( QPrinter * printer )

此信号被发射当 QPrintPreviewDialog needs to generate a set of preview pages.

printer instance supplied is the paint device onto which you should paint the contents of each page, using the QPrinter instance in the same way as you would when printing directly.

[virtual] QPrintPreviewDialog:: ~QPrintPreviewDialog ()

销毁 QPrintPreviewDialog .

[override virtual] void QPrintPreviewDialog:: done ( int result )

重实现： QDialog::done (int r).

void QPrintPreviewDialog:: open ( QObject * receiver , const char * member )

这是重载函数。

Opens the dialog and connects its finished(int) signal to the slot specified by receiver and member .

信号将断开槽连接，当对话框被关闭时。

该函数在 Qt 4.5 引入。

QPrinter *QPrintPreviewDialog:: printer ()

返回指针指向 QPrinter object this dialog is currently operating on.

[override virtual] void QPrintPreviewDialog:: setVisible ( bool visible )

重实现： QDialog::setVisible (bool visible).