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。
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 () |
virtual void | done (int result ) override |
virtual void | setVisible (bool visible ) override |
void | paintRequested (QPrinter * printer ) |
Using QPrintPreviewDialog in your existing application is straightforward:
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.
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.
调用 QPrintPreviewDialog::exec () to show the preview dialog.
另请参阅 QPrinter , QPrintDialog , QPageSetupDialog ,和 QPrintPreviewWidget .
Constructs a QPrintPreviewDialog based on printer 和采用 parent as the parent widget. The widget flags flags 被传递给 QWidget 构造函数。
另请参阅 QWidget::setWindowFlags ().
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
)
此信号发射当 QPrintPreviewDialog needs to generate a set of preview pages.
The 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.
[虚拟]
QPrintPreviewDialog::
~QPrintPreviewDialog
()
销毁 QPrintPreviewDialog .
[override virtual]
void
QPrintPreviewDialog::
done
(
int
result
)
重实现: QDialog::done (int r).
这是重载函数。
Opens the dialog and connects its finished(int) signal to the slot specified by receiver and member .
将从槽断开信号连接,当关闭对话框时。
该函数在 Qt 4.5 引入。
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).