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QFormLayout Class Reference

^{[ QtGui module]}

The QFormLayout class manages forms of input widgets and their associated labels. 更多...

继承 QLayout .

类型

• enum FieldGrowthPolicy { FieldsStayAtSizeHint, ExpandingFieldsGrow, AllNonFixedFieldsGrow }
• enum ItemRole { LabelRole, FieldRole, SpanningRole }
• enum RowWrapPolicy { DontWrapRows, WrapLongRows, WrapAllRows }

方法

• __init__ ( self , QWidget  parent  = None)
• addItem ( self , QLayoutItem  item )
• addRow ( self , QWidget  label , QWidget  field )
• addRow ( self , QWidget  label , QLayout  field )
• addRow ( self , QString  labelText , QWidget  field )
• addRow ( self , QString  labelText , QLayout  field )
• addRow ( self , QWidget  widget )
• addRow ( self , QLayout  layout )
• int count ( self )
• Qt.Orientations expandingDirections ( self )
• FieldGrowthPolicy fieldGrowthPolicy ( self )
• Qt.Alignment formAlignment ( self )
• (int  rowPtr , ItemRole  rolePtr ) getItemPosition ( self , int  index )
• (int  rowPtr , ItemRole  rolePtr ) getLayoutPosition ( self , QLayout  layout )
• (int  rowPtr , ItemRole  rolePtr ) getWidgetPosition ( self , QWidget  widget )
• bool hasHeightForWidth ( self )
• int heightForWidth ( self , int  width )
• int horizontalSpacing ( self )
• insertRow ( self , int  row , QWidget  label , QWidget  field )
• insertRow ( self , int  row , QWidget  label , QLayout  field )
• insertRow ( self , int  row , QString  labelText , QWidget  field )
• insertRow ( self , int  row , QString  labelText , QLayout  field )
• insertRow ( self , int  row , QWidget  widget )
• insertRow ( self , int  row , QLayout  layout )
• invalidate ( self )
• QLayoutItem itemAt ( self , int  row , ItemRole  role )
• QLayoutItem itemAt ( self , int  index )
• Qt.Alignment labelAlignment ( self )
• QWidget labelForField ( self , QWidget  field )
• QWidget labelForField ( self , QLayout  field )
• QSize minimumSize ( self )
• int rowCount ( self )
• RowWrapPolicy rowWrapPolicy ( self )
• setFieldGrowthPolicy ( self , FieldGrowthPolicy  policy )
• setFormAlignment ( self , Qt.Alignment  alignment )
• setGeometry ( self , QRect  rect )
• setHorizontalSpacing ( self , int  spacing )
• setItem ( self , int  row , ItemRole  role , QLayoutItem  item )
• setLabelAlignment ( self , Qt.Alignment  alignment )
• setLayout ( self , int  row , ItemRole  role , QLayout  layout )
• setRowWrapPolicy ( self , RowWrapPolicy  policy )
• setSpacing ( self , int)
• setVerticalSpacing ( self , int  spacing )
• setWidget ( self , int  row , ItemRole  role , QWidget  widget )
• QSize sizeHint ( self )
• int spacing ( self )
• QLayoutItem takeAt ( self , int  index )
• int verticalSpacing ( self )

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详细描述

The QFormLayout class manages forms of input widgets and their associated labels.

QFormLayout is a convenience layout class that lays out its children in a two-column form. The left column consists of labels and the right column consists of "field" widgets (line editors, spin boxes, etc.).

Traditionally, such two-column form layouts were achieved using QGridLayout . QFormLayout is a higher-level alternative that provides the following advantages:

• Adherence to the different platform's look and feel guidelines.

  例如， Mac OS X Aqua and KDE guidelines specify that the labels should be right-aligned, whereas Windows and GNOME applications normally use left-alignment.

• Support for wrapping long rows.

  For devices with small displays, QFormLayout can be set to wrap long rows , or even to wrap all rows .

• Convenient API for creating label--field pairs.

  addRow () overload that 接受 QString 和 QWidget * creates a QLabel behind the scenes and automatically set up its buddy. We can then write code like this:

   QFormLayout *formLayout = new QFormLayout;
   formLayout->addRow(tr("&Name:"), nameLineEdit);
   formLayout->addRow(tr("&Email:"), emailLineEdit);
   formLayout->addRow(tr("&Age:"), ageSpinBox);
   setLayout(formLayout);
  					

  Compare this with the following code, written using QGridLayout :

   nameLabel = new QLabel(tr("&Name:"));
   nameLabel->setBuddy(nameLineEdit);
   emailLabel = new QLabel(tr("&Name:"));
   emailLabel->setBuddy(emailLineEdit);
   ageLabel = new QLabel(tr("&Name:"));
   ageLabel->setBuddy(ageSpinBox);
   QGridLayout *gridLayout = new QGridLayout;
   gridLayout->addWidget(nameLabel, 0, 0);
   gridLayout->addWidget(nameLineEdit, 0, 1);
   gridLayout->addWidget(emailLabel, 1, 0);
   gridLayout->addWidget(emailLineEdit, 1, 1);
   gridLayout->addWidget(ageLabel, 2, 0);
   gridLayout->addWidget(ageSpinBox, 2, 1);
   setLayout(gridLayout);
  					

The table below shows the default appearance in different styles.

QCommonStyle derived styles (except QPlastiqueStyle )	QMacStyle	QPlastiqueStyle	Qt Extended styles
Traditional style used for Windows, GNOME, and earlier versions of KDE. Labels are left aligned, and expanding fields grow to fill the available space. (This normally corresponds to what we would get using a two-column QGridLayout .)	Style based on the Mac OS X Aqua guidelines. Labels are right-aligned, the fields don't grow beyond their size hint, and the form is horizontally centered.	Recommended style for KDE applications . Similar to MacStyle, except that the form is left-aligned and all fields grow to fill the available space.	Default style for Qt Extended styles. Labels are right-aligned, expanding fields grow to fill the available space, and row wrapping is enabled for long lines.

The form styles can be also be overridden individually by calling setLabelAlignment (), setFormAlignment (), setFieldGrowthPolicy (), and setRowWrapPolicy (). For example, to simulate the form layout appearance of QMacStyle on all platforms, but with left-aligned labels, you could write:

 formLayout->setRowWrapPolicy(QFormLayout.DontWrapRows);
 formLayout->setFieldGrowthPolicy(QFormLayout.FieldsStayAtSizeHint);
 formLayout->setFormAlignment(Qt.AlignHCenter | Qt.AlignTop);
 formLayout->setLabelAlignment(Qt.AlignLeft);
			

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类型文档编制

QFormLayout.FieldGrowthPolicy

This enum specifies the different policies that can be used to control the way in which the form's fields grow.

常量	值	描述
QFormLayout.FieldsStayAtSizeHint	0	The fields never grow beyond their effective size hint . This is the default for QMacStyle .
QFormLayout.ExpandingFieldsGrow	1	Fields with an horizontal size policy of Expanding or MinimumExpanding will grow to fill the available space. The other fields will not grow beyond their effective size hint. This is the default policy for Plastique.
QFormLayout.AllNonFixedFieldsGrow	2	All fields with a size policy that allows them to grow will grow to fill the available space. This is the default policy for most styles.

另请参阅 fieldGrowthPolicy .

QFormLayout.ItemRole

This enum specifies the types of widgets (or other layout items) that may appear in a row.

常量	值	描述
QFormLayout.LabelRole	0	A label widget.
QFormLayout.FieldRole	1	A field widget.
QFormLayout.SpanningRole	2	A widget that spans label and field columns.

另请参阅 itemAt () and getItemPosition ().

QFormLayout.RowWrapPolicy

This enum specifies the different policies that can be used to control the way in which the form's rows wrap.

常量	值	描述
QFormLayout.DontWrapRows	0	Fields are always laid out next to their label. This is the default policy for all styles except Qt Extended styles and QS60Style .
QFormLayout.WrapLongRows	1	Labels are given enough horizontal space to fit the widest label, and the rest of the space is given to the fields. If the minimum size of a field pair is wider than the available space, the field is wrapped to the next line. This is the default policy for Qt Extended styles and and QS60Style .
QFormLayout.WrapAllRows	2	Fields are always laid out below their label.

另请参阅 rowWrapPolicy .

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方法文档编制

QFormLayout.__init__ ( self , QWidget   parent  = None)

parent argument, if not None, causes self to be owned by Qt instead of PyQt.

Constructs a new form layout with the given parent 小部件。

另请参阅 QWidget.setLayout ().

QFormLayout.addItem ( self , QLayoutItem   item )

item argument has it's ownership transferred to Qt.

重实现自 QLayout.addItem ().

QFormLayout.addRow ( self , QWidget   label , QWidget   field )

label argument has it's ownership transferred to Qt.

field argument has it's ownership transferred to Qt.

Adds a new row to the bottom of this form layout, with the given label and field .

另请参阅 insertRow ().

QFormLayout.addRow ( self , QWidget   label , QLayout   field )

label argument has it's ownership transferred to Qt.

field argument has it's ownership transferred to Qt.

这是重载函数。

QFormLayout.addRow ( self , QString  labelText , QWidget   field )

field argument has it's ownership transferred to Qt.

这是重载函数。

This overload automatically creates a QLabel behind the scenes with labelText as its text. The field is set as the new QLabel 's buddy .

QFormLayout.addRow ( self , QString  labelText , QLayout   field )

field argument has it's ownership transferred to Qt.

这是重载函数。

This overload automatically creates a QLabel behind the scenes with labelText as its text.

QFormLayout.addRow ( self , QWidget   widget )

widget argument has it's ownership transferred to Qt.

这是重载函数。

Adds the specified widget at the end of this form layout. widget spans both columns.

QFormLayout.addRow ( self , QLayout   layout )

layout argument has it's ownership transferred to Qt.

这是重载函数。

Adds the specified layout at the end of this form layout. layout spans both columns.

int QFormLayout.count ( self )

重实现自 QLayout.count ().

Qt.Orientations QFormLayout.expandingDirections ( self )

重实现自 QLayoutItem.expandingDirections ().

FieldGrowthPolicy QFormLayout.fieldGrowthPolicy ( self )

Qt.Alignment QFormLayout.formAlignment ( self )

(int  rowPtr , ItemRole   rolePtr ) QFormLayout.getItemPosition ( self , int  index )

Retrieves the row and role (column) of the item at the specified index 。若 index is out of bounds, * rowPtr is set to -1; otherwise the row is stored in * rowPtr 和 role is stored in * rolePtr .

另请参阅 itemAt (), count (), getLayoutPosition ()，和 getWidgetPosition ().

(int  rowPtr , ItemRole   rolePtr ) QFormLayout.getLayoutPosition ( self , QLayout   layout )

Retrieves the row and role (column) of the specified child layout 。若 layout is not in the form layout, * rowPtr is set to -1; otherwise the row is stored in * rowPtr and the role is stored in * rolePtr .

(int  rowPtr , ItemRole   rolePtr ) QFormLayout.getWidgetPosition ( self , QWidget   widget )

Retrieves the row and role (column) of the specified widget in the layout. If widget is not in the layout, * rowPtr is set to -1; otherwise the row is stored in * rowPtr and the role is stored in * rolePtr .

另请参阅 getItemPosition () 和 itemAt ().

bool QFormLayout.hasHeightForWidth ( self )

重实现自 QLayoutItem.hasHeightForWidth ().

int QFormLayout.heightForWidth ( self , int  width )

重实现自 QLayoutItem.heightForWidth ().

int QFormLayout.horizontalSpacing ( self )

QFormLayout.insertRow ( self , int  row , QWidget   label , QWidget   field )

label argument has it's ownership transferred to Qt.

field argument has it's ownership transferred to Qt.

Inserts a new row at position row in this form layout, with the given label and field 。若 row is out of bounds, the new row is added at the end.

另请参阅 addRow ().

QFormLayout.insertRow ( self , int  row , QWidget   label , QLayout   field )

label argument has it's ownership transferred to Qt.

field argument has it's ownership transferred to Qt.

这是重载函数。

QFormLayout.insertRow ( self , int  row , QString  labelText , QWidget   field )

field argument has it's ownership transferred to Qt.

这是重载函数。

This overload automatically creates a QLabel behind the scenes with labelText as its text. The field is set as the new QLabel 's buddy .

QFormLayout.insertRow ( self , int  row , QString  labelText , QLayout   field )

field argument has it's ownership transferred to Qt.

这是重载函数。

This overload automatically creates a QLabel behind the scenes with labelText as its text.

QFormLayout.insertRow ( self , int  row , QWidget   widget )

widget argument has it's ownership transferred to Qt.

这是重载函数。

Inserts the specified widget 在位置 row in this form layout. The widget spans both columns. If row is out of bounds, the widget is added at the end.

QFormLayout.insertRow ( self , int  row , QLayout   layout )

layout argument has it's ownership transferred to Qt.

这是重载函数。

Inserts the specified layout 在位置 row in this form layout. The layout spans both columns. If row is out of bounds, the widget is added at the end.

QFormLayout.invalidate ( self )

重实现自 QLayoutItem.invalidate ().

QLayoutItem QFormLayout.itemAt ( self , int  row , ItemRole   role )

Returns the layout item in the given row 采用 specified role (column). Returns 0 if there is no such 项。

另请参阅 QLayout.itemAt () 和 setItem ().

QLayoutItem QFormLayout.itemAt ( self , int  index )

重实现自 QLayout.itemAt ().

Qt.Alignment QFormLayout.labelAlignment ( self )

QWidget QFormLayout.labelForField ( self , QWidget   field )

Returns the label associated with the given field .

另请参阅 itemAt ().

QWidget QFormLayout.labelForField ( self , QLayout   field )

这是重载函数。

QSize QFormLayout.minimumSize ( self )

重实现自 QLayoutItem.minimumSize ().

int QFormLayout.rowCount ( self )

Returns the number of rows in the form.

另请参阅 QLayout.count ().

RowWrapPolicy QFormLayout.rowWrapPolicy ( self )

QFormLayout.setFieldGrowthPolicy ( self , FieldGrowthPolicy   policy )

QFormLayout.setFormAlignment ( self , Qt.Alignment   alignment )

QFormLayout.setGeometry ( self , QRect   rect )

重实现自 QLayoutItem.setGeometry ().

QFormLayout.setHorizontalSpacing ( self , int  spacing )

QFormLayout.setItem ( self , int  row , ItemRole   role , QLayoutItem   item )

item argument has it's ownership transferred to Qt.

设置项在给定 row 为给定 role to item , extending the layout with empty rows if necessary.

If the cell is already occupied, the item is not inserted and an error message is sent to the console. The item spans both columns.

警告： Do not use this function to add child layouts or child widget items. Use setLayout () 或 setWidget () 代替。

另请参阅 setLayout ().

QFormLayout.setLabelAlignment ( self , Qt.Alignment   alignment )

QFormLayout.setLayout ( self , int  row , ItemRole   role , QLayout   layout )

layout argument has it's ownership transferred to Qt.

Sets the sub-layout in the given row 为给定 role to layout , extending the form layout with empty rows if necessary.

If the cell is already occupied, the layout 不是 inserted and an error message is sent to the console.

注意： For most applications, addRow () 或 insertRow () should be used instead of setLayout().

另请参阅 setWidget ().

QFormLayout.setRowWrapPolicy ( self , RowWrapPolicy   policy )

QFormLayout.setSpacing ( self , int)

This function sets both the vertical and horizontal spacing to spacing .

另请参阅 spacing (), setVerticalSpacing (), and setHorizontalSpacing ().

QFormLayout.setVerticalSpacing ( self , int  spacing )

QFormLayout.setWidget ( self , int  row , ItemRole   role , QWidget   widget )

widget argument has it's ownership transferred to Qt.

Sets the widget in the given row 为给定 role to widget , extending the layout with empty rows 若有必要。

If the cell is already occupied, the widget 不是 inserted and an error message is sent to the console.

注意： For most applications, addRow () 或 insertRow () should be used instead of setWidget().

另请参阅 setLayout ().

QSize QFormLayout.sizeHint ( self )

重实现自 QLayoutItem.sizeHint ().

int QFormLayout.spacing ( self )

If the vertical spacing is equal to the horizontal spacing, this function returns that value; otherwise it returns -1.

另请参阅 setSpacing (), verticalSpacing ()，和 horizontalSpacing ().

QLayoutItem QFormLayout.takeAt ( self , int  index )

QLayoutItem result

重实现自 QLayout.takeAt ().

int QFormLayout.verticalSpacing ( self )

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