# QComboBox Class Reference
## [[QtGui](index.htm) module]
該QComboBox表示widget是一個組合鍵,彈出的列表中。[More...](#details)
繼承[QWidget](qwidget.html)。
通過繼承[QFontComboBox](qfontcombobox.html)。
### Types
* `enum InsertPolicy { NoInsert, InsertAtTop, InsertAtCurrent, InsertAtBottom, ..., InsertAlphabetically }`
* `enum SizeAdjustPolicy { AdjustToContents, AdjustToContentsOnFirstShow, AdjustToMinimumContentsLength, AdjustToMinimumContentsLengthWithIcon }`
### Methods
* `__init__ (self, QWidget?parent?=?None)`
* `addItem (self, QString?text, QVariant?userData?=?QVariant())`
* `addItem (self, QIcon?icon, QString?text, QVariant?userData?=?QVariant())`
* `addItems (self, QStringList?texts)`
* `bool autoCompletion (self)`
* `Qt.CaseSensitivity autoCompletionCaseSensitivity (self)`
* `changeEvent (self, QEvent?e)`
* `clear (self)`
* `clearEditText (self)`
* `QCompleter completer (self)`
* `contextMenuEvent (self, QContextMenuEvent?e)`
* `int count (self)`
* `int currentIndex (self)`
* `QString currentText (self)`
* `bool duplicatesEnabled (self)`
* `bool event (self, QEvent?event)`
* `int findData (self, QVariant?data, int?role?=?Qt.UserRole, Qt.MatchFlags?flags?=?Qt.MatchExactly|Qt.MatchCaseSensitive)`
* `int findText (self, QString?text, Qt.MatchFlags?flags?=?Qt.MatchExactly|Qt.MatchCaseSensitive)`
* `focusInEvent (self, QFocusEvent?e)`
* `focusOutEvent (self, QFocusEvent?e)`
* `bool hasFrame (self)`
* `hideEvent (self, QHideEvent?e)`
* `hidePopup (self)`
* `QSize iconSize (self)`
* `initStyleOption (self, QStyleOptionComboBox?option)`
* `inputMethodEvent (self, QInputMethodEvent)`
* `QVariant inputMethodQuery (self, Qt.InputMethodQuery)`
* `insertItem (self, int?index, QString?text, QVariant?userData?=?QVariant())`
* `insertItem (self, int?index, QIcon?icon, QString?text, QVariant?userData?=?QVariant())`
* `insertItems (self, int?index, QStringList?texts)`
* `InsertPolicy insertPolicy (self)`
* `insertSeparator (self, int?index)`
* `bool isEditable (self)`
* `QVariant itemData (self, int?index, int?role?=?Qt.UserRole)`
* `QAbstractItemDelegate itemDelegate (self)`
* `QIcon itemIcon (self, int?index)`
* `QString itemText (self, int?index)`
* `keyPressEvent (self, QKeyEvent?e)`
* `keyReleaseEvent (self, QKeyEvent?e)`
* `QLineEdit lineEdit (self)`
* `int maxCount (self)`
* `int maxVisibleItems (self)`
* `int minimumContentsLength (self)`
* `QSize minimumSizeHint (self)`
* `QAbstractItemModel model (self)`
* `int modelColumn (self)`
* `mousePressEvent (self, QMouseEvent?e)`
* `mouseReleaseEvent (self, QMouseEvent?e)`
* `paintEvent (self, QPaintEvent?e)`
* `removeItem (self, int?index)`
* `resizeEvent (self, QResizeEvent?e)`
* `QModelIndex rootModelIndex (self)`
* `setAutoCompletion (self, bool?enable)`
* `setAutoCompletionCaseSensitivity (self, Qt.CaseSensitivity?sensitivity)`
* `setCompleter (self, QCompleter?c)`
* `setCurrentIndex (self, int?index)`
* `setDuplicatesEnabled (self, bool?enable)`
* `setEditable (self, bool?editable)`
* `setEditText (self, QString?text)`
* `setFrame (self, bool)`
* `setIconSize (self, QSize?size)`
* `setInsertPolicy (self, InsertPolicy?policy)`
* `setItemData (self, int?index, QVariant?value, int?role?=?Qt.UserRole)`
* `setItemDelegate (self, QAbstractItemDelegate?delegate)`
* `setItemIcon (self, int?index, QIcon?icon)`
* `setItemText (self, int?index, QString?text)`
* `setLineEdit (self, QLineEdit?edit)`
* `setMaxCount (self, int?max)`
* `setMaxVisibleItems (self, int?maxItems)`
* `setMinimumContentsLength (self, int?characters)`
* `setModel (self, QAbstractItemModel?model)`
* `setModelColumn (self, int?visibleColumn)`
* `setRootModelIndex (self, QModelIndex?index)`
* `setSizeAdjustPolicy (self, SizeAdjustPolicy?policy)`
* `setValidator (self, QValidator?v)`
* `setView (self, QAbstractItemView?itemView)`
* `showEvent (self, QShowEvent?e)`
* `showPopup (self)`
* `SizeAdjustPolicy sizeAdjustPolicy (self)`
* `QSize sizeHint (self)`
* `QValidator validator (self)`
* `QAbstractItemView view (self)`
* `wheelEvent (self, QWheelEvent?e)`
### Special Methods
* `__len__ (self)`
### Qt Signals
* `void activated (int)`
* `void activated (const QString&)`
* `void currentIndexChanged (int)`
* `void currentIndexChanged (const QString&)`
* `void editTextChanged (const QString&)`
* `void highlighted (int)`
* `void highlighted (const QString&)`
* * *
## Detailed Description
該QComboBox表示widget是一個組合鍵,彈出的列表中。
一個QComboBox表示提供了展示的選項列表給用戶的方式,佔用屏幕空間的最小量的一種手段。
組合框是一個選擇窗口小部件,顯示當前的項目,可以彈出的選項列表。一個ComboBox可編輯,允許用戶修改列表中的每個項目。
組合框可以包含的像素圖和字符串;的[insertItem](qcombobox.html#insertItem)()和[setItemText](qcombobox.html#setItemText)( )函數進行適當超載。對于可編輯的組合框,該功能[clearEditText](qcombobox.html#clearEditText)( )設置,可清除顯示的字符串,不改變組合框的內容。
還有,如果一個組合框改變目前的項目發出的兩個信號,[currentIndexChanged](qcombobox.html#currentIndexChanged)()和[activated](qcombobox.html#activated)( ) 。[currentIndexChanged](qcombobox.html#currentIndexChanged)( )總是發出而不論這些變化以編程方式或通過用戶交互來完成的,而[activated](qcombobox.html#activated)()時的變化引起的用戶交互只射出。該[highlighted](qcombobox.html#highlighted)當用戶高亮顯示在組合框彈出列表中的一項( )信號被發射。有兩個版本,一個具有存在的所有三個信號[QString](qstring.html)參數和一個與`int`的說法。如果用戶選擇或突出顯示一個像素圖,只有`int`信號被發射。每當一個可編輯的組合框的文本改變了[editTextChanged](qcombobox.html#editTextChanged)()信號被發射。
當用戶進入可編輯ComboBox一個新的字符串,該部件可能會或可能不會插入它,它可以在多個位置插入。默認的策略是是[AtBottom](qcombobox.html#InsertPolicy-enum)但您可以使用此更改[setInsertPolicy](qcombobox.html#insertPolicy-prop)( ) 。
這是可能使用的輸入限制在一個可編輯的組合框[QValidator](qvalidator.html)見[setValidator](qcombobox.html#setValidator)( ) 。默認情況下,任何輸入被接受。
一個ComboBox可以使用插入功能來填充,[insertItem](qcombobox.html#insertItem)()和[insertItems](qcombobox.html#insertItems)( )為例。項目可以被改變[setItemText](qcombobox.html#setItemText)( ) 。一個項目可以被移除[removeItem](qcombobox.html#removeItem)( ) ,所有項目可以被刪除[clear](qcombobox.html#clear)( ) 。當前項的文本被退回[currentText](qcombobox.html#currentText-prop)( ) ,和一個編號項的文本與返回[text](index.htm#text)( ) 。目前的項目可以設置[setCurrentIndex](qcombobox.html#currentIndex-prop)( ) 。在組合框的項數是由返回[count](qcombobox.html#count-prop)();項目的最大數目可以被設置[setMaxCount](qcombobox.html#maxCount-prop)( ) 。您可以使用允許編輯[setEditable](qcombobox.html#editable-prop)( ) 。對于可編輯的組合框,您可以使用設置的自動完成功能[setCompleter](qcombobox.html#setCompleter)(用戶)以及是否可以添加重復設置與[setDuplicatesEnabled](qcombobox.html#duplicatesEnabled-prop)( ) 。
QComboBox表示使用[model/view framework](index.htm)其彈出的列表中,并存儲其物品。默認情況下,[QStandardItemModel](qstandarditemmodel.html)存儲的項目和一個[QListView](qlistview.html)子類顯示popuplist 。您可以訪問模型和視圖直接(與[model](qcombobox.html#model)()和[view](qcombobox.html#view)( ) ),但QComboBox表示還提供了功能設置和獲取項目數據(例如,[setItemData](qcombobox.html#setItemData)()和[itemText](qcombobox.html#itemText)())。您還可以設置一個新的模型和視圖(帶[setModel](qcombobox.html#setModel)()和[setView](qcombobox.html#setView)())。在組合框的標籤文本和圖標,在具有該模型的數據[Qt.DisplayRole](qt.html#ItemDataRole-enum)和[Qt.DecorationRole](qt.html#ItemDataRole-enum)被使用。請注意,您不能更改[SelectionMode](qabstractitemview.html#SelectionMode-enum)的[view](qcombobox.html#view)( ),例如,通過使用[setSelectionMode()](qabstractitemview.html#selectionMode-prop)。

* * *
## Type Documentation
```
QComboBox.InsertPolicy
```
此枚舉指定什么[QComboBox](qcombobox.html)應該做的,當一個新的字符串是由用戶輸入。
| Constant | Value | Description |
| --- | --- | --- |
| `QComboBox.NoInsert` | `0` | 該字符串不會被插入到組合框。 |
| `QComboBox.InsertAtTop` | `1` | 該字符串將被插入在組合框中的第一項。 |
| `QComboBox.InsertAtCurrent` | `2` | 目前的項目將_replaced_由該字符串。 |
| `QComboBox.InsertAtBottom` | `3` | 該字符串將在ComboBox中的最后一個項目之后插入。 |
| `QComboBox.InsertAfterCurrent` | `4` | 該字符串中的組合框的當前項后插入。 |
| `QComboBox.InsertBeforeCurrent` | `5` | 該字符串中的組合框的當前項之前插入。 |
| `QComboBox.InsertAlphabetically` | `6` | 該字符串被插入在組合框中的字母順序。 |
```
QComboBox.SizeAdjustPolicy
```
這個枚舉指定的怎么尺寸暗示[QComboBox](qcombobox.html)應調整當新內容被添加或內容的變化。
| Constant | Value | Description |
| --- | --- | --- |
| `QComboBox.AdjustToContents` | `0` | 組合框會一直調整到內容 |
| `QComboBox.AdjustToContentsOnFirstShow` | `1` | 組合框將被調整到它的內容在第一次被示出。 |
| `QComboBox.AdjustToMinimumContentsLength` | `2` | 使用AdjustToContents或AdjustToContentsOnFirstShow代替。 |
| `QComboBox.AdjustToMinimumContentsLengthWithIcon` | `3` | 組合框將被調整到[minimumContentsLength](qcombobox.html#minimumContentsLength-prop)加上一個圖標的空間。出于性能的考慮使用大型模型這一政策。 |
* * *
## Method Documentation
```
QComboBox.__init__ (self, QWidget?parent?=?None)
```
該_parent_的說法,如果不是沒有,原因_self_通過Qt的,而不是PyQt的擁有。
構造一個組合框與給定_parent_使用默認的模型[QStandardItemModel](qstandarditemmodel.html)。
```
QComboBox.addItem (self, QString?text, QVariant?userData?=?QVariant())
```
一個項添加到組合框與給定_text_,和包含指定_userData_(存儲在[Qt.UserRole](qt.html#ItemDataRole-enum)) 。該項目被添加到現有的項目列表。
```
QComboBox.addItem (self, QIcon?icon, QString?text, QVariant?userData?=?QVariant())
```
一個項添加到組合框與給定_icon_和_text_,和包含指定_userData_(存儲在[Qt.UserRole](qt.html#ItemDataRole-enum)) 。該項目被添加到現有的項目列表。
```
QComboBox.addItems (self, QStringList?texts)
```
把每個串中的給定_texts_到ComboBox 。每個項目會附加到反過來現有項目的清單。
```
bool QComboBox.autoCompletion (self)
```
```
Qt.CaseSensitivity QComboBox.autoCompletionCaseSensitivity (self)
```
[
```
QComboBox.changeEvent (self, QEvent?e)
```
](qt.html#CaseSensitivity-enum)
[從重新實現](qt.html#CaseSensitivity-enum)[QWidget.changeEvent](qwidget.html#changeEvent)( ) 。
```
QComboBox.clear (self)
```
這種方法也是一個Qt槽與C + +的簽名`void clear()`。
清除組合框,刪除所有項目。
注意:如果您已經在組合框中設置一個外部模型調用此功能時,此模式將仍然被清除。
```
QComboBox.clearEditText (self)
```
這種方法也是一個Qt槽與C + +的簽名`void clearEditText()`。
清除用于編輯的組合框的行編輯的內容。
```
QCompleter QComboBox.completer (self)
```
[
返回用于自動完成文字輸入的組合框的完成者。
這個函數中引入了Qt 4.2中。
](qcompleter.html)
[**See also**](qcompleter.html) [setCompleter](qcombobox.html#setCompleter)()和[editable](qcombobox.html#editable-prop)。
```
QComboBox.contextMenuEvent (self, QContextMenuEvent?e)
```
從重新實現[QWidget.contextMenuEvent](qwidget.html#contextMenuEvent)( ) 。
```
int QComboBox.count (self)
```
```
int QComboBox.currentIndex (self)
```
```
QString QComboBox.currentText (self)
```
```
bool QComboBox.duplicatesEnabled (self)
```
```
bool QComboBox.event (self, QEvent?event)
```
從重新實現[QObject.event](qobject.html#event)( ) 。
```
int QComboBox.findData (self, QVariant?data, int?role?=?Qt.UserRole, Qt.MatchFlags?flags?=?Qt.MatchExactly|Qt.MatchCaseSensitive)
```
返回該項目包含給定的索引_data_對于給定的_role_否則返回-1 。
該_flags_指定如何在ComboBox中的項目進行搜索。
```
int QComboBox.findText (self, QString?text, Qt.MatchFlags?flags?=?Qt.MatchExactly|Qt.MatchCaseSensitive)
```
返回該項目包含給定的索引_text_否則返回-1 。
該_flags_指定如何在ComboBox中的項目進行搜索。
```
QComboBox.focusInEvent (self, QFocusEvent?e)
```
從重新實現[QWidget.focusInEvent](qwidget.html#focusInEvent)( ) 。
```
QComboBox.focusOutEvent (self, QFocusEvent?e)
```
從重新實現[QWidget.focusOutEvent](qwidget.html#focusOutEvent)( ) 。
```
bool QComboBox.hasFrame (self)
```
```
QComboBox.hideEvent (self, QHideEvent?e)
```
從重新實現[QWidget.hideEvent](qwidget.html#hideEvent)( ) 。
```
QComboBox.hidePopup (self)
```
隱藏在組合框的項目列表,如果它是當前可見和復位內部狀態,所以,如果自定義彈出被證明里面的重新實現[showPopup](qcombobox.html#showPopup)( ) ,那么你還需要重新實現hidePopup ( )函數來隱藏你的自定義彈出并調用基類的實現來復位內部狀態時,您的自定義彈出窗口部件被隱藏。
**See also** [showPopup](qcombobox.html#showPopup)( ) 。
```
QSize QComboBox.iconSize (self)
```
[
```
QComboBox.initStyleOption (self, QStyleOptionComboBox?option)
```
](qsize.html)
[初始化_option_與其它的值](qsize.html)[QComboBox](qcombobox.html)。當他們需要一個這種方法是有用的子類[QStyleOptionComboBox](qstyleoptioncombobox.html),但不希望在所有的信息填寫自己。
**See also** [QStyleOption.initFrom](qstyleoption.html#initFrom)( ) 。
```
QComboBox.inputMethodEvent (self, QInputMethodEvent)
```
從重新實現[QWidget.inputMethodEvent](qwidget.html#inputMethodEvent)( ) 。
```
QVariant QComboBox.inputMethodQuery (self, Qt.InputMethodQuery)
```
從重新實現[QWidget.inputMethodQuery](qwidget.html#inputMethodQuery)( ) 。
```
QComboBox.insertItem (self, int?index, QString?text, QVariant?userData?=?QVariant())
```
插入_text_和_userData_(存儲在[Qt.UserRole](qt.html#ItemDataRole-enum))到ComboBox在給定的_index_。
如果該指數等于或大于總項數越高,新項目被添加到現有的項目列表。如果該指數為零或負數,則新項目追加到現有的項目清單。
**See also** [insertItems](qcombobox.html#insertItems)( ) 。
```
QComboBox.insertItem (self, int?index, QIcon?icon, QString?text, QVariant?userData?=?QVariant())
```
插入_icon_,_text_和_userData_(存儲在[Qt.UserRole](qt.html#ItemDataRole-enum))到ComboBox在給定的_index_。
如果該指數等于或大于總項數越高,新項目被添加到現有的項目列表。如果該指數為零或負數,則新項目追加到現有的項目清單。
**See also** [insertItems](qcombobox.html#insertItems)( ) 。
```
QComboBox.insertItems (self, int?index, QStringList?texts)
```
從插入字符串_list_到ComboBox作為單獨的項目,開始于_index_規定。
如果該指數等于或大于總項數越高,新項目被添加到現有的項目列表。如果該指數為零或負數,則新項目追加到現有的項目清單。
**See also** [insertItem](qcombobox.html#insertItem)( ) 。
```
InsertPolicy QComboBox.insertPolicy (self)
```
[
```
QComboBox.insertSeparator (self, int?index)
```
插入分隔項目到ComboBox在給定的_index_。
如果該指數等于或大于總項數越高,新項目被添加到現有的項目列表。如果該指數為零或負數,則新項目追加到現有的項目清單。
此功能被引入Qt的4.4 。
](qcombobox.html#InsertPolicy-enum)
[**See also**](qcombobox.html#InsertPolicy-enum) [insertItem](qcombobox.html#insertItem)( ) 。
```
bool QComboBox.isEditable (self)
```
```
QVariant QComboBox.itemData (self, int?index, int?role?=?Qt.UserRole)
```
返回數據為給定的_role_在給定的_index_在組合框,或[QVariant.Invalid](qvariant.html#Type-enum)如果沒有數據,這個作用。
**See also** [setItemData](qcombobox.html#setItemData)( ) 。
```
QAbstractItemDelegate QComboBox.itemDelegate (self)
```
[
返回所使用的彈出列表視圖中的項目委讬。
](qabstractitemdelegate.html)
[**See also**](qabstractitemdelegate.html) [setItemDelegate](qcombobox.html#setItemDelegate)( ) 。
```
QIcon QComboBox.itemIcon (self, int?index)
```
[
返回圖標為給定的_index_在組合框。
](qicon.html)
[**See also**](qicon.html) [setItemIcon](qcombobox.html#setItemIcon)( ) 。
```
QString QComboBox.itemText (self, int?index)
```
返回文本為給定的_index_在組合框。
**See also** [setItemText](qcombobox.html#setItemText)( ) 。
```
QComboBox.keyPressEvent (self, QKeyEvent?e)
```
從重新實現[QWidget.keyPressEvent](qwidget.html#keyPressEvent)( ) 。
```
QComboBox.keyReleaseEvent (self, QKeyEvent?e)
```
從重新實現[QWidget.keyReleaseEvent](qwidget.html#keyReleaseEvent)( ) 。
```
QLineEdit QComboBox.lineEdit (self)
```
[
返回用于在組合框,或0編輯項目,如果沒有行編輯的行編輯。
唯一可編輯的組合框有一個行編輯。
](qlineedit.html)
[**See also**](qlineedit.html) [setLineEdit](qcombobox.html#setLineEdit)( ) 。
```
int QComboBox.maxCount (self)
```
```
int QComboBox.maxVisibleItems (self)
```
```
int QComboBox.minimumContentsLength (self)
```
```
QSize QComboBox.minimumSizeHint (self)
```
[](qsize.html)
[從重新實現](qsize.html)[QWidget.minimumSizeHint](qwidget.html#minimumSizeHint-prop)( ) 。
```
QAbstractItemModel QComboBox.model (self)
```
[
返回所使用的組合框模型。
](qabstractitemmodel.html)
[**See also**](qabstractitemmodel.html) [setModel](qcombobox.html#setModel)( ) 。
```
int QComboBox.modelColumn (self)
```
```
QComboBox.mousePressEvent (self, QMouseEvent?e)
```
從重新實現[QWidget.mousePressEvent](qwidget.html#mousePressEvent)( ) 。
```
QComboBox.mouseReleaseEvent (self, QMouseEvent?e)
```
從重新實現[QWidget.mouseReleaseEvent](qwidget.html#mouseReleaseEvent)( ) 。
```
QComboBox.paintEvent (self, QPaintEvent?e)
```
從重新實現[QWidget.paintEvent](qwidget.html#paintEvent)( ) 。
```
QComboBox.removeItem (self, int?index)
```
刪除給定的項目_index_從組合框。如果索引中刪除這將更新當前的索引。
這個函數做什么,如果_index_超出范圍。
```
QComboBox.resizeEvent (self, QResizeEvent?e)
```
從重新實現[QWidget.resizeEvent](qwidget.html#resizeEvent)( ) 。
```
QModelIndex QComboBox.rootModelIndex (self)
```
[
返回根模型項目指數在ComboBox中的項目。
](qmodelindex.html)
[**See also**](qmodelindex.html) [setRootModelIndex](qcombobox.html#setRootModelIndex)( ) 。
```
QComboBox.setAutoCompletion (self, bool?enable)
```
```
QComboBox.setAutoCompletionCaseSensitivity (self, Qt.CaseSensitivity?sensitivity)
```
```
QComboBox.setCompleter (self, QCompleter?c)
```
設置_completer_使用而不是目前的完成者的。如果_completer_為0 ,自動完成被禁用。
默認情況下,一個可編輯的組合框,一個[QCompleter](qcompleter.html)執行不區分大小寫的直列完成自動創建。
這個函數中引入了Qt 4.2中。
**See also** [completer](qcombobox.html#completer)( ) 。
```
QComboBox.setCurrentIndex (self, int?index)
```
```
QComboBox.setDuplicatesEnabled (self, bool?enable)
```
```
QComboBox.setEditable (self, bool?editable)
```
```
QComboBox.setEditText (self, QString?text)
```
這種方法也是一個Qt槽與C + +的簽名`void setEditText(const QString&)`。
設置_text_在組合框的文本編輯。
```
QComboBox.setFrame (self, bool)
```
```
QComboBox.setIconSize (self, QSize?size)
```
```
QComboBox.setInsertPolicy (self, InsertPolicy?policy)
```
```
QComboBox.setItemData (self, int?index, QVariant?value, int?role?=?Qt.UserRole)
```
設置數據_role_在給定的產品_index_在組合框來指定_value_。
**See also** [itemData](qcombobox.html#itemData)( ) 。
```
QComboBox.setItemDelegate (self, QAbstractItemDelegate?delegate)
```
設置項_delegate_在彈出的列表視圖。組合框采用委讬的所有權。
**Warning:**你不應該共享組合框,控件映射程序或視圖之間的委讬的同一實例。否則會導致不正確或不直觀的編輯行為,因為在一個給定的委讬每個視圖可能會收到[closeEditor()](qabstractitemdelegate.html#closeEditor)信號,并試圖訪問,修改或關閉一個已經被關閉的編輯器。
**See also** [itemDelegate](qcombobox.html#itemDelegate)( ) 。
```
QComboBox.setItemIcon (self, int?index, QIcon?icon)
```
設置_icon_在給定的產品_index_在組合框。
**See also** [itemIcon](qcombobox.html#itemIcon)( ) 。
```
QComboBox.setItemText (self, int?index, QString?text)
```
設置_text_在給定的產品_index_在組合框。
**See also** [itemText](qcombobox.html#itemText)( ) 。
```
QComboBox.setLineEdit (self, QLineEdit?edit)
```
該_edit_說法有它的所有權轉移給Qt的。
設置行_edit_使用而不是目前的行編輯widget的。
組合框取行編輯的所有權。
**See also** [lineEdit](qcombobox.html#lineEdit)( ) 。
```
QComboBox.setMaxCount (self, int?max)
```
```
QComboBox.setMaxVisibleItems (self, int?maxItems)
```
```
QComboBox.setMinimumContentsLength (self, int?characters)
```
```
QComboBox.setModel (self, QAbstractItemModel?model)
```
設置模型是_model_。_model_不能為0 。如果你想清除一個模型的內容,請致電[clear](qcombobox.html#clear)( ) 。
**See also** [model](qcombobox.html#model)()和[clear](qcombobox.html#clear)( ) 。
```
QComboBox.setModelColumn (self, int?visibleColumn)
```
```
QComboBox.setRootModelIndex (self, QModelIndex?index)
```
設置根模型項目_index_在ComboBox中的項目。
**See also** [rootModelIndex](qcombobox.html#rootModelIndex)( ) 。
```
QComboBox.setSizeAdjustPolicy (self, SizeAdjustPolicy?policy)
```
```
QComboBox.setValidator (self, QValidator?v)
```
設置_validator_使用而不是目前的驗證器。
**See also** [validator](qcombobox.html#validator)( ) 。
```
QComboBox.setView (self, QAbstractItemView?itemView)
```
該_itemView_說法有它的所有權轉移給Qt的。
設置要使用的組合框彈出給定的視圖_itemView_。組合框采用該視圖的所有權。
注意:如果你想使用的便利性意見(如[QListWidget](qlistwidget.html),[QTableWidget](qtablewidget.html) or [QTreeWidget](qtreewidget.html)) ,請確保調用[setModel](qcombobox.html#setModel)( )在調用此函數之前的組合框與便利的小部件的模型。
**See also** [view](qcombobox.html#view)( ) 。
```
QComboBox.showEvent (self, QShowEvent?e)
```
從重新實現[QWidget.showEvent](qwidget.html#showEvent)( ) 。
```
QComboBox.showPopup (self)
```
顯示在組合框的項目列表。如果列表為空,則沒有項目將會顯示。
如果你重新實現這個函數來顯示一個自定義彈出,請確保您致電[hidePopup](qcombobox.html#hidePopup)()復位內部狀態。
**See also** [hidePopup](qcombobox.html#hidePopup)( ) 。
```
SizeAdjustPolicy QComboBox.sizeAdjustPolicy (self)
```
[](qcombobox.html#SizeAdjustPolicy-enum)
```
QSize QComboBox.sizeHint (self)
```
[](qsize.html)
[從重新實現](qsize.html)[QWidget.sizeHint](qwidget.html#sizeHint-prop)( ) 。
此實現緩存大小提示,以避免在調整大小時的內容動態改變。無效緩存的值改變[sizeAdjustPolicy](qcombobox.html#sizeAdjustPolicy-prop)。
```
QValidator QComboBox.validator (self)
```
[
返回用來限制文字輸入組合框的驗證。
](qvalidator.html)
[**See also**](qvalidator.html) [setValidator](qcombobox.html#setValidator)()和[editable](qcombobox.html#editable-prop)。
```
QAbstractItemView QComboBox.view (self)
```
[
返回用于組合框彈出列表視圖。
](qabstractitemview.html)
[**See also**](qabstractitemview.html) [setView](qcombobox.html#setView)( ) 。
```
QComboBox.wheelEvent (self, QWheelEvent?e)
```
從重新實現[QWidget.wheelEvent](qwidget.html#wheelEvent)( ) 。
```
QComboBox.__len__ (self)
```
* * *
## Qt Signal Documentation
```
void activated (int)
```
這是該信號的默認超載。
當用戶選擇在ComboBox中的項目,這個信號被發送。該項目的_index_被傳遞。請注意,即使在選擇時不改變此信號被發送。如果你需要知道什么時候該選擇實際上改變,使用信號[currentIndexChanged](qcombobox.html#currentIndexChanged)( ) 。
```
void activated (const QString&)
```
當用戶選擇在ComboBox中的項目,這個信號被發送。該項目的_text_被傳遞。請注意,即使在選擇時不改變此信號被發送。如果你需要知道什么時候該選擇實際上改變,使用信號[currentIndexChanged](qcombobox.html#currentIndexChanged)( ) 。
```
void currentIndexChanged (int)
```
這是該信號的默認超載。
這個信號被發送時的[currentIndex](qcombobox.html#currentIndex-prop)在組合框的變化既可以通過用戶交互或編程方式。該項目的_index_通過或-1,如果組合框為空或[currentIndex](qcombobox.html#currentIndex-prop)被重置。
這個函數是Qt 4.1中引入。
```
void currentIndexChanged (const QString&)
```
這個信號被發送時的[currentIndex](qcombobox.html#currentIndex-prop)在組合框的變化既可以通過用戶交互或編程方式。該項目的_text_被傳遞。
這個函數是Qt 4.1中引入。
```
void editTextChanged (const QString&)
```
這是該信號的默認超載。
當在組合框的行編輯插件的文本更改這個信號被發射。新的文本由指定_text_。
```
void highlighted (int)
```
這是該信號的默認超載。
當在組合框彈出列表中的項目是由用戶突出顯示該信號被發送。該項目的_index_被傳遞。
```
void highlighted (const QString&)
```
當在組合框彈出列表中的項目是由用戶突出顯示該信號被發送。該項目的_text_被傳遞。
- PyQt4 中文文檔
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- QTextTable Class Reference
- QTextTableCell Class Reference
- QTextTableCellFormat Class Reference
- QTextTableFormat Class Reference
- QThread Class Reference
- QThreadPool Class Reference
- QTime Class Reference
- QTimeEdit Class Reference
- QTimeLine Class Reference
- QTimer Class Reference
- QTimerEvent Class Reference
- QToolBar Class Reference
- QToolBox Class Reference
- QToolButton Class Reference
- QToolTip Class Reference
- QTouchEvent Class Reference
- Reference
- QTransform Class Reference
- QTranslator Class Reference
- QTreeView Class Reference
- QTreeWidget Class Reference
- QTreeWidgetItem Class Reference
- QTreeWidgetItemIterator Class Reference
- QUdpSocket Class Reference
- QUndoCommand Class Reference
- QUndoGroup Class Reference
- QUndoStack Class Reference
- QUndoView Class Reference
- QUrl Class Reference
- QUrlInfo Class Reference
- QUuid Class Reference
- QValidator Class Reference
- QVariant Class Reference
- QVariantAnimation Class Reference
- QVBoxLayout Class Reference
- QVector2D Class Reference
- QVector3D Class Reference
- QVector4D Class Reference
- QVideoFrame Class Reference
- QVideoSurfaceFormat Class Reference
- QWaitCondition Class Reference
- QWebDatabase Class Reference
- QWebElement Class Reference
- QWebElementCollection Class Reference
- QWebFrame Class Reference
- QWebHistory Class Reference
- QWebHistoryInterface Class Reference
- QWebHistoryItem Class Reference
- QWebHitTestResult Class Reference
- QWebInspector Class Reference
- QWebPage Class Reference
- QWebPluginFactory Class Reference
- QWebSecurityOrigin Class Reference
- QWebSettings Class Reference
- QWebView Class Reference
- QWhatsThis Class Reference
- QWhatsThisClickedEvent Class Reference
- QWheelEvent Class Reference
- QWidget Class Reference
- QWidgetAction Class Reference
- QWidgetItem Class Reference
- QWindowStateChangeEvent Class Reference
- QWizard Class Reference
- QWizardPage Class Reference
- QWorkspace Class Reference
- QWriteLocker Class Reference
- QX11EmbedContainer Class Reference
- QX11EmbedWidget Class Reference
- QX11Info Class Reference
- QXmlAttributes Class Reference
- QXmlContentHandler Class Reference
- QXmlDeclHandler Class Reference
- QXmlDefaultHandler Class Reference
- QXmlDTDHandler Class Reference
- QXmlEntityResolver Class Reference
- QXmlErrorHandler Class Reference
- QXmlFormatter Class Reference
- QXmlInputSource Class Reference
- QXmlItem Class Reference
- QXmlLexicalHandler Class Reference
- QXmlLocator Class Reference
- QXmlName Class Reference
- QXmlNamePool Class Reference
- QXmlNamespaceSupport Class Reference
- QXmlNodeModelIndex Class Reference
- QXmlParseException Class Reference
- QXmlQuery Class Reference
- QXmlReader Class Reference
- QXmlResultItems Class Reference
- QXmlSchema Class Reference
- QXmlSchemaValidator Class Reference
- QXmlSerializer Class Reference
- QXmlSimpleReader Class Reference
- QXmlStreamAttribute Class Reference
- QXmlStreamAttributes Class Reference
- QXmlStreamEntityDeclaration Class Reference
- QXmlStreamEntityResolver Class Reference
- QXmlStreamNamespaceDeclaration Class Reference
- QXmlStreamNotationDeclaration Class Reference
- QXmlStreamReader Class Reference
- QXmlStreamWriter Class Reference