QStyleOptionComboBox 類

The QStyleOptionComboBox class is used to describe the parameter for drawing a combobox. 更多...

頭: #include <QStyleOptionComboBox>
qmake: QT += widgets
繼承: QStyleOptionComplex

公共類型

enum StyleOptionType { Type }
enum StyleOptionVersion { Version }

公共函數

QStyleOptionComboBox ()
QStyleOptionComboBox (const QStyleOptionComboBox & other )

公共變量

QIcon currentIcon
QString currentText
bool editable
bool frame
QSize iconSize
QRect popupRect

詳細描述

The QStyleOptionComboBox class is used to describe the parameter for drawing a combobox.

QStyleOptionButton contains all the information that QStyle 函數需要繪製 QComboBox .

For performance reasons, the access to the member variables is direct (i.e., using the . or -> operator). This low-level feel makes the structures straightforward to use and emphasizes that these are simply parameters used by the style functions.

對於可以如何使用樣式選項的演示範例,見 樣式 範例。

另請參閱 QStyleOption , QStyleOptionComplex ,和 QComboBox .

成員類型文檔編製

enum QStyleOptionComboBox:: StyleOptionType

This enum is used to hold information about the type of the style option, and is defined for each QStyleOption 子類。

常量 描述
QStyleOptionComboBox::Type SO_ComboBox 提供樣式選項的類型 ( SO_ComboBox 對於此類)。

類型內部使用通過 QStyleOption ,其子類,和 qstyleoption_cast () to determine the type of style option. In general you do not need to worry about this unless you want to create your own QStyleOption subclass and your own styles.

另請參閱 StyleOptionVersion .

enum QStyleOptionComboBox:: StyleOptionVersion

This enum is used to hold information about the version of the style option, and is defined for each QStyleOption 子類。

常量 描述
QStyleOptionComboBox::Version 1 1

版本的使用通過 QStyleOption 子類以實現擴展在不破壞兼容性的情況下。若使用 qstyleoption_cast (),通常不需要校驗它。

另請參閱 StyleOptionType .

成員函數文檔編製

QStyleOptionComboBox:: QStyleOptionComboBox ()

創建 QStyleOptionComboBox , initializing the members variables to their default values.

QStyleOptionComboBox:: QStyleOptionComboBox (const QStyleOptionComboBox & other )

構造副本為 other 樣式選項。

成員變量文檔編製

QIcon QStyleOptionComboBox:: currentIcon

This variable holds the icon for the current item of the combo box

默認值為空圖標 (即:圖標既沒有像素圖,也沒有文件名)。

QString QStyleOptionComboBox:: currentText

This variable holds the text for the current item of the combo box

默認值為空字符串。

bool QStyleOptionComboBox:: editable

This variable holds whether or not the combobox is editable or not

the default value is false

另請參閱 QComboBox::isEditable ().

bool QStyleOptionComboBox:: frame

This variable holds whether the combo box has a frame

默認值為 true。

QSize QStyleOptionComboBox:: iconSize

This variable holds the icon size for the current item of the combo box

默認值為 QSize (-1, -1),即:無效尺寸。

QRect QStyleOptionComboBox:: popupRect

This variable holds the popup rectangle for the combobox

The default value is a null rectangle, i.e. a rectangle with both the width and the height set to 0.

This variable is currently unused. You can safely ignore it.

另請參閱 QStyle::SC_ComboBoxListBoxPopup .