The QFontComboBox widget is a combobox that lets the user select a font family. 更多...
| 头： | #include <QFontComboBox> |
| qmake: | QT += widgets |
| Since: | Qt 4.2 |
| 继承： | QComboBox |
| enum | FontFilter { AllFonts, ScalableFonts, NonScalableFonts, MonospacedFonts, ProportionalFonts } |
| flags | FontFilters |
| QFontComboBox (QWidget * parent = nullptr) | |
| virtual | ~QFontComboBox () |
| QFont | currentFont () const |
| QFontComboBox::FontFilters | fontFilters () const |
| void | setFontFilters (QFontComboBox::FontFilters filters ) |
| void | setWritingSystem ( QFontDatabase::WritingSystem ) |
| QFontDatabase::WritingSystem | writingSystem () const |
| virtual QSize | sizeHint () const override |
| void | setCurrentFont (const QFont & f ) |
| void | currentFontChanged (const QFont & font ) |
| const QMetaObject | staticMetaObject |
| virtual bool | event (QEvent * e ) override |
The QFontComboBox widget is a combobox that lets the user select a font family.
The combobox is populated with an alphabetized list of font family names, such as Arial, Helvetica, and Times New Roman. Family names are displayed using the actual font when possible. For fonts such as Symbol, where the name is not representable in the font itself, a sample of the font is displayed next to the family name.
QFontComboBox is often used in toolbars, in conjunction with a QComboBox for controlling the font size and two QToolButton s for bold and italic.
When the user selects a new font, the currentFontChanged () signal is emitted in addition to currentIndexChanged ().
调用 setWritingSystem () to tell QFontComboBox to show only fonts that support a given writing system, and setFontFilters () to filter out certain types of fonts as e.g. non scalable fonts or monospaced fonts.
另请参阅 QComboBox , QFont , QFontInfo , QFontMetrics , QFontDatabase ，和 字符映射范例 .
This enum can be used to only show certain types of fonts in the font combo box.
| 常量 | 值 | 描述 |
|---|---|---|
QFontComboBox::AllFonts
|
0
|
Show all fonts |
QFontComboBox::ScalableFonts
|
0x1
|
Show scalable fonts |
QFontComboBox::NonScalableFonts
|
0x2
|
Show non scalable fonts |
QFontComboBox::MonospacedFonts
|
0x4
|
Show monospaced fonts |
QFontComboBox::ProportionalFonts
|
0x8
|
Show proportional fonts |
The FontFilters type is a typedef for QFlags <FontFilter>. It stores an OR combination of FontFilter values.
This property holds the currently selected font
访问函数：
| QFont | currentFont () const |
| void | setCurrentFont (const QFont & f ) |
通知程序信号：
| void | currentFontChanged (const QFont & font ) |
另请参阅 currentIndex and currentText .
This property holds the filter for the combobox
By default, all fonts are listed.
访问函数：
| QFontComboBox::FontFilters | fontFilters () const |
| void | setFontFilters (QFontComboBox::FontFilters filters ) |
另请参阅 writingSystem .
This property holds the writing system that serves as a filter for the combobox
若 script is QFontDatabase::Any (the default), all fonts are listed.
访问函数：
| QFontDatabase::WritingSystem | writingSystem () const |
| void | setWritingSystem ( QFontDatabase::WritingSystem ) |
另请参阅 fontFilters .
构造字体组合框采用给定 parent .
[虚拟]
QFontComboBox::
~QFontComboBox
()
销毁组合框。
[signal]
void
QFontComboBox::
currentFontChanged
(const
QFont
&
font
)
This signal is emitted whenever the current font changes, with the new font .
注意： 通知程序信号对于特性 currentFont .
另请参阅 currentFont .
[override virtual protected]
bool
QFontComboBox::
event
(
QEvent
*
e
)
重实现自 QComboBox::event ().
[override virtual]
QSize
QFontComboBox::
sizeHint
() const
重实现自 QComboBox::sizeHint ().