2 curses library IO processing-character attribute functions

2.4 character attribute functions

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2.4.1 chtype description

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* The chtype type contains two parts of information: one part contains the information about the character itself, and the other part contains the attributes related to the character. These attributes allow the character to be displayed in different ways, including reverse display, bold, color changing, underline, etc.

* When a character is passed as a parameter to a function, these attributes can be directly used | combined with characters, and multiple attributes can be used directly | used to combine attributes

2.4.2 character attribute list

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Attribute value description

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A_NORMAL Standard Display Mode

A_BLANK flashes

A_BOLD bold

A_DIM translucent

A_REVERSE reverse display

A_STANDOUT highlight

A_UNDERLINE underline

A_ALTCHARSET substitution Character Set

COLOR_PAIR (n) specifies the background color and foreground color of a character.

A_CHARTEXT and chtype can be extracted with the & Operator

A_ATTRIBUTES and chtype attributes can be extracted using the & operator

A_COLOR and chtype can be extracted with the & operator symbol.

2.4.3 set/cancel character attributes

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/** @ Brief: sets the default character attribute for character output. After setting, all text characters are affected by this attribute. @ note: attrset (0) can be used) to disable all attributes */int attrset (chtype attrs);/** @ brief to open certain attributes */int attron (chtype attrs ); /** @ brief disable certain attributes */int attroff (chtype attrs);/** @ brief highlight attributes A_STANDOUT */int standout () on the current screen (); /** @ brief works the same way as attrset (0). Disable all attributes */int standend ();

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