Fonts are different type styles that can be used in various widgets. You load a font by name and get a handle in return. The handle you get allows you to set the font in the various widgets and font information calls.
XFont GetFont(char *fontname);
This function loads the font named by fontname and returns a handle to the font or NULL if there is an error. The handle returned by this function is an XFontStruct pointer, but should be treated as an opaque data type.
After you've loaded a font, you can then set that font in any widget that displays text. You can also use the handle in calls to TextWidget() and FontHeight() .
When you are done with a font, you should free it with FreeFont() .
SEE ALSO: SetWidgetFont() , FreeFont() , GetWidgetFont() , FontHeight() , TextWidth()
void SetWidgetFont(Widget w, XFont f);
This functions sets the font used by the widget `w', to be the font referred to by the argument `f'. The argument f should have been obtained with GetFont() .
SEE ALSO: GetFont() , FreeFont() , FontHeight() , TextWidth()
XFont GetWidgetFont(Widget w);
This function returns a handle to the font currently used by the Widget w. If an error occurs or there is no default font for the widget, a NULL is returned.
You should NOT call FreeFont() on any value returned by this function unless you are sure that you allocated the font with GetFont().
SEE ALSO: GetFont() , SetWidgetFont() , FontHeight() , TextWidth()
This function frees the resources associated with the font, f. You should call this function when your application is done using a particular font.
Of course you should make sure that no widget still uses the identified font.
SEE ALSO: SetWidgetFont() , GetFont()
This function returns an integer value that is the height in pixels of the specified font. The height is defined to be the ascent of the characters (from the baseline to the top of a capital letter) plus the descent of the characters (the distance from the baseline to bottom of a descender character like `g' or `p').
SEE ALSO: TextWidth() , GetFont() , SetWidgetFont()
int TextWidth(XFont f, char *txt);
This functions returns the width in pixels used by the string pointed to by txt in the font f. The string should be null-terminated and the entire string is used to determine the width.
SEE ALSO: FontHeight() , GetFont() , GetWidgetFont()