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Wt
4.10.0
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A value class that describes a CSS length. More...
#include <Wt/WLength.h>
Public Types | |
| typedef LengthUnit | Unit |
| Typedef for enum Wt::LengthUnit. | |
Public Member Functions | |
| WLength () | |
| Creates an 'auto' length. | |
| template<std::size_t N> | |
| WLength (const char(&str)[N]) | |
| Creates a length by parsing the argument as a css length string. | |
| WLength (const std::string &str) | |
| Creates a length by parsing the argument as a css length string. | |
| WLength (double value, LengthUnit unit=LengthUnit::Pixel) | |
| Creates a length with value and unit. | |
| bool | isAuto () const |
| Returns whether the length is 'auto'. | |
| double | value () const |
| Returns the value. | |
| LengthUnit | unit () const |
| Returns the unit. | |
| const std::string | cssText () const |
| Returns the CSS text. | |
| bool | operator== (const WLength &other) const |
| Comparison operator. | |
| bool | operator!= (const WLength &other) const |
| Comparison operator. | |
| double | toPixels (double fontSize=16.0) const |
| Returns the (approximate) length in pixels. | |
Static Public Attributes | |
| static WLength | Auto |
| An 'auto' length. | |
A value class that describes a CSS length.
The class combines a value with a unit. There is a special value auto which has a different meaning depending on the context.
| Wt::WLength::WLength | ( | ) |
| Wt::WLength::WLength | ( | const char(&) | str[N] | ) |
Creates a length by parsing the argument as a css length string.
This supports all CSS length formats that have an API counterpart.
This is an overload for the std::string version that accepts a string literal.
| Wt::WLength::WLength | ( | const std::string & | str | ) |
Creates a length by parsing the argument as a css length string.
This supports all CSS length formats that have an API counterpart.
| Wt::WLength::WLength | ( | double | value, |
| LengthUnit | unit = LengthUnit::Pixel |
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| ) |
Creates a length with value and unit.
This constructor is also used for the implicit conversion of a double to a WLength, assuming a pixel unit.
| double Wt::WLength::toPixels | ( | double | fontSize = 16.0 | ) | const |
Returns the (approximate) length in pixels.
When the length isAuto(), 0 is returned, otherwise the approximate length in pixels.
| LengthUnit Wt::WLength::unit | ( | ) | const |
Returns the unit.
| double Wt::WLength::value | ( | ) | const |
Returns the value.