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Graphical text that can be drawn to a render target. More...
#include <SFML/Graphics/Text.hpp>
Public Types | |
enum | Style { Regular = 0 , Bold = 1 << 0 , Italic = 1 << 1 , Underlined = 1 << 2 , StrikeThrough = 1 << 3 } |
Enumeration of the string drawing styles. More... |
Public Member Functions | |
Text (const Font &font, String string="", unsigned int characterSize=30) | |
Construct the text from a string, font and size. | |
Text (const Font &&font, String string="", unsigned int characterSize=30)=delete | |
Disallow construction from a temporary font. | |
void | setString (const String &string) |
Set the text's string. | |
void | setFont (const Font &font) |
Set the text's font. | |
void | setFont (const Font &&font)=delete |
Disallow setting from a temporary font. | |
void | setCharacterSize (unsigned int size) |
Set the character size. | |
void | setLineSpacing (float spacingFactor) |
Set the line spacing factor. | |
void | setLetterSpacing (float spacingFactor) |
Set the letter spacing factor. | |
void | setStyle (std::uint32_t style) |
Set the text's style. | |
void | setFillColor (Color color) |
Set the fill color of the text. | |
void | setOutlineColor (Color color) |
Set the outline color of the text. | |
void | setOutlineThickness (float thickness) |
Set the thickness of the text's outline. | |
const String & | getString () const |
Get the text's string. | |
const Font & | getFont () const |
Get the text's font. | |
unsigned int | getCharacterSize () const |
Get the character size. | |
float | getLetterSpacing () const |
Get the size of the letter spacing factor. | |
float | getLineSpacing () const |
Get the size of the line spacing factor. | |
std::uint32_t | getStyle () const |
Get the text's style. | |
Color | getFillColor () const |
Get the fill color of the text. | |
Color | getOutlineColor () const |
Get the outline color of the text. | |
float | getOutlineThickness () const |
Get the outline thickness of the text. | |
Vector2f | findCharacterPos (std::size_t index) const |
Return the position of the index-th character. | |
FloatRect | getLocalBounds () const |
Get the local bounding rectangle of the entity. | |
FloatRect | getGlobalBounds () const |
Get the global bounding rectangle of the entity. | |
void | setPosition (Vector2f position) |
set the position of the object | |
void | setRotation (Angle angle) |
set the orientation of the object | |
void | setScale (Vector2f factors) |
set the scale factors of the object | |
void | setOrigin (Vector2f origin) |
set the local origin of the object | |
Vector2f | getPosition () const |
get the position of the object | |
Angle | getRotation () const |
get the orientation of the object | |
Vector2f | getScale () const |
get the current scale of the object | |
Vector2f | getOrigin () const |
get the local origin of the object | |
void | move (Vector2f offset) |
Move the object by a given offset. | |
void | rotate (Angle angle) |
Rotate the object. | |
void | scale (Vector2f factor) |
Scale the object. | |
const Transform & | getTransform () const |
get the combined transform of the object | |
const Transform & | getInverseTransform () const |
get the inverse of the combined transform of the object |
Graphical text that can be drawn to a render target.
sf::Text is a drawable class that allows to easily display some text with custom style and color on a render target.
It inherits all the functions from sf::Transformable: position, rotation, scale, origin. It also adds text-specific properties such as the font to use, the character size, the font style (bold, italic, underlined and strike through), the text color, the outline thickness, the outline color, the character spacing, the line spacing and the text to display of course. It also provides convenience functions to calculate the graphical size of the text, or to get the global position of a given character.
sf::Text works in combination with the sf::Font class, which loads and provides the glyphs (visual characters) of a given font.
The separation of sf::Font and sf::Text allows more flexibility and better performances: indeed a sf::Font is a heavy resource, and any operation on it is slow (often too slow for real-time applications). On the other side, a sf::Text is a lightweight object which can combine the glyphs data and metrics of a sf::Font to display any text on a render target.
It is important to note that the sf::Text instance doesn't copy the font that it uses, it only keeps a reference to it. Thus, a sf::Font must not be destructed while it is used by a sf::Text (i.e. never write a function that uses a local sf::Font instance for creating a text).
See also the note on coordinates and undistorted rendering in sf::Transformable.
Usage example:
enum sf::Text::Style |
Construct the text from a string, font and size.
Note that if the used font is a bitmap font, it is not scalable, thus not all requested sizes will be available to use. This needs to be taken into consideration when setting the character size. If you need to display text of a certain size, make sure the corresponding bitmap font that supports that size is used.
Disallow construction from a temporary font.
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nodiscard |
Return the position of the index-th character.
This function computes the visual position of a character from its index in the string. The returned position is in global coordinates (translation, rotation, scale and origin are applied). If index is out of range, the position of the end of the string is returned.
index | Index of the character |
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Get the text's font.
The returned reference is const, which means that you cannot modify the font when you get it from this function.
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Get the global bounding rectangle of the entity.
The returned rectangle is in global coordinates, which means that it takes into account the transformations (translation, rotation, scale, ...) that are applied to the entity. In other words, this function returns the bounds of the text in the global 2D world's coordinate system.
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get the inverse of the combined transform of the object
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Get the size of the letter spacing factor.
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Get the size of the line spacing factor.
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Get the local bounding rectangle of the entity.
The returned rectangle is in local coordinates, which means that it ignores the transformations (translation, rotation, scale, ...) that are applied to the entity. In other words, this function returns the bounds of the entity in the entity's coordinate system.
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Get the outline thickness of the text.
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get the orientation of the object
The rotation is always in the range [0, 360].
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Get the text's string.
The returned string is a sf::String, which can automatically be converted to standard string types. So, the following lines of code are all valid:
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get the combined transform of the object
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inherited |
Move the object by a given offset.
This function adds to the current position of the object, unlike setPosition which overwrites it. Thus, it is equivalent to the following code:
offset | Offset |
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Rotate the object.
This function adds to the current rotation of the object, unlike setRotation which overwrites it. Thus, it is equivalent to the following code:
angle | Angle of rotation |
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Scale the object.
This function multiplies the current scale of the object, unlike setScale which overwrites it. Thus, it is equivalent to the following code:
factor | Scale factors |
void sf::Text::setCharacterSize | ( | unsigned int | size | ) |
Set the character size.
The default size is 30.
Note that if the used font is a bitmap font, it is not scalable, thus not all requested sizes will be available to use. This needs to be taken into consideration when setting the character size. If you need to display text of a certain size, make sure the corresponding bitmap font that supports that size is used.
size | New character size, in pixels |
void sf::Text::setFillColor | ( | Color | color | ) |
Set the fill color of the text.
By default, the text's fill color is opaque white. Setting the fill color to a transparent color with an outline will cause the outline to be displayed in the fill area of the text.
color | New fill color of the text |
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delete |
Disallow setting from a temporary font.
void sf::Text::setFont | ( | const Font & | font | ) |
Set the text's font.
The font argument refers to a font that must exist as long as the text uses it. Indeed, the text doesn't store its own copy of the font, but rather keeps a pointer to the one that you passed to this function. If the font is destroyed and the text tries to use it, the behavior is undefined.
font | New font |
void sf::Text::setLetterSpacing | ( | float | spacingFactor | ) |
Set the letter spacing factor.
The default spacing between letters is defined by the font. This factor doesn't directly apply to the existing spacing between each character, it rather adds a fixed space between them which is calculated from the font metrics and the character size. Note that factors below 1 (including negative numbers) bring characters closer to each other. By default the letter spacing factor is 1.
spacingFactor | New letter spacing factor |
void sf::Text::setLineSpacing | ( | float | spacingFactor | ) |
Set the line spacing factor.
The default spacing between lines is defined by the font. This method enables you to set a factor for the spacing between lines. By default the line spacing factor is 1.
spacingFactor | New line spacing factor |
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inherited |
set the local origin of the object
The origin of an object defines the center point for all transformations (position, scale, rotation). The coordinates of this point must be relative to the top-left corner of the object, and ignore all transformations (position, scale, rotation). The default origin of a transformable object is (0, 0).
origin | New origin |
void sf::Text::setOutlineColor | ( | Color | color | ) |
Set the outline color of the text.
By default, the text's outline color is opaque black.
color | New outline color of the text |
void sf::Text::setOutlineThickness | ( | float | thickness | ) |
Set the thickness of the text's outline.
By default, the outline thickness is 0.
Be aware that using a negative value for the outline thickness will cause distorted rendering.
thickness | New outline thickness, in pixels |
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inherited |
set the position of the object
This function completely overwrites the previous position. See the move function to apply an offset based on the previous position instead. The default position of a transformable object is (0, 0).
position | New position |
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set the orientation of the object
This function completely overwrites the previous rotation. See the rotate function to add an angle based on the previous rotation instead. The default rotation of a transformable object is 0.
angle | New rotation |
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void sf::Text::setString | ( | const String & | string | ) |
Set the text's string.
The string argument is a sf::String, which can automatically be constructed from standard string types. So, the following calls are all valid:
A text's string is empty by default.
string | New string |
void sf::Text::setStyle | ( | std::uint32_t | style | ) |
Set the text's style.
You can pass a combination of one or more styles, for example sf::Text::Bold | sf::Text::Italic. The default style is sf::Text::Regular.
style | New style |