javafx.css.SizeUnits Maven / Gradle / Ivy
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package javafx.css;
import javafx.scene.text.Font;
/**
* Represents a size specified in a particular unit, such as 14px or 0.2em.
*
* @since 9
*/
public enum SizeUnits {
/**
* Represents a size as a percentage.
*/
PERCENT(false) {
@Override
public String toString() { return "%"; }
@Override
public double points(double value, double multiplier, Font font_not_used) {
return (value/100.0) * multiplier;
}
@Override
public double pixels(double value, double multiplier, Font font_not_used) {
return (value/100.0) * multiplier;
}
},
/**
* Represents a size in inches.
*/
IN(true) {
@Override
public String toString() { return "in"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
return value * POINTS_PER_INCH;
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
return value * DOTS_PER_INCH;
}
},
/**
* Represents a size in centimeters.
*/
CM(true) {
@Override
public String toString() { return "cm"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
return (value / CM_PER_INCH) * POINTS_PER_INCH;
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
return (value / CM_PER_INCH) * DOTS_PER_INCH;
}
},
/**
* Represents a size in millimeters.
*/
MM(true) {
@Override
public String toString() { return "mm"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
return (value / MM_PER_INCH) * POINTS_PER_INCH;
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
return (value / MM_PER_INCH) * DOTS_PER_INCH;
}
},
/**
* Represents a size in EM unit.
* Note: It is a unit relative to the font-size of the element.
*/
EM(false) {
@Override
public String toString() { return "em"; }
@Override
public double points(double value, double multiplier_not_used, Font font) {
return round(value * pointSize(font));
}
@Override
public double pixels(double value, double multiplier_not_used, Font font) {
return round(value * pixelSize(font));
}
},
/**
* Represents a size in EX unit.
* Note: In the absence of font metrics, one {@code EX} is taken to be half an {@code EM} unit.
*/
EX(false) {
@Override
public String toString() { return "ex"; }
// In the absence of font metrics, one ex is taken to be half an em
@Override
public double points(double value, double multiplier_not_used, Font font) {
return round(value / 2.0 * pointSize(font));
}
// In the absence of font metrics, one ex is taken to be half an em
@Override
public double pixels(double value, double multiplier_not_used, Font font) {
return round(value / 2.0 * pixelSize(font));
}
},
/**
* Represents a size in points.
*/
PT(true) {
@Override
public String toString() { return "pt"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
return value;
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
return value * (DOTS_PER_INCH / POINTS_PER_INCH);
}
},
/**
* Represents a size in picas.
*/
PC(true) {
@Override
public String toString() { return "pc"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
return value * POINTS_PER_PICA;
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
return (value * POINTS_PER_PICA) * (DOTS_PER_INCH / POINTS_PER_INCH);
}
},
/**
* Represents a size in pixels.
*/
PX(true) {
@Override
public String toString() { return "px"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
return value * (POINTS_PER_INCH / DOTS_PER_INCH);
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
return value;
}
},
/**
* Represents an angle in degrees.
*/
DEG(true) {
@Override
public String toString() { return "deg"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
return round(value);
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
return round(value);
}
},
/**
* Represents an angle in gradians.
* Note: 400 Gradians = 360 Degrees.
*/
GRAD(true) {
@Override
public String toString() { return "grad"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
// convert to degrees - 360deg = 400grad
return round(value*9/10);
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
// convert to degrees - 360deg = 400grad
return round(value*9/10);
}
},
/**
* Represents an angle in radians.
*/
RAD(true) {
@Override
public String toString() { return "rad"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
// convert to degrees - 360deg = 2pi rad
return round(value*180/Math.PI);
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
// convert to degrees - 360deg = 2pi rad
return round(value*180/Math.PI);
}
},
/**
* Represents an angle in turns.
* Note: 1 Turn = 360 Degrees.
*/
TURN(true) {
@Override
public String toString() { return "turn"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
// convert to degrees - 360deg = 1 turn
return round(value*360);
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
return round(value*360);
}
},
/**
* Represents time in seconds.
*/
S(true) {
@Override
public String toString() { return "s"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
return value;
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
return value;
}
},
/**
* Represents time in milliseconds.
*/
MS(true) {
@Override
public String toString() { return "ms"; }
@Override
public double points(double value, double multiplier_not_used, Font font_not_used) {
return value;
}
@Override
public double pixels(double value, double multiplier_not_used, Font font_not_used) {
return value;
}
};
/**
* Calculates points for a particular {@code SizeUnits}.
* @param value value
* @param multiplier multiplier
* @param font font
* @return points for a particular {@code SizeUnits}
*/
public abstract double points(double value, double multiplier, Font font);
/**
* Calculates pixels for a particular {@code SizeUnits}.
* @param value value
* @param multiplier multiplier
* @param font font
* @return pixels for a particular {@code SizeUnits}
*/
public abstract double pixels(double value, double multiplier, Font font);
private SizeUnits(boolean absolute) {
this.absolute = absolute;
}
private final boolean absolute;
/**
* Gets wehther this {@code SizeUnits} value is absolute.
* @return whether value is absoulute
*/
public boolean isAbsolute() {
return absolute;
}
// RT-14711: The spec says 1px is equal to 0.75pt
// 72 / 0.75 = 96
static final private double DOTS_PER_INCH = 96.0;
static final private double POINTS_PER_INCH = 72.0;
static final private double CM_PER_INCH = 2.54;
static final private double MM_PER_INCH = CM_PER_INCH * 10;
static final private double POINTS_PER_PICA = 12.0;
/* Get the font size in points */
private static double pointSize(Font font) {
return pixelSize(font) * (POINTS_PER_INCH/DOTS_PER_INCH);
}
/* Get the font size in pixels to points */
private static double pixelSize(Font font) {
return (font != null) ? font.getSize() : Font.getDefault().getSize();
}
/* round to nearest 10th */
private static double round(double d) {
if (d == 0) return d;
final double r = (d < 0) ? -0.05 : 0.05;
return ((long)((d + r) * 10)) / 10.0;
}
}
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