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SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectcom.trolltech.qt.QSignalEmitter
com.trolltech.qt.QtJambiObject
com.trolltech.qt.gui.QColor
public class QColor
The QColor class provides colors based on RGB, HSV or CMYK values.
A color is normally specified in terms of RGB (red, green, and blue) components, but it is also possible to specify it in terms of HSV (hue, saturation, and value) and CMYK (cyan, magenta, yellow and black) components. In addition a color can be specified using a color name. The color name can be any of the SVG 1.0 color names.
![]() | ![]() | ![]() |
RGB | HSV | CMYK |
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The QColor constructor creates the color based on RGB values. To create a QColor based on either HSV or CMYK values, use the toHsv and toCmyk functions respectively. These functions return a copy of the color using the desired format. In addition the static fromRgb, fromHsv and fromCmyk functions create colors from the specified values. Alternatively, a color can be converted to any of the three formats using the convertTo function (returning a copy of the color in the desired format), or any of the setRgb, setHsv and setCmyk functions altering this color's format. The spec function tells how the color was specified.
A color can be set by passing an RGB string (such as "#112233"), or a color name (such as "blue"), to the setNamedColor function. The color names are taken from the SVG 1.0 color names. The name function returns the name of the color in the format "#RRGGBB". Colors can also be set using setRgb, setHsv and setCmyk. To get a lighter or darker color use the lighter and darker functions respectively.
The isValid function indicates whether a QColor is legal at all. For example, a RGB color with RGB values out of range is illegal. For performance reasons, QColor mostly disregards illegal colors, and for that reason, the result of using an invalid color is undefined.
The color components can be retrieved individually, e.g with red, hue and cyan. The values of the color components can also be retrieved in one go using the getRgb(), getHsv() and getCmyk() functions. Using the RGB color model, the color components can in addition be accessed with rgb.
There are several related non-members: QRgb is a typdef for an unsigned int representing the RGB value triplet (r, g, b). Note that it also can hold a value for the alpha-channel (for more information, see the Alpha-Blended Drawing section). The qRed(), qBlue() and qGreen() functions return the respective component of the given QRgb value, while the qRgb() and qRgba() functions create and return the QRgb triplet based on the given component values. Finally, the qAlpha() function returns the alpha component of the provided QRgb, and the qGray() function calculates and return a gray value based on the given value.
QColor is platform and device independent. The QColormap class maps the color to the hardware.
For more information about painting in general, see The Paint System documentation.
QColor supports floating point precision and provides floating point versions of all the color components functions, e.g. getRgbF(), hueF and fromCmykF. Note that since the components are stored using 16-bit integers, there might be minor deviations between the values set using, for example, setRgbF and the values returned by the getRgbF() function due to rounding.
While the integer based functions take values in the range 0-255 (except hue which must have values within the range 0-359), the floating point functions accept values in the range 0.0 - 1.0.
QColor also support alpha-blended outlining and filling. The alpha channel of a color specifies the transparency effect, 0 represents a fully transparent color, while 255 represents a fully opaque color. For example:
// Specfiy semi-transparent red painter.setBrush(QColor(255, 0, 0, 127)); painter.drawRect(0, 0, width()/2, height()); // Specify semi-transparend blue painter.setBrush(QColor(0, 0, 255, 127)); painter.drawRect(0, 0, width(), height()/2);
The code above produces the following output:
Alpha-blended drawing is supported on Windows, Mac OS X, and on X11 systems that have the X Render extension installed.
The alpha channel of a color can be retrieved and set using the alpha and setAlpha functions if its value is an integer, and alphaF and setAlphaF if its value is qreal (double). By default, the alpha-channel is set to 255 (opaque). To retrieve and set all the RGB color components (including the alpha-channel) in one go, use the rgba and setRgba functions.
There are 20 predefined QColors: Qt::white, Qt::black, Qt::red, Qt::darkRed, Qt::green, Qt::darkGreen, Qt::blue, Qt::darkBlue, Qt::cyan, Qt::darkCyan, Qt::magenta, Qt::darkMagenta, Qt::yellow, Qt::darkYellow, Qt::gray, Qt::darkGray, Qt::lightGray, Qt::color0, Qt::color1, and Qt::transparent.
QColor provides the static colorNames function which returns a QStringList containing the color names Qt knows about.
The colors Qt::color0 (zero pixel value) and Qt::color1 (non-zero pixel value) are special colors for drawing in QBitmaps. Painting with Qt::color0 sets the bitmap bits to 0 (transparent, i.e. background), and painting with Qt::color1 sets the bits to 1 (opaque, i.e. foreground).
The RGB model is hardware-oriented. Its representation is close to what most monitors show. In contrast, HSV represents color in a way more suited to the human perception of color. For example, the relationships "stronger than", "darker than", and "the opposite of" are easily expressed in HSV but are much harder to express in RGB.
HSV, like RGB, has three components:
Here are some examples: pure red is H=0, S=255, V=255; a dark red, moving slightly towards the magenta, could be H=350 (equivalent to -10), S=255, V=180; a grayish light red could have H about 0 (say 350-359 or 0-10), S about 50-100, and S=255.
Qt returns a hue value of -1 for achromatic colors. If you pass a hue value that is too large, Qt forces it into range. Hue 360 or 720 is treated as 0; hue 540 is treated as 180.
In addition to the standard HSV model, Qt provides an alpha-channel to feature alpha-blended drawing.
While the RGB and HSV color models are used for display on computer monitors, the CMYK model is used in the four-color printing process of printing presses and some hard-copy devices.
CMYK has four components, all in the range 0-255: cyan (C), magenta (M), yellow (Y) and black (K). Cyan, magenta and yellow are called subtractive colors; the CMYK color model creates color by starting with a white surface and then subtracting color by applying the appropriate components. While combining cyan, magenta and yellow gives the color black, subtracting one or more will yield any other color. When combined in various percentages, these three colors can create the entire spectrum of colors.
Mixing 100 percent of cyan, magenta and yellow does produce black, but the result is unsatisfactory since it wastes ink, increases drying time, and gives a muddy colour when printing. For that reason, black is added in professional printing to provide a solid black tone; hence the term 'four color process'.
In addition to the standard CMYK model, Qt provides an alpha-channel to feature alpha-blended drawing.
Nested Class Summary | |
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static class |
QColor.Spec
The type of color specified, either RGB, HSV or CMYK. |
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
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QSignalEmitter.Signal0, QSignalEmitter.Signal1<A>, QSignalEmitter.Signal2<A,B>, QSignalEmitter.Signal3<A,B,C>, QSignalEmitter.Signal4<A,B,C,D>, QSignalEmitter.Signal5<A,B,C,D,E>, QSignalEmitter.Signal6<A,B,C,D,E,F>, QSignalEmitter.Signal7<A,B,C,D,E,F,G>, QSignalEmitter.Signal8<A,B,C,D,E,F,G,H>, QSignalEmitter.Signal9<A,B,C,D,E,F,G,H,I> |
Field Summary | |
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static QColor |
black
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static QColor |
blue
|
static QColor |
color0
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static QColor |
color1
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static QColor |
cyan
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static QColor |
darkBlue
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static QColor |
darkCyan
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static QColor |
darkGray
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static QColor |
darkGreen
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static QColor |
darkMagenta
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static QColor |
darkRed
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static QColor |
darkYellow
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static QColor |
gray
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static QColor |
green
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static QColor |
lightGray
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static QColor |
magenta
|
static QColor |
red
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static QColor |
transparent
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static QColor |
white
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static QColor |
yellow
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Constructor Summary | |
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QColor()
Constructs an invalid color with the RGB value (0, 0, 0). |
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QColor(int rgb)
Constructs a color with the value rgb. |
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QColor(int r,
int g,
int b)
Equivalent to QColor(r, g, b, 255). |
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QColor(int r,
int g,
int b,
int a)
Constructs a color with the RGB value r, g, b, and the alpha-channel (transparency) value of a. |
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QColor(QColor color)
Constructs a color that is a copy of color. |
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QColor(Qt.GlobalColor color)
Constructs a new color with a color value of color. |
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QColor(java.lang.String name)
Constructs a named color in the same way as setNamedColor using the given name. |
Method Summary | |
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int |
alpha()
Returns the alpha color component of this color. |
double |
alphaF()
Returns the alpha color component of this color. |
int |
black()
Returns the black color component of this color. |
double |
blackF()
Returns the black color component of this color. |
int |
blue()
Returns the blue color component of this color. |
double |
blueF()
Returns the blue color component of this color. |
static java.util.List<java.lang.String> |
colorNames()
Returns a QStringList containing the color names Qt knows about. |
QColor |
convertTo(QColor.Spec colorSpec)
Creates a copy of this color in the format specified by colorSpec. |
int |
cyan()
Returns the cyan color component of this color. |
double |
cyanF()
Returns the cyan color component of this color. |
QColor |
darker()
Equivalent to darker(200). |
QColor |
darker(int f)
Returns a darker (or lighter) color, but does not change this object. |
boolean |
equals(java.lang.Object other)
|
static QColor |
fromCmyk(int c,
int m,
int y,
int k)
Equivalent to fromCmyk(c, m, y, k, 255). |
static QColor |
fromCmyk(int c,
int m,
int y,
int k,
int a)
Static convenience function that returns a QColor constructed from the given CMYK color values: c (cyan), m (magenta), y (yellow), k (black), and a (alpha-channel, i.e. transparency). |
static QColor |
fromCmykF(double c,
double m,
double y,
double k)
Equivalent to fromCmykF(c, m, y, k, 1.0). |
static QColor |
fromCmykF(double c,
double m,
double y,
double k,
double a)
Static convenience function that returns a QColor constructed from the given CMYK color values: c (cyan), m (magenta), y (yellow), k (black), and a (alpha-channel, i.e. transparency). |
static QColor |
fromHsv(int h,
int s,
int v)
Equivalent to fromHsv(h, s, v, 255). |
static QColor |
fromHsv(int h,
int s,
int v,
int a)
Static convenience function that returns a QColor constructed from the HSV color values, h (hue), s (saturation), v (value), and a (alpha-channel, i.e. transparency). |
static QColor |
fromHsvF(double h,
double s,
double v)
Equivalent to fromHsvF(h, s, v, 1.0). |
static QColor |
fromHsvF(double h,
double s,
double v,
double a)
Static convenience function that returns a QColor constructed from the HSV color values, h (hue), s (saturation), v (value), and a (alpha-channel, i.e. transparency). |
static QColor |
fromNativePointer(QNativePointer nativePointer)
This function returns the QColor instance pointed to by nativePointer |
static QColor |
fromRgb(int rgb)
Static convenience function that returns a QColor constructed from the given QRgb value rgb. |
static QColor |
fromRgb(int r,
int g,
int b)
Equivalent to fromRgb(r, g, b, 255). |
static QColor |
fromRgb(int r,
int g,
int b,
int a)
Static convenience function that returns a QColor constructed from the RGB color values, r (red), g (green), b (blue), and a (alpha-channel, i.e. transparency). |
static QColor |
fromRgba(int rgba)
Static convenience function that returns a QColor constructed from the given QRgb value rgba. |
static QColor |
fromRgbF(double r,
double g,
double b)
Equivalent to fromRgbF(r, g, b, 1.0). |
static QColor |
fromRgbF(double r,
double g,
double b,
double a)
Static convenience function that returns a QColor constructed from the RGB color values, r (red), g (green), b (blue), and a (alpha-channel, i.e. transparency). |
int |
green()
Returns the green color component of this color. |
double |
greenF()
Returns the green color component of this color. |
int |
hue()
Returns the hue color component of this color. |
double |
hueF()
Returns the hue color component of this color. |
boolean |
isValid()
Returns true if the color is valid; otherwise returns false. |
QColor |
lighter()
Equivalent to lighter(150). |
QColor |
lighter(int f)
Returns a lighter (or darker) color, but does not change this object. |
int |
magenta()
Returns the magenta color component of this color. |
double |
magentaF()
Returns the magenta color component of this color. |
java.lang.String |
name()
Returns the name of the color in the format "#RRGGBB"; i.e. a "#" character followed by three two-digit hexadecimal numbers. |
static QNativePointer |
nativePointerArray(QColor[] array)
This function returns a QNativePointer that is pointing to the specified QColor array. |
void |
readFrom(QDataStream arg__1)
Reads a QColor from arg__1. |
int |
red()
Returns the red color component of this color. |
double |
redF()
Returns the red color component of this color. |
int |
rgb()
Returns the RGB value of the color. |
int |
rgba()
Returns the RGB value of the color. |
int |
saturation()
Returns the saturation color component of this color. |
double |
saturationF()
Returns the saturation color component of this color. |
void |
setAlpha(int alpha)
Sets the alpha of this color to alpha. |
void |
setAlphaF(double alpha)
Sets the alpha of this color to alpha. |
void |
setBlue(int blue)
Sets the blue color component of this color to blue. |
void |
setBlueF(double blue)
Sets the blue color component of this color to blue. |
void |
setCmyk(int c,
int m,
int y,
int k)
Equivalent to setCmyk(c, m, y, k, 255). |
void |
setCmyk(int c,
int m,
int y,
int k,
int a)
Sets the color to CMYK values, c (cyan), m (magenta), y (yellow), k (black), and a (alpha-channel, i.e. transparency). |
void |
setCmykF(double c,
double m,
double y,
double k)
Equivalent to setCmykF(c, m, y, k, 1.0). |
void |
setCmykF(double c,
double m,
double y,
double k,
double a)
Sets the color to CMYK values, c (cyan), m (magenta), y (yellow), k (black), and a (alpha-channel, i.e. transparency). |
void |
setGreen(int green)
Sets the green color component of this color to green. |
void |
setGreenF(double green)
Sets the green color component of this color to green. |
void |
setHsv(int h,
int s,
int v)
Equivalent to setHsv(h, s, v, 255). |
void |
setHsv(int h,
int s,
int v,
int a)
Sets a HSV color value; h is the hue, s is the saturation, v is the value and a is the alpha component of the HSV color. |
void |
setHsvF(double h,
double s,
double v)
Equivalent to setHsvF(h, s, v, 1.0). |
void |
setHsvF(double h,
double s,
double v,
double a)
Sets a HSV color value; h is the hue, s is the saturation, v is the value and a is the alpha component of the HSV color. |
void |
setNamedColor(java.lang.String name)
Sets the RGB value of this QColor to name, which may be in one of these formats: |
void |
setRed(int red)
Sets the red color component of this color to red. |
void |
setRedF(double red)
Sets the red color component of this color to red. |
void |
setRgb(int rgb)
Sets the RGB value to rgb, ignoring the alpha. |
void |
setRgb(int r,
int g,
int b)
Equivalent to setRgb(r, g, b, 255). |
void |
setRgb(int r,
int g,
int b,
int a)
Sets the RGB value to r, g, b and the alpha value to a. |
void |
setRgba(int rgba)
Sets the RGBA value to rgba. |
void |
setRgbF(double r,
double g,
double b)
Equivalent to setRgbF(r, g, b, 1.0). |
void |
setRgbF(double r,
double g,
double b,
double a)
Sets the color channels of this color to r (red), g (green), b (blue) and a (alpha, transparency). |
QColor.Spec |
spec()
Returns how the color was specified. |
QColor |
toCmyk()
Creates and returns a CMYK QColor based on this color. |
QColor |
toHsv()
Creates and returns an HSV QColor based on this color. |
QColor |
toRgb()
Create and returns an RGB QColor based on this color. |
java.lang.String |
toString()
Returns a string representation of this QColor. |
int |
value()
Returns the value color component of this color. |
double |
valueF()
Returns the value color component of this color. |
void |
writeTo(QDataStream arg__1)
Writes thisQColor to arg__1. |
int |
yellow()
Returns the yellow color component of this color. |
double |
yellowF()
Returns the yellow color component of this color. |
Methods inherited from class com.trolltech.qt.QtJambiObject |
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dispose, disposed, finalize, reassignNativeResources, tr, tr, tr |
Methods inherited from class com.trolltech.qt.QSignalEmitter |
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blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread |
Methods inherited from class java.lang.Object |
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clone, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface com.trolltech.qt.QtJambiInterface |
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disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership |
Field Detail |
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public static final QColor white
public static final QColor black
public static final QColor red
public static final QColor darkRed
public static final QColor green
public static final QColor darkGreen
public static final QColor blue
public static final QColor darkBlue
public static final QColor cyan
public static final QColor darkCyan
public static final QColor magenta
public static final QColor darkMagenta
public static final QColor yellow
public static final QColor darkYellow
public static final QColor gray
public static final QColor darkGray
public static final QColor lightGray
public static final QColor transparent
public static final QColor color0
public static final QColor color1
Constructor Detail |
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public QColor(int rgb)
Constructs a color with the value rgb. The alpha component is ignored and set to solid.
public QColor(Qt.GlobalColor color)
Constructs a new color with a color value of color.
Colors
public QColor(int r, int g, int b)
Equivalent to QColor(r, g, b, 255).
public QColor(int r, int g, int b, int a)
Constructs a color with the RGB value r, g, b, and the alpha-channel (transparency) value of a.
The color is left invalid if any of the arguments are invalid.
public QColor(QColor color)
Constructs a color that is a copy of color.
public QColor()
Constructs an invalid color with the RGB value (0, 0, 0). An invalid color is a color that is not properly set up for the underlying window system.
The alpha value of an invalid color is unspecified.
public QColor(java.lang.String name)
Constructs a named color in the same way as setNamedColor using the given name.
The color is left invalid if the name cannot be parsed.
Method Detail |
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public final int alpha()
Returns the alpha color component of this color.
Drawing
public final double alphaF()
Returns the alpha color component of this color.
Drawing
public final int black()
Returns the black color component of this color.
CMYK Color Model
public final double blackF()
Returns the black color component of this color.
CMYK Color Model
public final int blue()
Returns the blue color component of this color.
public final double blueF()
Returns the blue color component of this color.
public final QColor convertTo(QColor.Spec colorSpec)
Creates a copy of this color in the format specified by colorSpec.
public final int cyan()
Returns the cyan color component of this color.
CMYK Color Model
public final double cyanF()
Returns the cyan color component of this color.
CMYK Color Model
public final QColor darker()
Equivalent to darker(200).
public final QColor darker(int f)
Returns a darker (or lighter) color, but does not change this object.
If the f is greater than 100, this functions returns a darker color. Setting f to 300 returns a color that has one-third the brightness. If the f is less than 100, the return color is lighter, but we recommend using the lighter function for this purpose. If the f is 0 or negative, the return value is unspecified.
The function converts the current RGB color to HSV, divides the value (V) component by f and converts the color back to RGB.
public final int green()
Returns the green color component of this color.
public final double greenF()
Returns the green color component of this color.
public final int hue()
Returns the hue color component of this color.
HSV Color Model
public final double hueF()
Returns the hue color component of this color.
HSV Color Model
public final boolean isValid()
Returns true if the color is valid; otherwise returns false.
public final QColor lighter()
Equivalent to lighter(150).
public final QColor lighter(int f)
Returns a lighter (or darker) color, but does not change this object.
If the f is greater than 100, this functions returns a lighter color. Setting f to 150 returns a color that is 50% brighter. If the f is less than 100, the return color is darker, but we recommend using the darker function for this purpose. If the f is 0 or negative, the return value is unspecified.
The function converts the current RGB color to HSV, multiplies the value (V) component by f and converts the color back to RGB.
public final int magenta()
Returns the magenta color component of this color.
CMYK Color Model
public final double magentaF()
Returns the magenta color component of this color.
CMYK Color Model
public final java.lang.String name()
Returns the name of the color in the format "#RRGGBB"; i.e. a "#" character followed by three two-digit hexadecimal numbers.
public final void writeTo(QDataStream arg__1)
public final void readFrom(QDataStream arg__1)
public final int red()
Returns the red color component of this color.
public final double redF()
Returns the red color component of this color.
public final int rgb()
Returns the RGB value of the color. The alpha is stripped for compatibility.
public final int rgba()
Returns the RGB value of the color. Note that unlike rgb, the alpha is not stripped.
For an invalid color, the alpha value of the returned color is unspecified.
public final int saturation()
Returns the saturation color component of this color.
HSV Color Model
public final double saturationF()
Returns the saturation color component of this color.
HSV Color Model
public final void setAlpha(int alpha)
Sets the alpha of this color to alpha. Integer alpha is specified in the range 0-255.
Drawing
public final void setAlphaF(double alpha)
Sets the alpha of this color to alpha. qreal alpha is specified in the range 0.0-1.0.
Drawing
public final void setBlue(int blue)
Sets the blue color component of this color to blue. Int components are specified in the range 0-255.
public final void setBlueF(double blue)
Sets the blue color component of this color to blue. Float components are specified in the range 0.0-1.0.
public final void setCmyk(int c, int m, int y, int k)
Equivalent to setCmyk(c, m, y, k, 255).
public final void setCmyk(int c, int m, int y, int k, int a)
Sets the color to CMYK values, c (cyan), m (magenta), y (yellow), k (black), and a (alpha-channel, i.e. transparency).
All the values must be in the range 0-255.
CMYK Color Model
public final void setCmykF(double c, double m, double y, double k)
Equivalent to setCmykF(c, m, y, k, 1.0).
public final void setCmykF(double c, double m, double y, double k, double a)
Sets the color to CMYK values, c (cyan), m (magenta), y (yellow), k (black), and a (alpha-channel, i.e. transparency).
All the values must be in the range 0.0-1.0.
CMYK Color Model
public final void setGreen(int green)
Sets the green color component of this color to green. Int components are specified in the range 0-255.
public final void setGreenF(double green)
Sets the green color component of this color to green. Float components are specified in the range 0.0-1.0.
public final void setHsv(int h, int s, int v)
Equivalent to setHsv(h, s, v, 255).
public final void setHsv(int h, int s, int v, int a)
Sets a HSV color value; h is the hue, s is the saturation, v is the value and a is the alpha component of the HSV color.
The saturation, value and alpha-channel values must be in the range 0-255, and the hue value must be greater than -1.
HSV Color Model
public final void setHsvF(double h, double s, double v)
Equivalent to setHsvF(h, s, v, 1.0).
public final void setHsvF(double h, double s, double v, double a)
Sets a HSV color value; h is the hue, s is the saturation, v is the value and a is the alpha component of the HSV color.
All the values must be in the range 0.0-1.0.
HSV Color Model
public final void setNamedColor(java.lang.String name)
Sets the RGB value of this QColor to name, which may be in one of these formats:
The color is invalid if name cannot be parsed.
public final void setRed(int red)
Sets the red color component of this color to red. Int components are specified in the range 0-255.
public final void setRedF(double red)
Sets the red color component of this color to red. Float components are specified in the range 0.0-1.0.
public final void setRgb(int r, int g, int b)
Equivalent to setRgb(r, g, b, 255).
public final void setRgb(int r, int g, int b, int a)
Sets the RGB value to r, g, b and the alpha value to a.
All the values must be in the range 0-255.
public final void setRgb(int rgb)
Sets the RGB value to rgb, ignoring the alpha.
public final void setRgbF(double r, double g, double b)
Equivalent to setRgbF(r, g, b, 1.0).
public final void setRgbF(double r, double g, double b, double a)
Sets the color channels of this color to r (red), g (green), b (blue) and a (alpha, transparency).
All values must be in the range 0.0-1.0.
public final void setRgba(int rgba)
Sets the RGBA value to rgba. Note that unlike setRgb(QRgb rgb), this function does not ignore the alpha.
public final QColor.Spec spec()
Returns how the color was specified.
public final QColor toCmyk()
Creates and returns a CMYK QColor based on this color.
CMYK Color Model
public final QColor toHsv()
Creates and returns an HSV QColor based on this color.
HSV Color Model
public final QColor toRgb()
Create and returns an RGB QColor based on this color.
public final int value()
Returns the value color component of this color.
HSV Color Model
public final double valueF()
Returns the value color component of this color.
HSV Color Model
public final int yellow()
Returns the yellow color component of this color.
CMYK Color Model
public final double yellowF()
Returns the yellow color component of this color.
CMYK Color Model
public static java.util.List<java.lang.String> colorNames()
Returns a QStringList containing the color names Qt knows about.
Colors
public static QColor fromCmyk(int c, int m, int y, int k)
Equivalent to fromCmyk(c, m, y, k, 255).
public static QColor fromCmyk(int c, int m, int y, int k, int a)
Static convenience function that returns a QColor constructed from the given CMYK color values: c (cyan), m (magenta), y (yellow), k (black), and a (alpha-channel, i.e. transparency).
All the values must be in the range 0-255.
CMYK Color Model
public static QColor fromCmykF(double c, double m, double y, double k)
Equivalent to fromCmykF(c, m, y, k, 1.0).
public static QColor fromCmykF(double c, double m, double y, double k, double a)
Static convenience function that returns a QColor constructed from the given CMYK color values: c (cyan), m (magenta), y (yellow), k (black), and a (alpha-channel, i.e. transparency).
All the values must be in the range 0.0-1.0.
CMYK Color Model
public static QColor fromHsv(int h, int s, int v)
Equivalent to fromHsv(h, s, v, 255).
public static QColor fromHsv(int h, int s, int v, int a)
Static convenience function that returns a QColor constructed from the HSV color values, h (hue), s (saturation), v (value), and a (alpha-channel, i.e. transparency).
The value of s, v, and a must all be in the range 0-255; the value of h must be in the range 0-359.
HSV Color Model
public static QColor fromHsvF(double h, double s, double v)
Equivalent to fromHsvF(h, s, v, 1.0).
public static QColor fromHsvF(double h, double s, double v, double a)
Static convenience function that returns a QColor constructed from the HSV color values, h (hue), s (saturation), v (value), and a (alpha-channel, i.e. transparency).
All the values must be in the range 0.0-1.0.
HSV Color Model
public static QColor fromRgb(int rgb)
Static convenience function that returns a QColor constructed from the given QRgb value rgb.
Note that the alpha component of rgb is ignored (i.e. it is automatically set to 255), use the fromRgba function to include the alpha-channel specified by the given QRgb value.
public static QColor fromRgb(int r, int g, int b)
Equivalent to fromRgb(r, g, b, 255).
public static QColor fromRgb(int r, int g, int b, int a)
Static convenience function that returns a QColor constructed from the RGB color values, r (red), g (green), b (blue), and a (alpha-channel, i.e. transparency).
All the values must be in the range 0-255.
public static QColor fromRgbF(double r, double g, double b)
Equivalent to fromRgbF(r, g, b, 1.0).
public static QColor fromRgbF(double r, double g, double b, double a)
Static convenience function that returns a QColor constructed from the RGB color values, r (red), g (green), b (blue), and a (alpha-channel, i.e. transparency).
All the values must be in the range 0.0-1.0.
public static QColor fromRgba(int rgba)
Static convenience function that returns a QColor constructed from the given QRgb value rgba.
Note that unlike the fromRgb function, the alpha-channel specified by the given QRgb value is included.
public static QColor fromNativePointer(QNativePointer nativePointer)
nativePointer
- the QNativePointer of which object should be returned.public static QNativePointer nativePointerArray(QColor[] array)
array
- the array that the returned pointer will point to.
public boolean equals(java.lang.Object other)
equals
in class java.lang.Object
public java.lang.String toString()
toString
in class java.lang.Object
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