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java.lang.Objectcom.trolltech.qt.QSignalEmitter
com.trolltech.qt.QtJambiObject
com.trolltech.qt.gui.QBrush
public class QBrush
The QBrush class defines the fill pattern of shapes drawn by QPainter.
A brush has a style, a color, a gradient and a texture.
The brush style defines the fill pattern using the Qt::BrushStyle enum. The default brush style is Qt::NoBrush (depending on how you construct a brush). This style tells the painter to not fill shapes. The standard style for filling is Qt::SolidPattern. The style can be set when the brush is created using the appropriate constructor, and in addition the setStyle function provides means for altering the style once the brush is constructed.
The brush color defines the color of the fill pattern. The color can either be one of Qt's predefined colors, Qt::GlobalColor, or any other custom QColor. The currently set color can be retrieved and altered using the color and setColor functions, respectively.
The gradient defines the gradient fill used when the current style is either Qt::LinearGradientPattern, Qt::RadialGradientPattern or Qt::ConicalGradientPattern. Gradient brushes are created by giving a QGradient as a constructor argument when creating the QBrush. Qt provides three different gradients: QLinearGradient, QConicalGradient, and QRadialGradient - all of which inherit QGradient.
QRadialGradient gradient(50, 50, 50, 50, 50); gradient.setColorAt(0, QColor::fromRgbF(0, 1, 0, 1)); gradient.setColorAt(1, QColor::fromRgbF(0, 0, 0, 0)); QBrush brush(gradient);
The texture defines the pixmap used when the current style is Qt::TexturePattern. You can create a brush with a texture by providing the pixmap when the brush is created or by using setTexture.
Note that applying setTexture makes style == Qt::TexturePattern, regardless of previous style settings. Also, calling setColor will not make a difference if the style is a gradient. The same is the case if the style is Qt::TexturePattern style unless the current texture is a QBitmap.
The isOpaque function returns true if the brush is fully opaque otherwise false. A brush is considered opaque if:
![]() | To specify the style and color of lines and outlines, use the QPainter's pen combined with Qt::PenStyle and Qt::GlobalColor:QPainter painter(this); painter.setBrush(Qt::cyan); painter.setPen(Qt::darkCyan); painter.drawRect(0, 0, 100,100); painter.setBrush(Qt::NoBrush); painter.setPen(Qt::darkGreen); painter.drawRect(40, 40, 100, 100); Note that, by default, QPainter renders the outline (using the currently set pen) when drawing shapes. Use painter.setPen(Qt::NoPen) to disable this behavior. |
For more information about painting in general, see The Paint System documentation.
Nested Class Summary |
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Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
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QSignalEmitter.AbstractSignal, 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 QBrush |
NoBrush
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Constructor Summary | |
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QBrush()
Constructs a default black brush with the style Qt.:NoBrush (i.e. this brush will not fill shapes). |
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QBrush(QBrush brush)
Constructs a copy of brush. |
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QBrush(QColor color)
Equivalent to QBrush(color, Qt::SolidPattern). |
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QBrush(QColor color,
QPixmap pixmap)
Constructs a brush with the given color and the custom pattern stored in pixmap. |
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QBrush(QColor color,
Qt.BrushStyle bs)
Constructs a brush with the given color and bs. |
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QBrush(QGradient gradient)
Constructs a brush based on the given gradient. |
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QBrush(QImage image)
Constructs a brush with a black color and a texture set to the given image. |
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QBrush(QPixmap pixmap)
Constructs a brush with a black color and a texture set to the given pixmap. |
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QBrush(Qt.BrushStyle bs)
Constructs a black brush with the given bs. |
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QBrush(Qt.GlobalColor color,
QPixmap pixmap)
Constructs a brush with the given color and the custom pattern stored in pixmap. |
Method Summary | |
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QColor |
color()
Returns the brush color. |
boolean |
equals(java.lang.Object other)
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static QBrush |
fromNativePointer(QNativePointer nativePointer)
This function returns the QBrush instance pointed to by nativePointer |
QGradient |
gradient()
Returns the gradient describing this brush. |
boolean |
isOpaque()
Returns true if the brush is fully opaque otherwise false. |
QMatrix |
matrix()
Returns the current transformation matrix for the brush. |
static QNativePointer |
nativePointerArray(QBrush[] array)
This function returns a QNativePointer that is pointing to the specified QBrush array. |
void |
readFrom(QDataStream arg__1)
Reads a QBrush from arg__1. |
void |
setColor(QColor color)
Sets the brush color to the given color. |
void |
setColor(Qt.GlobalColor color)
Sets the brush color to the given color. |
void |
setMatrix(QMatrix mat)
Sets mat as an explicit transformation matrix on the current brush. |
void |
setStyle(Qt.BrushStyle arg__1)
Sets the brush style to arg__1. |
void |
setTexture(QPixmap pixmap)
Sets the brush pixmap to pixmap. |
void |
setTextureImage(QImage image)
Sets the brush image to image. |
void |
setTransform(QTransform arg__1)
Sets arg__1 as an explicit transformation matrix on the current brush. |
Qt.BrushStyle |
style()
Returns the brush style. |
QPixmap |
texture()
Returns the custom brush pattern, or a null pixmap if no custom brush pattern has been set. |
QImage |
textureImage()
Returns the custom brush pattern, or a null image if no custom brush pattern has been set. |
QTransform |
transform()
Returns the current transformation matrix for the brush. |
void |
writeTo(QDataStream arg__1)
Writes thisQBrush to arg__1. |
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, toString, 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 QBrush NoBrush
Constructor Detail |
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public QBrush(QPixmap pixmap)
Constructs a brush with a black color and a texture set to the given pixmap. The style is set to Qt::TexturePattern.
public QBrush(QColor color)
Equivalent to QBrush(color, Qt::SolidPattern).
public QBrush(QColor color, Qt.BrushStyle bs)
Constructs a brush with the given color and bs.
public QBrush(QColor color, QPixmap pixmap)
Constructs a brush with the given color and the custom pattern stored in pixmap.
The style is set to Qt::TexturePattern. The color will only have an effect for QBitmaps.
public QBrush()
Constructs a default black brush with the style Qt.:NoBrush (i.e. this brush will not fill shapes).
public QBrush(QBrush brush)
Constructs a copy of brush.
public QBrush(QGradient gradient)
Constructs a brush based on the given gradient.
The brush style is set to the corresponding gradient style (either Qt::LinearGradientPattern, Qt::RadialGradientPattern or Qt::ConicalGradientPattern).
public QBrush(Qt.BrushStyle bs)
Constructs a black brush with the given bs.
public QBrush(Qt.GlobalColor color, QPixmap pixmap)
Constructs a brush with the given color and the custom pattern stored in pixmap.
The style is set to Qt::TexturePattern. The color will only have an effect for QBitmaps.
public QBrush(QImage image)
Constructs a brush with a black color and a texture set to the given image. The style is set to Qt::TexturePattern.
Method Detail |
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public final QColor color()
Returns the brush color.
public final QGradient gradient()
Returns the gradient describing this brush.
public final boolean isOpaque()
Returns true if the brush is fully opaque otherwise false. A brush is considered opaque if:
public final QMatrix matrix()
Returns the current transformation matrix for the brush.
public final void writeTo(QDataStream arg__1)
public final void readFrom(QDataStream arg__1)
public final void setColor(Qt.GlobalColor color)
Sets the brush color to the given color.
public final void setColor(QColor color)
Sets the brush color to the given color.
Note that calling setColor will not make a difference if the style is a gradient. The same is the case if the style is Qt::TexturePattern style unless the current texture is a QBitmap.
public final void setMatrix(QMatrix mat)
Sets mat as an explicit transformation matrix on the current brush. The brush transformation matrix is merged with QPainter transformation matrix to produce the final result.
public final void setStyle(Qt.BrushStyle arg__1)
Sets the brush style to arg__1.
public final void setTexture(QPixmap pixmap)
Sets the brush pixmap to pixmap. The style is set to Qt::TexturePattern.
The current brush color will only have an effect for monochrome pixmaps, i.e. for QPixmap::depth() == 1 (QBitmaps).
public final void setTextureImage(QImage image)
Sets the brush image to image. The style is set to Qt::TexturePattern.
The current brush color will only have an effect for monochrome images, i.e. for QImage::depth() == 1.
public final void setTransform(QTransform arg__1)
Sets arg__1 as an explicit transformation matrix on the current brush. The brush transformation matrix is merged with QPainter transformation matrix to produce the final result.
public final Qt.BrushStyle style()
Returns the brush style.
public final QPixmap texture()
Returns the custom brush pattern, or a null pixmap if no custom brush pattern has been set.
public final QImage textureImage()
Returns the custom brush pattern, or a null image if no custom brush pattern has been set.
If the texture was set as a QPixmap it will be converted to a QImage.
public final QTransform transform()
Returns the current transformation matrix for the brush.
public static QBrush fromNativePointer(QNativePointer nativePointer)
nativePointer
- the QNativePointer of which object should be returned.public static QNativePointer nativePointerArray(QBrush[] array)
array
- the array that the returned pointer will point to.
public boolean equals(java.lang.Object other)
equals
in class java.lang.Object
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