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## com.trolltech.qt.gui
Class QBrush

    java.lang.Object
      com.trolltech.qt.internal.QSignalEmitterInternal
          com.trolltech.qt.QSignalEmitter
              com.trolltech.qt.QtJambiObject
                  com.trolltech.qt.gui.QBrush

All Implemented Interfaces:
  QtJambiInterface, java.lang.Cloneable

    public class QBrush

extends QtJambiObject
implements java.lang.Cloneable

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 =
                new QRadialGradient(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 = new QBrush(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:

- The alpha component of the `color()` is 255.
- Its `texture()` does not have an alpha channel and is not a `QBitmap`.
- The colors in the `gradient()` all have an alpha component that is 255.

| To specify the style and color of lines and outlines, use the `QPainter`'s `pen` combined with `Qt::PenStyle` and `Qt::GlobalColor` :
            QPainter painter = new QPainter(this);

            painter.setBrush(QColor.cyan);
            painter.setPen(QColor.darkCyan);
            painter.drawRect(0, 0, 100,100);

            painter.setBrush(QBrush.NoBrush);
            painter.setPen(QColor.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)` `painter.setPen(Qt::NoPen)` to disable this behavior.

For more information about painting in general, see The Paint System documentation.

See also:
  `Qt::BrushStyle` , `QPainter`, and `QColor`.

Nested Class Summary

Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter
`QSignalEmitter.AbstractSignal, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9`

Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal`

Field Summary
`static QBrush` | `NoBrush`

Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`currentSender`

Constructor Summary
`QBrush()` Constructs a default black brush with the style `Qt::NoBrush` (i.e.
`QBrush(QBrush brush)` Constructs a copy of `other`.
`QBrush(QColor color)` Constructs a brush with the given `color` and `style`.
`QBrush(QColor color, QPixmap pixmap)` Constructs a brush with the given `color` and the custom pattern stored in `pixmap`.
`QBrush(QColor color, Qt.BrushStyle bs)` Constructs a brush with the given `color` and `style`.
`QBrush(QGradient gradient)` Constructs a brush based on the given `gradient`.
`QBrush(QImage image)` Constructs a brush with a black color and a texture set to the given `image`.
`QBrush(QPixmap pixmap)` Constructs a brush with a black color and a texture set to the given `pixmap`.
`QBrush(Qt.BrushStyle bs)` Constructs a black brush with the given `style`.
`QBrush(Qt.GlobalColor color, QPixmap pixmap)` Constructs a brush with the given `color` and the custom pattern stored in `pixmap`.

Method Summary
`QBrush` | `clone()` This method is reimplemented for internal reasons
`QColor` | `color()` Returns the brush color.
`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.
`void` | `readFrom(QDataStream arg__1)` Reads a QBrush
`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 `matrix` as an explicit transformation matrix on the current brush.
`void` | `setStyle(Qt.BrushStyle arg__1)` Sets the brush style to `style`.
`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 `matrix` 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.
`java.lang.String` | `toString()` Returns a string representation of the `this QBrush`.
`QTransform` | `transform()` Returns the current transformation matrix for the brush.
`void` | `writeTo(QDataStream arg__1)` Writes thisQBrush

Methods inherited from class com.trolltech.qt.QtJambiObject
`dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr`

Methods inherited from class com.trolltech.qt.QSignalEmitter
`blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread`

Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`__qt_signalInitialization`

Methods inherited from class java.lang.Object
`getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface com.trolltech.qt.QtJambiInterface
`disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership`

Field Detail

### NoBrush

    public static final QBrush NoBrush

Constructor Detail

### QBrush

    public QBrush()

  Constructs a default black brush with the style `Qt::NoBrush` (i.e. this brush will not fill shapes).

### QBrush

    public QBrush(Qt.BrushStyle bs)

  Constructs a black brush with the given `style`.

See also:
  `setStyle()`.

### QBrush

    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.

See also:
  `setColor()`, and setPixmap().

### QBrush

    public QBrush(QBrush brush)

  Constructs a copy of `other`.

### QBrush

    public QBrush(QColor color)

  Constructs a brush with the given `color` and `style`.

See also:
  `setColor()`, and `setStyle()`.

### QBrush

    public QBrush(QColor color,
                  Qt.BrushStyle bs)

  Constructs a brush with the given `color` and `style`.

See also:
  `setColor()`, and `setStyle()`.

### QBrush

    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.

See also:
  `setColor()`, and setPixmap().

### QBrush

    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` ).

### QBrush

    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` .

See also:
  `setTextureImage()`.

### QBrush

    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` .

See also:
  `setTexture()`.

Method Detail

### color

    public final QColor color()

  Returns the brush color.

See also:
  `setColor()`.

### gradient

    public final QGradient gradient()

  Returns the gradient describing this brush.

### isOpaque

    public final boolean isOpaque()

  Returns true if the brush is fully opaque otherwise false. A brush is considered opaque if:
  - The alpha component of the `color()` is 255.
  - Its `texture()` does not have an alpha channel and is not a `QBitmap`.
  - The colors in the `gradient()` all have an alpha component that is 255.

### matrix

    public final QMatrix matrix()

  Returns the current transformation matrix for the brush.

See also:
  `setMatrix()`.

### writeTo

    public final void writeTo(QDataStream arg__1)

  Writes thisQBrush

### readFrom

    public final void readFrom(QDataStream arg__1)

  Reads a QBrush

### setColor

    public final void setColor(Qt.GlobalColor color)

  Sets the brush color to the given `color`.

### setColor

    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`.

See also:
  `color()`.

### setMatrix

    public final void setMatrix(QMatrix mat)

  Sets `matrix` as an explicit transformation matrix on the current brush. The brush transformation matrix is merged with `QPainter` transformation matrix to produce the final result.

See also:
  `matrix()`.

### setStyle

    public final void setStyle(Qt.BrushStyle arg__1)

  Sets the brush style to `style`.

See also:
  `style()`.

### setTexture

    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`).

See also:
  `texture()`.

### setTextureImage

    public final void setTextureImage(QImage image)

  Sets the brush image to `image`. The style is set to `Qt::TexturePattern` .

  Note the current brush color will not have any affect on monochrome images, as opposed to calling `setTexture()` with a `QBitmap`. If you want to change the color of monochrome image brushes, either convert the image to `QBitmap` with `QBitmap::fromImage()` and set the resulting `QBitmap` as a texture, or change the entries in the color table for the image.

See also:
  `textureImage()`, and `setTexture()`.

### setTransform

    public final void setTransform(QTransform arg__1)

  Sets `matrix` as an explicit transformation matrix on the current brush. The brush transformation matrix is merged with `QPainter` transformation matrix to produce the final result.

See also:
  `transform()`.

### style

    public final Qt.BrushStyle style()

  Returns the brush style.

See also:
  `setStyle()`.

### texture

    public final QPixmap texture()

  Returns the custom brush pattern, or a null pixmap if no custom brush pattern has been set.

See also:
  `setTexture()`.

### textureImage

    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`.

See also:
  `setTextureImage()`.

### transform

    public final QTransform transform()

  Returns the current transformation matrix for the brush.

See also:
  `setTransform()`.

### toString

    public java.lang.String toString()

  Returns a string representation of the `this QBrush`.

  Overrides:
    `toString` in class `java.lang.Object`

### clone

    public QBrush clone()

  This method is reimplemented for internal reasons

  Overrides:
    `clone` in class `java.lang.Object`

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