Painting system

Classes that provide support for vector graphics painting. More...

Classes
class	Wt::WBrush
	A value class that defines the style for filling a path. More...
class	Wt::WCanvasPaintDevice
	A paint device for rendering using the HTML 5 <canvas> element. More...
class	Wt::WColor
	A value class that defines a color. More...
class	Wt::WFont
	A value class that describes a font. More...
class	Wt::WGradient
	A linear or radial gradient. More...
class	Wt::WLineF
	Utility class that defines a single line. More...
class	Wt::WPaintDevice
	The abstract base class for a paint device. More...
class	Wt::WPaintedWidget
	A widget that is painted using vector graphics. More...
class	Wt::WPainter
	Vector graphics painting class. More...
class	Wt::WPainterPath
	A path defining a shape. More...
class	Wt::WPdfImage
	A paint device for rendering to a PDF. More...
class	Wt::WPen
	A value class that defines the style for pen strokes. More...
class	Wt::WPointF
	A value class that defines a 2D point. More...
class	Wt::WRasterImage
	A paint device for rendering to a raster image. More...
class	Wt::WRectF
	A value class that defines a rectangle. More...
class	Wt::WShadow
	A value class that defines a shadow style. More...
class	Wt::WSvgImage
	A paint device for rendering using Scalable Vector Graphics (SVG). More...
class	Wt::WTransform
	A value class that defines a 2D affine transformation matrix. More...
class	Wt::WVectorImage
	An abstract paint device for rendering using native vector graphics. More...
class	Wt::WVmlImage
	A paint device for rendering using the VML pseudo-standard. More...

Enumerations
enum	Wt::PenStyle {   Wt::NoPen, Wt::SolidLine, Wt::DashLine, Wt::DotLine,   Wt::DashDotLine, Wt::DashDotDotLine }
	Enumeration that indicates a pen style. More...
enum	Wt::PenCapStyle { Wt::FlatCap, Wt::SquareCap, Wt::RoundCap }
	Enumeration that indicates how line end points are rendered. More...
enum	Wt::PenJoinStyle { Wt::MiterJoin, Wt::BevelJoin, Wt::RoundJoin }
	Enumeration that indicates how line joins are rendered. More...
enum	Wt::BrushStyle { Wt::NoBrush, Wt::SolidPattern, Wt::GradientPattern }
	Enumeration that indicates a fill style. More...
enum	Wt::GradientStyle { Wt::LinearGradient, Wt::RadialGradient }
	Enumeration that indicates a gradient style. More...

Detailed Description

Classes that provide support for vector graphics painting.

Wt provides a vector graphics painting system, which depending on the browser support, uses one of four different methods to paint the graphics (inline SVG, inline VML, HTML 5 <canvas> or a raster image). Vector graphics has as benefit a lower bandwidth usage compared to raster images, indepedent of the image size. To use the paint system, you need to specialize WPaintedWidget and use a WPainter to paint the contents of the widget inside its WPaintedWidget::paintEvent().

In addition, a PDF backend is included in the library, which can be used to make a PDF version of a painting, or to embed a painting in a PDF document.

Enumeration Type Documentation

BrushStyle

enum Wt::BrushStyle

Enumeration that indicates a fill style.

Enumerator
NoBrush	Do not fill.
SolidPattern	Fill with a solid color.
GradientPattern	Fill with a color gradient.

GradientStyle

enum Wt::GradientStyle

Enumeration that indicates a gradient style.

Enumerator
LinearGradient	Linear gradient.
RadialGradient	Radial gradient.

PenCapStyle

enum Wt::PenCapStyle

Enumeration that indicates how line end points are rendered.

Enumerator
FlatCap	Flat ends.
SquareCap	Square ends (prolongs line with half width)
RoundCap	Round ends (terminates with a half circle)

PenJoinStyle

enum Wt::PenJoinStyle

Enumeration that indicates how line joins are rendered.

Enumerator
MiterJoin	Pointy joins.
BevelJoin	Squared-off joins.
RoundJoin	Rounded joins.

PenStyle

enum Wt::PenStyle

Enumeration that indicates a pen style.

Enumerator
NoPen	Do not stroke.
SolidLine	Stroke with a solid line.
DashLine	Stroked with a dashed line.
DotLine	Stroke with a dotted line.
DashDotLine	Stroke with a dash dot line.
DashDotDotLine	Stroke with a dash dot dot line.