Wt: Painting system

Wt 3.3.0

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Classes | Enumerations
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::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 }
| Enumeration that indicates a fill 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.

To use inline SVG, you need to enable xhtml support in your configuration file by enabling send-xhtml-mimetype, see 10.2 General application settings (wt_config.xml).

## Enumeration Type Documentation

enum BrushStyle`[related]`

Enumeration that indicates a fill style.

Enumerator:

  NoBrush | Do not fill.
  SolidPattern | Fill with a solid color.

enum PenCapStyle`[related]`

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)

enum PenJoinStyle`[related]`

Enumeration that indicates how line joins are rendered.

Enumerator:

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

enum PenStyle`[related]`

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.

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