Function

Summary

Draws the pinboard objects which intersect a given rectangle in a pinboard-layout.

Package

capi

Signature

draw-pinboard-layout-objects pinboard-layout graphics-port x y width height => nil

Arguments

pinboard-layout

A pinboard-layout.

graphics-port

A graphics port.

x , y , width , height

Non-negative integers.

Values

draw-pinboard-layout-objects returns nil.

Description

The function draw-pinboard-layout-objects draws the pinboard objects in pinboard-layout which intersect the rectangle specified by x , y , width and height into the graphics port graphics-port .

graphics-port can be pinboard-layout itself or another graphics port. The drawing is done into the target rectangle, but may also draw outside it.

Notes

1. draw-pinboard-layout-objects is used by pinboard-layout when it actually needs to display the objects.
2. draw-pinboard-layout-objects does not do any caching. The display-callback of pinboard-layout does any caching, and may use draw-pinboard-layout-objects to draw into a cache (a pixmap) rather than the screen.
3. draw-pinboard-layout-objects is useful when you want to have your own display-callback for a pinboard-layout or a subclass. It is possible to use a graphics transformation on graphics-port around the call to draw-pinboard-layout-objects to affect the drawing. For example with-graphics-translation can be used to move the drawing to the origin.

See also

pinboard-layout
pinboard-layout-display
Creating Panes with Your Own Drawing and Input