Brightsign Object Reference Manual (FW 5.1) Manuale Utente Scaricare il pdf (Pagina 63)

o When this function is enabled, each call to SetLayer, ClearLayer, or Clear results in a redraw. If you

need to change multiple layers, then you should disable auto redraw while calling the SetLayer function.

o SetLayer enables or disables redrawing of the widget when layer content is changed. When auto-redraw is

enabled, each call to SetLayer, ClearLayer, or Clear results in a redraw. To batch multiple updates

together, you should first suspend drawing using EnableAutoRedraw(false), then make the changes to

the content, and finally re-enable drawing using EnableAutoRedraw(true). The redraw happens in a

separate thread, so EnableAutoRedraw returns almost immediately.

Object Content

The content specified in each layer can consist of one or more objects. Each object is defined by an roAssociativeArray.

If there is more than one object, then each is placed into an roArray prior to passing to the SetLayer function. Currently,

there are four object types:

1. Background color

• color: The #[aa]rrggbb hex value of the background color

• targetRect: A target rectangle, which is another roAssociativeArray consisting of x, y, w, and h values. These

values are relative to the top left corner of the widget.

2. Text

• text: A string of text to display

• targetRect: The rectangle in which the text is displayed

• textAttrs: An roAssociativeArray containing attributes to be applied to the text. The attributes can be any of the

following:

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Brightsign Object Reference Manual (FW 5.1) Manuale Utente Pagina 63