Public Method setAlpha

static void setAlpha(int alpha)

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Parameter	Range	Description
alpha	0 ... 255	opacity value

Sets an opacity value used for subsequent graphic drawing and filling. If set to 0, no drawing will be done, an alpha of 255 means full opacity.

• The set alpha value is taken into account by all graphic (Graphic.displayLocalGraphic(int), Graphic.displayGraphicArea(int, int, int, int, int)) and filling (Draw.fillDisplay(), Draw.fillDisplayArea(int, int)) methods as well as shape drawing when filled (Draw.drawRectangle(int, int, int), Draw.drawStyledCircle(int, int)).
• The default value for alpha is 255. It will be automatically set to default on startup and by the methods General.resetAll() or General.rebootPanelController().

Example

Attribute.setAlpha(127);

All future drawing and filling will be done with half opacity.

Graphic.displayLocalGraphic(int)
Graphic.displayGraphicArea(int, int, int, int, int)
Draw.fillDisplay()
Draw.fillDisplayArea(int, int)
Draw.drawRectangle(int, int, int)
Draw.drawStyledCircle(int, int)