JVCL Help:TJvCustomSegmentedLEDDisplay
JVCL Help: TJvCustomSegmentedLEDDisplay Class
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TJvCustomSegmentedLEDDisplay
TJvSegmentedLEDDisplay
run\JvSegmentedLEDDisplay.pas
Summary
Base segmented LED display control.
Pascal
run\JvSegmentedLEDDisplay.pas
TJvCustomSegmentedLEDDisplay = class(TJvGraphicControl);
Description
TJvCustomSegmentedLEDDisplay is the base control for segmented LED display. It provides the basic functionality of a segmented LED display (as used in classic calculators, VCR displays, car radio displays, etc). A segmented LED display allows to display numbers, characters and/or symbols. It does so by controlling a number of individual leds. Each LED is covered by a glass bar or dot to give it a proper orientation and layout. Each such LED is called a segment (hence the name 'segmented LED display'). The control simulates this by rendering the bars. It allows to use any color for the segments and allows to render both lit and unlit segments in two different colors (conventional LED displays often show unlit segments due to a backlight is being used (as sometimes used with LCD displays) or because a neighboring segment is lit and the optical separation is not good enough). The unlit segments are generally the same color as the lit segment but a lot darker. The control allows to use any layout by specifying a digit class. Each digit class can provide it's own layout and number of segments as well as specifying how to map characters to these segments. You should not instantiate a TJvCustomSegmentedLEDDisplay control, but rather one of it's descendants.
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