an abstract base class for various style classes
A GeoDataColorStyle is an abstract class that is the base class for a number of different style classes. It provides settings for specifying the color and color mode of the extended style classes. A GeoDataColorStyle should never be instantiated directly.
The color contains RGBA, (Red, Green, Blue, Alpha). Color and opacity (alpha) values have a range of 0 to 255 (00 to ff). For alpha, 00 is fully transparent and ff is fully opaque. For example, if you want to apply a blue color with 50 percent opacity to an overlay, you would specify the following: 7fff0000, where alpha=0x7f, blue=0xff, green=0x00, and red=0x00.
The color mode can either be normal (no effect) or random. A value of random applies a random linear scale to the base color as follows.
To achieve a truly random selection of colors, specify a base color of white (ffffffff). If you specify a single color component (for example, a value of ff0000ff for red), random color values for that one component (red) will be selected. In this case, the values would range from 00 (black) to ff (full red). If you specify values for two or for all three color components, a random linear scale is applied to each color component, with results ranging from black to the maximum values specified for each component. The opacity of a color comes from the alpha component of color and is never randomized.
- See also
Definition at line 58 of file GeoDataColorStyle.h.