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Diffstat (limited to 'documentation/src/drawing.dox')
| -rw-r--r-- | documentation/src/drawing.dox | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/documentation/src/drawing.dox b/documentation/src/drawing.dox index f06fec31f..99fa231a7 100644 --- a/documentation/src/drawing.dox +++ b/documentation/src/drawing.dox @@ -240,6 +240,42 @@ The function fl_show_colormap() shows a table of colors and returns an Fl_Color index value. The Fl_Color_Chooser widget provides a standard RGB color chooser. +As the Fl_Color encoding maps to a 32-bit unsigned integer representing +RGBI, it is also possible to specify a color using a hex constant as a +color map index: +<pre> +// COLOR MAP INDEX +color(0x000000II) + ------ | + | | + | Color map index (8 bits) + Must be zero +</pre> +\code +button->color(0x000000ff); // colormap index #255 (FL_WHITE) +\endcode + +or specify a color using a hex constant for the RGB components: +<pre> +// RGB COLOR ASSIGNMENTS +color(0xRRGGBB00) + | | | | + | | | Must be zero + | | Blue (8 bits) + | Green (8 bits) + Red (8 bits) +</pre> +\code +button->color(0xff000000); // RGB: red +button->color(0x00ff0000); // RGB: green +button->color(0x0000ff00); // RGB: blue +button->color(0xffffff00); // RGB: white +\endcode + +\note +If TrueColor is not available, any RGB colors will be set to +the nearest entry in the colormap. + \subsection ssect_Lines Line Dashes and Thickness FLTK supports drawing of lines with different styles and |