diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gui/painting/qcolor.cpp | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/src/gui/painting/qcolor.cpp b/src/gui/painting/qcolor.cpp index d9b824b..4da993b 100644 --- a/src/gui/painting/qcolor.cpp +++ b/src/gui/painting/qcolor.cpp @@ -176,22 +176,25 @@ QT_BEGIN_NAMESPACE \section1 Predefined Colors - There are 20 predefined QColors: Qt::white, Qt::black, - Qt::red, Qt::darkRed, Qt::green, Qt::darkGreen, Qt::blue, - Qt::darkBlue, Qt::cyan, Qt::darkCyan, Qt::magenta, - Qt::darkMagenta, Qt::yellow, Qt::darkYellow, Qt::gray, - Qt::darkGray, Qt::lightGray, Qt::color0, Qt::color1, and - Qt::transparent. + There are 20 predefined QColors described by the Qt::GlobalColor enum, + including black, white, primary and secondary colors, darker versions + of these colors and three shades of gray. QColor also recognizes a + variety of color names; the static colorNames() function returns a + QStringList color names that QColor knows about. \img qt-colors.png Qt Colors - QColor provides the static colorNames() function which returns a - QStringList containing the color names Qt knows about. + Additionally, the Qt::color0, Qt::color1 and Qt::transparent colors + are used for special purposes. - The colors Qt::color0 (zero pixel value) and Qt::color1 (non-zero - pixel value) are special colors for drawing in QBitmaps. Painting with - Qt::color0 sets the bitmap bits to 0 (transparent, i.e. background), and - painting with Qt::color1 sets the bits to 1 (opaque, i.e. foreground). + Qt::color0 (zero pixel value) and Qt::color1 (non-zero pixel value) + are special colors for drawing in QBitmaps. Painting with Qt::color0 + sets the bitmap bits to 0 (transparent; i.e., background), and painting + with Qt::color1 sets the bits to 1 (opaque; i.e., foreground). + + Qt::transparent is used to indicate a transparent pixel. When painting + with this value, a pixel value will be used that is appropriate for the + underlying pixel format in use. \section1 The HSV Color Model |