在Qt5.12中加入的渐变色预设值枚举。 关联函数：
代码语言：javascript复制inline void fillRect(int x, int y, int w, int h, QGradient::Preset preset);
inline void fillRect(const QRect &r, QGradient::Preset preset);
inline void fillRect(const QRectF &r, QGradient::Preset preset);该enum基于https://webgradients.com/中的gradient指定一组预定义的QGradient预设置。 枚举定义：
代码语言：javascript复制enum Preset {
WarmFlame = 1,
NightFade = 2,
SpringWarmth = 3,
JuicyPeach = 4,
YoungPassion = 5,
LadyLips = 6,
SunnyMorning = 7,
RainyAshville = 8,
FrozenDreams = 9,
WinterNeva = 10,
DustyGrass = 11,
TemptingAzure = 12,
HeavyRain = 13,
AmyCrisp = 14,
MeanFruit = 15,
DeepBlue = 16,
RipeMalinka = 17,
CloudyKnoxville = 18,
MalibuBeach = 19,
NewLife = 20,
TrueSunset = 21,
MorpheusDen = 22,
RareWind = 23,
NearMoon = 24,
WildApple = 25,
SaintPetersburg = 26,
PlumPlate = 28,
EverlastingSky = 29,
HappyFisher = 30,
Blessing = 31,
SharpeyeEagle = 32,
LadogaBottom = 33,
LemonGate = 34,
ItmeoBranding = 35,
ZeusMiracle = 36,
OldHat = 37,
StarWine = 38,
HappyAcid = 41,
AwesomePine = 42,
NewYork = 43,
ShyRainbow = 44,
MixedHopes = 46,
FlyHigh = 47,
StrongBliss = 48,
FreshMilk = 49,
SnowAgain = 50,
FebruaryInk = 51,
KindSteel = 52,
SoftGrass = 53,
GrownEarly = 54,
SharpBlues = 55,
ShadyWater = 56,
DirtyBeauty = 57,
GreatWhale = 58,
TeenNotebook = 59,
PoliteRumors = 60,
SweetPeriod = 61,
WideMatrix = 62,
SoftCherish = 63,
RedSalvation = 64,
BurningSpring = 65,
NightParty = 66,
SkyGlider = 67,
HeavenPeach = 68,
PurpleDivision = 69,
AquaSplash = 70,
SpikyNaga = 72,
LoveKiss = 73,
CleanMirror = 75,
PremiumDark = 76,
ColdEvening = 77,
CochitiLake = 78,
SummerGames = 79,
PassionateBed = 80,
MountainRock = 81,
DesertHump = 82,
JungleDay = 83,
PhoenixStart = 84,
OctoberSilence = 85,
FarawayRiver = 86,
AlchemistLab = 87,
OverSun = 88,
PremiumWhite = 89,
MarsParty = 90,
EternalConstance = 91,
JapanBlush = 92,
SmilingRain = 93,
CloudyApple = 94,
BigMango = 95,
HealthyWater = 96,
AmourAmour = 97,
RiskyConcrete = 98,
StrongStick = 99,
ViciousStance = 100,
PaloAlto = 101,
HappyMemories = 102,
MidnightBloom = 103,
Crystalline = 104,
PartyBliss = 106,
ConfidentCloud = 107,
LeCocktail = 108,
RiverCity = 109,
FrozenBerry = 110,
ChildCare = 112,
FlyingLemon = 113,
NewRetrowave = 114,
HiddenJaguar = 115,
AboveTheSky = 116,
Nega = 117,
DenseWater = 118,
Seashore = 120,
MarbleWall = 121,
CheerfulCaramel = 122,
NightSky = 123,
MagicLake = 124,
YoungGrass = 125,
ColorfulPeach = 126,
GentleCare = 127,
PlumBath = 128,
HappyUnicorn = 129,
AfricanField = 131,
SolidStone = 132,
OrangeJuice = 133,
GlassWater = 134,
NorthMiracle = 136,
FruitBlend = 137,
MillenniumPine = 138,
HighFlight = 139,
MoleHall = 140,
SpaceShift = 142,
ForestInei = 143,
RoyalGarden = 144,
RichMetal = 145,
JuicyCake = 146,
SmartIndigo = 147,
SandStrike = 148,
NorseBeauty = 149,
AquaGuidance = 150,
SunVeggie = 151,
SeaLord = 152,
BlackSea = 153,
GrassShampoo = 154,
LandingAircraft = 155,
WitchDance = 156,
SleeplessNight = 157,
AngelCare = 158,
CrystalRiver = 159,
SoftLipstick = 160,
SaltMountain = 161,
PerfectWhite = 162,
FreshOasis = 163,
StrictNovember = 164,
MorningSalad = 165,
DeepRelief = 166,
SeaStrike = 167,
NightCall = 168,
SupremeSky = 169,
LightBlue = 170,
MindCrawl = 171,
LilyMeadow = 172,
SugarLollipop = 173,
SweetDessert = 174,
MagicRay = 175,
TeenParty = 176,
FrozenHeat = 177,
GagarinView = 178,
FabledSunset = 179,
PerfectBlue = 180,
NumPresets
};红色线条框内为Qt中的枚举值，圆球的渐变色为该枚举值代表的颜色。
部分颜色图
