29 ::Error(
"grad2",
"can not allocate new custom colors");
34 const Color_t customRed = freeIndices[0], grad1 = freeIndices[1];
35 const Color_t customGreen = freeIndices[2], grad2 = freeIndices[3];
38 TCanvas *
const cnv =
new TCanvas(
"gradient demo 2",
"gradient demo 2", 100, 100, 800, 600);
41 ::Error(
"grad2",
"This macro works only on OS X with --enable-cocoa");
48 new TColor(customRed, 1., 0., 0.,
"red", 0.5);
58 const Double_t locations[] = {0., 1.};
64 gradFill1->
SetStartEnd(Point(0., 0.), Point(0., 1.));
67 new TColor(customGreen, 0., 1., 0.,
"green", 0.5);
74 gradFill2->
SetStartEnd(Point(0., 0), Point(0., 1.));
76 TH1F *
const hist =
new TH1F(
"a2",
"b2", 10, -2., 3.);
77 TH1F *
const hist2 =
new TH1F(
"c3",
"d3", 10, -3., 3.);
void Error(const char *location, const char *msgfmt,...)
Use this function in case an error occurred.
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
The color creation and management class.
1-D histogram with a float per channel (see TH1 documentation)
virtual void FillRandom(TF1 *f1, Int_t ntimes=5000, TRandom *rng=nullptr)
void Draw(Option_t *option="") override
Draw this histogram with options.
void SetStartEnd(const Point &p1, const Point &p2)
Set end and start.
unsigned FindFreeCustomColorIndices(Color_t(&indices)[N])