30 ::Error(
"transp",
"failed to create new custom colors");
35 const Color_t redIndex = indices[0], greeIndex = indices[1];
37 new TColor(redIndex, 1., 0., 0.,
"red", 0.85);
38 new TColor(greeIndex, 0., 1., 0.,
"green", 0.5);
41 TCanvas *
const cnv =
new TCanvas(
"transparency",
"transparency demo", 600, 400);
45 Warning(
"transp",
"You can see the transparency ONLY in a pdf or png output (\"File\"->\"Save As\" ->...)\n"
46 "To have transparency in a canvas graphics, you need MacOSX version with cocoa enabled");
49 TH1F *
const hist =
new TH1F(
"a5",
"b5", 10, -2., 3.);
50 TH1F *
const hist2 =
new TH1F(
"c6",
"d6", 10, -3., 3.);
void Error(const char *location, const char *msgfmt,...)
Use this function in case an error occurred.
void Warning(const char *location, const char *msgfmt,...)
Use this function in warning situations.
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
TVirtualPad * cd(Int_t subpadnumber=0) override
Set current canvas & pad.
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.
unsigned FindFreeCustomColorIndices(Color_t(&indices)[N])