Missing includes.

tutorials/gl/grad2.C

@@ -23,17 +23,17 @@ void grad2()
    //to avoid possible conflicts with other tutorials.
    Color_t freeIndices[4] = {};
    if (ROOT::GLTutorials::FindFreeCustomColorIndices(freeIndices) != 4) {
-      Error("grad2", "can not allocate new custom colors");
+      ::Error("grad2", "can not allocate new custom colors");
       return;
    }
    
-   //Make sure canvas supports OpenGL.
-   gStyle->SetCanvasPreferGL(kTRUE);
-
    //'Aliases' (instead of freeIndices[someIndex])
    const Color_t customRed = freeIndices[0], grad1 = freeIndices[1];
    const Color_t customGreen = freeIndices[2], grad2 = freeIndices[3];
 
+   //Make sure canvas supports OpenGL.
+   gStyle->SetCanvasPreferGL(kTRUE);
+
    //2. Check that we have a canvas with an OpenGL support.
    TCanvas * const cnv = new TCanvas("gradiend demo 2", "gradient demo 2", 100, 100, 800, 600);
    if (!cnv->UseGL()) {
@@ -63,7 +63,7 @@ void grad2()
    
    typedef TColorGradient::Point Point;
    //Starting and ending points for a gradient fill (it's a vertical gradient):
-   gradFill1->SetStartEnd(Point(0., 0.), Point(0., 1));
+   gradFill1->SetStartEnd(Point(0., 0.), Point(0., 1.));
 
    //   c) Custom semi-transparent green.
    new TColor(customGreen, 0., 1., 0., "green", 0.5);
@@ -73,10 +73,10 @@ void grad2()
    
    TLinearGradient * const gradFill2 = new TLinearGradient(grad2, 2, locations, idx2);
    //Vertical gradient fill.
-   gradFill2->SetStartEnd(Point(0., 0), Point(0., 1.));
+   gradFill2->SetStartEnd(Point(0., 0.), Point(0., 1.));
 
-   TH1F * hist = new TH1F("a2", "b2", 10, -2., 3.);
-   TH1F * hist2 = new TH1F("c3", "d3", 10, -3., 3.);
+   TH1F * const hist = new TH1F("a2", "b2", 10, -2., 3.);
+   TH1F * const hist2 = new TH1F("c3", "d3", 10, -3., 3.);
    hist->FillRandom("landau", 100000);
    hist2->FillRandom("gaus", 100000);
 

tutorials/gl/gradients.C

@@ -9,7 +9,6 @@
 
 
 //Includes for ACLiC:
-
 #include "TColorGradient.h"
 #include "TCanvas.h"
 #include "TError.h"
@@ -40,7 +39,6 @@ void gradients()
    
    gStyle->SetCanvasPreferGL(kTRUE);
    
-   //Create a canvas to check if we have a right back-end which supports gradients:
    TCanvas * const c = new TCanvas("cpie","Gradient colours demo", 700, 700);
    //Before we allocated any new colour or created any object:
    if (!c->UseGL()) {
@@ -49,8 +47,6 @@ void gradients()
       return;
    }
 
-   c->cd();
-
    //Linear gradient is defined by: 1) colors (to interpolate between them),
    //2) coordinates for these colors along the gradient axis [0., 1.] (must be sorted!).
    //3) Start and end points for a gradient, you specify them in some NDC rect ([0,0 - 1,1]),
@@ -69,19 +65,19 @@ void gradients()
                                  0.8, 1., 0.9, 1.  /*pale green*/};
    TLinearGradient * const gradientFill1 = new TLinearGradient(linearFill, 2, locations, rgbaData1);
    //45 degrees:
-   gradientFill1->SetStartEnd(TColorGradient::Point(0, 0), TColorGradient::Point(1, 1));
+   gradientFill1->SetStartEnd(TColorGradient::Point(0., 0.), TColorGradient::Point(1., 1.));
    //Set as a background color in the canvas:
    c->SetFillColor(linearFill);
 
    //Draw a text in the canvas (the object above the text will be
    //semi-transparent):
-   TText * t = new TText(0.05, 0.7, "Can you see the text?");
+   TText * const t = new TText(0.05, 0.7, "Can you see the text?");
    t->Draw();
    
    //We create a nested pad on top to render a TPie in,
    //this way we still have a text (below) + TPie with
    //a fancy colour on top.
-   TPad * pad = new TPad("p", "p", 0., 0., 1., 1.);
+   TPad * const pad = new TPad("p", "p", 0., 0., 1., 1.);
    
    //TPad itself is fully transparent:
    new TColor(transparentFill, 1., 1., 1., "transparent_fill_color", 0.);
@@ -112,7 +108,7 @@ void gradients()
    Int_t colors[nSlices] = {radialFill, radialFill, radialFill,
                             radialFill, radialFill};
 
-   TPie *pie = new TPie("pie", "TPie:", nSlices, values, colors);
+   TPie * const pie = new TPie("pie", "TPie:", nSlices, values, colors);
    //One slice is slightly shifted:
    pie->SetEntryRadiusOffset(2, 0.05);
    //Move labels to the center (to fit the pad's space):

tutorials/gl/parallelcoordtrans.C

@@ -12,12 +12,11 @@
 
 #include "TParallelCoordVar.h"
 #include "TParallelCoord.h"
-#include "TVirtualX.h"
 #include "TNtuple.h"
 #include "TCanvas.h"
 #include "TRandom.h"
 #include "TColor.h"
-#include "Rtypes.h"
+#include "TStyle.h"
 #include "TError.h"
 #include "TList.h"
 #include "TROOT.h"