TGroupButton.cxx

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// @(#)root/gpad:$Id: faa839c41a9482cbcb403b991070b15d606c9137 $
// Author: Rene Brun   01/07/96
 
/*************************************************************************
 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#include "TROOT.h"
#include "TBox.h"
#include "TGroupButton.h"
#include "TDialogCanvas.h"
#include "TCanvas.h"
#include "TText.h"
#include "TInterpreter.h"
#include "strlcpy.h"
#include "snprintf.h"
 
#include <cstring>
#include <iostream>
 
ClassImp(TGroupButton);
 
 
/** \class TGroupButton
\ingroup gpad
 
A specialized TButton used in a group of Buttons.
When a button from a group of TGroupButtons is selected, all other buttons
from the group with the same name are disabled.
 
For examples of use of TGroupButton objects, see:
AttFillCanvas, TAttLineCanvas, TAttTextCanvas and TAttMarkerCanvas.
 
A TGroupButton object is a specialized TPad including possible list
of primitives used to build selections and options menus in a canvas.
*/
 
 
////////////////////////////////////////////////////////////////////////////////
/// GroupButton default constructor.
 
TGroupButton::TGroupButton(): TButton()
{
   SetFraming();
}
 
////////////////////////////////////////////////////////////////////////////////
/// GroupButton normal constructor.
 
TGroupButton::TGroupButton(const char *groupname, const char *title, const char *method, Double_t x1, Double_t y1,Double_t x2, Double_t  y2)
           :TButton(title,method,x1,y1,x2,y2)
{
   SetName((char*)groupname);
   SetFraming();
}
 
////////////////////////////////////////////////////////////////////////////////
/// GroupButton default destructor.
 
TGroupButton::~TGroupButton()
{
}
 
////////////////////////////////////////////////////////////////////////////////
/// Display Color Table in an attribute canvas.
 
void TGroupButton::DisplayColorTable(const char *action, Double_t x0, Double_t y0, Double_t wc, Double_t hc)
{
   TGroupButton *colorpad;
   Int_t i, j;
   Int_t color;
   Double_t xlow, ylow, hs, ws;
 
   // draw color table buttons
   hs = hc/5;
   ws = wc/10;
   char command[32];
   for (i=0;i<10;i++) {
      xlow = x0 + ws*i;
      for (j=0;j<5;j++) {
         ylow = y0 + hs*j;
         color = 10*j + i + 1;
         snprintf(command,32,"%s(%d)",action,10*j+i+1);
         colorpad = new TGroupButton("Color","",command,xlow, ylow, xlow+0.9*ws, ylow+0.9*hs);
         colorpad->SetFillColor(color);
         colorpad->SetBorderSize(1);
         if (i == 0 && j == 0) colorpad->SetBorderMode(-1);
         colorpad->Draw();
      }
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Execute action of this button.
///
/// If an object has been selected before executing the APPLY button
/// in the control canvas, The member function and its parameters
/// for this object is executed via the interpreter.
 
void TGroupButton::ExecuteAction()
{
   char line[128];
   strlcpy(line,GetMethod(),128);
   char *method = line;
   if(!line[0]) return;
   char *params = strchr(method,'(');
   if (params) {
      *params = 0;
      params++;
      char *end = strrchr(params,')');
      if (end) *end = 0;
   }
   TDialogCanvas *canvas = (TDialogCanvas*)GetMother();
   TObject *obj = canvas->GetRefObject();
   if (!obj) return;
   if (strcmp(method,"PIXELS")) {
      obj->Execute(method, params);
   } else {
      TText *text = (TText*)GetListOfPrimitives()->First();
      Int_t npixels = Int_t((YtoPixel(0) - YtoPixel(1))*text->GetTextSize());
      Double_t dy = 0;
      auto pad = gROOT->GetSelectedPad();
      if (!params) return;
      Int_t nmax = (Int_t)(params - method);
      if (obj->InheritsFrom("TPaveLabel")) {
         TBox *pl = (TBox*)obj;
         if (pad)
            dy = (pad->AbsPixeltoY(0) - pad->AbsPixeltoY(npixels))/(pl->GetY2() - pl->GetY1());
         snprintf(params, nmax, "%f", dy);
         obj->Execute("SetTextSize",params);
      } else if (obj->InheritsFrom("TPave")) {
         if (pad)
            dy = (pad->AbsPixeltoY(0) - pad->AbsPixeltoY(npixels))/(pad->GetY2() - pad->GetY1());
         snprintf(params, nmax, "%f", dy);
         obj->Execute("SetTextSize",params);
      } else {
         snprintf(params, nmax, "%d", npixels);
         obj->Execute("SetTextSizePixels", params);
      }
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Execute action corresponding to one event.
///
/// This member function is called when a Button object is clicked.
 
void TGroupButton::ExecuteEvent(Int_t event, Int_t px, Int_t py)
{
   if (fMother->IsEditable()) {
      TPad::ExecuteEvent(event,px,py);
      return;
   }
 
   TCanvas *c = gPad->GetCanvas();
   if (!c) return;
   TIter next(c->GetListOfPrimitives());
   TObject *obj;
   TGroupButton *button;
   TPad *pad;
   TDialogCanvas *canvas;
 
   switch (event) {
 
   case kButton1Down:
 
   case kMouseMotion:
 
      break;
 
   case kButton1Motion:
 
      break;
 
   case kButton1Up:
      //Clicked on APPLY button?
      if (!strcasecmp(GetName(),"APPLY")) {
         canvas = (TDialogCanvas*)GetMother();
         if (!strcasecmp(GetTitle(),"CLOSE")) {
            canvas->Close();
            return;
         }
         pad = canvas->GetRefPad();
         if (pad) pad->GetCanvas()->FeedbackMode(kFALSE);
         canvas->Apply(GetTitle());   //just in case the apply button executes some code
         if (pad) {
            pad->Modified(kTRUE);
            pad->Update();
         }
         break;
      }
      //Unset other buttons with same name
      while ((obj = next())) {
         if (obj == this) continue;
         if (obj->InheritsFrom(TGroupButton::Class())) {
            button = (TGroupButton*)obj;
            if (!strcmp(button->GetName(),GetName())) {
               if (button->GetBorderMode() < 0) {
                  button->SetBorderMode(1);
                  button->Modified();
               }
            }
         }
      }
      //Set button on
      SetBorderMode(-1);
      Modified();
      c->Modified();
      gPad->Update();
      break;
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Save primitive as a C++ statement(s) on output stream out
 
void TGroupButton::SavePrimitive(std::ostream &out, Option_t * /*= ""*/)
{
   TVirtualPad::TContext ctxt(kTRUE);
 
   SavePrimitiveConstructor(out, Class(), "grbutton",
                            TString::Format("\"%s\", \"%s\", \"%s\", %g, %g, %g, %g",
                                            TString(GetName()).ReplaceSpecialCppChars().Data(),
                                            TString(GetTitle()).ReplaceSpecialCppChars().Data(),
                                            TString(GetMethod()).ReplaceSpecialCppChars().Data(), fXlowNDC, fYlowNDC,
                                            fXlowNDC + fWNDC, fYlowNDC + fHNDC));
 
   SaveFillAttributes(out, "grbutton", 0, 1001);
   SaveLineAttributes(out, "grbutton", 1, 1, 1);
   SaveTextAttributes(out, "grbutton", 22, 0, 1, 62, .75);
 
   if (GetBorderSize() != 2)
      out << "   grbutton->SetBorderSize(" << GetBorderSize() << ");\n";
 
   if (GetBorderMode() != 1)
      out << "   grbutton->SetBorderMode(" << GetBorderMode() << ");\n";
 
   out << "   grbutton->Draw();\n";
 
   TIter next(GetListOfPrimitives());
   next(); // do not save first primitive
 
   Int_t nprim = 0;
   while (auto obj = next()) {
      if (nprim++ == 0)
         out << "   grbutton->cd();\n";
      obj->SavePrimitive(out, next.GetOption());
   }
 
   if (ctxt.GetSaved() && (nprim > 0))
      out << "   " << ctxt.GetSaved()->GetName() << "->cd();\n";
}