TGInputDialog.cxx

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// @(#)root/gui:$Id$
// Author: David Gonzalez Maline  19/07/2006
 
/*************************************************************************
 * 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.             *
 *************************************************************************/
 
 
/** \class TGInputDialog
    \ingroup guiwidgets
 
Input Dialog Widget
 
An Input dialog box
 
*/
 
 
#include "TGInputDialog.h"
#include "TGButton.h"
#include "TGLabel.h"
#include "TGTextEntry.h"
 
ClassImp(TGInputDialog);
 
 
////////////////////////////////////////////////////////////////////////////////
/// Create simple input dialog.
///
/// It is important to know that the case where the constructor in
/// which all the variables are initialized to their default values is
/// only used for the TBrowser to inspect on the classes. For normal
/// use the only variable that should be free is options.
///
/// Variables prompt, defval are the content of the input dialog while
/// retstr has to be initialized to a char[256]. In case these are not
/// initialized, they will show default values while retstr will be
/// automatically allocated by the dialog. However this will make
/// impossible to retrieve the value entered by the dialog.
///
/// To see TGInputDialog in use see:
/// $ROOTSYS/tutorials/testInputDialog.cxx
 
TGInputDialog::TGInputDialog(const TGWindow *p, const TGWindow *main,
                             const char *prompt, const char *defval,
                             char *retstr, UInt_t options) :
      TGTransientFrame(p, main, 10, 10, options)
{
 
   if (!p && !main) {
      MakeZombie();
      // coverity [uninit_ctor]
      return;
   }
   SetCleanup(kDeepCleanup);
   // create prompt label and textentry widget
   fLabel = new TGLabel(this, prompt?prompt:"Introduce value:");
 
   TGTextBuffer *tbuf = new TGTextBuffer(256);  //will be deleted by TGtextEntry
   tbuf->AddText(0, defval?defval:"");
 
   fTE = new TGTextEntry(this, tbuf);
   fTE->Resize(260, fTE->GetDefaultHeight());
 
   AddFrame(fLabel, new TGLayoutHints(kLHintsTop | kLHintsLeft, 5, 5, 5, 0));
   AddFrame(fTE, new TGLayoutHints(kLHintsTop | kLHintsLeft, 5, 5, 5, 5));
 
   // create frame and layout hints for Ok and Cancel buttons
   TGHorizontalFrame *hf = new TGHorizontalFrame(this, 60, 20, kFixedWidth);
   hf->SetCleanup(kDeepCleanup);
 
   // create OK and Cancel buttons in their own frame (hf)
   UInt_t  width = 0, height = 0;
 
   fOk = new TGTextButton(hf, "&Ok", 1);
   fOk->Associate(this);
   hf->AddFrame(fOk, new TGLayoutHints(kLHintsCenterY | kLHintsExpandX, 5, 5, 0, 0));
   width  = TMath::Max(width, fOk->GetDefaultWidth());
 
   fCancel = new TGTextButton(hf, "&Cancel", 2);
   fCancel->Associate(this);
   hf->AddFrame(fCancel, new TGLayoutHints(kLHintsCenterY | kLHintsExpandX, 5, 5, 0, 0));
   height = fCancel->GetDefaultHeight();
   width  = TMath::Max(width, fCancel->GetDefaultWidth());
 
   // place button frame (hf) at the bottom
   AddFrame(hf, new TGLayoutHints(kLHintsBottom | kLHintsCenterX, 0, 0, 5, 5));
 
   // keep buttons centered and with the same width
   hf->Resize((width + 20) * 2, height);
 
   // set dialog title
   SetWindowName("Get Input");
 
   // map all widgets and calculate size of dialog
   MapSubwindows();
 
   width  = GetDefaultWidth();
   height = GetDefaultHeight();
 
   Resize(width, height);
 
   // position relative to the parent's window
   CenterOnParent();
 
   // make the message box non-resizable
   SetWMSize(width, height);
   SetWMSizeHints(width, height, width, height, 0, 0);
 
   SetMWMHints(kMWMDecorAll | kMWMDecorResizeH | kMWMDecorMaximize |
               kMWMDecorMinimize | kMWMDecorMenu, kMWMFuncAll |
               kMWMFuncResize | kMWMFuncMaximize | kMWMFuncMinimize,
               kMWMInputModeless);
 
   // popup dialog and wait till user replies
   MapWindow();
   fTE->SetFocus();
 
   if (!retstr)
      retstr = fOwnBuf = new char[256];
 
   fRetStr = retstr;
 
   gClient->WaitFor(this);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Cleanup dialog.
 
TGInputDialog::~TGInputDialog()
{
   Cleanup();
   delete [] fOwnBuf;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Handle button and text enter events
 
Bool_t TGInputDialog::ProcessMessage(Longptr_t msg, Longptr_t parm1, Longptr_t)
{
   switch (GET_MSG(msg)) {
      case kC_COMMAND:
         switch (GET_SUBMSG(msg)) {
            case kCM_BUTTON:
               switch (parm1) {
                  case 1:
                     // here copy the string from text buffer to return variable
                     // coverity[secure_coding]
                     strcpy(fRetStr, fTE->GetBuffer()->GetString()); // NOLINT
                     // if user selected an empty string, set the second
                     // char to 1,in order to distinguish between empty string
                     // selected with OK and Cancel button pressed
                     if (!strcmp(fRetStr, ""))
                        fRetStr[1] = 1;
                     delete this;
                     break;
                  case 2:
                     // hack to detect the case where the user pressed the
                     // Cancel button
                     fRetStr[0] = 0;
                     fRetStr[1] = 0;
                     delete this;
                     break;
               }
               default:
                  break;
         }
         break;
 
      case kC_TEXTENTRY:
         switch (GET_SUBMSG(msg)) {
            case kTE_ENTER:
               // here copy the string from text buffer to return variable
               // coverity[secure_coding]
               strcpy(fRetStr, fTE->GetBuffer()->GetString()); // NOLINT
               // if user selected an empty string, set the second
               // char to 1,in order to distinguish between empty string
               // selected with OK and Cancel button pressed
               if (!strcmp(fRetStr, ""))
                  fRetStr[1] = 1;
               delete this;
               break;
            default:
               break;
         }
         break;
 
      default:
         break;
   }
   return kTRUE;
}