buttonChangelabel.C File Reference

This macro gives an example for changing text button labels anytime the Start or Pause buttons are clicked. More...

Go to the source code of this file.

Detailed Description

This macro gives an example for changing text button labels anytime the Start or Pause buttons are clicked.

To run it do either:

.x buttonChangelabel.C
.x buttonChangelabel.C++

#include <TGClient.h>
#include <TGButton.h>
#include <TGFrame.h>

class MyMainFrame : public TGMainFrame {

private:
   TGCompositeFrame *fCframe;
   TGTextButton     *fStart, *fPause, *fExit;
   Bool_t            start, pause;

public:
   MyMainFrame(const TGWindow *p, UInt_t w, UInt_t h);
   virtual ~MyMainFrame();
   // slots
   void ChangeStartLabel();
   void ChangePauseLabel();

   ClassDef(MyMainFrame, 0)
};

void MyMainFrame::ChangeStartLabel()
{
  // Slot connected to the Clicked() signal.
  // It will toggle labels "Start" and "Stop".

  fStart->SetState(kButtonDown);
  if (!start) {
     fStart->SetText("&Stop");
     start = kTRUE;
  } else {
     fStart->SetText("&Start");
     start = kFALSE;
  }
  fStart->SetState(kButtonUp);
}

void MyMainFrame::ChangePauseLabel()
{
  // Slot connected to the Clicked() signal.
  // It will toggle labels "Resume" and "Pause".

  fPause->SetState(kButtonDown);
  if (!pause) {
     fPause->SetText("&Resume");
     pause = kTRUE;
  } else {
     fPause->SetText("&Pause");
     pause = kFALSE;
  }
  fPause->SetState(kButtonUp);
}

MyMainFrame::MyMainFrame(const TGWindow *p, UInt_t w, UInt_t h) :
  TGMainFrame(p, w, h)
{
   // Create a horizontal frame containing buttons
   fCframe = new TGCompositeFrame(this, 170, 20, kHorizontalFrame|kFixedWidth);

   fStart = new TGTextButton(fCframe, "&Start");
   fStart->Connect("Clicked()", "MyMainFrame", this, "ChangeStartLabel()");
   fCframe->AddFrame(fStart, new TGLayoutHints(kLHintsTop | kLHintsExpandX,
                                               3, 2, 2, 2));
   fStart->SetToolTipText("Click to toggle the button label (Start/Stop)");
   start = kFALSE;

   fPause = new TGTextButton(fCframe, "&Pause");
   fPause->Connect("Clicked()", "MyMainFrame", this, "ChangePauseLabel()");
   fPause->SetToolTipText("Click to toggle the button label (Pause/Resume)");
   fCframe->AddFrame(fPause, new TGLayoutHints(kLHintsTop | kLHintsExpandX,
                                               3, 2, 2, 2));
   pause = kFALSE;

   AddFrame(fCframe, new TGLayoutHints(kLHintsCenterX, 2, 2, 5, 1));

   fExit = new TGTextButton(this, "&Exit ","gApplication->Terminate(0)");
   AddFrame(fExit, new TGLayoutHints(kLHintsTop | kLHintsExpandX,5,5,2,2));

   SetWindowName("Change Labels");

   MapSubwindows();
   Resize(GetDefaultSize());
   MapWindow();
}


MyMainFrame::~MyMainFrame()
{
   // Clean up all widgets, frames and layouthints that were used
   fCframe->Cleanup();
   Cleanup();
}


void buttonChangelabel()
{
   // Popup the GUI...
   new MyMainFrame(gClient->GetRoot(), 350, 80);
}

Author

Ilka Antcheva 1/12/2006

Definition in file buttonChangelabel.C.