guilabels.C

Go to the documentation of this file.

/// \file
/// \ingroup tutorial_gui
/// This macro gives an example of how to create different kind of labels and the possibility to enable/disable them.
/// To run it do either:
/// ~~~
/// .x guilabels.C
/// .x guilabels.C++
/// ~~~
///
/// \macro_code
///
/// \author Ilka Antcheva   1/12/2006
 
#include <TApplication.h>
#include <TGClient.h>
#include <TGButton.h>
#include <TGLabel.h>
#include <TGResourcePool.h>
 
class MyMainFrame : public TGMainFrame {
 
private:
   TGLabel *fLbl1, *fLbl2, *fLbl3, *fLbl4;
   TGTextButton *fToggle;
 
public:
   MyMainFrame(const TGWindow *p, UInt_t w, UInt_t h);
   ~MyMainFrame() override;
   void DoExit();
   void DoSwitch();
 
   ClassDefOverride(MyMainFrame, 0)
};
 
void MyMainFrame::DoSwitch()
{
   if (fLbl1->IsDisabled()) {
      printf("Enabled labels\n");
      fLbl1->Enable();
      fLbl2->Enable();
      fLbl3->Enable();
      fLbl4->Enable();
   } else {
      printf("Disabled labels\n");
      fLbl1->Disable();
      fLbl2->Disable();
      fLbl3->Disable();
      fLbl4->Disable();
   }
}
 
void MyMainFrame::DoExit()
{
   Printf("Slot DoExit()");
   gApplication->Terminate(0);
}
 
MyMainFrame::MyMainFrame(const TGWindow *p, UInt_t w, UInt_t h) : TGMainFrame(p, w, h)
{
 
   // label + horizontal line
   TGGC *fTextGC;
   const TGFont *font = gClient->GetFont("-*-times-bold-r-*-*-18-*-*-*-*-*-*-*");
   if (!font)
      font = gClient->GetResourcePool()->GetDefaultFont();
   FontStruct_t labelfont = font->GetFontStruct();
   GCValues_t gval;
   gval.fMask = kGCBackground | kGCFont | kGCForeground;
   gval.fFont = font->GetFontHandle();
   gClient->GetColorByName("yellow", gval.fBackground);
   fTextGC = gClient->GetGC(&gval, kTRUE);
 
   ULong_t bcolor, ycolor;
   gClient->GetColorByName("yellow", ycolor);
   gClient->GetColorByName("blue", bcolor);
 
   // Create a main frame
   fLbl1 = new TGLabel(this, "OwnFont & Bck/ForgrColor", fTextGC->GetGC(), labelfont, kChildFrame, bcolor);
   AddFrame(fLbl1, new TGLayoutHints(kLHintsNormal, 5, 5, 3, 4));
   fLbl1->SetTextColor(ycolor);
 
   fLbl2 = new TGLabel(this, "Own Font & ForegroundColor", fTextGC->GetGC(), labelfont);
   AddFrame(fLbl2, new TGLayoutHints(kLHintsCenterX, 5, 5, 3, 4));
   fLbl2->SetTextColor(ycolor);
 
   fLbl3 = new TGLabel(this, "Normal Label");
   AddFrame(fLbl3, new TGLayoutHints(kLHintsCenterX, 5, 5, 3, 4));
 
   fLbl4 = new TGLabel(this, "Multi-line label, resized\nto 300x80 pixels", fTextGC->GetGC(), labelfont, kChildFrame,
                       bcolor);
   AddFrame(fLbl4, new TGLayoutHints(kLHintsCenterX, 5, 5, 3, 4));
   fLbl4->SetTextColor(ycolor);
   fLbl4->ChangeOptions(fLbl4->GetOptions() | kFixedSize);
   fLbl4->Resize(350, 80);
 
   // Create a horizontal frame containing two buttons
   TGTextButton *toggle = new TGTextButton(this, "&Toggle Labels");
   toggle->Connect("Clicked()", "MyMainFrame", this, "DoSwitch()");
   toggle->SetToolTipText("Click on the button to toggle label's state (enable/disable)");
   AddFrame(toggle, new TGLayoutHints(kLHintsExpandX, 5, 5, 3, 4));
   TGTextButton *exit = new TGTextButton(this, "&Exit ");
   exit->Connect("Pressed()", "MyMainFrame", this, "DoExit()");
   AddFrame(exit, new TGLayoutHints(kLHintsExpandX, 5, 5, 3, 4));
 
   // Set a name to the main frame
   SetWindowName("Labels");
   MapSubwindows();
 
   // Initialize the layout algorithm via Resize()
   Resize(GetDefaultSize());
 
   // Map main frame
   MapWindow();
}
 
MyMainFrame::~MyMainFrame()
{
   // Clean up main frame...
   Cleanup();
}
 
void guilabels()
{
   // Popup the GUI...
   new MyMainFrame(gClient->GetRoot(), 200, 200);
}