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Reference Guide
guilabels.C File Reference

Detailed Description

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++
#include <TApplication.h>
#include <TGClient.h>
#include <TGButton.h>
#include <TGLabel.h>
#include <TGResourcePool.h>
class MyMainFrame : public TGMainFrame {
TGLabel *fLbl1, *fLbl2, *fLbl3, *fLbl4;
TGTextButton *fToggle;
MyMainFrame(const TGWindow *p, UInt_t w, UInt_t h);
virtual ~MyMainFrame();
void DoExit();
void DoSwitch();
ClassDef(MyMainFrame, 0)
void MyMainFrame::DoSwitch()
if (fLbl1->IsDisabled()) {
printf("Enabled labels\n");
} else {
printf("Disabled labels\n");
void MyMainFrame::DoExit()
Printf("Slot DoExit()");
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.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));
fLbl2 = new TGLabel(this, "Own Font & ForegroundColor", fTextGC->GetGC(),
AddFrame(fLbl2, new TGLayoutHints(kLHintsCenterX, 5, 5, 3, 4));
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->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
// Initialize the layout algorithm via Resize()
// Map main frame
// Clean up main frame...
void guilabels()
// Popup the GUI...
new MyMainFrame(gClient->GetRoot(), 200, 200);
const Mask_t kGCBackground
Definition: GuiTypes.h:289
const Mask_t kGCForeground
Definition: GuiTypes.h:288
const Mask_t kGCFont
Definition: GuiTypes.h:300
@ kChildFrame
Definition: GuiTypes.h:379
@ kFixedSize
Definition: GuiTypes.h:390
Handle_t FontStruct_t
Pointer to font structure.
Definition: GuiTypes.h:39
#define h(i)
Definition: RSha256.hxx:106
unsigned int UInt_t
Definition: RtypesCore.h:46
unsigned long ULong_t
Definition: RtypesCore.h:55
const Bool_t kTRUE
Definition: RtypesCore.h:91
#define ClassDef(name, id)
Definition: Rtypes.h:325
R__EXTERN TApplication * gApplication
Definition: TApplication.h:166
#define gClient
Definition: TGClient.h:166
@ kLHintsNormal
Definition: TGLayout.h:39
@ kLHintsCenterX
Definition: TGLayout.h:32
@ kLHintsExpandX
Definition: TGLayout.h:37
void Printf(const char *fmt,...)
virtual void Terminate(Int_t status=0)
Terminate the application by call TSystem::Exit() unless application has been told to return from Run...
virtual void SetToolTipText(const char *text, Long_t delayms=400)
Set tool tip text associated with this button.
Definition: TGButton.cxx:398
Definition: TGFont.h:149
FontStruct_t GetFontStruct() const
Definition: TGFont.h:193
FontH_t GetFontHandle() const
Definition: TGFont.h:192
Definition: TGGC.h:31
GContext_t GetGC() const
Definition: TGGC.h:50
Bool_t Connect(const char *signal, const char *receiver_class, void *receiver, const char *slot)
Non-static method is used to connect from the signal of this object to the receiver slot.
Definition: TQObject.cxx:866
Graphics context structure.
Definition: GuiTypes.h:224
ULong_t fBackground
background pixel
Definition: GuiTypes.h:228
Mask_t fMask
bit mask specifying which fields are valid
Definition: GuiTypes.h:251
FontH_t fFont
default text font for text operations
Definition: GuiTypes.h:242
Ilka Antcheva 1/12/2006

Definition in file guilabels.C.