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listBox.C File Reference

Detailed Description

This macro gives an example of how to create a list box and how to set and use its multiple selection feature.

To run it do either:

.x listBox.C
.x listBox.C++
#include <TApplication.h>
#include <TGClient.h>
#include <TGButton.h>
#include <TGListBox.h>
#include <TList.h>
class MyMainFrame : public TGMainFrame {
TGListBox *fListBox;
TGCheckButton *fCheckMulti;
TList *fSelected;
MyMainFrame(const TGWindow *p, UInt_t w, UInt_t h);
virtual ~MyMainFrame();
void DoExit();
void DoSelect();
void HandleButtons();
void PrintSelected();
ClassDef(MyMainFrame, 0)
void MyMainFrame::DoSelect()
Printf("Slot DoSelect()");
void MyMainFrame::DoExit()
Printf("Slot DoExit()");
MyMainFrame::MyMainFrame(const TGWindow *p, UInt_t w, UInt_t h) :
TGMainFrame(p, w, h)
// Create main frame
fListBox = new TGListBox(this, 89);
fSelected = new TList;
char tmp[20];
for (int i = 0; i < 20; ++i) {
sprintf(tmp, "Entry %i", i+1);
fListBox->AddEntry(tmp, i+1);
AddFrame(fListBox, new TGLayoutHints(kLHintsTop | kLHintsLeft |
5, 5, 5, 5));
fCheckMulti = new TGCheckButton(this, "&Mutliple selection", 10);
AddFrame(fCheckMulti, new TGLayoutHints(kLHintsTop | kLHintsLeft,
5, 5, 5, 5));
fCheckMulti->Connect("Clicked()", "MyMainFrame", this, "HandleButtons()");
// Create a horizontal frame containing button(s)
TGHorizontalFrame *hframe = new TGHorizontalFrame(this, 150, 20, kFixedWidth);
TGTextButton *show = new TGTextButton(hframe, "&Show");
show->SetToolTipText("Click here to print the selection you made");
show->Connect("Pressed()", "MyMainFrame", this, "PrintSelected()");
hframe->AddFrame(show, new TGLayoutHints(kLHintsExpandX, 5, 5, 3, 4));
TGTextButton *exit = new TGTextButton(hframe, "&Exit ");
exit->Connect("Pressed()", "MyMainFrame", this, "DoExit()");
hframe->AddFrame(exit, new TGLayoutHints(kLHintsExpandX, 5, 5, 3, 4));
AddFrame(hframe, new TGLayoutHints(kLHintsExpandX, 2, 2, 5, 1));
// Set a name to the main frame
SetWindowName("List Box");
// Initialize the layout algorithm via Resize()
// Map main frame
// Clean up main frame...
if (fSelected) {
delete fSelected;
void MyMainFrame::HandleButtons()
// Handle check button.
id = btn->WidgetId();
printf("HandleButton: id = %d\n", id);
if (id == 10)
void MyMainFrame::PrintSelected()
// Writes selected entries in TList if multiselection.
if (fListBox->GetMultipleSelections()) {
Printf("Selected entries are:\n");
} else {
Printf("Selected entries is: %d\n", fListBox->GetSelected());
void listBox()
// Popup the GUI...
new MyMainFrame(gClient->GetRoot(), 200, 200);
@ kFixedWidth
Definition GuiTypes.h:387
#define h(i)
Definition RSha256.hxx:106
int Int_t
Definition RtypesCore.h:45
unsigned int UInt_t
Definition RtypesCore.h:46
#define ClassDef(name, id)
Definition Rtypes.h:325
R__EXTERN TApplication * gApplication
#define gClient
Definition TGClient.h:166
@ kLHintsExpandY
Definition TGLayout.h:38
@ kLHintsLeft
Definition TGLayout.h:31
@ kLHintsTop
Definition TGLayout.h:34
@ kLHintsExpandX
Definition TGLayout.h:37
XFontStruct * id
Definition TGX11.cxx:109
R__EXTERN void * gTQSender
Definition TQObject.h:46
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
virtual void AddFrame(TGFrame *f, TGLayoutHints *l=0)
Add frame to the composite frame using the specified layout hints.
Definition TGFrame.cxx:1102
Int_t WidgetId() const
Definition TGWidget.h:78
A doubly linked list.
Definition TList.h:44
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
Ilka Antcheva 1/12/2006

Definition in file listBox.C.