TGComboBox

class TGComboBox : public TGCompositeFrame, public TGWidget

    protected:

      virtual void Init()

    public:

                           TGComboBox(const TGWindow* p = 0, Int_t id = -1, UInt_t options = kHorizontalFrame|kSunkenFrame|kDoubleBorder, Pixel_t back = GetWhitePixel())
                           TGComboBox(const TGWindow* p, const char* text, Int_t id = -1, UInt_t options = kHorizontalFrame|kSunkenFrame|kDoubleBorder, Pixel_t back = GetWhitePixel())
                           TGComboBox(const TGComboBox&)
                   virtual ~TGComboBox()
              virtual void AddEntry(TGString* s, Int_t id)
              virtual void AddEntry(const char* s, Int_t id)
              virtual void AddEntry(TGLBEntry* lbe, TGLayoutHints* lhints)
            static TClass* Class()
              virtual void DrawBorder()
              virtual void EnableTextInput(Bool_t on)
        virtual TGLBEntry* FindEntry(const char* s) const
       virtual TGDimension GetDefaultSize() const
        virtual TGListBox* GetListBox() const
             virtual Int_t GetNumberOfEntries() const
             virtual Int_t GetSelected() const
        virtual TGLBEntry* GetSelectedEntry() const
      virtual TGTextEntry* GetTextEntry() const
            virtual Bool_t HandleButton(Event_t* event)
            virtual Bool_t HandleDoubleClick(Event_t* event)
            virtual Bool_t HandleMotion(Event_t* event)
            virtual Bool_t HandleSelection(Event_t* event)
            virtual Bool_t HandleSelectionRequest(Event_t* event)
              virtual void InsertEntry(TGString* s, Int_t id, Int_t afterID)
              virtual void InsertEntry(const char* s, Int_t id, Int_t afterID)
              virtual void InsertEntry(TGLBEntry* lbe, TGLayoutHints* lhints, Int_t afterID)
           virtual TClass* IsA() const
            virtual Bool_t IsEnabled() const
            virtual Bool_t IsTextInputEnabled() const
              virtual void NewEntry(const char* s = "Entry")
            virtual Bool_t ProcessMessage(Long_t msg, Long_t parm1, Long_t parm2)
              virtual void RemoveAll()
              virtual void RemoveEntries(Int_t from_ID, Int_t to_ID)
              virtual void RemoveEntry(Int_t id = -1)
              virtual void ReturnPressed()
              virtual void SavePrimitive(ostream& out, Option_t* option = "")
              virtual void Select(Int_t id, Bool_t emit = kTRUE)
              virtual void Selected(Int_t widgetId, Int_t id)
              virtual void Selected(Int_t id)
              virtual void Selected(const char* txt)
              virtual void SetEnabled(Bool_t on = kTRUE)
              virtual void SetTopEntry(TGLBEntry* e, TGLayoutHints* lh)
              virtual void ShowMembers(TMemberInspector& insp, char* parent)
              virtual void SortByName(Bool_t ascend = kTRUE)
              virtual void Streamer(TBuffer& b)
                      void StreamerNVirtual(TBuffer& b)

Data Members

    protected:

               TGLBEntry* fSelEntry    selected item frame
             TGTextEntry* fTextEntry   text entry
      TGScrollBarElement* fDDButton    button controlling drop down of popup
         TGComboBoxPopup* fComboFrame  popup containing a listbox
               TGListBox* fListBox     the listbox with text items
         const TGPicture* fBpic        down arrow picture used in fDDButton
           TGLayoutHints* fLhs         layout hints for selected item frame
           TGLayoutHints* fLhb         layout hints for fDDButton
           TGLayoutHints* fLhdd        layout hints for fListBox

                                                                      
 TGComboBox, TGComboBoxPopup                                          
                                                                      
 A combobox (also known as a drop down listbox) allows the selection  
 of one item out of a list of items. The selected item is visible in  
 a little window. To view the list of possible items one has to click 
 on a button on the right of the little window. This will drop down   
 a listbox. After selecting an item from the listbox the box will     
 disappear and the newly selected item will be shown in the little    
 window.                                                              
                                                                      
 The TGComboBox is user callable. The TGComboBoxPopup is a service    
 class of the combobox.                                               
                                                                      
 Selecting an item in the combobox will generate the event:           
 kC_COMMAND, kCM_COMBOBOX, combobox id, item id.                      
                                                                      

 Create a combo box widget.

 Create an editable combo box widget.

 Delete a combo box widget.

 Initiate the internal classes of a combo box.

 Draw border of combo box widget.

 Switch text input or readonly mode of combobox (not perfect yet).

 Set a new combo box value (normally update of text string in
 fSelEntry is done via fSelEntry::Update()).

 Make the selected item visible in the combo box window
 and emit signals according to the second parameter.

 Handle mouse button events in the combo box.

 Remove entry. If id == -1, the currently selected entry is removed

 Handle double click in text entry.

 Handle pointer motion in text entry.

 Handle selection in text entry.

 Handle selection request in text entry.

 Process messages generated by the listbox and forward
 messages to the combobox message handling window. Parm2 contains
 the id of the selected listbox entry.

 Emit signal.

 Set state of combo box. If kTRUE=enabled, kFALSE=disabled.

 Add new entry to combo box when return key pressed inside text entry
 ReturnPressed signal is emitted.

 Remove all entries from combo box.

 Save a combo box widget as a C++ statement(s) on output stream out.