Re: [Win32] Layout and look&feel

[Bob Caryl <bob fis-cal com>]

jalqadir netscape net wrote:

> Hey folks!
>  
> OK, huff, I hit a wall people. I just can't get this program to 
> display the ComboBox within an acceptable size!
> I can manipulate the width of the widget, but getting the height to a 
> more suitable size has proven to be a real challenge.
> Below is the code for the program and if you have to look at the 
> window I can send you a 'GNP' file that will show you what I mean.
>  
> Please note that I am using the Win32 version of Gtkmm and that many 
> times I have had gone a great length to fix a problem, just to realize 
> that the problem lies within the Win32 port of the toolkit.
>  
> Thanks in advance.
> ----- h file ---
> namespace jme{
> //! \brief This class is thrown in the case of an exception
> class BoxEntryEx : public virtual jme::Exception {
> public:
>     BoxEntryEx( jme::error_t ec, const std::string& f,
>                 const std::string& m, size_t l ) {
>         setException( ec, f, m, l );
>     }
>     virtual ~BoxEntryEx()throw(){}
> };//Class
> class IOBoxBase : public Gtk::VBox{
> protected:
>     virtual void Init() throw(jme::BoxEntryEx );
>     void setTitle(const char*) throw(jme::BoxEntryEx);
>     int max_len;
>     int height;
>     int width;
>     Glib::ustring title;
>     Glib::ustring text;
>     Gtk::Label* label;
> public:
>     IOBoxBase(){Init();}
>     virtual ~IOBoxBase(){};
> }; //class
>  
>  
> class ComboBox : virtual public jme::IOBoxBase{
> private:
> protected:
>     virtual void Init() throw(jme::BoxEntryEx );
>     Gtk::ComboBoxEntryText* combo_box;
> public:
>     ComboBox(){Init();}
>     ComboBox(const gchar*,              //Title
>              gint)                      //Vertical padding
>              throw(jme::BoxEntryEx );   //Exception
>     virtual ~ComboBox(){}
>     Gtk::ComboBoxEntryText* getHandle() {return combo_box;}
> }; //class
> }  // namespace
>  
> --- cpp file ---
> void jme::IOBoxBase::Init()
> throw(jme::BoxEntryEx ){
>     try{
>         label = Gtk::manage(new Gtk::Label());
>     }catch(...){
>         jme::BoxEntryEx e( mem_alloc, FILE, METHOD, LINE );
>         e.record("error_log.txt");
>         throw e;
>     }
>     text = "unknown";
>     height = 20;
>     width  = 20;
>     label->set_label(text);
>     label->set_alignment(Gtk::ALIGN_LEFT, Gtk::ALIGN_BOTTOM);
> }
> void jme::IOBoxBase::setTitle(const char* c)
> throw(jme::BoxEntryEx ){
>     title.assign(c);
>     if(title.empty()){
>         title.clear();
>         jme::BoxEntryEx e( str_empty, FILE, METHOD, LINE );
>         throw e;
>     }
>     label->set_label(title);
> }
> void jme::TextEntry::Init()
>     throw(jme::BoxEntryEx ){
>     try{
>         entry = Gtk::manage(new Gtk::Entry());
>     }catch(...){
>         jme::BoxEntryEx e( mem_alloc, FILE, METHOD, LINE );
>         e.record("error_log.txt");
>         throw e;
>     }
>     // this->set_spacing(0);
>     // Display the box with a frame
>     entry->set_has_frame( true );
>     entry->set_visibility( true );
>     // This value is overridden by the user
>     entry->set_max_length(30);
>
>     // The size of the widget
>     this->ensure_style();
>     
> }
> /////////////////////// ComboBox ///////////////////////////
> void jme::ComboBox::Init()
> throw(jme::BoxEntryEx ){
>     try{
>         combo_box = Gtk::manage(new Gtk::ComboBoxEntryText());
>     }catch(...){
>         jme::BoxEntryEx e( mem_alloc, FILE, METHOD, LINE );
>         e.record("error_log.txt");
>         throw e;
>     }
>   this->add(*label);
>   this->add(*combo_box);
> }
> jme::ComboBox::ComboBox(const gchar* title, gint pad)
> throw(jme::BoxEntryEx ){
>    Init();
>    setTitle(title);
> // === <> ===
> //   this->set_size_request (10,    //width_pixels
> //                           10);  //height_pixels);
>    combo_box->set_size_request(10,1); //<< this does not work either
> }
>  
> * You cannot exercise your power to a point of humiliation.
> - Jean Chretien
>
> * It's amazing how the small seeds of distrust and misunderstanding
> can yield a crop of hate and death...
>
> * If that document has fine printing anywhere, just chuck it in the 
> garbage
> - Jorge Escalante
> Ma'assalama! Adiós! bye!
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>  

Your problem comes in "void jme::ComboBox::Init()" where you are using 
Gtk::Container::add to insert your label and combobox into "class 
IOBoxBase".  Try using "Gtk::Box::pack_start" instead.  This method 
gives you much more control over the combobox widget's display behavior 
at run time.  See 
http://www.gtkmm.org/docs/gtkmm-2.4/docs/reference/html/classGtk_1_1Box.html#e1a2ca6c5de8ad4442ed93c2c20eec87 
for more information.

Hope this helps.

Bob Caryl

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email;internet:bob fis-cal com
title:Senior Software Design Engineer
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