wxWidgets/src/gtk1/combobox.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        combobox.cpp
// Purpose:
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "combobox.h"
#endif


#include "wx/combobox.h"

#if wxUSE_COMBOBOX

#include <wx/intl.h>

#include "gdk/gdk.h"
#include "gtk/gtk.h"

//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------

extern bool   g_blockEventsOnDrag;

//-----------------------------------------------------------------------------
// "select"
//-----------------------------------------------------------------------------

static void gtk_combo_clicked_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
{
    if (!combo->HasVMT()) return;
    if (g_blockEventsOnDrag) return;
  
    if (combo->m_alreadySent)
    {
        combo->m_alreadySent = FALSE;
        return;
    }

    combo->m_alreadySent = TRUE;
  
    wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, combo->GetId());
    event.SetInt( combo->GetSelection() );
    wxString tmp( combo->GetStringSelection() );
    event.SetString( WXSTRINGCAST(tmp) );
    event.SetEventObject(combo);
    combo->GetEventHandler()->ProcessEvent(event);
}

//-----------------------------------------------------------------------------
// wxComboBox
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)

BEGIN_EVENT_TABLE(wxComboBox, wxControl)
    EVT_SIZE(wxComboBox::OnSize)
END_EVENT_TABLE()

bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
                         const wxPoint& pos, const wxSize& size,
                         int n, const wxString choices[],
                         long style, const wxValidator& validator, 
			 const wxString& name )
{
    m_alreadySent = FALSE;
    m_needParent = TRUE;
    m_acceptsFocus = TRUE;
  
    PreCreation( parent, id, pos, size, style, name );
  
    SetValidator( validator );

    m_widget = gtk_combo_new();
  
    wxSize newSize = size;
    if (newSize.x == -1) newSize.x = 100;
    if (newSize.y == -1) newSize.y = 26;
    SetSize( newSize.x, newSize.y );
  
    GtkWidget *list = GTK_COMBO(m_widget)->list;
  
    for (int i = 0; i < n; i++)
    {
        GtkWidget *list_item = gtk_list_item_new_with_label( choices[i] ); 
  
        m_clientDataList.Append( (wxObject*)NULL );
        m_clientObjectList.Append( (wxObject*)NULL );
    
        gtk_container_add( GTK_CONTAINER(list), list_item );
    
        gtk_widget_realize( list_item );
        gtk_widget_realize( GTK_BIN(list_item)->child );
    
        gtk_widget_show( list_item );
    
        gtk_signal_connect( GTK_OBJECT(list_item), "select", 
        GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
    }
  
    m_parent->AddChild( this );

    (m_parent->m_insertCallback)( m_parent, this );
  
    PostCreation();

    ConnectWidget( GTK_COMBO(m_widget)->button );
  
    if (!value.IsNull()) SetValue( value );
    
    gtk_widget_realize( GTK_COMBO(m_widget)->list );
    gtk_widget_realize( GTK_COMBO(m_widget)->entry );
    gtk_widget_realize( GTK_COMBO(m_widget)->button );
  
    SetBackgroundColour( parent->GetBackgroundColour() );
    SetForegroundColour( parent->GetForegroundColour() );

    Show( TRUE );
    
    return TRUE;
}

wxComboBox::~wxComboBox()
{
    wxNode *node = m_clientDataList.First();
    while (node)
    {
        wxClientData *cd = (wxClientData*)node->Data();
        if (cd) delete cd;
        node = node->Next();
    }
    m_clientDataList.Clear();
}

void wxComboBox::AppendCommon( const wxString &item )
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *list = GTK_COMBO(m_widget)->list;
  
    GtkWidget *list_item = gtk_list_item_new_with_label( item ); 
  
    gtk_signal_connect( GTK_OBJECT(list_item), "select", 
      GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
  
    gtk_container_add( GTK_CONTAINER(list), list_item );
    
    if (m_widgetStyle) ApplyWidgetStyle();
  
    gtk_widget_show( list_item );
}

void wxComboBox::Append( const wxString &item )
{
    m_clientDataList.Append( (wxObject*) NULL );
    m_clientObjectList.Append( (wxObject*) NULL );
  
    AppendCommon( item );
}

void wxComboBox::Append( const wxString &item, void *clientData )
{
    m_clientDataList.Append( (wxObject*) clientData );
    m_clientObjectList.Append( (wxObject*)NULL );
  
    AppendCommon( item );
}

void wxComboBox::Append( const wxString &item, wxClientData *clientData )
{
    m_clientDataList.Append( (wxObject*) NULL );
    m_clientObjectList.Append( (wxObject*) clientData );
  
    AppendCommon( item );
}

void wxComboBox::SetClientData( int n, void* clientData )
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    wxNode *node = m_clientDataList.Nth( n );
    if (!node) return;
  
    node->SetData( (wxObject*) clientData );
}

void* wxComboBox::GetClientData( int n )
{
    wxCHECK_MSG( m_widget != NULL, NULL, "invalid combobox" );
  
    wxNode *node = m_clientDataList.Nth( n );
    if (!node) return NULL;
    
    return node->Data();
}

void wxComboBox::SetClientObject( int n, wxClientData* clientData )
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
    
    wxNode *node = m_clientObjectList.Nth( n );
    if (!node) return;
  
    wxClientData *cd = (wxClientData*) node->Data();
    if (cd) delete cd;
    
    node->SetData( (wxObject*) clientData );
}

wxClientData* wxComboBox::GetClientObject( int n )
{
    wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, "invalid combobox" );
  
    wxNode *node = m_clientDataList.Nth( n );
    if (!node) return (wxClientData*) NULL;
    
    return (wxClientData*) node->Data();
}

void wxComboBox::Clear()
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *list = GTK_COMBO(m_widget)->list;
    gtk_list_clear_items( GTK_LIST(list), 0, Number() );
  
    wxNode *node = m_clientObjectList.First();
    while (node)
    {
        wxClientData *cd = (wxClientData*)node->Data();
        if (cd) delete cd;
        node = node->Next();
    }
    m_clientObjectList.Clear();
    
    m_clientDataList.Clear();
}

void wxComboBox::Delete( int n )
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
  
    GList *child = g_list_nth( listbox->children, n );
  
    if (!child)
    {
        wxFAIL_MSG("wrong index");
        return;
    }
  
    GList *list = g_list_append( NULL, child->data );
    gtk_list_remove_items( listbox, list );
    g_list_free( list );
  
    wxNode *node = m_clientObjectList.Nth( n );
    if (node)
    {
        wxClientData *cd = (wxClientData*)node->Data();
        if (cd) delete cd;
        m_clientObjectList.DeleteNode( node );
    }
    
    node = m_clientDataList.Nth( n );
    if (node)
    {
        m_clientDataList.DeleteNode( node );
    }
}

int wxComboBox::FindString( const wxString &item )
{
    wxCHECK_MSG( m_widget != NULL, -1, "invalid combobox" );
  
    GtkWidget *list = GTK_COMBO(m_widget)->list;
  
    GList *child = GTK_LIST(list)->children;
    int count = 0;
    while (child)
    {
        GtkBin *bin = GTK_BIN( child->data );
        GtkLabel *label = GTK_LABEL( bin->child );
        if (item == label->label) return count;
        count++;
        child = child->next;
    }
  
    wxFAIL_MSG( "wxComboBox: string not found" );
  
    return -1;
}

int wxComboBox::GetSelection() const
{
    wxCHECK_MSG( m_widget != NULL, -1, "invalid combobox" );
  
    GtkWidget *list = GTK_COMBO(m_widget)->list;
  
    GList *selection = GTK_LIST(list)->selection;
    if (selection)
    {
        GList *child = GTK_LIST(list)->children;
        int count = 0;
        while (child)
        {
            if (child->data == selection->data) return count;
            count++;
            child = child->next;
        }
    }
  
    wxFAIL_MSG( "wxComboBox: no selection" );
  
    return -1;
}

wxString wxComboBox::GetString( int n ) const
{
    wxCHECK_MSG( m_widget != NULL, "", "invalid combobox" );
  
    GtkWidget *list = GTK_COMBO(m_widget)->list;
  
    GList *child = g_list_nth( GTK_LIST(list)->children, n );
    if (child)
    {
        GtkBin *bin = GTK_BIN( child->data );
        GtkLabel *label = GTK_LABEL( bin->child );
        return label->label;
    }
  
    wxFAIL_MSG( "wxComboBox: wrong index" );
  
    return "";
}

wxString wxComboBox::GetStringSelection() const
{
    wxCHECK_MSG( m_widget != NULL, "", "invalid combobox" );
  
    GtkWidget *list = GTK_COMBO(m_widget)->list;
  
    GList *selection = GTK_LIST(list)->selection;
    if (selection)
    {
        GtkBin *bin = GTK_BIN( selection->data );
        wxString tmp = GTK_LABEL( bin->child )->label;
        return tmp;
    }
  
    wxFAIL_MSG( "wxComboBox: no selection" );
  
    return "";
}

int wxComboBox::Number() const
{
    wxCHECK_MSG( m_widget != NULL, 0, "invalid combobox" );
  
    GtkWidget *list = GTK_COMBO(m_widget)->list;
  
    GList *child = GTK_LIST(list)->children;
    int count = 0;
    while (child) { count++; child = child->next; }
    return count;
}

void wxComboBox::SetSelection( int n )
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *list = GTK_COMBO(m_widget)->list;
    gtk_list_select_item( GTK_LIST(list), n );
}

void wxComboBox::SetStringSelection( const wxString &string )
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    int res = FindString( string );
    if (res == -1) return;
    SetSelection( res );
}

wxString wxComboBox::GetValue() const
{
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
    wxString tmp = gtk_entry_get_text( GTK_ENTRY(entry) );
    return tmp;
}

void wxComboBox::SetValue( const wxString& value )
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
    wxString tmp = "";
    if (!value.IsNull()) tmp = value;
    gtk_entry_set_text( GTK_ENTRY(entry), tmp );
}

void wxComboBox::Copy()
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
#if (GTK_MINOR_VERSION == 1)
    gtk_editable_copy_clipboard( GTK_EDITABLE(entry) );
#else
    gtk_editable_copy_clipboard( GTK_EDITABLE(entry), 0 );
#endif
}

void wxComboBox::Cut()
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
#if (GTK_MINOR_VERSION == 1)
    gtk_editable_cut_clipboard( GTK_EDITABLE(entry) );
#else
    gtk_editable_cut_clipboard( GTK_EDITABLE(entry), 0 );
#endif
}

void wxComboBox::Paste()
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
#if (GTK_MINOR_VERSION == 1)
    gtk_editable_paste_clipboard( GTK_EDITABLE(entry) );
#else
    gtk_editable_paste_clipboard( GTK_EDITABLE(entry), 0 );
#endif
}

void wxComboBox::SetInsertionPoint( long pos )
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
    int tmp = (int) pos;
    gtk_entry_set_position( GTK_ENTRY(entry), tmp );
}

void wxComboBox::SetInsertionPointEnd()
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
    int pos = GTK_ENTRY(entry)->text_length;
    SetInsertionPoint( pos-1 );
}

long wxComboBox::GetInsertionPoint() const
{
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
    return (long) GTK_EDITABLE(entry)->current_pos;
}

long wxComboBox::GetLastPosition() const
{
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
    int pos = GTK_ENTRY(entry)->text_length;
    return (long) pos-1;
}

void wxComboBox::Replace( long from, long to, const wxString& value )
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
    gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
    if (value.IsNull()) return;
    gint pos = (gint)to;
    gtk_editable_insert_text( GTK_EDITABLE(entry), value, value.Length(), &pos );
}

void wxComboBox::Remove(long from, long to)
{
    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
  
    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
    gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
}

void wxComboBox::SetSelection( long WXUNUSED(from), long WXUNUSED(to) )
{
    wxFAIL_MSG( "wxComboBox::SetSelection not implemented" );
}

void wxComboBox::SetEditable( bool WXUNUSED(editable) )
{
    wxFAIL_MSG( "wxComboBox::SetEditable not implemented" );
}

void wxComboBox::OnSize( wxSizeEvent &event )
{
    wxControl::OnSize( event );
  
    int w = 21;
    gtk_widget_set_usize( GTK_COMBO(m_widget)->entry, m_width-w-1, m_height );
  
    gtk_widget_set_uposition( GTK_COMBO(m_widget)->button, m_x+m_width-w, m_y );
    gtk_widget_set_usize( GTK_COMBO(m_widget)->button, w, m_height );
}

void wxComboBox::ApplyWidgetStyle()
{
    SetWidgetStyle();
  
    gtk_widget_set_style( GTK_COMBO(m_widget)->button, m_widgetStyle );
    gtk_widget_set_style( GTK_COMBO(m_widget)->entry, m_widgetStyle );
    gtk_widget_set_style( GTK_COMBO(m_widget)->list, m_widgetStyle );
  
    GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
    GList *child = list->children;
    while (child)
    {
        gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
  
        GtkBin *bin = GTK_BIN(child->data);
        gtk_widget_set_style( bin->child, m_widgetStyle );
        
        child = child->next;
    }
}

GtkWidget* wxComboBox::GetConnectWidget()
{
    return GTK_COMBO(m_widget)->entry;
}

bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
{
    return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
             (window == GTK_COMBO(m_widget)->button->window ) );
}

#endif

  // wxUSE_COMBOBOX