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bac957422a5fb858173f7c0643dd1c0f5ae2d506
wxWidgets/src/gtk1/listbox.cpp
Robert Roebling bac957422a Changed/Fixed way in which wxListBox blocks events 
after changing its state programatically.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12463 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2001-11-17 22:32:15 +00:00

1056 lines
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/////////////////////////////////////////////////////////////////////////////
// Name: listbox.cpp
// Purpose:
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#pragma implementation "listbox.h"
#endif
#include "wx/listbox.h"
#if wxUSE_LISTBOX
#include "wx/dynarray.h"
#include "wx/utils.h"
#include "wx/intl.h"
#include "wx/checklst.h"
#include "wx/settings.h"
#if wxUSE_TOOLTIPS
#include "wx/tooltip.h"
#endif
#include <gdk/gdk.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
//-----------------------------------------------------------------------------
// idle system
//-----------------------------------------------------------------------------
extern void wxapp_install_idle_handler();
extern bool g_isIdle;
//-------------------------------------------------------------------------
// conditional compilation
//-------------------------------------------------------------------------
#if (GTK_MINOR_VERSION > 0)
#define NEW_GTK_SCROLL_CODE
#endif
//-----------------------------------------------------------------------------
// private functions
//-----------------------------------------------------------------------------
#if wxUSE_CHECKLISTBOX
// checklistboxes have "[±] " prepended to their lables, this macro removes it
// (NB: 4 below is the length of wxCHECKLBOX_STRING above)
//
// the argument to it is a "const char *" pointer
#define GET_REAL_LABEL(label) ((m_hasCheckBoxes)?(label)+4 : (label))
#else // !wxUSE_CHECKLISTBOX
#define GET_REAL_LABEL(label) (label)
#endif // wxUSE_CHECKLISTBOX
//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------
extern bool g_blockEventsOnDrag;
extern bool g_blockEventsOnScroll;
extern wxCursor g_globalCursor;
static bool g_hasDoubleClicked = FALSE;
//-----------------------------------------------------------------------------
// idle callback for SetFirstItem
//-----------------------------------------------------------------------------
struct wxlistbox_idle_struct
{
wxListBox *m_listbox;
int m_item;
gint m_tag;
};
static gint wxlistbox_idle_callback( gpointer gdata )
{
wxlistbox_idle_struct* data = (wxlistbox_idle_struct*) gdata;
gdk_threads_enter();
gtk_idle_remove( data->m_tag );
data->m_listbox->SetFirstItem( data->m_item );
delete data;
gdk_threads_leave();
return TRUE;
}
//-----------------------------------------------------------------------------
// "button_release_event"
//-----------------------------------------------------------------------------
/* we would normally emit a wxEVT_COMMAND_LISTBOX_DOUBLECLICKED event once
a GDK_2BUTTON_PRESS occurs, but this has the particular problem of the
listbox keeping the focus until it receives a GDK_BUTTON_RELEASE event.
this can lead to race conditions so that we emit the dclick event
after the GDK_BUTTON_RELEASE event after the GDK_2BUTTON_PRESS event */
static gint
gtk_listbox_button_release_callback( GtkWidget * WXUNUSED(widget),
GdkEventButton * WXUNUSED(gdk_event),
wxListBox *listbox )
{
if (g_isIdle) wxapp_install_idle_handler();
if (g_blockEventsOnDrag) return FALSE;
if (g_blockEventsOnScroll) return FALSE;
if (!listbox->m_hasVMT) return FALSE;
if (!g_hasDoubleClicked) return FALSE;
wxCommandEvent event( wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, listbox->GetId() );
event.SetEventObject( listbox );
wxArrayInt aSelections;
int n, count = listbox->GetSelections(aSelections);
if ( count > 0 )
{
n = aSelections[0];
if ( listbox->HasClientObjectData() )
event.SetClientObject( listbox->GetClientObject(n) );
else if ( listbox->HasClientUntypedData() )
event.SetClientData( listbox->GetClientData(n) );
event.SetString( listbox->GetString(n) );
}
else
{
n = -1;
}
event.m_commandInt = n;
listbox->GetEventHandler()->ProcessEvent( event );
return FALSE;
}
//-----------------------------------------------------------------------------
// "button_press_event"
//-----------------------------------------------------------------------------
static gint
gtk_listbox_button_press_callback( GtkWidget *widget,
GdkEventButton *gdk_event,
wxListBox *listbox )
{
if (g_isIdle) wxapp_install_idle_handler();
if (g_blockEventsOnDrag) return FALSE;
if (g_blockEventsOnScroll) return FALSE;
if (!listbox->m_hasVMT) return FALSE;
int sel = listbox->GtkGetIndex( widget );
#if wxUSE_CHECKLISTBOX
if ((listbox->m_hasCheckBoxes) && (gdk_event->x < 15) && (gdk_event->type != GDK_2BUTTON_PRESS))
{
wxCheckListBox *clb = (wxCheckListBox *)listbox;
clb->Check( sel, !clb->IsChecked(sel) );
wxCommandEvent event( wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, listbox->GetId() );
event.SetEventObject( listbox );
event.SetInt( sel );
listbox->GetEventHandler()->ProcessEvent( event );
}
#endif // wxUSE_CHECKLISTBOX
/* emit wxEVT_COMMAND_LISTBOX_DOUBLECLICKED later */
g_hasDoubleClicked = (gdk_event->type == GDK_2BUTTON_PRESS);
return FALSE;
}
//-----------------------------------------------------------------------------
// "key_press_event"
//-----------------------------------------------------------------------------
static gint
gtk_listbox_key_press_callback( GtkWidget *widget, GdkEventKey *gdk_event, wxListBox *listbox )
{
if (g_isIdle)
wxapp_install_idle_handler();
if (g_blockEventsOnDrag)
return FALSE;
bool ret = FALSE;
if ((gdk_event->keyval == GDK_Tab) || (gdk_event->keyval == GDK_ISO_Left_Tab))
{
wxNavigationKeyEvent new_event;
/* GDK reports GDK_ISO_Left_Tab for SHIFT-TAB */
new_event.SetDirection( (gdk_event->keyval == GDK_Tab) );
/* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
new_event.SetWindowChange( (gdk_event->state & GDK_CONTROL_MASK) );
new_event.SetCurrentFocus( listbox );
ret = listbox->GetEventHandler()->ProcessEvent( new_event );
}
if ((gdk_event->keyval == GDK_Return) && (!ret))
{
// eat return in all modes
ret = TRUE;
}
#if wxUSE_CHECKLISTBOX
if ((gdk_event->keyval == ' ') && (listbox->m_hasCheckBoxes) && (!ret))
{
int sel = listbox->GtkGetIndex( widget );
wxCheckListBox *clb = (wxCheckListBox *)listbox;
clb->Check( sel, !clb->IsChecked(sel) );
wxCommandEvent new_event( wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, listbox->GetId() );
new_event.SetEventObject( listbox );
new_event.SetInt( sel );
ret = listbox->GetEventHandler()->ProcessEvent( new_event );
}
#endif // wxUSE_CHECKLISTBOX
if (ret)
{
gtk_signal_emit_stop_by_name( GTK_OBJECT(widget), "key_press_event" );
return TRUE;
}
return FALSE;
}
//-----------------------------------------------------------------------------
// "select" and "deselect"
//-----------------------------------------------------------------------------
static void gtk_listitem_select_cb( GtkWidget *widget, wxListBox *listbox, bool is_selection );
static void gtk_listitem_select_callback( GtkWidget *widget, wxListBox *listbox )
{
gtk_listitem_select_cb( widget, listbox, TRUE );
}
static void gtk_listitem_deselect_callback( GtkWidget *widget, wxListBox *listbox )
{
gtk_listitem_select_cb( widget, listbox, FALSE );
}
static void gtk_listitem_select_cb( GtkWidget *widget, wxListBox *listbox, bool is_selection )
{
if (g_isIdle) wxapp_install_idle_handler();
if (!listbox->m_hasVMT) return;
if (g_blockEventsOnDrag) return;
if (listbox->m_blockEvent) return;
wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, listbox->GetId() );
event.SetEventObject( listbox );
// MSW doesn't do that either
// event.SetExtraLong( (long) is_selection );
if ((listbox->GetWindowStyleFlag() & wxLB_SINGLE) != 0)
{
int sel = listbox->GtkGetIndex( widget );
if (listbox->m_prevSelection != sel)
gtk_list_unselect_item( listbox->m_list, listbox->m_prevSelection );
listbox->m_prevSelection = sel;
}
wxArrayInt aSelections;
int n, count = listbox->GetSelections(aSelections);
if ( count > 0 )
{
n = aSelections[0];
if ( listbox->HasClientObjectData() )
event.SetClientObject( listbox->GetClientObject(n) );
else if ( listbox->HasClientUntypedData() )
event.SetClientData( listbox->GetClientData(n) );
event.SetString( listbox->GetString(n) );
}
else
{
n = -1;
}
event.m_commandInt = n;
// No longer required with new code in wxLB_SINGLE
// listbox->GetEventHandler()->AddPendingEvent( event );
listbox->GetEventHandler()->ProcessEvent( event );
}
//-----------------------------------------------------------------------------
// wxListBox
//-----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(wxListBox,wxControl)
// ----------------------------------------------------------------------------
// construction
// ----------------------------------------------------------------------------
wxListBox::wxListBox()
{
m_list = (GtkList *) NULL;
#if wxUSE_CHECKLISTBOX
m_hasCheckBoxes = FALSE;
#endif // wxUSE_CHECKLISTBOX
}
bool wxListBox::Create( wxWindow *parent, wxWindowID id,
const wxPoint &pos, const wxSize &size,
int n, const wxString choices[],
long style, const wxValidator& validator,
const wxString &name )
{
m_needParent = TRUE;
m_acceptsFocus = TRUE;
m_isListBox = TRUE;
m_prevSelection = 0; // or -1 ??
m_blockEvent = FALSE;
if (!PreCreation( parent, pos, size ) ||
!CreateBase( parent, id, pos, size, style, validator, name ))
{
wxFAIL_MSG( wxT("wxListBox creation failed") );
return FALSE;
}
m_widget = gtk_scrolled_window_new( (GtkAdjustment*) NULL, (GtkAdjustment*) NULL );
if (style & wxLB_ALWAYS_SB)
{
gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(m_widget),
GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS );
}
else
{
gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(m_widget),
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
}
m_list = GTK_LIST( gtk_list_new() );
GtkSelectionMode mode;
if (style & wxLB_MULTIPLE)
{
mode = GTK_SELECTION_MULTIPLE;
}
else if (style & wxLB_EXTENDED)
{
mode = GTK_SELECTION_EXTENDED;
}
else
{
// if style was 0 set single mode
m_windowStyle |= wxLB_SINGLE;
mode = GTK_SELECTION_MULTIPLE;
}
gtk_list_set_selection_mode( GTK_LIST(m_list), mode );
#ifdef NEW_GTK_SCROLL_CODE
gtk_scrolled_window_add_with_viewport( GTK_SCROLLED_WINDOW(m_widget), GTK_WIDGET(m_list) );
#else
gtk_container_add( GTK_CONTAINER(m_widget), GTK_WIDGET(m_list) );
#endif
/* make list scroll when moving the focus down using cursor keys */
gtk_container_set_focus_vadjustment(
GTK_CONTAINER(m_list),
gtk_scrolled_window_get_vadjustment(
GTK_SCROLLED_WINDOW(m_widget)));
gtk_widget_show( GTK_WIDGET(m_list) );
SetBestSize( size );
if ( style & wxLB_SORT )
{
// this will change DoAppend() behaviour
m_strings = new wxSortedArrayString;
}
else
{
m_strings = (wxSortedArrayString *)NULL;
}
for (int i = 0; i < n; i++)
{
// add one by one
DoAppend(choices[i]);
}
m_parent->DoAddChild( this );
PostCreation();
SetBackgroundColour( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_LISTBOX ) );
SetForegroundColour( parent->GetForegroundColour() );
SetFont( parent->GetFont() );
Show( TRUE );
return TRUE;
}
wxListBox::~wxListBox()
{
m_hasVMT = FALSE;
Clear();
if (m_strings)
delete m_strings;
}
void wxListBox::DoInsertItems(const wxArrayString& items, int pos)
{
wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
// VZ: notice that InsertItems knows nothing about sorting, so calling it
// from outside (and not from our own Append) is likely to break
// everything
// code elsewhere supposes we have as many items in m_clientList as items
// in the listbox
wxASSERT_MSG( m_clientList.GetCount() == (size_t)GetCount(),
wxT("bug in client data management") );
GList *children = m_list->children;
int length = g_list_length(children);
wxCHECK_RET( pos <= length, wxT("invalid index in wxListBox::InsertItems") );
size_t nItems = items.GetCount();
int index;
if (m_strings)
{
for (size_t n = 0; n < nItems; n++)
{
index = m_strings->Add( items[n] );
if (index != GetCount())
{
GtkAddItem( items[n], index );
wxNode *node = m_clientList.Nth( index );
m_clientList.Insert( node, (wxObject*) NULL );
}
else
{
GtkAddItem( items[n] );
m_clientList.Append( (wxObject*) NULL );
}
}
}
else
{
if (pos == length)
{
for ( size_t n = 0; n < nItems; n++ )
{
GtkAddItem( items[n] );
m_clientList.Append((wxObject *)NULL);
}
}
else
{
wxNode *node = m_clientList.Nth( pos );
for ( size_t n = 0; n < nItems; n++ )
{
GtkAddItem( items[n], pos+n );
m_clientList.Insert( node, (wxObject *)NULL );
}
}
}
wxASSERT_MSG( m_clientList.GetCount() == (size_t)GetCount(),
wxT("bug in client data management") );
}
int wxListBox::DoAppend( const wxString& item )
{
if (m_strings)
{
// need to determine the index
int index = m_strings->Add( item );
// only if not at the end anyway
if (index != GetCount())
{
GtkAddItem( item, index );
wxNode *node = m_clientList.Nth( index );
m_clientList.Insert( node, (wxObject *)NULL );
return index;
}
}
GtkAddItem(item);
m_clientList.Append((wxObject *)NULL);
return GetCount() - 1;
}
void wxListBox::GtkAddItem( const wxString &item, int pos )
{
wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
GtkWidget *list_item;
wxString label(item);
#if wxUSE_CHECKLISTBOX
if (m_hasCheckBoxes)
{
label.Prepend(wxCHECKLBOX_STRING);
}
#endif // wxUSE_CHECKLISTBOX
list_item = gtk_list_item_new_with_label( label.mbc_str() );
GList *gitem_list = g_list_alloc ();
gitem_list->data = list_item;
if (pos == -1)
gtk_list_append_items( GTK_LIST (m_list), gitem_list );
else
gtk_list_insert_items( GTK_LIST (m_list), gitem_list, pos );
gtk_signal_connect( GTK_OBJECT(list_item), "select",
GTK_SIGNAL_FUNC(gtk_listitem_select_callback), (gpointer)this );
if (HasFlag(wxLB_MULTIPLE) || HasFlag(wxLB_EXTENDED))
gtk_signal_connect( GTK_OBJECT(list_item), "deselect",
GTK_SIGNAL_FUNC(gtk_listitem_deselect_callback), (gpointer)this );
gtk_signal_connect( GTK_OBJECT(list_item),
"button_press_event",
(GtkSignalFunc)gtk_listbox_button_press_callback,
(gpointer) this );
gtk_signal_connect_after( GTK_OBJECT(list_item),
"button_release_event",
(GtkSignalFunc)gtk_listbox_button_release_callback,
(gpointer) this );
gtk_signal_connect( GTK_OBJECT(list_item),
"key_press_event",
(GtkSignalFunc)gtk_listbox_key_press_callback,
(gpointer)this );
ConnectWidget( list_item );
gtk_widget_show( list_item );
if (GTK_WIDGET_REALIZED(m_widget))
{
gtk_widget_realize( list_item );
gtk_widget_realize( GTK_BIN(list_item)->child );
// Apply current widget style to the new list_item
if (m_widgetStyle)
{
gtk_widget_set_style( GTK_WIDGET( list_item ), m_widgetStyle );
GtkBin *bin = GTK_BIN( list_item );
GtkWidget *label = GTK_WIDGET( bin->child );
gtk_widget_set_style( label, m_widgetStyle );
}
#if wxUSE_TOOLTIPS
if (m_tooltip) m_tooltip->Apply( this );
#endif
}
}
void wxListBox::DoSetItems( const wxArrayString& items,
void **clientData)
{
Clear();
DoInsertItems(items, 0);
if ( clientData )
{
size_t count = items.GetCount();
for ( size_t n = 0; n < count; n++ )
{
SetClientData(n, clientData[n]);
}
}
}
// ----------------------------------------------------------------------------
// client data
// ----------------------------------------------------------------------------
void wxListBox::DoSetItemClientData( int n, void* clientData )
{
wxCHECK_RET( m_widget != NULL, wxT("invalid listbox control") );
wxNode *node = m_clientList.Nth( n );
wxCHECK_RET( node, wxT("invalid index in wxListBox::DoSetItemClientData") );
node->SetData( (wxObject*) clientData );
}
void* wxListBox::DoGetItemClientData( int n ) const
{
wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid listbox control") );
wxNode *node = m_clientList.Nth( n );
wxCHECK_MSG( node, NULL, wxT("invalid index in wxListBox::DoGetItemClientData") );
return node->Data();
}
void wxListBox::DoSetItemClientObject( int n, wxClientData* clientData )
{
wxCHECK_RET( m_widget != NULL, wxT("invalid listbox control") );
wxNode *node = m_clientList.Nth( n );
wxCHECK_RET( node, wxT("invalid index in wxListBox::DoSetItemClientObject") );
wxClientData *cd = (wxClientData*) node->Data();
delete cd;
node->SetData( (wxObject*) clientData );
}
wxClientData* wxListBox::DoGetItemClientObject( int n ) const
{
wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid listbox control") );
wxNode *node = m_clientList.Nth( n );
wxCHECK_MSG( node, (wxClientData *)NULL,
wxT("invalid index in wxListBox::DoGetItemClientObject") );
return (wxClientData*) node->Data();
}
void wxListBox::Clear()
{
wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
gtk_list_clear_items( m_list, 0, GetCount() );
if ( HasClientObjectData() )
{
// destroy the data (due to Robert's idea of using wxList<wxObject>
// and not wxList<wxClientData> we can't just say
// m_clientList.DeleteContents(TRUE) - this would crash!
wxNode *node = m_clientList.First();
while ( node )
{
delete (wxClientData *)node->Data();
node = node->Next();
}
}
m_clientList.Clear();
if ( m_strings )
m_strings->Clear();
}
void wxListBox::Delete( int n )
{
wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
GList *child = g_list_nth( m_list->children, n );
wxCHECK_RET( child, wxT("wrong listbox index") );
GList *list = g_list_append( (GList*) NULL, child->data );
gtk_list_remove_items( m_list, list );
g_list_free( list );
wxNode *node = m_clientList.Nth( n );
if ( node )
{
if ( m_clientDataItemsType == wxClientData_Object )
{
wxClientData *cd = (wxClientData*)node->Data();
delete cd;
}
m_clientList.DeleteNode( node );
}
if ( m_strings )
m_strings->Remove(n);
}
// ----------------------------------------------------------------------------
// string list access
// ----------------------------------------------------------------------------
void wxListBox::SetString( int n, const wxString &string )
{
wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
GList *child = g_list_nth( m_list->children, n );
if (child)
{
GtkBin *bin = GTK_BIN( child->data );
GtkLabel *label = GTK_LABEL( bin->child );
wxString str;
#if wxUSE_CHECKLISTBOX
if (m_hasCheckBoxes)
str += wxCHECKLBOX_STRING;
#endif // wxUSE_CHECKLISTBOX
str += string;
gtk_label_set( label, str.mbc_str() );
}
else
{
wxFAIL_MSG(wxT("wrong listbox index"));
}
}
wxString wxListBox::GetString( int n ) const
{
wxCHECK_MSG( m_list != NULL, wxT(""), wxT("invalid listbox") );
GList *child = g_list_nth( m_list->children, n );
if (child)
{
GtkBin *bin = GTK_BIN( child->data );
GtkLabel *label = GTK_LABEL( bin->child );
wxString str = wxString(GET_REAL_LABEL(label->label),*wxConvCurrent);
return str;
}
wxFAIL_MSG(wxT("wrong listbox index"));
return wxT("");
}
int wxListBox::GetCount() const
{
wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
GList *children = m_list->children;
return g_list_length(children);
}
int wxListBox::FindString( const wxString &item ) const
{
wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
GList *child = m_list->children;
int count = 0;
while (child)
{
GtkBin *bin = GTK_BIN( child->data );
GtkLabel *label = GTK_LABEL( bin->child );
wxString str = wxString(GET_REAL_LABEL(label->label),*wxConvCurrent);
if (str == item)
return count;
count++;
child = child->next;
}
// it's not an error if the string is not found -> no wxCHECK
return wxNOT_FOUND;
}
// ----------------------------------------------------------------------------
// selection
// ----------------------------------------------------------------------------
int wxListBox::GetSelection() const
{
wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
GList *child = m_list->children;
int count = 0;
while (child)
{
if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED) return count;
count++;
child = child->next;
}
return -1;
}
int wxListBox::GetSelections( wxArrayInt& aSelections ) const
{
wxCHECK_MSG( m_list != NULL, -1, wxT("invalid listbox") );
// get the number of selected items first
GList *child = m_list->children;
int count = 0;
for (child = m_list->children; child != NULL; child = child->next)
{
if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED)
count++;
}
aSelections.Empty();
if (count > 0)
{
// now fill the list
aSelections.Alloc(count); // optimization attempt
int i = 0;
for (child = m_list->children; child != NULL; child = child->next, i++)
{
if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED)
aSelections.Add(i);
}
}
return count;
}
bool wxListBox::IsSelected( int n ) const
{
wxCHECK_MSG( m_list != NULL, FALSE, wxT("invalid listbox") );
GList *target = g_list_nth( m_list->children, n );
wxCHECK_MSG( target, FALSE, wxT("invalid listbox index") );
return (GTK_WIDGET(target->data)->state == GTK_STATE_SELECTED) ;
}
void wxListBox::SetSelection( int n, bool select )
{
wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
m_blockEvent = TRUE;
if (select)
{
if ((m_windowStyle & wxLB_SINGLE) != 0)
gtk_list_unselect_item( m_list, m_prevSelection );
gtk_list_select_item( m_list, n );
m_prevSelection = n;
}
else
gtk_list_unselect_item( m_list, n );
m_blockEvent = FALSE;
}
void wxListBox::DoSetFirstItem( int n )
{
wxCHECK_RET( m_list, wxT("invalid listbox") );
if (gdk_pointer_is_grabbed () && GTK_WIDGET_HAS_GRAB (m_list))
return;
// terribly efficient
const gchar *vadjustment_key = "gtk-vadjustment";
guint vadjustment_key_id = g_quark_from_static_string (vadjustment_key);
GtkAdjustment *adjustment =
(GtkAdjustment*) gtk_object_get_data_by_id (GTK_OBJECT (m_list), vadjustment_key_id);
wxCHECK_RET( adjustment, wxT("invalid listbox code") );
GList *target = g_list_nth( m_list->children, n );
wxCHECK_RET( target, wxT("invalid listbox index") );
GtkWidget *item = GTK_WIDGET(target->data);
wxCHECK_RET( item, wxT("invalid listbox code") );
if (item->allocation.y == -1)
{
wxlistbox_idle_struct* data = new wxlistbox_idle_struct;
data->m_listbox = this;
data->m_item = n;
data->m_tag = gtk_idle_add_priority( 800, wxlistbox_idle_callback, (gpointer) data );
return;
}
float y = item->allocation.y;
if (y > adjustment->upper - adjustment->page_size)
y = adjustment->upper - adjustment->page_size;
gtk_adjustment_set_value( adjustment, y );
}
// ----------------------------------------------------------------------------
// helpers
// ----------------------------------------------------------------------------
int wxListBox::GtkGetIndex( GtkWidget *item ) const
{
if (item)
{
GList *child = m_list->children;
int count = 0;
while (child)
{
if (GTK_WIDGET(child->data) == item) return count;
count++;
child = child->next;
}
}
return -1;
}
#if wxUSE_TOOLTIPS
void wxListBox::ApplyToolTip( GtkTooltips *tips, const wxChar *tip )
{
GList *child = m_list->children;
while (child)
{
gtk_tooltips_set_tip( tips, GTK_WIDGET( child->data ), wxConvCurrent->cWX2MB(tip), (gchar*) NULL );
child = child->next;
}
}
#endif // wxUSE_TOOLTIPS
GtkWidget *wxListBox::GetConnectWidget()
{
return GTK_WIDGET(m_list);
}
bool wxListBox::IsOwnGtkWindow( GdkWindow *window )
{
if (GTK_WIDGET(m_list)->window == window) return TRUE;
GList *child = m_list->children;
while (child)
{
GtkWidget *bin = GTK_WIDGET( child->data );
if (bin->window == window) return TRUE;
child = child->next;
}
return FALSE;
}
void wxListBox::ApplyWidgetStyle()
{
SetWidgetStyle();
if (m_backgroundColour.Ok())
{
GdkWindow *window = GTK_WIDGET(m_list)->window;
if ( window )
{
m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
gdk_window_set_background( window, m_backgroundColour.GetColor() );
gdk_window_clear( window );
}
}
GList *child = m_list->children;
while (child)
{
gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
GtkBin *bin = GTK_BIN( child->data );
GtkWidget *label = GTK_WIDGET( bin->child );
gtk_widget_set_style( label, m_widgetStyle );
child = child->next;
}
}
void wxListBox::OnInternalIdle()
{
wxCursor cursor = m_cursor;
if (g_globalCursor.Ok()) cursor = g_globalCursor;
if (GTK_WIDGET(m_list)->window && cursor.Ok())
{
/* I now set the cursor the anew in every OnInternalIdle call
as setting the cursor in a parent window also effects the
windows above so that checking for the current cursor is
not possible. */
gdk_window_set_cursor( GTK_WIDGET(m_list)->window, cursor.GetCursor() );
GList *child = m_list->children;
while (child)
{
GtkBin *bin = GTK_BIN( child->data );
GtkWidget *label = GTK_WIDGET( bin->child );
if (!label->window)
break;
else
gdk_window_set_cursor( label->window, cursor.GetCursor() );
child = child->next;
}
}
UpdateWindowUI();
}
wxSize wxListBox::DoGetBestSize() const
{
int lbWidth = 100; // some defaults
int lbHeight = 110;
int wLine;
// Find the widest line
for(int i = 0; i < GetCount(); i++) {
wxString str(GetString(i));
GetTextExtent(str, &wLine, NULL);
lbWidth = wxMax(lbWidth, wLine);
}
// Add room for the scrollbar
lbWidth += wxSystemSettings::GetSystemMetric(wxSYS_VSCROLL_X);
// And just a bit more
int cx, cy;
GetTextExtent("X", &cx, &cy);
lbWidth += 3 * cx;
// don't make the listbox too tall (limit height to around 10 items) but don't
// make it too small neither
lbHeight = (cy+4) * wxMin(wxMax(GetCount(), 3), 10);
return wxSize(lbWidth, lbHeight);
}
#endif
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