Changed code to get rid of a compiler warning about statement always being FALSE

[wxWidgets.git] / src / gtk / bmpbuttn.cpp

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

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

#include "wx/bmpbuttn.h"

#if wxUSE_BMPBUTTON

#include <gdk/gdk.h>
#include <gtk/gtk.h>

//-----------------------------------------------------------------------------
// classes
//-----------------------------------------------------------------------------

class wxBitmapButton;

//-----------------------------------------------------------------------------
// idle system
//-----------------------------------------------------------------------------

extern void wxapp_install_idle_handler();
extern bool g_isIdle;

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

extern bool   g_blockEventsOnDrag;

//-----------------------------------------------------------------------------
// "clicked"
//-----------------------------------------------------------------------------

static void gtk_bmpbutton_clicked_callback( GtkWidget *WXUNUSED(widget), wxBitmapButton *button )
{
    if (g_isIdle)
        wxapp_install_idle_handler();

    if (!button->m_hasVMT) return;
    if (g_blockEventsOnDrag) return;

    wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
    event.SetEventObject(button);
    button->GetEventHandler()->ProcessEvent(event);
}

//-----------------------------------------------------------------------------
// "enter"
//-----------------------------------------------------------------------------

static void gtk_bmpbutton_enter_callback( GtkWidget *WXUNUSED(widget), wxBitmapButton *button )
{
    if (!button->m_hasVMT) return;
    if (g_blockEventsOnDrag) return;

    button->HasFocus();
}

//-----------------------------------------------------------------------------
// "leave"
//-----------------------------------------------------------------------------

static void gtk_bmpbutton_leave_callback( GtkWidget *WXUNUSED(widget), wxBitmapButton *button )
{
    if (!button->m_hasVMT) return;
    if (g_blockEventsOnDrag) return;

    button->NotFocus();
}

//-----------------------------------------------------------------------------
// "pressed"
//-----------------------------------------------------------------------------

static void gtk_bmpbutton_press_callback( GtkWidget *WXUNUSED(widget), wxBitmapButton *button )
{
    if (!button->m_hasVMT) return;
    if (g_blockEventsOnDrag) return;

    button->StartSelect();
}

//-----------------------------------------------------------------------------
// "released"
//-----------------------------------------------------------------------------

static void gtk_bmpbutton_release_callback( GtkWidget *WXUNUSED(widget), wxBitmapButton *button )
{
    if (!button->m_hasVMT) return;
    if (g_blockEventsOnDrag) return;

    button->EndSelect();
}

//-----------------------------------------------------------------------------
// wxBitmapButton
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxBitmapButton,wxButton)

wxBitmapButton::wxBitmapButton()
{
}

bool wxBitmapButton::Create( wxWindow *parent, wxWindowID id, const wxBitmap &bitmap,
                             const wxPoint &pos, const wxSize &size,
                             long style, const wxValidator& validator, const wxString &name )
{
    m_needParent = TRUE;
    m_acceptsFocus = TRUE;

    m_marginX =
    m_marginY = 0;

    if (!PreCreation( parent, pos, size ) ||
        !CreateBase( parent, id, pos, size, style, validator, name ))
    {
        wxFAIL_MSG( wxT("wxBitmapButton creation failed") );
        return FALSE;
    }

    m_bitmap   = bitmap;
    m_disabled = bitmap;
    m_focus    = bitmap;
    m_selected = bitmap;

    m_widget = gtk_button_new();

#if (GTK_MINOR_VERSION > 0)
    if (style & wxNO_BORDER)
       gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
#endif

    if (m_bitmap.Ok())
    {
        wxSize newSize = size;

        GdkBitmap *mask = (GdkBitmap *) NULL;
        if (m_bitmap.GetMask()) mask = m_bitmap.GetMask()->GetBitmap();
        GtkWidget *pixmap = gtk_pixmap_new( m_bitmap.GetPixmap(), mask );

        gtk_widget_show( pixmap );
        gtk_container_add( GTK_CONTAINER(m_widget), pixmap );

        int border = 10;
        if (style & wxNO_BORDER) border = 4;
        if (newSize.x == -1) newSize.x = m_bitmap.GetWidth()+border;
        if (newSize.y == -1) newSize.y = m_bitmap.GetHeight()+border;
        SetSize( newSize.x, newSize.y );
    }

    gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
      GTK_SIGNAL_FUNC(gtk_bmpbutton_clicked_callback), (gpointer*)this );

    gtk_signal_connect( GTK_OBJECT(m_widget), "enter",
      GTK_SIGNAL_FUNC(gtk_bmpbutton_enter_callback), (gpointer*)this );
    gtk_signal_connect( GTK_OBJECT(m_widget), "leave",
      GTK_SIGNAL_FUNC(gtk_bmpbutton_leave_callback), (gpointer*)this );
    gtk_signal_connect( GTK_OBJECT(m_widget), "pressed",
      GTK_SIGNAL_FUNC(gtk_bmpbutton_press_callback), (gpointer*)this );
    gtk_signal_connect( GTK_OBJECT(m_widget), "released",
      GTK_SIGNAL_FUNC(gtk_bmpbutton_release_callback), (gpointer*)this );

    m_parent->DoAddChild( this );

    PostCreation();

    SetBackgroundColour( parent->GetBackgroundColour() );

    Show( TRUE );

    return TRUE;
}

void wxBitmapButton::SetDefault()
{
    GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
    gtk_widget_grab_default( m_widget );

    SetSize( m_x, m_y, m_width, m_height );
}

void wxBitmapButton::SetLabel( const wxString &label )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid button") );

    wxControl::SetLabel( label );
}

wxString wxBitmapButton::GetLabel() const
{
    wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid button") );

    return wxControl::GetLabel();
}

void wxBitmapButton::ApplyWidgetStyle()
{
}

void wxBitmapButton::SetBitmap()
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid button") );

    wxBitmap the_one;

    if (!m_isEnabled)
        the_one = m_disabled;
    else
    {
        if (m_isSelected)
        {
            the_one = m_selected;
        }
        else
        {
            if (m_hasFocus)
                the_one = m_focus;
            else
                the_one = m_bitmap;
        }
    }

    if (!the_one.Ok()) the_one = m_bitmap;
    if (!the_one.Ok()) return;

    GtkButton *bin = GTK_BUTTON( m_widget );
    GtkPixmap *g_pixmap = GTK_PIXMAP( bin->child );

    GdkBitmap *mask = (GdkBitmap *) NULL;
    if (the_one.GetMask()) mask = the_one.GetMask()->GetBitmap();

    gtk_pixmap_set( g_pixmap, the_one.GetPixmap(), mask );
}

void wxBitmapButton::SetBitmapDisabled( const wxBitmap& bitmap )
{
  wxCHECK_RET( m_widget != NULL, wxT("invalid button") );

  if ( ! m_disabled.Ok() ) return;
  m_disabled = bitmap;

  SetBitmap();
}

void wxBitmapButton::SetBitmapFocus( const wxBitmap& bitmap )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid button") );

    if ( ! m_focus.Ok() ) return;
    m_focus = bitmap;

    SetBitmap();
}

void wxBitmapButton::SetBitmapLabel( const wxBitmap& bitmap )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid button") );

    if (!m_bitmap.Ok()) return;
    m_bitmap = bitmap;

    SetBitmap();
}

void wxBitmapButton::SetBitmapSelected( const wxBitmap& bitmap )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid button") );

    if ( ! m_selected.Ok() ) return;
    m_selected = bitmap;

    SetBitmap();
}

bool wxBitmapButton::Enable( bool enable )
{
    if ( !wxWindow::Enable(enable) )
        return FALSE;

    SetBitmap();

    return TRUE;
}

void wxBitmapButton::HasFocus()
{
    m_hasFocus = TRUE;
    SetBitmap();
}

void wxBitmapButton::NotFocus()
{
    m_hasFocus = FALSE;
    SetBitmap();
}

void wxBitmapButton::StartSelect()
{
    m_isSelected = TRUE;
    SetBitmap();
}

void wxBitmapButton::EndSelect()
{
    m_isSelected = FALSE;
    SetBitmap();
}

#endif // wxUSE_BMPBUTTON