A little clarification

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

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

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "bmpbuttn.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#include "wx/defs.h"

#if wxUSE_BMPBUTTON

#include "wx/bmpbuttn.h"

#include "wx/gtk/private.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)

wxBitmapButtonBase::wxBitmapButtonBase()
                                      : m_bmpNormal(), 
                                        m_bmpSelected(), 
                                        m_bmpFocus(), 
                                        m_bmpDisabled(), 
                                        m_marginX(0), 
                                        m_marginY(0)
{
}

void wxBitmapButton::Init()
{
    m_hasFocus =
    m_isSelected = FALSE;
}

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;

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

    m_bmpNormal   =
    m_bmpDisabled =
    m_bmpFocus    =
    m_bmpSelected = 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_bmpNormal.Ok())
    {
        wxSize newSize = size;
        int border = (style & wxNO_BORDER) ? 4 : 10;
        if (newSize.x == -1)
            newSize.x = m_bmpNormal.GetWidth()+border;
        if (newSize.y == -1)
            newSize.y = m_bmpNormal.GetHeight()+border;
        SetSize( newSize.x, newSize.y );
        OnSetBitmap();
    }

    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();
    InheritAttributes();

    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()
{
    if ( !BUTTON_CHILD(m_widget) )
        return;

    wxButton::ApplyWidgetStyle();
}

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

    wxBitmap the_one;
    if (!m_isEnabled)
        the_one = m_bmpDisabled;
    else if (m_isSelected)
        the_one = m_bmpSelected;
    else if (m_hasFocus)
        the_one = m_bmpFocus;
    else
    {
        if (m_isSelected)
        {
            the_one = m_bmpSelected;
        }
        else
        {
            if (m_hasFocus)
                the_one = m_bmpFocus;
            else
                the_one = m_bmpNormal;
        }
    }

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

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

    GtkWidget *child = BUTTON_CHILD(m_widget);
    if (child == NULL)
    {
        // initial bitmap
        GtkWidget *pixmap = gtk_pixmap_new(the_one.GetPixmap(), mask);
        gtk_widget_show(pixmap);
        gtk_container_add(GTK_CONTAINER(m_widget), pixmap);
    }
    else
    {   // subsequent bitmaps
        GtkPixmap *g_pixmap = GTK_PIXMAP(child);
        gtk_pixmap_set(g_pixmap, the_one.GetPixmap(), mask);
    }
}

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

    OnSetBitmap();

    return TRUE;
}

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

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

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

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

#endif // wxUSE_BMPBUTTON