src/gtk/button.cpp

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

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

#if wxUSE_BUTTON

#ifndef WX_PRECOMP
    #include "wx/button.h"
#endif

#include "wx/stockitem.h"

#include "wx/gtk/private.h"

// ----------------------------------------------------------------------------
// GTK callbacks
// ----------------------------------------------------------------------------

extern "C"
{

static void
wxgtk_button_clicked_callback(GtkWidget *WXUNUSED(widget), wxButton *button)
{
    if ( button->GTKShouldIgnoreEvent() )
        return;

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

static void
wxgtk_button_enter_callback(GtkWidget *WXUNUSED(widget), wxButton *button)
{
    if ( button->GTKShouldIgnoreEvent() )
        return;

    button->GTKMouseEnters();
}

static void
wxgtk_button_leave_callback(GtkWidget *WXUNUSED(widget), wxButton *button)
{
    if ( button->GTKShouldIgnoreEvent() )
        return;

    button->GTKMouseLeaves();
}

static void
wxgtk_button_press_callback(GtkWidget *WXUNUSED(widget), wxButton *button)
{
    if ( button->GTKShouldIgnoreEvent() )
        return;

    button->GTKPressed();
}

static void
wxgtk_button_released_callback(GtkWidget *WXUNUSED(widget), wxButton *button)
{
    if ( button->GTKShouldIgnoreEvent() )
        return;

    button->GTKReleased();
}

//-----------------------------------------------------------------------------
// "style_set" from m_widget
//-----------------------------------------------------------------------------

static void
wxgtk_button_style_set_callback(GtkWidget* widget, GtkStyle*, wxButton* win)
{
    /* the default button has a border around it */
    wxWindow* parent = win->GetParent();
    if (parent && parent->m_wxwindow && GTK_WIDGET_CAN_DEFAULT(widget))
    {
        GtkBorder* border = NULL;
        gtk_widget_style_get(widget, "default_border", &border, NULL);
        if (border)
        {
            win->MoveWindow(
                win->m_x - border->left,
                win->m_y - border->top,
                win->m_width + border->left + border->right,
                win->m_height + border->top + border->bottom);
            gtk_border_free(border);
        }
    }
}

} // extern "C"

//-----------------------------------------------------------------------------
// wxButton
//-----------------------------------------------------------------------------

bool wxButton::Create(wxWindow *parent,
                      wxWindowID id,
                      const wxString &label,
                      const wxPoint& pos,
                      const wxSize& size,
                      long style,
                      const wxValidator& validator,
                      const wxString& name)
{
    if (!PreCreation( parent, pos, size ) ||
        !CreateBase( parent, id, pos, size, style, validator, name ))
    {
        wxFAIL_MSG( wxT("wxButton creation failed") );
        return false;
    }

    // create either a standard button with text label (which may still contain
    // an image under GTK+ 2.6+) or a bitmap-only button if we don't have any
    // label
    const bool
        useLabel = !(style & wxBU_NOTEXT) && (!label.empty() || wxIsStockID(id));
    if ( useLabel )
    {
        m_widget = gtk_button_new_with_mnemonic("");
    }
    else // no label, suppose we will have a bitmap
    {
        m_widget = gtk_button_new();

        GtkWidget *image = gtk_image_new();
        gtk_widget_show(image);
        gtk_container_add(GTK_CONTAINER(m_widget), image);
    }

    g_object_ref(m_widget);

    float x_alignment = 0.5;
    if (HasFlag(wxBU_LEFT))
        x_alignment = 0.0;
    else if (HasFlag(wxBU_RIGHT))
        x_alignment = 1.0;

    float y_alignment = 0.5;
    if (HasFlag(wxBU_TOP))
        y_alignment = 0.0;
    else if (HasFlag(wxBU_BOTTOM))
        y_alignment = 1.0;

    gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);

    if ( useLabel )
        SetLabel(label);

    if (style & wxNO_BORDER)
       gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );

    g_signal_connect_after (m_widget, "clicked",
                            G_CALLBACK (wxgtk_button_clicked_callback),
                            this);

    g_signal_connect_after (m_widget, "style_set",
                            G_CALLBACK (wxgtk_button_style_set_callback),
                            this);

    m_parent->DoAddChild( this );

    PostCreation(size);

    return true;
}


wxWindow *wxButton::SetDefault()
{
    wxWindow *oldDefault = wxButtonBase::SetDefault();

    GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
    gtk_widget_grab_default( m_widget );

    // resize for default border
    wxgtk_button_style_set_callback( m_widget, NULL, this );

    return oldDefault;
}

/* static */
wxSize wxButtonBase::GetDefaultSize()
{
    static wxSize size = wxDefaultSize;
    if (size == wxDefaultSize)
    {
        // NB: Default size of buttons should be same as size of stock
        //     buttons as used in most GTK+ apps. Unfortunately it's a little
        //     tricky to obtain this size: stock button's size may be smaller
        //     than size of button in GtkButtonBox and vice versa,
        //     GtkButtonBox's minimal button size may be smaller than stock
        //     button's size. We have to retrieve both values and combine them.

        GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
        GtkWidget *box = gtk_hbutton_box_new();
        GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
        gtk_container_add(GTK_CONTAINER(box), btn);
        gtk_container_add(GTK_CONTAINER(wnd), box);
        GtkRequisition req;
        gtk_widget_size_request(btn, &req);

        gint minwidth, minheight;
        gtk_widget_style_get(box,
                             "child-min-width", &minwidth,
                             "child-min-height", &minheight,
                             NULL);

        size.x = wxMax(minwidth, req.width);
        size.y = wxMax(minheight, req.height);

        gtk_widget_destroy(wnd);
    }
    return size;
}

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

    wxString label(lbl);

    if (label.empty() && wxIsStockID(m_windowId))
        label = wxGetStockLabel(m_windowId);

    wxControl::SetLabel(label);

    // don't use label if it was explicitly disabled
    if ( HasFlag(wxBU_NOTEXT) )
        return;

    if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
    {
        const char *stock = wxGetStockGtkID(m_windowId);
        if (stock)
        {
            gtk_button_set_label(GTK_BUTTON(m_widget), stock);
            gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
            return;
        }
    }

    // this call is necessary if the button had been initially created without
    // a (text) label -- then we didn't use gtk_button_new_with_mnemonic() and
    // so "use-underline" GtkButton property remained unset
    gtk_button_set_use_underline(GTK_BUTTON(m_widget), TRUE);
    const wxString labelGTK = GTKConvertMnemonics(label);
    gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
    gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);

    GTKApplyWidgetStyle( false );
}

bool wxButton::Enable( bool enable )
{
    if (!base_type::Enable(enable))
        return false;

    gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);

    if (enable)
        GTKFixSensitivity();

    GTKUpdateBitmap();

    return true;
}

GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
{
    return GTK_BUTTON(m_widget)->event_window;
}

void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
{
    gtk_widget_modify_style(m_widget, style);
    GtkWidget *child = GTK_BIN(m_widget)->child;
    gtk_widget_modify_style(child, style);

    // for buttons with images, the path to the label is (at least in 2.12)
    // GtkButton -> GtkAlignment -> GtkHBox -> GtkLabel
    if ( GTK_IS_ALIGNMENT(child) )
    {
        GtkWidget *box = GTK_BIN(child)->child;
        if ( GTK_IS_BOX(box) )
        {
            for (GList* item = GTK_BOX(box)->children; item; item = item->next)
            {
                GtkBoxChild* boxChild = static_cast<GtkBoxChild*>(item->data);
                gtk_widget_modify_style(boxChild->widget, style);
            }
        }
    }
}

wxSize wxButton::DoGetBestSize() const
{
    // the default button in wxGTK is bigger than the other ones because of an
    // extra border around it, but we don't want to take it into account in
    // our size calculations (otherwise the result is visually ugly), so
    // always return the size of non default button from here
    const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
    if ( isDefault )
    {
        // temporarily unset default flag
        GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
    }

    wxSize ret( wxControl::DoGetBestSize() );

    if ( isDefault )
    {
        // set it back again
        GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
    }

    if (!HasFlag(wxBU_EXACTFIT))
    {
        wxSize defaultSize = GetDefaultSize();
        if (ret.x < defaultSize.x)
            ret.x = defaultSize.x;
        if (ret.y < defaultSize.y)
            ret.y = defaultSize.y;
    }

    CacheBestSize(ret);
    return ret;
}

// static
wxVisualAttributes
wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
{
    return GetDefaultAttributesFromGTKWidget(gtk_button_new);
}

// ----------------------------------------------------------------------------
// bitmaps support
// ----------------------------------------------------------------------------

void wxButton::GTKMouseEnters()
{
    m_isCurrent = true;

    GTKUpdateBitmap();
}

void wxButton::GTKMouseLeaves()
{
    m_isCurrent = false;

    GTKUpdateBitmap();
}

void wxButton::GTKPressed()
{
    m_isPressed = true;

    GTKUpdateBitmap();
}

void wxButton::GTKReleased()
{
    m_isPressed = false;

    GTKUpdateBitmap();
}

void wxButton::GTKOnFocus(wxFocusEvent& event)
{
    event.Skip();

    GTKUpdateBitmap();
}

wxButton::State wxButton::GTKGetCurrentState() const
{
    if ( !IsThisEnabled() )
        return m_bitmaps[State_Disabled].IsOk() ? State_Disabled : State_Normal;

    if ( m_isPressed && m_bitmaps[State_Pressed].IsOk() )
        return State_Pressed;

    if ( m_isCurrent && m_bitmaps[State_Current].IsOk() )
        return State_Current;

    if ( HasFocus() && m_bitmaps[State_Focused].IsOk() )
        return State_Focused;

    return State_Normal;
}

void wxButton::GTKUpdateBitmap()
{
    // if we don't show bitmaps at all, there is nothing to update
    if ( m_bitmaps[State_Normal].IsOk() )
    {
        // if we do show them, this will return a state for which we do have a
        // valid bitmap
        State state = GTKGetCurrentState();

        GTKDoShowBitmap(m_bitmaps[state]);
    }
}

void wxButton::GTKDoShowBitmap(const wxBitmap& bitmap)
{
    wxASSERT_MSG( bitmap.IsOk(), "invalid bitmap" );

    GtkWidget *image;
    if ( DontShowLabel() )
    {
        image = GTK_BIN(m_widget)->child;
    }
    else // have both label and bitmap
    {
#ifdef __WXGTK26__
        if ( !gtk_check_version(2,6,0) )
        {
            image = gtk_button_get_image(GTK_BUTTON(m_widget));
        }
        else
#endif // __WXGTK26__
        {
            // buttons with both label and bitmap are only supported with GTK+
            // 2.6 so far
            //
            // it shouldn't be difficult to implement them ourselves for the
            // previous GTK+ versions by stuffing a container with a label and
            // an image inside GtkButton but there doesn't seem to be much
            // point in doing this for ancient GTK+ versions
            return;
        }
    }

    wxCHECK_RET( image && GTK_IS_IMAGE(image), "must have image widget" );

    gtk_image_set_from_pixbuf(GTK_IMAGE(image), bitmap.GetPixbuf());
}

wxBitmap wxButton::DoGetBitmap(State which) const
{
    return m_bitmaps[which];
}

void wxButton::DoSetBitmap(const wxBitmap& bitmap, State which)
{
    switch ( which )
    {
        case State_Normal:
            if ( DontShowLabel() )
            {
                // we only have the bitmap in this button, never remove it but
                // do invalidate the best size when the bitmap (and presumably
                // its size) changes
                InvalidateBestSize();
            }
#ifdef __WXGTK26__
            // normal image is special: setting it enables images for the button and
            // resetting it to nothing disables all of them
            else if ( !gtk_check_version(2,6,0) )
            {
                GtkWidget *image = gtk_button_get_image(GTK_BUTTON(m_widget));
                if ( image && !bitmap.IsOk() )
                {
                    gtk_container_remove(GTK_CONTAINER(m_widget), image);
                }
                else if ( !image && bitmap.IsOk() )
                {
                    image = gtk_image_new();
                    gtk_button_set_image(GTK_BUTTON(m_widget), image);
                }
                else // image presence or absence didn't change
                {
                    // don't invalidate best size below
                    break;
                }

                InvalidateBestSize();
            }
#endif // GTK+ 2.6+
            break;

        case State_Pressed:
            if ( bitmap.IsOk() )
            {
                if ( !m_bitmaps[which].IsOk() )
                {
                    // we need to install the callbacks to be notified about
                    // the button pressed state change
                    g_signal_connect
                    (
                        m_widget,
                        "pressed",
                        G_CALLBACK(wxgtk_button_press_callback),
                        this
                    );

                    g_signal_connect
                    (
                        m_widget,
                        "released",
                        G_CALLBACK(wxgtk_button_released_callback),
                        this
                    );
                }
            }
            else // no valid bitmap
            {
                if ( m_bitmaps[which].IsOk() )
                {
                    // we don't need to be notified about the button pressed
                    // state changes any more
                    g_signal_handlers_disconnect_by_func
                    (
                        m_widget,
                        (gpointer)wxgtk_button_press_callback,
                        this
                    );

                    g_signal_handlers_disconnect_by_func
                    (
                        m_widget,
                        (gpointer)wxgtk_button_released_callback,
                        this
                    );

                    // also make sure we don't remain stuck in pressed state
                    if ( m_isPressed )
                    {
                        m_isPressed = false;
                        GTKUpdateBitmap();
                    }
                }
            }
            break;

        case State_Current:
            // the logic here is the same as above for State_Pressed: we need
            // to connect the handlers if we must be notified about the changes
            // in the button current state and we disconnect them when/if we
            // don't need them any more
            if ( bitmap.IsOk() )
            {
                if ( !m_bitmaps[which].IsOk() )
                {
                    g_signal_connect
                    (
                        m_widget,
                        "enter",
                        G_CALLBACK(wxgtk_button_enter_callback),
                        this
                    );

                    g_signal_connect
                    (
                        m_widget,
                        "leave",
                        G_CALLBACK(wxgtk_button_leave_callback),
                        this
                    );
                }
            }
            else // no valid bitmap
            {
                if ( m_bitmaps[which].IsOk() )
                {
                    g_signal_handlers_disconnect_by_func
                    (
                        m_widget,
                        (gpointer)wxgtk_button_enter_callback,
                        this
                    );

                    g_signal_handlers_disconnect_by_func
                    (
                        m_widget,
                        (gpointer)wxgtk_button_leave_callback,
                        this
                    );

                    if ( m_isCurrent )
                    {
                        m_isCurrent = false;
                        GTKUpdateBitmap();
                    }
                }
            }
            break;

        case State_Focused:
            if ( bitmap.IsOk() )
            {
                Connect(wxEVT_SET_FOCUS,
                        wxFocusEventHandler(wxButton::GTKOnFocus));
                Connect(wxEVT_KILL_FOCUS,
                        wxFocusEventHandler(wxButton::GTKOnFocus));
            }
            else // no valid focused bitmap
            {
                Disconnect(wxEVT_SET_FOCUS,
                           wxFocusEventHandler(wxButton::GTKOnFocus));
                Disconnect(wxEVT_KILL_FOCUS,
                           wxFocusEventHandler(wxButton::GTKOnFocus));
            }
            break;

        default:
            // no callbacks to connect/disconnect
            ;
    }

    m_bitmaps[which] = bitmap;

    // update the bitmap immediately if necessary, otherwise it will be done
    // when the bitmap for the corresponding state is needed the next time by
    // GTKUpdateBitmap()
    if ( bitmap.IsOk() && which == GTKGetCurrentState() )
    {
        GTKDoShowBitmap(bitmap);
    }
}

void wxButton::DoSetBitmapPosition(wxDirection dir)
{
#ifdef __WXGTK210__
    if ( !gtk_check_version(2,10,0) )
    {
        GtkPositionType gtkpos;
        switch ( dir )
        {
            default:
                wxFAIL_MSG( "invalid position" );
                // fall through

            case wxLEFT:
                gtkpos = GTK_POS_LEFT;
                break;

            case wxRIGHT:
                gtkpos = GTK_POS_RIGHT;
                break;

            case wxTOP:
                gtkpos = GTK_POS_TOP;
                break;

            case wxBOTTOM:
                gtkpos = GTK_POS_BOTTOM;
                break;
        }

        gtk_button_set_image_position(GTK_BUTTON(m_widget), gtkpos);
        InvalidateBestSize();
    }
#endif // GTK+ 2.10+
}

#endif // wxUSE_BUTTON
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/gtk/button.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Id: $Id$
	6	// Copyright: (c) 1998 Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	// For compilers that support precompilation, includes "wx.h".
	11	#include "wx/wxprec.h"
	12
	13	#if wxUSE_BUTTON
	14
	15	#ifndef WX_PRECOMP
	16	#include "wx/button.h"
	17	#endif
	18
	19	#include "wx/stockitem.h"
	20
	21	#include "wx/gtk/private.h"
	22
	23	// ----------------------------------------------------------------------------
	24	// GTK callbacks
	25	// ----------------------------------------------------------------------------
	26
	27	extern "C"
	28	{
	29
	30	static void
	31	wxgtk_button_clicked_callback(GtkWidget WXUNUSED(widget), wxButton button)
	32	{
	33	if ( button->GTKShouldIgnoreEvent() )
	34	return;
	35
	36	wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
	37	event.SetEventObject(button);
	38	button->HandleWindowEvent(event);
	39	}
	40
	41	static void
	42	wxgtk_button_enter_callback(GtkWidget WXUNUSED(widget), wxButton button)
	43	{
	44	if ( button->GTKShouldIgnoreEvent() )
	45	return;
	46
	47	button->GTKMouseEnters();
	48	}
	49
	50	static void
	51	wxgtk_button_leave_callback(GtkWidget WXUNUSED(widget), wxButton button)
	52	{
	53	if ( button->GTKShouldIgnoreEvent() )
	54	return;
	55
	56	button->GTKMouseLeaves();
	57	}
	58
	59	static void
	60	wxgtk_button_press_callback(GtkWidget WXUNUSED(widget), wxButton button)
	61	{
	62	if ( button->GTKShouldIgnoreEvent() )
	63	return;
	64
	65	button->GTKPressed();
	66	}
	67
	68	static void
	69	wxgtk_button_released_callback(GtkWidget WXUNUSED(widget), wxButton button)
	70	{
	71	if ( button->GTKShouldIgnoreEvent() )
	72	return;
	73
	74	button->GTKReleased();
	75	}
	76
	77	//-----------------------------------------------------------------------------
	78	// "style_set" from m_widget
	79	//-----------------------------------------------------------------------------
	80
	81	static void
	82	wxgtk_button_style_set_callback(GtkWidget* widget, GtkStyle, wxButton win)
	83	{
	84	/* the default button has a border around it */
	85	wxWindow* parent = win->GetParent();
	86	if (parent && parent->m_wxwindow && GTK_WIDGET_CAN_DEFAULT(widget))
	87	{
	88	GtkBorder* border = NULL;
	89	gtk_widget_style_get(widget, "default_border", &border, NULL);
	90	if (border)
	91	{
	92	win->MoveWindow(
	93	win->m_x - border->left,
	94	win->m_y - border->top,
	95	win->m_width + border->left + border->right,
	96	win->m_height + border->top + border->bottom);
	97	gtk_border_free(border);
	98	}
	99	}
	100	}
	101
	102	} // extern "C"
	103
	104	//-----------------------------------------------------------------------------
	105	// wxButton
	106	//-----------------------------------------------------------------------------
	107
	108	bool wxButton::Create(wxWindow *parent,
	109	wxWindowID id,
	110	const wxString &label,
	111	const wxPoint& pos,
	112	const wxSize& size,
	113	long style,
	114	const wxValidator& validator,
	115	const wxString& name)
	116	{
	117	if (!PreCreation( parent, pos, size ) \|\|
	118	!CreateBase( parent, id, pos, size, style, validator, name ))
	119	{
	120	wxFAIL_MSG( wxT("wxButton creation failed") );
	121	return false;
	122	}
	123
	124	// create either a standard button with text label (which may still contain
	125	// an image under GTK+ 2.6+) or a bitmap-only button if we don't have any
	126	// label
	127	const bool
	128	useLabel = !(style & wxBU_NOTEXT) && (!label.empty() \|\| wxIsStockID(id));
	129	if ( useLabel )
	130	{
	131	m_widget = gtk_button_new_with_mnemonic("");
	132	}
	133	else // no label, suppose we will have a bitmap
	134	{
	135	m_widget = gtk_button_new();
	136
	137	GtkWidget *image = gtk_image_new();
	138	gtk_widget_show(image);
	139	gtk_container_add(GTK_CONTAINER(m_widget), image);
	140	}
	141
	142	g_object_ref(m_widget);
	143
	144	float x_alignment = 0.5;
	145	if (HasFlag(wxBU_LEFT))
	146	x_alignment = 0.0;
	147	else if (HasFlag(wxBU_RIGHT))
	148	x_alignment = 1.0;
	149
	150	float y_alignment = 0.5;
	151	if (HasFlag(wxBU_TOP))
	152	y_alignment = 0.0;
	153	else if (HasFlag(wxBU_BOTTOM))
	154	y_alignment = 1.0;
	155
	156	gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
	157
	158	if ( useLabel )
	159	SetLabel(label);
	160
	161	if (style & wxNO_BORDER)
	162	gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
	163
	164	g_signal_connect_after (m_widget, "clicked",
	165	G_CALLBACK (wxgtk_button_clicked_callback),
	166	this);
	167
	168	g_signal_connect_after (m_widget, "style_set",
	169	G_CALLBACK (wxgtk_button_style_set_callback),
	170	this);
	171
	172	m_parent->DoAddChild( this );
	173
	174	PostCreation(size);
	175
	176	return true;
	177	}
	178
	179
	180	wxWindow *wxButton::SetDefault()
	181	{
	182	wxWindow *oldDefault = wxButtonBase::SetDefault();
	183
	184	GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
	185	gtk_widget_grab_default( m_widget );
	186
	187	// resize for default border
	188	wxgtk_button_style_set_callback( m_widget, NULL, this );
	189
	190	return oldDefault;
	191	}
	192
	193	/* static */
	194	wxSize wxButtonBase::GetDefaultSize()
	195	{
	196	static wxSize size = wxDefaultSize;
	197	if (size == wxDefaultSize)
	198	{
	199	// NB: Default size of buttons should be same as size of stock
	200	// buttons as used in most GTK+ apps. Unfortunately it's a little
	201	// tricky to obtain this size: stock button's size may be smaller
	202	// than size of button in GtkButtonBox and vice versa,
	203	// GtkButtonBox's minimal button size may be smaller than stock
	204	// button's size. We have to retrieve both values and combine them.
	205
	206	GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	207	GtkWidget *box = gtk_hbutton_box_new();
	208	GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
	209	gtk_container_add(GTK_CONTAINER(box), btn);
	210	gtk_container_add(GTK_CONTAINER(wnd), box);
	211	GtkRequisition req;
	212	gtk_widget_size_request(btn, &req);
	213
	214	gint minwidth, minheight;
	215	gtk_widget_style_get(box,
	216	"child-min-width", &minwidth,
	217	"child-min-height", &minheight,
	218	NULL);
	219
	220	size.x = wxMax(minwidth, req.width);
	221	size.y = wxMax(minheight, req.height);
	222
	223	gtk_widget_destroy(wnd);
	224	}
	225	return size;
	226	}
	227
	228	void wxButton::SetLabel( const wxString &lbl )
	229	{
	230	wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
	231
	232	wxString label(lbl);
	233
	234	if (label.empty() && wxIsStockID(m_windowId))
	235	label = wxGetStockLabel(m_windowId);
	236
	237	wxControl::SetLabel(label);
	238
	239	// don't use label if it was explicitly disabled
	240	if ( HasFlag(wxBU_NOTEXT) )
	241	return;
	242
	243	if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
	244	{
	245	const char *stock = wxGetStockGtkID(m_windowId);
	246	if (stock)
	247	{
	248	gtk_button_set_label(GTK_BUTTON(m_widget), stock);
	249	gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
	250	return;
	251	}
	252	}
	253
	254	// this call is necessary if the button had been initially created without
	255	// a (text) label -- then we didn't use gtk_button_new_with_mnemonic() and
	256	// so "use-underline" GtkButton property remained unset
	257	gtk_button_set_use_underline(GTK_BUTTON(m_widget), TRUE);
	258	const wxString labelGTK = GTKConvertMnemonics(label);
	259	gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
	260	gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
	261
	262	GTKApplyWidgetStyle( false );
	263	}
	264
	265	bool wxButton::Enable( bool enable )
	266	{
	267	if (!base_type::Enable(enable))
	268	return false;
	269
	270	gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
	271
	272	if (enable)
	273	GTKFixSensitivity();
	274
	275	GTKUpdateBitmap();
	276
	277	return true;
	278	}
	279
	280	GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
	281	{
	282	return GTK_BUTTON(m_widget)->event_window;
	283	}
	284
	285	void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
	286	{
	287	gtk_widget_modify_style(m_widget, style);
	288	GtkWidget *child = GTK_BIN(m_widget)->child;
	289	gtk_widget_modify_style(child, style);
	290
	291	// for buttons with images, the path to the label is (at least in 2.12)
	292	// GtkButton -> GtkAlignment -> GtkHBox -> GtkLabel
	293	if ( GTK_IS_ALIGNMENT(child) )
	294	{
	295	GtkWidget *box = GTK_BIN(child)->child;
	296	if ( GTK_IS_BOX(box) )
	297	{
	298	for (GList* item = GTK_BOX(box)->children; item; item = item->next)
	299	{
	300	GtkBoxChild* boxChild = static_cast<GtkBoxChild*>(item->data);
	301	gtk_widget_modify_style(boxChild->widget, style);
	302	}
	303	}
	304	}
	305	}
	306
	307	wxSize wxButton::DoGetBestSize() const
	308	{
	309	// the default button in wxGTK is bigger than the other ones because of an
	310	// extra border around it, but we don't want to take it into account in
	311	// our size calculations (otherwise the result is visually ugly), so
	312	// always return the size of non default button from here
	313	const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
	314	if ( isDefault )
	315	{
	316	// temporarily unset default flag
	317	GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
	318	}
	319
	320	wxSize ret( wxControl::DoGetBestSize() );
	321
	322	if ( isDefault )
	323	{
	324	// set it back again
	325	GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
	326	}
	327
	328	if (!HasFlag(wxBU_EXACTFIT))
	329	{
	330	wxSize defaultSize = GetDefaultSize();
	331	if (ret.x < defaultSize.x)
	332	ret.x = defaultSize.x;
	333	if (ret.y < defaultSize.y)
	334	ret.y = defaultSize.y;
	335	}
	336
	337	CacheBestSize(ret);
	338	return ret;
	339	}
	340
	341	// static
	342	wxVisualAttributes
	343	wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
	344	{
	345	return GetDefaultAttributesFromGTKWidget(gtk_button_new);
	346	}
	347
	348	// ----------------------------------------------------------------------------
	349	// bitmaps support
	350	// ----------------------------------------------------------------------------
	351
	352	void wxButton::GTKMouseEnters()
	353	{
	354	m_isCurrent = true;
	355
	356	GTKUpdateBitmap();
	357	}
	358
	359	void wxButton::GTKMouseLeaves()
	360	{
	361	m_isCurrent = false;
	362
	363	GTKUpdateBitmap();
	364	}
	365
	366	void wxButton::GTKPressed()
	367	{
	368	m_isPressed = true;
	369
	370	GTKUpdateBitmap();
	371	}
	372
	373	void wxButton::GTKReleased()
	374	{
	375	m_isPressed = false;
	376
	377	GTKUpdateBitmap();
	378	}
	379
	380	void wxButton::GTKOnFocus(wxFocusEvent& event)
	381	{
	382	event.Skip();
	383
	384	GTKUpdateBitmap();
	385	}
	386
	387	wxButton::State wxButton::GTKGetCurrentState() const
	388	{
	389	if ( !IsThisEnabled() )
	390	return m_bitmaps[State_Disabled].IsOk() ? State_Disabled : State_Normal;
	391
	392	if ( m_isPressed && m_bitmaps[State_Pressed].IsOk() )
	393	return State_Pressed;
	394
	395	if ( m_isCurrent && m_bitmaps[State_Current].IsOk() )
	396	return State_Current;
	397
	398	if ( HasFocus() && m_bitmaps[State_Focused].IsOk() )
	399	return State_Focused;
	400
	401	return State_Normal;
	402	}
	403
	404	void wxButton::GTKUpdateBitmap()
	405	{
	406	// if we don't show bitmaps at all, there is nothing to update
	407	if ( m_bitmaps[State_Normal].IsOk() )
	408	{
	409	// if we do show them, this will return a state for which we do have a
	410	// valid bitmap
	411	State state = GTKGetCurrentState();
	412
	413	GTKDoShowBitmap(m_bitmaps[state]);
	414	}
	415	}
	416
	417	void wxButton::GTKDoShowBitmap(const wxBitmap& bitmap)
	418	{
	419	wxASSERT_MSG( bitmap.IsOk(), "invalid bitmap" );
	420
	421	GtkWidget *image;
	422	if ( DontShowLabel() )
	423	{
	424	image = GTK_BIN(m_widget)->child;
	425	}
	426	else // have both label and bitmap
	427	{
	428	#ifdef __WXGTK26__
	429	if ( !gtk_check_version(2,6,0) )
	430	{
	431	image = gtk_button_get_image(GTK_BUTTON(m_widget));
	432	}
	433	else
	434	#endif // __WXGTK26__
	435	{
	436	// buttons with both label and bitmap are only supported with GTK+
	437	// 2.6 so far
	438	//
	439	// it shouldn't be difficult to implement them ourselves for the
	440	// previous GTK+ versions by stuffing a container with a label and
	441	// an image inside GtkButton but there doesn't seem to be much
	442	// point in doing this for ancient GTK+ versions
	443	return;
	444	}
	445	}
	446
	447	wxCHECK_RET( image && GTK_IS_IMAGE(image), "must have image widget" );
	448
	449	gtk_image_set_from_pixbuf(GTK_IMAGE(image), bitmap.GetPixbuf());
	450	}
	451
	452	wxBitmap wxButton::DoGetBitmap(State which) const
	453	{
	454	return m_bitmaps[which];
	455	}
	456
	457	void wxButton::DoSetBitmap(const wxBitmap& bitmap, State which)
	458	{
	459	switch ( which )
	460	{
	461	case State_Normal:
	462	if ( DontShowLabel() )
	463	{
	464	// we only have the bitmap in this button, never remove it but
	465	// do invalidate the best size when the bitmap (and presumably
	466	// its size) changes
	467	InvalidateBestSize();
	468	}
	469	#ifdef __WXGTK26__
	470	// normal image is special: setting it enables images for the button and
	471	// resetting it to nothing disables all of them
	472	else if ( !gtk_check_version(2,6,0) )
	473	{
	474	GtkWidget *image = gtk_button_get_image(GTK_BUTTON(m_widget));
	475	if ( image && !bitmap.IsOk() )
	476	{
	477	gtk_container_remove(GTK_CONTAINER(m_widget), image);
	478	}
	479	else if ( !image && bitmap.IsOk() )
	480	{
	481	image = gtk_image_new();
	482	gtk_button_set_image(GTK_BUTTON(m_widget), image);
	483	}
	484	else // image presence or absence didn't change
	485	{
	486	// don't invalidate best size below
	487	break;
	488	}
	489
	490	InvalidateBestSize();
	491	}
	492	#endif // GTK+ 2.6+
	493	break;
	494
	495	case State_Pressed:
	496	if ( bitmap.IsOk() )
	497	{
	498	if ( !m_bitmaps[which].IsOk() )
	499	{
	500	// we need to install the callbacks to be notified about
	501	// the button pressed state change
	502	g_signal_connect
	503	(
	504	m_widget,
	505	"pressed",
	506	G_CALLBACK(wxgtk_button_press_callback),
	507	this
	508	);
	509
	510	g_signal_connect
	511	(
	512	m_widget,
	513	"released",
	514	G_CALLBACK(wxgtk_button_released_callback),
	515	this
	516	);
	517	}
	518	}
	519	else // no valid bitmap
	520	{
	521	if ( m_bitmaps[which].IsOk() )
	522	{
	523	// we don't need to be notified about the button pressed
	524	// state changes any more
	525	g_signal_handlers_disconnect_by_func
	526	(
	527	m_widget,
	528	(gpointer)wxgtk_button_press_callback,
	529	this
	530	);
	531
	532	g_signal_handlers_disconnect_by_func
	533	(
	534	m_widget,
	535	(gpointer)wxgtk_button_released_callback,
	536	this
	537	);
	538
	539	// also make sure we don't remain stuck in pressed state
	540	if ( m_isPressed )
	541	{
	542	m_isPressed = false;
	543	GTKUpdateBitmap();
	544	}
	545	}
	546	}
	547	break;
	548
	549	case State_Current:
	550	// the logic here is the same as above for State_Pressed: we need
	551	// to connect the handlers if we must be notified about the changes
	552	// in the button current state and we disconnect them when/if we
	553	// don't need them any more
	554	if ( bitmap.IsOk() )
	555	{
	556	if ( !m_bitmaps[which].IsOk() )
	557	{
	558	g_signal_connect
	559	(
	560	m_widget,
	561	"enter",
	562	G_CALLBACK(wxgtk_button_enter_callback),
	563	this
	564	);
	565
	566	g_signal_connect
	567	(
	568	m_widget,
	569	"leave",
	570	G_CALLBACK(wxgtk_button_leave_callback),
	571	this
	572	);
	573	}
	574	}
	575	else // no valid bitmap
	576	{
	577	if ( m_bitmaps[which].IsOk() )
	578	{
	579	g_signal_handlers_disconnect_by_func
	580	(
	581	m_widget,
	582	(gpointer)wxgtk_button_enter_callback,
	583	this
	584	);
	585
	586	g_signal_handlers_disconnect_by_func
	587	(
	588	m_widget,
	589	(gpointer)wxgtk_button_leave_callback,
	590	this
	591	);
	592
	593	if ( m_isCurrent )
	594	{
	595	m_isCurrent = false;
	596	GTKUpdateBitmap();
	597	}
	598	}
	599	}
	600	break;
	601
	602	case State_Focused:
	603	if ( bitmap.IsOk() )
	604	{
	605	Connect(wxEVT_SET_FOCUS,
	606	wxFocusEventHandler(wxButton::GTKOnFocus));
	607	Connect(wxEVT_KILL_FOCUS,
	608	wxFocusEventHandler(wxButton::GTKOnFocus));
	609	}
	610	else // no valid focused bitmap
	611	{
	612	Disconnect(wxEVT_SET_FOCUS,
	613	wxFocusEventHandler(wxButton::GTKOnFocus));
	614	Disconnect(wxEVT_KILL_FOCUS,
	615	wxFocusEventHandler(wxButton::GTKOnFocus));
	616	}
	617	break;
	618
	619	default:
	620	// no callbacks to connect/disconnect
	621	;
	622	}
	623
	624	m_bitmaps[which] = bitmap;
	625
	626	// update the bitmap immediately if necessary, otherwise it will be done
	627	// when the bitmap for the corresponding state is needed the next time by
	628	// GTKUpdateBitmap()
	629	if ( bitmap.IsOk() && which == GTKGetCurrentState() )
	630	{
	631	GTKDoShowBitmap(bitmap);
	632	}
	633	}
	634
	635	void wxButton::DoSetBitmapPosition(wxDirection dir)
	636	{
	637	#ifdef __WXGTK210__
	638	if ( !gtk_check_version(2,10,0) )
	639	{
	640	GtkPositionType gtkpos;
	641	switch ( dir )
	642	{
	643	default:
	644	wxFAIL_MSG( "invalid position" );
	645	// fall through
	646
	647	case wxLEFT:
	648	gtkpos = GTK_POS_LEFT;
	649	break;
	650
	651	case wxRIGHT:
	652	gtkpos = GTK_POS_RIGHT;
	653	break;
	654
	655	case wxTOP:
	656	gtkpos = GTK_POS_TOP;
	657	break;
	658
	659	case wxBOTTOM:
	660	gtkpos = GTK_POS_BOTTOM;
	661	break;
	662	}
	663
	664	gtk_button_set_image_position(GTK_BUTTON(m_widget), gtkpos);
	665	InvalidateBestSize();
	666	}
	667	#endif // GTK+ 2.10+
	668	}
	669
	670	#endif // wxUSE_BUTTON