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
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)

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	IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
	109
	110	bool wxButton::Create(wxWindow *parent,
	111	wxWindowID id,
	112	const wxString &label,
	113	const wxPoint& pos,
	114	const wxSize& size,
	115	long style,
	116	const wxValidator& validator,
	117	const wxString& name)
	118	{
	119	if (!PreCreation( parent, pos, size ) \|\|
	120	!CreateBase( parent, id, pos, size, style, validator, name ))
	121	{
	122	wxFAIL_MSG( wxT("wxButton creation failed") );
	123	return false;
	124	}
	125
	126	// create either a standard button with text label (which may still contain
	127	// an image under GTK+ 2.6+) or a bitmap-only button if we don't have any
	128	// label
	129	const bool
	130	useLabel = !(style & wxBU_NOTEXT) && (!label.empty() \|\| wxIsStockID(id));
	131	if ( useLabel )
	132	{
	133	m_widget = gtk_button_new_with_mnemonic("");
	134	}
	135	else // no label, suppose we will have a bitmap
	136	{
	137	m_widget = gtk_button_new();
	138
	139	GtkWidget *image = gtk_image_new();
	140	gtk_widget_show(image);
	141	gtk_container_add(GTK_CONTAINER(m_widget), image);
	142	}
	143
	144	g_object_ref(m_widget);
	145
	146	float x_alignment = 0.5;
	147	if (HasFlag(wxBU_LEFT))
	148	x_alignment = 0.0;
	149	else if (HasFlag(wxBU_RIGHT))
	150	x_alignment = 1.0;
	151
	152	float y_alignment = 0.5;
	153	if (HasFlag(wxBU_TOP))
	154	y_alignment = 0.0;
	155	else if (HasFlag(wxBU_BOTTOM))
	156	y_alignment = 1.0;
	157
	158	gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
	159
	160	if ( useLabel )
	161	SetLabel(label);
	162
	163	if (style & wxNO_BORDER)
	164	gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
	165
	166	g_signal_connect_after (m_widget, "clicked",
	167	G_CALLBACK (wxgtk_button_clicked_callback),
	168	this);
	169
	170	g_signal_connect_after (m_widget, "style_set",
	171	G_CALLBACK (wxgtk_button_style_set_callback),
	172	this);
	173
	174	m_parent->DoAddChild( this );
	175
	176	PostCreation(size);
	177
	178	return true;
	179	}
	180
	181
	182	wxWindow *wxButton::SetDefault()
	183	{
	184	wxWindow *oldDefault = wxButtonBase::SetDefault();
	185
	186	GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
	187	gtk_widget_grab_default( m_widget );
	188
	189	// resize for default border
	190	wxgtk_button_style_set_callback( m_widget, NULL, this );
	191
	192	return oldDefault;
	193	}
	194
	195	/* static */
	196	wxSize wxButtonBase::GetDefaultSize()
	197	{
	198	static wxSize size = wxDefaultSize;
	199	if (size == wxDefaultSize)
	200	{
	201	// NB: Default size of buttons should be same as size of stock
	202	// buttons as used in most GTK+ apps. Unfortunately it's a little
	203	// tricky to obtain this size: stock button's size may be smaller
	204	// than size of button in GtkButtonBox and vice versa,
	205	// GtkButtonBox's minimal button size may be smaller than stock
	206	// button's size. We have to retrieve both values and combine them.
	207
	208	GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	209	GtkWidget *box = gtk_hbutton_box_new();
	210	GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
	211	gtk_container_add(GTK_CONTAINER(box), btn);
	212	gtk_container_add(GTK_CONTAINER(wnd), box);
	213	GtkRequisition req;
	214	gtk_widget_size_request(btn, &req);
	215
	216	gint minwidth, minheight;
	217	gtk_widget_style_get(box,
	218	"child-min-width", &minwidth,
	219	"child-min-height", &minheight,
	220	NULL);
	221
	222	size.x = wxMax(minwidth, req.width);
	223	size.y = wxMax(minheight, req.height);
	224
	225	gtk_widget_destroy(wnd);
	226	}
	227	return size;
	228	}
	229
	230	void wxButton::SetLabel( const wxString &lbl )
	231	{
	232	wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
	233
	234	wxString label(lbl);
	235
	236	if (label.empty() && wxIsStockID(m_windowId))
	237	label = wxGetStockLabel(m_windowId);
	238
	239	wxControl::SetLabel(label);
	240
	241	// don't use label if it was explicitly disabled
	242	if ( HasFlag(wxBU_NOTEXT) )
	243	return;
	244
	245	if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
	246	{
	247	const char *stock = wxGetStockGtkID(m_windowId);
	248	if (stock)
	249	{
	250	gtk_button_set_label(GTK_BUTTON(m_widget), stock);
	251	gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
	252	return;
	253	}
	254	}
	255
	256	// this call is necessary if the button had been initially created without
	257	// a (text) label -- then we didn't use gtk_button_new_with_mnemonic() and
	258	// so "use-underline" GtkButton property remained unset
	259	gtk_button_set_use_underline(GTK_BUTTON(m_widget), TRUE);
	260	const wxString labelGTK = GTKConvertMnemonics(label);
	261	gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
	262	gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
	263
	264	GTKApplyWidgetStyle( false );
	265	}
	266
	267	bool wxButton::Enable( bool enable )
	268	{
	269	if (!base_type::Enable(enable))
	270	return false;
	271
	272	gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
	273
	274	if (enable)
	275	GTKFixSensitivity();
	276
	277	GTKUpdateBitmap();
	278
	279	return true;
	280	}
	281
	282	GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
	283	{
	284	return GTK_BUTTON(m_widget)->event_window;
	285	}
	286
	287	void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
	288	{
	289	gtk_widget_modify_style(m_widget, style);
	290	GtkWidget *child = GTK_BIN(m_widget)->child;
	291	gtk_widget_modify_style(child, style);
	292
	293	// for buttons with images, the path to the label is (at least in 2.12)
	294	// GtkButton -> GtkAlignment -> GtkHBox -> GtkLabel
	295	if ( GTK_IS_ALIGNMENT(child) )
	296	{
	297	GtkWidget *box = GTK_BIN(child)->child;
	298	if ( GTK_IS_BOX(box) )
	299	{
	300	for (GList* item = GTK_BOX(box)->children; item; item = item->next)
	301	{
	302	GtkBoxChild* boxChild = static_cast<GtkBoxChild*>(item->data);
	303	gtk_widget_modify_style(boxChild->widget, style);
	304	}
	305	}
	306	}
	307	}
	308
	309	wxSize wxButton::DoGetBestSize() const
	310	{
	311	// the default button in wxGTK is bigger than the other ones because of an
	312	// extra border around it, but we don't want to take it into account in
	313	// our size calculations (otherwise the result is visually ugly), so
	314	// always return the size of non default button from here
	315	const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
	316	if ( isDefault )
	317	{
	318	// temporarily unset default flag
	319	GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
	320	}
	321
	322	wxSize ret( wxControl::DoGetBestSize() );
	323
	324	if ( isDefault )
	325	{
	326	// set it back again
	327	GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
	328	}
	329
	330	if (!HasFlag(wxBU_EXACTFIT))
	331	{
	332	wxSize defaultSize = GetDefaultSize();
	333	if (ret.x < defaultSize.x)
	334	ret.x = defaultSize.x;
	335	if (ret.y < defaultSize.y)
	336	ret.y = defaultSize.y;
	337	}
	338
	339	CacheBestSize(ret);
	340	return ret;
	341	}
	342
	343	// static
	344	wxVisualAttributes
	345	wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
	346	{
	347	return GetDefaultAttributesFromGTKWidget(gtk_button_new);
	348	}
	349
	350	// ----------------------------------------------------------------------------
	351	// bitmaps support
	352	// ----------------------------------------------------------------------------
	353
	354	void wxButton::GTKMouseEnters()
	355	{
	356	m_isCurrent = true;
	357
	358	GTKUpdateBitmap();
	359	}
	360
	361	void wxButton::GTKMouseLeaves()
	362	{
	363	m_isCurrent = false;
	364
	365	GTKUpdateBitmap();
	366	}
	367
	368	void wxButton::GTKPressed()
	369	{
	370	m_isPressed = true;
	371
	372	GTKUpdateBitmap();
	373	}
	374
	375	void wxButton::GTKReleased()
	376	{
	377	m_isPressed = false;
	378
	379	GTKUpdateBitmap();
	380	}
	381
	382	void wxButton::GTKOnFocus(wxFocusEvent& event)
	383	{
	384	event.Skip();
	385
	386	GTKUpdateBitmap();
	387	}
	388
	389	wxButton::State wxButton::GTKGetCurrentState() const
	390	{
	391	if ( !IsThisEnabled() )
	392	return m_bitmaps[State_Disabled].IsOk() ? State_Disabled : State_Normal;
	393
	394	if ( m_isPressed && m_bitmaps[State_Pressed].IsOk() )
	395	return State_Pressed;
	396
	397	if ( m_isCurrent && m_bitmaps[State_Current].IsOk() )
	398	return State_Current;
	399
	400	if ( HasFocus() && m_bitmaps[State_Focused].IsOk() )
	401	return State_Focused;
	402
	403	return State_Normal;
	404	}
	405
	406	void wxButton::GTKUpdateBitmap()
	407	{
	408	// if we don't show bitmaps at all, there is nothing to update
	409	if ( m_bitmaps[State_Normal].IsOk() )
	410	{
	411	// if we do show them, this will return a state for which we do have a
	412	// valid bitmap
	413	State state = GTKGetCurrentState();
	414
	415	GTKDoShowBitmap(m_bitmaps[state]);
	416	}
	417	}
	418
	419	void wxButton::GTKDoShowBitmap(const wxBitmap& bitmap)
	420	{
	421	wxASSERT_MSG( bitmap.IsOk(), "invalid bitmap" );
	422
	423	GtkWidget *image;
	424	if ( DontShowLabel() )
	425	{
	426	image = GTK_BIN(m_widget)->child;
	427	}
	428	else // have both label and bitmap
	429	{
	430	#ifdef __WXGTK26__
	431	if ( !gtk_check_version(2,6,0) )
	432	{
	433	image = gtk_button_get_image(GTK_BUTTON(m_widget));
	434	}
	435	else
	436	#endif // __WXGTK26__
	437	{
	438	// buttons with both label and bitmap are only supported with GTK+
	439	// 2.6 so far
	440	//
	441	// it shouldn't be difficult to implement them ourselves for the
	442	// previous GTK+ versions by stuffing a container with a label and
	443	// an image inside GtkButton but there doesn't seem to be much
	444	// point in doing this for ancient GTK+ versions
	445	return;
	446	}
	447	}
	448
	449	wxCHECK_RET( image && GTK_IS_IMAGE(image), "must have image widget" );
	450
	451	gtk_image_set_from_pixbuf(GTK_IMAGE(image), bitmap.GetPixbuf());
	452	}
	453
	454	wxBitmap wxButton::DoGetBitmap(State which) const
	455	{
	456	return m_bitmaps[which];
	457	}
	458
	459	void wxButton::DoSetBitmap(const wxBitmap& bitmap, State which)
	460	{
	461	switch ( which )
	462	{
	463	case State_Normal:
	464	if ( DontShowLabel() )
	465	{
	466	// we only have the bitmap in this button, never remove it but
	467	// do invalidate the best size when the bitmap (and presumably
	468	// its size) changes
	469	InvalidateBestSize();
	470	}
	471	#ifdef __WXGTK26__
	472	// normal image is special: setting it enables images for the button and
	473	// resetting it to nothing disables all of them
	474	else if ( !gtk_check_version(2,6,0) )
	475	{
	476	GtkWidget *image = gtk_button_get_image(GTK_BUTTON(m_widget));
	477	if ( image && !bitmap.IsOk() )
	478	{
	479	gtk_container_remove(GTK_CONTAINER(m_widget), image);
	480	}
	481	else if ( !image && bitmap.IsOk() )
	482	{
	483	image = gtk_image_new();
	484	gtk_button_set_image(GTK_BUTTON(m_widget), image);
	485	}
	486	else // image presence or absence didn't change
	487	{
	488	// don't invalidate best size below
	489	break;
	490	}
	491
	492	InvalidateBestSize();
	493	}
	494	#endif // GTK+ 2.6+
	495	break;
	496
	497	case State_Pressed:
	498	if ( bitmap.IsOk() )
	499	{
	500	if ( !m_bitmaps[which].IsOk() )
	501	{
	502	// we need to install the callbacks to be notified about
	503	// the button pressed state change
	504	g_signal_connect
	505	(
	506	m_widget,
	507	"pressed",
	508	G_CALLBACK(wxgtk_button_press_callback),
	509	this
	510	);
	511
	512	g_signal_connect
	513	(
	514	m_widget,
	515	"released",
	516	G_CALLBACK(wxgtk_button_released_callback),
	517	this
	518	);
	519	}
	520	}
	521	else // no valid bitmap
	522	{
	523	if ( m_bitmaps[which].IsOk() )
	524	{
	525	// we don't need to be notified about the button pressed
	526	// state changes any more
	527	g_signal_handlers_disconnect_by_func
	528	(
	529	m_widget,
	530	(gpointer)wxgtk_button_press_callback,
	531	this
	532	);
	533
	534	g_signal_handlers_disconnect_by_func
	535	(
	536	m_widget,
	537	(gpointer)wxgtk_button_released_callback,
	538	this
	539	);
	540
	541	// also make sure we don't remain stuck in pressed state
	542	if ( m_isPressed )
	543	{
	544	m_isPressed = false;
	545	GTKUpdateBitmap();
	546	}
	547	}
	548	}
	549	break;
	550
	551	case State_Current:
	552	// the logic here is the same as above for State_Pressed: we need
	553	// to connect the handlers if we must be notified about the changes
	554	// in the button current state and we disconnect them when/if we
	555	// don't need them any more
	556	if ( bitmap.IsOk() )
	557	{
	558	if ( !m_bitmaps[which].IsOk() )
	559	{
	560	g_signal_connect
	561	(
	562	m_widget,
	563	"enter",
	564	G_CALLBACK(wxgtk_button_enter_callback),
	565	this
	566	);
	567
	568	g_signal_connect
	569	(
	570	m_widget,
	571	"leave",
	572	G_CALLBACK(wxgtk_button_leave_callback),
	573	this
	574	);
	575	}
	576	}
	577	else // no valid bitmap
	578	{
	579	if ( m_bitmaps[which].IsOk() )
	580	{
	581	g_signal_handlers_disconnect_by_func
	582	(
	583	m_widget,
	584	(gpointer)wxgtk_button_enter_callback,
	585	this
	586	);
	587
	588	g_signal_handlers_disconnect_by_func
	589	(
	590	m_widget,
	591	(gpointer)wxgtk_button_leave_callback,
	592	this
	593	);
	594
	595	if ( m_isCurrent )
	596	{
	597	m_isCurrent = false;
	598	GTKUpdateBitmap();
	599	}
	600	}
	601	}
	602	break;
	603
	604	case State_Focused:
	605	if ( bitmap.IsOk() )
	606	{
	607	Connect(wxEVT_SET_FOCUS,
	608	wxFocusEventHandler(wxButton::GTKOnFocus));
	609	Connect(wxEVT_KILL_FOCUS,
	610	wxFocusEventHandler(wxButton::GTKOnFocus));
	611	}
	612	else // no valid focused bitmap
	613	{
	614	Disconnect(wxEVT_SET_FOCUS,
	615	wxFocusEventHandler(wxButton::GTKOnFocus));
	616	Disconnect(wxEVT_KILL_FOCUS,
	617	wxFocusEventHandler(wxButton::GTKOnFocus));
	618	}
	619	break;
	620
	621	default:
	622	// no callbacks to connect/disconnect
	623	;
	624	}
	625
	626	m_bitmaps[which] = bitmap;
	627
	628	// update the bitmap immediately if necessary, otherwise it will be done
	629	// when the bitmap for the corresponding state is needed the next time by
	630	// GTKUpdateBitmap()
	631	if ( bitmap.IsOk() && which == GTKGetCurrentState() )
	632	{
	633	GTKDoShowBitmap(bitmap);
	634	}
	635	}
	636
	637	void wxButton::DoSetBitmapPosition(wxDirection dir)
	638	{
	639	#ifdef __WXGTK210__
	640	if ( !gtk_check_version(2,10,0) )
	641	{
	642	GtkPositionType gtkpos;
	643	switch ( dir )
	644	{
	645	default:
	646	wxFAIL_MSG( "invalid position" );
	647	// fall through
	648
	649	case wxLEFT:
	650	gtkpos = GTK_POS_LEFT;
	651	break;
	652
	653	case wxRIGHT:
	654	gtkpos = GTK_POS_RIGHT;
	655	break;
	656
	657	case wxTOP:
	658	gtkpos = GTK_POS_TOP;
	659	break;
	660
	661	case wxBOTTOM:
	662	gtkpos = GTK_POS_BOTTOM;
	663	break;
	664	}
	665
	666	gtk_button_set_image_position(GTK_BUTTON(m_widget), gtkpos);
	667	InvalidateBestSize();
	668	}
	669	#endif // GTK+ 2.10+
	670	}
	671
	672	#endif // wxUSE_BUTTON