src/gtk/button.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        button.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "button.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/defs.h"
  18
  19 #if wxUSE_BUTTON
  20
  21 #include "wx/button.h"
  22 #include "wx/stockitem.h"
  23
  24 #include "wx/gtk/private.h"
  25 #include "wx/gtk/win_gtk.h"
  26
  27 //-----------------------------------------------------------------------------
  28 // classes
  29 //-----------------------------------------------------------------------------
  30
  31 class wxButton;
  32
  33 //-----------------------------------------------------------------------------
  34 // idle system
  35 //-----------------------------------------------------------------------------
  36
  37 extern void wxapp_install_idle_handler();
  38 extern bool g_isIdle;
  39
  40 //-----------------------------------------------------------------------------
  41 // data
  42 //-----------------------------------------------------------------------------
  43
  44 extern bool   g_blockEventsOnDrag;
  45
  46 //-----------------------------------------------------------------------------
  47 // "clicked"
  48 //-----------------------------------------------------------------------------
  49
  50 extern "C" {
  51 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  52 {
  53     if (g_isIdle)
  54        wxapp_install_idle_handler();
  55
  56     if (!button->m_hasVMT) return;
  57     if (g_blockEventsOnDrag) return;
  58
  59     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  60     event.SetEventObject(button);
  61     button->GetEventHandler()->ProcessEvent(event);
  62 }
  63 }
  64
  65 //-----------------------------------------------------------------------------
  66 // "style_set" from m_widget
  67 //-----------------------------------------------------------------------------
  68
  69 static gint
  70 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
  71 {
  72     if (g_isIdle)
  73         wxapp_install_idle_handler();
  74
  75     int left_border = 0;
  76     int right_border = 0;
  77     int top_border = 0;
  78     int bottom_border = 0;
  79
  80     /* the default button has a border around it */
  81     if (GTK_WIDGET_CAN_DEFAULT(m_widget))
  82     {
  83 #ifdef __WXGTK20__
  84         GtkBorder *default_border = NULL;
  85         gtk_widget_style_get( m_widget, "default_border", &default_border, NULL );
  86         if (default_border)
  87         {
  88             left_border += default_border->left;
  89             right_border += default_border->right;
  90             top_border += default_border->top;
  91             bottom_border += default_border->bottom;
  92             g_free( default_border );
  93         }
  94 #else
  95         left_border = 6;
  96         right_border = 6;
  97         top_border = 6;
  98         bottom_border = 5;
  99 #endif
 100         win->DoMoveWindow( win->m_x-top_border,
 101                            win->m_y-left_border,
 102                            win->m_width+left_border+right_border,
 103                            win->m_height+top_border+bottom_border );
 104     }
 105
 106     return FALSE;
 107 }
 108
 109 //-----------------------------------------------------------------------------
 110 // wxButton
 111 //-----------------------------------------------------------------------------
 112
 113 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
 114
 115 wxButton::wxButton()
 116 {
 117 }
 118
 119 wxButton::~wxButton()
 120 {
 121 }
 122
 123 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 124       const wxPoint &pos, const wxSize &size,
 125       long style, const wxValidator& validator, const wxString &name )
 126 {
 127     m_needParent = TRUE;
 128     m_acceptsFocus = TRUE;
 129
 130     if (!PreCreation( parent, pos, size ) ||
 131         !CreateBase( parent, id, pos, size, style, validator, name ))
 132     {
 133         wxFAIL_MSG( wxT("wxButton creation failed") );
 134         return FALSE;
 135     }
 136
 137 /*
 138     wxString label2( label );
 139     for (size_t i = 0; i < label2.Len(); i++)
 140     {
 141         if (label2.GetChar(i) == wxT('&'))
 142         label2.SetChar(i,wxT('_'));
 143     }
 144
 145     GtkWidget *accel_label = gtk_accel_label_new( label2.mb_str() );
 146     gtk_widget_show( accel_label );
 147
 148     m_widget = gtk_button_new();
 149     gtk_container_add( GTK_CONTAINER(m_widget), accel_label );
 150
 151     gtk_accel_label_set_accel_widget( GTK_ACCEL_LABEL(accel_label), m_widget );
 152
 153     guint accel_key = gtk_label_parse_uline (GTK_LABEL(accel_label), label2.mb_str() );
 154     gtk_accel_label_refetch( GTK_ACCEL_LABEL(accel_label) );
 155
 156     wxControl::SetLabel( label );
 157 */
 158
 159 #ifdef __WXGTK20__
 160     m_widget = gtk_button_new_with_mnemonic("");
 161 #else
 162     m_widget = gtk_button_new_with_label("");
 163 #endif
 164
 165     float x_alignment = 0.5;
 166     if (HasFlag(wxBU_LEFT))
 167         x_alignment = 0.0;
 168     else if (HasFlag(wxBU_RIGHT))
 169         x_alignment = 1.0;
 170
 171     float y_alignment = 0.5;
 172     if (HasFlag(wxBU_TOP))
 173         y_alignment = 0.0;
 174     else if (HasFlag(wxBU_BOTTOM))
 175         y_alignment = 1.0;
 176
 177 #if __WXGTK24__
 178     if (!gtk_check_version(2,4,0))
 179     {
 180         gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 181     }
 182     else
 183 #endif
 184     {
 185         if (GTK_IS_MISC(BUTTON_CHILD(m_widget)))
 186             gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),
 187                                 x_alignment, y_alignment);
 188     }
 189
 190     SetLabel(label);
 191
 192     if (style & wxNO_BORDER)
 193        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 194
 195     gtk_signal_connect_after( GTK_OBJECT(m_widget), "clicked",
 196       GTK_SIGNAL_FUNC(gtk_button_clicked_callback), (gpointer*)this );
 197
 198     gtk_signal_connect_after( GTK_OBJECT(m_widget), "style_set",
 199       GTK_SIGNAL_FUNC(gtk_button_style_set_callback), (gpointer*) this );
 200
 201     m_parent->DoAddChild( this );
 202
 203     PostCreation(size);
 204
 205     return true;
 206 }
 207
 208
 209 void wxButton::SetDefault()
 210 {
 211     wxWindow *parent = GetParent();
 212     wxCHECK_RET( parent, _T("button without parent?") );
 213
 214     parent->SetDefaultItem(this);
 215
 216     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 217     gtk_widget_grab_default( m_widget );
 218
 219     // resize for default border
 220     gtk_button_style_set_callback( m_widget, NULL, this );
 221 }
 222
 223 /* static */
 224 wxSize wxButtonBase::GetDefaultSize()
 225 {
 226 #ifdef __WXGTK20__
 227     static wxSize size = wxDefaultSize;
 228     if (size == wxDefaultSize)
 229     {
 230         // NB: Default size of buttons should be same as size of stock
 231         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 232         //     tricky to obtain this size: stock button's size may be smaller
 233         //     than size of button in GtkButtonBox and vice versa,
 234         //     GtkButtonBox's minimal button size may be smaller than stock
 235         //     button's size. We have to retrieve both values and combine them.
 236
 237         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 238         GtkWidget *box = gtk_hbutton_box_new();
 239         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 240         gtk_container_add(GTK_CONTAINER(box), btn);
 241         gtk_container_add(GTK_CONTAINER(wnd), box);
 242         GtkRequisition req;
 243         gtk_widget_size_request(btn, &req);
 244
 245         gint minwidth, minheight;
 246         gtk_widget_style_get(box,
 247                              "child-min-width", &minwidth,
 248                              "child-min-height", &minheight,
 249                              NULL);
 250
 251         size.x = wxMax(minwidth, req.width);
 252         size.y = wxMax(minheight, req.height);
 253
 254         gtk_widget_destroy(wnd);
 255     }
 256     return size;
 257 #else
 258     return wxSize(80,26);
 259 #endif
 260 }
 261
 262 void wxButton::SetLabel( const wxString &lbl )
 263 {
 264     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 265
 266     wxString label(lbl);
 267
 268     if (label.empty() && wxIsStockID(m_windowId))
 269         label = wxGetStockLabel(m_windowId);
 270
 271     wxControl::SetLabel(label);
 272
 273 #ifdef __WXGTK20__
 274     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 275     {
 276         const char *stock = wxGetStockGtkID(m_windowId);
 277         if (stock)
 278         {
 279             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 280             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 281             return;
 282         }
 283     }
 284
 285     wxString label2 = PrepareLabelMnemonics(label);
 286     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(label2));
 287     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 288
 289     ApplyWidgetStyle( false );
 290
 291 #else
 292     gtk_label_set(GTK_LABEL(BUTTON_CHILD(m_widget)), wxGTK_CONV(GetLabel()));
 293 #endif
 294 }
 295
 296 bool wxButton::Enable( bool enable )
 297 {
 298     if ( !wxControl::Enable( enable ) )
 299         return FALSE;
 300
 301     gtk_widget_set_sensitive( BUTTON_CHILD(m_widget), enable );
 302
 303     return TRUE;
 304 }
 305
 306 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 307 {
 308 #ifdef __WXGTK20__
 309     return GTK_BUTTON(m_widget)->event_window;
 310 #else
 311     return (window == m_widget->window);
 312 #endif
 313 }
 314
 315 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 316 {
 317     gtk_widget_modify_style(m_widget, style);
 318     gtk_widget_modify_style(BUTTON_CHILD(m_widget), style);
 319 }
 320
 321 wxSize wxButton::DoGetBestSize() const
 322 {
 323     // the default button in wxGTK is bigger than the other ones because of an
 324     // extra border around it, but we don't want to take it into account in
 325     // our size calculations (otherwsie the result is visually ugly), so
 326     // always return the size of non default button from here
 327     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 328     if ( isDefault )
 329     {
 330         // temporarily unset default flag
 331         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 332     }
 333
 334     wxSize ret( wxControl::DoGetBestSize() );
 335
 336     if ( isDefault )
 337     {
 338         // set it back again
 339         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 340     }
 341
 342 #ifndef __WXGTK20__
 343     ret.x += 10;  // add a few pixels for sloppy (but common) themes
 344 #endif
 345
 346     if (!HasFlag(wxBU_EXACTFIT))
 347     {
 348         wxSize defaultSize = GetDefaultSize();
 349         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 350         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 351     }
 352
 353     CacheBestSize(ret);
 354     return ret;
 355 }
 356
 357 // static
 358 wxVisualAttributes
 359 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 360 {
 361     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 362 }
 363
 364 #endif // wxUSE_BUTTON
 365