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