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