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