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
  23 #include "wx/gtk/private.h"
  24
  25 //-----------------------------------------------------------------------------
  26 // classes
  27 //-----------------------------------------------------------------------------
  28
  29 class wxButton;
  30
  31 //-----------------------------------------------------------------------------
  32 // idle system
  33 //-----------------------------------------------------------------------------
  34
  35 extern void wxapp_install_idle_handler();
  36 extern bool g_isIdle;
  37
  38 //-----------------------------------------------------------------------------
  39 // data
  40 //-----------------------------------------------------------------------------
  41
  42 extern bool   g_blockEventsOnDrag;
  43
  44 //-----------------------------------------------------------------------------
  45 // "clicked"
  46 //-----------------------------------------------------------------------------
  47
  48 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  49 {
  50     if (g_isIdle)
  51        wxapp_install_idle_handler();
  52
  53     if (!button->m_hasVMT) return;
  54     if (g_blockEventsOnDrag) return;
  55
  56     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  57     event.SetEventObject(button);
  58     button->GetEventHandler()->ProcessEvent(event);
  59 }
  60
  61 //-----------------------------------------------------------------------------
  62 // wxButton
  63 //-----------------------------------------------------------------------------
  64
  65 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
  66
  67 wxButton::wxButton()
  68 {
  69 }
  70
  71 wxButton::~wxButton()
  72 {
  73 }
  74
  75 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
  76       const wxPoint &pos, const wxSize &size,
  77       long style, const wxValidator& validator, const wxString &name )
  78 {
  79     m_needParent = TRUE;
  80     m_acceptsFocus = TRUE;
  81
  82     if (!PreCreation( parent, pos, size ) ||
  83         !CreateBase( parent, id, pos, size, style, validator, name ))
  84     {
  85         wxFAIL_MSG( wxT("wxButton creation failed") );
  86         return FALSE;
  87     }
  88
  89 /*
  90     wxString label2( label );
  91     for (size_t i = 0; i < label2.Len(); i++)
  92     {
  93         if (label2.GetChar(i) == wxT('&'))
  94         label2.SetChar(i,wxT('_'));
  95     }
  96
  97     GtkWidget *accel_label = gtk_accel_label_new( label2.mb_str() );
  98     gtk_widget_show( accel_label );
  99
 100     m_widget = gtk_button_new();
 101     gtk_container_add( GTK_CONTAINER(m_widget), accel_label );
 102
 103     gtk_accel_label_set_accel_widget( GTK_ACCEL_LABEL(accel_label), m_widget );
 104
 105     guint accel_key = gtk_label_parse_uline (GTK_LABEL(accel_label), label2.mb_str() );
 106     gtk_accel_label_refetch( GTK_ACCEL_LABEL(accel_label) );
 107
 108     wxControl::SetLabel( label );
 109 */
 110
 111 #ifdef __WXGTK20__
 112     if (m_widget == NULL) // may be !=NULL if stock form of Create was used
 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 GTK_CHECK_VERSION(2,4,0)
 131     gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 132 #else
 133     if (GTK_IS_MISC(BUTTON_CHILD(m_widget)))
 134         gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),
 135                                 x_alignment, y_alignment);
 136 #endif
 137
 138     if (!label.empty())
 139         SetLabel(label);
 140
 141     if (style & wxNO_BORDER)
 142        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 143
 144     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 145       GTK_SIGNAL_FUNC(gtk_button_clicked_callback), (gpointer*)this );
 146
 147     m_parent->DoAddChild( this );
 148
 149     PostCreation(size);
 150
 151     return true;
 152 }
 153
 154 bool wxButton::Create(wxWindow *parent, wxWindowID id, wxStockItemID stock,
 155                       const wxString& descriptiveLabel,
 156                       const wxPoint& pos, long style,
 157                       const wxValidator& validator, const wxString& name)
 158 {
 159 #ifdef __WXGTK20__
 160     const char *gtkstock = wxStockItemToGTK(stock);
 161     if (gtkstock)
 162     {
 163         m_widget = gtk_button_new_from_stock(gtkstock);
 164         return Create(parent, id, wxEmptyString,
 165                       pos, wxDefaultSize, style, validator, name);
 166     }
 167     else
 168     {
 169         // not supported by this GTK+ version
 170         return Create(parent, id, wxGetStockItemLabel(stock),
 171                       pos, wxDefaultSize, style, validator, name);
 172     }
 173 #else
 174     return CreateStock(parent, id, stock, descriptiveLabel,
 175                        pos, style, validator, name);
 176 #endif
 177 }
 178
 179 void wxButton::SetDefault()
 180 {
 181     wxWindow *parent = GetParent();
 182     wxCHECK_RET( parent, _T("button without parent?") );
 183
 184     parent->SetDefaultItem(this);
 185
 186     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 187     gtk_widget_grab_default( m_widget );
 188
 189     SetSize( m_x, m_y, m_width, m_height );
 190 }
 191
 192 /* static */
 193 wxSize wxButtonBase::GetDefaultSize()
 194 {
 195 #ifdef __WXGTK20__
 196     static wxSize size = wxDefaultSize;
 197     if (size == wxDefaultSize)
 198     {
 199         // NB: Default size of buttons should be same as size of stock
 200         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 201         //     tricky to obtain this size: stock button's size may be smaller
 202         //     than size of button in GtkButtonBox and vice versa,
 203         //     GtkButtonBox's minimal button size may be smaller than stock
 204         //     button's size. We have to retrieve both values and combine them.
 205
 206         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 207         GtkWidget *box = gtk_hbutton_box_new();
 208         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 209         gtk_container_add(GTK_CONTAINER(box), btn);
 210         gtk_container_add(GTK_CONTAINER(wnd), box);
 211         GtkRequisition req;
 212         gtk_widget_size_request(btn, &req);
 213
 214         gint minwidth, minheight;
 215         gtk_widget_style_get(box,
 216                              "child-min-width", &minwidth,
 217                              "child-min-height", &minheight,
 218                              NULL);
 219
 220         size.x = wxMax(minwidth, req.width);
 221         size.y = wxMax(minheight, req.height);
 222
 223         gtk_widget_destroy(wnd);
 224     }
 225     return size;
 226 #else
 227     return wxSize(80,26);
 228 #endif
 229 }
 230
 231 void wxButton::SetLabel( const wxString &label )
 232 {
 233     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 234
 235     wxControl::SetLabel( label );
 236
 237 #ifdef __WXGTK20__
 238     wxString label2 = PrepareLabelMnemonics( label );
 239     gtk_button_set_label( GTK_BUTTON(m_widget), wxGTK_CONV(label2) );
 240 #else
 241     gtk_label_set( GTK_LABEL( BUTTON_CHILD(m_widget) ), wxGTK_CONV( GetLabel() ) );
 242 #endif
 243 }
 244
 245 bool wxButton::Enable( bool enable )
 246 {
 247     if ( !wxControl::Enable( enable ) )
 248         return FALSE;
 249
 250     gtk_widget_set_sensitive( BUTTON_CHILD(m_widget), enable );
 251
 252     return TRUE;
 253 }
 254
 255 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 256 {
 257 #ifdef __WXGTK20__
 258     return GTK_BUTTON(m_widget)->event_window;
 259 #else
 260     return (window == m_widget->window);
 261 #endif
 262 }
 263
 264 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 265 {
 266     gtk_widget_modify_style(m_widget, style);
 267     gtk_widget_modify_style(BUTTON_CHILD(m_widget), style);
 268 }
 269
 270 wxSize wxButton::DoGetBestSize() const
 271 {
 272     // the default button in wxGTK is bigger than the other ones because of an
 273     // extra border around it, but we don't want to take it into account in
 274     // our size calculations (otherwsie the result is visually ugly), so
 275     // always return the size of non default button from here
 276     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 277     if ( isDefault )
 278     {
 279         // temporarily unset default flag
 280         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 281     }
 282
 283     wxSize ret( wxControl::DoGetBestSize() );
 284
 285     if ( isDefault )
 286     {
 287         // set it back again
 288         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 289     }
 290
 291 #ifndef __WXGTK20__
 292     ret.x += 10;  // add a few pixels for sloppy (but common) themes
 293 #endif
 294
 295     if (!HasFlag(wxBU_EXACTFIT))
 296     {
 297         wxSize defaultSize = GetDefaultSize();
 298         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 299         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 300     }
 301
 302     CacheBestSize(ret);
 303     return ret;
 304 }
 305
 306 // static
 307 wxVisualAttributes
 308 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 309 {
 310     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 311 }
 312
 313 #endif // wxUSE_BUTTON
 314