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