src/gtk/button.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/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 #if wxUSE_BUTTON
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/button.h"
  17 #endif
  18
  19 #include "wx/stockitem.h"
  20
  21 #include "wx/gtk/private.h"
  22
  23 //-----------------------------------------------------------------------------
  24 // classes
  25 //-----------------------------------------------------------------------------
  26
  27 class wxButton;
  28
  29 //-----------------------------------------------------------------------------
  30 // data
  31 //-----------------------------------------------------------------------------
  32
  33 extern bool   g_blockEventsOnDrag;
  34
  35 //-----------------------------------------------------------------------------
  36 // "clicked"
  37 //-----------------------------------------------------------------------------
  38
  39 extern "C" {
  40 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  41 {
  42     if (!button->m_hasVMT) return;
  43     if (g_blockEventsOnDrag) return;
  44
  45     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  46     event.SetEventObject(button);
  47     button->GetEventHandler()->ProcessEvent(event);
  48 }
  49 }
  50
  51 //-----------------------------------------------------------------------------
  52 // "style_set" from m_widget
  53 //-----------------------------------------------------------------------------
  54
  55 static gint
  56 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
  57 {
  58     int left_border = 0;
  59     int right_border = 0;
  60     int top_border = 0;
  61     int bottom_border = 0;
  62
  63     /* the default button has a border around it */
  64     if (GTK_WIDGET_CAN_DEFAULT(m_widget))
  65     {
  66         GtkBorder *default_border = NULL;
  67         gtk_widget_style_get( m_widget, "default_border", &default_border, NULL );
  68         if (default_border)
  69         {
  70             left_border += default_border->left;
  71             right_border += default_border->right;
  72             top_border += default_border->top;
  73             bottom_border += default_border->bottom;
  74             gtk_border_free( default_border );
  75         }
  76         win->MoveWindow(
  77             win->m_x - left_border,
  78             win->m_y - top_border,
  79             win->m_width + left_border + right_border,
  80             win->m_height + top_border + bottom_border);
  81     }
  82
  83     return FALSE;
  84 }
  85
  86 //-----------------------------------------------------------------------------
  87 // wxButton
  88 //-----------------------------------------------------------------------------
  89
  90 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
  91
  92 wxButton::wxButton()
  93 {
  94 }
  95
  96 wxButton::~wxButton()
  97 {
  98 }
  99
 100 bool wxButton::Create(wxWindow *parent,
 101                       wxWindowID id,
 102                       const wxString &label,
 103                       const wxPoint& pos,
 104                       const wxSize& size,
 105                       long style,
 106                       const wxValidator& validator,
 107                       const wxString& name)
 108 {
 109     if (!PreCreation( parent, pos, size ) ||
 110         !CreateBase( parent, id, pos, size, style, validator, name ))
 111     {
 112         wxFAIL_MSG( wxT("wxButton creation failed") );
 113         return false;
 114     }
 115
 116     m_widget = gtk_button_new_with_mnemonic("");
 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 #ifdef __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(GTK_BIN(m_widget)->child))
 139             gtk_misc_set_alignment(GTK_MISC(GTK_BIN(m_widget)->child),
 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     g_signal_connect_after (m_widget, "clicked",
 149                             G_CALLBACK (gtk_button_clicked_callback),
 150                             this);
 151
 152     g_signal_connect_after (m_widget, "style_set",
 153                             G_CALLBACK (gtk_button_style_set_callback),
 154                             this);
 155
 156     m_parent->DoAddChild( this );
 157
 158     PostCreation(size);
 159
 160     return true;
 161 }
 162
 163
 164 wxWindow *wxButton::SetDefault()
 165 {
 166     wxWindow *oldDefault = wxButtonBase::SetDefault();
 167
 168     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 169     gtk_widget_grab_default( m_widget );
 170
 171     // resize for default border
 172     gtk_button_style_set_callback( m_widget, NULL, this );
 173
 174     return oldDefault;
 175 }
 176
 177 /* static */
 178 wxSize wxButtonBase::GetDefaultSize()
 179 {
 180     static wxSize size = wxDefaultSize;
 181     if (size == wxDefaultSize)
 182     {
 183         // NB: Default size of buttons should be same as size of stock
 184         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 185         //     tricky to obtain this size: stock button's size may be smaller
 186         //     than size of button in GtkButtonBox and vice versa,
 187         //     GtkButtonBox's minimal button size may be smaller than stock
 188         //     button's size. We have to retrieve both values and combine them.
 189
 190         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 191         GtkWidget *box = gtk_hbutton_box_new();
 192         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 193         gtk_container_add(GTK_CONTAINER(box), btn);
 194         gtk_container_add(GTK_CONTAINER(wnd), box);
 195         GtkRequisition req;
 196         gtk_widget_size_request(btn, &req);
 197
 198         gint minwidth, minheight;
 199         gtk_widget_style_get(box,
 200                              "child-min-width", &minwidth,
 201                              "child-min-height", &minheight,
 202                              NULL);
 203
 204         size.x = wxMax(minwidth, req.width);
 205         size.y = wxMax(minheight, req.height);
 206
 207         gtk_widget_destroy(wnd);
 208     }
 209     return size;
 210 }
 211
 212 void wxButton::SetLabel( const wxString &lbl )
 213 {
 214     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 215
 216     wxString label(lbl);
 217
 218     if (label.empty() && wxIsStockID(m_windowId))
 219         label = wxGetStockLabel(m_windowId);
 220
 221     wxControl::SetLabel(label);
 222
 223     const wxString labelGTK = GTKConvertMnemonics(label);
 224
 225     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 226     {
 227         const char *stock = wxGetStockGtkID(m_windowId);
 228         if (stock)
 229         {
 230             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 231             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 232             return;
 233         }
 234     }
 235
 236     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 237     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 238
 239     ApplyWidgetStyle( false );
 240 }
 241
 242 bool wxButton::Enable( bool enable )
 243 {
 244     if ( !wxControl::Enable( enable ) )
 245         return false;
 246
 247     gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
 248
 249     return true;
 250 }
 251
 252 GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 253 {
 254     return GTK_BUTTON(m_widget)->event_window;
 255 }
 256
 257 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 258 {
 259     gtk_widget_modify_style(m_widget, style);
 260     gtk_widget_modify_style(GTK_BIN(m_widget)->child, style);
 261 }
 262
 263 wxSize wxButton::DoGetBestSize() const
 264 {
 265     // the default button in wxGTK is bigger than the other ones because of an
 266     // extra border around it, but we don't want to take it into account in
 267     // our size calculations (otherwsie the result is visually ugly), so
 268     // always return the size of non default button from here
 269     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 270     if ( isDefault )
 271     {
 272         // temporarily unset default flag
 273         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 274     }
 275
 276     wxSize ret( wxControl::DoGetBestSize() );
 277
 278     if ( isDefault )
 279     {
 280         // set it back again
 281         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 282     }
 283
 284     if (!HasFlag(wxBU_EXACTFIT))
 285     {
 286         wxSize defaultSize = GetDefaultSize();
 287         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 288         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 289     }
 290
 291     CacheBestSize(ret);
 292     return ret;
 293 }
 294
 295 // static
 296 wxVisualAttributes
 297 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 298 {
 299     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 300 }
 301
 302 #endif // wxUSE_BUTTON