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             g_free( default_border );
  75         }
  76         win->MoveWindow(
  77             win->m_x - top_border,
  78             win->m_y - left_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, wxWindowID id, const wxString &label,
 101       const wxPoint &pos, const wxSize &size,
 102       long style, const wxValidator& validator, const wxString &name )
 103 {
 104     m_needParent = true;
 105
 106     if (!PreCreation( parent, pos, size ) ||
 107         !CreateBase( parent, id, pos, size, style, validator, name ))
 108     {
 109         wxFAIL_MSG( wxT("wxButton creation failed") );
 110         return false;
 111     }
 112
 113     m_widget = gtk_button_new_with_mnemonic("");
 114
 115     float x_alignment = 0.5;
 116     if (HasFlag(wxBU_LEFT))
 117         x_alignment = 0.0;
 118     else if (HasFlag(wxBU_RIGHT))
 119         x_alignment = 1.0;
 120
 121     float y_alignment = 0.5;
 122     if (HasFlag(wxBU_TOP))
 123         y_alignment = 0.0;
 124     else if (HasFlag(wxBU_BOTTOM))
 125         y_alignment = 1.0;
 126
 127 #ifdef __WXGTK24__
 128     if (!gtk_check_version(2,4,0))
 129     {
 130         gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 131     }
 132     else
 133 #endif
 134     {
 135         if (GTK_IS_MISC(GTK_BIN(m_widget)->child))
 136             gtk_misc_set_alignment(GTK_MISC(GTK_BIN(m_widget)->child),
 137                                 x_alignment, y_alignment);
 138     }
 139
 140     SetLabel(label);
 141
 142     if (style & wxNO_BORDER)
 143        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 144
 145     g_signal_connect_after (m_widget, "clicked",
 146                             G_CALLBACK (gtk_button_clicked_callback),
 147                             this);
 148
 149     g_signal_connect_after (m_widget, "style_set",
 150                             G_CALLBACK (gtk_button_style_set_callback),
 151                             this);
 152
 153     m_parent->DoAddChild( this );
 154
 155     PostCreation(size);
 156
 157     return true;
 158 }
 159
 160
 161 wxWindow *wxButton::SetDefault()
 162 {
 163     wxWindow *oldDefault = wxButtonBase::SetDefault();
 164
 165     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 166     gtk_widget_grab_default( m_widget );
 167
 168     // resize for default border
 169     gtk_button_style_set_callback( m_widget, NULL, this );
 170
 171     return oldDefault;
 172 }
 173
 174 /* static */
 175 wxSize wxButtonBase::GetDefaultSize()
 176 {
 177     static wxSize size = wxDefaultSize;
 178     if (size == wxDefaultSize)
 179     {
 180         // NB: Default size of buttons should be same as size of stock
 181         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 182         //     tricky to obtain this size: stock button's size may be smaller
 183         //     than size of button in GtkButtonBox and vice versa,
 184         //     GtkButtonBox's minimal button size may be smaller than stock
 185         //     button's size. We have to retrieve both values and combine them.
 186
 187         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 188         GtkWidget *box = gtk_hbutton_box_new();
 189         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 190         gtk_container_add(GTK_CONTAINER(box), btn);
 191         gtk_container_add(GTK_CONTAINER(wnd), box);
 192         GtkRequisition req;
 193         gtk_widget_size_request(btn, &req);
 194
 195         gint minwidth, minheight;
 196         gtk_widget_style_get(box,
 197                              "child-min-width", &minwidth,
 198                              "child-min-height", &minheight,
 199                              NULL);
 200
 201         size.x = wxMax(minwidth, req.width);
 202         size.y = wxMax(minheight, req.height);
 203
 204         gtk_widget_destroy(wnd);
 205     }
 206     return size;
 207 }
 208
 209 void wxButton::SetLabel( const wxString &lbl )
 210 {
 211     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 212
 213     wxString label(lbl);
 214
 215     if (label.empty() && wxIsStockID(m_windowId))
 216         label = wxGetStockLabel(m_windowId);
 217
 218     wxControl::SetLabel(label);
 219
 220     const wxString labelGTK = GTKConvertMnemonics(label);
 221
 222     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 223     {
 224         const char *stock = wxGetStockGtkID(m_windowId);
 225         if (stock)
 226         {
 227             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 228             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 229             return;
 230         }
 231     }
 232
 233     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 234     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 235
 236     ApplyWidgetStyle( false );
 237 }
 238
 239 bool wxButton::Enable( bool enable )
 240 {
 241     if ( !wxControl::Enable( enable ) )
 242         return false;
 243
 244     gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
 245
 246     return true;
 247 }
 248
 249 GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 250 {
 251     return GTK_BUTTON(m_widget)->event_window;
 252 }
 253
 254 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 255 {
 256     gtk_widget_modify_style(m_widget, style);
 257     gtk_widget_modify_style(GTK_BIN(m_widget)->child, style);
 258 }
 259
 260 wxSize wxButton::DoGetBestSize() const
 261 {
 262     // the default button in wxGTK is bigger than the other ones because of an
 263     // extra border around it, but we don't want to take it into account in
 264     // our size calculations (otherwsie the result is visually ugly), so
 265     // always return the size of non default button from here
 266     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 267     if ( isDefault )
 268     {
 269         // temporarily unset default flag
 270         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 271     }
 272
 273     wxSize ret( wxControl::DoGetBestSize() );
 274
 275     if ( isDefault )
 276     {
 277         // set it back again
 278         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 279     }
 280
 281     if (!HasFlag(wxBU_EXACTFIT))
 282     {
 283         wxSize defaultSize = GetDefaultSize();
 284         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 285         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 286     }
 287
 288     CacheBestSize(ret);
 289     return ret;
 290 }
 291
 292 // static
 293 wxVisualAttributes
 294 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 295 {
 296     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 297 }
 298
 299 #endif // wxUSE_BUTTON