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->HandleWindowEvent(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     gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 131
 132     SetLabel(label);
 133
 134     if (style & wxNO_BORDER)
 135        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 136
 137     g_signal_connect_after (m_widget, "clicked",
 138                             G_CALLBACK (gtk_button_clicked_callback),
 139                             this);
 140
 141     g_signal_connect_after (m_widget, "style_set",
 142                             G_CALLBACK (gtk_button_style_set_callback),
 143                             this);
 144
 145     m_parent->DoAddChild( this );
 146
 147     PostCreation(size);
 148
 149     return true;
 150 }
 151
 152
 153 wxWindow *wxButton::SetDefault()
 154 {
 155     wxWindow *oldDefault = wxButtonBase::SetDefault();
 156
 157     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 158     gtk_widget_grab_default( m_widget );
 159
 160     // resize for default border
 161     gtk_button_style_set_callback( m_widget, NULL, this );
 162
 163     return oldDefault;
 164 }
 165
 166 /* static */
 167 wxSize wxButtonBase::GetDefaultSize()
 168 {
 169     static wxSize size = wxDefaultSize;
 170     if (size == wxDefaultSize)
 171     {
 172         // NB: Default size of buttons should be same as size of stock
 173         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 174         //     tricky to obtain this size: stock button's size may be smaller
 175         //     than size of button in GtkButtonBox and vice versa,
 176         //     GtkButtonBox's minimal button size may be smaller than stock
 177         //     button's size. We have to retrieve both values and combine them.
 178
 179         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 180         GtkWidget *box = gtk_hbutton_box_new();
 181         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 182         gtk_container_add(GTK_CONTAINER(box), btn);
 183         gtk_container_add(GTK_CONTAINER(wnd), box);
 184         GtkRequisition req;
 185         gtk_widget_size_request(btn, &req);
 186
 187         gint minwidth, minheight;
 188         gtk_widget_style_get(box,
 189                              "child-min-width", &minwidth,
 190                              "child-min-height", &minheight,
 191                              NULL);
 192
 193         size.x = wxMax(minwidth, req.width);
 194         size.y = wxMax(minheight, req.height);
 195
 196         gtk_widget_destroy(wnd);
 197     }
 198     return size;
 199 }
 200
 201 void wxButton::SetLabel( const wxString &lbl )
 202 {
 203     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 204
 205     wxString label(lbl);
 206
 207     if (label.empty() && wxIsStockID(m_windowId))
 208         label = wxGetStockLabel(m_windowId);
 209
 210     wxControl::SetLabel(label);
 211
 212     const wxString labelGTK = GTKConvertMnemonics(label);
 213
 214     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 215     {
 216         const char *stock = wxGetStockGtkID(m_windowId);
 217         if (stock)
 218         {
 219             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 220             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 221             return;
 222         }
 223     }
 224
 225     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 226     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 227
 228     ApplyWidgetStyle( false );
 229 }
 230
 231 bool wxButton::Enable( bool enable )
 232 {
 233     if ( !wxControl::Enable( enable ) )
 234         return false;
 235
 236     gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
 237
 238     return true;
 239 }
 240
 241 GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 242 {
 243     return GTK_BUTTON(m_widget)->event_window;
 244 }
 245
 246 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 247 {
 248     gtk_widget_modify_style(m_widget, style);
 249     GtkWidget *child = GTK_BIN(m_widget)->child;
 250     gtk_widget_modify_style(child, style);
 251
 252     // for buttons with images, the path to the label is (at least in 2.12)
 253     // GtkButton -> GtkAlignment -> GtkHBox -> GtkLabel
 254     if ( GTK_IS_ALIGNMENT(child) )
 255     {
 256         GtkWidget *box = GTK_BIN(child)->child;
 257         if ( GTK_IS_BOX(box) )
 258         {
 259             GList *items = gtk_container_get_children(GTK_CONTAINER(box));
 260             for ( GList *item = items; item; item = item->next )
 261                 gtk_widget_modify_style(GTK_WIDGET(item->data), style);
 262         }
 263     }
 264 }
 265
 266 wxSize wxButton::DoGetBestSize() const
 267 {
 268     // the default button in wxGTK is bigger than the other ones because of an
 269     // extra border around it, but we don't want to take it into account in
 270     // our size calculations (otherwsie the result is visually ugly), so
 271     // always return the size of non default button from here
 272     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 273     if ( isDefault )
 274     {
 275         // temporarily unset default flag
 276         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 277     }
 278
 279     wxSize ret( wxControl::DoGetBestSize() );
 280
 281     if ( isDefault )
 282     {
 283         // set it back again
 284         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 285     }
 286
 287     if (!HasFlag(wxBU_EXACTFIT))
 288     {
 289         wxSize defaultSize = GetDefaultSize();
 290         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 291         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 292     }
 293
 294     CacheBestSize(ret);
 295     return ret;
 296 }
 297
 298 // static
 299 wxVisualAttributes
 300 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 301 {
 302     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 303 }
 304
 305 #endif // wxUSE_BUTTON