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 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/defs.h"
  14
  15 #if wxUSE_BUTTON
  16
  17 #include "wx/button.h"
  18 #include "wx/stockitem.h"
  19
  20 #include "wx/gtk/private.h"
  21 #include "wx/gtk/win_gtk.h"
  22
  23 //-----------------------------------------------------------------------------
  24 // classes
  25 //-----------------------------------------------------------------------------
  26
  27 class wxButton;
  28
  29 //-----------------------------------------------------------------------------
  30 // idle system
  31 //-----------------------------------------------------------------------------
  32
  33 extern void wxapp_install_idle_handler();
  34 extern bool g_isIdle;
  35
  36 //-----------------------------------------------------------------------------
  37 // data
  38 //-----------------------------------------------------------------------------
  39
  40 extern bool   g_blockEventsOnDrag;
  41
  42 //-----------------------------------------------------------------------------
  43 // "clicked"
  44 //-----------------------------------------------------------------------------
  45
  46 extern "C" {
  47 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  48 {
  49     if (g_isIdle)
  50        wxapp_install_idle_handler();
  51
  52     if (!button->m_hasVMT) return;
  53     if (g_blockEventsOnDrag) return;
  54
  55     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  56     event.SetEventObject(button);
  57     button->GetEventHandler()->ProcessEvent(event);
  58 }
  59 }
  60
  61 //-----------------------------------------------------------------------------
  62 // "style_set" from m_widget
  63 //-----------------------------------------------------------------------------
  64
  65 static gint
  66 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
  67 {
  68     if (g_isIdle)
  69         wxapp_install_idle_handler();
  70
  71     int left_border = 0;
  72     int right_border = 0;
  73     int top_border = 0;
  74     int bottom_border = 0;
  75
  76     /* the default button has a border around it */
  77     if (GTK_WIDGET_CAN_DEFAULT(m_widget))
  78     {
  79         GtkBorder *default_border = NULL;
  80         gtk_widget_style_get( m_widget, "default_border", &default_border, NULL );
  81         if (default_border)
  82         {
  83             left_border += default_border->left;
  84             right_border += default_border->right;
  85             top_border += default_border->top;
  86             bottom_border += default_border->bottom;
  87             g_free( default_border );
  88         }
  89         win->DoMoveWindow( win->m_x-top_border,
  90                            win->m_y-left_border,
  91                            win->m_width+left_border+right_border,
  92                            win->m_height+top_border+bottom_border );
  93     }
  94
  95     return FALSE;
  96 }
  97
  98 //-----------------------------------------------------------------------------
  99 // wxButton
 100 //-----------------------------------------------------------------------------
 101
 102 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
 103
 104 wxButton::wxButton()
 105 {
 106 }
 107
 108 wxButton::~wxButton()
 109 {
 110 }
 111
 112 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 113       const wxPoint &pos, const wxSize &size,
 114       long style, const wxValidator& validator, const wxString &name )
 115 {
 116     m_needParent = TRUE;
 117     m_acceptsFocus = TRUE;
 118
 119     if (!PreCreation( parent, pos, size ) ||
 120         !CreateBase( parent, id, pos, size, style, validator, name ))
 121     {
 122         wxFAIL_MSG( wxT("wxButton creation failed") );
 123         return FALSE;
 124     }
 125
 126     m_widget = gtk_button_new_with_mnemonic("");
 127
 128     float x_alignment = 0.5;
 129     if (HasFlag(wxBU_LEFT))
 130         x_alignment = 0.0;
 131     else if (HasFlag(wxBU_RIGHT))
 132         x_alignment = 1.0;
 133
 134     float y_alignment = 0.5;
 135     if (HasFlag(wxBU_TOP))
 136         y_alignment = 0.0;
 137     else if (HasFlag(wxBU_BOTTOM))
 138         y_alignment = 1.0;
 139
 140 #ifdef __WXGTK24__
 141     if (!gtk_check_version(2,4,0))
 142     {
 143         gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 144     }
 145     else
 146 #endif
 147     {
 148         if (GTK_IS_MISC(BUTTON_CHILD(m_widget)))
 149             gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),
 150                                 x_alignment, y_alignment);
 151     }
 152
 153     SetLabel(label);
 154
 155     if (style & wxNO_BORDER)
 156        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 157
 158     g_signal_connect_after (m_widget, "clicked",
 159                             G_CALLBACK (gtk_button_clicked_callback),
 160                             this);
 161
 162     g_signal_connect_after (m_widget, "style_set",
 163                             G_CALLBACK (gtk_button_style_set_callback),
 164                             this);
 165
 166     m_parent->DoAddChild( this );
 167
 168     PostCreation(size);
 169
 170     return true;
 171 }
 172
 173
 174 void wxButton::SetDefault()
 175 {
 176     wxWindow *parent = GetParent();
 177     wxCHECK_RET( parent, _T("button without parent?") );
 178
 179     parent->SetDefaultItem(this);
 180
 181     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 182     gtk_widget_grab_default( m_widget );
 183
 184     // resize for default border
 185     gtk_button_style_set_callback( m_widget, NULL, this );
 186 }
 187
 188 /* static */
 189 wxSize wxButtonBase::GetDefaultSize()
 190 {
 191     static wxSize size = wxDefaultSize;
 192     if (size == wxDefaultSize)
 193     {
 194         // NB: Default size of buttons should be same as size of stock
 195         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 196         //     tricky to obtain this size: stock button's size may be smaller
 197         //     than size of button in GtkButtonBox and vice versa,
 198         //     GtkButtonBox's minimal button size may be smaller than stock
 199         //     button's size. We have to retrieve both values and combine them.
 200
 201         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 202         GtkWidget *box = gtk_hbutton_box_new();
 203         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 204         gtk_container_add(GTK_CONTAINER(box), btn);
 205         gtk_container_add(GTK_CONTAINER(wnd), box);
 206         GtkRequisition req;
 207         gtk_widget_size_request(btn, &req);
 208
 209         gint minwidth, minheight;
 210         gtk_widget_style_get(box,
 211                              "child-min-width", &minwidth,
 212                              "child-min-height", &minheight,
 213                              NULL);
 214
 215         size.x = wxMax(minwidth, req.width);
 216         size.y = wxMax(minheight, req.height);
 217
 218         gtk_widget_destroy(wnd);
 219     }
 220     return size;
 221 }
 222
 223 void wxButton::SetLabel( const wxString &lbl )
 224 {
 225     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 226
 227     wxString label(lbl);
 228
 229     if (label.empty() && wxIsStockID(m_windowId))
 230         label = wxGetStockLabel(m_windowId);
 231
 232     wxControl::SetLabel(label);
 233
 234     const wxString labelGTK = GTKConvertMnemonics(label);
 235
 236     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 237     {
 238         const char *stock = wxGetStockGtkID(m_windowId);
 239         if (stock)
 240         {
 241             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 242             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 243             return;
 244         }
 245     }
 246
 247     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 248     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 249
 250     ApplyWidgetStyle( false );
 251 }
 252
 253 bool wxButton::Enable( bool enable )
 254 {
 255     if ( !wxControl::Enable( enable ) )
 256         return FALSE;
 257
 258     gtk_widget_set_sensitive( BUTTON_CHILD(m_widget), enable );
 259
 260     return TRUE;
 261 }
 262
 263 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 264 {
 265     return GTK_BUTTON(m_widget)->event_window;
 266 }
 267
 268 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 269 {
 270     gtk_widget_modify_style(m_widget, style);
 271     gtk_widget_modify_style(BUTTON_CHILD(m_widget), style);
 272 }
 273
 274 wxSize wxButton::DoGetBestSize() const
 275 {
 276     // the default button in wxGTK is bigger than the other ones because of an
 277     // extra border around it, but we don't want to take it into account in
 278     // our size calculations (otherwsie the result is visually ugly), so
 279     // always return the size of non default button from here
 280     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 281     if ( isDefault )
 282     {
 283         // temporarily unset default flag
 284         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 285     }
 286
 287     wxSize ret( wxControl::DoGetBestSize() );
 288
 289     if ( isDefault )
 290     {
 291         // set it back again
 292         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 293     }
 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