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 #include "wx/button.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/toplevel.h"
  19 #endif
  20
  21 #include "wx/stockitem.h"
  22
  23 #include "wx/gtk/private.h"
  24 #include "wx/gtk/win_gtk.h"
  25
  26 //-----------------------------------------------------------------------------
  27 // classes
  28 //-----------------------------------------------------------------------------
  29
  30 class wxButton;
  31
  32 //-----------------------------------------------------------------------------
  33 // data
  34 //-----------------------------------------------------------------------------
  35
  36 extern bool   g_blockEventsOnDrag;
  37
  38 //-----------------------------------------------------------------------------
  39 // "clicked"
  40 //-----------------------------------------------------------------------------
  41
  42 extern "C" {
  43 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  44 {
  45     if (g_isIdle)
  46        wxapp_install_idle_handler();
  47
  48     if (!button->m_hasVMT) return;
  49     if (g_blockEventsOnDrag) return;
  50
  51     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  52     event.SetEventObject(button);
  53     button->GetEventHandler()->ProcessEvent(event);
  54 }
  55 }
  56
  57 //-----------------------------------------------------------------------------
  58 // "style_set" from m_widget
  59 //-----------------------------------------------------------------------------
  60
  61 static gint
  62 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
  63 {
  64     if (g_isIdle)
  65         wxapp_install_idle_handler();
  66
  67     int left_border = 0;
  68     int right_border = 0;
  69     int top_border = 0;
  70     int bottom_border = 0;
  71
  72     /* the default button has a border around it */
  73     if (GTK_WIDGET_CAN_DEFAULT(m_widget))
  74     {
  75         GtkBorder *default_border = NULL;
  76         gtk_widget_style_get( m_widget, "default_border", &default_border, NULL );
  77         if (default_border)
  78         {
  79             left_border += default_border->left;
  80             right_border += default_border->right;
  81             top_border += default_border->top;
  82             bottom_border += default_border->bottom;
  83             g_free( default_border );
  84         }
  85         win->MoveWindow(
  86             win->m_x - top_border,
  87             win->m_y - left_border,
  88             win->m_width + left_border + right_border,
  89             win->m_height + top_border + bottom_border);
  90     }
  91
  92     return FALSE;
  93 }
  94
  95 //-----------------------------------------------------------------------------
  96 // wxButton
  97 //-----------------------------------------------------------------------------
  98
  99 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
 100
 101 wxButton::wxButton()
 102 {
 103 }
 104
 105 wxButton::~wxButton()
 106 {
 107 }
 108
 109 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 110       const wxPoint &pos, const wxSize &size,
 111       long style, const wxValidator& validator, const wxString &name )
 112 {
 113     m_needParent = true;
 114     m_acceptsFocus = true;
 115
 116     if (!PreCreation( parent, pos, size ) ||
 117         !CreateBase( parent, id, pos, size, style, validator, name ))
 118     {
 119         wxFAIL_MSG( wxT("wxButton creation failed") );
 120         return false;
 121     }
 122
 123     m_widget = gtk_button_new_with_mnemonic("");
 124
 125     float x_alignment = 0.5;
 126     if (HasFlag(wxBU_LEFT))
 127         x_alignment = 0.0;
 128     else if (HasFlag(wxBU_RIGHT))
 129         x_alignment = 1.0;
 130
 131     float y_alignment = 0.5;
 132     if (HasFlag(wxBU_TOP))
 133         y_alignment = 0.0;
 134     else if (HasFlag(wxBU_BOTTOM))
 135         y_alignment = 1.0;
 136
 137 #ifdef __WXGTK24__
 138     if (!gtk_check_version(2,4,0))
 139     {
 140         gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 141     }
 142     else
 143 #endif
 144     {
 145         if (GTK_IS_MISC(GTK_BIN(m_widget)->child))
 146             gtk_misc_set_alignment(GTK_MISC(GTK_BIN(m_widget)->child),
 147                                 x_alignment, y_alignment);
 148     }
 149
 150     SetLabel(label);
 151
 152     if (style & wxNO_BORDER)
 153        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 154
 155     g_signal_connect_after (m_widget, "clicked",
 156                             G_CALLBACK (gtk_button_clicked_callback),
 157                             this);
 158
 159     g_signal_connect_after (m_widget, "style_set",
 160                             G_CALLBACK (gtk_button_style_set_callback),
 161                             this);
 162
 163     m_parent->DoAddChild( this );
 164
 165     PostCreation(size);
 166
 167     return true;
 168 }
 169
 170
 171 void wxButton::SetDefault()
 172 {
 173     wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
 174     wxCHECK_RET( tlw, _T("button without top level window?") );
 175
 176     tlw->SetDefaultItem(this);
 177
 178     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 179     gtk_widget_grab_default( m_widget );
 180
 181     // resize for default border
 182     gtk_button_style_set_callback( m_widget, NULL, this );
 183 }
 184
 185 /* static */
 186 wxSize wxButtonBase::GetDefaultSize()
 187 {
 188     static wxSize size = wxDefaultSize;
 189     if (size == wxDefaultSize)
 190     {
 191         // NB: Default size of buttons should be same as size of stock
 192         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 193         //     tricky to obtain this size: stock button's size may be smaller
 194         //     than size of button in GtkButtonBox and vice versa,
 195         //     GtkButtonBox's minimal button size may be smaller than stock
 196         //     button's size. We have to retrieve both values and combine them.
 197
 198         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 199         GtkWidget *box = gtk_hbutton_box_new();
 200         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 201         gtk_container_add(GTK_CONTAINER(box), btn);
 202         gtk_container_add(GTK_CONTAINER(wnd), box);
 203         GtkRequisition req;
 204         gtk_widget_size_request(btn, &req);
 205
 206         gint minwidth, minheight;
 207         gtk_widget_style_get(box,
 208                              "child-min-width", &minwidth,
 209                              "child-min-height", &minheight,
 210                              NULL);
 211
 212         size.x = wxMax(minwidth, req.width);
 213         size.y = wxMax(minheight, req.height);
 214
 215         gtk_widget_destroy(wnd);
 216     }
 217     return size;
 218 }
 219
 220 void wxButton::SetLabel( const wxString &lbl )
 221 {
 222     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 223
 224     wxString label(lbl);
 225
 226     if (label.empty() && wxIsStockID(m_windowId))
 227         label = wxGetStockLabel(m_windowId);
 228
 229     wxControl::SetLabel(label);
 230
 231     const wxString labelGTK = GTKConvertMnemonics(label);
 232
 233     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 234     {
 235         const char *stock = wxGetStockGtkID(m_windowId);
 236         if (stock)
 237         {
 238             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 239             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 240             return;
 241         }
 242     }
 243
 244     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 245     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 246
 247     ApplyWidgetStyle( false );
 248 }
 249
 250 bool wxButton::Enable( bool enable )
 251 {
 252     if ( !wxControl::Enable( enable ) )
 253         return false;
 254
 255     gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
 256
 257     return true;
 258 }
 259
 260 GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 261 {
 262     return GTK_BUTTON(m_widget)->event_window;
 263 }
 264
 265 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 266 {
 267     gtk_widget_modify_style(m_widget, style);
 268     gtk_widget_modify_style(GTK_BIN(m_widget)->child, style);
 269 }
 270
 271 wxSize wxButton::DoGetBestSize() const
 272 {
 273     // the default button in wxGTK is bigger than the other ones because of an
 274     // extra border around it, but we don't want to take it into account in
 275     // our size calculations (otherwsie the result is visually ugly), so
 276     // always return the size of non default button from here
 277     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 278     if ( isDefault )
 279     {
 280         // temporarily unset default flag
 281         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 282     }
 283
 284     wxSize ret( wxControl::DoGetBestSize() );
 285
 286     if ( isDefault )
 287     {
 288         // set it back again
 289         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 290     }
 291
 292     if (!HasFlag(wxBU_EXACTFIT))
 293     {
 294         wxSize defaultSize = GetDefaultSize();
 295         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 296         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 297     }
 298
 299     CacheBestSize(ret);
 300     return ret;
 301 }
 302
 303 // static
 304 wxVisualAttributes
 305 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 306 {
 307     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 308 }
 309
 310 #endif // wxUSE_BUTTON