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 #include "wx/stockitem.h"
  17
  18 #include "wx/gtk/private.h"
  19 #include "wx/gtk/win_gtk.h"
  20
  21 //-----------------------------------------------------------------------------
  22 // classes
  23 //-----------------------------------------------------------------------------
  24
  25 class wxButton;
  26
  27 //-----------------------------------------------------------------------------
  28 // data
  29 //-----------------------------------------------------------------------------
  30
  31 extern bool   g_blockEventsOnDrag;
  32
  33 //-----------------------------------------------------------------------------
  34 // "clicked"
  35 //-----------------------------------------------------------------------------
  36
  37 extern "C" {
  38 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  39 {
  40     if (g_isIdle)
  41        wxapp_install_idle_handler();
  42
  43     if (!button->m_hasVMT) return;
  44     if (g_blockEventsOnDrag) return;
  45
  46     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  47     event.SetEventObject(button);
  48     button->GetEventHandler()->ProcessEvent(event);
  49 }
  50 }
  51
  52 //-----------------------------------------------------------------------------
  53 // "style_set" from m_widget
  54 //-----------------------------------------------------------------------------
  55
  56 static gint
  57 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
  58 {
  59     if (g_isIdle)
  60         wxapp_install_idle_handler();
  61
  62     int left_border = 0;
  63     int right_border = 0;
  64     int top_border = 0;
  65     int bottom_border = 0;
  66
  67     /* the default button has a border around it */
  68     if (GTK_WIDGET_CAN_DEFAULT(m_widget))
  69     {
  70         GtkBorder *default_border = NULL;
  71         gtk_widget_style_get( m_widget, "default_border", &default_border, NULL );
  72         if (default_border)
  73         {
  74             left_border += default_border->left;
  75             right_border += default_border->right;
  76             top_border += default_border->top;
  77             bottom_border += default_border->bottom;
  78             g_free( default_border );
  79         }
  80         win->MoveWindow(
  81             win->m_x - top_border,
  82             win->m_y - left_border,
  83             win->m_width + left_border + right_border,
  84             win->m_height + top_border + bottom_border);
  85     }
  86
  87     return FALSE;
  88 }
  89
  90 //-----------------------------------------------------------------------------
  91 // wxButton
  92 //-----------------------------------------------------------------------------
  93
  94 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
  95
  96 wxButton::wxButton()
  97 {
  98 }
  99
 100 wxButton::~wxButton()
 101 {
 102 }
 103
 104 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 105       const wxPoint &pos, const wxSize &size,
 106       long style, const wxValidator& validator, const wxString &name )
 107 {
 108     m_needParent = true;
 109     m_acceptsFocus = true;
 110
 111     if (!PreCreation( parent, pos, size ) ||
 112         !CreateBase( parent, id, pos, size, style, validator, name ))
 113     {
 114         wxFAIL_MSG( wxT("wxButton creation failed") );
 115         return false;
 116     }
 117
 118     m_widget = gtk_button_new_with_mnemonic("");
 119
 120     float x_alignment = 0.5;
 121     if (HasFlag(wxBU_LEFT))
 122         x_alignment = 0.0;
 123     else if (HasFlag(wxBU_RIGHT))
 124         x_alignment = 1.0;
 125
 126     float y_alignment = 0.5;
 127     if (HasFlag(wxBU_TOP))
 128         y_alignment = 0.0;
 129     else if (HasFlag(wxBU_BOTTOM))
 130         y_alignment = 1.0;
 131
 132 #ifdef __WXGTK24__
 133     if (!gtk_check_version(2,4,0))
 134     {
 135         gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 136     }
 137     else
 138 #endif
 139     {
 140         if (GTK_IS_MISC(GTK_BIN(m_widget)->child))
 141             gtk_misc_set_alignment(GTK_MISC(GTK_BIN(m_widget)->child),
 142                                 x_alignment, y_alignment);
 143     }
 144
 145     SetLabel(label);
 146
 147     if (style & wxNO_BORDER)
 148        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 149
 150     g_signal_connect_after (m_widget, "clicked",
 151                             G_CALLBACK (gtk_button_clicked_callback),
 152                             this);
 153
 154     g_signal_connect_after (m_widget, "style_set",
 155                             G_CALLBACK (gtk_button_style_set_callback),
 156                             this);
 157
 158     m_parent->DoAddChild( this );
 159
 160     PostCreation(size);
 161
 162     return true;
 163 }
 164
 165
 166 void wxButton::SetDefault()
 167 {
 168     wxWindow *parent = GetParent();
 169     wxCHECK_RET( parent, _T("button without parent?") );
 170
 171     parent->SetDefaultItem(this);
 172
 173     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 174     gtk_widget_grab_default( m_widget );
 175
 176     // resize for default border
 177     gtk_button_style_set_callback( m_widget, NULL, this );
 178 }
 179
 180 /* static */
 181 wxSize wxButtonBase::GetDefaultSize()
 182 {
 183     static wxSize size = wxDefaultSize;
 184     if (size == wxDefaultSize)
 185     {
 186         // NB: Default size of buttons should be same as size of stock
 187         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 188         //     tricky to obtain this size: stock button's size may be smaller
 189         //     than size of button in GtkButtonBox and vice versa,
 190         //     GtkButtonBox's minimal button size may be smaller than stock
 191         //     button's size. We have to retrieve both values and combine them.
 192
 193         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 194         GtkWidget *box = gtk_hbutton_box_new();
 195         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 196         gtk_container_add(GTK_CONTAINER(box), btn);
 197         gtk_container_add(GTK_CONTAINER(wnd), box);
 198         GtkRequisition req;
 199         gtk_widget_size_request(btn, &req);
 200
 201         gint minwidth, minheight;
 202         gtk_widget_style_get(box,
 203                              "child-min-width", &minwidth,
 204                              "child-min-height", &minheight,
 205                              NULL);
 206
 207         size.x = wxMax(minwidth, req.width);
 208         size.y = wxMax(minheight, req.height);
 209
 210         gtk_widget_destroy(wnd);
 211     }
 212     return size;
 213 }
 214
 215 void wxButton::SetLabel( const wxString &lbl )
 216 {
 217     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 218
 219     wxString label(lbl);
 220
 221     if (label.empty() && wxIsStockID(m_windowId))
 222         label = wxGetStockLabel(m_windowId);
 223
 224     wxControl::SetLabel(label);
 225
 226     const wxString labelGTK = GTKConvertMnemonics(label);
 227
 228     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 229     {
 230         const char *stock = wxGetStockGtkID(m_windowId);
 231         if (stock)
 232         {
 233             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 234             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 235             return;
 236         }
 237     }
 238
 239     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 240     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 241
 242     ApplyWidgetStyle( false );
 243 }
 244
 245 bool wxButton::Enable( bool enable )
 246 {
 247     if ( !wxControl::Enable( enable ) )
 248         return false;
 249
 250     gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
 251
 252     return true;
 253 }
 254
 255 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 256 {
 257     return GTK_BUTTON(m_widget)->event_window;
 258 }
 259
 260 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 261 {
 262     gtk_widget_modify_style(m_widget, style);
 263     gtk_widget_modify_style(GTK_BIN(m_widget)->child, style);
 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