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 #ifdef __WXGTK20__
  80         GtkBorder *default_border = NULL;
  81         gtk_widget_style_get( m_widget, "default_border", &default_border, NULL );
  82         if (default_border)
  83         {
  84             left_border += default_border->left;
  85             right_border += default_border->right;
  86             top_border += default_border->top;
  87             bottom_border += default_border->bottom;
  88             g_free( default_border );
  89         }
  90 #else
  91         left_border = 6;
  92         right_border = 6;
  93         top_border = 6;
  94         bottom_border = 5;
  95 #endif
  96         win->DoMoveWindow( win->m_x-top_border,
  97                            win->m_y-left_border,
  98                            win->m_width+left_border+right_border,
  99                            win->m_height+top_border+bottom_border );
 100     }
 101
 102     return FALSE;
 103 }
 104
 105 //-----------------------------------------------------------------------------
 106 // wxButton
 107 //-----------------------------------------------------------------------------
 108
 109 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
 110
 111 wxButton::wxButton()
 112 {
 113 }
 114
 115 wxButton::~wxButton()
 116 {
 117 }
 118
 119 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 120       const wxPoint &pos, const wxSize &size,
 121       long style, const wxValidator& validator, const wxString &name )
 122 {
 123     m_needParent = TRUE;
 124     m_acceptsFocus = TRUE;
 125
 126     if (!PreCreation( parent, pos, size ) ||
 127         !CreateBase( parent, id, pos, size, style, validator, name ))
 128     {
 129         wxFAIL_MSG( wxT("wxButton creation failed") );
 130         return FALSE;
 131     }
 132
 133 #ifdef __WXGTK20__
 134     m_widget = gtk_button_new_with_mnemonic("");
 135 #else
 136     m_widget = gtk_button_new_with_label("");
 137 #endif
 138
 139     float x_alignment = 0.5;
 140     if (HasFlag(wxBU_LEFT))
 141         x_alignment = 0.0;
 142     else if (HasFlag(wxBU_RIGHT))
 143         x_alignment = 1.0;
 144
 145     float y_alignment = 0.5;
 146     if (HasFlag(wxBU_TOP))
 147         y_alignment = 0.0;
 148     else if (HasFlag(wxBU_BOTTOM))
 149         y_alignment = 1.0;
 150
 151 #ifdef __WXGTK24__
 152     if (!gtk_check_version(2,4,0))
 153     {
 154         gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 155     }
 156     else
 157 #endif
 158     {
 159         if (GTK_IS_MISC(BUTTON_CHILD(m_widget)))
 160             gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),
 161                                 x_alignment, y_alignment);
 162     }
 163
 164     SetLabel(label);
 165
 166     if (style & wxNO_BORDER)
 167        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 168
 169     gtk_signal_connect_after( GTK_OBJECT(m_widget), "clicked",
 170       GTK_SIGNAL_FUNC(gtk_button_clicked_callback), (gpointer*)this );
 171
 172     gtk_signal_connect_after( GTK_OBJECT(m_widget), "style_set",
 173       GTK_SIGNAL_FUNC(gtk_button_style_set_callback), (gpointer*) this );
 174
 175     m_parent->DoAddChild( this );
 176
 177     PostCreation(size);
 178
 179     return true;
 180 }
 181
 182
 183 void wxButton::SetDefault()
 184 {
 185     wxWindow *parent = GetParent();
 186     wxCHECK_RET( parent, _T("button without parent?") );
 187
 188     parent->SetDefaultItem(this);
 189
 190     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 191     gtk_widget_grab_default( m_widget );
 192
 193     // resize for default border
 194     gtk_button_style_set_callback( m_widget, NULL, this );
 195 }
 196
 197 /* static */
 198 wxSize wxButtonBase::GetDefaultSize()
 199 {
 200 #ifdef __WXGTK20__
 201     static wxSize size = wxDefaultSize;
 202     if (size == wxDefaultSize)
 203     {
 204         // NB: Default size of buttons should be same as size of stock
 205         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 206         //     tricky to obtain this size: stock button's size may be smaller
 207         //     than size of button in GtkButtonBox and vice versa,
 208         //     GtkButtonBox's minimal button size may be smaller than stock
 209         //     button's size. We have to retrieve both values and combine them.
 210
 211         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 212         GtkWidget *box = gtk_hbutton_box_new();
 213         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 214         gtk_container_add(GTK_CONTAINER(box), btn);
 215         gtk_container_add(GTK_CONTAINER(wnd), box);
 216         GtkRequisition req;
 217         gtk_widget_size_request(btn, &req);
 218
 219         gint minwidth, minheight;
 220         gtk_widget_style_get(box,
 221                              "child-min-width", &minwidth,
 222                              "child-min-height", &minheight,
 223                              NULL);
 224
 225         size.x = wxMax(minwidth, req.width);
 226         size.y = wxMax(minheight, req.height);
 227
 228         gtk_widget_destroy(wnd);
 229     }
 230     return size;
 231 #else
 232     return wxSize(80,26);
 233 #endif
 234 }
 235
 236 void wxButton::SetLabel( const wxString &lbl )
 237 {
 238     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 239
 240     wxString label(lbl);
 241
 242     if (label.empty() && wxIsStockID(m_windowId))
 243         label = wxGetStockLabel(m_windowId);
 244
 245     wxControl::SetLabel(label);
 246
 247     const wxString labelGTK = GTKConvertMnemonics(label);
 248
 249 #ifdef __WXGTK20__
 250     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 251     {
 252         const char *stock = wxGetStockGtkID(m_windowId);
 253         if (stock)
 254         {
 255             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 256             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 257             return;
 258         }
 259     }
 260
 261     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 262     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 263
 264     ApplyWidgetStyle( false );
 265 #else // GTK+ 1
 266     gtk_label_set(GTK_LABEL(BUTTON_CHILD(m_widget)), wxGTK_CONV(labelGTK));
 267 #endif // GTK+ 2/1
 268 }
 269
 270 bool wxButton::Enable( bool enable )
 271 {
 272     if ( !wxControl::Enable( enable ) )
 273         return FALSE;
 274
 275     gtk_widget_set_sensitive( BUTTON_CHILD(m_widget), enable );
 276
 277     return TRUE;
 278 }
 279
 280 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 281 {
 282 #ifdef __WXGTK20__
 283     return GTK_BUTTON(m_widget)->event_window;
 284 #else
 285     return (window == m_widget->window);
 286 #endif
 287 }
 288
 289 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 290 {
 291     gtk_widget_modify_style(m_widget, style);
 292     gtk_widget_modify_style(BUTTON_CHILD(m_widget), style);
 293 }
 294
 295 wxSize wxButton::DoGetBestSize() const
 296 {
 297     // the default button in wxGTK is bigger than the other ones because of an
 298     // extra border around it, but we don't want to take it into account in
 299     // our size calculations (otherwsie the result is visually ugly), so
 300     // always return the size of non default button from here
 301     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 302     if ( isDefault )
 303     {
 304         // temporarily unset default flag
 305         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 306     }
 307
 308     wxSize ret( wxControl::DoGetBestSize() );
 309
 310     if ( isDefault )
 311     {
 312         // set it back again
 313         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 314     }
 315
 316 #ifndef __WXGTK20__
 317     ret.x += 10;  // add a few pixels for sloppy (but common) themes
 318 #endif
 319
 320     if (!HasFlag(wxBU_EXACTFIT))
 321     {
 322         wxSize defaultSize = GetDefaultSize();
 323         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 324         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 325     }
 326
 327     CacheBestSize(ret);
 328     return ret;
 329 }
 330
 331 // static
 332 wxVisualAttributes
 333 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 334 {
 335     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 336 }
 337
 338 #endif // wxUSE_BUTTON
 339