src/gtk1/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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "button.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/defs.h"
  18
  19 #if wxUSE_BUTTON
  20
  21 #include "wx/button.h"
  22
  23 #include "wx/gtk/private.h"
  24
  25 //-----------------------------------------------------------------------------
  26 // classes
  27 //-----------------------------------------------------------------------------
  28
  29 class wxButton;
  30
  31 //-----------------------------------------------------------------------------
  32 // idle system
  33 //-----------------------------------------------------------------------------
  34
  35 extern void wxapp_install_idle_handler();
  36 extern bool g_isIdle;
  37
  38 //-----------------------------------------------------------------------------
  39 // data
  40 //-----------------------------------------------------------------------------
  41
  42 extern bool   g_blockEventsOnDrag;
  43
  44 //-----------------------------------------------------------------------------
  45 // "clicked"
  46 //-----------------------------------------------------------------------------
  47
  48 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  49 {
  50     if (g_isIdle)
  51        wxapp_install_idle_handler();
  52
  53     if (!button->m_hasVMT) return;
  54     if (g_blockEventsOnDrag) return;
  55
  56     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  57     event.SetEventObject(button);
  58     button->GetEventHandler()->ProcessEvent(event);
  59 }
  60
  61 //-----------------------------------------------------------------------------
  62 // wxButton
  63 //-----------------------------------------------------------------------------
  64
  65 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
  66
  67 wxButton::wxButton()
  68 {
  69 }
  70
  71 wxButton::~wxButton()
  72 {
  73 }
  74
  75 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
  76       const wxPoint &pos, const wxSize &size,
  77       long style, const wxValidator& validator, const wxString &name )
  78 {
  79     m_needParent = TRUE;
  80     m_acceptsFocus = TRUE;
  81
  82     if (!PreCreation( parent, pos, size ) ||
  83         !CreateBase( parent, id, pos, size, style, validator, name ))
  84     {
  85         wxFAIL_MSG( wxT("wxButton creation failed") );
  86         return FALSE;
  87     }
  88
  89 /*
  90     wxString label2( label );
  91     for (size_t i = 0; i < label2.Len(); i++)
  92     {
  93         if (label2.GetChar(i) == wxT('&'))
  94         label2.SetChar(i,wxT('_'));
  95     }
  96
  97     GtkWidget *accel_label = gtk_accel_label_new( label2.mb_str() );
  98     gtk_widget_show( accel_label );
  99
 100     m_widget = gtk_button_new();
 101     gtk_container_add( GTK_CONTAINER(m_widget), accel_label );
 102
 103     gtk_accel_label_set_accel_widget( GTK_ACCEL_LABEL(accel_label), m_widget );
 104
 105     guint accel_key = gtk_label_parse_uline (GTK_LABEL(accel_label), label2.mb_str() );
 106     gtk_accel_label_refetch( GTK_ACCEL_LABEL(accel_label) );
 107
 108     wxControl::SetLabel( label );
 109 */
 110
 111 #ifdef __WXGTK20__
 112     if (m_widget == NULL) // may be !=NULL if stock form of Create was used
 113         m_widget = gtk_button_new_with_mnemonic("");
 114 #else
 115     m_widget = gtk_button_new_with_label("");
 116 #endif
 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 #if GTK_CHECK_VERSION(2,4,0)
 131     gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 132 #else
 133     if (GTK_IS_MISC(BUTTON_CHILD(m_widget)))
 134         gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),
 135                                 x_alignment, y_alignment);
 136 #endif
 137
 138     if (!label.empty())
 139         SetLabel(label);
 140
 141     if (style & wxNO_BORDER)
 142        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 143
 144     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 145       GTK_SIGNAL_FUNC(gtk_button_clicked_callback), (gpointer*)this );
 146
 147     m_parent->DoAddChild( this );
 148
 149     PostCreation(size);
 150
 151     return true;
 152 }
 153
 154 bool wxButton::Create(wxWindow *parent, wxWindowID id, wxStockItemID stock,
 155                       const wxString& descriptiveLabel,
 156                       const wxPoint& pos, long style,
 157                       const wxValidator& validator, const wxString& name)
 158 {
 159 #ifdef __WXGTK20__
 160     m_widget = gtk_button_new_from_stock(wxStockItemToGTK(stock));
 161     return Create(parent, id, wxEmptyString,
 162                   pos, wxDefaultSize, style, validator, name);
 163 #else
 164     return CreateStock(parent, id, stock, descriptiveLabel,
 165                        pos, style, validator, name);
 166 #endif
 167 }
 168
 169 void wxButton::SetDefault()
 170 {
 171     wxWindow *parent = GetParent();
 172     wxCHECK_RET( parent, _T("button without parent?") );
 173
 174     parent->SetDefaultItem(this);
 175
 176     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 177     gtk_widget_grab_default( m_widget );
 178
 179     SetSize( m_x, m_y, m_width, m_height );
 180 }
 181
 182 /* static */
 183 wxSize wxButtonBase::GetDefaultSize()
 184 {
 185 #ifdef __WXGTK20__
 186     static wxSize size = wxDefaultSize;
 187     if (size == wxDefaultSize)
 188     {
 189         // NB: Default size of buttons should be same as size of stock
 190         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 191         //     tricky to obtain this size: stock button's size may be smaller
 192         //     than size of button in GtkButtonBox and vice versa,
 193         //     GtkButtonBox's minimal button size may be smaller than stock
 194         //     button's size. We have to retrieve both values and combine them.
 195
 196         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 197         GtkWidget *box = gtk_hbutton_box_new();
 198         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 199         gtk_container_add(GTK_CONTAINER(box), btn);
 200         gtk_container_add(GTK_CONTAINER(wnd), box);
 201         GtkRequisition req;
 202         gtk_widget_size_request(btn, &req);
 203
 204         gint minwidth, minheight;
 205         gtk_widget_style_get(box,
 206                              "child-min-width", &minwidth,
 207                              "child-min-height", &minheight,
 208                              NULL);
 209
 210         size.x = wxMax(minwidth, req.width);
 211         size.y = wxMax(minheight, req.height);
 212
 213         gtk_widget_destroy(wnd);
 214     }
 215     return size;
 216 #else
 217     return wxSize(80,26);
 218 #endif
 219 }
 220
 221 void wxButton::SetLabel( const wxString &label )
 222 {
 223     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 224
 225     wxControl::SetLabel( label );
 226
 227 #ifdef __WXGTK20__
 228     wxString label2 = PrepareLabelMnemonics( label );
 229     gtk_button_set_label( GTK_BUTTON(m_widget), wxGTK_CONV(label2) );
 230 #else
 231     gtk_label_set( GTK_LABEL( BUTTON_CHILD(m_widget) ), wxGTK_CONV( GetLabel() ) );
 232 #endif
 233 }
 234
 235 bool wxButton::Enable( bool enable )
 236 {
 237     if ( !wxControl::Enable( enable ) )
 238         return FALSE;
 239
 240     gtk_widget_set_sensitive( BUTTON_CHILD(m_widget), enable );
 241
 242     return TRUE;
 243 }
 244
 245 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 246 {
 247 #ifdef __WXGTK20__
 248     return GTK_BUTTON(m_widget)->event_window;
 249 #else
 250     return (window == m_widget->window);
 251 #endif
 252 }
 253
 254 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 255 {
 256     gtk_widget_modify_style(m_widget, style);
 257     gtk_widget_modify_style(BUTTON_CHILD(m_widget), style);
 258 }
 259
 260 wxSize wxButton::DoGetBestSize() const
 261 {
 262     // the default button in wxGTK is bigger than the other ones because of an
 263     // extra border around it, but we don't want to take it into account in
 264     // our size calculations (otherwsie the result is visually ugly), so
 265     // always return the size of non default button from here
 266     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 267     if ( isDefault )
 268     {
 269         // temporarily unset default flag
 270         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 271     }
 272
 273     wxSize ret( wxControl::DoGetBestSize() );
 274
 275     if ( isDefault )
 276     {
 277         // set it back again
 278         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 279     }
 280
 281 #ifndef __WXGTK20__
 282     ret.x += 10;  // add a few pixels for sloppy (but common) themes
 283 #endif
 284
 285     if (!HasFlag(wxBU_EXACTFIT))
 286     {
 287         wxSize defaultSize = GetDefaultSize();
 288         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 289         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 290     }
 291
 292     CacheBestSize(ret);
 293     return ret;
 294 }
 295
 296 // static
 297 wxVisualAttributes
 298 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 299 {
 300     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 301 }
 302
 303 #endif // wxUSE_BUTTON
 304