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 #ifdef __WXGTK20__
 131     gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 132 #else
 133     gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),
 134                             x_alignment, y_alignment);
 135 #endif
 136
 137     if (!label.empty())
 138         SetLabel(label);
 139
 140     if (style & wxNO_BORDER)
 141        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 142
 143     gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
 144       GTK_SIGNAL_FUNC(gtk_button_clicked_callback), (gpointer*)this );
 145
 146     m_parent->DoAddChild( this );
 147
 148     PostCreation(size);
 149
 150     return true;
 151 }
 152
 153 bool wxButton::Create(wxWindow *parent, wxWindowID id, wxStockItemID stock,
 154                       const wxString& descriptiveLabel,
 155                       const wxPoint& pos, long style,
 156                       const wxValidator& validator, const wxString& name)
 157 {
 158 #ifdef __WXGTK20__
 159     m_widget = gtk_button_new_from_stock(wxStockItemToGTK(stock));
 160     return Create(parent, id, wxEmptyString,
 161                   pos, wxDefaultSize, style, validator, name);
 162 #else
 163     return CreateStock(parent, id, stock, descriptiveLabel,
 164                        pos, style, validator, name);
 165 #endif
 166 }
 167
 168 void wxButton::SetDefault()
 169 {
 170     wxWindow *parent = GetParent();
 171     wxCHECK_RET( parent, _T("button without parent?") );
 172
 173     parent->SetDefaultItem(this);
 174
 175     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 176     gtk_widget_grab_default( m_widget );
 177
 178     SetSize( m_x, m_y, m_width, m_height );
 179 }
 180
 181 /* static */
 182 wxSize wxButtonBase::GetDefaultSize()
 183 {
 184 #ifdef __WXGTK20__
 185     static wxSize size = wxDefaultSize;
 186     if (size == wxDefaultSize)
 187     {
 188         // NB: Default size of buttons should be same as size of stock
 189         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 190         //     tricky to obtain this size: stock button's size may be smaller
 191         //     than size of button in GtkButtonBox and vice versa,
 192         //     GtkButtonBox's minimal button size may be smaller than stock
 193         //     button's size. We have to retrieve both values and combine them.
 194
 195         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 196         GtkWidget *box = gtk_hbutton_box_new();
 197         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 198         gtk_container_add(GTK_CONTAINER(box), btn);
 199         gtk_container_add(GTK_CONTAINER(wnd), box);
 200         GtkRequisition req;
 201         gtk_widget_size_request(btn, &req);
 202
 203         gint minwidth, minheight;
 204         gtk_widget_style_get(box,
 205                              "child-min-width", &minwidth,
 206                              "child-min-height", &minheight,
 207                              NULL);
 208
 209         size.x = wxMax(minwidth, req.width);
 210         size.y = wxMax(minheight, req.height);
 211
 212         gtk_widget_destroy(wnd);
 213     }
 214     return size;
 215 #else
 216     return wxSize(80,26);
 217 #endif
 218 }
 219
 220 void wxButton::SetLabel( const wxString &label )
 221 {
 222     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 223
 224     wxControl::SetLabel( label );
 225
 226 #ifdef __WXGTK20__
 227     wxString label2 = PrepareLabelMnemonics( label );
 228     gtk_button_set_label( GTK_BUTTON(m_widget), wxGTK_CONV(label2) );
 229 #else
 230     gtk_label_set( GTK_LABEL( BUTTON_CHILD(m_widget) ), wxGTK_CONV( GetLabel() ) );
 231 #endif
 232 }
 233
 234 bool wxButton::Enable( bool enable )
 235 {
 236     if ( !wxControl::Enable( enable ) )
 237         return FALSE;
 238
 239     gtk_widget_set_sensitive( BUTTON_CHILD(m_widget), enable );
 240
 241     return TRUE;
 242 }
 243
 244 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 245 {
 246 #ifdef __WXGTK20__
 247     return GTK_BUTTON(m_widget)->event_window;
 248 #else
 249     return (window == m_widget->window);
 250 #endif
 251 }
 252
 253 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 254 {
 255     gtk_widget_modify_style(m_widget, style);
 256     gtk_widget_modify_style(BUTTON_CHILD(m_widget), style);
 257 }
 258
 259 wxSize wxButton::DoGetBestSize() const
 260 {
 261     // the default button in wxGTK is bigger than the other ones because of an
 262     // extra border around it, but we don't want to take it into account in
 263     // our size calculations (otherwsie the result is visually ugly), so
 264     // always return the size of non default button from here
 265     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 266     if ( isDefault )
 267     {
 268         // temporarily unset default flag
 269         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 270     }
 271
 272     wxSize ret( wxControl::DoGetBestSize() );
 273
 274     if ( isDefault )
 275     {
 276         // set it back again
 277         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 278     }
 279
 280 #ifndef __WXGTK20__
 281     ret.x += 10;  // add a few pixels for sloppy (but common) themes
 282 #endif
 283
 284     if (!HasFlag(wxBU_EXACTFIT))
 285     {
 286         wxSize defaultSize = GetDefaultSize();
 287         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 288         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 289     }
 290
 291     CacheBestSize(ret);
 292     return ret;
 293 }
 294
 295 // static
 296 wxVisualAttributes
 297 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 298 {
 299     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 300 }
 301
 302 #endif // wxUSE_BUTTON
 303