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 #ifndef WX_PRECOMP
  16     #include "wx/button.h"
  17 #endif
  18
  19 #include "wx/stockitem.h"
  20
  21 #include "wx/gtk/private.h"
  22 #include "wx/gtk/win_gtk.h"
  23
  24 //-----------------------------------------------------------------------------
  25 // classes
  26 //-----------------------------------------------------------------------------
  27
  28 class wxButton;
  29
  30 //-----------------------------------------------------------------------------
  31 // data
  32 //-----------------------------------------------------------------------------
  33
  34 extern bool   g_blockEventsOnDrag;
  35
  36 //-----------------------------------------------------------------------------
  37 // "clicked"
  38 //-----------------------------------------------------------------------------
  39
  40 extern "C" {
  41 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  42 {
  43     if (g_isIdle)
  44        wxapp_install_idle_handler();
  45
  46     if (!button->m_hasVMT) return;
  47     if (g_blockEventsOnDrag) return;
  48
  49     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  50     event.SetEventObject(button);
  51     button->GetEventHandler()->ProcessEvent(event);
  52 }
  53 }
  54
  55 //-----------------------------------------------------------------------------
  56 // "style_set" from m_widget
  57 //-----------------------------------------------------------------------------
  58
  59 static gint
  60 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
  61 {
  62     if (g_isIdle)
  63         wxapp_install_idle_handler();
  64
  65     int left_border = 0;
  66     int right_border = 0;
  67     int top_border = 0;
  68     int bottom_border = 0;
  69
  70     /* the default button has a border around it */
  71     if (GTK_WIDGET_CAN_DEFAULT(m_widget))
  72     {
  73         GtkBorder *default_border = NULL;
  74         gtk_widget_style_get( m_widget, "default_border", &default_border, NULL );
  75         if (default_border)
  76         {
  77             left_border += default_border->left;
  78             right_border += default_border->right;
  79             top_border += default_border->top;
  80             bottom_border += default_border->bottom;
  81             g_free( default_border );
  82         }
  83         win->MoveWindow(
  84             win->m_x - top_border,
  85             win->m_y - left_border,
  86             win->m_width + left_border + right_border,
  87             win->m_height + top_border + bottom_border);
  88     }
  89
  90     return FALSE;
  91 }
  92
  93 //-----------------------------------------------------------------------------
  94 // wxButton
  95 //-----------------------------------------------------------------------------
  96
  97 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
  98
  99 wxButton::wxButton()
 100 {
 101 }
 102
 103 wxButton::~wxButton()
 104 {
 105 }
 106
 107 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 108       const wxPoint &pos, const wxSize &size,
 109       long style, const wxValidator& validator, const wxString &name )
 110 {
 111     m_needParent = true;
 112
 113     if (!PreCreation( parent, pos, size ) ||
 114         !CreateBase( parent, id, pos, size, style, validator, name ))
 115     {
 116         wxFAIL_MSG( wxT("wxButton creation failed") );
 117         return false;
 118     }
 119
 120     m_widget = gtk_button_new_with_mnemonic("");
 121
 122     float x_alignment = 0.5;
 123     if (HasFlag(wxBU_LEFT))
 124         x_alignment = 0.0;
 125     else if (HasFlag(wxBU_RIGHT))
 126         x_alignment = 1.0;
 127
 128     float y_alignment = 0.5;
 129     if (HasFlag(wxBU_TOP))
 130         y_alignment = 0.0;
 131     else if (HasFlag(wxBU_BOTTOM))
 132         y_alignment = 1.0;
 133
 134 #ifdef __WXGTK24__
 135     if (!gtk_check_version(2,4,0))
 136     {
 137         gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 138     }
 139     else
 140 #endif
 141     {
 142         if (GTK_IS_MISC(GTK_BIN(m_widget)->child))
 143             gtk_misc_set_alignment(GTK_MISC(GTK_BIN(m_widget)->child),
 144                                 x_alignment, y_alignment);
 145     }
 146
 147     SetLabel(label);
 148
 149     if (style & wxNO_BORDER)
 150        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 151
 152     g_signal_connect_after (m_widget, "clicked",
 153                             G_CALLBACK (gtk_button_clicked_callback),
 154                             this);
 155
 156     g_signal_connect_after (m_widget, "style_set",
 157                             G_CALLBACK (gtk_button_style_set_callback),
 158                             this);
 159
 160     m_parent->DoAddChild( this );
 161
 162     PostCreation(size);
 163
 164     return true;
 165 }
 166
 167
 168 wxWindow *wxButton::SetDefault()
 169 {
 170     wxWindow *oldDefault = wxButtonBase::SetDefault();
 171
 172     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 173     gtk_widget_grab_default( m_widget );
 174
 175     // resize for default border
 176     gtk_button_style_set_callback( m_widget, NULL, this );
 177
 178     return oldDefault;
 179 }
 180
 181 /* static */
 182 wxSize wxButtonBase::GetDefaultSize()
 183 {
 184     static wxSize size = wxDefaultSize;
 185     if (size == wxDefaultSize)
 186     {
 187         // NB: Default size of buttons should be same as size of stock
 188         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 189         //     tricky to obtain this size: stock button's size may be smaller
 190         //     than size of button in GtkButtonBox and vice versa,
 191         //     GtkButtonBox's minimal button size may be smaller than stock
 192         //     button's size. We have to retrieve both values and combine them.
 193
 194         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 195         GtkWidget *box = gtk_hbutton_box_new();
 196         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 197         gtk_container_add(GTK_CONTAINER(box), btn);
 198         gtk_container_add(GTK_CONTAINER(wnd), box);
 199         GtkRequisition req;
 200         gtk_widget_size_request(btn, &req);
 201
 202         gint minwidth, minheight;
 203         gtk_widget_style_get(box,
 204                              "child-min-width", &minwidth,
 205                              "child-min-height", &minheight,
 206                              NULL);
 207
 208         size.x = wxMax(minwidth, req.width);
 209         size.y = wxMax(minheight, req.height);
 210
 211         gtk_widget_destroy(wnd);
 212     }
 213     return size;
 214 }
 215
 216 void wxButton::SetLabel( const wxString &lbl )
 217 {
 218     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 219
 220     wxString label(lbl);
 221
 222     if (label.empty() && wxIsStockID(m_windowId))
 223         label = wxGetStockLabel(m_windowId);
 224
 225     wxControl::SetLabel(label);
 226
 227     const wxString labelGTK = GTKConvertMnemonics(label);
 228
 229     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 230     {
 231         const char *stock = wxGetStockGtkID(m_windowId);
 232         if (stock)
 233         {
 234             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 235             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 236             return;
 237         }
 238     }
 239
 240     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 241     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 242
 243     ApplyWidgetStyle( false );
 244 }
 245
 246 bool wxButton::Enable( bool enable )
 247 {
 248     if ( !wxControl::Enable( enable ) )
 249         return false;
 250
 251     gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
 252
 253     return true;
 254 }
 255
 256 GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 257 {
 258     return GTK_BUTTON(m_widget)->event_window;
 259 }
 260
 261 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 262 {
 263     gtk_widget_modify_style(m_widget, style);
 264     gtk_widget_modify_style(GTK_BIN(m_widget)->child, style);
 265 }
 266
 267 wxSize wxButton::DoGetBestSize() const
 268 {
 269     // the default button in wxGTK is bigger than the other ones because of an
 270     // extra border around it, but we don't want to take it into account in
 271     // our size calculations (otherwsie the result is visually ugly), so
 272     // always return the size of non default button from here
 273     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 274     if ( isDefault )
 275     {
 276         // temporarily unset default flag
 277         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 278     }
 279
 280     wxSize ret( wxControl::DoGetBestSize() );
 281
 282     if ( isDefault )
 283     {
 284         // set it back again
 285         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 286     }
 287
 288     if (!HasFlag(wxBU_EXACTFIT))
 289     {
 290         wxSize defaultSize = GetDefaultSize();
 291         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 292         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 293     }
 294
 295     CacheBestSize(ret);
 296     return ret;
 297 }
 298
 299 // static
 300 wxVisualAttributes
 301 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 302 {
 303     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 304 }
 305
 306 #endif // wxUSE_BUTTON