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