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
  23 //-----------------------------------------------------------------------------
  24 // data
  25 //-----------------------------------------------------------------------------
  26
  27 extern bool   g_blockEventsOnDrag;
  28
  29 //-----------------------------------------------------------------------------
  30 // "clicked"
  31 //-----------------------------------------------------------------------------
  32
  33 extern "C" {
  34 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  35 {
  36     if (!button->m_hasVMT) return;
  37     if (g_blockEventsOnDrag) return;
  38
  39     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  40     event.SetEventObject(button);
  41     button->HandleWindowEvent(event);
  42 }
  43 }
  44
  45 //-----------------------------------------------------------------------------
  46 // "style_set" from m_widget
  47 //-----------------------------------------------------------------------------
  48
  49 extern "C" {
  50 static void
  51 gtk_button_style_set_callback(GtkWidget* widget, GtkStyle*, wxButton* win)
  52 {
  53     /* the default button has a border around it */
  54     wxWindow* parent = win->GetParent();
  55     if (parent && parent->m_wxwindow && GTK_WIDGET_CAN_DEFAULT(widget))
  56     {
  57         GtkBorder* border = NULL;
  58         gtk_widget_style_get(widget, "default_border", &border, NULL);
  59         if (border)
  60         {
  61             win->MoveWindow(
  62                 win->m_x - border->left,
  63                 win->m_y - border->top,
  64                 win->m_width + border->left + border->right,
  65                 win->m_height + border->top + border->bottom);
  66             gtk_border_free(border);
  67         }
  68     }
  69 }
  70 }
  71
  72 //-----------------------------------------------------------------------------
  73 // wxButton
  74 //-----------------------------------------------------------------------------
  75
  76 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
  77
  78 wxButton::wxButton()
  79 {
  80 }
  81
  82 wxButton::~wxButton()
  83 {
  84 }
  85
  86 bool wxButton::Create(wxWindow *parent,
  87                       wxWindowID id,
  88                       const wxString &label,
  89                       const wxPoint& pos,
  90                       const wxSize& size,
  91                       long style,
  92                       const wxValidator& validator,
  93                       const wxString& name)
  94 {
  95     if (!PreCreation( parent, pos, size ) ||
  96         !CreateBase( parent, id, pos, size, style, validator, name ))
  97     {
  98         wxFAIL_MSG( wxT("wxButton creation failed") );
  99         return false;
 100     }
 101
 102     m_widget = gtk_button_new_with_mnemonic("");
 103     g_object_ref(m_widget);
 104
 105     float x_alignment = 0.5;
 106     if (HasFlag(wxBU_LEFT))
 107         x_alignment = 0.0;
 108     else if (HasFlag(wxBU_RIGHT))
 109         x_alignment = 1.0;
 110
 111     float y_alignment = 0.5;
 112     if (HasFlag(wxBU_TOP))
 113         y_alignment = 0.0;
 114     else if (HasFlag(wxBU_BOTTOM))
 115         y_alignment = 1.0;
 116
 117     gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 118
 119     SetLabel(label);
 120
 121     if (style & wxNO_BORDER)
 122        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 123
 124     g_signal_connect_after (m_widget, "clicked",
 125                             G_CALLBACK (gtk_button_clicked_callback),
 126                             this);
 127
 128     g_signal_connect_after (m_widget, "style_set",
 129                             G_CALLBACK (gtk_button_style_set_callback),
 130                             this);
 131
 132     m_parent->DoAddChild( this );
 133
 134     PostCreation(size);
 135
 136     return true;
 137 }
 138
 139
 140 wxWindow *wxButton::SetDefault()
 141 {
 142     wxWindow *oldDefault = wxButtonBase::SetDefault();
 143
 144     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 145     gtk_widget_grab_default( m_widget );
 146
 147     // resize for default border
 148     gtk_button_style_set_callback( m_widget, NULL, this );
 149
 150     return oldDefault;
 151 }
 152
 153 /* static */
 154 wxSize wxButtonBase::GetDefaultSize()
 155 {
 156     static wxSize size = wxDefaultSize;
 157     if (size == wxDefaultSize)
 158     {
 159         // NB: Default size of buttons should be same as size of stock
 160         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 161         //     tricky to obtain this size: stock button's size may be smaller
 162         //     than size of button in GtkButtonBox and vice versa,
 163         //     GtkButtonBox's minimal button size may be smaller than stock
 164         //     button's size. We have to retrieve both values and combine them.
 165
 166         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 167         GtkWidget *box = gtk_hbutton_box_new();
 168         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 169         gtk_container_add(GTK_CONTAINER(box), btn);
 170         gtk_container_add(GTK_CONTAINER(wnd), box);
 171         GtkRequisition req;
 172         gtk_widget_size_request(btn, &req);
 173
 174         gint minwidth, minheight;
 175         gtk_widget_style_get(box,
 176                              "child-min-width", &minwidth,
 177                              "child-min-height", &minheight,
 178                              NULL);
 179
 180         size.x = wxMax(minwidth, req.width);
 181         size.y = wxMax(minheight, req.height);
 182
 183         gtk_widget_destroy(wnd);
 184     }
 185     return size;
 186 }
 187
 188 void wxButton::SetLabel( const wxString &lbl )
 189 {
 190     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 191
 192     wxString label(lbl);
 193
 194     if (label.empty() && wxIsStockID(m_windowId))
 195         label = wxGetStockLabel(m_windowId);
 196
 197     wxControl::SetLabel(label);
 198
 199     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 200     {
 201         const char *stock = wxGetStockGtkID(m_windowId);
 202         if (stock)
 203         {
 204             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 205             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 206             return;
 207         }
 208     }
 209
 210     const wxString labelGTK = GTKConvertMnemonics(label);
 211     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 212     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 213
 214     ApplyWidgetStyle( false );
 215 }
 216
 217 bool wxButton::Enable( bool enable )
 218 {
 219     if ( !wxControl::Enable( enable ) )
 220         return false;
 221
 222     gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
 223
 224     return true;
 225 }
 226
 227 GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 228 {
 229     return GTK_BUTTON(m_widget)->event_window;
 230 }
 231
 232 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 233 {
 234     gtk_widget_modify_style(m_widget, style);
 235     GtkWidget *child = GTK_BIN(m_widget)->child;
 236     gtk_widget_modify_style(child, style);
 237
 238     // for buttons with images, the path to the label is (at least in 2.12)
 239     // GtkButton -> GtkAlignment -> GtkHBox -> GtkLabel
 240     if ( GTK_IS_ALIGNMENT(child) )
 241     {
 242         GtkWidget *box = GTK_BIN(child)->child;
 243         if ( GTK_IS_BOX(box) )
 244         {
 245             for (GList* item = GTK_BOX(box)->children; item; item = item->next)
 246             {
 247                 GtkBoxChild* boxChild = static_cast<GtkBoxChild*>(item->data);
 248                 gtk_widget_modify_style(boxChild->widget, style);
 249             }
 250         }
 251     }
 252 }
 253
 254 wxSize wxButton::DoGetBestSize() const
 255 {
 256     // the default button in wxGTK is bigger than the other ones because of an
 257     // extra border around it, but we don't want to take it into account in
 258     // our size calculations (otherwsie the result is visually ugly), so
 259     // always return the size of non default button from here
 260     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 261     if ( isDefault )
 262     {
 263         // temporarily unset default flag
 264         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 265     }
 266
 267     wxSize ret( wxControl::DoGetBestSize() );
 268
 269     if ( isDefault )
 270     {
 271         // set it back again
 272         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 273     }
 274
 275     if (!HasFlag(wxBU_EXACTFIT))
 276     {
 277         wxSize defaultSize = GetDefaultSize();
 278         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 279         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 280     }
 281
 282     CacheBestSize(ret);
 283     return ret;
 284 }
 285
 286 // static
 287 wxVisualAttributes
 288 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 289 {
 290     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 291 }
 292
 293 #endif // wxUSE_BUTTON