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
 104     float x_alignment = 0.5;
 105     if (HasFlag(wxBU_LEFT))
 106         x_alignment = 0.0;
 107     else if (HasFlag(wxBU_RIGHT))
 108         x_alignment = 1.0;
 109
 110     float y_alignment = 0.5;
 111     if (HasFlag(wxBU_TOP))
 112         y_alignment = 0.0;
 113     else if (HasFlag(wxBU_BOTTOM))
 114         y_alignment = 1.0;
 115
 116     gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 117
 118     SetLabel(label);
 119
 120     if (style & wxNO_BORDER)
 121        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 122
 123     g_signal_connect_after (m_widget, "clicked",
 124                             G_CALLBACK (gtk_button_clicked_callback),
 125                             this);
 126
 127     g_signal_connect_after (m_widget, "style_set",
 128                             G_CALLBACK (gtk_button_style_set_callback),
 129                             this);
 130
 131     m_parent->DoAddChild( this );
 132
 133     PostCreation(size);
 134
 135     return true;
 136 }
 137
 138
 139 wxWindow *wxButton::SetDefault()
 140 {
 141     wxWindow *oldDefault = wxButtonBase::SetDefault();
 142
 143     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 144     gtk_widget_grab_default( m_widget );
 145
 146     // resize for default border
 147     gtk_button_style_set_callback( m_widget, NULL, this );
 148
 149     return oldDefault;
 150 }
 151
 152 /* static */
 153 wxSize wxButtonBase::GetDefaultSize()
 154 {
 155     static wxSize size = wxDefaultSize;
 156     if (size == wxDefaultSize)
 157     {
 158         // NB: Default size of buttons should be same as size of stock
 159         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 160         //     tricky to obtain this size: stock button's size may be smaller
 161         //     than size of button in GtkButtonBox and vice versa,
 162         //     GtkButtonBox's minimal button size may be smaller than stock
 163         //     button's size. We have to retrieve both values and combine them.
 164
 165         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 166         GtkWidget *box = gtk_hbutton_box_new();
 167         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 168         gtk_container_add(GTK_CONTAINER(box), btn);
 169         gtk_container_add(GTK_CONTAINER(wnd), box);
 170         GtkRequisition req;
 171         gtk_widget_size_request(btn, &req);
 172
 173         gint minwidth, minheight;
 174         gtk_widget_style_get(box,
 175                              "child-min-width", &minwidth,
 176                              "child-min-height", &minheight,
 177                              NULL);
 178
 179         size.x = wxMax(minwidth, req.width);
 180         size.y = wxMax(minheight, req.height);
 181
 182         gtk_widget_destroy(wnd);
 183     }
 184     return size;
 185 }
 186
 187 void wxButton::SetLabel( const wxString &lbl )
 188 {
 189     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 190
 191     wxString label(lbl);
 192
 193     if (label.empty() && wxIsStockID(m_windowId))
 194         label = wxGetStockLabel(m_windowId);
 195
 196     wxControl::SetLabel(label);
 197
 198     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 199     {
 200         const char *stock = wxGetStockGtkID(m_windowId);
 201         if (stock)
 202         {
 203             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 204             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 205             return;
 206         }
 207     }
 208
 209     const wxString labelGTK = GTKConvertMnemonics(label);
 210     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 211     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 212
 213     ApplyWidgetStyle( false );
 214 }
 215
 216 bool wxButton::Enable( bool enable )
 217 {
 218     if ( !wxControl::Enable( enable ) )
 219         return false;
 220
 221     gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
 222
 223     return true;
 224 }
 225
 226 GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 227 {
 228     return GTK_BUTTON(m_widget)->event_window;
 229 }
 230
 231 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 232 {
 233     gtk_widget_modify_style(m_widget, style);
 234     GtkWidget *child = GTK_BIN(m_widget)->child;
 235     gtk_widget_modify_style(child, style);
 236
 237     // for buttons with images, the path to the label is (at least in 2.12)
 238     // GtkButton -> GtkAlignment -> GtkHBox -> GtkLabel
 239     if ( GTK_IS_ALIGNMENT(child) )
 240     {
 241         GtkWidget *box = GTK_BIN(child)->child;
 242         if ( GTK_IS_BOX(box) )
 243         {
 244             GList *items = gtk_container_get_children(GTK_CONTAINER(box));
 245             for ( GList *item = items; item; item = item->next )
 246                 gtk_widget_modify_style(GTK_WIDGET(item->data), style);
 247         }
 248     }
 249 }
 250
 251 wxSize wxButton::DoGetBestSize() const
 252 {
 253     // the default button in wxGTK is bigger than the other ones because of an
 254     // extra border around it, but we don't want to take it into account in
 255     // our size calculations (otherwsie the result is visually ugly), so
 256     // always return the size of non default button from here
 257     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 258     if ( isDefault )
 259     {
 260         // temporarily unset default flag
 261         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 262     }
 263
 264     wxSize ret( wxControl::DoGetBestSize() );
 265
 266     if ( isDefault )
 267     {
 268         // set it back again
 269         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 270     }
 271
 272     if (!HasFlag(wxBU_EXACTFIT))
 273     {
 274         wxSize defaultSize = GetDefaultSize();
 275         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 276         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 277     }
 278
 279     CacheBestSize(ret);
 280     return ret;
 281 }
 282
 283 // static
 284 wxVisualAttributes
 285 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 286 {
 287     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 288 }
 289
 290 #endif // wxUSE_BUTTON