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 // data
  31 //-----------------------------------------------------------------------------
  32
  33 extern bool   g_blockEventsOnDrag;
  34
  35 //-----------------------------------------------------------------------------
  36 // "clicked"
  37 //-----------------------------------------------------------------------------
  38
  39 extern "C" {
  40 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  41 {
  42     if (g_isIdle)
  43        wxapp_install_idle_handler();
  44
  45     if (!button->m_hasVMT) return;
  46     if (g_blockEventsOnDrag) return;
  47
  48     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  49     event.SetEventObject(button);
  50     button->GetEventHandler()->ProcessEvent(event);
  51 }
  52 }
  53
  54 //-----------------------------------------------------------------------------
  55 // "style_set" from m_widget
  56 //-----------------------------------------------------------------------------
  57
  58 static gint
  59 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
  60 {
  61     if (g_isIdle)
  62         wxapp_install_idle_handler();
  63
  64     int left_border = 0;
  65     int right_border = 0;
  66     int top_border = 0;
  67     int bottom_border = 0;
  68
  69     /* the default button has a border around it */
  70     if (GTK_WIDGET_CAN_DEFAULT(m_widget))
  71     {
  72         GtkBorder *default_border = NULL;
  73         gtk_widget_style_get( m_widget, "default_border", &default_border, NULL );
  74         if (default_border)
  75         {
  76             left_border += default_border->left;
  77             right_border += default_border->right;
  78             top_border += default_border->top;
  79             bottom_border += default_border->bottom;
  80             g_free( default_border );
  81         }
  82         win->MoveWindow(
  83             win->m_x - top_border,
  84             win->m_y - left_border,
  85             win->m_width + left_border + right_border,
  86             win->m_height + top_border + bottom_border);
  87     }
  88
  89     return FALSE;
  90 }
  91
  92 //-----------------------------------------------------------------------------
  93 // wxButton
  94 //-----------------------------------------------------------------------------
  95
  96 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
  97
  98 wxButton::wxButton()
  99 {
 100 }
 101
 102 wxButton::~wxButton()
 103 {
 104 }
 105
 106 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 107       const wxPoint &pos, const wxSize &size,
 108       long style, const wxValidator& validator, const wxString &name )
 109 {
 110     m_needParent = TRUE;
 111     m_acceptsFocus = 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 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     // resize for default border
 179     gtk_button_style_set_callback( m_widget, NULL, this );
 180 }
 181
 182 /* static */
 183 wxSize wxButtonBase::GetDefaultSize()
 184 {
 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 }
 216
 217 void wxButton::SetLabel( const wxString &lbl )
 218 {
 219     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 220
 221     wxString label(lbl);
 222
 223     if (label.empty() && wxIsStockID(m_windowId))
 224         label = wxGetStockLabel(m_windowId);
 225
 226     wxControl::SetLabel(label);
 227
 228     const wxString labelGTK = GTKConvertMnemonics(label);
 229
 230     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 231     {
 232         const char *stock = wxGetStockGtkID(m_windowId);
 233         if (stock)
 234         {
 235             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 236             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 237             return;
 238         }
 239     }
 240
 241     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 242     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 243
 244     ApplyWidgetStyle( false );
 245 }
 246
 247 bool wxButton::Enable( bool enable )
 248 {
 249     if ( !wxControl::Enable( enable ) )
 250         return FALSE;
 251
 252     gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
 253
 254     return TRUE;
 255 }
 256
 257 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 258 {
 259     return GTK_BUTTON(m_widget)->event_window;
 260 }
 261
 262 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 263 {
 264     gtk_widget_modify_style(m_widget, style);
 265     gtk_widget_modify_style(GTK_BIN(m_widget)->child, style);
 266 }
 267
 268 wxSize wxButton::DoGetBestSize() const
 269 {
 270     // the default button in wxGTK is bigger than the other ones because of an
 271     // extra border around it, but we don't want to take it into account in
 272     // our size calculations (otherwsie the result is visually ugly), so
 273     // always return the size of non default button from here
 274     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 275     if ( isDefault )
 276     {
 277         // temporarily unset default flag
 278         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 279     }
 280
 281     wxSize ret( wxControl::DoGetBestSize() );
 282
 283     if ( isDefault )
 284     {
 285         // set it back again
 286         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 287     }
 288
 289     if (!HasFlag(wxBU_EXACTFIT))
 290     {
 291         wxSize defaultSize = GetDefaultSize();
 292         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 293         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 294     }
 295
 296     CacheBestSize(ret);
 297     return ret;
 298 }
 299
 300 // static
 301 wxVisualAttributes
 302 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 303 {
 304     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 305 }
 306
 307 #endif // wxUSE_BUTTON
 308