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 #include "wx/button.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/toplevel.h"
  19 #endif
  20
  21 #include "wx/stockitem.h"
  22
  23 #include "wx/gtk/private.h"
  24 #include "wx/gtk/win_gtk.h"
  25
  26 //-----------------------------------------------------------------------------
  27 // classes
  28 //-----------------------------------------------------------------------------
  29
  30 class wxButton;
  31
  32 //-----------------------------------------------------------------------------
  33 // data
  34 //-----------------------------------------------------------------------------
  35
  36 extern bool   g_blockEventsOnDrag;
  37
  38 //-----------------------------------------------------------------------------
  39 // "clicked"
  40 //-----------------------------------------------------------------------------
  41
  42 extern "C" {
  43 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  44 {
  45     if (g_isIdle)
  46        wxapp_install_idle_handler();
  47
  48     if (!button->m_hasVMT) return;
  49     if (g_blockEventsOnDrag) return;
  50
  51     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, button->GetId());
  52     event.SetEventObject(button);
  53     button->GetEventHandler()->ProcessEvent(event);
  54 }
  55 }
  56
  57 //-----------------------------------------------------------------------------
  58 // "style_set" from m_widget
  59 //-----------------------------------------------------------------------------
  60
  61 static gint
  62 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
  63 {
  64     if (g_isIdle)
  65         wxapp_install_idle_handler();
  66
  67     int left_border = 0;
  68     int right_border = 0;
  69     int top_border = 0;
  70     int bottom_border = 0;
  71
  72     /* the default button has a border around it */
  73     if (GTK_WIDGET_CAN_DEFAULT(m_widget))
  74     {
  75         GtkBorder *default_border = NULL;
  76         gtk_widget_style_get( m_widget, "default_border", &default_border, NULL );
  77         if (default_border)
  78         {
  79             left_border += default_border->left;
  80             right_border += default_border->right;
  81             top_border += default_border->top;
  82             bottom_border += default_border->bottom;
  83             g_free( default_border );
  84         }
  85         win->MoveWindow(
  86             win->m_x - top_border,
  87             win->m_y - left_border,
  88             win->m_width + left_border + right_border,
  89             win->m_height + top_border + bottom_border);
  90     }
  91
  92     return FALSE;
  93 }
  94
  95 //-----------------------------------------------------------------------------
  96 // wxButton
  97 //-----------------------------------------------------------------------------
  98
  99 IMPLEMENT_DYNAMIC_CLASS(wxButton,wxControl)
 100
 101 wxButton::wxButton()
 102 {
 103 }
 104
 105 wxButton::~wxButton()
 106 {
 107 }
 108
 109 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 110       const wxPoint &pos, const wxSize &size,
 111       long style, const wxValidator& validator, const wxString &name )
 112 {
 113     m_needParent = true;
 114
 115     if (!PreCreation( parent, pos, size ) ||
 116         !CreateBase( parent, id, pos, size, style, validator, name ))
 117     {
 118         wxFAIL_MSG( wxT("wxButton creation failed") );
 119         return false;
 120     }
 121
 122     m_widget = gtk_button_new_with_mnemonic("");
 123
 124     float x_alignment = 0.5;
 125     if (HasFlag(wxBU_LEFT))
 126         x_alignment = 0.0;
 127     else if (HasFlag(wxBU_RIGHT))
 128         x_alignment = 1.0;
 129
 130     float y_alignment = 0.5;
 131     if (HasFlag(wxBU_TOP))
 132         y_alignment = 0.0;
 133     else if (HasFlag(wxBU_BOTTOM))
 134         y_alignment = 1.0;
 135
 136 #ifdef __WXGTK24__
 137     if (!gtk_check_version(2,4,0))
 138     {
 139         gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
 140     }
 141     else
 142 #endif
 143     {
 144         if (GTK_IS_MISC(GTK_BIN(m_widget)->child))
 145             gtk_misc_set_alignment(GTK_MISC(GTK_BIN(m_widget)->child),
 146                                 x_alignment, y_alignment);
 147     }
 148
 149     SetLabel(label);
 150
 151     if (style & wxNO_BORDER)
 152        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 153
 154     g_signal_connect_after (m_widget, "clicked",
 155                             G_CALLBACK (gtk_button_clicked_callback),
 156                             this);
 157
 158     g_signal_connect_after (m_widget, "style_set",
 159                             G_CALLBACK (gtk_button_style_set_callback),
 160                             this);
 161
 162     m_parent->DoAddChild( this );
 163
 164     PostCreation(size);
 165
 166     return true;
 167 }
 168
 169
 170 void wxButton::SetDefault()
 171 {
 172     wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
 173     wxCHECK_RET( tlw, _T("button without top level window?") );
 174
 175     tlw->SetDefaultItem(this);
 176
 177     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 178     gtk_widget_grab_default( m_widget );
 179
 180     // resize for default border
 181     gtk_button_style_set_callback( m_widget, NULL, this );
 182 }
 183
 184 /* static */
 185 wxSize wxButtonBase::GetDefaultSize()
 186 {
 187     static wxSize size = wxDefaultSize;
 188     if (size == wxDefaultSize)
 189     {
 190         // NB: Default size of buttons should be same as size of stock
 191         //     buttons as used in most GTK+ apps. Unfortunately it's a little
 192         //     tricky to obtain this size: stock button's size may be smaller
 193         //     than size of button in GtkButtonBox and vice versa,
 194         //     GtkButtonBox's minimal button size may be smaller than stock
 195         //     button's size. We have to retrieve both values and combine them.
 196
 197         GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 198         GtkWidget *box = gtk_hbutton_box_new();
 199         GtkWidget *btn = gtk_button_new_from_stock(GTK_STOCK_CANCEL);
 200         gtk_container_add(GTK_CONTAINER(box), btn);
 201         gtk_container_add(GTK_CONTAINER(wnd), box);
 202         GtkRequisition req;
 203         gtk_widget_size_request(btn, &req);
 204
 205         gint minwidth, minheight;
 206         gtk_widget_style_get(box,
 207                              "child-min-width", &minwidth,
 208                              "child-min-height", &minheight,
 209                              NULL);
 210
 211         size.x = wxMax(minwidth, req.width);
 212         size.y = wxMax(minheight, req.height);
 213
 214         gtk_widget_destroy(wnd);
 215     }
 216     return size;
 217 }
 218
 219 void wxButton::SetLabel( const wxString &lbl )
 220 {
 221     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 222
 223     wxString label(lbl);
 224
 225     if (label.empty() && wxIsStockID(m_windowId))
 226         label = wxGetStockLabel(m_windowId);
 227
 228     wxControl::SetLabel(label);
 229
 230     const wxString labelGTK = GTKConvertMnemonics(label);
 231
 232     if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))
 233     {
 234         const char *stock = wxGetStockGtkID(m_windowId);
 235         if (stock)
 236         {
 237             gtk_button_set_label(GTK_BUTTON(m_widget), stock);
 238             gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);
 239             return;
 240         }
 241     }
 242
 243     gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(labelGTK));
 244     gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);
 245
 246     ApplyWidgetStyle( false );
 247 }
 248
 249 bool wxButton::Enable( bool enable )
 250 {
 251     if ( !wxControl::Enable( enable ) )
 252         return false;
 253
 254     gtk_widget_set_sensitive(GTK_BIN(m_widget)->child, enable);
 255
 256     return true;
 257 }
 258
 259 GdkWindow *wxButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 260 {
 261     return GTK_BUTTON(m_widget)->event_window;
 262 }
 263
 264 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 265 {
 266     gtk_widget_modify_style(m_widget, style);
 267     gtk_widget_modify_style(GTK_BIN(m_widget)->child, style);
 268 }
 269
 270 wxSize wxButton::DoGetBestSize() const
 271 {
 272     // the default button in wxGTK is bigger than the other ones because of an
 273     // extra border around it, but we don't want to take it into account in
 274     // our size calculations (otherwsie the result is visually ugly), so
 275     // always return the size of non default button from here
 276     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 277     if ( isDefault )
 278     {
 279         // temporarily unset default flag
 280         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 281     }
 282
 283     wxSize ret( wxControl::DoGetBestSize() );
 284
 285     if ( isDefault )
 286     {
 287         // set it back again
 288         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 289     }
 290
 291     if (!HasFlag(wxBU_EXACTFIT))
 292     {
 293         wxSize defaultSize = GetDefaultSize();
 294         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 295         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 296     }
 297
 298     CacheBestSize(ret);
 299     return ret;
 300 }
 301
 302 // static
 303 wxVisualAttributes
 304 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 305 {
 306     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 307 }
 308
 309 #endif // wxUSE_BUTTON