src/gtk1/button.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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/gtk1/private.h"
  22 #include "wx/gtk1/win_gtk.h"
  23
  24 //-----------------------------------------------------------------------------
  25 // classes
  26 //-----------------------------------------------------------------------------
  27
  28 class wxButton;
  29
  30 //-----------------------------------------------------------------------------
  31 // idle system
  32 //-----------------------------------------------------------------------------
  33
  34 extern void wxapp_install_idle_handler();
  35 extern bool g_isIdle;
  36
  37 //-----------------------------------------------------------------------------
  38 // data
  39 //-----------------------------------------------------------------------------
  40
  41 extern bool   g_blockEventsOnDrag;
  42
  43 //-----------------------------------------------------------------------------
  44 // "clicked"
  45 //-----------------------------------------------------------------------------
  46
  47 extern "C" {
  48 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  49 {
  50     if (g_isIdle)
  51        wxapp_install_idle_handler();
  52
  53     if (!button->m_hasVMT) return;
  54     if (g_blockEventsOnDrag) return;
  55
  56     wxCommandEvent event(wxEVT_BUTTON, button->GetId());
  57     event.SetEventObject(button);
  58     button->HandleWindowEvent(event);
  59 }
  60 }
  61
  62 //-----------------------------------------------------------------------------
  63 // "style_set" from m_widget
  64 //-----------------------------------------------------------------------------
  65
  66 static gint
  67 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
  68 {
  69     if (g_isIdle)
  70         wxapp_install_idle_handler();
  71
  72     int left_border = 0;
  73     int right_border = 0;
  74     int top_border = 0;
  75     int bottom_border = 0;
  76
  77     /* the default button has a border around it */
  78     if (GTK_WIDGET_CAN_DEFAULT(m_widget))
  79     {
  80         left_border = 6;
  81         right_border = 6;
  82         top_border = 6;
  83         bottom_border = 5;
  84         win->DoMoveWindow( win->m_x-top_border,
  85                            win->m_y-left_border,
  86                            win->m_width+left_border+right_border,
  87                            win->m_height+top_border+bottom_border );
  88     }
  89
  90     return FALSE;
  91 }
  92
  93 //-----------------------------------------------------------------------------
  94 // wxButton
  95 //-----------------------------------------------------------------------------
  96
  97 wxButton::wxButton()
  98 {
  99 }
 100
 101 wxButton::~wxButton()
 102 {
 103 }
 104
 105 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 106       const wxPoint &pos, const wxSize &size,
 107       long style, const wxValidator& validator, const wxString &name )
 108 {
 109     m_needParent = true;
 110     m_acceptsFocus = true;
 111
 112     if (!PreCreation( parent, pos, size ) ||
 113         !CreateBase( parent, id, pos, size, style, validator, name ))
 114     {
 115         wxFAIL_MSG( wxT("wxButton creation failed") );
 116         return false;
 117     }
 118
 119     m_widget = gtk_button_new_with_label("");
 120
 121     float x_alignment = 0.5;
 122     if (HasFlag(wxBU_LEFT))
 123         x_alignment = 0.0;
 124     else if (HasFlag(wxBU_RIGHT))
 125         x_alignment = 1.0;
 126
 127     float y_alignment = 0.5;
 128     if (HasFlag(wxBU_TOP))
 129         y_alignment = 0.0;
 130     else if (HasFlag(wxBU_BOTTOM))
 131         y_alignment = 1.0;
 132
 133     if (GTK_IS_MISC(BUTTON_CHILD(m_widget)))
 134         gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),
 135                                 x_alignment, y_alignment);
 136
 137     SetLabel(label);
 138
 139     if (style & wxNO_BORDER)
 140        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 141
 142     gtk_signal_connect_after( GTK_OBJECT(m_widget), "clicked",
 143       GTK_SIGNAL_FUNC(gtk_button_clicked_callback), (gpointer*)this );
 144
 145     gtk_signal_connect_after( GTK_OBJECT(m_widget), "style_set",
 146       GTK_SIGNAL_FUNC(gtk_button_style_set_callback), (gpointer*) this );
 147
 148     m_parent->DoAddChild( this );
 149
 150     PostCreation(size);
 151
 152     return true;
 153 }
 154
 155
 156 wxWindow *wxButton::SetDefault()
 157 {
 158     wxWindow *oldDefault = wxButtonBase::SetDefault();
 159
 160     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 161     gtk_widget_grab_default( m_widget );
 162
 163     // resize for default border
 164     gtk_button_style_set_callback( m_widget, NULL, this );
 165
 166     return oldDefault;
 167 }
 168
 169 /* static */
 170 wxSize wxButtonBase::GetDefaultSize()
 171 {
 172     return wxSize(80,26);
 173 }
 174
 175 void wxButton::SetLabel( const wxString &lbl )
 176 {
 177     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 178
 179     wxString label(lbl);
 180
 181     if (label.empty() && wxIsStockID(m_windowId))
 182         label = wxGetStockLabel(m_windowId);
 183
 184     wxControl::SetLabel(label);
 185
 186     const wxString labelGTK = GTKRemoveMnemonics(label);
 187
 188     gtk_label_set(GTK_LABEL(BUTTON_CHILD(m_widget)), wxGTK_CONV(labelGTK));
 189 }
 190
 191 bool wxButton::Enable( bool enable )
 192 {
 193     if ( !wxControl::Enable( enable ) )
 194         return false;
 195
 196     gtk_widget_set_sensitive( BUTTON_CHILD(m_widget), enable );
 197
 198     return true;
 199 }
 200
 201 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 202 {
 203     return (window == m_widget->window);
 204 }
 205
 206 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 207 {
 208     gtk_widget_modify_style(m_widget, style);
 209     gtk_widget_modify_style(BUTTON_CHILD(m_widget), style);
 210 }
 211
 212 wxSize wxButton::DoGetBestSize() const
 213 {
 214     // the default button in wxGTK is bigger than the other ones because of an
 215     // extra border around it, but we don't want to take it into account in
 216     // our size calculations (otherwsie the result is visually ugly), so
 217     // always return the size of non default button from here
 218     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 219     if ( isDefault )
 220     {
 221         // temporarily unset default flag
 222         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 223     }
 224
 225     wxSize ret( wxControl::DoGetBestSize() );
 226
 227     if ( isDefault )
 228     {
 229         // set it back again
 230         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 231     }
 232
 233     ret.x += 10;  // add a few pixels for sloppy (but common) themes
 234
 235     if (!HasFlag(wxBU_EXACTFIT))
 236     {
 237         wxSize defaultSize = GetDefaultSize();
 238         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 239         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 240     }
 241
 242     CacheBestSize(ret);
 243     return ret;
 244 }
 245
 246 // static
 247 wxVisualAttributes
 248 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 249 {
 250     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 251 }
 252
 253 #endif // wxUSE_BUTTON