src/gtk1/button.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/button.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Copyright:   (c) 1998 Robert Roebling
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 // For compilers that support precompilation, includes "wx.h".
  10 #include "wx/wxprec.h"
  11
  12 #if wxUSE_BUTTON
  13
  14 #ifndef WX_PRECOMP
  15     #include "wx/button.h"
  16 #endif
  17
  18 #include "wx/stockitem.h"
  19
  20 #include "wx/gtk1/private.h"
  21 #include "wx/gtk1/win_gtk.h"
  22
  23 //-----------------------------------------------------------------------------
  24 // classes
  25 //-----------------------------------------------------------------------------
  26
  27 class wxButton;
  28
  29 //-----------------------------------------------------------------------------
  30 // idle system
  31 //-----------------------------------------------------------------------------
  32
  33 extern void wxapp_install_idle_handler();
  34 extern bool g_isIdle;
  35
  36 //-----------------------------------------------------------------------------
  37 // data
  38 //-----------------------------------------------------------------------------
  39
  40 extern bool   g_blockEventsOnDrag;
  41
  42 //-----------------------------------------------------------------------------
  43 // "clicked"
  44 //-----------------------------------------------------------------------------
  45
  46 extern "C" {
  47 static void gtk_button_clicked_callback( GtkWidget *WXUNUSED(widget), wxButton *button )
  48 {
  49     if (g_isIdle)
  50        wxapp_install_idle_handler();
  51
  52     if (!button->m_hasVMT) return;
  53     if (g_blockEventsOnDrag) return;
  54
  55     wxCommandEvent event(wxEVT_BUTTON, button->GetId());
  56     event.SetEventObject(button);
  57     button->HandleWindowEvent(event);
  58 }
  59 }
  60
  61 //-----------------------------------------------------------------------------
  62 // "style_set" from m_widget
  63 //-----------------------------------------------------------------------------
  64
  65 static gint
  66 gtk_button_style_set_callback( GtkWidget *m_widget, GtkStyle *WXUNUSED(style), wxButton *win )
  67 {
  68     if (g_isIdle)
  69         wxapp_install_idle_handler();
  70
  71     int left_border = 0;
  72     int right_border = 0;
  73     int top_border = 0;
  74     int bottom_border = 0;
  75
  76     /* the default button has a border around it */
  77     if (GTK_WIDGET_CAN_DEFAULT(m_widget))
  78     {
  79         left_border = 6;
  80         right_border = 6;
  81         top_border = 6;
  82         bottom_border = 5;
  83         win->DoMoveWindow( 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 wxButton::wxButton()
  97 {
  98 }
  99
 100 wxButton::~wxButton()
 101 {
 102 }
 103
 104 bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
 105       const wxPoint &pos, const wxSize &size,
 106       long style, const wxValidator& validator, const wxString &name )
 107 {
 108     m_needParent = true;
 109     m_acceptsFocus = true;
 110
 111     if (!PreCreation( parent, pos, size ) ||
 112         !CreateBase( parent, id, pos, size, style, validator, name ))
 113     {
 114         wxFAIL_MSG( wxT("wxButton creation failed") );
 115         return false;
 116     }
 117
 118     m_widget = gtk_button_new_with_label("");
 119
 120     float x_alignment = 0.5;
 121     if (HasFlag(wxBU_LEFT))
 122         x_alignment = 0.0;
 123     else if (HasFlag(wxBU_RIGHT))
 124         x_alignment = 1.0;
 125
 126     float y_alignment = 0.5;
 127     if (HasFlag(wxBU_TOP))
 128         y_alignment = 0.0;
 129     else if (HasFlag(wxBU_BOTTOM))
 130         y_alignment = 1.0;
 131
 132     if (GTK_IS_MISC(BUTTON_CHILD(m_widget)))
 133         gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),
 134                                 x_alignment, y_alignment);
 135
 136     SetLabel(label);
 137
 138     if (style & wxNO_BORDER)
 139        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 140
 141     gtk_signal_connect_after( GTK_OBJECT(m_widget), "clicked",
 142       GTK_SIGNAL_FUNC(gtk_button_clicked_callback), (gpointer*)this );
 143
 144     gtk_signal_connect_after( GTK_OBJECT(m_widget), "style_set",
 145       GTK_SIGNAL_FUNC(gtk_button_style_set_callback), (gpointer*) this );
 146
 147     m_parent->DoAddChild( this );
 148
 149     PostCreation(size);
 150
 151     return true;
 152 }
 153
 154
 155 wxWindow *wxButton::SetDefault()
 156 {
 157     wxWindow *oldDefault = wxButtonBase::SetDefault();
 158
 159     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 160     gtk_widget_grab_default( m_widget );
 161
 162     // resize for default border
 163     gtk_button_style_set_callback( m_widget, NULL, this );
 164
 165     return oldDefault;
 166 }
 167
 168 /* static */
 169 wxSize wxButtonBase::GetDefaultSize()
 170 {
 171     return wxSize(80,26);
 172 }
 173
 174 void wxButton::SetLabel( const wxString &lbl )
 175 {
 176     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 177
 178     wxString label(lbl);
 179
 180     if (label.empty() && wxIsStockID(m_windowId))
 181         label = wxGetStockLabel(m_windowId);
 182
 183     wxControl::SetLabel(label);
 184
 185     const wxString labelGTK = GTKRemoveMnemonics(label);
 186
 187     gtk_label_set(GTK_LABEL(BUTTON_CHILD(m_widget)), wxGTK_CONV(labelGTK));
 188 }
 189
 190 bool wxButton::Enable( bool enable )
 191 {
 192     if ( !wxControl::Enable( enable ) )
 193         return false;
 194
 195     gtk_widget_set_sensitive( BUTTON_CHILD(m_widget), enable );
 196
 197     return true;
 198 }
 199
 200 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 201 {
 202     return (window == m_widget->window);
 203 }
 204
 205 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 206 {
 207     gtk_widget_modify_style(m_widget, style);
 208     gtk_widget_modify_style(BUTTON_CHILD(m_widget), style);
 209 }
 210
 211 wxSize wxButton::DoGetBestSize() const
 212 {
 213     // the default button in wxGTK is bigger than the other ones because of an
 214     // extra border around it, but we don't want to take it into account in
 215     // our size calculations (otherwsie the result is visually ugly), so
 216     // always return the size of non default button from here
 217     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 218     if ( isDefault )
 219     {
 220         // temporarily unset default flag
 221         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 222     }
 223
 224     wxSize ret( wxControl::DoGetBestSize() );
 225
 226     if ( isDefault )
 227     {
 228         // set it back again
 229         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 230     }
 231
 232     ret.x += 10;  // add a few pixels for sloppy (but common) themes
 233
 234     if (!HasFlag(wxBU_EXACTFIT))
 235     {
 236         wxSize defaultSize = GetDefaultSize();
 237         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 238         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 239     }
 240
 241     CacheBestSize(ret);
 242     return ret;
 243 }
 244
 245 // static
 246 wxVisualAttributes
 247 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 248 {
 249     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 250 }
 251
 252 #endif // wxUSE_BUTTON