src/gtk1/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/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_COMMAND_BUTTON_CLICKED, button->GetId());
  56     event.SetEventObject(button);
  57     button->GetEventHandler()->ProcessEvent(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 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_label("");
 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     if (GTK_IS_MISC(BUTTON_CHILD(m_widget)))
 135         gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),
 136                                 x_alignment, y_alignment);
 137
 138     SetLabel(label);
 139
 140     if (style & wxNO_BORDER)
 141        gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );
 142
 143     gtk_signal_connect_after( GTK_OBJECT(m_widget), "clicked",
 144       GTK_SIGNAL_FUNC(gtk_button_clicked_callback), (gpointer*)this );
 145
 146     gtk_signal_connect_after( GTK_OBJECT(m_widget), "style_set",
 147       GTK_SIGNAL_FUNC(gtk_button_style_set_callback), (gpointer*) this );
 148
 149     m_parent->DoAddChild( this );
 150
 151     PostCreation(size);
 152
 153     return true;
 154 }
 155
 156
 157 void wxButton::SetDefault()
 158 {
 159     wxWindow *parent = GetParent();
 160     wxCHECK_RET( parent, _T("button without parent?") );
 161
 162     parent->SetDefaultItem(this);
 163
 164     GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 165     gtk_widget_grab_default( m_widget );
 166
 167     // resize for default border
 168     gtk_button_style_set_callback( m_widget, NULL, this );
 169 }
 170
 171 /* static */
 172 wxSize wxButtonBase::GetDefaultSize()
 173 {
 174     return wxSize(80,26);
 175 }
 176
 177 void wxButton::SetLabel( const wxString &lbl )
 178 {
 179     wxCHECK_RET( m_widget != NULL, wxT("invalid button") );
 180
 181     wxString label(lbl);
 182
 183     if (label.empty() && wxIsStockID(m_windowId))
 184         label = wxGetStockLabel(m_windowId);
 185
 186     wxControl::SetLabel(label);
 187
 188     const wxString labelGTK = GTKRemoveMnemonics(label);
 189
 190     gtk_label_set(GTK_LABEL(BUTTON_CHILD(m_widget)), wxGTK_CONV(labelGTK));
 191 }
 192
 193 bool wxButton::Enable( bool enable )
 194 {
 195     if ( !wxControl::Enable( enable ) )
 196         return FALSE;
 197
 198     gtk_widget_set_sensitive( BUTTON_CHILD(m_widget), enable );
 199
 200     return TRUE;
 201 }
 202
 203 bool wxButton::IsOwnGtkWindow( GdkWindow *window )
 204 {
 205     return (window == m_widget->window);
 206 }
 207
 208 void wxButton::DoApplyWidgetStyle(GtkRcStyle *style)
 209 {
 210     gtk_widget_modify_style(m_widget, style);
 211     gtk_widget_modify_style(BUTTON_CHILD(m_widget), style);
 212 }
 213
 214 wxSize wxButton::DoGetBestSize() const
 215 {
 216     // the default button in wxGTK is bigger than the other ones because of an
 217     // extra border around it, but we don't want to take it into account in
 218     // our size calculations (otherwsie the result is visually ugly), so
 219     // always return the size of non default button from here
 220     const bool isDefault = GTK_WIDGET_HAS_DEFAULT(m_widget);
 221     if ( isDefault )
 222     {
 223         // temporarily unset default flag
 224         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 225     }
 226
 227     wxSize ret( wxControl::DoGetBestSize() );
 228
 229     if ( isDefault )
 230     {
 231         // set it back again
 232         GTK_WIDGET_SET_FLAGS( m_widget, GTK_CAN_DEFAULT );
 233     }
 234
 235     ret.x += 10;  // add a few pixels for sloppy (but common) themes
 236
 237     if (!HasFlag(wxBU_EXACTFIT))
 238     {
 239         wxSize defaultSize = GetDefaultSize();
 240         if (ret.x < defaultSize.x) ret.x = defaultSize.x;
 241         if (ret.y < defaultSize.y) ret.y = defaultSize.y;
 242     }
 243
 244     CacheBestSize(ret);
 245     return ret;
 246 }
 247
 248 // static
 249 wxVisualAttributes
 250 wxButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 251 {
 252     return GetDefaultAttributesFromGTKWidget(gtk_button_new);
 253 }
 254
 255 #endif // wxUSE_BUTTON
 256