src/gtk/stattext.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/stattext.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_STATTEXT
  14
  15 #include "wx/stattext.h"
  16
  17 #include <gtk/gtk.h>
  18 #include "wx/gtk/private.h"
  19
  20 //-----------------------------------------------------------------------------
  21 // wxStaticText
  22 //-----------------------------------------------------------------------------
  23
  24 wxStaticText::wxStaticText()
  25 {
  26 }
  27
  28 wxStaticText::wxStaticText(wxWindow *parent,
  29                            wxWindowID id,
  30                            const wxString &label,
  31                            const wxPoint &pos,
  32                            const wxSize &size,
  33                            long style,
  34                            const wxString &name)
  35 {
  36     Create( parent, id, label, pos, size, style, name );
  37 }
  38
  39 bool wxStaticText::Create(wxWindow *parent,
  40                           wxWindowID id,
  41                           const wxString &label,
  42                           const wxPoint &pos,
  43                           const wxSize &size,
  44                           long style,
  45                           const wxString &name )
  46 {
  47     if (!PreCreation( parent, pos, size ) ||
  48         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
  49     {
  50         wxFAIL_MSG( wxT("wxStaticText creation failed") );
  51         return false;
  52     }
  53
  54     m_widget = gtk_label_new(NULL);
  55     g_object_ref(m_widget);
  56
  57     GtkJustification justify;
  58     if ( style & wxALIGN_CENTER_HORIZONTAL )
  59       justify = GTK_JUSTIFY_CENTER;
  60     else if ( style & wxALIGN_RIGHT )
  61       justify = GTK_JUSTIFY_RIGHT;
  62     else
  63       justify = GTK_JUSTIFY_LEFT;
  64
  65     if (GetLayoutDirection() == wxLayout_RightToLeft)
  66     {
  67         if (justify == GTK_JUSTIFY_RIGHT)
  68             justify = GTK_JUSTIFY_LEFT;
  69         else if (justify == GTK_JUSTIFY_LEFT)
  70             justify = GTK_JUSTIFY_RIGHT;
  71     }
  72
  73     gtk_label_set_justify(GTK_LABEL(m_widget), justify);
  74
  75     // set ellipsize mode
  76     PangoEllipsizeMode ellipsizeMode = PANGO_ELLIPSIZE_NONE;
  77     if ( style & wxST_ELLIPSIZE_START )
  78         ellipsizeMode = PANGO_ELLIPSIZE_START;
  79     else if ( style & wxST_ELLIPSIZE_MIDDLE )
  80         ellipsizeMode = PANGO_ELLIPSIZE_MIDDLE;
  81     else if ( style & wxST_ELLIPSIZE_END )
  82         ellipsizeMode = PANGO_ELLIPSIZE_END;
  83
  84     gtk_label_set_ellipsize( GTK_LABEL(m_widget), ellipsizeMode );
  85
  86     // GTK_JUSTIFY_LEFT is 0, RIGHT 1 and CENTER 2
  87     static const float labelAlignments[] = { 0.0, 1.0, 0.5 };
  88     gtk_misc_set_alignment(GTK_MISC(m_widget), labelAlignments[justify], 0.0);
  89
  90     gtk_label_set_line_wrap( GTK_LABEL(m_widget), TRUE );
  91
  92     SetLabel(label);
  93
  94     m_parent->DoAddChild( this );
  95
  96     PostCreation(size);
  97
  98     return true;
  99 }
 100
 101 void wxStaticText::GTKDoSetLabel(GTKLabelSetter setter, const wxString& label)
 102 {
 103     wxCHECK_RET( m_widget != NULL, wxT("invalid static text") );
 104
 105     InvalidateBestSize();
 106
 107     (this->*setter)(GTK_LABEL(m_widget), label);
 108
 109     // adjust the label size to the new label unless disabled
 110     if ( !HasFlag(wxST_NO_AUTORESIZE) &&
 111          !IsEllipsized() )  // if ellipsization is ON, then we don't want to get resized!
 112         SetSize( GetBestSize() );
 113 }
 114
 115 void wxStaticText::SetLabel(const wxString& label)
 116 {
 117     m_labelOrig = label;
 118
 119     GTKDoSetLabel(&wxStaticText::GTKSetLabelForLabel, label);
 120 }
 121
 122 #if wxUSE_MARKUP
 123
 124 bool wxStaticText::DoSetLabelMarkup(const wxString& markup)
 125 {
 126     const wxString stripped = RemoveMarkup(markup);
 127     if ( stripped.empty() && !markup.empty() )
 128         return false;
 129
 130     m_labelOrig = stripped;
 131
 132     GTKDoSetLabel(&wxStaticText::GTKSetLabelWithMarkupForLabel, markup);
 133
 134     return true;
 135 }
 136
 137 #endif // wxUSE_MARKUP
 138
 139 bool wxStaticText::SetFont( const wxFont &font )
 140 {
 141     const bool wasUnderlined = GetFont().GetUnderlined();
 142     const bool wasStrickenThrough = GetFont().GetStrikethrough();
 143
 144     bool ret = wxControl::SetFont(font);
 145
 146     const bool isUnderlined = GetFont().GetUnderlined();
 147     const bool isStrickenThrough = GetFont().GetStrikethrough();
 148
 149     if ( (isUnderlined != wasUnderlined) ||
 150             (isStrickenThrough != wasStrickenThrough) )
 151     {
 152         // We need to update the Pango attributes used for the text.
 153         if ( isUnderlined || isStrickenThrough )
 154         {
 155             PangoAttrList* const attrs = pango_attr_list_new();
 156             if ( isUnderlined )
 157             {
 158                 PangoAttribute *a = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
 159                 a->start_index = 0;
 160                 a->end_index = (guint)-1;
 161                 pango_attr_list_insert(attrs, a);
 162             }
 163
 164             if ( isStrickenThrough )
 165             {
 166                 PangoAttribute *a = pango_attr_strikethrough_new( TRUE );
 167                 a->start_index = 0;
 168                 a->end_index = (guint) -1;
 169                 pango_attr_list_insert(attrs, a);
 170             }
 171
 172             gtk_label_set_attributes(GTK_LABEL(m_widget), attrs);
 173             pango_attr_list_unref(attrs);
 174         }
 175         else // No special attributes any more.
 176         {
 177             // Just remove any attributes we had set.
 178             gtk_label_set_attributes(GTK_LABEL(m_widget), NULL);
 179         }
 180
 181         // The underlines for mnemonics are incompatible with using attributes
 182         // so turn them off when setting underlined font.
 183         gtk_label_set_use_underline(GTK_LABEL(m_widget), !isUnderlined);
 184     }
 185
 186     // adjust the label size to the new label unless disabled
 187     if (!HasFlag(wxST_NO_AUTORESIZE))
 188     {
 189         SetSize( GetBestSize() );
 190     }
 191     return ret;
 192 }
 193
 194 wxSize wxStaticText::DoGetBestSize() const
 195 {
 196     // Do not return any arbitrary default value...
 197     wxASSERT_MSG( m_widget, wxT("wxStaticText::DoGetBestSize called before creation") );
 198
 199     // GetBestSize is supposed to return unwrapped size but calling
 200     // gtk_label_set_line_wrap() from here is a bad idea as it queues another
 201     // size request by calling gtk_widget_queue_resize() and we end up in
 202     // infinite loop sometimes (notably when the control is in a toolbar)
 203     // With GTK3 however, there is no simple alternative, and the sizing loop
 204     // no longer seems to occur.
 205 #ifdef __WXGTK3__
 206     gtk_label_set_line_wrap(GTK_LABEL(m_widget), false);
 207 #else
 208     GTK_LABEL(m_widget)->wrap = FALSE;
 209 #endif
 210     wxSize size = wxStaticTextBase::DoGetBestSize();
 211 #ifdef __WXGTK3__
 212     gtk_label_set_line_wrap(GTK_LABEL(m_widget), true);
 213 #else
 214     GTK_LABEL(m_widget)->wrap = TRUE; // restore old value
 215 #endif
 216
 217     // Adding 1 to width to workaround GTK sometimes wrapping the text needlessly
 218     size.x++;
 219     CacheBestSize(size);
 220     return size;
 221 }
 222
 223 bool wxStaticText::GTKWidgetNeedsMnemonic() const
 224 {
 225     return true;
 226 }
 227
 228 void wxStaticText::GTKWidgetDoSetMnemonic(GtkWidget* w)
 229 {
 230     gtk_label_set_mnemonic_widget(GTK_LABEL(m_widget), w);
 231 }
 232
 233
 234 // These functions should be used only when GTK+ < 2.6 by wxStaticTextBase::UpdateLabel()
 235
 236 wxString wxStaticText::DoGetLabel() const
 237 {
 238     GtkLabel *label = GTK_LABEL(m_widget);
 239     return wxGTK_CONV_BACK( gtk_label_get_text( label ) );
 240 }
 241
 242 void wxStaticText::DoSetLabel(const wxString& str)
 243 {
 244     GTKSetLabelForLabel(GTK_LABEL(m_widget), str);
 245 }
 246
 247 // static
 248 wxVisualAttributes
 249 wxStaticText::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 250 {
 251     return GetDefaultAttributesFromGTKWidget(gtk_label_new(""));
 252 }
 253
 254 #endif // wxUSE_STATTEXT