33c1534341c5a71cb147ff962a2014cb29768fe0
1 /** \file
2 * extension parameter for enumerations.
3 *
4 * It uses a Gtk:ComboBoxText widget in the extension UI.
5 */
7 /*
8 * Author:
9 * Johan Engelen <johan@shouraizou.nl>
10 *
11 * Copyright (C) 2006-2007 Johan Engelen
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #ifdef HAVE_CONFIG_H
17 # include "config.h"
18 #endif
21 #include <gtkmm/box.h>
22 #include <gtkmm/comboboxtext.h>
23 #include <gtkmm/tooltips.h>
24 #include <gtkmm/label.h>
26 #include <glibmm/i18n.h>
28 #include <xml/node.h>
30 #include <extension/extension.h>
31 #include <prefs-utils.h>
32 #include <document-private.h>
33 #include <sp-object.h>
35 #include "enum.h"
36 #include "preferences.h"
38 /** \brief The root directory in the preferences database for extension
39 related parameters. */
40 #define PREF_DIR "extensions"
42 namespace Inkscape {
43 namespace Extension {
45 /* For internal use only.
46 Note that value and guitext MUST be non-NULL. This is ensured by newing only at one location in the code where non-NULL checks are made. */
47 class enumentry {
48 public:
49 enumentry (Glib::ustring * val, Glib::ustring * text) {
50 value = val;
51 guitext = text;
52 }
53 ~enumentry() {
54 delete value;
55 delete guitext;
56 }
58 Glib::ustring * value;
59 Glib::ustring * guitext;
60 };
63 ParamComboBox::ParamComboBox (const gchar * name, const gchar * guitext, const gchar * desc, const Parameter::_scope_t scope, bool gui_hidden, const gchar * gui_tip, Inkscape::Extension::Extension * ext, Inkscape::XML::Node * xml) :
64 Parameter(name, guitext, desc, scope, gui_hidden, gui_tip, ext)
65 {
66 choices = NULL;
67 _value = NULL;
69 // Read XML tree to add enumeration items:
70 // printf("Extension Constructor: ");
71 if (xml != NULL) {
72 Inkscape::XML::Node *child_repr = sp_repr_children(xml);
73 while (child_repr != NULL) {
74 char const * chname = child_repr->name();
75 if (!strcmp(chname, "extension:item") || !strcmp(chname, "extension:_item")) {
76 Glib::ustring * newguitext = NULL;
77 Glib::ustring * newvalue = NULL;
78 const char * contents = sp_repr_children(child_repr)->content();
79 if (contents != NULL)
80 // don't translate when 'item' but do translate when '_item'
81 // NOTE: internal extensions use build_from_mem and don't need _item but
82 // still need to include if are to be localized
83 newguitext = new Glib::ustring( !strcmp(chname, "extension:_item") ? _(contents) : contents );
84 else
85 continue;
87 const char * val = child_repr->attribute("value");
88 if (val != NULL)
89 newvalue = new Glib::ustring(val);
90 else
91 newvalue = new Glib::ustring(contents);
93 if ( (newguitext) && (newvalue) ) { // logical error if this is not true here
94 choices = g_slist_append( choices, new enumentry(newvalue, newguitext) );
95 }
96 }
97 child_repr = sp_repr_next(child_repr);
98 }
99 }
101 // Initialize _value with the default value from xml
102 // for simplicity : default to the contents of the first xml-child
103 const char * defaultval = NULL;
104 if (sp_repr_children(sp_repr_children(xml)) != NULL)
105 defaultval = sp_repr_children(xml)->attribute("value");
107 gchar * pref_name = this->pref_name();
108 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
109 Glib::ustring paramval = prefs->getString(PREF_DIR, pref_name);
110 g_free(pref_name);
112 if (!paramval.empty())
113 defaultval = paramval.data();
114 if (defaultval != NULL)
115 _value = g_strdup(defaultval);
117 return;
118 }
120 ParamComboBox::~ParamComboBox (void)
121 {
122 //destroy choice strings
123 for (GSList * list = choices; list != NULL; list = g_slist_next(list)) {
124 delete (reinterpret_cast<enumentry *>(list->data));
125 }
126 g_slist_free(choices);
128 g_free(_value);
129 }
132 /** \brief A function to set the \c _value
133 \param in The value to set
134 \param doc A document that should be used to set the value.
135 \param node The node where the value may be placed
137 This function sets ONLY the internal value, but it also sets the value
138 in the preferences structure. To put it in the right place, \c PREF_DIR
139 and \c pref_name() are used.
141 To copy the data into _value the old memory must be free'd first.
142 It is important to note that \c g_free handles \c NULL just fine. Then
143 the passed in value is duplicated using \c g_strdup().
144 */
145 const gchar *
146 ParamComboBox::set (const gchar * in, SPDocument * /*doc*/, Inkscape::XML::Node * /*node*/)
147 {
148 if (in == NULL) return NULL; /* Can't have NULL string */
150 Glib::ustring * settext = NULL;
151 for (GSList * list = choices; list != NULL; list = g_slist_next(list)) {
152 enumentry * entr = reinterpret_cast<enumentry *>(list->data);
153 if ( !entr->guitext->compare(in) ) {
154 settext = entr->value;
155 break; // break out of for loop
156 }
157 }
158 if (settext) {
159 if (_value != NULL) g_free(_value);
160 _value = g_strdup(settext->c_str());
161 gchar * prefname = this->pref_name();
162 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
163 prefs->setString(PREF_DIR, prefname, _value);
164 g_free(prefname);
165 }
167 return _value;
168 }
170 void
171 ParamComboBox::changed (void) {
173 }
176 /**
177 \brief A function to get the value of the parameter in string form
178 \return A string with the 'value' as command line argument
179 */
180 void
181 ParamComboBox::string (std::string &string)
182 {
183 string += _value;
184 return;
185 }
190 /** \brief A special category of Gtk::Entry to handle string parameteres */
191 class ParamComboBoxEntry : public Gtk::ComboBoxText {
192 private:
193 ParamComboBox * _pref;
194 SPDocument * _doc;
195 Inkscape::XML::Node * _node;
196 sigc::signal<void> * _changeSignal;
197 public:
198 /** \brief Build a string preference for the given parameter
199 \param pref Where to get the string from, and where to put it
200 when it changes.
201 */
202 ParamComboBoxEntry (ParamComboBox * pref, SPDocument * doc, Inkscape::XML::Node * node, sigc::signal<void> * changeSignal) :
203 Gtk::ComboBoxText(), _pref(pref), _doc(doc), _node(node), _changeSignal(changeSignal) {
204 this->signal_changed().connect(sigc::mem_fun(this, &ParamComboBoxEntry::changed));
205 };
206 void changed (void);
207 };
209 /** \brief Respond to the text box changing
211 This function responds to the box changing by grabbing the value
212 from the text box and putting it in the parameter.
213 */
214 void
215 ParamComboBoxEntry::changed (void)
216 {
217 Glib::ustring data = this->get_active_text();
218 _pref->set(data.c_str(), _doc, _node);
219 if (_changeSignal != NULL) {
220 _changeSignal->emit();
221 }
222 }
224 /**
225 \brief Creates a combobox widget for an enumeration parameter
226 */
227 Gtk::Widget *
228 ParamComboBox::get_widget (SPDocument * doc, Inkscape::XML::Node * node, sigc::signal<void> * changeSignal)
229 {
230 if (_gui_hidden) return NULL;
232 Gtk::HBox * hbox = Gtk::manage(new Gtk::HBox(false, 4));
234 Gtk::Label * label = Gtk::manage(new Gtk::Label(_(_text), Gtk::ALIGN_LEFT));
235 label->show();
236 hbox->pack_start(*label, false, false);
238 ParamComboBoxEntry * combo = Gtk::manage(new ParamComboBoxEntry(this, doc, node, changeSignal));
239 // add choice strings:
240 Glib::ustring * settext = 0;
241 for (GSList * list = choices; list != NULL; list = g_slist_next(list)) {
242 enumentry * entr = reinterpret_cast<enumentry *>(list->data);
243 Glib::ustring * text = entr->guitext;
244 combo->append_text(*text);
245 if ( !entr->value->compare(_value) ) {
246 settext = entr->guitext;
247 }
248 }
249 if (settext) combo->set_active_text(*settext);
251 combo->show();
252 hbox->pack_start(*combo, true, true);
254 hbox->show();
256 return dynamic_cast<Gtk::Widget *>(hbox);
257 }
260 } /* namespace Extension */
261 } /* namespace Inkscape */