1 /*
2 * Copyright (C) 2005-2007 Authors:
3 * Ted Gould <ted@gould.cx>
4 * Johan Engelen <johan@shouraizou.nl> *
5 * Released under GNU GPL, read the file 'COPYING' for more information
6 */
8 #ifdef HAVE_CONFIG_H
9 # include "config.h"
10 #endif
12 #include <gtkmm/adjustment.h>
13 #include <gtkmm/box.h>
14 #include <gtkmm/spinbutton.h>
16 #include <xml/node.h>
18 #include "extension.h"
19 #include "paramfloat.h"
21 namespace Inkscape {
22 namespace Extension {
25 /** \brief Use the superclass' allocator and set the \c _value */
26 ParamFloat::ParamFloat (const gchar * name, const gchar * guitext, const gchar * desc, const Parameter::_scope_t scope, Inkscape::Extension::Extension * ext, Inkscape::XML::Node * xml) :
27 Parameter(name, guitext, desc, scope, ext), _value(0.0), _min(0.0), _max(10.0)
28 {
29 const char * defaultval = NULL;
30 if (sp_repr_children(xml) != NULL)
31 defaultval = sp_repr_children(xml)->content();
32 if (defaultval != NULL) {
33 _value = atof(defaultval);
34 }
36 const char * maxval = xml->attribute("max");
37 if (maxval != NULL)
38 _max = atof(maxval);
40 const char * minval = xml->attribute("min");
41 if (minval != NULL)
42 _min = atof(minval);
44 _precision = 1;
45 const char * precision = xml->attribute("precision");
46 if (precision != NULL)
47 _precision = atoi(precision);
49 /* We're handling this by just killing both values */
50 if (_max < _min) {
51 _max = 10.0;
52 _min = 0.0;
53 }
55 gchar * pref_name = this->pref_name();
56 _value = prefs_get_double_attribute(PREF_DIR, pref_name, _value);
57 g_free(pref_name);
59 // std::cout << "New Float:: value: " << _value << " max: " << _max << " min: " << _min << std::endl;
61 if (_value > _max) _value = _max;
62 if (_value < _min) _value = _min;
64 return;
65 }
67 /** \brief A function to set the \c _value
68 \param in The value to set to
69 \param doc A document that should be used to set the value.
70 \param node The node where the value may be placed
72 This function sets the internal value, but it also sets the value
73 in the preferences structure. To put it in the right place, \c PREF_DIR
74 and \c pref_name() are used.
75 */
76 float
77 ParamFloat::set (float in, SPDocument * doc, Inkscape::XML::Node * node)
78 {
79 _value = in;
80 if (_value > _max) _value = _max;
81 if (_value < _min) _value = _min;
83 gchar * prefname = this->pref_name();
84 prefs_set_double_attribute(PREF_DIR, prefname, _value);
85 g_free(prefname);
87 return _value;
88 }
90 /** \brief Return the value as a string */
91 Glib::ustring *
92 ParamFloat::string (void)
93 {
94 char startstring[G_ASCII_DTOSTR_BUF_SIZE];
95 g_ascii_dtostr(startstring, G_ASCII_DTOSTR_BUF_SIZE, _value);
96 Glib::ustring * mystring = new Glib::ustring(startstring);
97 return mystring;
98 }
100 /** \brief A class to make an adjustment that uses Extension params */
101 class ParamFloatAdjustment : public Gtk::Adjustment {
102 /** The parameter to adjust */
103 ParamFloat * _pref;
104 SPDocument * _doc;
105 Inkscape::XML::Node * _node;
106 sigc::signal<void> * _changeSignal;
107 public:
108 /** \brief Make the adjustment using an extension and the string
109 describing the parameter. */
110 ParamFloatAdjustment (ParamFloat * param, SPDocument * doc, Inkscape::XML::Node * node, sigc::signal<void> * changeSignal) :
111 Gtk::Adjustment(0.0, param->min(), param->max(), 0.1), _pref(param), _doc(doc), _node(node), _changeSignal(changeSignal) {
112 this->set_value(_pref->get(NULL, NULL) /* \todo fix */);
113 this->signal_value_changed().connect(sigc::mem_fun(this, &ParamFloatAdjustment::val_changed));
114 return;
115 };
117 void val_changed (void);
118 }; /* class ParamFloatAdjustment */
120 /** \brief A function to respond to the value_changed signal from the
121 adjustment.
123 This function just grabs the value from the adjustment and writes
124 it to the parameter. Very simple, but yet beautiful.
125 */
126 void
127 ParamFloatAdjustment::val_changed (void)
128 {
129 //std::cout << "Value Changed to: " << this->get_value() << std::endl;
130 _pref->set(this->get_value(), _doc, _node);
131 if (_changeSignal != NULL) {
132 _changeSignal->emit();
133 }
134 return;
135 }
137 /**
138 \brief Creates a Float Adjustment for a float parameter
140 Builds a hbox with a label and a float adjustment in it.
141 */
142 Gtk::Widget *
143 ParamFloat::get_widget (SPDocument * doc, Inkscape::XML::Node * node, sigc::signal<void> * changeSignal)
144 {
145 Gtk::HBox * hbox = Gtk::manage(new Gtk::HBox(false, 4));
147 Gtk::Label * label = Gtk::manage(new Gtk::Label(_(_text), Gtk::ALIGN_LEFT));
148 label->show();
149 hbox->pack_start(*label, true, true);
151 ParamFloatAdjustment * fadjust = Gtk::manage(new ParamFloatAdjustment(this, doc, node, changeSignal));
152 Gtk::SpinButton * spin = Gtk::manage(new Gtk::SpinButton(*fadjust, 0.1, _precision));
153 spin->show();
154 hbox->pack_start(*spin, false, false);
156 hbox->show();
158 return dynamic_cast<Gtk::Widget *>(hbox);
159 }
162 } /* namespace Extension */
163 } /* namespace Inkscape */