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Diffstat (limited to 'src/extension/param/float.cpp')
| -rw-r--r-- | src/extension/param/float.cpp | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/extension/param/float.cpp b/src/extension/param/float.cpp new file mode 100644 index 000000000..1225648d6 --- /dev/null +++ b/src/extension/param/float.cpp @@ -0,0 +1,165 @@ +/* + * Copyright (C) 2005-2007 Authors: + * Ted Gould <ted@gould.cx> + * Johan Engelen <johan@shouraizou.nl> * + * Released under GNU GPL, read the file 'COPYING' for more information + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <gtkmm/adjustment.h> +#include <gtkmm/box.h> +#include <gtkmm/spinbutton.h> + +#include <xml/node.h> + +#include <extension/extension.h> +#include "float.h" + +namespace Inkscape { +namespace Extension { + + +/** \brief Use the superclass' allocator and set the \c _value */ +ParamFloat::ParamFloat (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) : + Parameter(name, guitext, desc, scope, gui_hidden, gui_tip, ext), _value(0.0), _min(0.0), _max(10.0) +{ + const char * defaultval = NULL; + if (sp_repr_children(xml) != NULL) + defaultval = sp_repr_children(xml)->content(); + if (defaultval != NULL) { + _value = atof(defaultval); + } + + const char * maxval = xml->attribute("max"); + if (maxval != NULL) + _max = atof(maxval); + + const char * minval = xml->attribute("min"); + if (minval != NULL) + _min = atof(minval); + + _precision = 1; + const char * precision = xml->attribute("precision"); + if (precision != NULL) + _precision = atoi(precision); + + /* We're handling this by just killing both values */ + if (_max < _min) { + _max = 10.0; + _min = 0.0; + } + + gchar * pref_name = this->pref_name(); + _value = prefs_get_double_attribute(PREF_DIR, pref_name, _value); + g_free(pref_name); + + // std::cout << "New Float:: value: " << _value << " max: " << _max << " min: " << _min << std::endl; + + if (_value > _max) _value = _max; + if (_value < _min) _value = _min; + + return; +} + +/** \brief A function to set the \c _value + \param in The value to set to + \param doc A document that should be used to set the value. + \param node The node where the value may be placed + + This function sets the internal value, but it also sets the value + in the preferences structure. To put it in the right place, \c PREF_DIR + and \c pref_name() are used. +*/ +float +ParamFloat::set (float in, SPDocument * /*doc*/, Inkscape::XML::Node * /*node*/) +{ + _value = in; + if (_value > _max) _value = _max; + if (_value < _min) _value = _min; + + gchar * prefname = this->pref_name(); + prefs_set_double_attribute(PREF_DIR, prefname, _value); + g_free(prefname); + + return _value; +} + +/** \brief Return the value as a string */ +void +ParamFloat::string (std::string &string) +{ + char startstring[G_ASCII_DTOSTR_BUF_SIZE]; + g_ascii_dtostr(startstring, G_ASCII_DTOSTR_BUF_SIZE, _value); + string += startstring; + return; +} + +/** \brief A class to make an adjustment that uses Extension params */ +class ParamFloatAdjustment : public Gtk::Adjustment { + /** The parameter to adjust */ + ParamFloat * _pref; + SPDocument * _doc; + Inkscape::XML::Node * _node; + sigc::signal<void> * _changeSignal; +public: + /** \brief Make the adjustment using an extension and the string + describing the parameter. */ + ParamFloatAdjustment (ParamFloat * param, SPDocument * doc, Inkscape::XML::Node * node, sigc::signal<void> * changeSignal) : + Gtk::Adjustment(0.0, param->min(), param->max(), 0.1), _pref(param), _doc(doc), _node(node), _changeSignal(changeSignal) { + this->set_value(_pref->get(NULL, NULL) /* \todo fix */); + this->signal_value_changed().connect(sigc::mem_fun(this, &ParamFloatAdjustment::val_changed)); + return; + }; + + void val_changed (void); +}; /* class ParamFloatAdjustment */ + +/** \brief A function to respond to the value_changed signal from the + adjustment. + + This function just grabs the value from the adjustment and writes + it to the parameter. Very simple, but yet beautiful. +*/ +void +ParamFloatAdjustment::val_changed (void) +{ + //std::cout << "Value Changed to: " << this->get_value() << std::endl; + _pref->set(this->get_value(), _doc, _node); + if (_changeSignal != NULL) { + _changeSignal->emit(); + } + return; +} + +/** + \brief Creates a Float Adjustment for a float parameter + + Builds a hbox with a label and a float adjustment in it. +*/ +Gtk::Widget * +ParamFloat::get_widget (SPDocument * doc, Inkscape::XML::Node * node, sigc::signal<void> * changeSignal) +{ + if (_gui_hidden) return NULL; + + Gtk::HBox * hbox = Gtk::manage(new Gtk::HBox(false, 4)); + + Gtk::Label * label = Gtk::manage(new Gtk::Label(_(_text), Gtk::ALIGN_LEFT)); + label->show(); + hbox->pack_start(*label, true, true); + + ParamFloatAdjustment * fadjust = Gtk::manage(new ParamFloatAdjustment(this, doc, node, changeSignal)); + Gtk::SpinButton * spin = Gtk::manage(new Gtk::SpinButton(*fadjust, 0.1, _precision)); + spin->show(); + hbox->pack_start(*spin, false, false); + + hbox->show(); + + return dynamic_cast<Gtk::Widget *>(hbox); +} + + +} /* namespace Extension */ +} /* namespace Inkscape */ |