float.cpp revision 0f0f026a553fd84ffaaa90a368f87a842ecfcdd5
/*
* Copyright (C) 2005-2007 Authors:
* Ted Gould <ted@gould.cx>
* Johan Engelen <johan@shouraizou.nl> *
* Jon A. Cruz <jon@joncruz.org>
* 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/scale.h>
#include "ui/widget/spinbutton.h"
#include "xml/node.h"
#include "extension/extension.h"
#include "preferences.h"
#include "float.h"
namespace Inkscape {
namespace Extension {
/** 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,
AppearanceMode mode) :
Parameter(name, guitext, desc, scope, gui_hidden, gui_tip, ext),
_value(0.0), _mode(mode), _indent(0), _min(0.0), _max(10.0)
{
const gchar * defaultval = NULL;
if (xml->firstChild() != NULL) {
defaultval = xml->firstChild()->content();
}
if (defaultval != NULL) {
_value = g_ascii_strtod (defaultval,NULL);
}
const char * maxval = xml->attribute("max");
if (maxval != NULL) {
_max = g_ascii_strtod (maxval,NULL);
}
const char * minval = xml->attribute("min");
if (minval != NULL) {
_min = g_ascii_strtod (minval,NULL);
}
_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;
}
const char * indent = xml->attribute("indent");
if (indent != NULL) {
_indent = atoi(indent) * 12;
}
gchar * pref_name = this->pref_name();
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
_value = prefs->getDouble(extension_pref_root + 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;
}
/**
* A function to set the \c _value.
*
* 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.
*
* @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.
*/
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();
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
prefs->setDouble(extension_pref_root + prefname, _value);
g_free(prefname);
return _value;
}
void ParamFloat::string(std::string &string) const
{
char startstring[G_ASCII_DTOSTR_BUF_SIZE];
g_ascii_dtostr(startstring, G_ASCII_DTOSTR_BUF_SIZE, _value);
string += startstring;
return;
}
/** 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:
/** 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, 1.0, 0), _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 */
/**
* 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;
}
/**
* 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_START));
label->show();
hbox->pack_start(*label, true, true, _indent);
ParamFloatAdjustment * fadjust = Gtk::manage(new ParamFloatAdjustment(this, doc, node, changeSignal));
if (_mode == FULL) {
Gtk::HScale * scale = Gtk::manage(new Gtk::HScale(*fadjust));
scale->set_draw_value(false);
scale->set_size_request(200, -1);
scale->show();
hbox->pack_start(*scale, false, false);
}
Inkscape::UI::Widget::SpinButton * spin = Gtk::manage(new Inkscape::UI::Widget::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 */