extension/param/int.cpp

	int.cpp revision 081364debe4793081bf3f50cb82ca7d0999a41d4
/*
 * 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 "int.h"

namespace Inkscape {
namespace Extension {


/** Use the superclass' allocator and set the \c _value. */
ParamInt::ParamInt (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), _mode(mode), _indent(0), _min(0), _max(10)
{
    const char * defaultval = NULL;
    if (sp_repr_children(xml) != NULL) {
        defaultval = sp_repr_children(xml)->content();
    }
    if (defaultval != NULL) {
        _value = atoi(defaultval);
    }

    const char * maxval = xml->attribute("max");
    if (maxval != NULL) {
        _max = atoi(maxval);
    }

    const char * minval = xml->attribute("min");
    if (minval != NULL) {
        _min = atoi(minval);
    }
    /* We're handling this by just killing both values */
    if (_max < _min) {
        _max = 10;
        _min = 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->getInt(extension_pref_root + pref_name, _value);
    g_free(pref_name);

    // std::cout << "New Int::  value: " << _value << "  max: " << _max << "  min: " << _min << std::endl;

    if (_value > _max) {
        _value = _max;
    }
    if (_value < _min) {
        _value = _min;
    }
}

/**
 * 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.
 */
int ParamInt::set(int 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->setInt(extension_pref_root + prefname, _value);
    g_free(prefname);

    return _value;
}

/** A class to make an adjustment that uses Extension params. */
class ParamIntAdjustment : public Gtk::Adjustment {
    /** The parameter to adjust. */
    ParamInt * _pref;
    SPDocument * _doc;
    Inkscape::XML::Node * _node;
    sigc::signal<void> * _changeSignal;
public:
    /** Make the adjustment using an extension and the string
        describing the parameter. */
    ParamIntAdjustment (ParamInt * param, SPDocument * doc, Inkscape::XML::Node * node, sigc::signal<void> * changeSignal) :
            Gtk::Adjustment(0.0, param->min(), param->max(), 1.0, 10.0, 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, &ParamIntAdjustment::val_changed));
    };

    void val_changed (void);
}; /* class ParamIntAdjustment */

/**
 * 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 ParamIntAdjustment::val_changed(void)
{
    //std::cout << "Value Changed to: " << this->get_value() << std::endl;
    _pref->set((int)this->get_value(), _doc, _node);
    if (_changeSignal != NULL) {
        _changeSignal->emit();
    }
}

/**
 * Creates a Int Adjustment for a int parameter.
 *
 * Builds a hbox with a label and a int adjustment in it.
 */
Gtk::Widget *
ParamInt::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, _indent);

    ParamIntAdjustment * fadjust = Gtk::manage(new ParamIntAdjustment(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, 1.0, 0));
    spin->show();
    hbox->pack_start(*spin, false, false);

    hbox->show();

    return dynamic_cast<Gtk::Widget *>(hbox);
}

void ParamInt::string(std::string &string) const
{
    char startstring[32];
    sprintf(startstring, "%d", _value);
    string += startstring;
}

}  // namespace Extension
}  // namespace Inkscape

/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :