transform_dialog.cc

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/*
   Copyright (C) 2009-2014 Paul Davis
   Author: David Robillard

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <gtkmm/box.h>
#include <gtkmm/label.h>
#include <gtkmm/stock.h>

#include "transform_dialog.h"

#include "i18n.h"

using namespace std;
using namespace Gtk;
using namespace ARDOUR;

TransformDialog::Model::Model()
        : source_list(Gtk::ListStore::create(source_cols))
        , property_list(Gtk::ListStore::create(property_cols))
        , operator_list(Gtk::ListStore::create(operator_cols))
{
        static const char* source_labels[] = {
                /* no NOTHING */
                _("this note's"),
                _("the previous note's"),
                _("this note's index"),
                _("the number of notes"),
                _("exactly"),
                _("a random number from"),
                NULL
        };
        for (int s = 0; source_labels[s]; ++s) {
                Gtk::TreeModel::Row row = *(source_list->append());
                row[source_cols.source] = (Source)(s + 1);  // Skip NOTHING
                row[source_cols.label]  = source_labels[s];
        }
        // Special row for ramp, which doesn't correspond to a source
        Gtk::TreeModel::Row row = *(source_list->append());
        row[source_cols.source] = Value::NOWHERE;
        row[source_cols.label]  = _("equal steps from");

        static const char* property_labels[] = {
                _("note number"),
                _("velocity"),
                _("start time"),
                _("length"),
                _("channel"),
                NULL
        };
        for (int p = 0; property_labels[p]; ++p) {
                Gtk::TreeModel::Row row = *(property_list->append());
                row[property_cols.property] = (Property)p;
                row[property_cols.label]    = property_labels[p];
        }

        static const char* operator_labels[] = {
                /* no PUSH */ "+", "-", "*", "/", "mod", NULL
        };
        for (int o = 0; operator_labels[o]; ++o) {
                Gtk::TreeModel::Row row = *(operator_list->append());
                row[operator_cols.op]    = (Operator)(o + 1);  // Skip PUSH
                row[operator_cols.label] = operator_labels[o];
        }
}

TransformDialog::TransformDialog()
        : ArdourDialog(_("Transform"), false, false)
{
        _property_combo.set_model(_model.property_list);
        _property_combo.pack_start(_model.property_cols.label);
        _property_combo.set_active(1);
        _property_combo.signal_changed().connect(
                sigc::mem_fun(this, &TransformDialog::property_changed));

        Gtk::HBox* property_hbox = Gtk::manage(new Gtk::HBox);
        property_hbox->pack_start(*Gtk::manage(new Gtk::Label(_("Set "))), false, false);
        property_hbox->pack_start(_property_combo, false, false);
        property_hbox->pack_start(*Gtk::manage(new Gtk::Label(_(" to "))), false, false);

        _seed_chooser = Gtk::manage(new ValueChooser(_model));
        _seed_chooser->set_target_property(MidiModel::NoteDiffCommand::Velocity);
        _seed_chooser->source_combo.set_active(0);
        property_hbox->pack_start(*_seed_chooser, false, false);

        Gtk::HBox* add_hbox = Gtk::manage(new Gtk::HBox);
        _add_button.add(
                *manage(new Gtk::Image(Gtk::Stock::ADD, Gtk::ICON_SIZE_BUTTON)));
        add_hbox->pack_start(_add_button, false, false);
        _add_button.signal_clicked().connect(
                sigc::mem_fun(*this, &TransformDialog::add_clicked));

        get_vbox()->set_spacing(6);
        get_vbox()->pack_start(*property_hbox, false, false);
        get_vbox()->pack_start(_operations_box, false, false);
        get_vbox()->pack_start(*add_hbox, false, false);

        add_button(Stock::CANCEL, Gtk::RESPONSE_CANCEL);
        add_button(_("Transform"), Gtk::RESPONSE_OK);

        show_all();
        _seed_chooser->value_spinner.hide();
}

TransformDialog::ValueChooser::ValueChooser(const Model& model)
        : model(model)
        , target_property((Property)1)
        , to_label(" to ")
{
        source_combo.set_model(model.source_list);
        source_combo.pack_start(model.source_cols.label);
        source_combo.signal_changed().connect(
                sigc::mem_fun(this, &TransformDialog::ValueChooser::source_changed));

        property_combo.set_model(model.property_list);
        property_combo.pack_start(model.property_cols.label);

        set_spacing(4);
        pack_start(source_combo, false, false);
        pack_start(property_combo, false, false);
        pack_start(value_spinner, false, false);
        pack_start(to_label, false, false);
        pack_start(max_spinner, false, false);
        show_all();

        source_combo.set_active(4);
        property_combo.set_active(1);
        set_target_property(MidiModel::NoteDiffCommand::Velocity);
        max_spinner.set_value(127);
        source_changed();
}

static void
set_spinner_for(Gtk::SpinButton&                     spinner,
                MidiModel::NoteDiffCommand::Property prop)
{
        switch (prop) {
        case MidiModel::NoteDiffCommand::NoteNumber:
        case MidiModel::NoteDiffCommand::Velocity:
                spinner.get_adjustment()->set_lower(1); // no 0, note off
                spinner.get_adjustment()->set_upper(127);
                spinner.get_adjustment()->set_step_increment(1);
                spinner.get_adjustment()->set_page_increment(10);
                spinner.set_digits(0);
                break;
        case MidiModel::NoteDiffCommand::StartTime:
                spinner.get_adjustment()->set_lower(0);
                spinner.get_adjustment()->set_upper(1024);
                spinner.get_adjustment()->set_step_increment(0.125);
                spinner.get_adjustment()->set_page_increment(1.0);
                spinner.set_digits(2);
                break;
        case MidiModel::NoteDiffCommand::Length:
                spinner.get_adjustment()->set_lower(1.0 / 64.0);
                spinner.get_adjustment()->set_upper(32);
                spinner.get_adjustment()->set_step_increment(1.0 / 64.0);
                spinner.get_adjustment()->set_page_increment(1.0);
                spinner.set_digits(2);
                break;
        case MidiModel::NoteDiffCommand::Channel:
                spinner.get_adjustment()->set_lower(0);
                spinner.get_adjustment()->set_upper(15);
                spinner.get_adjustment()->set_step_increment(1);
                spinner.get_adjustment()->set_page_increment(10);
                spinner.set_digits(0);
                break;
        }
        spinner.set_value(
                std::min(spinner.get_adjustment()->get_upper(),
                         std::max(spinner.get_adjustment()->get_lower(), spinner.get_value())));
}

void
TransformDialog::ValueChooser::set_target_property(Property prop)
{
        target_property = prop;
        set_spinner_for(value_spinner, prop);
        set_spinner_for(max_spinner, prop);
}

void
TransformDialog::ValueChooser::source_changed()
{
        Gtk::TreeModel::const_iterator s      = source_combo.get_active();
        const Source                   source = (*s)[model.source_cols.source];

        value_spinner.hide();
        to_label.hide();
        max_spinner.hide();
        if (source == Value::LITERAL) {
                value_spinner.show();
                property_combo.hide();
        } else if (source == Value::RANDOM) {
                value_spinner.show();
                to_label.show();
                max_spinner.show();
                property_combo.hide();
        } else if (source == Value::NOWHERE) {
                /* Bit of a kludge, hijack this for ramps since it's the only thing
                   that doesn't correspond to a source.  When we add more fancy
                   code-generating value chooser options, the column model will need to
                   be changed a bit to reflect this. */
                value_spinner.show();
                to_label.show();
                max_spinner.show();
                property_combo.hide();
        } else if (source == Value::INDEX || source == Value::N_NOTES) {
                value_spinner.hide();
                property_combo.hide();
        } else {
                value_spinner.hide();
                property_combo.show();
        }
}

void
TransformDialog::ValueChooser::get(std::list<Operation>& ops)
{
        Gtk::TreeModel::const_iterator s      = source_combo.get_active();
        const Source                   source = (*s)[model.source_cols.source];

        if (source == Transform::Value::RANDOM) {
                /* Special case: a RANDOM value is always 0..1, so here we produce some
                   code to produce a random number in a range: "rand value *". */
                const double a     = value_spinner.get_value();
                const double b     = max_spinner.get_value();
                const double min   = std::min(a, b);
                const double max   = std::max(a, b);
                const double range = max - min;

                // "rand range * min +" ((rand * range) + min)
                ops.push_back(Operation(Operation::PUSH, Value(Value::RANDOM)));
                ops.push_back(Operation(Operation::PUSH, Value(range)));
                ops.push_back(Operation(Operation::MULT));
                ops.push_back(Operation(Operation::PUSH, Value(min)));
                ops.push_back(Operation(Operation::ADD));
                return;
        } else if (source == Transform::Value::NOWHERE) {
                /* Special case: hijack NOWHERE for ramps (see above).  The language
                   knows nothing of ramps, we generate code to calculate the
                   appropriate value here. */
                const double first = value_spinner.get_value();
                const double last  = max_spinner.get_value();
                const double rise  = last - first;

                // "index rise * n_notes 1 - / first +" (index * rise / (n_notes - 1) + first)
                ops.push_back(Operation(Operation::PUSH, Value(Value::INDEX)));
                ops.push_back(Operation(Operation::PUSH, Value(rise)));
                ops.push_back(Operation(Operation::MULT));
                ops.push_back(Operation(Operation::PUSH, Value(Value::N_NOTES)));
                ops.push_back(Operation(Operation::PUSH, Value(1)));
                ops.push_back(Operation(Operation::SUB));
                ops.push_back(Operation(Operation::DIV));
                ops.push_back(Operation(Operation::PUSH, Value(first)));
                ops.push_back(Operation(Operation::ADD));
                return;
        }

        // Produce a simple Value
        Value val((*s)[model.source_cols.source]);
        if (val.source == Transform::Value::THIS_NOTE ||
            val.source == Transform::Value::PREV_NOTE) {
                Gtk::TreeModel::const_iterator p = property_combo.get_active();
                val.prop = (*p)[model.property_cols.property];
        } else if (val.source == Transform::Value::LITERAL) {
                val.value = Variant(
                        MidiModel::NoteDiffCommand::value_type(target_property),
                        value_spinner.get_value());
        }
        ops.push_back(Operation(Operation::PUSH, val));
}

TransformDialog::OperationChooser::OperationChooser(const Model& model)
        : model(model)
        , value_chooser(model)
{
        operator_combo.set_model(model.operator_list);
        operator_combo.pack_start(model.operator_cols.label);
        operator_combo.set_active(0);

        pack_start(operator_combo, false, false);
        pack_start(value_chooser, false, false);
        pack_start(*Gtk::manage(new Gtk::Label(" ")), true, true);
        pack_start(remove_button, false, false);

        remove_button.add(
                *manage(new Gtk::Image(Gtk::Stock::REMOVE, Gtk::ICON_SIZE_BUTTON)));

        remove_button.signal_clicked().connect(
                sigc::mem_fun(*this, &TransformDialog::OperationChooser::remove_clicked));

        value_chooser.source_combo.set_active(0);

        show_all();
        value_chooser.property_combo.hide();
        value_chooser.value_spinner.set_value(1);
}

void
TransformDialog::OperationChooser::get(std::list<Operation>& ops)
{
        Gtk::TreeModel::const_iterator o = operator_combo.get_active();

        value_chooser.get(ops);
        ops.push_back(Operation((*o)[model.operator_cols.op]));
}

void
TransformDialog::OperationChooser::remove_clicked()
{
        delete this;
}

Transform::Program
TransformDialog::get()
{
        Transform::Program prog;

        // Set target property
        prog.prop = (*_property_combo.get_active())[_model.property_cols.property];

        // Append code to push seed to stack
        _seed_chooser->get(prog.ops);

        // Append all operations' code to program
        const std::vector<Gtk::Widget*>& choosers = _operations_box.get_children();
        for (std::vector<Gtk::Widget*>::const_iterator o = choosers.begin();
             o != choosers.end(); ++o) {
                OperationChooser* chooser = dynamic_cast<OperationChooser*>(*o);
                if (chooser) {
                        chooser->get(prog.ops);
                }
        }

        return prog;
}

void
TransformDialog::property_changed()
{
        Gtk::TreeModel::const_iterator i = _property_combo.get_active();
        _seed_chooser->set_target_property((*i)[_model.property_cols.property]);
}

void
TransformDialog::add_clicked()
{
        _operations_box.pack_start(
                *Gtk::manage(new OperationChooser(_model)), false, false);
}