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Viewing changes to mixxx/src/midi/midichanneldelegate.cpp

  • Committer: Varun Jewalikar
  • Date: 2012-05-30 15:45:54 UTC
  • mfrom: (2684.18.247 mixxx-trunk)
  • Revision ID: mr.unwell2006@gmail.com-20120530154554-sh6i8m265v43gqtd
merge with the trunk

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mixxx/src/midi/midichanneldelegate.cpp
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/*
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 * midichanneledelegate.cpp
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 *
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 *  Created on: 1-Feb-2009
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 *      Author: alb
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 */
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#include <QtCore>
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#include <QtGui>
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#include "midichanneldelegate.h"
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MidiChannelDelegate::MidiChannelDelegate(QObject *parent)
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         : QItemDelegate(parent)
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{
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}
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void MidiChannelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
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                         const QModelIndex &index) const
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{
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    if (index.data().canConvert<int>()) {
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        int channel = index.data().value<int>();
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        //Convert to natural numbers (starts at 1 instead of 0.)
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        channel++;
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        if (option.state & QStyle::State_Selected)
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            painter->fillRect(option.rect, option.palette.highlight());
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        QString text = QString("%1").arg(channel);
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        painter->drawText(option.rect, text, QTextOption(Qt::AlignCenter));
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        //Note that Qt::AlignCenter does both vertical and horizontal alignment.
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    } else {
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        QItemDelegate::paint(painter, option, index);
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    }
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}
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QWidget *MidiChannelDelegate::createEditor(QWidget *parent,
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        const QStyleOptionViewItem &/* option */,
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        const QModelIndex &/* index */) const
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{
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    QSpinBox *editor = new QSpinBox(parent);
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    editor->setMinimum(1);
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    editor->setMaximum(16);
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    return editor;
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}
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void MidiChannelDelegate::setEditorData(QWidget *editor,
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                                    const QModelIndex &index) const
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{
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    int channel = index.model()->data(index, Qt::EditRole).toInt();
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    //Convert the channel to natural numbers (1-16). The actual MIDI messages
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    //address them as 0-15 as per the spec, but all user documentation for every
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    //MIDI device on the planet refers to the channels as 1-16.
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    channel++;
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    QSpinBox *spinBox = static_cast<QSpinBox*>(editor);
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    spinBox->setValue(channel);
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}
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void MidiChannelDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
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                                    const QModelIndex &index) const
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{
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    QSpinBox *spinBox = static_cast<QSpinBox*>(editor);
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    spinBox->interpretText();
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    int channel = spinBox->value();
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    channel--; //Convert the MIDI channel back into the 0-15 range.
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    model->setData(index, channel, Qt::EditRole);
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}
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void MidiChannelDelegate::updateEditorGeometry(QWidget *editor,
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                                           const QStyleOptionViewItem &option,
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                                           const QModelIndex &/* index */) const
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{
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    editor->setGeometry(option.rect);
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}