/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the test suite of the Qt Toolkit.

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** This file contains pre-release code and may not be distributed.

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** contained in the Technology Preview License Agreement accompanying

** this package.

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** GNU Lesser General Public License Usage

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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****************************************************************************/

#include "interactivewidget.h"

#include <QtGui/QToolBox>

InteractiveWidget::InteractiveWidget()

{

    m_onScreenWidget = new OnScreenWidget<QWidget>("");

    m_onScreenWidget->setMinimumSize(320, 240);

    setCentralWidget(m_onScreenWidget);

    ui_textEdit = new QTextEdit();

    ui_textEdit->installEventFilter(this);

    QWidget *panelContent = new QWidget();

    QVBoxLayout *vlayout = new QVBoxLayout(panelContent);

    vlayout->setMargin(0);

    vlayout->setSpacing(0);

    // create and populate the command toolbox

    m_commandsToolBox = new QToolBox();

    QListWidget *currentListWidget = 0;

    foreach (PaintCommands::PaintCommandInfos paintCommandInfo, PaintCommands::s_commandInfoTable) {

        if (paintCommandInfo.isSectionHeader()) {

            currentListWidget = new QListWidget();

            m_commandsToolBox->addItem(currentListWidget, QIcon(":/icons/tools.png"), "commands - "+paintCommandInfo.identifier);

            connect(currentListWidget, SIGNAL(itemActivated(QListWidgetItem*)), SLOT(cmdSelected(QListWidgetItem*)));

        } else {

            (new QListWidgetItem(paintCommandInfo.identifier, currentListWidget))->setToolTip(paintCommandInfo.syntax);

        }

    }

    // create and populate the enumerations toolbox

    m_enumsToolBox = new QToolBox();

    typedef QPair<QString,QStringList> EnumListType;

    foreach (EnumListType enumInfos, PaintCommands::s_enumsTable) {

        currentListWidget = new QListWidget();

        m_commandsToolBox->addItem(currentListWidget, QIcon(":/icons/enum.png"), "enums - "+enumInfos.first);

        connect(currentListWidget, SIGNAL(itemActivated(QListWidgetItem*)), SLOT(enumSelected(QListWidgetItem*)));

        foreach (QString enumItem, enumInfos.second)

            new QListWidgetItem(enumItem, currentListWidget);

    }

    // add other widgets and layout

    vlayout->addWidget(m_commandsToolBox);

    vlayout->addWidget(m_enumsToolBox);

    QPushButton *run = new QPushButton("&Run");

    QPushButton *load = new QPushButton("&Load");

    QPushButton *save = new QPushButton("&Save");

    run->setFocusPolicy(Qt::NoFocus);

    vlayout->addSpacing(20);

    vlayout->addWidget(run);

    vlayout->addWidget(load);

    vlayout->addWidget(save);

    QDockWidget *panel = new QDockWidget("Commands");

    panel->setWidget(panelContent);

    addDockWidget(Qt::LeftDockWidgetArea, panel);

    QDockWidget *editor = new QDockWidget("Editor");

    editor->setWidget(ui_textEdit);

    addDockWidget(Qt::RightDockWidgetArea, editor);

    // connect gui signals

    connect(run, SIGNAL(clicked()), SLOT(run()));

    connect(load, SIGNAL(clicked()), SLOT(load()));

    connect(save, SIGNAL(clicked()), SLOT(save()));

}

/***************************************************************************************************/

void InteractiveWidget::run()

{

    m_onScreenWidget->m_commands.clear();

    QString script = ui_textEdit->toPlainText();

    QStringList lines = script.split("\n");

    for (int i = 0; i < lines.size(); ++i)

        m_onScreenWidget->m_commands.append(lines.at(i));

    m_onScreenWidget->repaint();

}

/***************************************************************************************************/

void InteractiveWidget::cmdSelected(QListWidgetItem *item)

{

    if (ui_textEdit->textCursor().atBlockStart()) {

        ui_textEdit->insertPlainText(PaintCommands::findCommandById(item->text())->sample + "\n");

    } else {

        ui_textEdit->moveCursor(QTextCursor::EndOfLine);

        ui_textEdit->insertPlainText("\n" + PaintCommands::findCommandById(item->text())->sample);

    }

    ui_textEdit->setFocus();

}

/***************************************************************************************************/

void InteractiveWidget::enumSelected(QListWidgetItem *item)

{

    ui_textEdit->insertPlainText(item->text());

    ui_textEdit->setFocus();

}

/***************************************************************************************************/

void InteractiveWidget::load()

{

    QString fname = QFileDialog::getOpenFileName(

        this,

        QString("Load QPaintEngine Script"),

        QFileInfo(m_filename).absoluteFilePath(),

        QString("QPaintEngine Script (*.qps);;All files (*.*)"));

    load(fname);

}

/***************************************************************************************************/

void InteractiveWidget::load(const QString &fname)

{

    if (!fname.isEmpty()) {

        m_filename = fname;

        ui_textEdit->clear();

        QFile file(fname);

        file.open(QIODevice::ReadOnly | QIODevice::Text);

        QTextStream textFile(&file);

        QString script = textFile.readAll();

        ui_textEdit->setPlainText(script);

        m_onScreenWidget->m_filename = fname;

    }

}

/***************************************************************************************************/

void InteractiveWidget::save()

{

    QString script = ui_textEdit->toPlainText();

    if (!script.endsWith("\n"))

        script += QString("\n");

    QString fname = QFileDialog::getSaveFileName(this,

                            QString("Save QPaintEngine Script"),

                            QFileInfo(m_filename).absoluteFilePath(),

                            QString("QPaintEngine Script (*.qps);;All files (*.*)"));

    if (!fname.isEmpty()) {

        m_filename = fname;

        QFile file(fname);

        file.open(QIODevice::WriteOnly | QIODevice::Truncate | QIODevice::Text);

        QTextStream textFile(&file);

        textFile << script;

        m_onScreenWidget->m_filename = fname;

    }

}

/***************************************************************************************************/

bool InteractiveWidget::eventFilter(QObject *o, QEvent *e)

{

    if (qobject_cast<QTextEdit *>(o) && e->type() == QEvent::KeyPress) {

        QKeyEvent *ke = static_cast<QKeyEvent *>(e);

        if (ke->key() == Qt::Key_Tab) {

            m_commandsToolBox->currentWidget()->setFocus();

            return true;

        } else if (ke->key() == Qt::Key_Return && ke->modifiers() == Qt::ControlModifier) {

            run();

            return true;

        }

    }

    return false;

}