trunk/src/qsamplerMainForm.ui.h

// qsamplerMainForm.ui.h
//
// ui.h extension file, included from the uic-generated form implementation.
/****************************************************************************
   Copyright (C) 2004, rncbc aka Rui Nuno Capela. All rights reserved.

   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

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

#include <qapplication.h>
#include <qeventloop.h>
#include <qworkspace.h>
#include <qprocess.h>
#include <qmessagebox.h>
#include <qdragobject.h>
#include <qfiledialog.h>
#include <qfileinfo.h>
#include <qfile.h>
#include <qtextstream.h>
#include <qstatusbar.h>
#include <qlabel.h>
#include <qtimer.h>

#include "qsamplerAbout.h"
#include "qsamplerOptions.h"
#include "qsamplerChannel.h"
#include "qsamplerMessages.h"

#include "qsamplerChannelStrip.h"
#include "qsamplerOptionsForm.h"

#include "config.h"


// Timer constant stuff.
#define QSAMPLER_TIMER_MSECS    200

// Status bar item indexes
#define QSAMPLER_STATUS_CLIENT  0       // Client connection state.
#define QSAMPLER_STATUS_SERVER  1       // Currenr server address (host:port)
#define QSAMPLER_STATUS_CHANNEL 2       // Active channel caption.
#define QSAMPLER_STATUS_SESSION 3       // Current session modification state.


// All winsock apps needs this.
#if defined(WIN32)
static WSADATA _wsaData;
#endif


//-------------------------------------------------------------------------
// qsamplerCustomEvent -- specialty for callback comunication.

#define QSAMPLER_CUSTOM_EVENT   1000

class qsamplerCustomEvent : public QCustomEvent
{
public:

    // Constructor.
    qsamplerCustomEvent(lscp_event_t event, const char *pchData, int cchData)
        : QCustomEvent(QSAMPLER_CUSTOM_EVENT)
    {
        m_event = event;
        m_data.setLatin1(pchData, cchData);
    }

    // Accessors.
    lscp_event_t event() { return m_event; }
    QString&     data()  { return m_data;  }

private:

    // The proper event type.
    lscp_event_t m_event;
    // The event data as a string.
    QString      m_data;
};


//-------------------------------------------------------------------------
// qsamplerMainForm -- Main window form implementation.

// Kind of constructor.
void qsamplerMainForm::init (void)
{
    // Initialize some pointer references.
    m_pOptions = NULL;

    // All child forms are to be created later, not earlier than setup.
    m_pMessages = NULL;

    // We'll start clean.
    m_iUntitled = 0;
    m_iDirtyCount = 0;

    m_pServer = NULL;
    m_pClient = NULL;

    m_iStartDelay = 0;
    m_iTimerDelay = 0;

    m_iTimerSlot = 0;

    // Make it an MDI workspace.
    m_pWorkspace = new QWorkspace(this);
    m_pWorkspace->setScrollBarsEnabled(true);
    // Set the activation connection.
    QObject::connect(m_pWorkspace, SIGNAL(windowActivated(QWidget *)), this, SLOT(stabilizeForm()));
    // Make it shine :-)
    setCentralWidget(m_pWorkspace);

    // Create some statusbar labels...
    QLabel *pLabel;
    // Client status.
    pLabel = new QLabel(tr("Connected"), this);
    pLabel->setAlignment(Qt::AlignLeft);
    pLabel->setMinimumSize(pLabel->sizeHint());
    m_status[QSAMPLER_STATUS_CLIENT] = pLabel;
    statusBar()->addWidget(pLabel);
    // Server address.
    pLabel = new QLabel(this);
    pLabel->setAlignment(Qt::AlignLeft);
    m_status[QSAMPLER_STATUS_SERVER] = pLabel;
    statusBar()->addWidget(pLabel, 1);
    // Channel title.
    pLabel = new QLabel(this);
    pLabel->setAlignment(Qt::AlignLeft);
    m_status[QSAMPLER_STATUS_CHANNEL] = pLabel;
    statusBar()->addWidget(pLabel, 2);
    // Session modification status.
    pLabel = new QLabel(tr("MOD"), this);
    pLabel->setAlignment(Qt::AlignHCenter);
    pLabel->setMinimumSize(pLabel->sizeHint());
    m_status[QSAMPLER_STATUS_SESSION] = pLabel;
    statusBar()->addWidget(pLabel);

    // Create the recent files sub-menu.
    m_pRecentFilesMenu = new QPopupMenu(this);
    fileMenu->insertSeparator(4);
    fileMenu->insertItem(tr("Recent &Files"), m_pRecentFilesMenu, 0, 5);

#if defined(WIN32)
    WSAStartup(MAKEWORD(1, 1), &_wsaData);
#endif
}


// Kind of destructor.
void qsamplerMainForm::destroy (void)
{
    // Do final processing anyway.
    processServerExit();
    
    // Delete recentfiles menu.
    if (m_pRecentFilesMenu)
        delete m_pRecentFilesMenu;
    // Delete status item labels one by one.
    if (m_status[QSAMPLER_STATUS_CLIENT])
        delete m_status[QSAMPLER_STATUS_CLIENT];
    if (m_status[QSAMPLER_STATUS_SERVER])
        delete m_status[QSAMPLER_STATUS_SERVER];
    if (m_status[QSAMPLER_STATUS_CHANNEL])
        delete m_status[QSAMPLER_STATUS_CHANNEL];
    if (m_status[QSAMPLER_STATUS_SESSION])
        delete m_status[QSAMPLER_STATUS_SESSION];

    // Finally drop any widgets around...
    if (m_pMessages)
        delete m_pMessages;
    if (m_pWorkspace)
        delete m_pWorkspace;

#if defined(WIN32)
    WSACleanup();
#endif
}


// Make and set a proper setup options step.
void qsamplerMainForm::setup ( qsamplerOptions *pOptions )
{
    // We got options?
    m_pOptions = pOptions;

    // Some child forms are to be created right now.
    m_pMessages = new qsamplerMessages(this);
    // Set message defaults...
    updateMessagesFont();
    updateMessagesLimit();
    updateMessagesCapture();
    // Set the visibility signal.
    QObject::connect(m_pMessages, SIGNAL(visibilityChanged(bool)), this, SLOT(stabilizeForm()));

    // Initial decorations toggle state.
    viewMenubarAction->setOn(m_pOptions->bMenubar);
    viewToolbarAction->setOn(m_pOptions->bToolbar);
    viewStatusbarAction->setOn(m_pOptions->bStatusbar);
    channelsAutoArrangeAction->setOn(m_pOptions->bAutoArrange);

    // Initial decorations visibility state.
    viewMenubar(m_pOptions->bMenubar);
    viewToolbar(m_pOptions->bToolbar);
    viewStatusbar(m_pOptions->bStatusbar);

    // Restore whole dock windows state.
    QString sDockables = m_pOptions->settings().readEntry("/Layout/DockWindows" , QString::null);
    if (sDockables.isEmpty()) {
        // Message window is forced to dock on the bottom.
        moveDockWindow(m_pMessages, Qt::DockBottom);
    } else {
        // Make it as the last time.
        QTextIStream istr(&sDockables);
        istr >> *this;
    }
    // Try to restore old window positioning.
    m_pOptions->loadWidgetGeometry(this);

    // Final startup stabilization...
    updateRecentFilesMenu();
    stabilizeForm();

    // Make it ready :-)
    statusBar()->message(tr("Ready"), 3000);

    // We'll try to start immediately...
    startSchedule(0);

    // Register the first timer slot.
    QTimer::singleShot(QSAMPLER_TIMER_MSECS, this, SLOT(timerSlot()));
}


// Window close event handlers.
bool qsamplerMainForm::queryClose (void)
{
    bool bQueryClose = closeSession(false);

    // Try to save current general state...
    if (m_pOptions) {
        // Some windows default fonts is here on demand too.
        if (bQueryClose && m_pMessages)
            m_pOptions->sMessagesFont = m_pMessages->messagesFont().toString();
        // Try to save current positioning.
        if (bQueryClose) {
            // Save decorations state.
            m_pOptions->bMenubar = MenuBar->isVisible();
            m_pOptions->bToolbar = (fileToolbar->isVisible() || editToolbar->isVisible() || channelsToolbar->isVisible());
            m_pOptions->bStatusbar = statusBar()->isVisible();
            // Save the dock windows state.
            QString sDockables;
            QTextOStream ostr(&sDockables);
            ostr << *this;
            m_pOptions->settings().writeEntry("/Layout/DockWindows", sDockables);
            // And the main windows state.
            m_pOptions->saveWidgetGeometry(this);
            // Stop client and/or server, gracefully.
            stopServer();
        }
    }

    return bQueryClose;
}


void qsamplerMainForm::closeEvent ( QCloseEvent *pCloseEvent )
{
    if (queryClose())
        pCloseEvent->accept();
    else
        pCloseEvent->ignore();
}


// Window drag-n-drop event handlers.
void qsamplerMainForm::dragEnterEvent ( QDragEnterEvent* pDragEnterEvent )
{
    bool bAccept = false;

    if (QTextDrag::canDecode(pDragEnterEvent)) {
        QString sUrl;
        if (QTextDrag::decode(pDragEnterEvent, sUrl) && m_pClient)
            bAccept = QFileInfo(QUrl(sUrl).path()).exists();
    }

    pDragEnterEvent->accept(bAccept);
}


void qsamplerMainForm::dropEvent ( QDropEvent* pDropEvent )
{
    if (QTextDrag::canDecode(pDropEvent)) {
        QString sUrl;
        if (QTextDrag::decode(pDropEvent, sUrl) && closeSession(true))
            loadSessionFile(QUrl(sUrl).path());
    }
}


// Custome event handler.
void qsamplerMainForm::customEvent ( QCustomEvent *pCustomEvent )
{
    // For the time being, just pump it to messages.
    if (pCustomEvent->type() == QSAMPLER_CUSTOM_EVENT) {
        qsamplerCustomEvent *pEvent = (qsamplerCustomEvent *) pCustomEvent;
        appendMessagesColor(tr("Notify event: %1 data: %2")
            .arg(::lscp_event_to_text(pEvent->event()))
            .arg(pEvent->data()), "#996699"); 
    }
}


// Context menu event handler.
void qsamplerMainForm::contextMenuEvent( QContextMenuEvent *pEvent )
{
    stabilizeForm();
    
    editMenu->exec(pEvent->globalPos());
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- Brainless public property accessors.

// The global options settings property.
qsamplerOptions *qsamplerMainForm::options (void)
{
    return m_pOptions;
}

// The LSCP client descriptor property.
lscp_client_t *qsamplerMainForm::client (void)
{
    return m_pClient;
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- Session file stuff.

// Format the displayable session filename.
QString qsamplerMainForm::sessionName ( const QString& sFilename )
{
    bool bCompletePath = (m_pOptions && m_pOptions->bCompletePath);
    QString sSessionName = sFilename;
    if (sSessionName.isEmpty())
        sSessionName = tr("Untitled") + QString::number(m_iUntitled);
    else if (!bCompletePath)
        sSessionName = QFileInfo(sSessionName).fileName();
    return sSessionName;
}


// Create a new session file from scratch.
bool qsamplerMainForm::newSession (void)
{
    // Check if we can do it.
    if (!closeSession(true))
        return false;

    // Ok increment untitled count.
    m_iUntitled++;

    // Stabilize form.
    m_sFilename = QString::null;
    m_iDirtyCount = 0;
    appendMessages(tr("New session: \"%1\".").arg(sessionName(m_sFilename)));
    stabilizeForm();

    return true;
}


// Open an existing sampler session.
bool qsamplerMainForm::openSession (void)
{
    if (m_pOptions == NULL)
        return false;

    // Ask for the filename to open...
    QString sFilename = QFileDialog::getOpenFileName(
            m_pOptions->sSessionDir,                // Start here.
            tr("LSCP Session files") + " (*.lscp)", // Filter (LSCP files)
            this, 0,                                // Parent and name (none)
            tr("Open Session")                      // Caption.
    );

    // Have we cancelled?
    if (sFilename.isEmpty())
        return false;

    // Check if we're going to discard safely the current one...
    if (!closeSession(true))
        return false;

    // Load it right away.
    return loadSessionFile(sFilename);
}


// Save current sampler session with another name.
bool qsamplerMainForm::saveSession ( bool bPrompt )
{
    if (m_pOptions == NULL)
        return false;

    QString sFilename = m_sFilename;

    // Ask for the file to save, if there's none...
    if (bPrompt || sFilename.isEmpty()) {
        // If none is given, assume default directory.
        if (sFilename.isEmpty())
            sFilename = m_pOptions->sSessionDir;
        // Prompt the guy...
        sFilename = QFileDialog::getSaveFileName(
                sFilename,                              // Start here.
                tr("LSCP Session files") + " (*.lscp)", // Filter (LSCP files)
                this, 0,                                // Parent and name (none)
                tr("Save Session")                      // Caption.
        );
        // Have we cancelled it?
        if (sFilename.isEmpty())
            return false;
        // Enforce .lscp extension...
        if (QFileInfo(sFilename).extension().isEmpty())
            sFilename += ".lscp";
        // Check if already exists...
        if (sFilename != m_sFilename && QFileInfo(sFilename).exists()) {
            if (QMessageBox::warning(this, tr("Warning"),
                tr("The file already exists:\n\n"
                   "\"%1\"\n\n"
                   "Do you want to replace it?")
                   .arg(sFilename),
                tr("Replace"), tr("Cancel")) > 0)
                return false;
        }
    }

    // Save it right away.
    return saveSessionFile(sFilename);
}


// Close current session.
bool qsamplerMainForm::closeSession ( bool bForce )
{
    bool bClose = true;

    // Are we dirty enough to prompt it?
    if (m_iDirtyCount > 0) {
        switch (QMessageBox::warning(this, tr("Warning"),
            tr("The current session has been changed:\n\n"
            "\"%1\"\n\n"
            "Do you want to save the changes?")
            .arg(sessionName(m_sFilename)),
            tr("Save"), tr("Discard"), tr("Cancel"))) {
        case 0:     // Save...
            bClose = saveSession(false);
            // Fall thru....
        case 1:     // Discard
            break;
        default:    // Cancel.
            bClose = false;
            break;
        }
    }

    // If we may close it, dot it.
    if (bClose) {
        // Remove all channel strips from sight...
        m_pWorkspace->setUpdatesEnabled(false);
        QWidgetList wlist = m_pWorkspace->windowList();
        for (int iChannel = 0; iChannel < (int) wlist.count(); iChannel++) {
            qsamplerChannelStrip *pChannelStrip = (qsamplerChannelStrip *) wlist.at(iChannel);
            if (pChannelStrip) {
                qsamplerChannel *pChannel = pChannelStrip->channel();
                if (bForce && pChannel && ::lscp_remove_channel(m_pClient, pChannel->channelID()) != LSCP_OK)
                    appendMessagesClient("lscp_remove_channel");
                delete pChannelStrip;
            }
        }
        m_pWorkspace->setUpdatesEnabled(true);
        // We're now clean, for sure.
        m_iDirtyCount = 0;
    }

    return bClose;
}


// Load a session from specific file path.
bool qsamplerMainForm::loadSessionFile ( const QString& sFilename )
{
    if (m_pClient == NULL)
        return false;

    // Open and read from real file.
    QFile file(sFilename);
    if (!file.open(IO_ReadOnly)) {
        appendMessagesError(tr("Could not open \"%1\" session file.\n\nSorry.").arg(sFilename));
        return false;
    }

    // Read the file.
    int iErrors = 0;
    QTextStream ts(&file);
    while (!ts.atEnd()) {
        // Read the line.
        QString sCommand = ts.readLine().simplifyWhiteSpace();
        // If not empty, nor a comment, call the server...
        if (!sCommand.isEmpty() && sCommand[0] != '#') {
            appendMessagesColor(sCommand, "#996633");
            // Remember that, no matter what,
            // all LSCP commands are CR/LF terminated.
            sCommand += "\r\n";
            if (::lscp_client_query(m_pClient, sCommand.latin1()) != LSCP_OK) {
                appendMessagesClient("lscp_client_query");
                iErrors++;
            }
        }
        // Try to make it snappy :)
        QApplication::eventLoop()->processEvents(QEventLoop::ExcludeUserInput);
    }

    // Ok. we've read it.
    file.close();

    // Have we any errors?
    if (iErrors > 0)
        appendMessagesError(tr("Some setttings could not be loaded\nfrom \"%1\" session file.\n\nSorry.").arg(sFilename));

    // Now we'll try to create the whole GUI session.
    int iChannels = ::lscp_get_channels(m_pClient);
    if (iChannels < 0) {
        appendMessagesClient("lscp_get_channels");
        appendMessagesError(tr("Could not get current number of channels.\n\nSorry."));
    }
    
    // Try to (re)create each channel.
    m_pWorkspace->setUpdatesEnabled(false);
    for (int iChannelID = 0; iChannelID < iChannels; iChannelID++) {
        createChannel(iChannelID, false);
        QApplication::eventLoop()->processEvents(QEventLoop::ExcludeUserInput);
    }
    m_pWorkspace->setUpdatesEnabled(true);

    // Save as default session directory.
    if (m_pOptions)
        m_pOptions->sSessionDir = QFileInfo(sFilename).dirPath(true);
    // We're not dirty anymore.
    m_iDirtyCount = 0;
    // Stabilize form...
    m_sFilename = sFilename;
    updateRecentFiles(sFilename);
    appendMessages(tr("Open session: \"%1\".").arg(sessionName(m_sFilename)));
    stabilizeForm();
    return true;
}


// Save current session to specific file path.
bool qsamplerMainForm::saveSessionFile ( const QString& sFilename )
{
    // Open and write into real file.
    QFile file(sFilename);
    if (!file.open(IO_WriteOnly | IO_Truncate)) {
        appendMessagesError(tr("Could not open \"%1\" session file.\n\nSorry.").arg(sFilename));
        return false;
    }

    // Write the file.
    int iErrors = 0;
    QTextStream ts(&file);
    ts << "# " << QSAMPLER_TITLE " - " << tr(QSAMPLER_SUBTITLE) << endl;
    ts << "# " << tr("Version")
       << ": " QSAMPLER_VERSION << endl;
    ts << "# " << tr("Build")
       << ": " __DATE__ " " __TIME__ << endl;
    ts << "#"  << endl;
    ts << "# " << tr("File")
       << ": " << QFileInfo(sFilename).fileName() << endl;
    ts << "# " << tr("Date")
       << ": " << QDate::currentDate().toString("MMMM dd yyyy")
       << " "  << QTime::currentTime().toString("hh:mm:ss") << endl;
    ts << "#"  << endl;
    ts << endl;
    QWidgetList wlist = m_pWorkspace->windowList();
    for (int iChannel = 0; iChannel < (int) wlist.count(); iChannel++) {
        qsamplerChannelStrip *pChannelStrip = (qsamplerChannelStrip *) wlist.at(iChannel);
        if (pChannelStrip) {
            qsamplerChannel *pChannel = pChannelStrip->channel();
            if (pChannel) {
                int iChannelID = pChannel->channelID();
                ts << "# " << pChannelStrip->caption() << endl;
                ts << "ADD CHANNEL" << endl;
                ts << "SET CHANNEL AUDIO_OUTPUT_TYPE " << iChannelID << " " << pChannel->audioDriver() << endl;
                ts << "SET CHANNEL MIDI_INPUT_TYPE " << iChannelID << " " << pChannel->midiDriver() << endl;
                ts << "SET CHANNEL MIDI_INPUT_PORT " << iChannelID << " " << pChannel->midiPort() << endl;
                ts << "SET CHANNEL MIDI_INPUT_CHANNEL " << iChannelID << " ";
                if (pChannel->midiChannel() > 0)
                    ts << pChannel->midiChannel();
                 else
                    ts << "ALL";
                ts << endl;
                ts << "LOAD ENGINE " << pChannel->engineName() << " " << iChannelID << endl;
                ts << "LOAD INSTRUMENT NON_MODAL '" << pChannel->instrumentFile() << "' " << pChannel->instrumentNr() << " " << iChannelID << endl;
                ts << "SET CHANNEL VOLUME " << iChannelID << " " << pChannel->volume() << endl;
                ts << endl;
            }
        }
        // Try to keep it snappy :)
        QApplication::eventLoop()->processEvents(QEventLoop::ExcludeUserInput);
    }

    // Ok. we've wrote it.
    file.close();

    // Have we any errors?
    if (iErrors > 0)
        appendMessagesError(tr("Some settings could not be saved\nto \"%1\" session file.\n\nSorry.").arg(sFilename));

    // Save as default session directory.
    if (m_pOptions)
        m_pOptions->sSessionDir = QFileInfo(sFilename).dirPath(true);
    // We're not dirty anymore.
    m_iDirtyCount = 0;
    // Stabilize form...
    m_sFilename = sFilename;
    updateRecentFiles(sFilename);
    appendMessages(tr("Save session: \"%1\".").arg(sessionName(m_sFilename)));
    stabilizeForm();
    return true;
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- File Action slots.

// Create a new sampler session.
void qsamplerMainForm::fileNew (void)
{
    // Of course we'll start clean new.
    newSession();
}


// Open an existing sampler session.
void qsamplerMainForm::fileOpen (void)
{
    // Open it right away.
    openSession();
}


// Open a recent file session.
void qsamplerMainForm::fileOpenRecent ( int iIndex )
{
    // Check if we can safely close the current session...
    if (m_pOptions && closeSession(true)) {
        QString sFilename = m_pOptions->recentFiles[iIndex];
        loadSessionFile(sFilename);
    }
}


// Save current sampler session.
void qsamplerMainForm::fileSave (void)
{
    // Save it right away.
    saveSession(false);
}


// Save current sampler session with another name.
void qsamplerMainForm::fileSaveAs (void)
{
    // Save it right away, maybe with another name.
    saveSession(true);
}


// Reset the sampler instance.
void qsamplerMainForm::fileReset (void)
{
    if (m_pClient == NULL)
        return;

    // Ask user whether he/she want's an internal sampler reset...
    if (QMessageBox::warning(this, tr("Warning"),
        tr("Resetting the sampler instance will close\n"
           "all device and channel configurations.\n\n"
           "Please note that this operation may cause\n"
           "temporary MIDI and Audio disruption\n\n"
           "Do you want to reset the sampler engine now?"),
        tr("Reset"), tr("Cancel")) > 0)
        return;

    // Just do the reset, after closing down current session...
    if (closeSession(true) && ::lscp_reset_sampler(m_pClient) != LSCP_OK) {
        appendMessagesClient("lscp_reset_sampler");
        appendMessagesError(tr("Could not reset sampler instance.\n\nSorry."));
        return;
    }

    // Log this.
    appendMessages(tr("Sampler reset."));
}


// Restart the client/server instance.
void qsamplerMainForm::fileRestart (void)
{
    if (m_pOptions == NULL)
        return;
        
    bool bRestart = true;
    
    // Ask user whether he/she want's a complete restart...
    // (if we're currently up and running)
    if (bRestart && m_pClient) {
        bRestart = (QMessageBox::warning(this, tr("Warning"),
            tr("New settings will be effective after\n"
               "restarting the client/server connection.\n\n"
               "Please note that this operation may cause\n"
               "temporary MIDI and Audio disruption\n\n"
               "Do you want to restart the connection now?"),
            tr("Restart"), tr("Cancel")) == 0);
    }

    // Are we still for it?
    if (bRestart && closeSession(true)) {
        // Stop server, it will force the client too.
        stopServer();
        // Reschedule a restart...
        startSchedule(m_pOptions->iStartDelay);
    }
}


// Exit application program.
void qsamplerMainForm::fileExit (void)
{
    // Go for close the whole thing.
    close();
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- Edit Action slots.

// Add a new sampler channel.
void qsamplerMainForm::editAddChannel (void)
{
    if (m_pClient == NULL)
        return;

    // Create the new sampler channel.
    int iChannelID = ::lscp_add_channel(m_pClient);
    if (iChannelID < 0) {
        appendMessagesClient("lscp_add_channel");
        appendMessagesError(tr("Could not create the new channel.\n\nSorry."));
        return;
    }

    // Log this happening.
    appendMessages(tr("Channel %1 created.").arg(iChannelID));

    // Just create the channel strip with given id.
    createChannel(iChannelID, true);

    // We'll be dirty, for sure...
    m_iDirtyCount++;
    // Stabilize form anyway.
    stabilizeForm();
}


// Remove current sampler channel.
void qsamplerMainForm::editRemoveChannel (void)
{
    if (m_pClient == NULL)
        return;

    qsamplerChannelStrip *pChannelStrip = activeChannelStrip();
    if (pChannelStrip == NULL)
        return;
        
    qsamplerChannel *pChannel = pChannelStrip->channel();
    if (pChannel == NULL)
        return;

    // Prompt user if he/she's sure about this...
    if (m_pOptions && m_pOptions->bConfirmRemove) {
        if (QMessageBox::warning(this, tr("Warning"),
            tr("About to remove channel:\n\n"
               "%1\n\n"
               "Are you sure?")
               .arg(pChannelStrip->caption()),
            tr("OK"), tr("Cancel")) > 0)
            return;
    }

    // Remove the existing sampler channel.
    if (::lscp_remove_channel(m_pClient, pChannel->channelID()) != LSCP_OK) {
        appendMessagesClient("lscp_remove_channel");
        appendMessagesError(tr("Could not remove channel.\n\nSorry."));
        return;
    }

    // Log this happening.
    appendMessages(tr("Channel %1 removed.").arg(pChannel->channelID()));
    
    // Just delete the channel strip.
    delete pChannel;
    // Do we auto-arrange?
    if (m_pOptions && m_pOptions->bAutoArrange)
        channelsArrange();

    // We'll be dirty, for sure...
    m_iDirtyCount++;
    stabilizeForm();
}


// Setup current sampler channel.
void qsamplerMainForm::editSetupChannel (void)
{
    if (m_pClient == NULL)
        return;

    qsamplerChannelStrip *pChannelStrip = activeChannelStrip();
    if (pChannelStrip == NULL)
        return;

    // Just invoque the channel strip procedure.
    pChannelStrip->showChannelSetup(false);
}


// Reset current sampler channel.
void qsamplerMainForm::editResetChannel (void)
{
    if (m_pClient == NULL)
        return;

    qsamplerChannelStrip *pChannelStrip = activeChannelStrip();
    if (pChannelStrip == NULL)
        return;

    qsamplerChannel *pChannel = pChannelStrip->channel();
    if (pChannel == NULL)
        return;

    // Remove the existing sampler channel.
    if (::lscp_reset_channel(m_pClient, pChannel->channelID()) != LSCP_OK) {
        appendMessagesClient("lscp_reset_channel");
        appendMessagesError(tr("Could not reset channel.\n\nSorry."));
        return;
    }

    // Log this.
    appendMessages(tr("Channel %1 reset.").arg(pChannel->channelID()));

    // Refresh channel strip info.
    pChannelStrip->updateChannelInfo();
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- View Action slots.

// Show/hide the main program window menubar.
void qsamplerMainForm::viewMenubar ( bool bOn )
{
    if (bOn)
        MenuBar->show();
    else
        MenuBar->hide();
}


// Show/hide the main program window toolbar.
void qsamplerMainForm::viewToolbar ( bool bOn )
{
    if (bOn) {
        fileToolbar->show();
        editToolbar->show();
        channelsToolbar->show();
    } else {
        fileToolbar->hide();
        editToolbar->hide();
        channelsToolbar->hide();
    }
}


// Show/hide the main program window statusbar.
void qsamplerMainForm::viewStatusbar ( bool bOn )
{
    if (bOn)
        statusBar()->show();
    else
        statusBar()->hide();
}


// Show/hide the messages window logger.
void qsamplerMainForm::viewMessages ( bool bOn )
{
    if (bOn)
        m_pMessages->show();
    else
        m_pMessages->hide();
}


// Show options dialog.
void qsamplerMainForm::viewOptions (void)
{
    if (m_pOptions == NULL)
        return;

    qsamplerOptionsForm *pOptionsForm = new qsamplerOptionsForm(this);
    if (pOptionsForm) {
        // Check out some initial nullities(tm)...
        qsamplerChannelStrip *pChannelStrip = activeChannelStrip();
        if (m_pOptions->sDisplayFont.isEmpty() && pChannelStrip)
            m_pOptions->sDisplayFont = pChannelStrip->displayFont().toString();
        if (m_pOptions->sMessagesFont.isEmpty() && m_pMessages)
            m_pOptions->sMessagesFont = m_pMessages->messagesFont().toString();
        // To track down deferred or immediate changes.
        QString sOldServerHost      = m_pOptions->sServerHost;
        int     iOldServerPort      = m_pOptions->iServerPort;
        int     iOldServerTimeout   = m_pOptions->iServerTimeout;
        bool    bOldServerStart     = m_pOptions->bServerStart;
        QString sOldServerCmdLine   = m_pOptions->sServerCmdLine;
        QString sOldDisplayFont     = m_pOptions->sDisplayFont;
        int     iOldMaxVolume       = m_pOptions->iMaxVolume;
        QString sOldMessagesFont    = m_pOptions->sMessagesFont;
        bool    bOldStdoutCapture   = m_pOptions->bStdoutCapture;
        int     bOldMessagesLimit   = m_pOptions->bMessagesLimit;
        int     iOldMessagesLimitLines = m_pOptions->iMessagesLimitLines;
        bool    bOldCompletePath    = m_pOptions->bCompletePath;
        int     iOldMaxRecentFiles  = m_pOptions->iMaxRecentFiles;
        // Load the current setup settings.
        pOptionsForm->setup(m_pOptions);
        // Show the setup dialog...
        if (pOptionsForm->exec()) {
            // Warn if something will be only effective on next run.
            if (( bOldStdoutCapture && !m_pOptions->bStdoutCapture) ||
                (!bOldStdoutCapture &&  m_pOptions->bStdoutCapture)) {
                QMessageBox::information(this, tr("Information"),
                    tr("Some settings may be only effective\n"
                       "next time you start this program."), tr("OK"));
                updateMessagesCapture();
            }
            // Check wheather something immediate has changed.
            if (( bOldCompletePath && !m_pOptions->bCompletePath) ||
                (!bOldCompletePath &&  m_pOptions->bCompletePath) ||
                (iOldMaxRecentFiles != m_pOptions->iMaxRecentFiles))
                updateRecentFilesMenu();
            if (sOldDisplayFont != m_pOptions->sDisplayFont)
                updateDisplayFont();
            if (iOldMaxVolume != m_pOptions->iMaxVolume)
                updateMaxVolume();
            if (sOldMessagesFont != m_pOptions->sMessagesFont)
                updateMessagesFont();
            if (( bOldMessagesLimit && !m_pOptions->bMessagesLimit) ||
                (!bOldMessagesLimit &&  m_pOptions->bMessagesLimit) ||
                (iOldMessagesLimitLines !=  m_pOptions->iMessagesLimitLines))
                updateMessagesLimit();
            // And now the main thing, whether we'll do client/server recycling?
            if ((sOldServerHost != m_pOptions->sServerHost) ||
                (iOldServerPort != m_pOptions->iServerPort) ||
                (iOldServerTimeout != m_pOptions->iServerTimeout) ||
                ( bOldServerStart && !m_pOptions->bServerStart) ||
                (!bOldServerStart &&  m_pOptions->bServerStart) ||
                (sOldServerCmdLine != m_pOptions->sServerCmdLine && m_pOptions->bServerStart))
                fileRestart();
        }
        // Done.
        delete pOptionsForm;
    }

    // This makes it.
    stabilizeForm();
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- Channels action slots.

// Arrange channel strips.
void qsamplerMainForm::channelsArrange (void)
{
    // Full width vertical tiling
    QWidgetList wlist = m_pWorkspace->windowList();
    if (wlist.isEmpty())
        return;

    m_pWorkspace->setUpdatesEnabled(false);
    int y = 0;
    for (int iChannel = 0; iChannel < (int) wlist.count(); iChannel++) {
        qsamplerChannelStrip *pChannelStrip = (qsamplerChannelStrip *) wlist.at(iChannel);
    /*  if (pChannelStrip->testWState(WState_Maximized | WState_Minimized)) {
            // Prevent flicker...
            pChannelStrip->hide();
            pChannelStrip->showNormal();
        }   */
        pChannelStrip->adjustSize();
        int iWidth  = m_pWorkspace->width();
        if (iWidth < pChannelStrip->width())
            iWidth = pChannelStrip->width();
    //  int iHeight = pChannelStrip->height() + pChannelStrip->parentWidget()->baseSize().height();
        int iHeight = pChannelStrip->parentWidget()->frameGeometry().height();
        pChannelStrip->parentWidget()->setGeometry(0, y, iWidth, iHeight);
        y += iHeight;
    }
    m_pWorkspace->setUpdatesEnabled(true);
    
    stabilizeForm();
}


// Auto-arrange channel strips.
void qsamplerMainForm::channelsAutoArrange ( bool bOn )
{
    if (m_pOptions == NULL)
        return;

    // Toggle the auto-arrange flag.
    m_pOptions->bAutoArrange = bOn;

    // If on, update whole workspace...
    if (m_pOptions->bAutoArrange)
        channelsArrange();
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- Help Action slots.

// Show information about the Qt toolkit.
void qsamplerMainForm::helpAboutQt (void)
{
    QMessageBox::aboutQt(this);
}


// Show information about application program.
void qsamplerMainForm::helpAbout (void)
{
    // Stuff the about box text...
    QString sText = "<p>\n";
    sText += "<b>" QSAMPLER_TITLE " - " + tr(QSAMPLER_SUBTITLE) + "</b><br />\n";
    sText += "<br />\n";
    sText += tr("Version") + ": <b>" QSAMPLER_VERSION "</b><br />\n";
    sText += "<small>" + tr("Build") + ": " __DATE__ " " __TIME__ "</small><br />\n";
#ifdef CONFIG_DEBUG
    sText += "<small><font color=\"red\">";
    sText += tr("Debugging option enabled.");
    sText += "</font></small><br />";
#endif
#ifndef CONFIG_LIBGIG
    sText += "<small><font color=\"red\">";
    sText += tr("GIG (libgig) file support disabled.");
    sText += "</font></small><br />";
#endif
    sText += "<br />\n";
    sText += tr("Using") + ": ";
    sText += ::lscp_client_package();
    sText += " ";
    sText += ::lscp_client_version();
    sText += "<br />\n";
    sText += "<br />\n";
    sText += tr("Website") + ": <a href=\"" QSAMPLER_WEBSITE "\">" QSAMPLER_WEBSITE "</a><br />\n";
    sText += "<br />\n";
    sText += "<small>";
    sText += QSAMPLER_COPYRIGHT "<br />\n";
    sText += "<br />\n";
    sText += tr("This program is free software; you can redistribute it and/or modify it") + "<br />\n";
    sText += tr("under the terms of the GNU General Public License version 2 or later.");
    sText += "</small>";
    sText += "</p>\n";

    QMessageBox::about(this, tr("About") + " " QSAMPLER_TITLE, sText);
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- Main window stabilization.

void qsamplerMainForm::stabilizeForm (void)
{
    // Update the main application caption...
    QString sSessioName = sessionName(m_sFilename);
    if (m_iDirtyCount > 0)
        sSessioName += '*';
    setCaption(tr(QSAMPLER_TITLE " - [%1]").arg(sSessioName));

    // Update the main menu state...
    qsamplerChannelStrip *pChannelStrip = activeChannelStrip();
    bool bHasClient  = (m_pOptions != NULL && m_pClient != NULL);
    bool bHasChannel = (bHasClient && pChannelStrip != NULL);
    fileNewAction->setEnabled(bHasClient);
    fileOpenAction->setEnabled(bHasClient);
    fileSaveAction->setEnabled(bHasClient && m_iDirtyCount > 0);
    fileSaveAsAction->setEnabled(bHasClient);
    fileResetAction->setEnabled(bHasClient);
    fileRestartAction->setEnabled(bHasClient || m_pServer == NULL);
    editAddChannelAction->setEnabled(bHasClient);
    editRemoveChannelAction->setEnabled(bHasChannel);
    editSetupChannelAction->setEnabled(bHasChannel);
    editResetChannelAction->setEnabled(bHasChannel);
    channelsArrangeAction->setEnabled(bHasChannel);
    viewMessagesAction->setOn(m_pMessages && m_pMessages->isVisible());

    // Client/Server status...
    if (bHasClient) {
        m_status[QSAMPLER_STATUS_CLIENT]->setText(tr("Connected"));
        m_status[QSAMPLER_STATUS_SERVER]->setText(m_pOptions->sServerHost + ":" + QString::number(m_pOptions->iServerPort));
    } else {
        m_status[QSAMPLER_STATUS_CLIENT]->clear();
        m_status[QSAMPLER_STATUS_SERVER]->clear();
    }
    // Channel status...
    if (bHasChannel)
        m_status[QSAMPLER_STATUS_CHANNEL]->setText(pChannelStrip->caption());
    else
        m_status[QSAMPLER_STATUS_CHANNEL]->clear();
    // Session status...
    if (m_iDirtyCount > 0)
        m_status[QSAMPLER_STATUS_SESSION]->setText(tr("MOD"));
    else
        m_status[QSAMPLER_STATUS_SESSION]->clear();

    // Recent files menu.
    m_pRecentFilesMenu->setEnabled(bHasClient && m_pOptions->recentFiles.count() > 0);

    // Always make the latest message visible.
    if (m_pMessages)
        m_pMessages->scrollToBottom();
}


// Channel change receiver slot.
void qsamplerMainForm::channelStripChanged( qsamplerChannelStrip * )
{
    // Just mark the dirty form.
    m_iDirtyCount++;
    // and update the form status...
    stabilizeForm();
}


// Update the recent files list and menu.
void qsamplerMainForm::updateRecentFiles ( const QString& sFilename )
{
    if (m_pOptions == NULL)
        return;

    // Remove from list if already there (avoid duplicates)
    QStringList::Iterator iter = m_pOptions->recentFiles.find(sFilename);
    if (iter != m_pOptions->recentFiles.end())
        m_pOptions->recentFiles.remove(iter);
    // Put it to front...
    m_pOptions->recentFiles.push_front(sFilename);

    // May update the menu.
    updateRecentFilesMenu();
}


// Update the recent files list and menu.
void qsamplerMainForm::updateRecentFilesMenu (void)
{
    if (m_pOptions == NULL)
        return;

    // Time to keep the list under limits.
    int iRecentFiles = m_pOptions->recentFiles.count();
    while (iRecentFiles > m_pOptions->iMaxRecentFiles) {
        m_pOptions->recentFiles.pop_back();
        iRecentFiles--;
    }
    
    // rebuild the recent files menu...
    m_pRecentFilesMenu->clear();
    for (int i = 0; i < iRecentFiles; i++) {
        const QString& sFilename = m_pOptions->recentFiles[i];
        if (QFileInfo(sFilename).exists()) {
            m_pRecentFilesMenu->insertItem(QString("&%1 %2")
                .arg(i + 1).arg(sessionName(sFilename)),
                this, SLOT(fileOpenRecent(int)), 0, i);
        }
    }
}


// Force update of the channels display font.
void qsamplerMainForm::updateDisplayFont (void)
{
    if (m_pOptions == NULL)
        return;

    // Check if display font is legal.
    if (m_pOptions->sDisplayFont.isEmpty())
        return;
    // Realize it.
    QFont font;
    if (!font.fromString(m_pOptions->sDisplayFont))
        return;

    // Full channel list update...
    QWidgetList wlist = m_pWorkspace->windowList();
    if (wlist.isEmpty())
        return;

    m_pWorkspace->setUpdatesEnabled(false);
    for (int iChannel = 0; iChannel < (int) wlist.count(); iChannel++) {
        qsamplerChannelStrip *pChannelStrip = (qsamplerChannelStrip *) wlist.at(iChannel);
        if (pChannelStrip)
            pChannelStrip->setDisplayFont(font);
    }
    m_pWorkspace->setUpdatesEnabled(true);
}


// Force update of the channels maximum volume setting.
void qsamplerMainForm::updateMaxVolume (void)
{
    if (m_pOptions == NULL)
        return;

    // Full channel list update...
    QWidgetList wlist = m_pWorkspace->windowList();
    if (wlist.isEmpty())
        return;

    m_pWorkspace->setUpdatesEnabled(false);
    for (int iChannel = 0; iChannel < (int) wlist.count(); iChannel++) {
        qsamplerChannelStrip *pChannelStrip = (qsamplerChannelStrip *) wlist.at(iChannel);
        if (pChannelStrip)
            pChannelStrip->setMaxVolume(m_pOptions->iMaxVolume);
    }
    m_pWorkspace->setUpdatesEnabled(true);
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- Messages window form handlers.

// Messages output methods.
void qsamplerMainForm::appendMessages( const QString& s )
{
    if (m_pMessages)
        m_pMessages->appendMessages(s);

    statusBar()->message(s, 3000);
}

void qsamplerMainForm::appendMessagesColor( const QString& s, const QString& c )
{
    if (m_pMessages)
        m_pMessages->appendMessagesColor(s, c);

    statusBar()->message(s, 3000);
}

void qsamplerMainForm::appendMessagesText( const QString& s )
{
    if (m_pMessages)
        m_pMessages->appendMessagesText(s);
}

void qsamplerMainForm::appendMessagesError( const QString& s )
{
    if (m_pMessages)
        m_pMessages->show();

    appendMessagesColor(s.simplifyWhiteSpace(), "#ff0000");

    QMessageBox::critical(this, tr("Error"), s, tr("Cancel"));
}


// This is a special message format, just for client results.
void qsamplerMainForm::appendMessagesClient( const QString& s )
{
    if (m_pClient == NULL)
        return;

    appendMessagesColor(s + QString(": %1 (errno=%2)")
        .arg(::lscp_client_get_result(m_pClient))
        .arg(::lscp_client_get_errno(m_pClient)), "#996666");
}


// Force update of the messages font.
void qsamplerMainForm::updateMessagesFont (void)
{
    if (m_pOptions == NULL)
        return;

    if (m_pMessages && !m_pOptions->sMessagesFont.isEmpty()) {
        QFont font;
        if (font.fromString(m_pOptions->sMessagesFont))
            m_pMessages->setMessagesFont(font);
    }
}


// Update messages window line limit.
void qsamplerMainForm::updateMessagesLimit (void)
{
    if (m_pOptions == NULL)
        return;

    if (m_pMessages) {
        if (m_pOptions->bMessagesLimit)
            m_pMessages->setMessagesLimit(m_pOptions->iMessagesLimitLines);
        else
            m_pMessages->setMessagesLimit(0);
    }
}


// Enablement of the messages capture feature.
void qsamplerMainForm::updateMessagesCapture (void)
{
    if (m_pOptions == NULL)
        return;

    if (m_pMessages)
        m_pMessages->setCaptureEnabled(m_pOptions->bStdoutCapture);
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- MDI channel strip management.

// The channel strip creation executive.
void qsamplerMainForm::createChannel ( int iChannelID, bool bPrompt )
{
    if (m_pClient == NULL)
        return;

    // Prepare for auto-arrange?
    qsamplerChannelStrip *pChannelStrip = NULL;
    int y = 0;
    if (m_pOptions && m_pOptions->bAutoArrange) {
        QWidgetList wlist = m_pWorkspace->windowList();
        for (int iChannel = 0; iChannel < (int) wlist.count(); iChannel++) {
            pChannelStrip = (qsamplerChannelStrip *) wlist.at(iChannel);
        //  y += pChannelStrip->height() + pChannelStrip->parentWidget()->baseSize().height();
            y += pChannelStrip->parentWidget()->frameGeometry().height();
        }
    }

    // Add a new channel itema...
    WFlags wflags = Qt::WStyle_Customize | Qt::WStyle_Tool | Qt::WStyle_Title | Qt::WStyle_NoBorder;
    pChannelStrip = new qsamplerChannelStrip(m_pWorkspace, 0, wflags);
    pChannelStrip->setMaxVolume(m_pOptions->iMaxVolume);
    pChannelStrip->setup(this, iChannelID);
    // We'll need a display font.
    QFont font;
    if (m_pOptions && font.fromString(m_pOptions->sDisplayFont))
        pChannelStrip->setDisplayFont(font);
    // Track channel setup changes.
    QObject::connect(pChannelStrip, SIGNAL(channelChanged(qsamplerChannelStrip *)), this, SLOT(channelStripChanged(qsamplerChannelStrip *)));
    // Before we show it up, may be we'll
    // better ask for some initial values?
    if (bPrompt)
        pChannelStrip->showChannelSetup(true);
    // Now we show up us to the world.
    pChannelStrip->show();
    // Only then, we'll auto-arrange...
    if (m_pOptions && m_pOptions->bAutoArrange) {
        int iWidth  = m_pWorkspace->width();
    //  int iHeight = pChannel->height() + pChannel->parentWidget()->baseSize().height();
        int iHeight = pChannelStrip->parentWidget()->frameGeometry().height();
        pChannelStrip->parentWidget()->setGeometry(0, y, iWidth, iHeight);
    }
}


// Retrieve the active channel strip.
qsamplerChannelStrip *qsamplerMainForm::activeChannelStrip (void)
{
    return (qsamplerChannelStrip *) m_pWorkspace->activeWindow();
}


// Retrieve a channel strip by index.
qsamplerChannelStrip *qsamplerMainForm::channelStripAt ( int iChannel )
{
    QWidgetList wlist = m_pWorkspace->windowList();
    if (wlist.isEmpty())
        return 0;

    return (qsamplerChannelStrip *) wlist.at(iChannel);
}


// Construct the windows menu.
void qsamplerMainForm::channelsMenuAboutToShow (void)
{
    channelsMenu->clear();
    channelsArrangeAction->addTo(channelsMenu);
    channelsAutoArrangeAction->addTo(channelsMenu);

    QWidgetList wlist = m_pWorkspace->windowList();
    if (!wlist.isEmpty()) {
        channelsMenu->insertSeparator();
        for (int iChannel = 0; iChannel < (int) wlist.count(); iChannel++) {
            qsamplerChannelStrip *pChannelStrip = (qsamplerChannelStrip *) wlist.at(iChannel);
            if (pChannelStrip) {
                int iItemID = channelsMenu->insertItem(pChannelStrip->caption(), this, SLOT(channelsMenuActivated(int)));
                channelsMenu->setItemParameter(iItemID, iChannel);
                channelsMenu->setItemChecked(iItemID, activeChannelStrip() == pChannelStrip);
            }
        }
    }
}


// Windows menu activation slot
void qsamplerMainForm::channelsMenuActivated ( int iChannel )
{
    qsamplerChannelStrip *pChannelStrip = channelStripAt(iChannel);
    if (pChannelStrip)
        pChannelStrip->showNormal();
    pChannelStrip->setFocus();
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- Timer stuff.

// Set the pseudo-timer delay schedule.
void qsamplerMainForm::startSchedule ( int iStartDelay )
{
    m_iStartDelay  = 1 + (iStartDelay * 1000);
    m_iTimerDelay  = 0;
}

// Suspend the pseudo-timer delay schedule.
void qsamplerMainForm::stopSchedule (void)
{
    m_iStartDelay  = 0;
    m_iTimerDelay  = 0;
}

// Timer slot funtion.
void qsamplerMainForm::timerSlot (void)
{
    if (m_pOptions == NULL)
        return;

    // Is it the first shot on server start after a few delay?
    if (m_iTimerDelay < m_iStartDelay) {
        m_iTimerDelay += QSAMPLER_TIMER_MSECS;
        if (m_iTimerDelay >= m_iStartDelay) {
            // If we cannot start it now, maybe a lil'mo'later ;)
            if (!startClient()) {
                m_iStartDelay += m_iTimerDelay;
                m_iTimerDelay  = 0;
            }
        }
    }
    
        // Refresh each channel usage, on each period...
    if (m_pClient && m_pOptions->bAutoRefresh && m_pWorkspace->isUpdatesEnabled()) {
        m_iTimerSlot += QSAMPLER_TIMER_MSECS;
        if (m_iTimerSlot >= m_pOptions->iAutoRefreshTime)  {
            m_iTimerSlot = 0;
            QWidgetList wlist = m_pWorkspace->windowList();
            for (int iChannel = 0; iChannel < (int) wlist.count(); iChannel++) {
                qsamplerChannelStrip *pChannelStrip = (qsamplerChannelStrip *) wlist.at(iChannel);
                if (pChannelStrip && pChannelStrip->isVisible())
                    pChannelStrip->updateChannelUsage();
            }
        }
    }

    // Register the next timer slot.
    QTimer::singleShot(QSAMPLER_TIMER_MSECS, this, SLOT(timerSlot()));
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- Server stuff.

// Start linuxsampler server...
void qsamplerMainForm::startServer (void)
{
    if (m_pOptions == NULL)
        return;

    // Aren't already a client, are we?
    if (!m_pOptions->bServerStart || m_pClient)
        return;

    // Is the server process instance still here?
    if (m_pServer) {
        switch (QMessageBox::warning(this, tr("Warning"),
            tr("Could not start the LinuxSampler server.\n\n"
               "Maybe it ss already started."),
            tr("Stop"), tr("Kill"), tr("Cancel"))) {
          case 0:
            m_pServer->tryTerminate();
            break;
          case 1:
            m_pServer->kill();
            break;
        }
        return;
    }

    // Reset our timer counters...
    stopSchedule();

    // OK. Let's build the startup process...
    m_pServer = new QProcess(this);

    // Setup stdout/stderr capture...
    //if (m_pOptions->bStdoutCapture) {
        m_pServer->setCommunication(QProcess::Stdout | QProcess::Stderr | QProcess::DupStderr);
        QObject::connect(m_pServer, SIGNAL(readyReadStdout()), this, SLOT(readServerStdout()));
        QObject::connect(m_pServer, SIGNAL(readyReadStderr()), this, SLOT(readServerStdout()));
    //}
    // The unforgiveable signal communication...
    QObject::connect(m_pServer, SIGNAL(processExited()), this, SLOT(processServerExit()));

    // Build process arguments...
    m_pServer->setArguments(QStringList::split(' ', m_pOptions->sServerCmdLine));

    appendMessages(tr("Server is starting..."));
    appendMessagesColor(m_pOptions->sServerCmdLine, "#990099");

    // Go jack, go...
    if (!m_pServer->start()) {
        appendMessagesError(tr("Could not start server.\n\nSorry."));
        processServerExit();
        return;
    }

    // Show startup results...
    appendMessages(tr("Server was started with PID=%1.").arg((long) m_pServer->processIdentifier()));

    // Reset (yet again) the timer counters,
    // but this time is deferred as the user opted.
    startSchedule(m_pOptions->iStartDelay);
    stabilizeForm();
}


// Stop linuxsampler server...
void qsamplerMainForm::stopServer (void)
{
    // Stop client code.
    stopClient();

    // And try to stop server.
    if (m_pServer) {
        appendMessages(tr("Server is stopping..."));
        if (m_pServer->isRunning())
            m_pServer->tryTerminate();
     }

    // Give it some time to terminate gracefully and stabilize...
    QTime t;
    t.start();
    while (t.elapsed() < QSAMPLER_TIMER_MSECS)
        QApplication::eventLoop()->processEvents(QEventLoop::ExcludeUserInput);

     // Do final processing anyway.
     processServerExit();
}


// Stdout handler...
void qsamplerMainForm::readServerStdout (void)
{
    if (m_pMessages)
        m_pMessages->appendStdoutBuffer(m_pServer->readStdout());
}


// Linuxsampler server cleanup.
void qsamplerMainForm::processServerExit (void)
{
    // Force client code cleanup.
    stopClient();

    // Flush anything that maybe pending...
    if (m_pMessages)
        m_pMessages->flushStdoutBuffer();

    if (m_pServer) {
        // Force final server shutdown...
        appendMessages(tr("Server was stopped with exit status %1.").arg(m_pServer->exitStatus()));
        if (!m_pServer->normalExit())
            m_pServer->kill();
        // Destroy it.
        delete m_pServer;
        m_pServer = NULL;
    }

    // Again, make status visible stable.
    stabilizeForm();
}


//-------------------------------------------------------------------------
// qsamplerMainForm -- Client stuff.

// The LSCP client callback procedure.
lscp_status_t qsampler_client_callback ( lscp_client_t */*pClient*/, lscp_event_t event, const char *pchData, int cchData, void *pvData )
{
    qsamplerMainForm *pMainForm = (qsamplerMainForm *) pvData;
    if (pMainForm == NULL)
        return LSCP_FAILED;

    // ATTN: DO NOT EVER call any GUI code here,
    // as this is run under some other thread context.
    // A custom event must be posted here...
    QApplication::postEvent(pMainForm, new qsamplerCustomEvent(event, pchData, cchData));

    return LSCP_OK;
}


// Start our almighty client...
bool qsamplerMainForm::startClient (void)
{
    // Have it a setup?
    if (m_pOptions == NULL)
        return false;

    // Aren't we already started, are we?
    if (m_pClient)
        return true;

    // Log prepare here.
    appendMessages(tr("Client connecting..."));

    // Create the client handle...
    m_pClient = ::lscp_client_create(m_pOptions->sServerHost.latin1(), m_pOptions->iServerPort, qsampler_client_callback, this);
    if (m_pClient == NULL) {
        // Is this the first try?
        // maybe we need to start a local server...
        if ((m_pServer && m_pServer->isRunning()) || !m_pOptions->bServerStart)
            appendMessagesError(tr("Could not connect to server as client.\n\nSorry."));
        else
            startServer();
        // This is always a failure.
        stabilizeForm();
        return false;
    }
    // Just set receive timeout value, blindly.
    ::lscp_client_set_timeout(m_pClient, m_pOptions->iServerTimeout);
    appendMessages(tr("Client receive timeout is set to %1 msec.").arg(::lscp_client_get_timeout(m_pClient)));

    // We may stop scheduling around.
    stopSchedule();

    // We'll accept drops from now on...
    setAcceptDrops(true);

    // Log success here.
    appendMessages(tr("Client connected."));

    // Is any session pending to be loaded?
    if (!m_pOptions->sSessionFile.isEmpty()) {
        // Just load the prabably startup session...
        if (loadSessionFile(m_pOptions->sSessionFile)) {
            m_pOptions->sSessionFile = QString::null;
            return true;
        }
    }

    // Make a new session
    return newSession();
}


// Stop client...
void qsamplerMainForm::stopClient (void)
{
    if (m_pClient == NULL)
        return;

    // Log prepare here.
    appendMessages(tr("Client disconnecting..."));

    // Clear timer counters...
    stopSchedule();

    // We'll reject drops from now on...
    setAcceptDrops(false);

    // Force any channel strips around, but
    // but avoid removing the corresponding
    // channels from the back-end server.
    m_iDirtyCount = 0;
    closeSession(false);
    
    // Close us as a client...
    lscp_client_destroy(m_pClient);
    m_pClient = NULL;

    // Log final here.
    appendMessages(tr("Client disconnected."));

    // Make visible status.
    stabilizeForm();
}


// end of qsamplerMainForm.ui.h