trunk/src/qsamplerChannelStrip.cpp

// qsamplerChannelStrip.cpp
//
/****************************************************************************
   Copyright (C) 2004-2012, rncbc aka Rui Nuno Capela. All rights reserved.
   Copyright (C) 2007, 2008 Christian Schoenebeck

   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.,
   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

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

#include "qsamplerAbout.h"
#include "qsamplerChannelStrip.h"

#include "qsamplerMainForm.h"

#include "qsamplerChannelFxForm.h"

#include <QMessageBox>
#include <QDragEnterEvent>
#include <QFileInfo>
#include <QTimer>
#include <QUrl>

#if QT_VERSION >= 0x050000
#include <QMimeData>
#endif

// Channel status/usage usage limit control.
#define QSAMPLER_ERROR_LIMIT    3

// Needed for lroundf()
#include <math.h>

#ifndef CONFIG_ROUND
static inline long lroundf ( float x )
{
        if (x >= 0.0f)
                return long(x + 0.5f);
        else
                return long(x - 0.5f);
}
#endif


namespace QSampler {

//-------------------------------------------------------------------------
// QSampler::ChannelStrip -- Channel strip form implementation.
//

// MIDI activity pixmap common resources.
int      ChannelStrip::g_iMidiActivityRefCount = 0;
QPixmap *ChannelStrip::g_pMidiActivityLedOn    = NULL;
QPixmap *ChannelStrip::g_pMidiActivityLedOff   = NULL;

// Channel strip activation/selection.
ChannelStrip *ChannelStrip::g_pSelectedStrip = NULL;

ChannelStrip::ChannelStrip ( QWidget* pParent, Qt::WindowFlags wflags )
        : QWidget(pParent, wflags)
{
        m_ui.setupUi(this);

        // Initialize locals.
        m_pChannel     = NULL;
        m_iDirtyChange = 0;
        m_iErrorCount  = 0;

        if (++g_iMidiActivityRefCount == 1) {
                g_pMidiActivityLedOn  = new QPixmap(":/images/ledon1.png");
                g_pMidiActivityLedOff = new QPixmap(":/images/ledoff1.png");
        }

        m_ui.MidiActivityLabel->setPixmap(*g_pMidiActivityLedOff);

#ifndef CONFIG_EVENT_CHANNEL_MIDI
        m_ui.MidiActivityLabel->setToolTip("MIDI activity (disabled)");
#endif

        m_pMidiActivityTimer = new QTimer(this);
        m_pMidiActivityTimer->setSingleShot(true);

        QObject::connect(m_pMidiActivityTimer,
                SIGNAL(timeout()),
                SLOT(midiActivityLedOff())
        );

        // Try to restore normal window positioning.
        adjustSize();

        QObject::connect(m_ui.ChannelSetupPushButton,
                SIGNAL(clicked()),
                SLOT(channelSetup()));
        QObject::connect(m_ui.ChannelMutePushButton,
                SIGNAL(toggled(bool)),
                SLOT(channelMute(bool)));
        QObject::connect(m_ui.ChannelSoloPushButton,
                SIGNAL(toggled(bool)),
                SLOT(channelSolo(bool)));
        QObject::connect(m_ui.VolumeSlider,
                SIGNAL(valueChanged(int)),
                SLOT(volumeChanged(int)));
        QObject::connect(m_ui.VolumeSpinBox,
                SIGNAL(valueChanged(int)),
                SLOT(volumeChanged(int)));
        QObject::connect(m_ui.ChannelEditPushButton,
                SIGNAL(clicked()),
                SLOT(channelEdit()));
        QObject::connect(m_ui.FxPushButton,
                SIGNAL(clicked()),
                SLOT(channelFxEdit()));

        setSelected(false);
}


ChannelStrip::~ChannelStrip (void)
{
        setSelected(false);

        // Destroy existing channel descriptor.
        if (m_pChannel)
                delete m_pChannel;
        m_pChannel = NULL;

        if (--g_iMidiActivityRefCount == 0) {
                if (g_pMidiActivityLedOn)
                        delete g_pMidiActivityLedOn;
                g_pMidiActivityLedOn = NULL;
                if (g_pMidiActivityLedOff)
                        delete g_pMidiActivityLedOff;
                g_pMidiActivityLedOff = NULL;
        }
}


// Window drag-n-drop event handlers.
void ChannelStrip::dragEnterEvent ( QDragEnterEvent* pDragEnterEvent )
{
        if (m_pChannel == NULL)
                return;

        bool bAccept = false;

        if (pDragEnterEvent->source() == NULL) {
                const QMimeData *pMimeData = pDragEnterEvent->mimeData();
                if (pMimeData && pMimeData->hasUrls()) {
                        QListIterator<QUrl> iter(pMimeData->urls());
                        while (iter.hasNext()) {
                                const QString& sFilename = iter.next().toLocalFile();
                                if (!sFilename.isEmpty()) {
                                //      bAccept = Channel::isDlsInstrumentFile(sFilename);
                                        bAccept = QFileInfo(sFilename).exists();
                                        break;
                                }
                        }
                }
        }

        if (bAccept)
                pDragEnterEvent->accept();
        else
                pDragEnterEvent->ignore();
}


void ChannelStrip::dropEvent ( QDropEvent* pDropEvent )
{
        if (m_pChannel == NULL)
                return;

        if (pDropEvent->source())
                return;

        const QMimeData *pMimeData = pDropEvent->mimeData();
        if (pMimeData && pMimeData->hasUrls()) {
                QStringList files;
                QListIterator<QUrl> iter(pMimeData->urls());
                while (iter.hasNext()) {
                        const QString& sFilename = iter.next().toLocalFile();
                        if (!sFilename.isEmpty()) {
                                // Go and set the dropped instrument filename...
                                m_pChannel->setInstrument(sFilename, 0);
                                // Open up the channel dialog.
                                channelSetup();
                                break;
                        }
                }
        }
}


// Channel strip setup formal initializer.
void ChannelStrip::setup ( Channel *pChannel )
{
        // Destroy any previous channel descriptor;
        // (remember that once setup we own it!)
        if (m_pChannel)
                delete m_pChannel;

        // Set the new one...
        m_pChannel = pChannel;

        // Stabilize this around.
        updateChannelInfo();

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


// Channel secriptor accessor.
Channel *ChannelStrip::channel (void) const
{
        return m_pChannel;
}


// Messages view font accessors.
QFont ChannelStrip::displayFont (void) const
{
        return m_ui.EngineNameTextLabel->font();
}

void ChannelStrip::setDisplayFont ( const QFont & font )
{
        m_ui.EngineNameTextLabel->setFont(font);
        m_ui.MidiPortChannelTextLabel->setFont(font);
        m_ui.InstrumentNameTextLabel->setFont(font);
        m_ui.InstrumentStatusTextLabel->setFont(font);
}


// Channel display background effect.
void ChannelStrip::setDisplayEffect ( bool bDisplayEffect )
{
        QPalette pal;
        pal.setColor(QPalette::Foreground, Qt::yellow);
        m_ui.EngineNameTextLabel->setPalette(pal);
        m_ui.MidiPortChannelTextLabel->setPalette(pal);
        pal.setColor(QPalette::Foreground, Qt::green);
        if (bDisplayEffect) {
                QPixmap pm(":/images/displaybg1.png");
                pal.setBrush(QPalette::Background, QBrush(pm));
        } else {
                pal.setColor(QPalette::Background, Qt::black);
        }
        m_ui.ChannelInfoFrame->setPalette(pal);
        m_ui.InstrumentNameTextLabel->setPalette(pal);
        m_ui.StreamVoiceCountTextLabel->setPalette(pal);
}


// Maximum volume slider accessors.
void ChannelStrip::setMaxVolume ( int iMaxVolume )
{
        m_iDirtyChange++;
        m_ui.VolumeSlider->setRange(0, iMaxVolume);
        m_ui.VolumeSpinBox->setRange(0, iMaxVolume);
        m_iDirtyChange--;
}


// Channel setup dialog slot.
bool ChannelStrip::channelSetup (void)
{
        if (m_pChannel == NULL)
                return false;

        // Invoke the channel setup dialog.
        bool bResult = m_pChannel->channelSetup(this);
        // Notify that this channel has changed.
        if (bResult)
                emit channelChanged(this);

        return bResult;
}


// Channel mute slot.
bool ChannelStrip::channelMute ( bool bMute )
{
        if (m_pChannel == NULL)
                return false;

        // Invoke the channel mute method.
        bool bResult = m_pChannel->setChannelMute(bMute);
        // Notify that this channel has changed.
        if (bResult)
                emit channelChanged(this);

        return bResult;
}


// Channel solo slot.
bool ChannelStrip::channelSolo ( bool bSolo )
{
        if (m_pChannel == NULL)
                return false;

        // Invoke the channel solo method.
        bool bResult = m_pChannel->setChannelSolo(bSolo);
        // Notify that this channel has changed.
        if (bResult)
                emit channelChanged(this);

        return bResult;
}


// Channel edit slot.
void ChannelStrip::channelEdit (void)
{
        if (m_pChannel == NULL)
                return;

        m_pChannel->editChannel();
}

bool ChannelStrip::channelFxEdit (void)
{
        MainForm *pMainForm = MainForm::getInstance();
        if (!pMainForm || !channel())
                return false;

        pMainForm->appendMessages(QObject::tr("channel fx sends..."));

        bool bResult = false;

#if CONFIG_FXSEND
        ChannelFxForm *pChannelFxForm =
                new ChannelFxForm(channel(), parentWidget());
        if (pChannelFxForm) {
                //pChannelForm->setup(this);
                bResult = pChannelFxForm->exec();
                delete pChannelFxForm;
        }
#else // CONFIG_FXSEND
        QMessageBox::critical(this,
                QSAMPLER_TITLE ": " + tr("Unavailable"),
                        tr("Sorry, QSampler was built without FX send support!\n\n"
                           "(Make sure you have a recent liblscp when recompiling QSampler)"));
#endif // CONFIG_FXSEND

        return bResult;
}

// Channel reset slot.
bool ChannelStrip::channelReset (void)
{
        if (m_pChannel == NULL)
                return false;

        // Invoke the channel reset method.
        bool bResult = m_pChannel->channelReset();
        // Notify that this channel has changed.
        if (bResult)
                emit channelChanged(this);

        return bResult;
}


// Update the channel instrument name.
bool ChannelStrip::updateInstrumentName ( bool bForce )
{
        if (m_pChannel == NULL)
                return false;

        // Do we refresh the actual name?
        if (bForce)
                m_pChannel->updateInstrumentName();

        // Instrument name...
        if (m_pChannel->instrumentName().isEmpty()) {
                if (m_pChannel->instrumentStatus() >= 0) {
                        m_ui.InstrumentNameTextLabel->setText(
                                ' ' + Channel::loadingInstrument());
                } else {
                        m_ui.InstrumentNameTextLabel->setText(
                                ' ' + Channel::noInstrumentName());
                }
        } else {
                m_ui.InstrumentNameTextLabel->setText(
                        ' ' + m_pChannel->instrumentName());
        }

        return true;
}


// Do the dirty volume change.
bool ChannelStrip::updateChannelVolume (void)
{
        if (m_pChannel == NULL)
                return false;

        // Convert...
        int iVolume = ::lroundf(100.0f * m_pChannel->volume());
        // And clip...
        if (iVolume < 0)
                iVolume = 0;

        // Flag it here, to avoid infinite recursion.
        m_iDirtyChange++;
        m_ui.VolumeSlider->setValue(iVolume);
        m_ui.VolumeSpinBox->setValue(iVolume);
        m_iDirtyChange--;

        return true;
}


// Update whole channel info state.
bool ChannelStrip::updateChannelInfo (void)
{
        if (m_pChannel == NULL)
                return false;

        // Check for error limit/recycle...
        if (m_iErrorCount > QSAMPLER_ERROR_LIMIT)
                return true;

        // Update strip caption.
        QString sText = m_pChannel->channelName();
        setWindowTitle(sText);
        m_ui.ChannelSetupPushButton->setText('&' + sText);

        // Check if we're up and connected.
        MainForm* pMainForm = MainForm::getInstance();
        if (pMainForm->client() == NULL)
                return false;

        // Read actual channel information.
        m_pChannel->updateChannelInfo();

        // Engine name...
        if (m_pChannel->engineName().isEmpty()) {
                m_ui.EngineNameTextLabel->setText(
                        ' ' + Channel::noEngineName());
        } else {
                m_ui.EngineNameTextLabel->setText(
                        ' ' + m_pChannel->engineName());
        }

        // Instrument name...
        updateInstrumentName(false);

        // MIDI Port/Channel...
        QString sMidiPortChannel = QString::number(m_pChannel->midiPort()) + " / ";
        if (m_pChannel->midiChannel() == LSCP_MIDI_CHANNEL_ALL)
                sMidiPortChannel += tr("All");
        else
                sMidiPortChannel += QString::number(m_pChannel->midiChannel() + 1);
        m_ui.MidiPortChannelTextLabel->setText(sMidiPortChannel);

        // Common palette...
        QPalette pal;
        const QColor& rgbFore = pal.color(QPalette::Foreground);

        // Instrument status...
        int iInstrumentStatus = m_pChannel->instrumentStatus();
        if (iInstrumentStatus < 0) {
                pal.setColor(QPalette::Foreground, Qt::red);
                m_ui.InstrumentStatusTextLabel->setPalette(pal);
                m_ui.InstrumentStatusTextLabel->setText(
                        tr("ERR%1").arg(iInstrumentStatus));
                m_iErrorCount++;
                return false;
        }
        // All seems normal...
        pal.setColor(QPalette::Foreground,
                iInstrumentStatus < 100 ? Qt::yellow : Qt::green);
        m_ui.InstrumentStatusTextLabel->setPalette(pal);
        m_ui.InstrumentStatusTextLabel->setText(
                QString::number(iInstrumentStatus) + '%');
        m_iErrorCount = 0;

#ifdef CONFIG_MUTE_SOLO
        // Mute/Solo button state coloring...
        bool bMute = m_pChannel->channelMute();
        const QColor& rgbButton = pal.color(QPalette::Button);
        const QColor& rgbButtonText = pal.color(QPalette::ButtonText);
        pal.setColor(QPalette::Foreground, rgbFore);
        pal.setColor(QPalette::Button, bMute ? Qt::yellow : rgbButton);
        pal.setColor(QPalette::ButtonText, bMute ? Qt::darkYellow : rgbButtonText);
        m_ui.ChannelMutePushButton->setPalette(pal);
        m_ui.ChannelMutePushButton->setDown(bMute);
        bool bSolo = m_pChannel->channelSolo();
        pal.setColor(QPalette::Button, bSolo ? Qt::cyan : rgbButton);   
        pal.setColor(QPalette::ButtonText, bSolo ? Qt::darkCyan : rgbButtonText);
        m_ui.ChannelSoloPushButton->setPalette(pal);
        m_ui.ChannelSoloPushButton->setDown(bSolo);
#else
        m_ui.ChannelMutePushButton->setEnabled(false);
        m_ui.ChannelSoloPushButton->setEnabled(false);
#endif

        // And update the both GUI volume elements;
        // return success if, and only if, intrument is fully loaded...
        return updateChannelVolume() && (iInstrumentStatus == 100);
}


// Update whole channel usage state.
bool ChannelStrip::updateChannelUsage (void)
{
        if (m_pChannel == NULL)
                return false;

        MainForm *pMainForm = MainForm::getInstance();
        if (pMainForm->client() == NULL)
                return false;

        // This only makes sense on fully loaded channels...
        if (m_pChannel->instrumentStatus() < 100)
                return false;

        // Get current channel voice count.
        int iVoiceCount  = ::lscp_get_channel_voice_count(
                pMainForm->client(), m_pChannel->channelID());
// Get current stream count.
        int iStreamCount = ::lscp_get_channel_stream_count(
                pMainForm->client(), m_pChannel->channelID());
        // Get current channel buffer fill usage.
        // As benno has suggested this is the percentage usage
        // of the least filled buffer stream...
        int iStreamUsage = ::lscp_get_channel_stream_usage(
                pMainForm->client(), m_pChannel->channelID());;

        // Update the GUI elements...
        m_ui.StreamUsageProgressBar->setValue(iStreamUsage);
        m_ui.StreamVoiceCountTextLabel->setText(
                QString("%1 / %2").arg(iStreamCount).arg(iVoiceCount));

        // We're clean.
        return true;
}


// Volume change slot.
void ChannelStrip::volumeChanged ( int iVolume )
{
        if (m_pChannel == NULL)
                return;

        // Avoid recursion.
        if (m_iDirtyChange > 0)
                return;

        // Convert and clip.
        float fVolume = (float) iVolume / 100.0f;
        if (fVolume < 0.001f)
                fVolume = 0.0f;

        // Update the GUI elements.
        if (m_pChannel->setVolume(fVolume)) {
                updateChannelVolume();
                emit channelChanged(this);
        }
}


// Context menu event handler.
void ChannelStrip::contextMenuEvent( QContextMenuEvent *pEvent )
{
        if (m_pChannel == NULL)
                return;

        // We'll just show up the main form's edit menu (thru qsamplerChannel).
        m_pChannel->contextMenuEvent(pEvent);
}


void ChannelStrip::midiActivityLedOn (void)
{
        m_ui.MidiActivityLabel->setPixmap(*g_pMidiActivityLedOn);
        m_pMidiActivityTimer->start(100);
}


void ChannelStrip::midiActivityLedOff (void)
{
        m_ui.MidiActivityLabel->setPixmap(*g_pMidiActivityLedOff);
}


// Error count hackish accessors.
void ChannelStrip::resetErrorCount (void)
{
        m_iErrorCount = 0;
}


// Channel strip activation/selection.
void ChannelStrip::setSelected ( bool bSelected )
{
        if (bSelected) {
                if (g_pSelectedStrip == this)
                        return;
                if (g_pSelectedStrip)
                        g_pSelectedStrip->setSelected(false);
                g_pSelectedStrip = this;
        } else {
                if (g_pSelectedStrip == this)
                        g_pSelectedStrip = NULL;
        }

        QPalette pal;
        if (bSelected) {
                const QColor& color = pal.midlight().color();
                pal.setColor(QPalette::Background, color.dark(150));
                pal.setColor(QPalette::Foreground, color.light(150));
        }
        QWidget::setPalette(pal);
}


bool ChannelStrip::isSelected (void) const
{
        return (this == g_pSelectedStrip);
}


} // namespace QSampler


// end of qsamplerChannelStrip.cpp
1	// qsamplerChannelStrip.cpp
2	//
3	/****************************************************************************
4	Copyright (C) 2004-2012, rncbc aka Rui Nuno Capela. All rights reserved.
5	Copyright (C) 2007, 2008 Christian Schoenebeck
6
7	This program is free software; you can redistribute it and/or
8	modify it under the terms of the GNU General Public License
9	as published by the Free Software Foundation; either version 2
10	of the License, or (at your option) any later version.
11
12	This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.
16
17	You should have received a copy of the GNU General Public License along
18	with this program; if not, write to the Free Software Foundation, Inc.,
19	51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20
21	*****************************************************************************/
22
23	#include "qsamplerAbout.h"
24	#include "qsamplerChannelStrip.h"
25
26	#include "qsamplerMainForm.h"
27
28	#include "qsamplerChannelFxForm.h"
29
30	#include <QMessageBox>
31	#include <QDragEnterEvent>
32	#include <QFileInfo>
33	#include <QTimer>
34	#include <QUrl>
35
36	#if QT_VERSION >= 0x050000
37	#include <QMimeData>
38	#endif
39
40	// Channel status/usage usage limit control.
41	#define QSAMPLER_ERROR_LIMIT 3
42
43	// Needed for lroundf()
44	#include <math.h>
45
46	#ifndef CONFIG_ROUND
47	static inline long lroundf ( float x )
48	{
49	if (x >= 0.0f)
50	return long(x + 0.5f);
51	else
52	return long(x - 0.5f);
53	}
54	#endif
55
56
57	namespace QSampler {
58
59	//-------------------------------------------------------------------------
60	// QSampler::ChannelStrip -- Channel strip form implementation.
61	//
62
63	// MIDI activity pixmap common resources.
64	int ChannelStrip::g_iMidiActivityRefCount = 0;
65	QPixmap *ChannelStrip::g_pMidiActivityLedOn = NULL;
66	QPixmap *ChannelStrip::g_pMidiActivityLedOff = NULL;
67
68	// Channel strip activation/selection.
69	ChannelStrip *ChannelStrip::g_pSelectedStrip = NULL;
70
71	ChannelStrip::ChannelStrip ( QWidget* pParent, Qt::WindowFlags wflags )
72	: QWidget(pParent, wflags)
73	{
74	m_ui.setupUi(this);
75
76	// Initialize locals.
77	m_pChannel = NULL;
78	m_iDirtyChange = 0;
79	m_iErrorCount = 0;
80
81	if (++g_iMidiActivityRefCount == 1) {
82	g_pMidiActivityLedOn = new QPixmap(":/images/ledon1.png");
83	g_pMidiActivityLedOff = new QPixmap(":/images/ledoff1.png");
84	}
85
86	m_ui.MidiActivityLabel->setPixmap(*g_pMidiActivityLedOff);
87
88	#ifndef CONFIG_EVENT_CHANNEL_MIDI
89	m_ui.MidiActivityLabel->setToolTip("MIDI activity (disabled)");
90	#endif
91
92	m_pMidiActivityTimer = new QTimer(this);
93	m_pMidiActivityTimer->setSingleShot(true);
94
95	QObject::connect(m_pMidiActivityTimer,
96	SIGNAL(timeout()),
97	SLOT(midiActivityLedOff())
98	);
99
100	// Try to restore normal window positioning.
101	adjustSize();
102
103	QObject::connect(m_ui.ChannelSetupPushButton,
104	SIGNAL(clicked()),
105	SLOT(channelSetup()));
106	QObject::connect(m_ui.ChannelMutePushButton,
107	SIGNAL(toggled(bool)),
108	SLOT(channelMute(bool)));
109	QObject::connect(m_ui.ChannelSoloPushButton,
110	SIGNAL(toggled(bool)),
111	SLOT(channelSolo(bool)));
112	QObject::connect(m_ui.VolumeSlider,
113	SIGNAL(valueChanged(int)),
114	SLOT(volumeChanged(int)));
115	QObject::connect(m_ui.VolumeSpinBox,
116	SIGNAL(valueChanged(int)),
117	SLOT(volumeChanged(int)));
118	QObject::connect(m_ui.ChannelEditPushButton,
119	SIGNAL(clicked()),
120	SLOT(channelEdit()));
121	QObject::connect(m_ui.FxPushButton,
122	SIGNAL(clicked()),
123	SLOT(channelFxEdit()));
124
125	setSelected(false);
126	}
127
128
129	ChannelStrip::~ChannelStrip (void)
130	{
131	setSelected(false);
132
133	// Destroy existing channel descriptor.
134	if (m_pChannel)
135	delete m_pChannel;
136	m_pChannel = NULL;
137
138	if (--g_iMidiActivityRefCount == 0) {
139	if (g_pMidiActivityLedOn)
140	delete g_pMidiActivityLedOn;
141	g_pMidiActivityLedOn = NULL;
142	if (g_pMidiActivityLedOff)
143	delete g_pMidiActivityLedOff;
144	g_pMidiActivityLedOff = NULL;
145	}
146	}
147
148
149	// Window drag-n-drop event handlers.
150	void ChannelStrip::dragEnterEvent ( QDragEnterEvent* pDragEnterEvent )
151	{
152	if (m_pChannel == NULL)
153	return;
154
155	bool bAccept = false;
156
157	if (pDragEnterEvent->source() == NULL) {
158	const QMimeData *pMimeData = pDragEnterEvent->mimeData();
159	if (pMimeData && pMimeData->hasUrls()) {
160	QListIterator<QUrl> iter(pMimeData->urls());
161	while (iter.hasNext()) {
162	const QString& sFilename = iter.next().toLocalFile();
163	if (!sFilename.isEmpty()) {
164	// bAccept = Channel::isDlsInstrumentFile(sFilename);
165	bAccept = QFileInfo(sFilename).exists();
166	break;
167	}
168	}
169	}
170	}
171
172	if (bAccept)
173	pDragEnterEvent->accept();
174	else
175	pDragEnterEvent->ignore();
176	}
177
178
179	void ChannelStrip::dropEvent ( QDropEvent* pDropEvent )
180	{
181	if (m_pChannel == NULL)
182	return;
183
184	if (pDropEvent->source())
185	return;
186
187	const QMimeData *pMimeData = pDropEvent->mimeData();
188	if (pMimeData && pMimeData->hasUrls()) {
189	QStringList files;
190	QListIterator<QUrl> iter(pMimeData->urls());
191	while (iter.hasNext()) {
192	const QString& sFilename = iter.next().toLocalFile();
193	if (!sFilename.isEmpty()) {
194	// Go and set the dropped instrument filename...
195	m_pChannel->setInstrument(sFilename, 0);
196	// Open up the channel dialog.
197	channelSetup();
198	break;
199	}
200	}
201	}
202	}
203
204
205	// Channel strip setup formal initializer.
206	void ChannelStrip::setup ( Channel *pChannel )
207	{
208	// Destroy any previous channel descriptor;
209	// (remember that once setup we own it!)
210	if (m_pChannel)
211	delete m_pChannel;
212
213	// Set the new one...
214	m_pChannel = pChannel;
215
216	// Stabilize this around.
217	updateChannelInfo();
218
219	// We'll accept drops from now on...
220	if (m_pChannel)
221	setAcceptDrops(true);
222	}
223
224
225	// Channel secriptor accessor.
226	Channel *ChannelStrip::channel (void) const
227	{
228	return m_pChannel;
229	}
230
231
232	// Messages view font accessors.
233	QFont ChannelStrip::displayFont (void) const
234	{
235	return m_ui.EngineNameTextLabel->font();
236	}
237
238	void ChannelStrip::setDisplayFont ( const QFont & font )
239	{
240	m_ui.EngineNameTextLabel->setFont(font);
241	m_ui.MidiPortChannelTextLabel->setFont(font);
242	m_ui.InstrumentNameTextLabel->setFont(font);
243	m_ui.InstrumentStatusTextLabel->setFont(font);
244	}
245
246
247	// Channel display background effect.
248	void ChannelStrip::setDisplayEffect ( bool bDisplayEffect )
249	{
250	QPalette pal;
251	pal.setColor(QPalette::Foreground, Qt::yellow);
252	m_ui.EngineNameTextLabel->setPalette(pal);
253	m_ui.MidiPortChannelTextLabel->setPalette(pal);
254	pal.setColor(QPalette::Foreground, Qt::green);
255	if (bDisplayEffect) {
256	QPixmap pm(":/images/displaybg1.png");
257	pal.setBrush(QPalette::Background, QBrush(pm));
258	} else {
259	pal.setColor(QPalette::Background, Qt::black);
260	}
261	m_ui.ChannelInfoFrame->setPalette(pal);
262	m_ui.InstrumentNameTextLabel->setPalette(pal);
263	m_ui.StreamVoiceCountTextLabel->setPalette(pal);
264	}
265
266
267	// Maximum volume slider accessors.
268	void ChannelStrip::setMaxVolume ( int iMaxVolume )
269	{
270	m_iDirtyChange++;
271	m_ui.VolumeSlider->setRange(0, iMaxVolume);
272	m_ui.VolumeSpinBox->setRange(0, iMaxVolume);
273	m_iDirtyChange--;
274	}
275
276
277	// Channel setup dialog slot.
278	bool ChannelStrip::channelSetup (void)
279	{
280	if (m_pChannel == NULL)
281	return false;
282
283	// Invoke the channel setup dialog.
284	bool bResult = m_pChannel->channelSetup(this);
285	// Notify that this channel has changed.
286	if (bResult)
287	emit channelChanged(this);
288
289	return bResult;
290	}
291
292
293	// Channel mute slot.
294	bool ChannelStrip::channelMute ( bool bMute )
295	{
296	if (m_pChannel == NULL)
297	return false;
298
299	// Invoke the channel mute method.
300	bool bResult = m_pChannel->setChannelMute(bMute);
301	// Notify that this channel has changed.
302	if (bResult)
303	emit channelChanged(this);
304
305	return bResult;
306	}
307
308
309	// Channel solo slot.
310	bool ChannelStrip::channelSolo ( bool bSolo )
311	{
312	if (m_pChannel == NULL)
313	return false;
314
315	// Invoke the channel solo method.
316	bool bResult = m_pChannel->setChannelSolo(bSolo);
317	// Notify that this channel has changed.
318	if (bResult)
319	emit channelChanged(this);
320
321	return bResult;
322	}
323
324
325	// Channel edit slot.
326	void ChannelStrip::channelEdit (void)
327	{
328	if (m_pChannel == NULL)
329	return;
330
331	m_pChannel->editChannel();
332	}
333
334	bool ChannelStrip::channelFxEdit (void)
335	{
336	MainForm *pMainForm = MainForm::getInstance();
337	if (!pMainForm \|\| !channel())
338	return false;
339
340	pMainForm->appendMessages(QObject::tr("channel fx sends..."));
341
342	bool bResult = false;
343
344	#if CONFIG_FXSEND
345	ChannelFxForm *pChannelFxForm =
346	new ChannelFxForm(channel(), parentWidget());
347	if (pChannelFxForm) {
348	//pChannelForm->setup(this);
349	bResult = pChannelFxForm->exec();
350	delete pChannelFxForm;
351	}
352	#else // CONFIG_FXSEND
353	QMessageBox::critical(this,
354	QSAMPLER_TITLE ": " + tr("Unavailable"),
355	tr("Sorry, QSampler was built without FX send support!\n\n"
356	"(Make sure you have a recent liblscp when recompiling QSampler)"));
357	#endif // CONFIG_FXSEND
358
359	return bResult;
360	}
361
362	// Channel reset slot.
363	bool ChannelStrip::channelReset (void)
364	{
365	if (m_pChannel == NULL)
366	return false;
367
368	// Invoke the channel reset method.
369	bool bResult = m_pChannel->channelReset();
370	// Notify that this channel has changed.
371	if (bResult)
372	emit channelChanged(this);
373
374	return bResult;
375	}
376
377
378	// Update the channel instrument name.
379	bool ChannelStrip::updateInstrumentName ( bool bForce )
380	{
381	if (m_pChannel == NULL)
382	return false;
383
384	// Do we refresh the actual name?
385	if (bForce)
386	m_pChannel->updateInstrumentName();
387
388	// Instrument name...
389	if (m_pChannel->instrumentName().isEmpty()) {
390	if (m_pChannel->instrumentStatus() >= 0) {
391	m_ui.InstrumentNameTextLabel->setText(
392	' ' + Channel::loadingInstrument());
393	} else {
394	m_ui.InstrumentNameTextLabel->setText(
395	' ' + Channel::noInstrumentName());
396	}
397	} else {
398	m_ui.InstrumentNameTextLabel->setText(
399	' ' + m_pChannel->instrumentName());
400	}
401
402	return true;
403	}
404
405
406	// Do the dirty volume change.
407	bool ChannelStrip::updateChannelVolume (void)
408	{
409	if (m_pChannel == NULL)
410	return false;
411
412	// Convert...
413	int iVolume = ::lroundf(100.0f * m_pChannel->volume());
414	// And clip...
415	if (iVolume < 0)
416	iVolume = 0;
417
418	// Flag it here, to avoid infinite recursion.
419	m_iDirtyChange++;
420	m_ui.VolumeSlider->setValue(iVolume);
421	m_ui.VolumeSpinBox->setValue(iVolume);
422	m_iDirtyChange--;
423
424	return true;
425	}
426
427
428	// Update whole channel info state.
429	bool ChannelStrip::updateChannelInfo (void)
430	{
431	if (m_pChannel == NULL)
432	return false;
433
434	// Check for error limit/recycle...
435	if (m_iErrorCount > QSAMPLER_ERROR_LIMIT)
436	return true;
437
438	// Update strip caption.
439	QString sText = m_pChannel->channelName();
440	setWindowTitle(sText);
441	m_ui.ChannelSetupPushButton->setText('&' + sText);
442
443	// Check if we're up and connected.
444	MainForm* pMainForm = MainForm::getInstance();
445	if (pMainForm->client() == NULL)
446	return false;
447
448	// Read actual channel information.
449	m_pChannel->updateChannelInfo();
450
451	// Engine name...
452	if (m_pChannel->engineName().isEmpty()) {
453	m_ui.EngineNameTextLabel->setText(
454	' ' + Channel::noEngineName());
455	} else {
456	m_ui.EngineNameTextLabel->setText(
457	' ' + m_pChannel->engineName());
458	}
459
460	// Instrument name...
461	updateInstrumentName(false);
462
463	// MIDI Port/Channel...
464	QString sMidiPortChannel = QString::number(m_pChannel->midiPort()) + " / ";
465	if (m_pChannel->midiChannel() == LSCP_MIDI_CHANNEL_ALL)
466	sMidiPortChannel += tr("All");
467	else
468	sMidiPortChannel += QString::number(m_pChannel->midiChannel() + 1);
469	m_ui.MidiPortChannelTextLabel->setText(sMidiPortChannel);
470
471	// Common palette...
472	QPalette pal;
473	const QColor& rgbFore = pal.color(QPalette::Foreground);
474
475	// Instrument status...
476	int iInstrumentStatus = m_pChannel->instrumentStatus();
477	if (iInstrumentStatus < 0) {
478	pal.setColor(QPalette::Foreground, Qt::red);
479	m_ui.InstrumentStatusTextLabel->setPalette(pal);
480	m_ui.InstrumentStatusTextLabel->setText(
481	tr("ERR%1").arg(iInstrumentStatus));
482	m_iErrorCount++;
483	return false;
484	}
485	// All seems normal...
486	pal.setColor(QPalette::Foreground,
487	iInstrumentStatus < 100 ? Qt::yellow : Qt::green);
488	m_ui.InstrumentStatusTextLabel->setPalette(pal);
489	m_ui.InstrumentStatusTextLabel->setText(
490	QString::number(iInstrumentStatus) + '%');
491	m_iErrorCount = 0;
492
493	#ifdef CONFIG_MUTE_SOLO
494	// Mute/Solo button state coloring...
495	bool bMute = m_pChannel->channelMute();
496	const QColor& rgbButton = pal.color(QPalette::Button);
497	const QColor& rgbButtonText = pal.color(QPalette::ButtonText);
498	pal.setColor(QPalette::Foreground, rgbFore);
499	pal.setColor(QPalette::Button, bMute ? Qt::yellow : rgbButton);
500	pal.setColor(QPalette::ButtonText, bMute ? Qt::darkYellow : rgbButtonText);
501	m_ui.ChannelMutePushButton->setPalette(pal);
502	m_ui.ChannelMutePushButton->setDown(bMute);
503	bool bSolo = m_pChannel->channelSolo();
504	pal.setColor(QPalette::Button, bSolo ? Qt::cyan : rgbButton);
505	pal.setColor(QPalette::ButtonText, bSolo ? Qt::darkCyan : rgbButtonText);
506	m_ui.ChannelSoloPushButton->setPalette(pal);
507	m_ui.ChannelSoloPushButton->setDown(bSolo);
508	#else
509	m_ui.ChannelMutePushButton->setEnabled(false);
510	m_ui.ChannelSoloPushButton->setEnabled(false);
511	#endif
512
513	// And update the both GUI volume elements;
514	// return success if, and only if, intrument is fully loaded...
515	return updateChannelVolume() && (iInstrumentStatus == 100);
516	}
517
518
519	// Update whole channel usage state.
520	bool ChannelStrip::updateChannelUsage (void)
521	{
522	if (m_pChannel == NULL)
523	return false;
524
525	MainForm *pMainForm = MainForm::getInstance();
526	if (pMainForm->client() == NULL)
527	return false;
528
529	// This only makes sense on fully loaded channels...
530	if (m_pChannel->instrumentStatus() < 100)
531	return false;
532
533	// Get current channel voice count.
534	int iVoiceCount = ::lscp_get_channel_voice_count(
535	pMainForm->client(), m_pChannel->channelID());
536	// Get current stream count.
537	int iStreamCount = ::lscp_get_channel_stream_count(
538	pMainForm->client(), m_pChannel->channelID());
539	// Get current channel buffer fill usage.
540	// As benno has suggested this is the percentage usage
541	// of the least filled buffer stream...
542	int iStreamUsage = ::lscp_get_channel_stream_usage(
543	pMainForm->client(), m_pChannel->channelID());;
544
545	// Update the GUI elements...
546	m_ui.StreamUsageProgressBar->setValue(iStreamUsage);
547	m_ui.StreamVoiceCountTextLabel->setText(
548	QString("%1 / %2").arg(iStreamCount).arg(iVoiceCount));
549
550	// We're clean.
551	return true;
552	}
553
554
555	// Volume change slot.
556	void ChannelStrip::volumeChanged ( int iVolume )
557	{
558	if (m_pChannel == NULL)
559	return;
560
561	// Avoid recursion.
562	if (m_iDirtyChange > 0)
563	return;
564
565	// Convert and clip.
566	float fVolume = (float) iVolume / 100.0f;
567	if (fVolume < 0.001f)
568	fVolume = 0.0f;
569
570	// Update the GUI elements.
571	if (m_pChannel->setVolume(fVolume)) {
572	updateChannelVolume();
573	emit channelChanged(this);
574	}
575	}
576
577
578	// Context menu event handler.
579	void ChannelStrip::contextMenuEvent( QContextMenuEvent *pEvent )
580	{
581	if (m_pChannel == NULL)
582	return;
583
584	// We'll just show up the main form's edit menu (thru qsamplerChannel).
585	m_pChannel->contextMenuEvent(pEvent);
586	}
587
588
589	void ChannelStrip::midiActivityLedOn (void)
590	{
591	m_ui.MidiActivityLabel->setPixmap(*g_pMidiActivityLedOn);
592	m_pMidiActivityTimer->start(100);
593	}
594
595
596	void ChannelStrip::midiActivityLedOff (void)
597	{
598	m_ui.MidiActivityLabel->setPixmap(*g_pMidiActivityLedOff);
599	}
600
601
602	// Error count hackish accessors.
603	void ChannelStrip::resetErrorCount (void)
604	{
605	m_iErrorCount = 0;
606	}
607
608
609	// Channel strip activation/selection.
610	void ChannelStrip::setSelected ( bool bSelected )
611	{
612	if (bSelected) {
613	if (g_pSelectedStrip == this)
614	return;
615	if (g_pSelectedStrip)
616	g_pSelectedStrip->setSelected(false);
617	g_pSelectedStrip = this;
618	} else {
619	if (g_pSelectedStrip == this)
620	g_pSelectedStrip = NULL;
621	}
622
623	QPalette pal;
624	if (bSelected) {
625	const QColor& color = pal.midlight().color();
626	pal.setColor(QPalette::Background, color.dark(150));
627	pal.setColor(QPalette::Foreground, color.light(150));
628	}
629	QWidget::setPalette(pal);
630	}
631
632
633	bool ChannelStrip::isSelected (void) const
634	{
635	return (this == g_pSelectedStrip);
636	}
637
638
639	} // namespace QSampler
640
641
642	// end of qsamplerChannelStrip.cpp