trunk/src/qsamplerChannelStrip.cpp

// qsamplerChannelStrip.cpp
//
/****************************************************************************
   Copyright (C) 2004-2010, 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>


// 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) 2004-2010, 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
37	// Channel status/usage usage limit control.
38	#define QSAMPLER_ERROR_LIMIT 3
39
40	// Needed for lroundf()
41	#include <math.h>
42
43	#ifndef CONFIG_ROUND
44	static inline long lroundf ( float x )
45	{
46	if (x >= 0.0f)
47	return long(x + 0.5f);
48	else
49	return long(x - 0.5f);
50	}
51	#endif
52
53
54	namespace QSampler {
55
56	//-------------------------------------------------------------------------
57	// QSampler::ChannelStrip -- Channel strip form implementation.
58	//
59
60	// MIDI activity pixmap common resources.
61	int ChannelStrip::g_iMidiActivityRefCount = 0;
62	QPixmap *ChannelStrip::g_pMidiActivityLedOn = NULL;
63	QPixmap *ChannelStrip::g_pMidiActivityLedOff = NULL;
64
65	// Channel strip activation/selection.
66	ChannelStrip *ChannelStrip::g_pSelectedStrip = NULL;
67
68	ChannelStrip::ChannelStrip ( QWidget* pParent, Qt::WindowFlags wflags )
69	: QWidget(pParent, wflags)
70	{
71	m_ui.setupUi(this);
72
73	// Initialize locals.
74	m_pChannel = NULL;
75	m_iDirtyChange = 0;
76	m_iErrorCount = 0;
77
78	if (++g_iMidiActivityRefCount == 1) {
79	g_pMidiActivityLedOn = new QPixmap(":/images/ledon1.png");
80	g_pMidiActivityLedOff = new QPixmap(":/images/ledoff1.png");
81	}
82
83	m_ui.MidiActivityLabel->setPixmap(*g_pMidiActivityLedOff);
84
85	#ifndef CONFIG_EVENT_CHANNEL_MIDI
86	m_ui.MidiActivityLabel->setToolTip("MIDI activity (disabled)");
87	#endif
88
89	m_pMidiActivityTimer = new QTimer(this);
90	m_pMidiActivityTimer->setSingleShot(true);
91
92	QObject::connect(m_pMidiActivityTimer,
93	SIGNAL(timeout()),
94	SLOT(midiActivityLedOff())
95	);
96
97	// Try to restore normal window positioning.
98	adjustSize();
99
100	QObject::connect(m_ui.ChannelSetupPushButton,
101	SIGNAL(clicked()),
102	SLOT(channelSetup()));
103	QObject::connect(m_ui.ChannelMutePushButton,
104	SIGNAL(toggled(bool)),
105	SLOT(channelMute(bool)));
106	QObject::connect(m_ui.ChannelSoloPushButton,
107	SIGNAL(toggled(bool)),
108	SLOT(channelSolo(bool)));
109	QObject::connect(m_ui.VolumeSlider,
110	SIGNAL(valueChanged(int)),
111	SLOT(volumeChanged(int)));
112	QObject::connect(m_ui.VolumeSpinBox,
113	SIGNAL(valueChanged(int)),
114	SLOT(volumeChanged(int)));
115	QObject::connect(m_ui.ChannelEditPushButton,
116	SIGNAL(clicked()),
117	SLOT(channelEdit()));
118	QObject::connect(m_ui.FxPushButton,
119	SIGNAL(clicked()),
120	SLOT(channelFxEdit()));
121
122	setSelected(false);
123	}
124
125
126	ChannelStrip::~ChannelStrip (void)
127	{
128	setSelected(false);
129
130	// Destroy existing channel descriptor.
131	if (m_pChannel)
132	delete m_pChannel;
133	m_pChannel = NULL;
134
135	if (--g_iMidiActivityRefCount == 0) {
136	if (g_pMidiActivityLedOn)
137	delete g_pMidiActivityLedOn;
138	g_pMidiActivityLedOn = NULL;
139	if (g_pMidiActivityLedOff)
140	delete g_pMidiActivityLedOff;
141	g_pMidiActivityLedOff = NULL;
142	}
143	}
144
145
146	// Window drag-n-drop event handlers.
147	void ChannelStrip::dragEnterEvent ( QDragEnterEvent* pDragEnterEvent )
148	{
149	if (m_pChannel == NULL)
150	return;
151
152	bool bAccept = false;
153
154	if (pDragEnterEvent->source() == NULL) {
155	const QMimeData *pMimeData = pDragEnterEvent->mimeData();
156	if (pMimeData && pMimeData->hasUrls()) {
157	QListIterator<QUrl> iter(pMimeData->urls());
158	while (iter.hasNext()) {
159	const QString& sFilename = iter.next().toLocalFile();
160	if (!sFilename.isEmpty()) {
161	// bAccept = Channel::isDlsInstrumentFile(sFilename);
162	bAccept = QFileInfo(sFilename).exists();
163	break;
164	}
165	}
166	}
167	}
168
169	if (bAccept)
170	pDragEnterEvent->accept();
171	else
172	pDragEnterEvent->ignore();
173	}
174
175
176	void ChannelStrip::dropEvent ( QDropEvent* pDropEvent )
177	{
178	if (m_pChannel == NULL)
179	return;
180
181	if (pDropEvent->source())
182	return;
183
184	const QMimeData *pMimeData = pDropEvent->mimeData();
185	if (pMimeData && pMimeData->hasUrls()) {
186	QStringList files;
187	QListIterator<QUrl> iter(pMimeData->urls());
188	while (iter.hasNext()) {
189	const QString& sFilename = iter.next().toLocalFile();
190	if (!sFilename.isEmpty()) {
191	// Go and set the dropped instrument filename...
192	m_pChannel->setInstrument(sFilename, 0);
193	// Open up the channel dialog.
194	channelSetup();
195	break;
196	}
197	}
198	}
199	}
200
201
202	// Channel strip setup formal initializer.
203	void ChannelStrip::setup ( Channel *pChannel )
204	{
205	// Destroy any previous channel descriptor;
206	// (remember that once setup we own it!)
207	if (m_pChannel)
208	delete m_pChannel;
209
210	// Set the new one...
211	m_pChannel = pChannel;
212
213	// Stabilize this around.
214	updateChannelInfo();
215
216	// We'll accept drops from now on...
217	if (m_pChannel)
218	setAcceptDrops(true);
219	}
220
221
222	// Channel secriptor accessor.
223	Channel *ChannelStrip::channel (void) const
224	{
225	return m_pChannel;
226	}
227
228
229	// Messages view font accessors.
230	QFont ChannelStrip::displayFont (void) const
231	{
232	return m_ui.EngineNameTextLabel->font();
233	}
234
235	void ChannelStrip::setDisplayFont ( const QFont & font )
236	{
237	m_ui.EngineNameTextLabel->setFont(font);
238	m_ui.MidiPortChannelTextLabel->setFont(font);
239	m_ui.InstrumentNameTextLabel->setFont(font);
240	m_ui.InstrumentStatusTextLabel->setFont(font);
241	}
242
243
244	// Channel display background effect.
245	void ChannelStrip::setDisplayEffect ( bool bDisplayEffect )
246	{
247	QPalette pal;
248	pal.setColor(QPalette::Foreground, Qt::yellow);
249	m_ui.EngineNameTextLabel->setPalette(pal);
250	m_ui.MidiPortChannelTextLabel->setPalette(pal);
251	pal.setColor(QPalette::Foreground, Qt::green);
252	if (bDisplayEffect) {
253	QPixmap pm(":/images/displaybg1.png");
254	pal.setBrush(QPalette::Background, QBrush(pm));
255	} else {
256	pal.setColor(QPalette::Background, Qt::black);
257	}
258	m_ui.ChannelInfoFrame->setPalette(pal);
259	m_ui.InstrumentNameTextLabel->setPalette(pal);
260	m_ui.StreamVoiceCountTextLabel->setPalette(pal);
261	}
262
263
264	// Maximum volume slider accessors.
265	void ChannelStrip::setMaxVolume ( int iMaxVolume )
266	{
267	m_iDirtyChange++;
268	m_ui.VolumeSlider->setRange(0, iMaxVolume);
269	m_ui.VolumeSpinBox->setRange(0, iMaxVolume);
270	m_iDirtyChange--;
271	}
272
273
274	// Channel setup dialog slot.
275	bool ChannelStrip::channelSetup (void)
276	{
277	if (m_pChannel == NULL)
278	return false;
279
280	// Invoke the channel setup dialog.
281	bool bResult = m_pChannel->channelSetup(this);
282	// Notify that this channel has changed.
283	if (bResult)
284	emit channelChanged(this);
285
286	return bResult;
287	}
288
289
290	// Channel mute slot.
291	bool ChannelStrip::channelMute ( bool bMute )
292	{
293	if (m_pChannel == NULL)
294	return false;
295
296	// Invoke the channel mute method.
297	bool bResult = m_pChannel->setChannelMute(bMute);
298	// Notify that this channel has changed.
299	if (bResult)
300	emit channelChanged(this);
301
302	return bResult;
303	}
304
305
306	// Channel solo slot.
307	bool ChannelStrip::channelSolo ( bool bSolo )
308	{
309	if (m_pChannel == NULL)
310	return false;
311
312	// Invoke the channel solo method.
313	bool bResult = m_pChannel->setChannelSolo(bSolo);
314	// Notify that this channel has changed.
315	if (bResult)
316	emit channelChanged(this);
317
318	return bResult;
319	}
320
321
322	// Channel edit slot.
323	void ChannelStrip::channelEdit (void)
324	{
325	if (m_pChannel == NULL)
326	return;
327
328	m_pChannel->editChannel();
329	}
330
331	bool ChannelStrip::channelFxEdit (void)
332	{
333	MainForm *pMainForm = MainForm::getInstance();
334	if (!pMainForm \|\| !channel())
335	return false;
336
337	pMainForm->appendMessages(QObject::tr("channel fx sends..."));
338
339	bool bResult = false;
340
341	#if CONFIG_FXSEND
342	ChannelFxForm *pChannelFxForm =
343	new ChannelFxForm(channel(), parentWidget());
344	if (pChannelFxForm) {
345	//pChannelForm->setup(this);
346	bResult = pChannelFxForm->exec();
347	delete pChannelFxForm;
348	}
349	#else // CONFIG_FXSEND
350	QMessageBox::critical(this,
351	QSAMPLER_TITLE ": " + tr("Unavailable"),
352	tr("Sorry, QSampler was built without FX send support!\n\n"
353	"(Make sure you have a recent liblscp when recompiling QSampler)"));
354	#endif // CONFIG_FXSEND
355
356	return bResult;
357	}
358
359	// Channel reset slot.
360	bool ChannelStrip::channelReset (void)
361	{
362	if (m_pChannel == NULL)
363	return false;
364
365	// Invoke the channel reset method.
366	bool bResult = m_pChannel->channelReset();
367	// Notify that this channel has changed.
368	if (bResult)
369	emit channelChanged(this);
370
371	return bResult;
372	}
373
374
375	// Update the channel instrument name.
376	bool ChannelStrip::updateInstrumentName ( bool bForce )
377	{
378	if (m_pChannel == NULL)
379	return false;
380
381	// Do we refresh the actual name?
382	if (bForce)
383	m_pChannel->updateInstrumentName();
384
385	// Instrument name...
386	if (m_pChannel->instrumentName().isEmpty()) {
387	if (m_pChannel->instrumentStatus() >= 0) {
388	m_ui.InstrumentNameTextLabel->setText(
389	' ' + Channel::loadingInstrument());
390	} else {
391	m_ui.InstrumentNameTextLabel->setText(
392	' ' + Channel::noInstrumentName());
393	}
394	} else {
395	m_ui.InstrumentNameTextLabel->setText(
396	' ' + m_pChannel->instrumentName());
397	}
398
399	return true;
400	}
401
402
403	// Do the dirty volume change.
404	bool ChannelStrip::updateChannelVolume (void)
405	{
406	if (m_pChannel == NULL)
407	return false;
408
409	// Convert...
410	int iVolume = ::lroundf(100.0f * m_pChannel->volume());
411	// And clip...
412	if (iVolume < 0)
413	iVolume = 0;
414
415	// Flag it here, to avoid infinite recursion.
416	m_iDirtyChange++;
417	m_ui.VolumeSlider->setValue(iVolume);
418	m_ui.VolumeSpinBox->setValue(iVolume);
419	m_iDirtyChange--;
420
421	return true;
422	}
423
424
425	// Update whole channel info state.
426	bool ChannelStrip::updateChannelInfo (void)
427	{
428	if (m_pChannel == NULL)
429	return false;
430
431	// Check for error limit/recycle...
432	if (m_iErrorCount > QSAMPLER_ERROR_LIMIT)
433	return true;
434
435	// Update strip caption.
436	QString sText = m_pChannel->channelName();
437	setWindowTitle(sText);
438	m_ui.ChannelSetupPushButton->setText('&' + sText);
439
440	// Check if we're up and connected.
441	MainForm* pMainForm = MainForm::getInstance();
442	if (pMainForm->client() == NULL)
443	return false;
444
445	// Read actual channel information.
446	m_pChannel->updateChannelInfo();
447
448	// Engine name...
449	if (m_pChannel->engineName().isEmpty()) {
450	m_ui.EngineNameTextLabel->setText(
451	' ' + Channel::noEngineName());
452	} else {
453	m_ui.EngineNameTextLabel->setText(
454	' ' + m_pChannel->engineName());
455	}
456
457	// Instrument name...
458	updateInstrumentName(false);
459
460	// MIDI Port/Channel...
461	QString sMidiPortChannel = QString::number(m_pChannel->midiPort()) + " / ";
462	if (m_pChannel->midiChannel() == LSCP_MIDI_CHANNEL_ALL)
463	sMidiPortChannel += tr("All");
464	else
465	sMidiPortChannel += QString::number(m_pChannel->midiChannel() + 1);
466	m_ui.MidiPortChannelTextLabel->setText(sMidiPortChannel);
467
468	// Common palette...
469	QPalette pal;
470	const QColor& rgbFore = pal.color(QPalette::Foreground);
471
472	// Instrument status...
473	int iInstrumentStatus = m_pChannel->instrumentStatus();
474	if (iInstrumentStatus < 0) {
475	pal.setColor(QPalette::Foreground, Qt::red);
476	m_ui.InstrumentStatusTextLabel->setPalette(pal);
477	m_ui.InstrumentStatusTextLabel->setText(
478	tr("ERR%1").arg(iInstrumentStatus));
479	m_iErrorCount++;
480	return false;
481	}
482	// All seems normal...
483	pal.setColor(QPalette::Foreground,
484	iInstrumentStatus < 100 ? Qt::yellow : Qt::green);
485	m_ui.InstrumentStatusTextLabel->setPalette(pal);
486	m_ui.InstrumentStatusTextLabel->setText(
487	QString::number(iInstrumentStatus) + '%');
488	m_iErrorCount = 0;
489
490	#ifdef CONFIG_MUTE_SOLO
491	// Mute/Solo button state coloring...
492	bool bMute = m_pChannel->channelMute();
493	const QColor& rgbButton = pal.color(QPalette::Button);
494	const QColor& rgbButtonText = pal.color(QPalette::ButtonText);
495	pal.setColor(QPalette::Foreground, rgbFore);
496	pal.setColor(QPalette::Button, bMute ? Qt::yellow : rgbButton);
497	pal.setColor(QPalette::ButtonText, bMute ? Qt::darkYellow : rgbButtonText);
498	m_ui.ChannelMutePushButton->setPalette(pal);
499	m_ui.ChannelMutePushButton->setDown(bMute);
500	bool bSolo = m_pChannel->channelSolo();
501	pal.setColor(QPalette::Button, bSolo ? Qt::cyan : rgbButton);
502	pal.setColor(QPalette::ButtonText, bSolo ? Qt::darkCyan : rgbButtonText);
503	m_ui.ChannelSoloPushButton->setPalette(pal);
504	m_ui.ChannelSoloPushButton->setDown(bSolo);
505	#else
506	m_ui.ChannelMutePushButton->setEnabled(false);
507	m_ui.ChannelSoloPushButton->setEnabled(false);
508	#endif
509
510	// And update the both GUI volume elements;
511	// return success if, and only if, intrument is fully loaded...
512	return updateChannelVolume() && (iInstrumentStatus == 100);
513	}
514
515
516	// Update whole channel usage state.
517	bool ChannelStrip::updateChannelUsage (void)
518	{
519	if (m_pChannel == NULL)
520	return false;
521
522	MainForm *pMainForm = MainForm::getInstance();
523	if (pMainForm->client() == NULL)
524	return false;
525
526	// This only makes sense on fully loaded channels...
527	if (m_pChannel->instrumentStatus() < 100)
528	return false;
529
530	// Get current channel voice count.
531	int iVoiceCount = ::lscp_get_channel_voice_count(
532	pMainForm->client(), m_pChannel->channelID());
533	// Get current stream count.
534	int iStreamCount = ::lscp_get_channel_stream_count(
535	pMainForm->client(), m_pChannel->channelID());
536	// Get current channel buffer fill usage.
537	// As benno has suggested this is the percentage usage
538	// of the least filled buffer stream...
539	int iStreamUsage = ::lscp_get_channel_stream_usage(
540	pMainForm->client(), m_pChannel->channelID());;
541
542	// Update the GUI elements...
543	m_ui.StreamUsageProgressBar->setValue(iStreamUsage);
544	m_ui.StreamVoiceCountTextLabel->setText(
545	QString("%1 / %2").arg(iStreamCount).arg(iVoiceCount));
546
547	// We're clean.
548	return true;
549	}
550
551
552	// Volume change slot.
553	void ChannelStrip::volumeChanged ( int iVolume )
554	{
555	if (m_pChannel == NULL)
556	return;
557
558	// Avoid recursion.
559	if (m_iDirtyChange > 0)
560	return;
561
562	// Convert and clip.
563	float fVolume = (float) iVolume / 100.0f;
564	if (fVolume < 0.001f)
565	fVolume = 0.0f;
566
567	// Update the GUI elements.
568	if (m_pChannel->setVolume(fVolume)) {
569	updateChannelVolume();
570	emit channelChanged(this);
571	}
572	}
573
574
575	// Context menu event handler.
576	void ChannelStrip::contextMenuEvent( QContextMenuEvent *pEvent )
577	{
578	if (m_pChannel == NULL)
579	return;
580
581	// We'll just show up the main form's edit menu (thru qsamplerChannel).
582	m_pChannel->contextMenuEvent(pEvent);
583	}
584
585
586	void ChannelStrip::midiActivityLedOn (void)
587	{
588	m_ui.MidiActivityLabel->setPixmap(*g_pMidiActivityLedOn);
589	m_pMidiActivityTimer->start(100);
590	}
591
592
593	void ChannelStrip::midiActivityLedOff (void)
594	{
595	m_ui.MidiActivityLabel->setPixmap(*g_pMidiActivityLedOff);
596	}
597
598
599	// Error count hackish accessors.
600	void ChannelStrip::resetErrorCount (void)
601	{
602	m_iErrorCount = 0;
603	}
604
605
606	// Channel strip activation/selection.
607	void ChannelStrip::setSelected ( bool bSelected )
608	{
609	if (bSelected) {
610	if (g_pSelectedStrip == this)
611	return;
612	if (g_pSelectedStrip)
613	g_pSelectedStrip->setSelected(false);
614	g_pSelectedStrip = this;
615	} else {
616	if (g_pSelectedStrip == this)
617	g_pSelectedStrip = NULL;
618	}
619
620	QPalette pal;
621	if (bSelected) {
622	const QColor& color = pal.midlight().color();
623	pal.setColor(QPalette::Background, color.dark(150));
624	pal.setColor(QPalette::Foreground, color.light(150));
625	}
626	QWidget::setPalette(pal);
627	}
628
629
630	bool ChannelStrip::isSelected (void) const
631	{
632	return (this == g_pSelectedStrip);
633	}
634
635
636	} // namespace QSampler
637
638
639	// end of qsamplerChannelStrip.cpp