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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commite2de64d6f1beb9e492daf5b886e19933c1fa41dd (patch)
tree9047cf9e6b5c43878d5bf82660adae77ceee097a /arts/tools/levelmeters.cpp
downloadtdemultimedia-e2de64d6f1beb9e492daf5b886e19933c1fa41dd.tar.gz
tdemultimedia-e2de64d6f1beb9e492daf5b886e19933c1fa41dd.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'arts/tools/levelmeters.cpp')
-rw-r--r--arts/tools/levelmeters.cpp239
1 files changed, 239 insertions, 0 deletions
diff --git a/arts/tools/levelmeters.cpp b/arts/tools/levelmeters.cpp
new file mode 100644
index 00000000..3b2ca1ac
--- /dev/null
+++ b/arts/tools/levelmeters.cpp
@@ -0,0 +1,239 @@
+#include <qlayout.h>
+#include <qpainter.h>
+#include <qfontmetrics.h>
+#include <qptrlist.h>
+#include <kled.h>
+#include "levelmeters.h"
+
+const int PeakBar::peakMillis=1500;
+
+PeakBar::PeakBar(QWidget *parent)
+ : ACLevelMeter(parent)
+ , maxValue( 0.0f )
+ , minValue( 0.0f )
+{
+ clipped = false;
+ displayMinPeak= false;
+ horizontalMode= false;
+ currentValue= 0.0f;
+
+ lastValues.setAutoDelete( TRUE );
+
+ setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
+ setSizePolicy(QSizePolicy(QSizePolicy::Maximum, QSizePolicy::Preferred));
+ setBackgroundMode(NoBackground);
+ setMinimumSize(frameWidth()+7, 70);
+}
+
+void PeakBar::frameChanged() {
+ setMinimumSize(frameWidth()+7, 70);
+ QFrame::frameChanged();
+}
+
+QSize PeakBar::sizeHint() const {
+ return QSize(13, 250);
+}
+
+void PeakBar::checkMinMax() {
+ int mustRecheck= 0; // bool
+ Observation *o;
+
+ while ((o= lastValues.first()) && o->time.elapsed() > peakMillis) {
+ lastValues.removeFirst();
+ mustRecheck= 1;
+ }
+
+ if (mustRecheck) {
+ maxValue= 0.f;
+ minValue= 1.f;
+ clipped = false;
+ for (QPtrListIterator<Observation> it(lastValues); it.current(); ++it) {
+ float value= it.current()->value;
+ if (value>maxValue)
+ maxValue= value;
+ if (value<minValue)
+ minValue= value;
+ if (value > 1.f)
+ clipped = true;
+ }
+ }
+}
+
+void PeakBar::drawContents(QPainter *p)
+{
+ QRect size= contentsRect();
+
+ checkMinMax();
+
+ p->setBrush(clipped ? darkRed : darkBlue);
+ p->setPen(NoPen);
+ p->drawRect(size);
+
+ QRect bar= size;
+ p->setBrush(clipped ? red : blue);
+ if (horizontalMode) {
+ bar.setWidth((int)(bar.width()*currentValue));
+ } else {
+ int newHeight= (int)(bar.height()*currentValue);
+ bar.moveBy(0, bar.height()-newHeight);
+ bar.setHeight(newHeight);
+ }
+ p->drawRect(bar);
+
+ int y;
+ // TODO: if (horizontalMode)
+ if (displayMinPeak) {
+ y= frameWidth()+size.height()-((int)(size.height()*minValue));
+ p->setPen(white);
+ p->drawLine(frameWidth(), y, frameWidth()+size.width()-1, y);
+ }
+ y= frameWidth()+size.height()-((int)(size.height()*maxValue));
+ p->setPen(white);
+ p->drawLine(frameWidth(), y, frameWidth()+size.width()-1, y);
+}
+
+void PeakBar::setValue(float f) {
+ if (f > 1.f)
+ clipped = true;
+
+ currentValue= f;
+ if (f>=maxValue)
+ maxValue= f;
+ if (displayMinPeak && (f<=minValue))
+ minValue= f;
+
+ lastValues.append(new Observation(f));
+
+ repaint();
+}
+
+// -------------------------------------------------------------
+
+PeakLevelMeters::PeakLevelMeters(QWidget *parent):
+ StereoLevelMeter(parent), left(this), right(this), scaleView(this)
+{
+ QBoxLayout *layout= new QHBoxLayout(this);
+ layout->addWidget(&left);
+ // layout->setStretchFactor(&left, 0);
+ layout->addWidget(&right);
+ // layout->setStretchFactor(&right, 0);
+ layout->addWidget(&scaleView);
+ // layout->setStretchFactor(&scaleView, 0);
+ left.setLineWidth(2);
+ right.setLineWidth(2);
+ scaleView.setScaleMargins(right.frameWidth());
+ setSizePolicy(QSizePolicy(QSizePolicy::Maximum, QSizePolicy::Preferred));
+
+ setDbRange(36);
+}
+
+void PeakLevelMeters::setDbRange(int db) {
+ dbRange= db;
+ scaleView.setDbRange(db);
+}
+
+void PeakLevelMeters::setValues(float leftVal, float rightVal) {
+ float f= 1.0f+levelToDB(leftVal)/dbRange;
+ if (f<0.f) f= 0.f;
+ left.setValue(f);
+
+ f= 1.0f+levelToDB(rightVal)/dbRange;
+ if (f<0.f) f= 0.f;
+ right.setValue(f);
+}
+
+ScaleView::ScaleView(QWidget *parent): QFrame(parent) {
+ font.setPixelSize(10);
+ setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred));
+}
+
+void ScaleView::setDbRange(int db) {
+ dbRange= db;
+ repaint();
+}
+
+QSize ScaleView::sizeHint() const {
+ return QSize(QFontMetrics(font).width("-88")+8, 250);
+}
+
+void ScaleView::drawContents(QPainter *p) {
+ QRect size= contentsRect();
+ size.rTop()+= upperMargin;
+ size.rBottom()-= lowerMargin;
+
+ QFrame::drawContents(p); // clear background
+
+ int step=3;
+ while (dbRange/step*20>size.height())
+ step*=2;
+
+ /* float offset= ((float)size.height()*step)/dbRange, pos=0.f;
+ p->setPen(black);
+ p->drawLine(0, (, size.width()*3/5, y);*/
+
+ p->setPen(black);
+ p->setFont(font);
+ QString numStr;
+ for (int i=0; i<=dbRange; i++) {
+ int y= size.top()+(size.height()-1)*i/dbRange;
+ if (i%step==0) {
+ p->drawLine(0, y, 4, y);
+ numStr.setNum(-i);
+ p->drawText(8, y+5, numStr);
+ } else
+ p->drawLine(0, y, 2, y);
+ }
+}
+
+// -------------------------------------------------------------
+
+LedMeter::LedMeter(QWidget *parent, bool blueState) : ACLevelMeter(parent) {
+ setBackgroundColor(black);
+ QBoxLayout * l = new QVBoxLayout( this );
+ l->setAutoAdd(TRUE);
+ for(int i=0;i<12;i++) {
+ QColor c;
+ if(blueState)
+ c = blue;
+ else {
+ c = red;
+ if(i>=2) c = yellow;
+ if(i>=5) c = green;
+ }
+
+ // put each led in its own frame, since it seems to be broken
+ QFrame *lframe = new QFrame(this);
+ QBoxLayout *lfl = new QVBoxLayout( lframe );
+ lfl->setAutoAdd(TRUE);
+ leds[i] =
+ new KLed(c,KLed::Off, KLed::Sunken, KLed::Circular,lframe);
+ }
+}
+
+void LedMeter::setValue(float f)
+{
+ //printf("value %f\n",f);
+ for(int i=11;i>=0;i--)
+ {
+ if(f > 0.06) leds[i]->setState(KLed::On);
+ else leds[i]->setState(KLed::Off);
+ f /= 1.25;
+ }
+}
+
+// -------------------------------------------------------------
+
+StereoLedMeters::StereoLedMeters(QWidget *parent)
+ : StereoLevelMeter(parent), left(this), right(this)
+{
+ QBoxLayout *layout= new QHBoxLayout(this);
+ layout->addWidget(&left);
+ layout->addWidget(&right);
+}
+
+void StereoLedMeters::setValues(float leftVal, float rightVal) {
+ left.setValue(leftVal);
+ right.setValue(rightVal);
+}
+
+#include "levelmeters.moc"