Fill area under logical 1s in TraceWidget digital mode

diff --git a/clients/tde/src/part/logicanalyzer/part.cpp b/clients/tde/src/part/logicanalyzer/part.cpp
index 28f2c3f..97da2e3 100644
--- a/clients/tde/src/part/logicanalyzer/part.cpp
+++ b/clients/tde/src/part/logicanalyzer/part.cpp
@@ -1271,6 +1271,7 @@
 		m_traceWidget->setTraceVerticalUnits(traceno-1, "", true);
 
 		m_traceWidget->setNumberOfSamples(traceno-1, m_samplesInTrace[traceno], true);
+		m_traceWidget->setDigitalTraceMode(traceno-1, true, true);
 
 		m_traceWidget->setDisplayLimits(traceno-1, TQRectF(0.0, (m_voltsDiv[traceno]*m_vdivs)/2.0, (m_secsDiv[traceno]*m_hdivs), (m_voltsDiv[traceno]*m_vdivs)/-2.0), (traceno<m_maxNumberOfTraces)?true:false);
 	}
diff --git a/clients/tde/src/widgets/tracewidget.cpp b/clients/tde/src/widgets/tracewidget.cpp
index b0d2e6e..3bbcb03 100644
--- a/clients/tde/src/widgets/tracewidget.cpp
+++ b/clients/tde/src/widgets/tracewidget.cpp
@@ -288,6 +288,7 @@
 	traceName = i18n("Unknown");
 	horizontalUnits = i18n("Units");
 	verticalUnits = i18n("Units");
+	m_digitalTraceDrawing = false;
 	enabled = false;
 
 	if (labelParent) {
@@ -387,7 +388,7 @@
 		unsigned int n;
 		unsigned int incr;
 		unsigned int activeSamples;
-		int x,y,x2,y2,horizoffset;
+		int x,y,x2,y2,baseline,horizoffset;
 
 		// Obtain horizontal scrolling offset
 		horizoffset = parentWidget->horizScrollOffset();
@@ -419,6 +420,7 @@
 			y = ((((sampleArray[n]+offset)-topEdge)/(bottomEdge-topEdge))*(virtual_height));
 			x2 = (((positionArray[n+incr]-leftEdge)/(rightEdge-leftEdge))*(virtual_width))-horizoffset;
 			y2 = ((((sampleArray[n+incr]+offset)-topEdge)/(bottomEdge-topEdge))*(virtual_height));
+			baseline = ((((offset)-topEdge)/(bottomEdge-topEdge))*(virtual_height));
 
 			// Do not draw lines that are placed fully off the screen
 			if ((x < 0) && (x2 < 0)) continue;
@@ -435,9 +437,42 @@
 			if (x2 > (virtual_width-horizoffset)) x2 = (virtual_width-horizoffset);
 			if (y2 < 0) y2 = 0;
 			if (y2 > virtual_height) y2 = virtual_height;
+			if (baseline < 0) baseline = 0;
+			if (baseline > virtual_height) baseline = virtual_height;
 
-			// Draw line!
-			p->drawLine(x, y, x2, y2);
+			// Draw line(s)!
+			if (m_digitalTraceDrawing) {
+				p->drawLine(x+1, y, x2-1, y);
+				p->drawLine(x2-1, y, x2+1, y2);
+
+				// Draw fill areas
+				if ((sampleArray[n] != 0) && (sampleArray[n+1] != 0)) {
+					p->save();
+					p->fillRect(x+1, y+1, x2-x, baseline-y-1, TQBrush(color.dark(400)));
+					p->restore();
+				}
+				else if ((sampleArray[n] != 0) && (sampleArray[n+1] == 0)) {
+					p->save();
+					// Fill sloping edges
+					p->setPen(color.dark(400));
+					p->drawLine(x2-3, y+1, x2-1, y2-1);
+					p->drawLine(x2-2, y+1, x2, y2-1);
+					// Fill rectangle under trace
+					p->fillRect(x+2, y+1, (x2-1)-(x+1)-1, baseline-y-1, TQBrush(color.dark(400)));
+					p->restore();
+				}
+				else if ((sampleArray[n] == 0) && (sampleArray[n+1] != 0)) {
+					p->save();
+					// Fill sloping edges
+					p->setPen(color.dark(400));
+					p->drawLine(x2+1, y+1, x2+3, y2-1);
+					p->drawLine(x2, y+1, x2+2, y2-1);
+					p->restore();
+				}
+			}
+			else {
+				p->drawLine(x, y, x2, y2);
+			}
 		}
 
 		// Draw the zero level indicator
@@ -800,7 +835,7 @@
 	p.fillRect(0, 0, m_graticulePixmap->width(), m_graticulePixmap->height(), backgroundColor());
 	p.setPen(TQPen(foregroundColor(), 1, TQt::DotLine));
 	if (m_base->m_horizDivs > 0) {
-		s = m_graticulePixmap->width() / m_base->m_horizDivs;
+		s = virtualWidth() / m_base->m_horizDivs;
 		x = 0;
 		for (d=0; d<m_base->m_horizDivs; d++) {
 			rx = x - m_base->horizScrollOffset();
@@ -1222,6 +1257,17 @@
 	}
 }
 
+void TraceWidget::setDigitalTraceMode(uint traceNumber, bool enabled, bool deferUpdate) {
+	VERIFY_TRACE_ARRAY_SIZE
+
+	m_traceArray[traceNumber]->m_digitalTraceDrawing = enabled;
+
+	if (!deferUpdate) {
+		m_graticuleWidget->updateGraticule();
+		updateTraceText();
+	}
+}
+
 void TraceWidget::setNumberOfHorizontalDivisions(unsigned int divisions) {
 	m_horizDivs = divisions;
 	m_graticuleWidget->updateGraticule();
diff --git a/clients/tde/src/widgets/tracewidget.h b/clients/tde/src/widgets/tracewidget.h
index fabde7c..0afc9d4 100644
--- a/clients/tde/src/widgets/tracewidget.h
+++ b/clients/tde/src/widgets/tracewidget.h
@@ -82,6 +82,7 @@
 		TQString traceName;
 		TQString horizontalUnits;
 		TQString verticalUnits;
+		bool m_digitalTraceDrawing;
 		TQLabel* paramLabel;
 		TQLabel* leftLabel;
 		TQLabel* graphStatusLabel;
@@ -227,6 +228,7 @@
 		void setTraceHorizontalUnits(uint traceNumber, TQString units, bool deferUpdate=false);
 		TQString traceVerticalUnits(uint traceNumber);
 		void setTraceVerticalUnits(uint traceNumber, TQString units, bool deferUpdate=false);
+		void setDigitalTraceMode(uint traceNumber, bool enabled, bool deferUpdate=false);
 
 		double cursorPosition(uint cursorNumber);
 		void setCursorPosition(uint cursorNumber, double position);