Git commit 2bb78af4dc8335b083db27791bd4b1ea940c31fb by Alexander Semke.
Committed on 31/08/2014 at 21:49.
Pushed by asemke into branch 'master'.

Drop lines to the zero line.

M  +8    -0    src/backend/worksheet/plots/cartesian/XYCurve.cpp
M  +1    -1    src/backend/worksheet/plots/cartesian/XYCurve.h
M  +1    -0    src/kdefrontend/dockwidgets/XYCurveDock.cpp

http://commits.kde.org/labplot/2bb78af4dc8335b083db27791bd4b1ea940c31fb

diff --git a/src/backend/worksheet/plots/cartesian/XYCurve.cpp b/src/backen=
d/worksheet/plots/cartesian/XYCurve.cpp
index 7db8f54..662b693 100644
--- a/src/backend/worksheet/plots/cartesian/XYCurve.cpp
+++ b/src/backend/worksheet/plots/cartesian/XYCurve.cpp
@@ -1028,6 +1028,14 @@ void XYCurvePrivate::updateDropLines(){
 		}
 		break;
 	  }
+	  case XYCurve::DropLineXToZero:{
+		for(int i=3D0; i<symbolPointsLogical.size(); ++i){
+			if (!visiblePoints[i]) continue;
+			const QPointF& point =3D symbolPointsLogical.at(i);
+			lines.append(QLineF(point, QPointF(point.x(), 0)));
+		}
+		break;
+	  }
 	  default:
 		break;
 	}
diff --git a/src/backend/worksheet/plots/cartesian/XYCurve.h b/src/backend/=
worksheet/plots/cartesian/XYCurve.h
index 1af647a..a0caee8 100644
--- a/src/backend/worksheet/plots/cartesian/XYCurve.h
+++ b/src/backend/worksheet/plots/cartesian/XYCurve.h
@@ -45,7 +45,7 @@ class XYCurve: public AbstractWorksheetElement {
 	public:
 		enum LineType {NoLine, Line, StartHorizontal, StartVertical, MidpointHor=
izontal, MidpointVertical, Segments2, Segments3,
 					   SplineCubicNatural, SplineCubicPeriodic, SplineAkimaNatural, Splin=
eAkimaPeriodic};
-		enum DropLineType {NoDropLine, DropLineX, DropLineY, DropLineXY};
+		enum DropLineType {NoDropLine, DropLineX, DropLineY, DropLineXY, DropLin=
eXToZero};
 		enum ValuesType {NoValues, ValuesX, ValuesY, ValuesXY, ValuesXYBracketed=
, ValuesCustomColumn};
 		enum ValuesPosition {ValuesAbove, ValuesUnder, ValuesLeft, ValuesRight};
 		enum ErrorType {NoError, SymmetricError, AsymmetricError};
diff --git a/src/kdefrontend/dockwidgets/XYCurveDock.cpp b/src/kdefrontend/=
dockwidgets/XYCurveDock.cpp
index 0ace198..1a6ef65 100644
--- a/src/kdefrontend/dockwidgets/XYCurveDock.cpp
+++ b/src/kdefrontend/dockwidgets/XYCurveDock.cpp
@@ -345,6 +345,7 @@ void XYCurveDock::init(){
 	ui.cbDropLineType->addItem(i18n("drop lines, X"));
 	ui.cbDropLineType->addItem(i18n("drop lines, Y"));
 	ui.cbDropLineType->addItem(i18n("drop lines, XY"));
+	ui.cbDropLineType->addItem(i18n("drop lines, X, to zero line"));
 	GuiTools::updatePenStyles(ui.cbDropLineStyle, Qt::black);
 =

 	//Symbols