some bugfixes for editing multiline geometries

mhugent · mhugent · commit 0314c97cc25a · 2006-05-04T14:20:45.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@5418 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/core/qgsgeometry.cpp b/src/core/qgsgeometry.cpp
@@ -642,6 +642,8 @@ bool QgsGeometry::deleteVertexAt(QgsGeometryVertexIndex atVertex)
 	int pointindex = 0;
 	for(int linenr = 0; linenr < *nLines; ++linenr)
 	  {
+	    ptr += (sizeof(int) + 1);
+	    newBufferPtr += (sizeof(int) + 1);
 	    nPoints = (int*)ptr;
 	    ptr += sizeof(int);
 	    int newNPoint;
@@ -660,6 +662,7 @@ bool QgsGeometry::deleteVertexAt(QgsGeometryVertexIndex atVertex)
 		newNPoint = *nPoints;
 	      }
 	    memcpy(newBufferPtr, &newNPoint, sizeof(int));
+	    newBufferPtr += sizeof(int);
 
 	    for(int pointnr = 0; pointnr < *nPoints; ++pointnr)
 	      {
@@ -873,6 +876,47 @@ bool QgsGeometry::insertVertexBefore(double x, double y, QgsGeometryVertexIndex
       }
     case QGis::WKBMultiLineString:
       {
+	int* nLines = (int*)ptr;
+	int* nPoints = 0; //number of points in a line
+	ptr += sizeof(int);
+	memcpy(newBufferPtr, nLines, sizeof(int));
+	newBufferPtr += sizeof(int);
+	int pointindex = 0;
+
+	for(int linenr = 0; linenr < *nLines; ++linenr)
+	  {
+	    ptr += (sizeof(int) + 1);
+	    newBufferPtr += (sizeof(int) + 1);
+	    nPoints = (int*)ptr;
+	    int newNPoints;
+	    if(vertexnr >= pointindex && vertexnr < (pointindex + (*nPoints)))//point is in this ring
+	      {
+		newNPoints = (*nPoints)+1;
+	      }
+	    else
+	      {
+		newNPoints = *nPoints;
+	      }
+	    memcpy(newBufferPtr, &newNPoints, sizeof(double));
+	    newBufferPtr += sizeof(int);
+	    ptr += sizeof(int);
+
+	    for(int pointnr = 0; pointnr < *nPoints; ++pointnr)
+	      {
+		memcpy(newBufferPtr, ptr, sizeof(double));//x
+		memcpy(newBufferPtr+sizeof(double), ptr+sizeof(double), sizeof(double));//y
+		ptr += 2*sizeof(double);
+		newBufferPtr += 2*sizeof(double);
+		++pointindex;
+		if(pointindex == vertexnr)
+		  {
+		    memcpy(newBufferPtr, &x, sizeof(double));
+		    memcpy(newBufferPtr+sizeof(double), &y, sizeof(double));
+		    newBufferPtr += 2*sizeof(double);
+		    success = true;
+		  }
+	      }
+	  }
 	break;
       }
     case QGis::WKBPolygon:
