void QgsMeasureDialog::mouseMove( QgsPoint &point )
{
QSettings settings;
int decimalPlaces = settings.value( "/qgis/measure/decimalplaces", "3" ).toInt();
// Create QgsDistance Area for customization ProjectionEnabled setting
QgsDistanceArea myDa;
configureDistanceArea( myDa );
// show current distance/area while moving the point
// by creating a temporary copy of point array
// and adding moving point at the end
if ( mMeasureArea && mTool->points().size() > 1 )
{
QList<QgsPoint> tmpPoints = mTool->points();
tmpPoints.append( point );
double area = myDa.measurePolygon( tmpPoints );
editTotal->setText( formatArea( area, decimalPlaces ) );
}
else if ( !mMeasureArea && mTool->points().size() > 0 )
{
QgsPoint p1( mTool->points().last() ), p2( point );
double d = myDa.measureLine( p1, p2 );
editTotal->setText( formatDistance( mTotal + d, decimalPlaces ) );
QGis::UnitType myDisplayUnits;
// Ignore units
convertMeasurement( d, myDisplayUnits, false );
QTreeWidgetItem *item = mTable->topLevelItem( mTable->topLevelItemCount() - 1 );
item->setText( 0, QLocale::system().toString( d, 'f', decimalPlaces ) );
}
}
void TestQgsDistanceArea::emptyPolygon()
{
QgsDistanceArea da;
da.setSourceCrs( 3452 );
da.setEllipsoidalMode( true );
da.setEllipsoid( "WGS84" );
//test that measuring an empty polygon doesn't crash
da.measurePolygon( QList< QgsPoint >() );
}
void QgsMeasureDialog::addPoint( QgsPoint &point )
{
QSettings settings;
int decimalPlaces = settings.value( "/qgis/measure/decimalplaces", "3" ).toInt();
// Create QgsDistance Area for customization ProjectionEnabled setting
QgsDistanceArea myDa;
configureDistanceArea( myDa );
int numPoints = mTool->points().size();
if ( mMeasureArea && numPoints > 2 )
{
double area = myDa.measurePolygon( mTool->points() );
editTotal->setText( formatArea( area, decimalPlaces ) );
}
else if ( !mMeasureArea && numPoints > 1 )
{
int last = numPoints - 2;
QgsPoint p1 = mTool->points()[last], p2 = mTool->points()[last+1];
double d = myDa.measureLine( p1, p2 );
mTotal += d;
editTotal->setText( formatDistance( mTotal, decimalPlaces ) );
QGis::UnitType myDisplayUnits;
// Ignore units
convertMeasurement( d, myDisplayUnits, false );
QTreeWidgetItem *item = mTable->topLevelItem( mTable->topLevelItemCount() - 1 );
item->setText( 0, QLocale::system().toString( d, 'f', decimalPlaces ) );
item = new QTreeWidgetItem( QStringList( QLocale::system().toString( 0.0, 'f', decimalPlaces ) ) );
item->setTextAlignment( 0, Qt::AlignRight );
mTable->addTopLevelItem( item );
mTable->scrollToItem( item );
}
}
void QgsMeasureDialog::changeProjectionEnabledState()
{
// store value
QSettings settings;
if ( mcbProjectionEnabled->isChecked() )
settings.setValue( "/qgis/measure/projectionEnabled", 2 );
else
settings.setValue( "/qgis/measure/projectionEnabled", 0 );
// clear interface
mTable->clear();
QTreeWidgetItem* item = new QTreeWidgetItem( QStringList( QString::number( 0, 'f', 1 ) ) );
item->setTextAlignment( 0, Qt::AlignRight );
mTable->addTopLevelItem( item );
mTotal = 0;
updateUi();
int decimalPlaces = settings.value( "/qgis/measure/decimalplaces", "3" ).toInt();
// create DistanceArea
QgsDistanceArea myDa;
configureDistanceArea( myDa );
if ( mMeasureArea )
{
double area = 0.0;
if ( mTool->points().size() > 1 )
{
area = myDa.measurePolygon( mTool->points() );
}
editTotal->setText( formatArea( area, decimalPlaces ) );
}
else
{
QList<QgsPoint>::const_iterator it;
bool b = true; // first point
QgsPoint p1, p2;
for ( it = mTool->points().constBegin(); it != mTool->points().constEnd(); ++it )
{
p2 = *it;
if ( !b )
{
double d = myDa.measureLine( p1, p2 );
mTotal += d;
editTotal->setText( formatDistance( mTotal, decimalPlaces ) );
QGis::UnitType myDisplayUnits;
convertMeasurement( d, myDisplayUnits, false );
QTreeWidgetItem *item = mTable->topLevelItem( mTable->topLevelItemCount() - 1 );
item->setText( 0, QLocale::system().toString( d, 'f', decimalPlaces ) );
item = new QTreeWidgetItem( QStringList( QLocale::system().toString( 0.0, 'f', decimalPlaces ) ) );
item->setTextAlignment( 0, Qt::AlignRight );
mTable->addTopLevelItem( item );
mTable->scrollToItem( item );
}
p1 = p2;
b = false;
}
}
}