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[layouts] Show more precision in map scale for map item properties

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Previously we would often round the scale displayed to the nearest
integer. Now ensure that the map scale widget shows more decimals
to allow verification that the actual map scale exactly matches
the desired scale.

Fixes #20133
This commit is contained in:
Nyall Dawson 2018-10-19 10:09:53 +10:00
parent fb2883c79c
commit 0a662576a7
1 changed files with 7 additions and 3 deletions
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10
src/app/layout/qgslayoutmapwidget.cpp
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@ -483,7 +483,7 @@ void QgsLayoutMapWidget::mScaleLineEdit_editingFinished()
return;
}
if ( std::round( scaleDenominator ) == std::round( mMapItem->scale() ) )
if ( qgsDoubleNear( scaleDenominator, mMapItem->scale() ) )
return;
mMapItem->layout()->undoStack()->beginCommand( mMapItem, tr( "Change Map Scale" ) );
@ -604,11 +604,15 @@ void QgsLayoutMapWidget::updateGuiElements()
double scale = mMapItem->scale();
//round scale to an appropriate number of decimal places
if ( scale >= 10 )
if ( scale >= 10000 )
{
//round scale to integer if it's greater than 10
//round scale to integer if it's greater than 10000
mScaleLineEdit->setText( QLocale().toString( mMapItem->scale(), 'f', 0 ) );
}
else if ( scale >= 10 )
{
mScaleLineEdit->setText( QLocale().toString( mMapItem->scale(), 'f', 3 ) );
}
else if ( scale >= 1 )
{
//don't round scale if it's less than 10, instead use 4 decimal places