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nyalldawsonnyalldawson
committedNov 22, 2016
[FEATURE] Expression variables for project CRS
Adds @project_crs and @project_crs_definition variables for retrieving the current project CRS
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ltr-3_40final-3_0_0
1 parent 271e67e commit 188033a

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‎src/core/qgsexpression.cpp

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@@ -5712,6 +5712,8 @@ void QgsExpression::initVariableHelp()
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gVariableHelpTexts.insert( QStringLiteral( "project_path" ), QCoreApplication::translate( "variable_help", "Full path (including file name) of current project." ) );
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gVariableHelpTexts.insert( QStringLiteral( "project_folder" ), QCoreApplication::translate( "variable_help", "Folder for current project." ) );
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gVariableHelpTexts.insert( QStringLiteral( "project_filename" ), QCoreApplication::translate( "variable_help", "Filename of current project." ) );
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gVariableHelpTexts.insert( QStringLiteral( "project_crs" ), QCoreApplication::translate( "variable_help", "Coordinate reference system of project (eg 'EPSG:4326')." ) );
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gVariableHelpTexts.insert( QStringLiteral( "project_crs_definition" ), QCoreApplication::translate( "variable_help", "Coordinate reference system of project (full definition)." ) );
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//layer variables
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gVariableHelpTexts.insert( QStringLiteral( "layer_name" ), QCoreApplication::translate( "variable_help", "Name of current layer." ) );

‎src/core/qgsexpressioncontext.cpp

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@@ -644,6 +644,9 @@ QgsExpressionContextScope* QgsExpressionContextUtils::projectScope()
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scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_path" ), project->fileInfo().filePath(), true ) );
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scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_folder" ), project->fileInfo().dir().path(), true ) );
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scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_filename" ), project->fileInfo().fileName(), true ) );
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QgsCoordinateReferenceSystem projectCrs = project->crs();
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scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_crs" ), projectCrs.authid(), true ) );
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scope->addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "project_crs_definition" ), projectCrs.toProj4(), true ) );
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scope->addFunction( QStringLiteral( "project_color" ), new GetNamedProjectColor() );
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return scope;

1 commit comments

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 (1)

m-kuhn commented on Nov 22, 2016

@m-kuhn
m-kuhn
on Nov 22, 2016
Member

I was thinking, would it make sense to also expose the canvas crs (thinking about @ahuarte47 work on multi canvas or maybe different maps in the print composer)

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