qgsactionscoperegistry.cpp

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/***************************************************************************
  qgsactionscoperegistry.cpp - QgsActionScopeRegistry
 
 ---------------------
 begin                : 1.11.2016
 copyright            : (C) 2016 by Matthias Kuhn
 email                : [email protected]
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#include "qgsactionscoperegistry.h"
 
#include "qgsexpressioncontext.h"
 
QgsActionScopeRegistry::QgsActionScopeRegistry( QObject *parent )
  : QObject( parent )
{
  // Register some default action scopes:
 
  QgsExpressionContextScope canvasScope;
  canvasScope.addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "click_x" ), 25, true ) );
  canvasScope.addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "click_y" ), 30, true ) );
  mActionScopes.insert( QgsActionScope( QStringLiteral( "Canvas" ), tr( "Canvas" ), tr( "Available for the action map tool on the canvas." ), canvasScope ) );
 
  QgsExpressionContextScope fieldScope;
  fieldScope.addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "field_index" ), 0, true ) );
  fieldScope.addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "field_name" ), "[field_name]", true ) );
  fieldScope.addVariable( QgsExpressionContextScope::StaticVariable( QStringLiteral( "field_value" ), "[field_value]", true ) );
 
  mActionScopes.insert( QgsActionScope( QStringLiteral( "Field" ), tr( "Field" ), tr( "Available for individual fields. For example in the attribute table." ), fieldScope ) );
  mActionScopes.insert( QgsActionScope( QStringLiteral( "Feature" ), tr( "Feature" ), tr( "Available for individual features. For example on feature forms or per row in the attribute table." ) ) );
  mActionScopes.insert( QgsActionScope( QStringLiteral( "Layer" ), tr( "Layer" ), tr( "Available as layer global action. For example on top of the attribute table." ) ) );
  mActionScopes.insert( QgsActionScope( QStringLiteral( "Form" ), tr( "Form" ), tr( "Available only when connected to a form action button in a drag and drop attribute form." ) ) );
}
 
QSet<QgsActionScope> QgsActionScopeRegistry::actionScopes() const
{
  return mActionScopes;
}
 
void QgsActionScopeRegistry::registerActionScope( const QgsActionScope &actionScope )
{
  mActionScopes.insert( actionScope );
 
  emit actionScopesChanged();
}
 
void QgsActionScopeRegistry::unregisterActionScope( const QgsActionScope &actionScope )
{
  mActionScopes.remove( actionScope );
 
  emit actionScopesChanged();
}
 
QgsActionScope QgsActionScopeRegistry::actionScope( const QString &id )
{
  const auto constMActionScopes = mActionScopes;
  for ( const QgsActionScope &actionScope : constMActionScopes )
  {
    if ( actionScope.id() == id )
    {
      return actionScope;
    }
  }
 
  return QgsActionScope();
}