A widget for selecting a Coordinate reference system from a tree. More...

#include <qgsprojectionselector.h>

Public Slots
void	on_cbxHideDeprecated_stateChanged ()
void	on_leSearch_textChanged (const QString &)
void	on_lstCoordinateSystems_currentItemChanged (QTreeWidgetItem current, QTreeWidgetItem prev)
void	on_lstRecent_currentItemChanged (QTreeWidgetItem current, QTreeWidgetItem prev)
long	selectedCrsId ()
	Gets the current QGIS projection identfier.
QString	selectedName ()
long	selectedPostgresSrId ()
	Gets the current PostGIS-style projection identifier.
QString	selectedProj4String ()
void	setOgcWmsCrsFilter (QSet< QString > crsFilter)
	filters this widget by the given CRSs
void	setSelectedAuthId (QString authId)
void	setSelectedCrsId (long theCRSID)
void	setSelectedCrsName (QString theCRSName)
Signals
void	refresh ()
	Refresh any listening canvases.
void	searchBoxHasFocus (bool)
	Let listeners know if find has focus so they can adjust the default button.
void	sridSelected (QString theSRID)
Public Member Functions
	QgsProjectionSelector (QWidget parent, const char name="", Qt::WFlags fl=0)
	~QgsProjectionSelector ()
void	loadCrsList (QSet< QString > *crsFilter=0)
	Populate the proj tree view with system projection names...
void	loadUserCrsList (QSet< QString > *crsFilter=0)
	Populate the proj tree view with user defined projection names...
QString	selectedAuthId ()
	Gets the current authority-style projection identifier.
const QString	sqlSafeString (const QString theSQL)
	Make the string safe for use in SQL statements. This involves escaping single quotes, double quotes, backslashes, and optionally, percentage symbols. Percentage symbols are used as wildcards sometimes and so when using the string as part of the LIKE phrase of a select statement, should be escaped.
Protected Member Functions
void	resizeEvent (QResizeEvent *theEvent)
	Used to manage column sizes.
void	showEvent (QShowEvent *theEvent)
	Used to ensure the projection list view is actually populated.
Private Types
enum	columns { NAME_COLUMN, AUTHID_COLUMN, QGIS_CRS_ID_COLUMN, NONE }
Private Slots
QStringList	authorities ()
	get list of authorities
Private Member Functions
void	applySelection (int column=NONE, QString value=QString::null)
	does the legwork of applying CRS Selection
long	getLargestCRSIDMatch (QString theSql)
	Utility method used in conjunction with name based searching tool.
QString	getSelectedExpression (QString e)
	gets an arbitrary sqlite3 expression from the selection
void	hideDeprecated (QTreeWidgetItem *item)
	hide deprecated CRSes
void	insertRecent (long theCrsId)
	add recently used CRS
QString	ogcWmsCrsFilterAsSqlExpression (QSet< QString > *crsFilter)
	converts the CRS group to a SQL expression fragment
void	showDBMissingWarning (const QString theFileName)
	Show the user a warning if the srs database could not be found.
Private Attributes
QSet< QString >	mCrsFilter
	The set of OGC WMS CRSs that want to be applied to this widget.
QString	mCustomCsFile
	Users custom coordinate system file.
QTreeWidgetItem *	mGeoList
	GEOGCS node.
QTreeWidgetItem *	mProjList
	PROJCS node.
bool	mProjListDone
	Has the Projection List been populated?
QStringList	mRecentProjections
	Most recently used projections (trimmed at 25 entries)
bool	mRecentProjListDone
	Has the Recent Projection List been populated?
int	mSearchColumn
QString	mSearchValue
bool	mSkipFirstRecent
QString	mSrsDatabaseFileName
	File name of the sqlite3 database.
QTreeWidgetItem *	mUserProjList
	User defined projections node.
bool	mUserProjListDone
	Has the User Projection List been populated?

Detailed Description

A widget for selecting a Coordinate reference system from a tree.

See also:: QgsGenericProjectionSelector.

Author:: Tim Sutton

Definition at line 28 of file qgsprojectionselector.h.

Member Enumeration Documentation

enum QgsProjectionSelector::columns [private]

Enumerator:

NAME_COLUMN
AUTHID_COLUMN
QGIS_CRS_ID_COLUMN
NONE

Definition at line 180 of file qgsprojectionselector.h.

Constructor & Destructor Documentation

QgsProjectionSelector::QgsProjectionSelector	(	QWidget *	parent,
		const char *	name = `""`,
		Qt::WFlags	fl = `0`
	)

Definition at line 29 of file qgsprojectionselector.cpp.

References AUTHID_COLUMN, QgsCoordinateReferenceSystem::createFromOgcWmsCrs(), QgsCoordinateReferenceSystem::createFromProj4(), QgsCoordinateReferenceSystem::isValid(), mRecentProjections, mSrsDatabaseFileName, QGIS_CRS_ID_COLUMN, QgsDebugMsg, QgsApplication::srsDbFilePath(), and QgsCoordinateReferenceSystem::srsid().

QgsProjectionSelector::~QgsProjectionSelector ( )

Definition at line 95 of file qgsprojectionselector.cpp.

References QgsCoordinateReferenceSystem::InternalCrsId, mRecentProjections, selectedCrsId(), and QgsCoordinateReferenceSystem::toProj4().

Member Function Documentation

void QgsProjectionSelector::applySelection	(	int	column = `NONE`,
		QString	value = `QString::null`
	)		`[private]`

does the legwork of applying CRS Selection

Warning:: This function does nothing unless getUserList() and getUserProjList() Have already been called; This function only expands the parents of the selection and does not scroll the list to the selection if the widget is not visible. Therefore you will typically want to use this in a showEvent().

Definition at line 240 of file qgsprojectionselector.cpp.

References mProjListDone, mSearchColumn, mSearchValue, mUserProjListDone, NONE, and QgsDebugMsg.

Referenced by setSelectedAuthId(), setSelectedCrsId(), setSelectedCrsName(), and showEvent().

QStringList QgsProjectionSelector::authorities ( ) [private, slot]

get list of authorities

Definition at line 934 of file qgsprojectionselector.cpp.

References mSrsDatabaseFileName, and QgsDebugMsg.

long QgsProjectionSelector::getLargestCRSIDMatch ( QString theSql ) [private]

Utility method used in conjunction with name based searching tool.

Definition at line 865 of file qgsprojectionselector.cpp.

References mSrsDatabaseFileName, QgsApplication::qgisUserDbFilePath(), QgsDebugMsg, and showDBMissingWarning().

QString QgsProjectionSelector::getSelectedExpression ( QString e ) [private]

gets an arbitrary sqlite3 expression from the selection

Parameters:

e	The sqlite3 expression (typically "srid" or "sridid")

Definition at line 372 of file qgsprojectionselector.cpp.

References mSrsDatabaseFileName, QGIS_CRS_ID_COLUMN, QgsApplication::qgisUserDbFilePath(), QgsDebugMsg, showDBMissingWarning(), and USER_CRS_START_ID.

Referenced by selectedAuthId(), and selectedPostgresSrId().

void QgsProjectionSelector::hideDeprecated ( QTreeWidgetItem * item ) [private]

hide deprecated CRSes

Definition at line 772 of file qgsprojectionselector.cpp.

Referenced by on_cbxHideDeprecated_stateChanged().

void QgsProjectionSelector::insertRecent ( long theCrsId ) [private]

add recently used CRS

Definition at line 280 of file qgsprojectionselector.cpp.

References AUTHID_COLUMN, mProjListDone, mUserProjListDone, NAME_COLUMN, and QGIS_CRS_ID_COLUMN.

Referenced by showEvent().

void QgsProjectionSelector::loadCrsList ( QSet< QString > * crsFilter = 0 )

Populate the proj tree view with system projection names...

Parameters:

crsFilter a list of OGC Coordinate Reference Systems to filter the list of projections by. This is useful in (e.g.) WMS situations where you just want to offer what the WMS server can support.

Todo:: Should this be public?

Definition at line 554 of file qgsprojectionselector.cpp.

References QgsApplication::activeThemePath(), AUTHID_COLUMN, mGeoList, mProjList, mProjListDone, mSrsDatabaseFileName, NAME_COLUMN, ogcWmsCrsFilterAsSqlExpression(), QGIS_CRS_ID_COLUMN, showDBMissingWarning(), and tr.

Referenced by showEvent().

void QgsProjectionSelector::loadUserCrsList ( QSet< QString > * crsFilter = 0 )

Populate the proj tree view with user defined projection names...

Parameters:

crsFilter a list of OGC Coordinate Reference Systems to filter the list of projections by. This is useful in (e.g.) WMS situations where you just want to offer what the WMS server can support.

Todo:: Should this be public?

Definition at line 478 of file qgsprojectionselector.cpp.

References QgsApplication::activeThemePath(), AUTHID_COLUMN, mUserProjList, mUserProjListDone, ogcWmsCrsFilterAsSqlExpression(), QGIS_CRS_ID_COLUMN, QgsApplication::qgisUserDbFilePath(), QgsDebugMsg, showDBMissingWarning(), and tr.

Referenced by showEvent().

QString QgsProjectionSelector::ogcWmsCrsFilterAsSqlExpression ( QSet< QString > * crsFilter ) [private]

converts the CRS group to a SQL expression fragment

Converts the given Coordinate Reference Systems to a format suitable for use in SQL for querying against the QGIS CRS database.

Parameters:

crsFilter a list of OGC Coordinate Reference Systems to filter the list of projections by. This is useful in (e.g.) WMS situations where you just want to offer what the WMS server can support.

Definition at line 167 of file qgsprojectionselector.cpp.

References QgsDebugMsg.

Referenced by loadCrsList(), and loadUserCrsList().

void QgsProjectionSelector::on_cbxHideDeprecated_stateChanged ( ) [slot]

Definition at line 789 of file qgsprojectionselector.cpp.

References hideDeprecated().

void QgsProjectionSelector::on_leSearch_textChanged ( const QString & theFilterTxt ) [slot]

Definition at line 795 of file qgsprojectionselector.cpp.

References AUTHID_COLUMN, and NAME_COLUMN.

void QgsProjectionSelector::on_lstCoordinateSystems_currentItemChanged	(	QTreeWidgetItem *	current,
		QTreeWidgetItem *	prev
	)		`[slot]`

Definition at line 704 of file qgsprojectionselector.cpp.

References QGIS_CRS_ID_COLUMN, QgsDebugMsg, selectedCrsId(), selectedName(), selectedProj4String(), and sridSelected().

void QgsProjectionSelector::on_lstRecent_currentItemChanged	(	QTreeWidgetItem *	current,
		QTreeWidgetItem *	prev
	)		`[slot]`

Definition at line 749 of file qgsprojectionselector.cpp.

References mSkipFirstRecent, QGIS_CRS_ID_COLUMN, and QgsDebugMsg.

void QgsProjectionSelector::refresh ( ) [signal]

Refresh any listening canvases.

void QgsProjectionSelector::resizeEvent ( QResizeEvent * theEvent ) [protected]

Used to manage column sizes.

Definition at line 135 of file qgsprojectionselector.cpp.

References AUTHID_COLUMN, NAME_COLUMN, and QGIS_CRS_ID_COLUMN.

void QgsProjectionSelector::searchBoxHasFocus ( bool ) [signal]

Let listeners know if find has focus so they can adjust the default button.

QString QgsProjectionSelector::selectedAuthId ( )

Gets the current authority-style projection identifier.

Definition at line 449 of file qgsprojectionselector.cpp.

References getSelectedExpression(), and USER_CRS_START_ID.

long QgsProjectionSelector::selectedCrsId ( ) [slot]

Gets the current QGIS projection identfier.

Definition at line 459 of file qgsprojectionselector.cpp.

References QGIS_CRS_ID_COLUMN.

Referenced by on_lstCoordinateSystems_currentItemChanged(), and ~QgsProjectionSelector().

QString QgsProjectionSelector::selectedName ( ) [slot]

Definition at line 296 of file qgsprojectionselector.cpp.

References NAME_COLUMN.

Referenced by on_lstCoordinateSystems_currentItemChanged().

long QgsProjectionSelector::selectedPostgresSrId ( ) [slot]

Gets the current PostGIS-style projection identifier.

Definition at line 443 of file qgsprojectionselector.cpp.

References getSelectedExpression().

QString QgsProjectionSelector::selectedProj4String ( ) [slot]

Definition at line 304 of file qgsprojectionselector.cpp.

References mSrsDatabaseFileName, QGIS_CRS_ID_COLUMN, QgsApplication::qgisUserDbFilePath(), QgsDebugMsg, showDBMissingWarning(), and USER_CRS_START_ID.

Referenced by on_lstCoordinateSystems_currentItemChanged().

void QgsProjectionSelector::setOgcWmsCrsFilter ( QSet< QString > crsFilter ) [slot]

filters this widget by the given CRSs

Sets this widget to filter the available projections to those listed by the given Coordinate Reference Systems.

Parameters:

crsFilter a list of OGC Coordinate Reference Systems to filter the list of projections by. This is useful in (e.g.) WMS situations where you just want to offer what the WMS server can support.

Warning:: This function's behaviour is undefined if it is called after the widget is shown.

Definition at line 470 of file qgsprojectionselector.cpp.

References mCrsFilter, mProjListDone, and mUserProjListDone.

void QgsProjectionSelector::setSelectedAuthId ( QString authId ) [slot]

Definition at line 235 of file qgsprojectionselector.cpp.

References applySelection(), and AUTHID_COLUMN.

void QgsProjectionSelector::setSelectedCrsId ( long theCRSID ) [slot]

Definition at line 230 of file qgsprojectionselector.cpp.

References applySelection(), and QGIS_CRS_ID_COLUMN.

void QgsProjectionSelector::setSelectedCrsName ( QString theCRSName ) [slot]

Definition at line 225 of file qgsprojectionselector.cpp.

References applySelection(), and NAME_COLUMN.

void QgsProjectionSelector::showDBMissingWarning ( const QString theFileName ) [private]

Show the user a warning if the srs database could not be found.

Definition at line 987 of file qgsprojectionselector.cpp.

References tr.

Referenced by getLargestCRSIDMatch(), getSelectedExpression(), loadCrsList(), loadUserCrsList(), and selectedProj4String().

void QgsProjectionSelector::showEvent ( QShowEvent * theEvent ) [protected]

Used to ensure the projection list view is actually populated.

Definition at line 146 of file qgsprojectionselector.cpp.

References applySelection(), insertRecent(), loadCrsList(), loadUserCrsList(), mCrsFilter, mRecentProjections, and mRecentProjListDone.

const QString QgsProjectionSelector::sqlSafeString ( const QString theSQL )

Make the string safe for use in SQL statements. This involves escaping single quotes, double quotes, backslashes, and optionally, percentage symbols. Percentage symbols are used as wildcards sometimes and so when using the string as part of the LIKE phrase of a select statement, should be escaped.

const QString in The input string to make safe.
Returns:
The string made safe for SQL statements.
linfinity qtcreator qgis
const QString in The input string to make safe.
Returns:
The string made safe for SQL statements.

Definition at line 977 of file qgsprojectionselector.cpp.

void QgsProjectionSelector::sridSelected ( QString theSRID ) [signal]

Referenced by on_lstCoordinateSystems_currentItemChanged().