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qgsgrassregion.cpp
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qgsgrassregion.cpp
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/***************************************************************************
qgsgrassregion.h - Edit region
-------------------
begin : August, 2004
copyright : (C) 2004 by Radim Blazek
email : blazek@itc.it
***************************************************************************/
/***************************************************************************
* *
* 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 "qgis.h"
#include "qgsgrassregion.h"
#include "qgsgrassplugin.h"
#include "qgsgrass.h"
#include "qgisinterface.h"
#include "qgslogger.h"
#include "qgsmapcanvas.h"
#include "qgsmaprenderer.h"
#include "qgsmaptool.h"
#include <QButtonGroup>
#include <QColorDialog>
#include <QMessageBox>
#include <QMouseEvent>
#include <QRubberBand>
#include <QSettings>
/** Map tool which uses rubber band for changing grass region */
QgsGrassRegionEdit::QgsGrassRegionEdit( QgsMapCanvas* canvas )
: QgsMapTool( canvas )
{
QgsDebugMsg( "entered" );
mDraw = false;
mRubberBand = new QgsRubberBand( mCanvas, QGis::Polygon );
mSrcRubberBand = new QgsRubberBand( mCanvas, QGis::Polygon );
QString error;
mCrs = QgsGrass::crs( QgsGrass::getDefaultGisdbase(), QgsGrass::getDefaultLocation(), error );
QgsDebugMsg( "mCrs: " + mCrs.toWkt() );
setTransform();
connect( canvas, SIGNAL( destinationCrsChanged() ), this, SLOT( setTransform() ) );
}
QgsGrassRegionEdit::~QgsGrassRegionEdit()
{
delete mRubberBand;
delete mSrcRubberBand;
}
//! mouse pressed in map canvas
void QgsGrassRegionEdit::canvasPressEvent( QgsMapMouseEvent * event )
{
QgsDebugMsg( "entered." );
mDraw = true;
mRubberBand->reset( QGis::Polygon );
mSrcRubberBand->reset( QGis::Polygon );
emit captureStarted();
mStartPoint = toMapCoordinates( event->pos() );
mEndPoint = mStartPoint;
setRegion( mStartPoint, mEndPoint );
}
//! mouse movement in map canvas
void QgsGrassRegionEdit::canvasMoveEvent( QgsMapMouseEvent * event )
{
if ( !mDraw )
return;
mEndPoint = toMapCoordinates( event->pos() );
setRegion( mStartPoint, mEndPoint );
}
//! mouse button released
void QgsGrassRegionEdit::canvasReleaseEvent( QgsMapMouseEvent * event )
{
if ( !mDraw )
return;
mEndPoint = toMapCoordinates( event->pos() );
setRegion( mStartPoint, mEndPoint );
mDraw = false;
emit captureEnded();
}
//! called when map tool is about to get inactive
void QgsGrassRegionEdit::deactivate()
{
mRubberBand->reset( QGis::Polygon );
mSrcRubberBand->reset( QGis::Polygon );
QgsMapTool::deactivate();
}
void QgsGrassRegionEdit::setRegion( const QgsPoint& ul, const QgsPoint& lr )
{
mStartPoint = ul;
mEndPoint = lr;
calcSrcRegion();
drawRegion( canvas(), mRubberBand, mSrcRectangle, &mCoordinateTransform, true );
drawRegion( canvas(), mSrcRubberBand, QgsRectangle( mStartPoint, mEndPoint ), 0, true );
}
void QgsGrassRegionEdit::calcSrcRegion()
{
mSrcRectangle.set( mStartPoint, mEndPoint );
if ( mCanvas->hasCrsTransformEnabled() && mCrs.isValid() && mCanvas->mapSettings().destinationCrs().isValid() )
{
QgsCoordinateTransform coordinateTransform;
coordinateTransform.setSourceCrs( mCanvas->mapSettings().destinationCrs() );
coordinateTransform.setDestCRS( mCrs );
mSrcRectangle = coordinateTransform.transformBoundingBox( mSrcRectangle );
}
}
void QgsGrassRegionEdit::setTransform()
{
if ( mCrs.isValid() && canvas()->mapSettings().destinationCrs().isValid() )
{
mCoordinateTransform.setSourceCrs( mCrs );
mCoordinateTransform.setDestCRS( canvas()->mapSettings().destinationCrs() );
}
}
void QgsGrassRegionEdit::transform( QgsMapCanvas *canvas, QVector<QgsPoint> &points, QgsCoordinateTransform *coordinateTransform, QgsCoordinateTransform::TransformDirection direction )
{
/** Coordinate transform */
if ( canvas->hasCrsTransformEnabled() )
{
//QgsDebugMsg ( "srcCrs = " + coordinateTransform->sourceCrs().toWkt() );
//QgsDebugMsg ( "destCrs = " + coordinateTransform->destCRS().toWkt() );
try
{
for ( int i = 0; i < points.size(); i++ )
{
points[i] = coordinateTransform->transform( points[i], direction );
}
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
QgsDebugMsg( QString( "transformation failed: %1" ).arg( cse.what() ) );
}
}
}
void QgsGrassRegionEdit::drawRegion( QgsMapCanvas *canvas, QgsRubberBand* rubberBand, const QgsRectangle &rect, QgsCoordinateTransform * coordinateTransform, bool isPolygon )
{
QVector<QgsPoint> points;
points.append( QgsPoint( rect.xMinimum(), rect.yMinimum() ) );
points.append( QgsPoint( rect.xMaximum(), rect.yMinimum() ) );
points.append( QgsPoint( rect.xMaximum(), rect.yMaximum() ) );
points.append( QgsPoint( rect.xMinimum(), rect.yMaximum() ) );
if ( !isPolygon )
{
points.append( QgsPoint( rect.xMinimum(), rect.yMinimum() ) );
}
if ( coordinateTransform )
{
transform( canvas, points, coordinateTransform );
}
rubberBand->reset( isPolygon ? QGis::Polygon : QGis::Line );
for ( int i = 0; i < points.size(); i++ )
{
bool update = false; // true to update canvas
if ( i == points.size() - 1 )
update = true;
rubberBand->addPoint( points[i], update );
}
rubberBand->show();
}
QgsRectangle QgsGrassRegionEdit::getRegion()
{
//return QgsRectangle( mStartPoint, mEndPoint );
return mSrcRectangle;
}
void QgsGrassRegionEdit::setSrcRegion( const QgsRectangle &rect )
{
mSrcRectangle = rect;
}
QgsGrassRegion::QgsGrassRegion( QgisInterface *iface,
QWidget * parent, Qt::WindowFlags f )
: QWidget( parent, f )
, QgsGrassRegionBase()
, mInterface( 0 )
, mCanvas( 0 )
, mRadioGroup( 0 )
, mX( 0 )
, mY( 0 )
, mUpdatingGui( false )
, mRegionEdit( 0 )
{
QgsDebugMsg( "QgsGrassRegion()" );
setupUi( this );
setAttribute( Qt::WA_DeleteOnClose );
connect( mButtonBox, SIGNAL( clicked( QAbstractButton * ) ), SLOT( buttonClicked( QAbstractButton * ) ) );
//mPlugin = plugin;
mInterface = iface;
mCanvas = mInterface->mapCanvas();
mUpdatingGui = false;
// Set input validators
QDoubleValidator *dv = new QDoubleValidator( 0 );
QIntValidator *iv = new QIntValidator( 0 );
mNorth->setValidator( dv );
mSouth->setValidator( dv );
mEast->setValidator( dv );
mWest->setValidator( dv );
mNSRes->setValidator( dv );
mEWRes->setValidator( dv );
mRows->setValidator( iv );
mCols->setValidator( iv );
// Group radio buttons
mRadioGroup = new QButtonGroup();
mRadioGroup->addButton( mResRadio );
mRadioGroup->addButton( mRowsColsRadio );
mResRadio->setChecked( true );
radioChanged();
connect( mRadioGroup, SIGNAL( buttonClicked( int ) ), this, SLOT( radioChanged() ) );
// Connect entries
connect( mNorth, SIGNAL( editingFinished() ), this, SLOT( northChanged() ) );
connect( mSouth, SIGNAL( editingFinished() ), this, SLOT( southChanged() ) );
connect( mEast, SIGNAL( editingFinished() ), this, SLOT( eastChanged() ) );
connect( mWest, SIGNAL( editingFinished() ), this, SLOT( westChanged() ) );
connect( mNSRes, SIGNAL( editingFinished() ), this, SLOT( NSResChanged() ) );
connect( mEWRes, SIGNAL( editingFinished() ), this, SLOT( EWResChanged() ) );
connect( mRows, SIGNAL( editingFinished() ), this, SLOT( rowsChanged() ) );
connect( mCols, SIGNAL( editingFinished() ), this, SLOT( colsChanged() ) );
connect( QgsGrass::instance(), SIGNAL( regionChanged() ), SLOT( reloadRegion() ) );
connect( mCanvas, SIGNAL( mapToolSet( QgsMapTool * ) ), SLOT( canvasMapToolSet( QgsMapTool * ) ) );
}
QgsGrassRegion::~QgsGrassRegion()
{
delete mRegionEdit;
}
QString QgsGrassRegion::formatExtent( double v )
{
// format with precision approximately to meters
// max length of degree of latitude on pole is 111694 m
return qgsDoubleToString( v, mCrs.mapUnits() == QGis::Degrees ? 6 : 1 );
}
QString QgsGrassRegion::formatResolution( double v )
{
return qgsDoubleToString( v, mCrs.mapUnits() == QGis::Degrees ? 10 : 4 );
}
void QgsGrassRegion::readRegion()
{
// Read current region
try
{
QgsGrass::region( &mWindow );
}
catch ( QgsGrass::Exception &e )
{
QgsGrass::warning( e );
return;
}
}
void QgsGrassRegion::refreshGui()
{
if ( mUpdatingGui )
{
return;
}
mUpdatingGui = true;
QgsDebugMsg( "entered." );
mNorth->setText( formatExtent( mWindow.north ) );
mSouth->setText( formatExtent( mWindow.south ) );
mEast->setText( formatExtent( mWindow.east ) );
mWest->setText( formatExtent( mWindow.west ) );
mNSRes->setText( formatResolution( mWindow.ns_res ) );
mEWRes->setText( formatResolution( mWindow.ew_res ) );
mRows->setText( QString::number( mWindow.rows ) );
mCols->setText( QString::number( mWindow.cols ) );
displayRegion();
mUpdatingGui = false;
}
void QgsGrassRegion::reloadRegion()
{
readRegion();
refreshGui();
}
void QgsGrassRegion::mapsetChanged()
{
delete mRegionEdit;
mRegionEdit = 0;
if ( QgsGrass::activeMode() )
{
mRegionEdit = new QgsGrassRegionEdit( mCanvas );
connect( mRegionEdit, SIGNAL( captureEnded() ), this, SLOT( onCaptureFinished() ) );
QString error;
mCrs = QgsGrass::crs( QgsGrass::getDefaultGisdbase(), QgsGrass::getDefaultLocation(), error );
reloadRegion();
}
}
void QgsGrassRegion::northChanged()
{
if ( mUpdatingGui )
return;
mWindow.north = mNorth->text().toDouble();
if ( mWindow.north < mWindow.south )
mWindow.north = mWindow.south;
adjust();
refreshGui();
}
void QgsGrassRegion::southChanged()
{
if ( mUpdatingGui )
return;
mWindow.south = mSouth->text().toDouble();
if ( mWindow.south > mWindow.north )
mWindow.south = mWindow.north;
adjust();
refreshGui();
}
void QgsGrassRegion::eastChanged()
{
if ( mUpdatingGui )
return;
mWindow.east = mEast->text().toDouble();
if ( mWindow.east < mWindow.west )
mWindow.east = mWindow.west;
adjust();
refreshGui();
}
void QgsGrassRegion::westChanged()
{
if ( mUpdatingGui )
return;
mWindow.west = mWest->text().toDouble();
if ( mWindow.west > mWindow.east )
mWindow.west = mWindow.east;
adjust();
refreshGui();
}
void QgsGrassRegion::NSResChanged()
{
if ( mUpdatingGui )
return;
mWindow.ns_res = mNSRes->text().toDouble();
if ( mWindow.ns_res <= 0 )
mWindow.ns_res = 1;
adjust();
refreshGui();
}
void QgsGrassRegion::EWResChanged()
{
if ( mUpdatingGui )
return;
mWindow.ew_res = mEWRes->text().toDouble();
if ( mWindow.ew_res <= 0 )
mWindow.ew_res = 1;
adjust();
refreshGui();
}
void QgsGrassRegion::rowsChanged()
{
if ( mUpdatingGui )
return;
mWindow.rows = mRows->text().toInt();
if ( mWindow.rows < 1 )
mWindow.rows = 1;
adjust();
refreshGui();
}
void QgsGrassRegion::colsChanged()
{
if ( mUpdatingGui )
return;
mWindow.cols = mCols->text().toInt();
if ( mWindow.cols < 1 )
mWindow.cols = 1;
adjust();
refreshGui();
}
void QgsGrassRegion::adjust()
{
int rc = 0;
if ( mRowsColsRadio->isChecked() )
{
rc = 1;
}
G_adjust_Cell_head( &mWindow, rc, rc );
}
void QgsGrassRegion::radioChanged()
{
QgsDebugMsg( "entered." );
bool res = !mRowsColsRadio->isChecked();
mEWResLabel->setEnabled( res );
mEWRes->setEnabled( res );
mNSResLabel->setEnabled( res );
mNSRes->setEnabled( res );
mColsLabel->setEnabled( !res );
mCols->setEnabled( !res );
mRowsLabel->setEnabled( !res );
mRows->setEnabled( !res );
}
void QgsGrassRegion::onCaptureFinished()
{
QgsDebugMsg( "entered." );
if ( !mRegionEdit )
{
return;
}
QgsRectangle rect = mRegionEdit->getRegion();
mWindow.west = rect.xMinimum();
mWindow.east = rect.xMaximum();
mWindow.south = rect.yMinimum();
mWindow.north = rect.yMaximum();
adjust();
refreshGui();
}
void QgsGrassRegion::canvasMapToolSet( QgsMapTool *tool )
{
QgsDebugMsg( "entered" );
mDrawButton->setChecked( tool == mRegionEdit );
}
void QgsGrassRegion::displayRegion()
{
if ( !mRegionEdit )
{
return;
}
QgsPoint ul( mWindow.west, mWindow.north );
QgsPoint lr( mWindow.east, mWindow.south );
mRegionEdit->setSrcRegion( QgsRectangle( ul, lr ) );
}
void QgsGrassRegion::on_mDrawButton_clicked()
{
QgsDebugMsg( "entered" );
mCanvas->setMapTool( mRegionEdit );
}
void QgsGrassRegion::buttonClicked( QAbstractButton *button )
{
if ( mButtonBox->buttonRole( button ) == QDialogButtonBox::ApplyRole )
{
try
{
QgsGrass::instance()->writeRegion( &mWindow );
}
catch ( QgsGrass::Exception &e )
{
QgsGrass::warning( e );
return;
}
}
else if ( mButtonBox->buttonRole( button ) == QDialogButtonBox::ResetRole )
{
reloadRegion();
}
// Better to keep the tool selected until another tool is chosen?
mCanvas->unsetMapTool( mRegionEdit );
}