/
qgscomposermap.cpp
1484 lines (1269 loc) · 44.6 KB
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qgscomposermap.cpp
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/***************************************************************************
qgscomposermap.cpp
-------------------
begin : January 2005
copyright : (C) 2005 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 "qgscomposermap.h"
#include "qgscoordinatetransform.h"
#include "qgslogger.h"
#include "qgsmaprenderer.h"
#include "qgsmaplayer.h"
#include "qgsmaplayerregistry.h"
#include "qgsmaptopixel.h"
#include "qgsproject.h"
#include "qgsmaprenderer.h"
#include "qgsrasterlayer.h"
#include "qgsrendercontext.h"
#include "qgsscalecalculator.h"
#include "qgsvectorlayer.h"
#include "qgslabel.h"
#include "qgslabelattributes.h"
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QPainter>
#include <QSettings>
#include <iostream>
#include <cmath>
QgsComposerMap::QgsComposerMap( QgsComposition *composition, int x, int y, int width, int height )
: QgsComposerItem( x, y, width, height, composition ), mKeepLayerSet( false ), mGridEnabled( false ), mGridStyle( Solid ), \
mGridIntervalX( 0.0 ), mGridIntervalY( 0.0 ), mGridOffsetX( 0.0 ), mGridOffsetY( 0.0 ), mGridAnnotationPrecision( 3 ), mShowGridAnnotation( false ), \
mGridAnnotationPosition( OutsideMapFrame ), mAnnotationFrameDistance( 1.0 ), mGridAnnotationDirection( Horizontal ), mCrossLength( 3 ), mMapCanvas( 0 )
{
mComposition = composition;
mId = mComposition->composerMapItems().size();
mMapRenderer = mComposition->mapRenderer();
mPreviewMode = QgsComposerMap::Rectangle;
mCurrentRectangle = rect();
// Cache
mCacheUpdated = false;
mDrawing = false;
//Offset
mXOffset = 0.0;
mYOffset = 0.0;
connectUpdateSlot();
//calculate mExtent based on width/height ratio and map canvas extent
if ( mMapRenderer )
{
mExtent = mMapRenderer->extent();
}
setSceneRect( QRectF( x, y, width, height ) );
setToolTip( tr( "Map %1" ).arg( mId ) );
mGridPen.setCapStyle( Qt::FlatCap );
}
QgsComposerMap::QgsComposerMap( QgsComposition *composition )
: QgsComposerItem( 0, 0, 10, 10, composition ), mKeepLayerSet( false ), mGridEnabled( false ), mGridStyle( Solid ), \
mGridIntervalX( 0.0 ), mGridIntervalY( 0.0 ), mGridOffsetX( 0.0 ), mGridOffsetY( 0.0 ), mGridAnnotationPrecision( 3 ), mShowGridAnnotation( false ), \
mGridAnnotationPosition( OutsideMapFrame ), mAnnotationFrameDistance( 1.0 ), mGridAnnotationDirection( Horizontal ), mCrossLength( 3 ), mMapCanvas( 0 )
{
//Offset
mXOffset = 0.0;
mYOffset = 0.0;
connectUpdateSlot();
mComposition = composition;
mMapRenderer = mComposition->mapRenderer();
mId = mComposition->composerMapItems().size();
mPreviewMode = QgsComposerMap::Rectangle;
mCurrentRectangle = rect();
setToolTip( tr( "Map %1" ).arg( mId ) );
mGridPen.setCapStyle( Qt::FlatCap );
}
QgsComposerMap::~QgsComposerMap()
{
}
/* This function is called by paint() and cache() to render the map. It does not override any functions
from QGraphicsItem. */
void QgsComposerMap::draw( QPainter *painter, const QgsRectangle& extent, const QSize& size, int dpi )
{
if ( !painter )
{
return;
}
if ( !mMapRenderer )
{
return;
}
QgsMapRenderer theMapRenderer;
theMapRenderer.setExtent( extent );
theMapRenderer.setOutputSize( size, dpi );
if ( mMapRenderer->labelingEngine() )
theMapRenderer.setLabelingEngine( mMapRenderer->labelingEngine()->clone() );
//use stored layer set or read current set from main canvas
if ( mKeepLayerSet )
{
theMapRenderer.setLayerSet( mLayerSet );
}
else
{
theMapRenderer.setLayerSet( mMapRenderer->layerSet() );
}
theMapRenderer.setProjectionsEnabled( mMapRenderer->hasCrsTransformEnabled() );
theMapRenderer.setDestinationSrs( mMapRenderer->destinationSrs() );
//set antialiasing if enabled in options
QSettings settings;
if ( settings.value( "/qgis/enable_anti_aliasing", false ).toBool() )
{
painter->setRenderHint( QPainter::Antialiasing );
}
QgsRenderContext* theRendererContext = theMapRenderer.rendererContext();
if ( theRendererContext )
{
theRendererContext->setDrawEditingInformation( false );
theRendererContext->setRenderingStopped( false );
}
//force composer map scale for scale dependent visibility
double bk_scale = theMapRenderer.scale();
theMapRenderer.setScale( scale() );
//layer caching (as QImages) cannot be done for composer prints
QSettings s;
bool bkLayerCaching = s.value( "/qgis/enable_render_caching", false ).toBool();
s.setValue( "/qgis/enable_render_caching", false );
theMapRenderer.render( painter );
s.setValue( "/qgis/enable_render_caching", bkLayerCaching );
theMapRenderer.setScale( bk_scale );
}
void QgsComposerMap::cache( void )
{
if ( mPreviewMode == Rectangle )
{
return;
}
if ( mDrawing )
{
return;
}
mDrawing = true;
//in case of rotation, we need to request a larger rectangle and create a larger cache image
QgsRectangle requestExtent;
requestedExtent( requestExtent );
double horizontalVScaleFactor = horizontalViewScaleFactor();
if ( horizontalVScaleFactor < 0 )
{
horizontalVScaleFactor = mLastValidViewScaleFactor;
}
int w = requestExtent.width() * mapUnitsToMM() * horizontalVScaleFactor;
int h = requestExtent.height() * mapUnitsToMM() * horizontalVScaleFactor;
if ( w > 5000 ) //limit size of image for better performance
{
w = 5000;
}
if ( h > 5000 )
{
h = 5000;
}
mCacheImage = QImage( w, h, QImage::Format_ARGB32 );
mCacheImage.fill( brush().color().rgb() ); //consider the item background brush
double mapUnitsPerPixel = mExtent.width() / w;
// WARNING: ymax in QgsMapToPixel is device height!!!
QgsMapToPixel transform( mapUnitsPerPixel, h, requestExtent.yMinimum(), requestExtent.xMinimum() );
QPainter p( &mCacheImage );
draw( &p, requestExtent, QSize( w, h ), mCacheImage.logicalDpiX() );
p.end();
mCacheUpdated = true;
mDrawing = false;
}
void QgsComposerMap::paint( QPainter* painter, const QStyleOptionGraphicsItem* itemStyle, QWidget* pWidget )
{
if ( !mComposition || !painter )
{
return;
}
QRectF thisPaintRect = QRectF( 0, 0, QGraphicsRectItem::rect().width(), QGraphicsRectItem::rect().height() );
painter->save();
painter->setClipRect( thisPaintRect );
drawBackground( painter );
if ( mComposition->plotStyle() == QgsComposition::Preview && mPreviewMode == Rectangle )
{
QFont messageFont( "", 12 );
painter->setFont( messageFont );
painter->setPen( QColor( 0, 0, 0 ) );
painter->drawText( thisPaintRect, tr( "Map will be printed here" ) );
}
else if ( mComposition->plotStyle() == QgsComposition::Preview )
{
//draw cached pixmap. This function does not call cache() any more because
//Qt 4.4.0 and 4.4.1 have problems with recursive paintings
//QgsComposerMap::cache() and QgsComposerMap::update() need to be called by
//client functions
QgsRectangle requestRectangle;
requestedExtent( requestRectangle );
double horizontalVScaleFactor = horizontalViewScaleFactor();
if ( horizontalVScaleFactor < 0 )
{
horizontalVScaleFactor = mLastValidViewScaleFactor;
}
double imagePixelWidth = mExtent.width() / requestRectangle.width() * mCacheImage.width() ; //how many pixels of the image are for the map extent?
double scale = rect().width() / imagePixelWidth;
QgsPoint rotationPoint = QgsPoint(( mExtent.xMaximum() + mExtent.xMinimum() ) / 2.0, ( mExtent.yMaximum() + mExtent.yMinimum() ) / 2.0 );
//shift such that rotation point is at 0/0 point in the coordinate system
double yShiftMM = ( requestRectangle.yMaximum() - rotationPoint.y() ) * mapUnitsToMM();
double xShiftMM = ( requestRectangle.xMinimum() - rotationPoint.x() ) * mapUnitsToMM();
//shift such that top left point of the extent at point 0/0 in item coordinate system
double xTopLeftShift = ( rotationPoint.x() - mExtent.xMinimum() ) * mapUnitsToMM();
double yTopLeftShift = ( mExtent.yMaximum() - rotationPoint.y() ) * mapUnitsToMM();
painter->save();
painter->translate( mXOffset, mYOffset );
painter->translate( xTopLeftShift, yTopLeftShift );
painter->rotate( mRotation );
painter->translate( xShiftMM, -yShiftMM );
painter->scale( scale, scale );
painter->drawImage( 0, 0, mCacheImage );
//restore rotation
painter->restore();
//draw canvas items
//drawCanvasItems( painter, itemStyle );
}
else if ( mComposition->plotStyle() == QgsComposition::Print ||
mComposition->plotStyle() == QgsComposition::Postscript )
{
if ( mDrawing )
{
return;
}
mDrawing = true;
QPaintDevice* thePaintDevice = painter->device();
if ( !thePaintDevice )
{
return;
}
QgsRectangle requestRectangle;
requestedExtent( requestRectangle );
QSize theSize( requestRectangle.width() * mapUnitsToMM(), requestRectangle.height() * mapUnitsToMM() );
QgsPoint rotationPoint = QgsPoint(( mExtent.xMaximum() + mExtent.xMinimum() ) / 2.0, ( mExtent.yMaximum() + mExtent.yMinimum() ) / 2.0 );
//shift such that rotation point is at 0/0 point in the coordinate system
double yShiftMM = ( requestRectangle.yMaximum() - rotationPoint.y() ) * mapUnitsToMM();
double xShiftMM = ( requestRectangle.xMinimum() - rotationPoint.x() ) * mapUnitsToMM();
//shift such that top left point of the extent at point 0/0 in item coordinate system
double xTopLeftShift = ( rotationPoint.x() - mExtent.xMinimum() ) * mapUnitsToMM();
double yTopLeftShift = ( mExtent.yMaximum() - rotationPoint.y() ) * mapUnitsToMM();
painter->save();
painter->translate( mXOffset, mYOffset );
painter->translate( xTopLeftShift, yTopLeftShift );
painter->rotate( mRotation );
painter->translate( xShiftMM, -yShiftMM );
draw( painter, requestRectangle, theSize, 25.4 ); //scene coordinates seem to be in mm
//restore rotation
painter->restore();
//draw canvas items
//drawCanvasItems( painter, itemStyle );
mDrawing = false;
}
painter->setClipRect( thisPaintRect , Qt::NoClip );
if ( mGridEnabled )
{
drawGrid( painter );
}
drawFrame( painter );
if ( isSelected() )
{
drawSelectionBoxes( painter );
}
painter->restore();
}
void QgsComposerMap::updateCachedImage( void )
{
syncLayerSet(); //layer list may have changed
mCacheUpdated = false;
cache();
QGraphicsRectItem::update();
}
void QgsComposerMap::renderModeUpdateCachedImage()
{
if ( mPreviewMode == Render )
{
updateCachedImage();
}
}
void QgsComposerMap::setCacheUpdated( bool u )
{
mCacheUpdated = u;
}
double QgsComposerMap::scale() const
{
QgsScaleCalculator calculator;
calculator.setMapUnits( mMapRenderer->mapUnits() );
calculator.setDpi( 25.4 ); //QGraphicsView units are mm
return calculator.calculate( mExtent, rect().width() );
}
void QgsComposerMap::resize( double dx, double dy )
{
//setRect
QRectF currentRect = rect();
QRectF newSceneRect = QRectF( transform().dx(), transform().dy(), currentRect.width() + dx, currentRect.height() + dy );
setSceneRect( newSceneRect );
}
void QgsComposerMap::moveContent( double dx, double dy )
{
if ( !mDrawing )
{
transformShift( dx, dy );
mExtent.setXMinimum( mExtent.xMinimum() + dx );
mExtent.setXMaximum( mExtent.xMaximum() + dx );
mExtent.setYMinimum( mExtent.yMinimum() + dy );
mExtent.setYMaximum( mExtent.yMaximum() + dy );
cache();
update();
emit extentChanged();
}
}
void QgsComposerMap::zoomContent( int delta, double x, double y )
{
if ( mDrawing )
{
return;
}
QSettings settings;
//read zoom mode
//0: zoom, 1: zoom and recenter, 2: zoom to cursor, 3: nothing
int zoomMode = settings.value( "/qgis/wheel_action", 0 ).toInt();
if ( zoomMode == 3 ) //do nothing
{
return;
}
double zoomFactor = settings.value( "/qgis/zoom_factor", 2.0 ).toDouble();
//find out new center point
double centerX = ( mExtent.xMaximum() + mExtent.xMinimum() ) / 2;
double centerY = ( mExtent.yMaximum() + mExtent.yMinimum() ) / 2;
if ( zoomMode != 0 )
{
//find out map coordinates of mouse position
double mapMouseX = mExtent.xMinimum() + ( x / rect().width() ) * ( mExtent.xMaximum() - mExtent.xMinimum() );
double mapMouseY = mExtent.yMinimum() + ( 1 - ( y / rect().height() ) ) * ( mExtent.yMaximum() - mExtent.yMinimum() );
if ( zoomMode == 1 ) //zoom and recenter
{
centerX = mapMouseX;
centerY = mapMouseY;
}
else if ( zoomMode == 2 ) //zoom to cursor
{
centerX = mapMouseX + ( centerX - mapMouseX ) * ( 1.0 / zoomFactor );
centerY = mapMouseY + ( centerY - mapMouseY ) * ( 1.0 / zoomFactor );
}
}
double newIntervalX, newIntervalY;
if ( delta > 0 )
{
newIntervalX = ( mExtent.xMaximum() - mExtent.xMinimum() ) / zoomFactor;
newIntervalY = ( mExtent.yMaximum() - mExtent.yMinimum() ) / zoomFactor;
}
else if ( delta < 0 )
{
newIntervalX = ( mExtent.xMaximum() - mExtent.xMinimum() ) * zoomFactor;
newIntervalY = ( mExtent.yMaximum() - mExtent.yMinimum() ) * zoomFactor;
}
else //no need to zoom
{
return;
}
mExtent.setXMaximum( centerX + newIntervalX / 2 );
mExtent.setXMinimum( centerX - newIntervalX / 2 );
mExtent.setYMaximum( centerY + newIntervalY / 2 );
mExtent.setYMinimum( centerY - newIntervalY / 2 );
cache();
update();
emit extentChanged();
}
void QgsComposerMap::setSceneRect( const QRectF& rectangle )
{
double w = rectangle.width();
double h = rectangle.height();
//prepareGeometryChange();
QgsComposerItem::setSceneRect( rectangle );
//QGraphicsRectItem::update();
double newHeight = mExtent.width() * h / w ;
mExtent = QgsRectangle( mExtent.xMinimum(), mExtent.yMinimum(), mExtent.xMaximum(), mExtent.yMinimum() + newHeight );
mCacheUpdated = false;
if ( mPreviewMode != Rectangle )
{
cache();
}
updateBoundingRect();
update();
emit extentChanged();
}
void QgsComposerMap::setNewExtent( const QgsRectangle& extent )
{
if ( mExtent == extent )
{
return;
}
mExtent = extent;
//adjust height
QRectF currentRect = rect();
double newHeight = currentRect.width() * extent.height() / extent.width();
setSceneRect( QRectF( transform().dx(), transform().dy(), currentRect.width(), newHeight ) );
}
void QgsComposerMap::setNewScale( double scaleDenominator )
{
double currentScaleDenominator = scale();
if ( scaleDenominator == currentScaleDenominator )
{
return;
}
double scaleRatio = scaleDenominator / currentScaleDenominator;
mExtent.scale( scaleRatio );
mCacheUpdated = false;
cache();
update();
emit extentChanged();
}
void QgsComposerMap::setOffset( double xOffset, double yOffset )
{
mXOffset = xOffset;
mYOffset = yOffset;
}
void QgsComposerMap::setMapRotation( double r )
{
setRotation( r );
emit rotationChanged( r );
}
bool QgsComposerMap::containsWMSLayer() const
{
if ( !mMapRenderer )
{
return false;
}
QStringList layers = mMapRenderer->layerSet();
QStringList::const_iterator layer_it = layers.constBegin();
QgsMapLayer* currentLayer = 0;
for ( ; layer_it != layers.constEnd(); ++layer_it )
{
currentLayer = QgsMapLayerRegistry::instance()->mapLayer( *layer_it );
if ( currentLayer )
{
QgsRasterLayer* currentRasterLayer = qobject_cast<QgsRasterLayer *>( currentLayer );
if ( currentRasterLayer )
{
const QgsRasterDataProvider* rasterProvider = 0;
if (( rasterProvider = currentRasterLayer->dataProvider() ) )
{
if ( rasterProvider->name() == "wms" )
{
return true;
}
}
}
}
}
return false;
}
void QgsComposerMap::connectUpdateSlot()
{
//connect signal from layer registry to update in case of new or deleted layers
QgsMapLayerRegistry* layerRegistry = QgsMapLayerRegistry::instance();
if ( layerRegistry )
{
connect( layerRegistry, SIGNAL( layerWillBeRemoved( QString ) ), this, SLOT( updateCachedImage() ) );
connect( layerRegistry, SIGNAL( layerWasAdded( QgsMapLayer* ) ), this, SLOT( updateCachedImage() ) );
}
}
bool QgsComposerMap::writeXML( QDomElement& elem, QDomDocument & doc ) const
{
if ( elem.isNull() )
{
return false;
}
QDomElement composerMapElem = doc.createElement( "ComposerMap" );
composerMapElem.setAttribute( "id", mId );
//previewMode
if ( mPreviewMode == Cache )
{
composerMapElem.setAttribute( "previewMode", "Cache" );
}
else if ( mPreviewMode == Render )
{
composerMapElem.setAttribute( "previewMode", "Render" );
}
else //rectangle
{
composerMapElem.setAttribute( "previewMode", "Rectangle" );
}
if ( mKeepLayerSet )
{
composerMapElem.setAttribute( "keepLayerSet", "true" );
}
else
{
composerMapElem.setAttribute( "keepLayerSet", "false" );
}
//extent
QDomElement extentElem = doc.createElement( "Extent" );
extentElem.setAttribute( "xmin", QString::number( mExtent.xMinimum() ) );
extentElem.setAttribute( "xmax", QString::number( mExtent.xMaximum() ) );
extentElem.setAttribute( "ymin", QString::number( mExtent.yMinimum() ) );
extentElem.setAttribute( "ymax", QString::number( mExtent.yMaximum() ) );
composerMapElem.appendChild( extentElem );
//layer set
QDomElement layerSetElem = doc.createElement( "LayerSet" );
QStringList::const_iterator layerIt = mLayerSet.constBegin();
for ( ; layerIt != mLayerSet.constEnd(); ++layerIt )
{
QDomElement layerElem = doc.createElement( "Layer" );
QDomText layerIdText = doc.createTextNode( *layerIt );
layerElem.appendChild( layerIdText );
layerSetElem.appendChild( layerElem );
}
composerMapElem.appendChild( layerSetElem );
//grid
QDomElement gridElem = doc.createElement( "Grid" );
gridElem.setAttribute( "show", mGridEnabled );
gridElem.setAttribute( "gridStyle", mGridStyle );
gridElem.setAttribute( "intervalX", mGridIntervalX );
gridElem.setAttribute( "intervalY", mGridIntervalY );
gridElem.setAttribute( "offsetX", mGridOffsetX );
gridElem.setAttribute( "offsetY", mGridOffsetY );
gridElem.setAttribute( "penWidth", mGridPen.widthF() );
gridElem.setAttribute( "penColorRed", mGridPen.color().red() );
gridElem.setAttribute( "penColorGreen", mGridPen.color().green() );
gridElem.setAttribute( "penColorBlue", mGridPen.color().blue() );
gridElem.setAttribute( "crossLength", mCrossLength );
//grid annotation
QDomElement annotationElem = doc.createElement( "Annotation" );
annotationElem.setAttribute( "show", mShowGridAnnotation );
annotationElem.setAttribute( "position", mGridAnnotationPosition );
annotationElem.setAttribute( "frameDistance", mAnnotationFrameDistance );
annotationElem.setAttribute( "direction", mGridAnnotationDirection );
annotationElem.setAttribute( "font", mGridAnnotationFont.toString() );
annotationElem.setAttribute( "precision", mGridAnnotationPrecision );
gridElem.appendChild( annotationElem );
composerMapElem.appendChild( gridElem );
elem.appendChild( composerMapElem );
return _writeXML( composerMapElem, doc );
}
bool QgsComposerMap::readXML( const QDomElement& itemElem, const QDomDocument& doc )
{
if ( itemElem.isNull() )
{
return false;
}
QString idRead = itemElem.attribute( "id", "not found" );
if ( idRead != "not found" )
{
mId = idRead.toInt();
}
mPreviewMode = Rectangle;
//previewMode
QString previewMode = itemElem.attribute( "previewMode" );
if ( previewMode == "Cache" )
{
mPreviewMode = Cache;
}
else if ( previewMode == "Render" )
{
mPreviewMode = Render;
}
else
{
mPreviewMode = Rectangle;
}
//extent
QDomNodeList extentNodeList = itemElem.elementsByTagName( "Extent" );
if ( extentNodeList.size() > 0 )
{
QDomElement extentElem = extentNodeList.at( 0 ).toElement();
double xmin, xmax, ymin, ymax;
xmin = extentElem.attribute( "xmin" ).toDouble();
xmax = extentElem.attribute( "xmax" ).toDouble();
ymin = extentElem.attribute( "ymin" ).toDouble();
ymax = extentElem.attribute( "ymax" ).toDouble();
mExtent = QgsRectangle( xmin, ymin, xmax, ymax );
}
//mKeepLayerSet flag
QString keepLayerSetFlag = itemElem.attribute( "keepLayerSet" );
if ( keepLayerSetFlag.compare( "true", Qt::CaseInsensitive ) == 0 )
{
mKeepLayerSet = true;
}
else
{
mKeepLayerSet = false;
}
//mLayerSet
QDomNodeList layerSetNodeList = itemElem.elementsByTagName( "LayerSet" );
QStringList layerSet;
if ( layerSetNodeList.size() > 0 )
{
QDomElement layerSetElem = layerSetNodeList.at( 0 ).toElement();
QDomNodeList layerIdNodeList = layerSetElem.elementsByTagName( "Layer" );
for ( int i = 0; i < layerIdNodeList.size(); ++i )
{
layerSet << layerIdNodeList.at( i ).toElement().text();
}
}
mLayerSet = layerSet;
mDrawing = false;
mNumCachedLayers = 0;
mCacheUpdated = false;
//grid
QDomNodeList gridNodeList = itemElem.elementsByTagName( "Grid" );
if ( gridNodeList.size() > 0 )
{
QDomElement gridElem = gridNodeList.at( 0 ).toElement();
mGridEnabled = ( gridElem.attribute( "show", "0" ) != "0" );
mGridStyle = QgsComposerMap::GridStyle( gridElem.attribute( "gridStyle", "0" ).toInt() );
mGridIntervalX = gridElem.attribute( "intervalX", "0" ).toDouble();
mGridIntervalY = gridElem.attribute( "intervalY", "0" ).toDouble();
mGridOffsetX = gridElem.attribute( "offsetX", "0" ).toDouble();
mGridOffsetY = gridElem.attribute( "offsetY", "0" ).toDouble();
mGridPen.setWidthF( gridElem.attribute( "penWidth", "0" ).toDouble() );
mGridPen.setColor( QColor( gridElem.attribute( "penColorRed", "0" ).toInt(), \
gridElem.attribute( "penColorGreen", "0" ).toInt(), \
gridElem.attribute( "penColorBlue", "0" ).toInt() ) );
mCrossLength = gridElem.attribute( "crossLength", "3" ).toDouble();
QDomNodeList annotationNodeList = gridElem.elementsByTagName( "Annotation" );
if ( annotationNodeList.size() > 0 )
{
QDomElement annotationElem = annotationNodeList.at( 0 ).toElement();
mShowGridAnnotation = ( annotationElem.attribute( "show", "0" ) != "0" );
mGridAnnotationPosition = QgsComposerMap::GridAnnotationPosition( annotationElem.attribute( "position", "0" ).toInt() );
mAnnotationFrameDistance = annotationElem.attribute( "frameDistance", "0" ).toDouble();
mGridAnnotationDirection = QgsComposerMap::GridAnnotationDirection( annotationElem.attribute( "direction", "0" ).toInt() );
mGridAnnotationFont.fromString( annotationElem.attribute( "font", "" ) );
mGridAnnotationPrecision = annotationElem.attribute( "precision", "3" ).toInt();
}
}
//restore general composer item properties
QDomNodeList composerItemList = itemElem.elementsByTagName( "ComposerItem" );
if ( composerItemList.size() > 0 )
{
QDomElement composerItemElem = composerItemList.at( 0 ).toElement();
_readXML( composerItemElem, doc );
}
updateBoundingRect();
return true;
}
void QgsComposerMap::storeCurrentLayerSet()
{
if ( mMapRenderer )
{
mLayerSet = mMapRenderer->layerSet();
}
}
void QgsComposerMap::syncLayerSet()
{
if ( mLayerSet.size() < 1 && !mMapRenderer )
{
return;
}
QStringList currentLayerSet = mMapRenderer->layerSet();
for ( int i = mLayerSet.size() - 1; i >= 0; --i )
{
if ( !currentLayerSet.contains( mLayerSet.at( i ) ) )
{
mLayerSet.removeAt( i );
}
}
}
void QgsComposerMap::drawGrid( QPainter* p )
{
p->setPen( mGridPen );
QList< QPair< double, QLineF > > verticalLines;
yGridLines( verticalLines );
QList< QPair< double, QLineF > >::const_iterator vIt = verticalLines.constBegin();
QList< QPair< double, QLineF > > horizontalLines;
xGridLines( horizontalLines );
QList< QPair< double, QLineF > >::const_iterator hIt = horizontalLines.constBegin();
QRectF thisPaintRect = QRectF( 0, 0, QGraphicsRectItem::rect().width(), QGraphicsRectItem::rect().height() );
p->setClipRect( thisPaintRect );
//simpler approach: draw vertical lines first, then horizontal ones
if ( mGridStyle == QgsComposerMap::Solid )
{
for ( ; vIt != verticalLines.constEnd(); ++vIt )
{
p->drawLine( vIt->second );
}
for ( ; hIt != horizontalLines.constEnd(); ++hIt )
{
p->drawLine( hIt->second );
}
}
else //cross
{
QPointF intersectionPoint, crossEnd1, crossEnd2;
for ( ; vIt != verticalLines.constEnd(); ++vIt )
{
//start mark
crossEnd1 = pointOnLineWithDistance( vIt->second.p1(), vIt->second.p2(), mCrossLength );
p->drawLine( vIt->second.p1(), crossEnd1 );
//test for intersection with every horizontal line
hIt = horizontalLines.constBegin();
for ( ; hIt != horizontalLines.constEnd(); ++hIt )
{
if ( hIt->second.intersect( vIt->second, &intersectionPoint ) == QLineF::BoundedIntersection )
{
crossEnd1 = pointOnLineWithDistance( intersectionPoint, vIt->second.p1(), mCrossLength );
crossEnd2 = pointOnLineWithDistance( intersectionPoint, vIt->second.p2(), mCrossLength );
p->drawLine( crossEnd1, crossEnd2 );
}
}
//end mark
QPointF crossEnd2 = pointOnLineWithDistance( vIt->second.p2(), vIt->second.p1(), mCrossLength );
p->drawLine( vIt->second.p2(), crossEnd2 );
}
hIt = horizontalLines.constBegin();
for ( ; hIt != horizontalLines.constEnd(); ++hIt )
{
//start mark
crossEnd1 = pointOnLineWithDistance( hIt->second.p1(), hIt->second.p2(), mCrossLength );
p->drawLine( hIt->second.p1(), crossEnd1 );
vIt = verticalLines.constBegin();
for ( ; vIt != verticalLines.constEnd(); ++vIt )
{
if ( vIt->second.intersect( hIt->second, &intersectionPoint ) == QLineF::BoundedIntersection )
{
crossEnd1 = pointOnLineWithDistance( intersectionPoint, hIt->second.p1(), mCrossLength );
crossEnd2 = pointOnLineWithDistance( intersectionPoint, hIt->second.p2(), mCrossLength );
p->drawLine( crossEnd1, crossEnd2 );
}
}
//end mark
crossEnd1 = pointOnLineWithDistance( hIt->second.p2(), hIt->second.p1(), mCrossLength );
p->drawLine( hIt->second.p2(), crossEnd1 );
}
}
p->setClipRect( thisPaintRect , Qt::NoClip );
if ( mShowGridAnnotation )
{
drawCoordinateAnnotations( p, horizontalLines, verticalLines );
}
}
void QgsComposerMap::drawCoordinateAnnotations( QPainter* p, const QList< QPair< double, QLineF > >& hLines, const QList< QPair< double, QLineF > >& vLines )
{
if ( !p )
{
return;
}
QString currentAnnotationString;
QList< QPair< double, QLineF > >::const_iterator it = hLines.constBegin();
for ( ; it != hLines.constEnd(); ++it )
{
currentAnnotationString = QString::number( it->first, 'f', mGridAnnotationPrecision );
drawCoordinateAnnotation( p, it->second.p1(), currentAnnotationString );
drawCoordinateAnnotation( p, it->second.p2(), currentAnnotationString );
}
it = vLines.constBegin();
for ( ; it != vLines.constEnd(); ++it )
{
currentAnnotationString = QString::number( it->first, 'f', mGridAnnotationPrecision );
drawCoordinateAnnotation( p, it->second.p1(), currentAnnotationString );
drawCoordinateAnnotation( p, it->second.p2(), currentAnnotationString );
}
}
void QgsComposerMap::drawCoordinateAnnotation( QPainter* p, const QPointF& pos, QString annotationString )
{
Border frameBorder = borderForLineCoord( pos );
double textWidth = textWidthMillimeters( mGridAnnotationFont, annotationString );
double textHeight = fontAscentMillimeters( mGridAnnotationFont );
double xpos = pos.x();
double ypos = pos.y();
int rotation = 0;
if ( frameBorder == Left )
{
if ( mGridAnnotationPosition == InsideMapFrame )
{
if ( mGridAnnotationDirection == Vertical || mGridAnnotationDirection == BoundaryDirection )
{
xpos += textHeight + mAnnotationFrameDistance;
ypos += textWidth / 2.0;
rotation = 270;
}
else
{
xpos += mAnnotationFrameDistance;
ypos += textHeight / 2.0;
}
}
else //Outside map frame
{
if ( mGridAnnotationDirection == Vertical || mGridAnnotationDirection == BoundaryDirection )
{
xpos -= mAnnotationFrameDistance;
ypos += textWidth / 2.0;
rotation = 270;
}
else
{
xpos -= textWidth + mAnnotationFrameDistance;
ypos += textHeight / 2.0;
}
}
}
else if ( frameBorder == Right )
{
if ( mGridAnnotationPosition == InsideMapFrame )
{
if ( mGridAnnotationDirection == Vertical || mGridAnnotationDirection == BoundaryDirection )
{
xpos -= mAnnotationFrameDistance;
ypos += textWidth / 2.0;
rotation = 270;
}
else //Horizontal
{
xpos -= textWidth + mAnnotationFrameDistance;
ypos += textHeight / 2.0;
}
}
else //OutsideMapFrame
{
if ( mGridAnnotationDirection == Vertical || mGridAnnotationDirection == BoundaryDirection )
{
xpos += textHeight + mAnnotationFrameDistance;
ypos += textWidth / 2.0;
rotation = 270;
}
else //Horizontal
{
xpos += mAnnotationFrameDistance;
ypos += textHeight / 2.0;
}
}
}
else if ( frameBorder == Bottom )
{
if ( mGridAnnotationPosition == InsideMapFrame )
{
if ( mGridAnnotationDirection == Horizontal || mGridAnnotationDirection == BoundaryDirection )
{
ypos -= mAnnotationFrameDistance;
xpos -= textWidth / 2.0;
}
else //Vertical
{
xpos += textHeight / 2.0;
ypos -= mAnnotationFrameDistance;
rotation = 270;
}
}
else //OutsideMapFrame
{
if ( mGridAnnotationDirection == Horizontal || mGridAnnotationDirection == BoundaryDirection )
{
ypos += mAnnotationFrameDistance + textHeight;
xpos -= textWidth / 2.0;
}
else //Vertical
{
xpos += textHeight / 2.0;
ypos += textWidth + mAnnotationFrameDistance;
rotation = 270;
}