/
qgscomposermap.cpp
2660 lines (2322 loc) · 85.3 KB
/
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 "qgscomposition.h"
#include "qgscoordinatetransform.h"
#include "qgslogger.h"
#include "qgsmaprenderer.h"
#include "qgsmaprendererjob.h"
#include "qgsmaplayerregistry.h"
#include "qgsmaptopixel.h"
#include "qgsproject.h"
#include "qgsrasterlayer.h"
#include "qgsrendercontext.h"
#include "qgsscalecalculator.h"
#include "qgsvectorlayer.h"
#include "qgspallabeling.h"
#include "qgsexpression.h"
#include "qgslabel.h"
#include "qgslabelattributes.h"
#include "qgssymbollayerv2utils.h" //for pointOnLineWithDistance
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QPainter>
#include <QSettings>
#include <cmath>
QgsComposerMap::QgsComposerMap( QgsComposition *composition, int x, int y, int width, int height )
: QgsComposerItem( x, y, width, height, composition ), mMapRotation( 0 ), mKeepLayerSet( false )
, mOverviewFrameMapId( -1 ), mOverviewBlendMode( QPainter::CompositionMode_SourceOver ), mOverviewInverted( false ), mOverviewCentered( false )
, mUpdatesEnabled( true ), mGridEnabled( false ), mGridStyle( Solid )
, mGridIntervalX( 0.0 ), mGridIntervalY( 0.0 ), mGridOffsetX( 0.0 ), mGridOffsetY( 0.0 ), mGridAnnotationFontColor( QColor( 0, 0, 0 ) )
, mGridAnnotationPrecision( 3 ), mShowGridAnnotation( false ), mGridBlendMode( QPainter::CompositionMode_SourceOver )
, mLeftGridAnnotationPosition( OutsideMapFrame ), mRightGridAnnotationPosition( OutsideMapFrame )
, mTopGridAnnotationPosition( OutsideMapFrame ), mBottomGridAnnotationPosition( OutsideMapFrame ), mAnnotationFrameDistance( 1.0 )
, mLeftGridAnnotationDirection( Horizontal ), mRightGridAnnotationDirection( Horizontal ), mTopGridAnnotationDirection( Horizontal )
, mBottomGridAnnotationDirection( Horizontal ), mGridFrameStyle( NoGridFrame ), mGridFrameWidth( 2.0 )
, mGridFramePenThickness( 0.5 ), mGridFramePenColor( QColor( 0, 0, 0 ) ), mGridFrameFillColor1( Qt::white ), mGridFrameFillColor2( Qt::black )
, mCrossLength( 3 ), mMapCanvas( 0 ), mDrawCanvasItems( true ), mAtlasDriven( false ), mAtlasScalingMode( Auto ), mAtlasMargin( 0.10 )
{
mComposition = composition;
mOverviewFrameMapSymbol = 0;
mGridLineSymbol = 0;
createDefaultOverviewFrameSymbol();
createDefaultGridLineSymbol();
mId = 0;
assignFreeId();
mPreviewMode = QgsComposerMap::Rectangle;
mCurrentRectangle = rect();
// Cache
mCacheUpdated = false;
mDrawing = false;
//Offset
mXOffset = 0.0;
mYOffset = 0.0;
//get default composer font from settings
QSettings settings;
QString defaultFontString = settings.value( "/Composer/defaultFont" ).toString();
if ( !defaultFontString.isEmpty() )
{
mGridAnnotationFont.setFamily( defaultFontString );
}
//get the color for map canvas background and set map background color accordingly
int bgRedInt = QgsProject::instance()->readNumEntry( "Gui", "/CanvasColorRedPart", 255 );
int bgGreenInt = QgsProject::instance()->readNumEntry( "Gui", "/CanvasColorGreenPart", 255 );
int bgBlueInt = QgsProject::instance()->readNumEntry( "Gui", "/CanvasColorBluePart", 255 );
setBackgroundColor( QColor( bgRedInt, bgGreenInt, bgBlueInt ) );
connectUpdateSlot();
//calculate mExtent based on width/height ratio and map canvas extent
mExtent = mComposition->mapSettings().visibleExtent();
setSceneRect( QRectF( x, y, width, height ) );
setToolTip( tr( "Map %1" ).arg( mId ) );
initGridAnnotationFormatFromProject();
}
QgsComposerMap::QgsComposerMap( QgsComposition *composition )
: QgsComposerItem( 0, 0, 10, 10, composition ), mMapRotation( 0 ), mKeepLayerSet( false ), mOverviewFrameMapId( -1 )
, mOverviewBlendMode( QPainter::CompositionMode_SourceOver ), mOverviewInverted( false ), mOverviewCentered( false )
, mUpdatesEnabled( true ), mGridEnabled( false ), mGridStyle( Solid )
, mGridIntervalX( 0.0 ), mGridIntervalY( 0.0 ), mGridOffsetX( 0.0 ), mGridOffsetY( 0.0 ), mGridAnnotationFontColor( QColor( 0, 0, 0 ) )
, mGridAnnotationPrecision( 3 ), mShowGridAnnotation( false ), mGridBlendMode( QPainter::CompositionMode_SourceOver )
, mLeftGridAnnotationPosition( OutsideMapFrame ), mRightGridAnnotationPosition( OutsideMapFrame )
, mTopGridAnnotationPosition( OutsideMapFrame ), mBottomGridAnnotationPosition( OutsideMapFrame ), mAnnotationFrameDistance( 1.0 )
, mLeftGridAnnotationDirection( Horizontal ), mRightGridAnnotationDirection( Horizontal ), mTopGridAnnotationDirection( Horizontal )
, mBottomGridAnnotationDirection( Horizontal ), mGridFrameStyle( NoGridFrame ), mGridFrameWidth( 2.0 ), mGridFramePenThickness( 0.5 )
, mGridFramePenColor( QColor( 0, 0, 0 ) ), mGridFrameFillColor1( Qt::white ), mGridFrameFillColor2( Qt::black )
, mCrossLength( 3 ), mMapCanvas( 0 ), mDrawCanvasItems( true ), mAtlasDriven( false ), mAtlasScalingMode( Auto ), mAtlasMargin( 0.10 )
{
mOverviewFrameMapSymbol = 0;
mGridLineSymbol = 0;
createDefaultOverviewFrameSymbol();
//Offset
mXOffset = 0.0;
mYOffset = 0.0;
connectUpdateSlot();
mComposition = composition;
mId = mComposition->composerMapItems().size();
mPreviewMode = QgsComposerMap::Rectangle;
mCurrentRectangle = rect();
setToolTip( tr( "Map %1" ).arg( mId ) );
initGridAnnotationFormatFromProject();
}
void QgsComposerMap::adjustExtentToItemShape( double itemWidth, double itemHeight, QgsRectangle& extent ) const
{
double itemWidthHeightRatio = itemWidth / itemHeight;
double newWidthHeightRatio = extent.width() / extent.height();
if ( itemWidthHeightRatio <= newWidthHeightRatio )
{
//enlarge height of new extent, ensuring the map center stays the same
double newHeight = extent.width() / itemWidthHeightRatio;
double deltaHeight = newHeight - extent.height();
extent.setYMinimum( extent.yMinimum() - deltaHeight / 2 );
extent.setYMaximum( extent.yMaximum() + deltaHeight / 2 );
}
else
{
//enlarge width of new extent, ensuring the map center stays the same
double newWidth = itemWidthHeightRatio * extent.height();
double deltaWidth = newWidth - extent.width();
extent.setXMinimum( extent.xMinimum() - deltaWidth / 2 );
extent.setXMaximum( extent.xMaximum() + deltaWidth / 2 );
}
}
QgsComposerMap::~QgsComposerMap()
{
delete mOverviewFrameMapSymbol;
delete mGridLineSymbol;
}
/* 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 QSizeF& size, double dpi, double* forceWidthScale )
{
Q_UNUSED( forceWidthScale );
if ( !painter )
{
return;
}
const QgsMapSettings& ms = mComposition->mapSettings();
QgsMapSettings jobMapSettings;
jobMapSettings.setExtent( extent );
jobMapSettings.setOutputSize( size.toSize() );
jobMapSettings.setOutputDpi( dpi );
jobMapSettings.setMapUnits( ms.mapUnits() );
jobMapSettings.setBackgroundColor( Qt::transparent );
//set layers to render
QStringList theLayerSet = layersToRender();
if ( -1 != mCurrentExportLayer )
{
//exporting with separate layers (eg, to svg layers), so we only want to render a single map layer
const int layerIdx = mCurrentExportLayer - ( hasBackground() ? 1 : 0 );
theLayerSet =
( layerIdx >= 0 && layerIdx < theLayerSet.length() )
? QStringList( theLayerSet[ theLayerSet.length() - layerIdx - 1 ] )
: QStringList(); //exporting decorations such as map frame/grid/overview, so no map layers required
}
jobMapSettings.setLayers( theLayerSet );
jobMapSettings.setDestinationCrs( ms.destinationCrs() );
jobMapSettings.setCrsTransformEnabled( ms.hasCrsTransformEnabled() );
jobMapSettings.setFlags( ms.flags() );
/* TODO[MD] fix after merge
if ( mComposition->plotStyle() == QgsComposition::Print ||
mComposition->plotStyle() == QgsComposition::Postscript )
{
//if outputing composer, disable optimisations like layer simplification
theRendererContext->setUseRenderingOptimization( false );
}*/
//update $map variable. Use QgsComposerItem's id since that is user-definable
QgsExpression::setSpecialColumn( "$map", QgsComposerItem::id() );
// composer-specific overrides of flags
jobMapSettings.setFlag( QgsMapSettings::ForceVectorOutput ); // force vector output (no caching of marker images etc.)
jobMapSettings.setFlag( QgsMapSettings::DrawEditingInfo, false );
jobMapSettings.setFlag( QgsMapSettings::UseAdvancedEffects, mComposition->useAdvancedEffects() ); // respect the composition's useAdvancedEffects flag
// render
QgsMapRendererCustomPainterJob job( jobMapSettings, painter );
job.start();
job.waitForFinished();
}
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 )
{
//make sure scale factor is positive
horizontalVScaleFactor = mLastValidViewScaleFactor > 0 ? mLastValidViewScaleFactor : 1;
}
double widthMM = requestExtent.width() * mapUnitsToMM();
double heightMM = requestExtent.height() * mapUnitsToMM();
int w = widthMM * horizontalVScaleFactor;
int h = heightMM * 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 );
// set DPI of the image
mCacheImage.setDotsPerMeterX( 1000 * w / widthMM );
mCacheImage.setDotsPerMeterY( 1000 * h / heightMM );
if ( hasBackground() )
{
//Initially fill image with specified background color. This ensures that layers with blend modes will
//preview correctly
mCacheImage.fill( backgroundColor().rgba() );
}
else
{
//no background, but start with empty fill to avoid artifacts
mCacheImage.fill( QColor( 255, 255, 255, 0 ).rgba() );
}
QPainter p( &mCacheImage );
draw( &p, requestExtent, QSizeF( w, h ), mCacheImage.logicalDpiX() );
p.end();
mCacheUpdated = true;
mDrawing = false;
}
void QgsComposerMap::paint( QPainter* painter, const QStyleOptionGraphicsItem* itemStyle, QWidget* pWidget )
{
Q_UNUSED( pWidget );
if ( !mComposition || !painter )
{
return;
}
QRectF thisPaintRect = QRectF( 0, 0, QGraphicsRectItem::rect().width(), QGraphicsRectItem::rect().height() );
painter->save();
painter->setClipRect( thisPaintRect );
if ( mComposition->plotStyle() == QgsComposition::Preview && mPreviewMode == Rectangle )
{
// Fill with background color
drawBackground( painter );
QFont messageFont( "", 12 );
painter->setFont( messageFont );
painter->setPen( QColor( 0, 0, 0, 125 ) );
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
//Background color is already included in cached image, so no need to draw
QgsRectangle requestRectangle;
requestedExtent( requestRectangle );
QgsRectangle cExtent = *currentMapExtent();
double imagePixelWidth = cExtent.width() / requestRectangle.width() * mCacheImage.width() ; //how many pixels of the image are for the map extent?
double scale = rect().width() / imagePixelWidth;
QgsPoint rotationPoint = QgsPoint(( cExtent.xMaximum() + cExtent.xMinimum() ) / 2.0, ( cExtent.yMaximum() + cExtent.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() - cExtent.xMinimum() ) * mapUnitsToMM();
double yTopLeftShift = ( cExtent.yMaximum() - rotationPoint.y() ) * mapUnitsToMM();
painter->save();
painter->translate( mXOffset, mYOffset );
painter->translate( xTopLeftShift, yTopLeftShift );
painter->rotate( mMapRotation );
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;
}
// Fill with background color
if ( shouldDrawPart( Background ) )
{
drawBackground( painter );
}
QgsRectangle requestRectangle;
requestedExtent( requestRectangle );
QgsRectangle cExtent = *currentMapExtent();
QSizeF theSize( requestRectangle.width() * mapUnitsToMM(), requestRectangle.height() * mapUnitsToMM() );
QgsPoint rotationPoint = QgsPoint(( cExtent.xMaximum() + cExtent.xMinimum() ) / 2.0, ( cExtent.yMaximum() + cExtent.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() - cExtent.xMinimum() ) * mapUnitsToMM();
double yTopLeftShift = ( cExtent.yMaximum() - rotationPoint.y() ) * mapUnitsToMM();
painter->save();
painter->translate( mXOffset, mYOffset );
painter->translate( xTopLeftShift, yTopLeftShift );
painter->rotate( mMapRotation );
painter->translate( xShiftMM, -yShiftMM );
double dotsPerMM = thePaintDevice->logicalDpiX() / 25.4;
theSize *= dotsPerMM; // output size will be in dots (pixels)
painter->scale( 1 / dotsPerMM, 1 / dotsPerMM ); // scale painter from mm to dots
draw( painter, requestRectangle, theSize, thePaintDevice->logicalDpiX() );
//restore rotation
painter->restore();
//draw canvas items
drawCanvasItems( painter, itemStyle );
mDrawing = false;
}
painter->setClipRect( thisPaintRect , Qt::NoClip );
if ( mGridEnabled && shouldDrawPart( Grid ) )
{
drawGrid( painter );
}
if ( mOverviewFrameMapId != -1 && shouldDrawPart( OverviewMapExtent ) )
{
drawOverviewMapExtent( painter );
}
if ( shouldDrawPart( Frame ) )
{
drawFrame( painter );
}
if ( isSelected() && shouldDrawPart( SelectionBoxes ) )
{
drawSelectionBoxes( painter );
}
painter->restore();
}
int QgsComposerMap::numberExportLayers() const
{
return
( hasBackground() ? 1 : 0 )
+ layersToRender().length()
+ ( mGridEnabled ? 1 : 0 )
+ ( mOverviewFrameMapId != -1 ? 1 : 0 )
+ ( hasFrame() ? 1 : 0 )
+ ( isSelected() ? 1 : 0 )
;
}
bool QgsComposerMap::shouldDrawPart( PartType part ) const
{
if ( -1 == mCurrentExportLayer )
{
//all parts of the composer map are visible
return true;
}
int idx = numberExportLayers();
if ( isSelected() )
{
--idx;
if ( SelectionBoxes == part )
{
return mCurrentExportLayer == idx;
}
}
if ( hasFrame() )
{
--idx;
if ( Frame == part )
{
return mCurrentExportLayer == idx;
}
}
if ( mOverviewFrameMapId )
{
--idx;
if ( OverviewMapExtent == part )
{
return mCurrentExportLayer == idx;
}
}
if ( mGridEnabled )
{
--idx;
if ( Grid == part )
{
return mCurrentExportLayer == idx;
}
}
if ( hasBackground() )
{
if ( Background == part )
{
return mCurrentExportLayer == 0;
}
}
return true; // for Layer
}
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;
}
const QgsMapRenderer *QgsComposerMap::mapRenderer() const
{
Q_NOWARN_DEPRECATED_PUSH
return mComposition->mapRenderer();
Q_NOWARN_DEPRECATED_POP
}
QStringList QgsComposerMap::layersToRender() const
{
//use stored layer set or read current set from main canvas
QStringList renderLayerSet;
if ( mKeepLayerSet )
{
renderLayerSet = mLayerSet;
}
else
{
renderLayerSet = mComposition->mapSettings().layers();
}
//remove atlas coverage layer if required
//TODO - move setting for hiding coverage layer to map item properties
if ( mComposition->atlasMode() != QgsComposition::AtlasOff )
{
if ( mComposition->atlasComposition().hideCoverage() )
{
//hiding coverage layer
int removeAt = renderLayerSet.indexOf( mComposition->atlasComposition().coverageLayer()->id() );
if ( removeAt != -1 )
{
renderLayerSet.removeAt( removeAt );
}
}
}
return renderLayerSet;
}
double QgsComposerMap::scale() const
{
QgsScaleCalculator calculator;
calculator.setMapUnits( mComposition->mapSettings().mapUnits() );
calculator.setDpi( 25.4 ); //QGraphicsView units are mm
return calculator.calculate( *currentMapExtent(), rect().width() );
}
void QgsComposerMap::resize( double dx, double dy )
{
//setRect
QRectF currentRect = rect();
QRectF newSceneRect = QRectF( pos().x(), pos().y(), currentRect.width() + dx, currentRect.height() + dy );
setSceneRect( newSceneRect );
updateItem();
}
void QgsComposerMap::moveContent( double dx, double dy )
{
if ( !mDrawing )
{
transformShift( dx, dy );
currentMapExtent()->setXMinimum( currentMapExtent()->xMinimum() + dx );
currentMapExtent()->setXMaximum( currentMapExtent()->xMaximum() + dx );
currentMapExtent()->setYMinimum( currentMapExtent()->yMinimum() + dy );
currentMapExtent()->setYMaximum( currentMapExtent()->yMaximum() + dy );
cache();
update();
emit itemChanged();
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", 2 ).toInt();
if ( zoomMode == 3 ) //do nothing
{
return;
}
double zoomFactor = settings.value( "/qgis/zoom_factor", 2.0 ).toDouble();
//find out new center point
double centerX = ( currentMapExtent()->xMaximum() + currentMapExtent()->xMinimum() ) / 2;
double centerY = ( currentMapExtent()->yMaximum() + currentMapExtent()->yMinimum() ) / 2;
if ( zoomMode != 0 )
{
//find out map coordinates of mouse position
double mapMouseX = currentMapExtent()->xMinimum() + ( x / rect().width() ) * ( currentMapExtent()->xMaximum() - currentMapExtent()->xMinimum() );
double mapMouseY = currentMapExtent()->yMinimum() + ( 1 - ( y / rect().height() ) ) * ( currentMapExtent()->yMaximum() - currentMapExtent()->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 = ( currentMapExtent()->xMaximum() - currentMapExtent()->xMinimum() ) / zoomFactor;
newIntervalY = ( currentMapExtent()->yMaximum() - currentMapExtent()->yMinimum() ) / zoomFactor;
}
else if ( delta < 0 )
{
newIntervalX = ( currentMapExtent()->xMaximum() - currentMapExtent()->xMinimum() ) * zoomFactor;
newIntervalY = ( currentMapExtent()->yMaximum() - currentMapExtent()->yMinimum() ) * zoomFactor;
}
else //no need to zoom
{
return;
}
currentMapExtent()->setXMaximum( centerX + newIntervalX / 2 );
currentMapExtent()->setXMinimum( centerX - newIntervalX / 2 );
currentMapExtent()->setYMaximum( centerY + newIntervalY / 2 );
currentMapExtent()->setYMinimum( centerY - newIntervalY / 2 );
cache();
update();
emit itemChanged();
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;
updateBoundingRect();
update();
emit itemChanged();
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( pos().x(), pos().y(), currentRect.width(), newHeight ) );
updateItem();
}
void QgsComposerMap::setNewAtlasFeatureExtent( const QgsRectangle& extent )
{
if ( mAtlasFeatureExtent == extent )
{
return;
}
//don't adjust size of item, instead adjust size of bounds to fit
QgsRectangle newExtent = extent;
//Make sure the width/height ratio is the same as the map item size
double currentWidthHeightRatio = rect().width() / rect().height();
double newWidthHeightRatio = newExtent.width() / newExtent.height();
if ( currentWidthHeightRatio < newWidthHeightRatio )
{
//enlarge height of new extent, ensuring the map center stays the same
double newHeight = newExtent.width() / currentWidthHeightRatio;
double deltaHeight = newHeight - newExtent.height();
newExtent.setYMinimum( extent.yMinimum() - deltaHeight / 2 );
newExtent.setYMaximum( extent.yMaximum() + deltaHeight / 2 );
}
else if ( currentWidthHeightRatio >= newWidthHeightRatio )
{
//enlarge width of new extent, ensuring the map center stays the same
double newWidth = currentWidthHeightRatio * newExtent.height();
double deltaWidth = newWidth - newExtent.width();
newExtent.setXMinimum( extent.xMinimum() - deltaWidth / 2 );
newExtent.setXMaximum( extent.xMaximum() + deltaWidth / 2 );
}
mAtlasFeatureExtent = newExtent;
mCacheUpdated = false;
emit preparedForAtlas();
updateItem();
emit itemChanged();
emit extentChanged();
}
void QgsComposerMap::toggleAtlasPreview()
{
//atlas preview has been toggled, so update item and extents
mCacheUpdated = false;
updateItem();
emit itemChanged();
emit extentChanged();
}
QgsRectangle* QgsComposerMap::currentMapExtent()
{
//non-const version
if ( mAtlasDriven && mComposition->atlasMode() != QgsComposition::AtlasOff )
{
//if atlas is enabled, and we are either exporting the composition or previewing the atlas, then
//return the current temporary atlas feature extent
return &mAtlasFeatureExtent;
}
else
{
//otherwise return permenant user set extent
return &mExtent;
}
}
const QgsRectangle* QgsComposerMap::currentMapExtent() const
{
//const version
if ( mAtlasDriven && mComposition->atlasMode() != QgsComposition::AtlasOff )
{
//if atlas is enabled, and we are either exporting the composition or previewing the atlas, then
//return the current temporary atlas feature extent
return &mAtlasFeatureExtent;
}
else
{
//otherwise return permenant user set extent
return &mExtent;
}
}
void QgsComposerMap::setNewScale( double scaleDenominator )
{
double currentScaleDenominator = scale();
if ( scaleDenominator == currentScaleDenominator )
{
return;
}
double scaleRatio = scaleDenominator / currentScaleDenominator;
currentMapExtent()->scale( scaleRatio );
mCacheUpdated = false;
cache();
update();
emit itemChanged();
emit extentChanged();
}
void QgsComposerMap::setPreviewMode( PreviewMode m )
{
mPreviewMode = m;
emit itemChanged();
}
void QgsComposerMap::setOffset( double xOffset, double yOffset )
{
mXOffset = xOffset;
mYOffset = yOffset;
}
void QgsComposerMap::setRotation( double r )
{
//kept for api compatibility with QGIS 2.0
setMapRotation( r );
}
void QgsComposerMap::setMapRotation( double r )
{
mMapRotation = r;
emit mapRotationChanged( r );
emit itemChanged();
update();
}
void QgsComposerMap::updateItem()
{
if ( !mUpdatesEnabled )
{
return;
}
if ( mPreviewMode != QgsComposerMap::Rectangle && !mCacheUpdated )
{
cache();
}
QgsComposerItem::updateItem();
}
bool QgsComposerMap::containsWMSLayer() const
{
QStringList layers = mComposition->mapSettings().layers();
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;
}
bool QgsComposerMap::containsAdvancedEffects() const
{
// check if map contains advanced effects like blend modes, or flattened layers for transparency
QStringList layers = mComposition->mapSettings().layers();
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 )
{
if ( currentLayer->blendMode() != QPainter::CompositionMode_SourceOver )
{
return true;
}
// if vector layer, check labels and feature blend mode
QgsVectorLayer* currentVectorLayer = qobject_cast<QgsVectorLayer *>( currentLayer );
if ( currentVectorLayer )
{
if ( currentVectorLayer->layerTransparency() != 0 )
{
return true;
}
if ( currentVectorLayer->featureBlendMode() != QPainter::CompositionMode_SourceOver )
{
return true;
}
// check label blend modes
if ( QgsPalLabeling::staticWillUseLayer( currentVectorLayer ) )
{
// Check all label blending properties
QgsPalLayerSettings layerSettings = QgsPalLayerSettings::fromLayer( currentVectorLayer );
if (( layerSettings.blendMode != QPainter::CompositionMode_SourceOver ) ||
( layerSettings.bufferSize != 0 && layerSettings.bufferBlendMode != QPainter::CompositionMode_SourceOver ) ||
( layerSettings.shadowDraw && layerSettings.shadowBlendMode != QPainter::CompositionMode_SourceOver ) ||
( layerSettings.shapeDraw && layerSettings.shapeBlendMode != QPainter::CompositionMode_SourceOver ) )
{
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" );
}
if ( mDrawCanvasItems )
{
composerMapElem.setAttribute( "drawCanvasItems", "true" );
}
else
{
composerMapElem.setAttribute( "drawCanvasItems", "false" );
}
//overview map frame
QDomElement overviewFrameElem = doc.createElement( "overviewFrame" );
overviewFrameElem.setAttribute( "overviewFrameMap", mOverviewFrameMapId );
overviewFrameElem.setAttribute( "overviewBlendMode", QgsMapRenderer::getBlendModeEnum( mOverviewBlendMode ) );
if ( mOverviewInverted )
{
overviewFrameElem.setAttribute( "overviewInverted", "true" );
}
else
{
overviewFrameElem.setAttribute( "overviewInverted", "false" );
}
overviewFrameElem.setAttribute( "overviewCentered", mOverviewCentered ? "true" : "false" );
QDomElement overviewFrameStyleElem = QgsSymbolLayerV2Utils::saveSymbol( QString(), mOverviewFrameMapSymbol, doc );
overviewFrameElem.appendChild( overviewFrameStyleElem );
composerMapElem.appendChild( overviewFrameElem );
//extent
QDomElement extentElem = doc.createElement( "Extent" );
extentElem.setAttribute( "xmin", qgsDoubleToString( mExtent.xMinimum() ) );
extentElem.setAttribute( "xmax", qgsDoubleToString( mExtent.xMaximum() ) );
extentElem.setAttribute( "ymin", qgsDoubleToString( mExtent.yMinimum() ) );
extentElem.setAttribute( "ymax", qgsDoubleToString( mExtent.yMaximum() ) );
composerMapElem.appendChild( extentElem );
//map rotation
composerMapElem.setAttribute( "mapRotation", QString::number( mMapRotation ) );
//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 );