QStandardItem* QgsLegendModel::itemFromSymbol( QgsSymbol* s, int opacity, const QString& layerID )
{
QgsComposerSymbolItem* currentSymbolItem = 0;
//label
QString itemText;
QString label;
QString lowerValue = s->lowerValue();
QString upperValue = s->upperValue();
label = s->label();
//Take the label as item text if it is there
if ( !label.isEmpty() )
{
itemText = label;
}
//take single value
else if ( lowerValue == upperValue || upperValue.isEmpty() )
{
itemText = lowerValue;
}
else //or value range
{
itemText = lowerValue + " - " + upperValue;
}
//icon item
QImage symbolImage;
switch ( s->type() )
{
case QGis::Point:
symbolImage = s->getPointSymbolAsImage();
break;
case QGis::Line:
symbolImage = s->getLineSymbolAsImage();
break;
case QGis::Polygon:
symbolImage = s->getPolygonSymbolAsImage();
break;
default:
return 0;
}
if ( opacity != 255 )
{
//todo: manipulate image pixel by pixel...
QRgb oldColor;
for ( int i = 0; i < symbolImage.height(); ++i )
{
QRgb* scanLineBuffer = ( QRgb* ) symbolImage.scanLine( i );
for ( int j = 0; j < symbolImage.width(); ++j )
{
oldColor = symbolImage.pixel( j, i );
scanLineBuffer[j] = qRgba( qRed( oldColor ), qGreen( oldColor ), qBlue( oldColor ), opacity );
}
}
}
currentSymbolItem = new QgsComposerSymbolItem( itemText );
if ( mHasTopLevelWindow )//only use QIcon / QPixmap if we have a running x-server
{
currentSymbolItem->setIcon( QIcon( QPixmap::fromImage( symbolImage ) ) );
}
if ( !currentSymbolItem )
{
return 0;
}
//Pass deep copy of QgsSymbol as user data. Cast to void* necessary such that QMetaType handles it
QgsSymbol* symbolCopy = new QgsSymbol( *s );
currentSymbolItem->setSymbol( symbolCopy );
currentSymbolItem->setFlags( Qt::ItemIsEnabled | Qt::ItemIsSelectable );
currentSymbolItem ->setLayerID( layerID );
return currentSymbolItem;
}
QStandardItem* QgsComposerSymbolItem::clone() const
{
QgsComposerSymbolItem* cloneItem = new QgsComposerSymbolItem();
*cloneItem = *this;
if ( mSymbol )
{
cloneItem->setSymbol( new QgsSymbol( *mSymbol ) );
}
return cloneItem;
}
void QgsComposerLegend::drawLayerChildItems( QPainter* p, QStandardItem* layerItem, double& currentYCoord, double& maxXCoord, int layerOpacity )
{
if ( !layerItem )
{
return;
}
//Draw all symbols first and the texts after (to find out the x coordinate to have the text aligned)
QList<double> childYCoords;
QList<double> realItemHeights;
double textHeight = fontHeightCharacterMM( mItemFont, QChar( '0' ) );
double itemHeight = qMax( mSymbolHeight, textHeight );
double textAlignCoord = 0; //alignment for legend text
QStandardItem* currentItem;
int numChildren = layerItem->rowCount();
for ( int i = 0; i < numChildren; ++i )
{
//real symbol height. Can be different from standard height in case of point symbols
double realSymbolHeight;
double realItemHeight = itemHeight; //will be adjusted if realSymbolHeight turns out to be larger
currentYCoord += mSymbolSpace;
double currentXCoord = mBoxSpace;
currentItem = layerItem->child( i, 0 );
if ( !currentItem )
{
continue;
}
QgsSymbol* symbol = 0;
QgsComposerSymbolItem* symbolItem = dynamic_cast<QgsComposerSymbolItem*>( currentItem );
if ( symbolItem )
{
symbol = symbolItem->symbol();
}
QgsSymbolV2* symbolNg = 0;
QgsComposerSymbolV2Item* symbolV2Item = dynamic_cast<QgsComposerSymbolV2Item*>( currentItem );
if ( symbolV2Item )
{
symbolNg = symbolV2Item->symbolV2();
}
QgsComposerRasterSymbolItem* rasterItem = dynamic_cast<QgsComposerRasterSymbolItem*>( currentItem );
if ( symbol ) //item with symbol?
{
//draw symbol
drawSymbol( p, symbol, currentYCoord + ( itemHeight - mSymbolHeight ) / 2, currentXCoord, realSymbolHeight, layerOpacity );
realItemHeight = qMax( realSymbolHeight, itemHeight );
currentXCoord += mIconLabelSpace;
}
else if ( symbolNg ) //item with symbol NG?
{
drawSymbolV2( p, symbolNg, currentYCoord + ( itemHeight - mSymbolHeight ) / 2, currentXCoord, realSymbolHeight, layerOpacity );
realItemHeight = qMax( realSymbolHeight, itemHeight );
currentXCoord += mIconLabelSpace;
}
else if ( rasterItem )
{
if ( p )
{
p->setBrush( rasterItem->color() );
p->drawRect( QRectF( currentXCoord, currentYCoord + ( itemHeight - mSymbolHeight ) / 2, mSymbolWidth, mSymbolHeight ) );
}
currentXCoord += mSymbolWidth;
currentXCoord += mIconLabelSpace;
}
else //item with icon?
{
QIcon symbolIcon = currentItem->icon();
if ( !symbolIcon.isNull() && p )
{
symbolIcon.paint( p, currentXCoord, currentYCoord + ( itemHeight - mSymbolHeight ) / 2, mSymbolWidth, mSymbolHeight );
currentXCoord += mSymbolWidth;
currentXCoord += mIconLabelSpace;
}
}
childYCoords.push_back( currentYCoord );
realItemHeights.push_back( realItemHeight );
currentYCoord += realItemHeight;
textAlignCoord = qMax( currentXCoord, textAlignCoord );
}
maxXCoord = qMax( maxXCoord, textAlignCoord );
for ( int i = 0; i < numChildren; ++i )
{
if ( p )
{
p->setPen( QColor( 0, 0, 0 ) );
drawText( p, textAlignCoord, childYCoords.at( i ) + textHeight + ( realItemHeights.at( i ) - textHeight ) / 2, layerItem->child( i, 0 )->text(), mItemFont );
maxXCoord = qMax( maxXCoord, textAlignCoord + mBoxSpace + textWidthMillimeters( mItemFont, layerItem->child( i, 0 )->text() ) );
}
}
}