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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,244 @@ | ||
| /*************************************************************************** | ||
| qgshighlight.cpp - widget to highlight features on the map | ||
| -------------------------------------- | ||
| Date : 02-03-2011 | ||
| Copyright : (C) 2011 by Juergen E. Fischer, norBIT GmbH | ||
| Email : jef at norbit dot de | ||
| *************************************************************************** | ||
| * * | ||
| * 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. * | ||
| * * | ||
| ***************************************************************************/ | ||
| /* $Id$ */ | ||
|
|
||
| #include "qgshighlight.h" | ||
| #include "qgsgeometry.h" | ||
| #include "qgslogger.h" | ||
| #include "qgsmapcanvas.h" | ||
| #include "qgsmaprenderer.h" | ||
| #include "qgsvectorlayer.h" | ||
| #include <QPainter> | ||
|
|
||
| /*! | ||
| \class QgsHighlight | ||
| \brief The QgsHighlight class provides a transparent overlay widget | ||
| for highlightng features on the map. | ||
| */ | ||
| QgsHighlight::QgsHighlight( QgsMapCanvas* mapCanvas, QgsGeometry *geom, QgsVectorLayer *layer ) | ||
| : QgsMapCanvasItem( mapCanvas ) | ||
| , mLayer( layer ) | ||
| { | ||
| QgsDebugMsg( geom ? "geometry!" : "no geometry" ); | ||
| mGeometry = geom ? new QgsGeometry( *geom ) : 0; | ||
| updateRect(); | ||
| update(); | ||
| setColor( QColor( Qt::lightGray ) ); | ||
| } | ||
|
|
||
| QgsHighlight::~QgsHighlight() | ||
| { | ||
| delete mGeometry; | ||
| } | ||
|
|
||
| /*! | ||
| Set the outline and fill color. | ||
| */ | ||
| void QgsHighlight::setColor( const QColor & color ) | ||
| { | ||
| mPen.setColor( color ); | ||
| QColor fillColor( color.red(), color.green(), color.blue(), 63 ); | ||
| mBrush.setColor( fillColor ); | ||
| mBrush.setStyle( Qt::SolidPattern ); | ||
| } | ||
|
|
||
| /*! | ||
| Set the outline width. | ||
| */ | ||
| void QgsHighlight::setWidth( int width ) | ||
| { | ||
| mPen.setWidth( width ); | ||
| } | ||
|
|
||
| void QgsHighlight::paintPoint( QPainter *p, QgsPoint point ) | ||
| { | ||
| QPolygonF r( 5 ); | ||
|
|
||
| double d = mMapCanvas->extent().width() * 0.005; | ||
|
|
||
| if ( mLayer ) | ||
| { | ||
| point = mMapCanvas->mapRenderer()->layerToMapCoordinates( mLayer, point ); | ||
| } | ||
|
|
||
| r[0] = toCanvasCoordinates( point + QgsVector( -d, -d ) ) - pos(); | ||
| r[1] = toCanvasCoordinates( point + QgsVector( d, -d ) ) - pos(); | ||
| r[2] = toCanvasCoordinates( point + QgsVector( d, d ) ) - pos(); | ||
| r[3] = toCanvasCoordinates( point + QgsVector( -d, d ) ) - pos(); | ||
| r[4] = r[0]; | ||
|
|
||
| p->drawPolygon( r ); | ||
| } | ||
|
|
||
| void QgsHighlight::paintLine( QPainter *p, QgsPolyline line ) | ||
| { | ||
| QPolygonF polygon( line.size() ); | ||
|
|
||
| for ( int i = 0; i < line.size(); i++ ) | ||
| { | ||
| if ( mLayer ) | ||
| { | ||
| line[i] = mMapCanvas->mapRenderer()->layerToMapCoordinates( mLayer, line[i] ); | ||
| } | ||
|
|
||
| polygon[i] = toCanvasCoordinates( line[i] ) - pos(); | ||
| } | ||
|
|
||
| p->drawPolyline( polygon ); | ||
| } | ||
|
|
||
| void QgsHighlight::paintPolygon( QPainter *p, QgsPolygon polygon ) | ||
| { | ||
| QPolygonF poly; | ||
|
|
||
| // just ring outlines, no fill | ||
| p->setPen( mPen ); | ||
| p->setBrush( Qt::NoBrush ); | ||
|
|
||
| for ( int i = 0; i < polygon.size(); i++ ) | ||
| { | ||
| QPolygonF ring( polygon[i].size() + 1 ); | ||
|
|
||
| for ( int j = 0; j < polygon[i].size(); j++ ) | ||
| { | ||
| if ( mLayer ) | ||
| { | ||
| polygon[i][j] = mMapCanvas->mapRenderer()->layerToMapCoordinates( mLayer, polygon[i][j] ); | ||
| } | ||
|
|
||
| ring[ j ] = toCanvasCoordinates( polygon[i][j] ) - pos(); | ||
| } | ||
|
|
||
| ring[ polygon[i].size()] = ring[ 0 ]; | ||
|
|
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| p->drawPolygon( ring ); | ||
|
|
||
| if ( i == 0 ) | ||
| poly = ring; | ||
| else | ||
| poly = poly.subtracted( ring ); | ||
|
|
||
| } | ||
|
|
||
| // just fill, no outline | ||
| p->setPen( Qt::NoPen ); | ||
| p->setBrush( mBrush ); | ||
| p->drawPolygon( poly ); | ||
| } | ||
|
|
||
| /*! | ||
| Draw the shape in response to an update event. | ||
| */ | ||
| void QgsHighlight::paint( QPainter* p ) | ||
| { | ||
| QgsDebugMsg( "entered." ); | ||
|
|
||
| if ( !mGeometry ) | ||
| { | ||
| QgsDebugMsg( "no geometry." ); | ||
| return; | ||
| } | ||
|
|
||
| p->setPen( mPen ); | ||
| p->setBrush( mBrush ); | ||
|
|
||
| switch ( mGeometry->wkbType() ) | ||
| { | ||
| case QGis::WKBPoint: | ||
| case QGis::WKBPoint25D: | ||
| { | ||
| paintPoint( p, mGeometry->asPoint() ); | ||
| } | ||
| break; | ||
|
|
||
| case QGis::WKBMultiPoint: | ||
| case QGis::WKBMultiPoint25D: | ||
| { | ||
| QgsMultiPoint m = mGeometry->asMultiPoint(); | ||
| for ( int i = 0; i < m.size(); i++ ) | ||
| { | ||
| paintPoint( p, m[i] ); | ||
| } | ||
| } | ||
| break; | ||
|
|
||
| case QGis::WKBLineString: | ||
| case QGis::WKBLineString25D: | ||
| { | ||
| paintLine( p, mGeometry->asPolyline() ); | ||
| } | ||
| break; | ||
|
|
||
| case QGis::WKBMultiLineString: | ||
| case QGis::WKBMultiLineString25D: | ||
| { | ||
| QgsMultiPolyline m = mGeometry->asMultiPolyline(); | ||
|
|
||
| for ( int i = 0; i < m.size(); i++ ) | ||
| { | ||
| paintLine( p, m[i] ); | ||
| } | ||
| } | ||
| break; | ||
|
|
||
| case QGis::WKBPolygon: | ||
| case QGis::WKBPolygon25D: | ||
| { | ||
| paintPolygon( p, mGeometry->asPolygon() ); | ||
| } | ||
| break; | ||
|
|
||
| case QGis::WKBMultiPolygon: | ||
| case QGis::WKBMultiPolygon25D: | ||
| { | ||
| QgsMultiPolygon m = mGeometry->asMultiPolygon(); | ||
| for ( int i = 0; i < m.size(); i++ ) | ||
| { | ||
| paintPolygon( p, m[i] ); | ||
| } | ||
| } | ||
| break; | ||
|
|
||
| case QGis::WKBUnknown: | ||
| default: | ||
| return; | ||
| } | ||
| } | ||
|
|
||
| void QgsHighlight::updateRect() | ||
| { | ||
| if ( mGeometry ) | ||
| { | ||
| QgsRectangle r = mGeometry->boundingBox(); | ||
|
|
||
| if ( r.isEmpty() ) | ||
| { | ||
| double d = mMapCanvas->extent().width() * 0.005; | ||
| r.setXMinimum( r.xMinimum() - d ); | ||
| r.setYMinimum( r.yMinimum() - d ); | ||
| r.setXMaximum( r.xMaximum() + d ); | ||
| r.setXMaximum( r.yMaximum() + d ); | ||
| } | ||
|
|
||
| setRect( r ); | ||
| setVisible( mGeometry ); | ||
| } | ||
| else | ||
| { | ||
| setRect( QgsRectangle() ); | ||
| } | ||
|
|
||
| } | ||
|
|
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