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author
mhugent
committedMay 13, 2007
Forgot to add files in the last commit
git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@6943 c8812cc2-4d05-0410-92ff-de0c093fc19c
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final-1_7_1Preview-0.9.0-1
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‎src/app/qgsmaptooladdring.cpp

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/***************************************************************************
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qgsmaptooladdring.cpp - map tool to cut rings in polygon and multipolygon features
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---------------------
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begin : April 2007
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copyright : (C) 2007 by Marco Hugentobler
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email : marco dot hugentobler at karto dot baug dot ethz dot ch
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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/* $Id$ */
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#include "qgsmaptooladdring.h"
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#include "qgsgeometry.h"
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#include "qgsmapcanvas.h"
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#include "qgsproject.h"
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#include "qgsrubberband.h"
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#include "qgsvectorlayer.h"
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#include <QMessageBox>
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QgsMapToolAddRing::QgsMapToolAddRing(QgsMapCanvas* canvas): QgsMapToolCapture(canvas, QgsMapToolCapture::CapturePolygon)
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{
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}
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QgsMapToolAddRing::~QgsMapToolAddRing()
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{
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}
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void QgsMapToolAddRing::canvasReleaseEvent(QMouseEvent * e)
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{
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//check if we operate on a vector layer
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QgsVectorLayer *vlayer = dynamic_cast <QgsVectorLayer*>(mCanvas->currentLayer());
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if (!vlayer)
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{
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QMessageBox::information(0, QObject::tr("Not a vector layer"), \
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QObject::tr("The current layer is not a vector layer"));
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return;
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}
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if (!vlayer->isEditable())
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{
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QMessageBox::information(0, QObject::tr("Layer not editable"),
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QObject::tr("Cannot edit the vector layer. To make it editable, go to the file item "
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"of the layer, right click and check 'Allow Editing'."));
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return;
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}
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//add point to list and to rubber band
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int error = addVertex(e->pos());
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if(error == 1)
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{
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//current layer is not a vector layer
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return;
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}
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else if (error == 2)
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{
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//problem with coordinate transformation
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QMessageBox::information(0, QObject::tr("Coordinate transform error"), \
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QObject::tr("Cannot transform the point to the layers coordinate system"));
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return;
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}
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if (e->button() == Qt::LeftButton)
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{
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mCapturing = TRUE;
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}
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else if (e->button() == Qt::RightButton)
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{
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mCapturing = FALSE;
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delete mRubberBand;
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mRubberBand = 0;
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//close polygon
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mCaptureList.push_back(*mCaptureList.begin());
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int addRingReturnCode = vlayer->addRing(mCaptureList);
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if(addRingReturnCode != 0)
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{
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QString errorMessage;
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//todo: open message box to communicate errors
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if(addRingReturnCode == 1)
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{
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errorMessage = QObject::tr("A problem with geometry type occured");
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}
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else if(addRingReturnCode == 2)
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{
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errorMessage = QObject::tr("The inserted Ring is not closed");
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}
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else if(addRingReturnCode == 3)
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{
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errorMessage = QObject::tr("The inserted Ring is not a valid geometry");
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}
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else if(addRingReturnCode == 4)
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{
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errorMessage = QObject::tr("The inserted Ring crosses existing rings");
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}
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else if(addRingReturnCode == 5)
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{
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errorMessage = QObject::tr("The inserted Ring is not contained in a feature");
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}
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else
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{
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errorMessage = QObject::tr("An unknown error occured");
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}
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QMessageBox::critical(0, QObject::tr("Error, could not add ring"), errorMessage);
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}
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mCaptureList.clear();
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mCanvas->refresh();
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}
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}

‎src/app/qgsmaptooladdring.h

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/***************************************************************************
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qgsmaptooladdring.h - map tool to cut rings in polygon and multipolygon features
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---------------------
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begin : April 2007
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copyright : (C) 2007 by Marco Hugentobler
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email : marco dot hugentobler at karto dot baug dot ethz dot ch
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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/* $Id$ */
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#include "qgsmaptoolcapture.h"
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/**A tool to cut holes into polygons and multipolygon features*/
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class QgsMapToolAddRing: public QgsMapToolCapture
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{
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public:
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QgsMapToolAddRing(QgsMapCanvas* canvas);
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~QgsMapToolAddRing();
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void canvasReleaseEvent(QMouseEvent * e);
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};

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