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git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@6943 c8812cc2-4d05-0410-92ff-de0c093fc19c
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mhugent committed May 13, 2007
1 parent 7463a76 commit 87d55d30a71c0e34861ee474ec6b406da32b03f5
Showing with 143 additions and 0 deletions.
  1. +117 −0 src/app/qgsmaptooladdring.cpp
  2. +26 −0 src/app/qgsmaptooladdring.h
@@ -0,0 +1,117 @@
/***************************************************************************
qgsmaptooladdring.cpp - map tool to cut rings in polygon and multipolygon features
---------------------
begin : April 2007
copyright : (C) 2007 by Marco Hugentobler
email : marco dot hugentobler at karto dot baug dot ethz dot ch
***************************************************************************
* *
* 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 "qgsmaptooladdring.h"
#include "qgsgeometry.h"
#include "qgsmapcanvas.h"
#include "qgsproject.h"
#include "qgsrubberband.h"
#include "qgsvectorlayer.h"
#include <QMessageBox>

QgsMapToolAddRing::QgsMapToolAddRing(QgsMapCanvas* canvas): QgsMapToolCapture(canvas, QgsMapToolCapture::CapturePolygon)
{

}

QgsMapToolAddRing::~QgsMapToolAddRing()
{

}

void QgsMapToolAddRing::canvasReleaseEvent(QMouseEvent * e)
{
//check if we operate on a vector layer
QgsVectorLayer *vlayer = dynamic_cast <QgsVectorLayer*>(mCanvas->currentLayer());

if (!vlayer)
{
QMessageBox::information(0, QObject::tr("Not a vector layer"), \
QObject::tr("The current layer is not a vector layer"));
return;
}

if (!vlayer->isEditable())
{
QMessageBox::information(0, QObject::tr("Layer not editable"),
QObject::tr("Cannot edit the vector layer. To make it editable, go to the file item "
"of the layer, right click and check 'Allow Editing'."));
return;
}

//add point to list and to rubber band
int error = addVertex(e->pos());
if(error == 1)
{
//current layer is not a vector layer
return;
}
else if (error == 2)
{
//problem with coordinate transformation
QMessageBox::information(0, QObject::tr("Coordinate transform error"), \
QObject::tr("Cannot transform the point to the layers coordinate system"));
return;
}

if (e->button() == Qt::LeftButton)
{
mCapturing = TRUE;
}
else if (e->button() == Qt::RightButton)
{
mCapturing = FALSE;
delete mRubberBand;
mRubberBand = 0;

//close polygon
mCaptureList.push_back(*mCaptureList.begin());

int addRingReturnCode = vlayer->addRing(mCaptureList);
if(addRingReturnCode != 0)
{
QString errorMessage;
//todo: open message box to communicate errors
if(addRingReturnCode == 1)
{
errorMessage = QObject::tr("A problem with geometry type occured");
}
else if(addRingReturnCode == 2)
{
errorMessage = QObject::tr("The inserted Ring is not closed");
}
else if(addRingReturnCode == 3)
{
errorMessage = QObject::tr("The inserted Ring is not a valid geometry");
}
else if(addRingReturnCode == 4)
{
errorMessage = QObject::tr("The inserted Ring crosses existing rings");
}
else if(addRingReturnCode == 5)
{
errorMessage = QObject::tr("The inserted Ring is not contained in a feature");
}
else
{
errorMessage = QObject::tr("An unknown error occured");
}
QMessageBox::critical(0, QObject::tr("Error, could not add ring"), errorMessage);
}
mCaptureList.clear();
mCanvas->refresh();
}
}
@@ -0,0 +1,26 @@
/***************************************************************************
qgsmaptooladdring.h - map tool to cut rings in polygon and multipolygon features
---------------------
begin : April 2007
copyright : (C) 2007 by Marco Hugentobler
email : marco dot hugentobler at karto dot baug dot ethz dot ch
***************************************************************************
* *
* 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 "qgsmaptoolcapture.h"

/**A tool to cut holes into polygons and multipolygon features*/
class QgsMapToolAddRing: public QgsMapToolCapture
{
public:
QgsMapToolAddRing(QgsMapCanvas* canvas);
~QgsMapToolAddRing();
void canvasReleaseEvent(QMouseEvent * e);
};

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