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[FEATURE] A reshape tool to apply to line/polygon geometries. The par…
…t of a geometry between the first and last intersection of the reshape line will be replaced git-svn-id: http://svn.osgeo.org/qgis/trunk@11500 c8812cc2-4d05-0410-92ff-de0c093fc19c
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mhugent
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Aug 25, 2009
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /*************************************************************************** | ||
| qgsmaptoolreshape.cpp | ||
| --------------------------- | ||
| begin : Juli 2009 | ||
| copyright : (C) 2009 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 "qgsmaptoolreshape.h" | ||
| #include "qgsgeometry.h" | ||
| #include "qgsmapcanvas.h" | ||
| #include "qgsrubberband.h" | ||
| #include "qgsvectorlayer.h" | ||
| #include <QMessageBox> | ||
| #include <QMouseEvent> | ||
|
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| QgsMapToolReshape::QgsMapToolReshape( QgsMapCanvas* canvas ): QgsMapToolCapture( canvas, QgsMapToolCapture::CaptureLine ) | ||
| { | ||
|
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| } | ||
|
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| QgsMapToolReshape::~QgsMapToolReshape() | ||
| { | ||
|
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| } | ||
|
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| void QgsMapToolReshape::canvasReleaseEvent( QMouseEvent * e ) | ||
| { | ||
| //check if we operate on a vector layer //todo: move this to a function in parent class to avoid duplication | ||
| QgsVectorLayer *vlayer = dynamic_cast <QgsVectorLayer*>( mCanvas->currentLayer() ); | ||
|
|
||
| if ( !vlayer ) | ||
| { | ||
| QMessageBox::information( 0, tr( "Not a vector layer" ), | ||
| tr( "The current layer is not a vector layer" ) ); | ||
| return; | ||
| } | ||
|
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||
| if ( !vlayer->isEditable() ) | ||
| { | ||
| QMessageBox::information( 0, tr( "Layer not editable" ), | ||
| 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; | ||
| } | ||
|
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||
| //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, tr( "Coordinate transform error" ), | ||
| tr( "Cannot transform the point to the layers coordinate system" ) ); | ||
| return; | ||
| } | ||
|
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| if ( e->button() == Qt::LeftButton ) | ||
| { | ||
| mCapturing = TRUE; | ||
| } | ||
| else if ( e->button() == Qt::RightButton ) | ||
| { | ||
| mCapturing = FALSE; | ||
| delete mRubberBand; | ||
| mRubberBand = 0; | ||
|
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| //find out bounding box of mCaptureList | ||
| if(mCaptureList.size() < 1) | ||
| { | ||
| return; | ||
| } | ||
| QgsPoint firstPoint = mCaptureList.at(0); | ||
| QgsRectangle bbox(firstPoint.x(), firstPoint.y(), firstPoint.x(), firstPoint.y()); | ||
| for(int i = 1; i < mCaptureList.size(); ++i) | ||
| { | ||
| bbox.combineExtentWith(mCaptureList.at(i).x(), mCaptureList.at(i).y()); | ||
| } | ||
|
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| //query all the features that intersect bounding box of capture line | ||
| vlayer->select(QgsAttributeList(), bbox, true, false); | ||
| QgsFeature f; | ||
| int reshapeReturn; | ||
| bool reshapeDone = false; | ||
|
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| vlayer->beginEditCommand( tr( "Reshape" ) ); | ||
| while(vlayer->nextFeature(f)) | ||
| { | ||
| //query geometry | ||
| //call geometry->reshape(mCaptureList) | ||
| //register changed geometry in vector layer | ||
| QgsGeometry* geom = f.geometry(); | ||
| if(geom) | ||
| { | ||
| reshapeReturn = geom->reshapeGeometry(mCaptureList); | ||
| if(reshapeReturn == 0) | ||
| { | ||
| vlayer->changeGeometry(f.id(), geom); | ||
| reshapeDone = true; | ||
| } | ||
| } | ||
| } | ||
|
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| if(reshapeDone) | ||
| { | ||
| vlayer->endEditCommand(); | ||
| } | ||
| else | ||
| { | ||
| vlayer->destroyEditCommand(); | ||
| } | ||
|
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| mCaptureList.clear(); | ||
| mCanvas->refresh(); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| /*************************************************************************** | ||
| qgsmaptoolreshape.h | ||
| --------------------- | ||
| begin : Juli 2009 | ||
| copyright : (C) 2009 by Marco Hugentobler | ||
| email : marco.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. * | ||
| * * | ||
| ***************************************************************************/ | ||
| /* $Id$ */ | ||
|
|
||
| #ifndef QGSMAPTOOLRESHAPE_H | ||
| #define QGSMAPTOOLRESHAPE_H | ||
|
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| #include "qgsmaptoolcapture.h" | ||
|
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| /**A map tool that draws a line and splits the features cut by the line*/ | ||
| class QgsMapToolReshape: public QgsMapToolCapture | ||
| { | ||
| public: | ||
| QgsMapToolReshape( QgsMapCanvas* canvas ); | ||
| virtual ~QgsMapToolReshape(); | ||
| void canvasReleaseEvent( QMouseEvent * e ); | ||
| }; | ||
|
|
||
| #endif |
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