-
-
Notifications
You must be signed in to change notification settings - Fork 3k
/
qgsmaptoolfillring.cpp
234 lines (202 loc) · 7.04 KB
/
qgsmaptoolfillring.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
/***************************************************************************
qgsmaptoolfillring.h - map tool to cut rings in polygon and multipolygon
features and fill them with new feature
---------------------
begin : December 2013
copyright : (C) 2013 by Alexander Bruy
email : alexander dot bruy at gmail dot com
***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include "qgsmaptoolfillring.h"
#include "qgsgeometry.h"
#include "qgsfeatureiterator.h"
#include "qgsmapcanvas.h"
#include "qgsvectorlayer.h"
#include "qgsattributedialog.h"
#include "qgisapp.h"
#include "qgsvectorlayerutils.h"
#include "qgsmapmouseevent.h"
#include <limits>
QgsMapToolFillRing::QgsMapToolFillRing( QgsMapCanvas *canvas )
: QgsMapToolCapture( canvas, QgisApp::instance()->cadDockWidget(), QgsMapToolCapture::CapturePolygon )
{
}
void QgsMapToolFillRing::cadCanvasReleaseEvent( QgsMapMouseEvent *e )
{
//check if we operate on a vector layer
QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( mCanvas->currentLayer() );
if ( !vlayer )
{
notifyNotVectorLayer();
return;
}
if ( !vlayer->isEditable() )
{
notifyNotEditableLayer();
return;
}
if ( e->button() == Qt::LeftButton && QApplication::keyboardModifiers() == Qt::ShiftModifier && !isCapturing() )
{
// left button with shift fills an existing ring
}
else if ( e->button() == Qt::LeftButton )
{
// add point to list and to rubber band
int error = addVertex( e->mapPoint() );
if ( error == 1 )
{
// current layer is not a vector layer
return;
}
else if ( error == 2 )
{
// problem with coordinate transformation
emit messageEmitted( tr( "Cannot transform the point to the layers coordinate system" ), Qgis::Warning );
return;
}
startCapturing();
return;
}
else if ( e->button() != Qt::RightButton || !isCapturing() )
{
return;
}
QgsGeometry g;
QgsFeatureId fid;
if ( isCapturing() )
{
deleteTempRubberBand();
closePolygon();
vlayer->beginEditCommand( tr( "Ring added and filled" ) );
QVector< QgsPointXY > pointList = points();
QgsGeometry::OperationResult addRingReturnCode = vlayer->addRing( pointList, &fid );
// AP: this is all dead code:
//todo: open message box to communicate errors
if ( addRingReturnCode != QgsGeometry::OperationResult::Success )
{
QString errorMessage;
if ( addRingReturnCode == QgsGeometry::OperationResult::InvalidInputGeometryType )
{
errorMessage = tr( "a problem with geometry type occurred" );
}
else if ( addRingReturnCode == QgsGeometry::OperationResult::AddRingNotClosed )
{
errorMessage = tr( "the inserted Ring is not closed" );
}
else if ( addRingReturnCode == QgsGeometry::OperationResult::AddRingNotValid )
{
errorMessage = tr( "the inserted Ring is not a valid geometry" );
}
else if ( addRingReturnCode == QgsGeometry::OperationResult::AddRingCrossesExistingRings )
{
errorMessage = tr( "the inserted Ring crosses existing rings" );
}
else if ( addRingReturnCode == QgsGeometry::OperationResult::AddRingNotInExistingFeature )
{
errorMessage = tr( "the inserted Ring is not contained in a feature" );
}
else
{
errorMessage = tr( "an unknown error occurred" );
}
emit messageEmitted( tr( "could not add ring since %1." ).arg( errorMessage ), Qgis::Critical );
vlayer->destroyEditCommand();
return;
}
g = QgsGeometry::fromPolygonXY( QgsPolygonXY() << pointList );
}
else
{
vlayer->beginEditCommand( tr( "Ring filled" ) );
g = ringUnderPoint( e->mapPoint(), fid );
if ( fid == -1 )
{
emit messageEmitted( tr( "No ring found to fill." ), Qgis::Critical );
vlayer->destroyEditCommand();
return;
}
}
QgsExpressionContext context = vlayer->createExpressionContext();
QgsFeatureIterator fit = vlayer->getFeatures( QgsFeatureRequest().setFilterFid( fid ) );
QgsFeature f;
if ( fit.nextFeature( f ) )
{
//create QgsFeature with wkb representation
QgsFeature ft = QgsVectorLayerUtils::createFeature( vlayer, g, f.attributes().toMap(), &context );
bool res = false;
if ( QApplication::keyboardModifiers() == Qt::ControlModifier )
{
res = vlayer->addFeature( ft );
}
else
{
QgsAttributeDialog *dialog = new QgsAttributeDialog( vlayer, &ft, false, nullptr, true );
dialog->setMode( QgsAttributeEditorContext::AddFeatureMode );
res = dialog->exec(); // will also add the feature
}
if ( res )
{
vlayer->endEditCommand();
}
else
{
vlayer->destroyEditCommand();
}
}
if ( isCapturing() )
stopCapturing();
}
// TODO refactor - shamelessly copied from QgsMapToolDeleteRing::ringUnderPoint
QgsGeometry QgsMapToolFillRing::ringUnderPoint( const QgsPointXY &p, QgsFeatureId &fid )
{
//check if we operate on a vector layer
QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( mCanvas->currentLayer() );
//There is no clean way to find if we are inside the ring of a feature,
//so we iterate over all the features visible in the canvas
//If several rings are found at this position, the smallest one is chosen,
//in order to be able to delete a ring inside another ring
double area = std::numeric_limits<double>::max();
QgsGeometry ringGeom;
QgsFeatureIterator fit = vlayer->getFeatures( QgsFeatureRequest().setFilterRect( toLayerCoordinates( vlayer, mCanvas->extent() ) ) );
QgsFeature f;
while ( fit.nextFeature( f ) )
{
QgsGeometry g = f.geometry();
if ( g.isNull() || QgsWkbTypes::geometryType( g.wkbType() ) != QgsWkbTypes::PolygonGeometry )
continue;
QgsMultiPolygonXY pol;
if ( !QgsWkbTypes::isMultiType( g.wkbType() ) )
{
pol = QgsMultiPolygonXY() << g.asPolygon();
}
else
{
pol = g.asMultiPolygon();
}
for ( int i = 0; i < pol.size() ; ++i )
{
//for each part
if ( pol[i].size() > 1 )
{
for ( int j = 1; j < pol[i].size(); ++j )
{
QgsPolygonXY tempPol = QgsPolygonXY() << pol[i][j];
QgsGeometry tempGeom = QgsGeometry::fromPolygonXY( tempPol );
if ( tempGeom.area() < area && tempGeom.contains( &p ) )
{
fid = f.id();
area = tempGeom.area();
ringGeom = tempGeom;
}
}
}
}
}
return ringGeom;
}