-
-
Notifications
You must be signed in to change notification settings - Fork 3k
/
qgsmaptoolcapture.cpp
320 lines (269 loc) · 10.2 KB
/
qgsmaptoolcapture.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
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
/***************************************************************************
qgsmaptoolcapture.cpp - map tool for capturing points, lines, polygons
---------------------
begin : January 2006
copyright : (C) 2006 by Martin Dobias
email : wonder.sk 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. *
* *
***************************************************************************/
/* $Id$ */
#include "qgsattributedialog.h"
#include "qgsmaptoolcapture.h"
#include "qgsmapcanvas.h"
#include "qgsmaptopixel.h"
#include "qgsfeature.h"
#include "qgsproject.h"
#include "qgsrubberband.h"
#include "qgsvectorlayer.h"
#include "qgsvectordataprovider.h"
#include "qgscursors.h"
#include <QCursor>
#include <QPixmap>
#include <QMessageBox>
QgsMapToolCapture::QgsMapToolCapture(QgsMapCanvas* canvas, enum CaptureTool tool)
: QgsMapTool(canvas), mTool(tool), mRubberBand(0)
{
mCapturing = FALSE;
QPixmap mySelectQPixmap = QPixmap((const char **) capture_point_cursor);
mCursor = QCursor(mySelectQPixmap, 8, 8);
}
QgsMapToolCapture::~QgsMapToolCapture()
{
delete mRubberBand;
mRubberBand = 0;
}
QgsPoint QgsMapToolCapture::maybeInversePoint(QgsPoint point, const char whenmsg[])
{
QgsVectorLayer *vlayer = dynamic_cast <QgsVectorLayer*>(mCanvas->currentLayer());
QgsPoint transformedPoint;
if( mCanvas->projectionsEnabled() )
{
// Do reverse transformation before saving. If possible!
try
{
transformedPoint = vlayer->coordinateTransform()->transform(point, QgsCoordinateTransform::INVERSE);
}
catch(QgsCsException &cse)
{
//#ifdef QGISDEBUG
std::cout << "Caught transform error when " << whenmsg <<"."
<< "Setting untransformed values." << std::endl;
//#endif
// Transformation failed,. Bail out with original rectangle.
return point;
}
return transformedPoint;
}
return point;
}
void QgsMapToolCapture::canvasReleaseEvent(QMouseEvent * e)
{
QgsVectorLayer *vlayer = dynamic_cast <QgsVectorLayer*>(mCanvas->currentLayer());
if (!vlayer)
{
QMessageBox::information(0,"Not a vector layer","The current layer is not a vector layer",QMessageBox::Ok);
return;
}
if (!vlayer->isEditable())
{
QMessageBox::information(0,"Layer not editable",
"Cannot edit the vector layer. To make it editable, go to the file item of the layer, right click and check 'Allow Editing'.",
QMessageBox::Ok);
return;
}
double tolerance = QgsProject::instance()->readDoubleEntry("Digitizing","/Tolerance",0);
// POINT CAPTURING
if (mTool == CapturePoint)
{
//check we only use this tool for point/multipoint layers
if(vlayer->vectorType() != QGis::Point)
{
QMessageBox::information(0,"Wrong editing tool", "Cannot apply the 'capture point' tool on this vector layer",\
QMessageBox::Ok);
return;
}
QgsPoint idPoint = toMapCoords(e->pos());
// emit signal - QgisApp can catch it and save point position to clipboard
// FIXME: is this still actual or something old that's not used anymore?
//emit xyClickCoordinates(idPoint);
//only do the rest for provider with feature addition support
//note that for the grass provider, this will return false since
//grass provider has its own mechanism of feature addition
if(vlayer->getDataProvider()->capabilities()&QgsVectorDataProvider::AddFeatures)
{
QgsFeature* f = new QgsFeature(0,"WKBPoint");
QgsPoint savePoint = maybeInversePoint(idPoint, "adding point");
// snap point to points within the vector layer snapping tolerance
// project to layer's SRS
vlayer->snapPoint(savePoint, tolerance);
// create geos geometry and attach it to feature
int size=5+2*sizeof(double);
unsigned char *wkb = new unsigned char[size];
int wkbtype=QGis::WKBPoint;
double x = savePoint.x();
double y = savePoint.y();
memcpy(&wkb[1],&wkbtype, sizeof(int));
memcpy(&wkb[5], &x, sizeof(double));
memcpy(&wkb[5]+sizeof(double), &y, sizeof(double));
f->setGeometryAndOwnership(&wkb[0],size);
// add the fields to the QgsFeature
std::vector<QgsField> fields=vlayer->fields();
for(std::vector<QgsField>::iterator it=fields.begin();it!=fields.end();++it)
{
f->addAttribute((*it).name(), vlayer->getDefaultValue(it->name(),f));
}
// show the dialog to enter attribute values
if (QgsAttributeDialog::queryAttributes(*f))
vlayer->addFeature(f);
else
delete f;
mCanvas->refresh();
}
}
else if (mTool == CaptureLine || mTool == CapturePolygon)
{
// LINE & POLYGON CAPTURING
//check we only use the line tool for line/multiline layers
if(mTool == CaptureLine && vlayer->vectorType() != QGis::Line)
{
QMessageBox::information(0,"Wrong editing tool", "Cannot apply the 'capture line' tool on this vector layer",\
QMessageBox::Ok);
return;
}
//check we only use the polygon tool for polygon/multipolygon layers
if(mTool == CapturePolygon && vlayer->vectorType() != QGis::Polygon)
{
QMessageBox::information(0,"Wrong editing tool", "Cannot apply the 'capture polygon' tool on this vector layer",\
QMessageBox::Ok);
return;
}
if (mCaptureList.size() == 0)
{
mRubberBand = new QgsRubberBand(mCanvas, mTool == CapturePolygon);
QgsProject* project = QgsProject::instance();
QColor color(
project->readNumEntry("Digitizing", "/LineColorRedPart", 255),
project->readNumEntry("Digitizing", "/LineColorGreenPart", 0),
project->readNumEntry("Digitizing", "/LineColorBluePart", 0));
mRubberBand->setColor(color);
mRubberBand->setWidth(project->readNumEntry("Digitizing", "/LineWidth", 1));
mRubberBand->show();
}
QgsPoint digitisedPoint = toMapCoords(e->pos());
vlayer->snapPoint(digitisedPoint, tolerance);
mCaptureList.push_back(digitisedPoint);
mRubberBand->addPoint(digitisedPoint);
if (e->button() == Qt::LeftButton)
{
mCapturing = TRUE;
}
else if (e->button() == Qt::RightButton)
{
// End of string
mCapturing = FALSE;
delete mRubberBand;
mRubberBand = NULL;
//create QgsFeature with wkb representation
QgsFeature* f = new QgsFeature(0,"WKBLineString");
unsigned char* wkb;
int size;
if(mTool == CaptureLine)
{
size=1+2*sizeof(int)+2*mCaptureList.size()*sizeof(double);
wkb= new unsigned char[size];
int wkbtype=QGis::WKBLineString;
int length=mCaptureList.size();
memcpy(&wkb[1],&wkbtype, sizeof(int));
memcpy(&wkb[5],&length, sizeof(int));
int position=1+2*sizeof(int);
double x,y;
for(std::list<QgsPoint>::iterator it=mCaptureList.begin();it!=mCaptureList.end();++it)
{
QgsPoint savePoint = maybeInversePoint(*it, "adding line");
x = savePoint.x();
y = savePoint.y();
memcpy(&wkb[position],&x,sizeof(double));
position+=sizeof(double);
memcpy(&wkb[position],&y,sizeof(double));
position+=sizeof(double);
}
}
else // polygon
{
size=1+3*sizeof(int)+2*(mCaptureList.size()+1)*sizeof(double);
wkb= new unsigned char[size];
int wkbtype=QGis::WKBPolygon;
int length=mCaptureList.size()+1;//+1 because the first point is needed twice
int numrings=1;
memcpy(&wkb[1],&wkbtype, sizeof(int));
memcpy(&wkb[1+sizeof(int)],&numrings,sizeof(int));
memcpy(&wkb[1+2*sizeof(int)],&length, sizeof(int));
int position=1+3*sizeof(int);
double x,y;
std::list<QgsPoint>::iterator it;
for(it=mCaptureList.begin();it!=mCaptureList.end();++it)
{
QgsPoint savePoint = maybeInversePoint(*it, "adding poylgon");
x = savePoint.x();
y = savePoint.y();
memcpy(&wkb[position],&x,sizeof(double));
position+=sizeof(double);
memcpy(&wkb[position],&y,sizeof(double));
position+=sizeof(double);
}
// close the polygon
it=mCaptureList.begin();
QgsPoint savePoint = maybeInversePoint(*it, "closing polygon");
x = savePoint.x();
y = savePoint.y();
memcpy(&wkb[position],&x,sizeof(double));
position+=sizeof(double);
memcpy(&wkb[position],&y,sizeof(double));
}
f->setGeometryAndOwnership(&wkb[0],size);
// add the fields to the QgsFeature
std::vector<QgsField> fields=vlayer->fields();
for(std::vector<QgsField>::iterator it=fields.begin();it!=fields.end();++it)
{
f->addAttribute((*it).name(),vlayer->getDefaultValue(it->name(), f));
}
if (QgsAttributeDialog::queryAttributes(*f))
vlayer->addFeature(f);
else
delete f;
// delete the elements of mCaptureList
mCaptureList.clear();
mCanvas->refresh();
}
}
} // mouseReleaseEvent
void QgsMapToolCapture::canvasMoveEvent(QMouseEvent * e)
{
if (mCapturing)
{
// show the rubber-band from the last click
QgsVectorLayer *vlayer = dynamic_cast <QgsVectorLayer*>(mCanvas->currentLayer());
double tolerance = QgsProject::instance()->readDoubleEntry("Digitizing","/Tolerance",0);
QgsPoint rbpoint = toMapCoords(e->pos());
vlayer->snapPoint(rbpoint, tolerance); //show snapping during dragging
mRubberBand->movePoint(rbpoint);
}
} // mouseMoveEvent
void QgsMapToolCapture::canvasPressEvent(QMouseEvent * e)
{
// nothing to be done
}
void QgsMapToolCapture::renderComplete()
{
}
void QgsMapToolCapture::deactivate()
{
delete mRubberBand;
mRubberBand = 0;
}