-
-
Notifications
You must be signed in to change notification settings - Fork 3k
/
qgsmaptoolrotatepointsymbols.cpp
246 lines (216 loc) · 6.75 KB
/
qgsmaptoolrotatepointsymbols.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
/***************************************************************************
qgsmaptoolrotatepointsymbols.cpp
--------------------------------
begin : September 2009
copyright : (C) 2009 by Marco Hugentobler
email : marco at hugis dot net
***************************************************************************
* *
* 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 "qgsmaptoolrotatepointsymbols.h"
#include "qgsapplication.h"
#include "qgsmapcanvas.h"
#include "qgspointrotationitem.h"
#include "qgsrenderer.h"
#include "qgssnappingutils.h"
#include "qgssymbol.h"
#include "qgsvectorlayer.h"
#include "qgsproperty.h"
#include "qgisapp.h"
#include <QGraphicsPixmapItem>
#include <QMouseEvent>
QgsMapToolRotatePointSymbols::QgsMapToolRotatePointSymbols( QgsMapCanvas *canvas )
: QgsMapToolPointSymbol( canvas )
, mCurrentMouseAzimut( 0.0 )
, mCurrentRotationFeature( 0.0 )
, mRotating( false )
, mCtrlPressed( false )
{}
QgsMapToolRotatePointSymbols::~QgsMapToolRotatePointSymbols()
{
delete mRotationItem;
}
bool QgsMapToolRotatePointSymbols::layerIsRotatable( QgsMapLayer *ml )
{
if ( !ml )
{
return false;
}
//a vector layer
QgsVectorLayer *vLayer = qobject_cast<QgsVectorLayer *>( ml );
if ( !vLayer )
{
return false;
}
//does it have point or multipoint type?
if ( vLayer->geometryType() != QgsWkbTypes::PointGeometry )
{
return false;
}
//we consider all point layers as rotatable, as data defined rotation can be set on a per
//symbol/feature basis
return true;
}
void QgsMapToolRotatePointSymbols::canvasPressEvent( QgsMapMouseEvent *e )
{
mCurrentRotationAttributes.clear();
mMarkerSymbol.reset( nullptr );
QgsMapToolPointSymbol::canvasPressEvent( e );
}
void QgsMapToolRotatePointSymbols::canvasPressOnFeature( QgsMapMouseEvent *e, const QgsFeature &feature, const QgsPointXY &snappedPoint )
{
//find out initial arrow direction
QVariant attrVal = feature.attribute( mCurrentRotationAttributes.toList().at( 0 ) );
mCurrentRotationFeature = attrVal.toDouble();
createPixmapItem( mMarkerSymbol.get() );
if ( mRotationItem )
{
mRotationItem->setPointLocation( snappedPoint );
}
mCurrentMouseAzimut = calculateAzimut( e->pos() );
setPixmapItemRotation( ( int )( mCurrentMouseAzimut ) );
mRotating = true;
}
bool QgsMapToolRotatePointSymbols::checkSymbolCompatibility( QgsMarkerSymbol *markerSymbol, QgsRenderContext & )
{
bool ok = false;
QgsProperty ddAngle( markerSymbol->dataDefinedAngle() );
if ( ddAngle && ddAngle.isActive() && ddAngle.propertyType() == QgsProperty::FieldBasedProperty )
{
mCurrentRotationAttributes << mActiveLayer->fields().indexFromName( ddAngle.field() );
ok = true;
if ( !mMarkerSymbol )
{
mMarkerSymbol.reset( markerSymbol->clone() );
}
}
return ok;
}
void QgsMapToolRotatePointSymbols::noCompatibleSymbols()
{
emit messageEmitted( tr( "The selected point does not have a rotation attribute set." ), Qgis::Critical );
}
void QgsMapToolRotatePointSymbols::canvasMoveEvent( QgsMapMouseEvent *e )
{
if ( !mRotating )
{
return;
}
double azimut = calculateAzimut( e->pos() );
double azimutDiff = azimut - mCurrentMouseAzimut;
//assign new feature rotation, making sure to respect the 0 - 360 degree range
mCurrentRotationFeature += azimutDiff;
if ( mCurrentRotationFeature < 0 )
{
mCurrentRotationFeature = 360 - mCurrentRotationFeature;
}
else if ( mCurrentRotationFeature >= 360 )
{
mCurrentRotationFeature -= 360;
}
mCurrentMouseAzimut = azimut;
if ( mCurrentMouseAzimut < 0 )
{
mCurrentMouseAzimut = 360 - mCurrentMouseAzimut;
}
else if ( mCurrentMouseAzimut >= 360 )
{
mCurrentMouseAzimut -= 360;
}
//if shift-modifier is pressed, round to 15 degrees
int displayValue;
if ( e->modifiers() & Qt::ControlModifier )
{
displayValue = roundTo15Degrees( mCurrentRotationFeature );
mCtrlPressed = true;
}
else
{
displayValue = ( int )( mCurrentRotationFeature );
mCtrlPressed = false;
}
setPixmapItemRotation( displayValue );
}
void QgsMapToolRotatePointSymbols::canvasReleaseEvent( QgsMapMouseEvent *e )
{
Q_UNUSED( e );
if ( mRotating && mActiveLayer )
{
mActiveLayer->beginEditCommand( tr( "Rotate symbol" ) );
bool rotateSuccess = true;
//write mCurrentRotationFeature to all rotation attributes of feature (mFeatureNumber)
int rotation;
if ( mCtrlPressed ) //round to 15 degrees
{
rotation = roundTo15Degrees( mCurrentRotationFeature );
}
else
{
rotation = static_cast<int>( mCurrentRotationFeature );
}
QSet<int>::const_iterator it = mCurrentRotationAttributes.constBegin();
for ( ; it != mCurrentRotationAttributes.constEnd(); ++it )
{
if ( !mActiveLayer->changeAttributeValue( mFeatureNumber, *it, rotation ) )
{
rotateSuccess = false;
}
}
if ( rotateSuccess )
{
mActiveLayer->endEditCommand();
}
else
{
mActiveLayer->destroyEditCommand();
}
}
mRotating = false;
delete mRotationItem;
mRotationItem = nullptr;
if ( mActiveLayer )
mActiveLayer->triggerRepaint();
}
double QgsMapToolRotatePointSymbols::calculateAzimut( QPoint mousePos )
{
int dx = mousePos.x() - mSnappedPoint.x();
int dy = mousePos.y() - mSnappedPoint.y();
return 180 - std::atan2( ( double ) dx, ( double ) dy ) * 180.0 / M_PI;
}
void QgsMapToolRotatePointSymbols::createPixmapItem( QgsMarkerSymbol *markerSymbol )
{
if ( !mCanvas )
{
return;
}
//get the image that is used for that symbol, but without point rotation
QImage pointImage;
if ( markerSymbol )
{
QgsSymbol *clone = markerSymbol->clone();
QgsMarkerSymbol *markerClone = static_cast<QgsMarkerSymbol *>( clone );
markerClone->setDataDefinedAngle( QgsProperty() );
pointImage = markerClone->bigSymbolPreviewImage();
delete clone;
}
mRotationItem = new QgsPointRotationItem( mCanvas );
mRotationItem->setSymbol( pointImage );
}
void QgsMapToolRotatePointSymbols::setPixmapItemRotation( double rotation )
{
if ( mRotationItem )
{
mRotationItem->setSymbolRotation( rotation );
mRotationItem->update();
}
}
int QgsMapToolRotatePointSymbols::roundTo15Degrees( double n )
{
int m = ( int )( n / 15.0 + 0.5 );
return ( m * 15 );
}