-
-
Notifications
You must be signed in to change notification settings - Fork 3k
/
qgsmaptoolselectradius.cpp
111 lines (98 loc) · 3.14 KB
/
qgsmaptoolselectradius.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
/***************************************************************************
qgsmaptoolselectradius.cpp - map tool for selecting features by radius
---------------------
begin : May 2010
copyright : (C) 2010 by Jeremy Palmer
email : jpalmer at linz dot govt dot nz
***************************************************************************
* *
* 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 "qgsmaptoolselectradius.h"
#include "qgsmaptoolselectutils.h"
#include "qgsgeometry.h"
#include "qgsrubberband.h"
#include "qgsmapcanvas.h"
#include "qgis.h"
#include "qgslogger.h"
#include <cmath>
#include <QMouseEvent>
#ifndef M_PI
#define M_PI 3.1415926535897931159979634685
#endif
const int RADIUS_SEGMENTS = 40;
QgsMapToolSelectRadius::QgsMapToolSelectRadius( QgsMapCanvas* canvas )
: QgsMapTool( canvas ), mDragging( false )
{
mRubberBand = 0;
mCursor = Qt::ArrowCursor;
}
QgsMapToolSelectRadius::~QgsMapToolSelectRadius()
{
delete mRubberBand;
}
void QgsMapToolSelectRadius::canvasPressEvent( QMouseEvent * e )
{
if ( e->button() != Qt::LeftButton )
{
return;
}
mRadiusCenter = toMapCoordinates( e->pos() );
}
void QgsMapToolSelectRadius::canvasMoveEvent( QMouseEvent * e )
{
if ( e->buttons() != Qt::LeftButton )
{
return;
}
if ( !mDragging )
{
if ( mRubberBand == NULL )
{
mRubberBand = new QgsRubberBand( mCanvas, QGis::Polygon );
}
mDragging = true;
}
QgsPoint radiusEdge = toMapCoordinates( e->pos() );
setRadiusRubberBand( radiusEdge );
}
void QgsMapToolSelectRadius::canvasReleaseEvent( QMouseEvent * e )
{
if ( e->button() != Qt::LeftButton )
{
return;
}
if ( !mDragging )
{
if ( mRubberBand == NULL )
{
mRubberBand = new QgsRubberBand( mCanvas, QGis::Polygon );
}
mRadiusCenter = toMapCoordinates( e->pos() );
QgsPoint radiusEdge = toMapCoordinates( QPoint( e->pos().x() + 1, e->pos().y() + 1 ) );
setRadiusRubberBand( radiusEdge );
}
QgsGeometry* radiusGeometry = mRubberBand->asGeometry();
QgsMapToolSelectUtils::setSelectFeatures( mCanvas, radiusGeometry, e );
delete radiusGeometry;
mRubberBand->reset( QGis::Polygon );
delete mRubberBand;
mRubberBand = 0;
mDragging = false;
}
void QgsMapToolSelectRadius::setRadiusRubberBand( QgsPoint & radiusEdge )
{
double r = sqrt( mRadiusCenter.sqrDist( radiusEdge ) );
mRubberBand->reset( QGis::Polygon );
for ( int i = 0; i <= RADIUS_SEGMENTS; ++i )
{
double theta = i * ( 2.0 * M_PI / RADIUS_SEGMENTS );
QgsPoint radiusPoint( mRadiusCenter.x() + r * cos( theta ),
mRadiusCenter.y() + r * sin( theta ) );
mRubberBand->addPoint( radiusPoint );
}
}