/
transformer_analysis.py
159 lines (127 loc) · 5.63 KB
/
transformer_analysis.py
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
# -*- coding: utf-8 -*-
"""
/***************************************************************************
GateTransformer
A QGIS plugin
This plugin performs basic transformation on a line in qgis.
-------------------
begin : 2016-02-29
author : Stephen Law
copyright : (C) 2016 by Space Syntax Limited
email : s.law@spacesyntax.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 3 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
"""
from PyQt4.QtCore import *
from qgis.core import *
import math
from network_transformer_dialog import NetworkTransformerDialog
# analysis class
class TransformerAnalysis(QObject):
# initialise class with self and iface
def __init__(self, iface):
QObject.__init__(self)
self.iface=iface
# create the dialog object
self.dlg = NetworkTransformerDialog()
# setup signals with the transformation method
self.dlg.run_button.clicked.connect(self.run_method)
self.dlg.close_button.clicked.connect(self.close_method)
# prepare the dialog
def load_gui(self):
# put current layers into comboBox
self.dlg.update_layer(self.get_layers())
# show the dialog
self.dlg.show()
# Run the dialog event loop
result = self.dlg.exec_()
def unload_gui(self):
self.dlg.run_button.clicked.disconnect(self.run_method)
self.dlg.close_button.clicked.disconnect(self.close_method)
def get_layers(self):
layers = QgsMapLayerRegistry.instance().mapLayers().values()
layer_objects = []
for layer in layers:
if layer.type() == QgsMapLayer.VectorLayer and layer.geometryType() == QGis.Line:
layer_objects.append((layer.name(), layer))
return layer_objects
################################# run and close methods #############################
def run_method(self):
layer = self.dlg.get_layer()
transformation, value = self.dlg.get_transformation()
if transformation == 1:
self.rotate_line02(layer, value)
#self.close_method()
elif transformation == 2:
self.resize_line02(layer, value)
#self.close_method()
elif transformation == 3:
self.rescale_line02(layer, value)
#self.close_method()
# self.close_method()
def close_method(self):
self.dlg.close()
########################### transformation block ########################
# rotate_line_scripts
def rotate_line02(self,layer,value):
layer.startEditing()
layer.selectAll()
set_angle = value
for i in layer.selectedFeatures():
geom=i.geometry()
geom.rotate(set_angle,QgsPoint(geom.centroid().asPoint()))
layer.changeGeometry(i.id(),geom)
layer.updateExtents()
layer.reload()
layer.removeSelection()
# resize_line_scripts
def resize_line02(self,layer,value):
layer.startEditing()
layer.selectAll()
set_length=value
for i in layer.selectedFeatures():
geom=i.geometry()
pt=geom.asPolyline()
dy=pt[1][1] - pt[0][1]
dx=pt[1][0] - pt[0][0]
angle = math.atan2(dy,dx)
length=geom.length()
startx=geom.centroid().asPoint()[0]+((0.5*length*set_length/length)*math.cos(angle))
starty=geom.centroid().asPoint()[1]+((0.5*length*set_length/length)*math.sin(angle))
endx=geom.centroid().asPoint()[0]-((0.5*length*set_length/length)*math.cos(angle))
endy=geom.centroid().asPoint()[1]-((0.5*length*set_length/length)*math.sin(angle))
n_geom=QgsFeature()
n_geom.setGeometry(QgsGeometry.fromPolyline([QgsPoint(startx,starty),QgsPoint(endx,endy)]))
layer.changeGeometry(i.id(),n_geom.geometry())
layer.updateExtents()
layer.reload()
layer.removeSelection()
# rescale_line_scripts
def rescale_line02(self,layer,value):
layer.startEditing()
layer.selectAll()
set_scale=value
for i in layer.selectedFeatures():
geom=i.geometry()
pt=geom.asPolyline()
dy=pt[1][1] - pt[0][1]
dx=pt[1][0] - pt[0][0]
angle = math.atan2(dy,dx)
length=geom.length()
startx=geom.centroid().asPoint()[0]+((0.5*length*set_scale)*math.cos(angle))
starty=geom.centroid().asPoint()[1]+((0.5*length*set_scale)*math.sin(angle))
endx=geom.centroid().asPoint()[0]-((0.5*length*set_scale)*math.cos(angle))
endy=geom.centroid().asPoint()[1]-((0.5*length*set_scale)*math.sin(angle))
new_geom=QgsFeature()
new_geom.setGeometry(QgsGeometry.fromPolyline([QgsPoint(startx,starty),QgsPoint(endx,endy)]))
layer.changeGeometry(i.id(),new_geom.geometry())
layer.updateExtents()
layer.reload()
layer.removeSelection()