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func_calculator_class.py
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import sys, os
from qgis.core import *
from qgis.analysis import QgsRasterCalculator, QgsRasterCalculatorEntry
from PyQt5.QtCore import QStringListModel, pyqtSignal
from PyQt5.QtWidgets import QMainWindow, QFileDialog, QAbstractItemView, QMessageBox
from dataloader_dialog_base import Ui_MainWindow
class Func_calculator_class(QMainWindow, Ui_MainWindow):
mySignal = pyqtSignal(int)
def __init__(self, layers):
super(Func_calculator_class, self).__init__()
self.setupUi(self)
self.content = ""
self.slot_connect()
self.success = False
self.loadmap = False
self.show()
rasterList = []
for item in layers:
rasterList.append({"layer": item, "name": item.name()})
# 读取栅格信息
slm=QStringListModel()
self.totalEntities=rasterList
self.rasters=[]
self.rasterList=[]
for raster in rasterList:
self.rasters.append(raster['layer'])
for i in range(1, raster['layer'].bandCount()+1):
self.rasterList.append(raster['name']+'@'+str(i))
self.ref = []
slm.setStringList(self.rasterList)
self.listView.setModel(slm)
self.listView.doubleClicked.connect(self.action_choose_raster)
self.listView.setEditTriggers(QAbstractItemView.NoEditTriggers)
# 信号和槽的连接
def slot_connect(self):
# 按钮控件
self.b0.clicked.connect(lambda: self.action_add_content('0'))
self.b1.clicked.connect(lambda: self.action_add_content('1'))
self.b2.clicked.connect(lambda: self.action_add_content('2'))
self.b3.clicked.connect(lambda: self.action_add_content('3'))
self.b4.clicked.connect(lambda: self.action_add_content('4'))
self.b5.clicked.connect(lambda: self.action_add_content('5'))
self.b6.clicked.connect(lambda: self.action_add_content('6'))
self.b7.clicked.connect(lambda: self.action_add_content('7'))
self.b8.clicked.connect(lambda: self.action_add_content('8'))
self.b9.clicked.connect(lambda: self.action_add_content('9'))
self.bDot.clicked.connect(lambda: self.action_add_content('.'))
self.ClearB.clicked.connect(self.action_clear_content)
self.multiple.clicked.connect(lambda: self.action_add_content('*'))
self.divise.clicked.connect(lambda: self.action_add_content('/'))
self.add.clicked.connect(lambda: self.action_add_content('+'))
self.subtract.clicked.connect(lambda: self.action_add_content('-'))
self.isEqual.clicked.connect(lambda: self.action_add_content('='))
self.lowerB.clicked.connect(lambda: self.action_add_content('<'))
self.BiggerEqualB.clicked.connect(lambda: self.action_add_content('>='))
self.LOwerEqualB.clicked.connect(lambda: self.action_add_content('<='))
self.BiggerB.clicked.connect(lambda: self.action_add_content('>'))
self.isNotEqual.clicked.connect(lambda: self.action_add_content('!='))
self.absB.clicked.connect(lambda: self.action_add_content('ABS('))
self.powerB.clicked.connect(lambda: self.action_add_content('^'))
self.sqrtB.clicked.connect(lambda: self.action_add_content('sqrt('))
self.leftParen.clicked.connect(lambda: self.action_add_content('('))
self.rightParen.clicked.connect(lambda: self.action_add_content(')'))
self.sinB.clicked.connect(lambda: self.action_add_content('sin('))
self.cosB.clicked.connect(lambda: self.action_add_content('cos('))
self.tanB.clicked.connect(lambda: self.action_add_content('tan('))
self.asinB.clicked.connect(lambda: self.action_add_content('asin('))
self.acosB.clicked.connect(lambda: self.action_add_content('acos('))
self.atanB.clicked.connect(lambda: self.action_add_content('atan('))
self.lnB.clicked.connect(lambda: self.action_add_content('ln('))
self.logB.clicked.connect(lambda: self.action_add_content('log10('))
self.minB.clicked.connect(lambda: self.action_add_content('MIN('))
self.maxB.clicked.connect(lambda: self.action_add_content('MAX('))
# EditText控件
self.textEdit.textChanged.connect(self.action_changed_text)
# 执行控件
self.runButton.clicked.connect(self.action_run_calculator)
self.runButton.setEnabled(False)
# 选择路径
self.loadPath.clicked.connect(self.action_load_path)
self.lineEdit.setEnabled(False)
def action_add_content(self, n):
position = self.get_cursor()
if position == 0:
position = len(self.content)
temp = list(self.content)
temp.insert(position, n)
self.content = ''.join(temp)
self.textEdit.setText(self.content)
def action_clear_content(self):
self.content = ""
self.textEdit.setText(self.content)
def action_choose_raster(self, qModelIndex):
position = self.get_cursor()
if position == 0:
position = len(self.content)
raster = "\"" + self.rasterList[qModelIndex.row()] + "\""
temp = list(self.content)
temp.insert(position, raster)
self.content = ''.join(temp)
self.ref.append(self.rasterList[qModelIndex.row()])
self.textEdit.setText(self.content)
def action_changed_text(self):
self.content = self.textEdit.toPlainText()
def findRaster(self,index):
index=index.split('@')[0]
for item in self.totalEntities:
if item['name']==index:
return item['layer']
def action_run_calculator(self):
formula = self.content
print(formula)
rlayer = self.rasters[0]
entries=[]
width=[]
height=[]
for index in range(0,len(self.ref)):
entry = QgsRasterCalculatorEntry()
entry.ref = self.ref[index]
entry.bandNumber = 1
entry.raster = self.findRaster(entry.ref)
width.append(entry.raster.width())
height.append(entry.raster.height())
entries.append(entry)
calc = QgsRasterCalculator(formula, self.save_path, 'GTiff', rlayer.extent(), min(width), min(height), entries)
callback = calc.processCalculation()
self.return_info(callback)
def action_load_path(self):
file_choose, file_type = QFileDialog.getSaveFileName(self, "Raster Saving", "./processImage/", "Tiff Files (*.tif)")
self.save_path = file_choose
self.lineEdit.setText(self.save_path)
self.runButton.setEnabled(True)
def get_cursor(self):
tc = self.textEdit.textCursor()
return tc.position()
def return_info(self, msg):
if msg == 0:
QMessageBox.information(self, 'Callback', 'Success!', QMessageBox.Yes)
self.result = QgsRasterLayer(self.save_path, (self.save_path.split('/')[-1]).split('.')[0])
#os.remove(self.save_path)
self.success = True
self.loadmap = True
self.mySignal.emit(1)
self.close()
elif msg == 1:
QMessageBox.critical(self, 'Error', 'Create Output Error!', QMessageBox.Yes)
elif msg == 2:
QMessageBox.critical(self, 'Error', 'Input Layer Error!', QMessageBox.Yes)
elif msg == 3:
QMessageBox.warning(self, 'Warning', 'Canceled', QMessageBox.Yes)
elif msg == 4:
QMessageBox.critical(self, 'Error', 'Parser Error!', QMessageBox.Yes)
elif msg == 5:
QMessageBox.critical(self, 'Error', 'Memory Error!', QMessageBox.Yes)
elif msg == 6:
QMessageBox.critical(self, 'Error', 'Band Error!', QMessageBox.Yes)
elif msg == 7:
QMessageBox.critical(self, 'Error', 'Calculation Error!', QMessageBox.Yes)