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InterpolationWidgets.py
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InterpolationWidgets.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
InterpolationDataWidget.py
---------------------
Date : December 2016
Copyright : (C) 2016 by Alexander Bruy
Email : alexander dot bruy 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. *
* *
***************************************************************************
"""
__author__ = 'Alexander Bruy'
__date__ = 'December 2016'
__copyright__ = '(C) 2016, Alexander Bruy'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import os
from qgis.PyQt import uic
from qgis.PyQt.QtCore import pyqtSignal
from qgis.PyQt.QtWidgets import (QTreeWidgetItem,
QComboBox)
from qgis.core import (QgsApplication,
QgsMapLayerProxyModel,
QgsWkbTypes,
QgsRectangle,
QgsReferencedRectangle,
QgsCoordinateReferenceSystem,
QgsProcessingUtils,
QgsProcessingParameterNumber,
QgsProcessingParameterDefinition,
QgsFieldProxyModel)
from qgis.gui import QgsDoubleSpinBox
from qgis.analysis import QgsInterpolator
from processing.gui.wrappers import WidgetWrapper, DIALOG_STANDARD
from processing.tools import dataobjects
pluginPath = os.path.dirname(__file__)
class ParameterInterpolationData(QgsProcessingParameterDefinition):
def __init__(self, name='', description=''):
super().__init__(name, description)
self.setMetadata({
'widget_wrapper': 'processing.algs.qgis.ui.InterpolationWidgets.InterpolationDataWidgetWrapper'
})
def type(self):
return 'idw_interpolation_data'
def clone(self):
return ParameterInterpolationData(self.name(), self.description())
@staticmethod
def parseValue(value):
if value is None:
return None
if value == '':
return None
if isinstance(value, str):
return value if value != '' else None
else:
return ParameterInterpolationData.dataToString(value)
@staticmethod
def dataToString(data):
s = ''
for c in data:
s += '{}::~::{}::~::{:d}::~::{:d};'.format(c[0],
c[1],
c[2],
c[3])
return s[:-1]
WIDGET, BASE = uic.loadUiType(os.path.join(pluginPath, 'interpolationdatawidgetbase.ui'))
class InterpolationDataWidget(BASE, WIDGET):
hasChanged = pyqtSignal()
def __init__(self):
super(InterpolationDataWidget, self).__init__(None)
self.setupUi(self)
self.btnAdd.setIcon(QgsApplication.getThemeIcon('/symbologyAdd.svg'))
self.btnRemove.setIcon(QgsApplication.getThemeIcon('/symbologyRemove.svg'))
self.btnAdd.clicked.connect(self.addLayer)
self.btnRemove.clicked.connect(self.removeLayer)
self.cmbLayers.layerChanged.connect(self.layerChanged)
self.cmbLayers.setFilters(QgsMapLayerProxyModel.VectorLayer)
self.cmbFields.setFilters(QgsFieldProxyModel.Numeric)
self.cmbFields.setLayer(self.cmbLayers.currentLayer())
def addLayer(self):
layer = self.cmbLayers.currentLayer()
attribute = ''
if self.chkUseZCoordinate.isChecked():
attribute = 'Z_COORD'
else:
attribute = self.cmbFields.currentField()
self._addLayerData(layer.name(), attribute)
self.hasChanged.emit()
def removeLayer(self):
item = self.layersTree.currentItem()
if not item:
return
self.layersTree.invisibleRootItem().removeChild(item)
self.hasChanged.emit()
def layerChanged(self, layer):
self.chkUseZCoordinate.setEnabled(False)
self.chkUseZCoordinate.setChecked(False)
if layer is None or not layer.isValid():
return
provider = layer.dataProvider()
if not provider:
return
if QgsWkbTypes.hasZ(provider.wkbType()):
self.chkUseZCoordinate.setEnabled(True)
self.cmbFields.setLayer(layer)
def _addLayerData(self, layerName, attribute):
item = QTreeWidgetItem()
item.setText(0, layerName)
item.setText(1, attribute)
self.layersTree.addTopLevelItem(item)
comboBox = QComboBox()
comboBox.addItem(self.tr('Points'))
comboBox.addItem(self.tr('Structure lines'))
comboBox.addItem(self.tr('Break lines'))
comboBox.setCurrentIndex(0)
self.layersTree.setItemWidget(item, 2, comboBox)
def setValue(self, value):
self.layersTree.clear()
rows = value.split(';')
for i, r in enumerate(rows):
v = r.split('::~::')
self.addLayerData(v[0], v[1])
comboBox = self.layersTree.itemWidget(self.layersTree.topLevelItem(i), 2)
comboBox.setCurrentIndex(comboBox.findText(v[3]))
self.hasChanged.emit()
def value(self):
layers = ''
context = dataobjects.createContext()
for i in range(self.layersTree.topLevelItemCount()):
item = self.layersTree.topLevelItem(i)
if item:
layerName = item.text(0)
layer = QgsProcessingUtils.mapLayerFromString(layerName, context)
if not layer:
continue
provider = layer.dataProvider()
if not provider:
continue
interpolationAttribute = item.text(1)
interpolationSource = QgsInterpolator.ValueAttribute
if interpolationAttribute == 'Z_COORD':
interpolationSource = QgsInterpolator.ValueZ
fieldIndex = -1
else:
fieldIndex = layer.fields().indexFromName(interpolationAttribute)
comboBox = self.layersTree.itemWidget(self.layersTree.topLevelItem(i), 2)
inputTypeName = comboBox.currentText()
if inputTypeName == self.tr('Points'):
inputType = QgsInterpolator.SourcePoints
elif inputTypeName == self.tr('Structure lines'):
inputType = QgsInterpolator.SourceStructureLines
else:
inputType = QgsInterpolator.SourceBreakLines
layers += '{}::~::{:d}::~::{:d}::~::{:d}::|::'.format(layer.source(),
interpolationSource,
fieldIndex,
inputType)
return layers[:-len('::|::')]
class InterpolationDataWidgetWrapper(WidgetWrapper):
def createWidget(self):
widget = InterpolationDataWidget()
widget.hasChanged.connect(lambda: self.widgetValueHasChanged.emit(self))
return widget
def setValue(self, value):
self.widget.setValue(value)
def value(self):
return self.widget.value()
class ParameterPixelSize(QgsProcessingParameterNumber):
def __init__(self, name='', description='', layersData=None, extent=None, minValue=None, default=None, optional=False):
QgsProcessingParameterNumber.__init__(self, name, description, QgsProcessingParameterNumber.Double, default, optional, minValue)
self.setMetadata({
'widget_wrapper': 'processing.algs.qgis.ui.InterpolationWidgets.PixelSizeWidgetWrapper'
})
self.layersData = layersData
self.extent = extent
self.layers = []
def clone(self):
copy = ParameterPixelSize(self.name(), self.description(), self.layersData, self.extent, self.minimum(), self.defaultValue(), self.flags() & QgsProcessingParameterDefinition.FlagOptional)
return copy
WIDGET, BASE = uic.loadUiType(os.path.join(pluginPath, 'RasterResolutionWidget.ui'))
class PixelSizeWidget(BASE, WIDGET):
def __init__(self):
super(PixelSizeWidget, self).__init__(None)
self.setupUi(self)
self.context = dataobjects.createContext()
self.extent = QgsRectangle()
self.layers = []
self.mCellXSpinBox.setShowClearButton(False)
self.mCellYSpinBox.setShowClearButton(False)
self.mRowsSpinBox.setShowClearButton(False)
self.mColumnsSpinBox.setShowClearButton(False)
self.mCellYSpinBox.valueChanged.connect(self.mCellXSpinBox.setValue)
self.mCellXSpinBox.valueChanged.connect(self.pixelSizeChanged)
self.mRowsSpinBox.valueChanged.connect(self.rowsChanged)
self.mColumnsSpinBox.valueChanged.connect(self.columnsChanged)
def setLayers(self, layersData):
self.extent = QgsRectangle()
self.layers = []
for row in layersData.split(';'):
v = row.split('::~::')
# need to keep a reference until interpolation is complete
layer = QgsProcessingUtils.variantToSource(v[0], self.context)
if layer:
self.layers.append(layer)
bbox = layer.sourceExtent()
if self.extent.isEmpty():
self.extent = bbox
else:
self.extent.combineExtentWith(bbox)
self.pixelSizeChanged()
def setExtent(self, extent):
if extent is not None:
tokens = extent.split(' ')[0].split(',')
ext = QgsRectangle(float(tokens[0]), float(tokens[2]), float(tokens[1]), float(tokens[3]))
if len(tokens) > 1:
self.extent = QgsReferencedRectangle(ext, QgsCoordinateReferenceSystem(tokens[1][1:-1]))
else:
self.extent = ext
self.pixelSizeChanged()
def pixelSizeChanged(self):
cell_size = self.mCellXSpinBox.value()
if cell_size <= 0:
return
self.mCellYSpinBox.blockSignals(True)
self.mCellYSpinBox.setValue(cell_size)
self.mCellYSpinBox.blockSignals(False)
rows = max(round(self.extent.height() / cell_size) + 1, 1)
cols = max(round(self.extent.width() / cell_size) + 1, 1)
self.mRowsSpinBox.blockSignals(True)
self.mRowsSpinBox.setValue(rows)
self.mRowsSpinBox.blockSignals(False)
self.mColumnsSpinBox.blockSignals(True)
self.mColumnsSpinBox.setValue(cols)
self.mColumnsSpinBox.blockSignals(False)
def rowsChanged(self):
rows = self.mRowsSpinBox.value()
if rows <= 0:
return
cell_size = self.extent.height() / rows
cols = max(round(self.extent.width() / cell_size) + 1, 1)
self.mColumnsSpinBox.blockSignals(True)
self.mColumnsSpinBox.setValue(cols)
self.mColumnsSpinBox.blockSignals(False)
for w in [self.mCellXSpinBox, self.mCellYSpinBox]:
w.blockSignals(True)
w.setValue(cell_size)
w.blockSignals(False)
def columnsChanged(self):
cols = self.mColumnsSpinBox.value()
if cols < 2:
return
cell_size = self.extent.width() / (cols - 1)
rows = max(round(self.extent.height() / cell_size), 1)
self.mRowsSpinBox.blockSignals(True)
self.mRowsSpinBox.setValue(rows)
self.mRowsSpinBox.blockSignals(False)
for w in [self.mCellXSpinBox, self.mCellYSpinBox]:
w.blockSignals(True)
w.setValue(cell_size)
w.blockSignals(False)
def setValue(self, value):
try:
numeric_value = float(value)
except:
return False
self.mCellXSpinBox.setValue(numeric_value)
self.mCellYSpinBox.setValue(numeric_value)
return True
def value(self):
return self.mCellXSpinBox.value()
class PixelSizeWidgetWrapper(WidgetWrapper):
def __init__(self, param, dialog, row=0, col=0, **kwargs):
super().__init__(param, dialog, row, col, **kwargs)
self.context = dataobjects.createContext()
def _panel(self):
return PixelSizeWidget()
def createWidget(self):
if self.dialogType == DIALOG_STANDARD:
return self._panel()
else:
w = QgsDoubleSpinBox()
w.setShowClearButton(False)
w.setMinimum(0)
w.setMaximum(99999999999)
w.setDecimals(6)
w.setToolTip(self.tr('Resolution of each pixel in output raster, in layer units'))
return w
def postInitialize(self, wrappers):
if self.dialogType != DIALOG_STANDARD:
return
for wrapper in wrappers:
if wrapper.parameterDefinition().name() == self.param.layersData:
self.setLayers(wrapper.parameterValue())
wrapper.widgetValueHasChanged.connect(self.layersChanged)
elif wrapper.parameterDefinition().name() == self.param.extent:
self.setExtent(wrapper.parameterValue())
wrapper.widgetValueHasChanged.connect(self.extentChanged)
def layersChanged(self, wrapper):
self.setLayers(wrapper.parameterValue())
def setLayers(self, layersData):
self.widget.setLayers(layersData)
def extentChanged(self, wrapper):
self.setExtent(wrapper.parameterValue())
def setExtent(self, extent):
self.widget.setExtent(extent)
def setValue(self, value):
return self.widget.setValue(value)
def value(self):
return self.widget.value()