mirror of
https://github.com/qgis/QGIS.git
synced 2025-11-04 00:04:25 -05:00
287 lines
11 KiB
Python
Executable File
287 lines
11 KiB
Python
Executable File
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
NumberInputPanel.py
|
|
---------------------
|
|
Date : August 2012
|
|
Copyright : (C) 2012 by Victor Olaya
|
|
Email : volayaf 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__ = 'Victor Olaya'
|
|
__date__ = 'August 2012'
|
|
__copyright__ = '(C) 2012, Victor Olaya'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
import os
|
|
import math
|
|
import sip
|
|
|
|
from qgis.PyQt import uic
|
|
from qgis.PyQt.QtCore import pyqtSignal, QSize
|
|
from qgis.PyQt.QtWidgets import QDialog, QLabel
|
|
|
|
from qgis.core import (QgsApplication,
|
|
QgsExpression,
|
|
QgsProperty,
|
|
QgsUnitTypes,
|
|
QgsMapLayer,
|
|
QgsCoordinateReferenceSystem,
|
|
QgsProcessingParameterNumber,
|
|
QgsProcessingOutputNumber,
|
|
QgsProcessingParameterDefinition,
|
|
QgsProcessingModelChildParameterSource,
|
|
QgsProcessingFeatureSourceDefinition,
|
|
QgsProcessingUtils)
|
|
from qgis.gui import QgsExpressionBuilderDialog
|
|
from processing.tools.dataobjects import createExpressionContext, createContext
|
|
|
|
pluginPath = os.path.split(os.path.dirname(__file__))[0]
|
|
NUMBER_WIDGET, NUMBER_BASE = uic.loadUiType(
|
|
os.path.join(pluginPath, 'ui', 'widgetNumberSelector.ui'))
|
|
WIDGET, BASE = uic.loadUiType(
|
|
os.path.join(pluginPath, 'ui', 'widgetBaseSelector.ui'))
|
|
|
|
|
|
class ModelerNumberInputPanel(BASE, WIDGET):
|
|
|
|
"""
|
|
Number input panel for use inside the modeler - this input panel
|
|
is based off the base input panel and includes a text based line input
|
|
for entering values. This allows expressions and other non-numeric
|
|
values to be set, which are later evalauted to numbers when the model
|
|
is run.
|
|
"""
|
|
|
|
hasChanged = pyqtSignal()
|
|
|
|
def __init__(self, param, modelParametersDialog):
|
|
super().__init__(None)
|
|
self.setupUi(self)
|
|
|
|
self.param = param
|
|
self.modelParametersDialog = modelParametersDialog
|
|
if param.defaultValue():
|
|
self.setValue(param.defaultValue())
|
|
self.btnSelect.clicked.connect(self.showExpressionsBuilder)
|
|
self.leText.textChanged.connect(lambda: self.hasChanged.emit())
|
|
|
|
def showExpressionsBuilder(self):
|
|
context = createExpressionContext()
|
|
processing_context = createContext()
|
|
scope = self.modelParametersDialog.model.createExpressionContextScopeForChildAlgorithm(self.modelParametersDialog.childId, processing_context)
|
|
context.appendScope(scope)
|
|
|
|
highlighted = scope.variableNames()
|
|
context.setHighlightedVariables(highlighted)
|
|
|
|
dlg = QgsExpressionBuilderDialog(None, str(self.leText.text()), self, 'generic', context)
|
|
|
|
dlg.setWindowTitle(self.tr('Expression Based Input'))
|
|
if dlg.exec_() == QDialog.Accepted:
|
|
exp = QgsExpression(dlg.expressionText())
|
|
if not exp.hasParserError():
|
|
self.setValue(dlg.expressionText())
|
|
|
|
def getValue(self):
|
|
value = self.leText.text()
|
|
for param in self.modelParametersDialog.model.parameterDefinitions():
|
|
if isinstance(param, QgsProcessingParameterNumber):
|
|
if "@" + param.name() == value.strip():
|
|
return QgsProcessingModelChildParameterSource.fromModelParameter(param.name())
|
|
|
|
for alg in list(self.modelParametersDialog.model.childAlgorithms().values()):
|
|
for out in alg.algorithm().outputDefinitions():
|
|
if isinstance(out, QgsProcessingOutputNumber) and "@%s_%s" % (alg.childId(), out.name()) == value.strip():
|
|
return QgsProcessingModelChildParameterSource.fromChildOutput(alg.childId(), out.outputName())
|
|
|
|
try:
|
|
return float(value.strip())
|
|
except:
|
|
return QgsProcessingModelChildParameterSource.fromExpression(self.leText.text())
|
|
|
|
def setValue(self, value):
|
|
if isinstance(value, QgsProcessingModelChildParameterSource):
|
|
if value.source() == QgsProcessingModelChildParameterSource.ModelParameter:
|
|
self.leText.setText('@' + value.parameterName())
|
|
elif value.source() == QgsProcessingModelChildParameterSource.ChildOutput:
|
|
name = "%s_%s" % (value.outputChildId(), value.outputName())
|
|
self.leText.setText(name)
|
|
elif value.source() == QgsProcessingModelChildParameterSource.Expression:
|
|
self.leText.setText(value.expression())
|
|
else:
|
|
self.leText.setText(str(value.staticValue()))
|
|
else:
|
|
self.leText.setText(str(value))
|
|
|
|
|
|
class NumberInputPanel(NUMBER_BASE, NUMBER_WIDGET):
|
|
|
|
"""
|
|
Number input panel for use outside the modeler - this input panel
|
|
contains a user friendly spin box for entering values.
|
|
"""
|
|
|
|
hasChanged = pyqtSignal()
|
|
|
|
def __init__(self, param):
|
|
super(NumberInputPanel, self).__init__(None)
|
|
self.setupUi(self)
|
|
|
|
self.spnValue.setExpressionsEnabled(True)
|
|
|
|
self.param = param
|
|
if self.param.dataType() == QgsProcessingParameterNumber.Integer:
|
|
self.spnValue.setDecimals(0)
|
|
else:
|
|
# Guess reasonable step value
|
|
if self.param.maximum() is not None and self.param.minimum() is not None:
|
|
try:
|
|
self.spnValue.setSingleStep(self.calculateStep(float(self.param.minimum()), float(self.param.maximum())))
|
|
except:
|
|
pass
|
|
|
|
if self.param.maximum() is not None:
|
|
self.spnValue.setMaximum(self.param.maximum())
|
|
else:
|
|
self.spnValue.setMaximum(999999999)
|
|
if self.param.minimum() is not None:
|
|
self.spnValue.setMinimum(self.param.minimum())
|
|
else:
|
|
self.spnValue.setMinimum(-999999999)
|
|
|
|
self.allowing_null = False
|
|
# set default value
|
|
if param.flags() & QgsProcessingParameterDefinition.FlagOptional:
|
|
self.spnValue.setShowClearButton(True)
|
|
min = self.spnValue.minimum() - 1
|
|
self.spnValue.setMinimum(min)
|
|
self.spnValue.setValue(min)
|
|
self.spnValue.setSpecialValueText(self.tr('Not set'))
|
|
self.allowing_null = True
|
|
|
|
if param.defaultValue() is not None:
|
|
self.setValue(param.defaultValue())
|
|
if not self.allowing_null:
|
|
try:
|
|
self.spnValue.setClearValue(float(param.defaultValue()))
|
|
except:
|
|
pass
|
|
elif self.param.minimum() is not None:
|
|
try:
|
|
self.setValue(float(self.param.minimum()))
|
|
if not self.allowing_null:
|
|
self.spnValue.setClearValue(float(self.param.minimum()))
|
|
except:
|
|
pass
|
|
elif not self.allowing_null:
|
|
self.setValue(0)
|
|
self.spnValue.setClearValue(0)
|
|
|
|
# we don't show the expression button outside of modeler
|
|
self.layout().removeWidget(self.btnSelect)
|
|
sip.delete(self.btnSelect)
|
|
self.btnSelect = None
|
|
|
|
if not self.param.isDynamic():
|
|
# only show data defined button for dynamic properties
|
|
self.layout().removeWidget(self.btnDataDefined)
|
|
sip.delete(self.btnDataDefined)
|
|
self.btnDataDefined = None
|
|
else:
|
|
self.btnDataDefined.init(0, QgsProperty(), self.param.dynamicPropertyDefinition())
|
|
self.btnDataDefined.registerEnabledWidget(self.spnValue, False)
|
|
|
|
self.spnValue.valueChanged.connect(lambda: self.hasChanged.emit())
|
|
|
|
def setDynamicLayer(self, layer):
|
|
try:
|
|
self.btnDataDefined.setVectorLayer(self.getLayerFromValue(layer))
|
|
except:
|
|
pass
|
|
|
|
def getLayerFromValue(self, value):
|
|
context = createContext()
|
|
if isinstance(value, QgsProcessingFeatureSourceDefinition):
|
|
value, ok = value.source.valueAsString(context.expressionContext())
|
|
if isinstance(value, str):
|
|
value = QgsProcessingUtils.mapLayerFromString(value, context)
|
|
return value
|
|
|
|
def getValue(self):
|
|
if self.btnDataDefined is not None and self.btnDataDefined.isActive():
|
|
return self.btnDataDefined.toProperty()
|
|
elif self.allowing_null and self.spnValue.value() == self.spnValue.minimum():
|
|
return None
|
|
else:
|
|
return self.spnValue.value()
|
|
|
|
def setValue(self, value):
|
|
try:
|
|
self.spnValue.setValue(float(value))
|
|
except:
|
|
return
|
|
|
|
def calculateStep(self, minimum, maximum):
|
|
value_range = maximum - minimum
|
|
if value_range <= 1.0:
|
|
step = value_range / 10.0
|
|
# round to 1 significant figrue
|
|
return round(step, -int(math.floor(math.log10(step))))
|
|
else:
|
|
return 1.0
|
|
|
|
|
|
class DistanceInputPanel(NumberInputPanel):
|
|
|
|
"""
|
|
Distance input panel for use outside the modeler - this input panel
|
|
contains a label showing the distance unit.
|
|
"""
|
|
|
|
def __init__(self, param):
|
|
super().__init__(param)
|
|
|
|
self.label = QLabel('')
|
|
label_margin = self.fontMetrics().width('X')
|
|
self.layout().insertSpacing(1, label_margin / 2)
|
|
self.layout().insertWidget(2, self.label)
|
|
self.layout().insertSpacing(3, label_margin / 2)
|
|
self.warning_label = QLabel()
|
|
icon = QgsApplication.getThemeIcon('mIconWarning.svg')
|
|
size = max(24, self.spnValue.height() * 0.5)
|
|
self.warning_label.setPixmap(icon.pixmap(icon.actualSize(QSize(size, size))))
|
|
self.warning_label.setToolTip(self.tr('Distance is in geographic degrees. Consider reprojecting to a projected local coordinate system for accurate results.'))
|
|
self.layout().insertWidget(4, self.warning_label)
|
|
self.layout().insertSpacing(5, label_margin)
|
|
self.setUnits(QgsUnitTypes.DistanceUnknownUnit)
|
|
|
|
def setUnits(self, units):
|
|
self.label.setText(QgsUnitTypes.toString(units))
|
|
self.warning_label.setVisible(units == QgsUnitTypes.DistanceDegrees)
|
|
|
|
def setUnitParameterValue(self, value):
|
|
units = QgsUnitTypes.DistanceUnknownUnit
|
|
layer = self.getLayerFromValue(value)
|
|
if isinstance(layer, QgsMapLayer):
|
|
units = layer.crs().mapUnits()
|
|
elif isinstance(value, QgsCoordinateReferenceSystem):
|
|
units = value.mapUnits()
|
|
elif isinstance(value, str):
|
|
crs = QgsCoordinateReferenceSystem(value)
|
|
if crs.isValid():
|
|
units = crs.mapUnits()
|
|
self.setUnits(units)
|