forked from minorua/Qgis2threejs
/
propertyreader.py
230 lines (185 loc) · 7.96 KB
/
propertyreader.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
Qgis2threejs
A QGIS plugin
export terrain data, map canvas image and vector data to web browser
-------------------
begin : 2014-04-03
copyright : (C) 2014 Minoru Akagi
email : akaginch@gmail.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. *
* *
***************************************************************************/
"""
import random
from PyQt5.QtCore import QSize
from PyQt5.QtGui import QColor
from qgis.core import QgsExpression, QgsExpressionContext, QgsExpressionContextUtils
from .qgis2threejscore import calculateDEMSize
from .qgis2threejstools import logMessage
from .stylewidget import StyleWidget, HeightWidgetFunc, ColorWidgetFunc, OpacityWidgetFunc, OptionalColorWidgetFunc, ColorTextureWidgetFunc
colorNames = []
class DEMPropertyReader:
def __init__(self, layerId, properties=None):
properties = properties or {}
self.layerId = layerId
self.properties = properties
def demSize(self, canvasSize):
if self.layerId == "FLAT":
return QSize(2, 2)
sizeLevel = self.properties.get("horizontalSlider_DEMSize", 2)
roughening = 0
if self.properties.get("checkBox_Surroundings", False):
roughening = self.properties.get("spinBox_Roughening", 0)
return calculateDEMSize(canvasSize, sizeLevel, roughening)
class VectorPropertyReader:
def __init__(self, objectTypeManager, renderContext, layer, properties):
assert(properties is not None)
self.renderContext = renderContext
self.expressionContext = QgsExpressionContext()
self.expressionContext.appendScope(QgsExpressionContextUtils.layerScope(layer))
self.layer = layer
properties = properties or {}
self.properties = properties
if properties:
self.objType = objectTypeManager.objectType(layer.geometryType(), properties["comboBox_ObjectType"])
self.visible = properties.get("visible", True)
else:
self.visible = False
self._exprs = {}
self.exprAlt = QgsExpression(properties.get("fieldExpressionWidget_altitude") or "0")
self.exprLabel = QgsExpression(properties.get("labelHeightWidget", {}).get("editText") or "0")
def evaluateExpression(self, expr_str, f):
if expr_str not in self._exprs:
self._exprs[expr_str] = QgsExpression(expr_str)
self.expressionContext.setFeature(f)
return self._exprs[expr_str].evaluate(self.expressionContext)
def readFillColor(self, vals, f):
return self._readColor(vals, f)
def readBorderColor(self, vals, f):
return self._readColor(vals, f, isBorder=True)
# read color from COLOR or OPTIONAL_COLOR widget
def _readColor(self, widgetValues, f, isBorder=False):
global colorNames
mode = widgetValues["comboData"]
if mode == OptionalColorWidgetFunc.NONE:
return None
if mode == ColorWidgetFunc.EXPRESSION:
return self.evaluateExpression(widgetValues["editText"], f)
if mode == ColorWidgetFunc.RANDOM or f is None:
if len(colorNames) == 0:
colorNames = QColor.colorNames()
colorName = random.choice(colorNames)
colorNames.remove(colorName)
return QColor(colorName).name().replace("#", "0x")
# feature color
symbol = self.layer.renderer().symbolForFeature(f, self.renderContext)
if symbol is None:
logMessage('Symbol for feature cannot be found: {0}'.format(self.layer.name()))
symbol = self.layer.renderer().symbols()[0]
else:
sl = symbol.symbolLayer(0)
if sl and isBorder:
return sl.strokeColor().name().replace("#", "0x")
if sl and symbol.hasDataDefinedProperties():
expr = sl.dataDefinedProperty("color") #TODO: [QGIS 3]
if expr:
# data defined color
rgb = expr.evaluate(f, f.fields())
# "rrr,ggg,bbb" (dec) to "0xRRGGBB" (hex)
r, g, b = [max(0, min(int(c), 255)) for c in rgb.split(",")[:3]]
return "0x{0:02x}{1:02x}{2:02x}".format(r, g, b)
return symbol.color().name().replace("#", "0x")
def readOpacity(self, widgetValues, f):
vals = widgetValues
if vals["comboData"] == OpacityWidgetFunc.EXPRESSION:
try:
val = self.evaluateExpression(widgetValues["editText"], f)
return min(max(0, val), 100) / 100
except ValueError:
return 1
alpha = None
symbol = self.layer.renderer().symbolForFeature(f, self.renderContext)
if symbol is None:
logMessage('Symbol for feature cannot be found: {0}'.format(self.layer.name()))
symbol = self.layer.renderer().symbols()[0]
else:
sl = symbol.symbolLayer(0)
if sl and symbol.hasDataDefinedProperties():
expr = sl.dataDefinedProperty("color") #TODO: [QGIS 3]
if expr:
# data defined opacity
cs_rgba = expr.evaluate(f, f.fields())
rgba = cs_rgba.split(",")
if len(rgba) == 4:
alpha = rgba[3] / 255
if alpha is None:
alpha = 1 #TODO: [QGIS 3] symbol.alpha()
# 'QgsMarkerSymbol' object has no attribute 'alpha'
return self.layer.opacity() * alpha # opacity = layer_opacity * feature_opacity
@classmethod
def toFloat(cls, val):
try:
return float(val)
except Exception as e:
logMessage('{0} (value: {1})'.format(e.message, str(val)))
return 0
# functions to read values from height widget (z coordinate)
def useZ(self):
return self.properties.get("radioButton_zValue", False)
def useM(self):
return self.properties.get("radioButton_mValue", False)
def isHeightRelativeToDEM(self):
return self.properties.get("comboBox_altitudeMode") is not None
def altitude(self):
return float(self.exprAlt.evaluate(self.expressionContext) or 0)
def labelHeight(self):
return float(self.exprLabel.evaluate(self.expressionContext) or 0)
def setContextFeature(self, f):
self.expressionContext.setFeature(f)
# read values from style widgets
def values(self, f):
assert(f is not None)
vals = []
for i in range(16): # big number for style count
p = "styleWidget" + str(i)
if p not in self.properties:
break
widgetValues = self.properties[p]
if len(widgetValues) == 0:
break
widgetType = widgetValues["type"]
comboData = widgetValues.get("comboData")
if widgetType == StyleWidget.COLOR:
vals.append(self.readFillColor(widgetValues, f))
elif widgetType == StyleWidget.OPTIONAL_COLOR:
vals.append(self.readBorderColor(widgetValues, f))
elif widgetType == StyleWidget.COLOR_TEXTURE:
if comboData == ColorTextureWidgetFunc.MAP_CANVAS:
vals.append(comboData)
elif comboData == ColorTextureWidgetFunc.LAYER:
vals.append(widgetValues.get("layerIds", []))
else:
vals.append(self.readFillColor(widgetValues, f))
elif widgetType == StyleWidget.OPACITY:
vals.append(self.readOpacity(widgetValues, f))
elif widgetType == StyleWidget.CHECKBOX:
vals.append(widgetValues["checkBox"])
else:
expr = widgetValues["editText"]
val = self.evaluateExpression(expr, f)
if val is None:
logMessage("Failed to evaluate expression: " + expr)
if widgetType == StyleWidget.FILEPATH:
val = ""
else:
val = 0
vals.append(val)
return vals