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https://github.com/qgis/QGIS.git
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377b181c4e
Also - simplify and add tests - remove large memory leak (persistant store of all non-project layers) - remove broken support for direct loading postgres/virtual layers by string (Python version was very broken and would never match a postgres/virtual layer)
214 lines
7.3 KiB
Python
214 lines
7.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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Heatmap.py
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---------------------
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Date : December 2016
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Copyright : (C) 2016 by Nyall Dawson
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Email : nyall dot dawson at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Nyall Dawson'
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__date__ = 'December 2016'
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__copyright__ = '(C) 2016, Nyall Dawson'
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from processing.gui.wrappers import WidgetWrapper, DIALOG_STANDARD
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from processing.tools import dataobjects
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from processing.core.parameters import _resolveLayers
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import os
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from qgis.PyQt import uic
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from qgis.gui import QgsDoubleSpinBox
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from qgis.core import QgsRectangle
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pluginPath = os.path.dirname(__file__)
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WIDGET, BASE = uic.loadUiType(
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os.path.join(pluginPath, 'RasterResolutionWidget.ui'))
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class HeatmapPixelSizeWidget(BASE, WIDGET):
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def __init__(self):
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super(HeatmapPixelSizeWidget, self).__init__(None)
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self.setupUi(self)
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self.layer_bounds = QgsRectangle()
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self.layer = None
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self.raster_bounds = QgsRectangle()
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self.radius = 100
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self.radius_field = None
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self.mCellXSpinBox.setShowClearButton(False)
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self.mCellYSpinBox.setShowClearButton(False)
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self.mRowsSpinBox.setShowClearButton(False)
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self.mColumnsSpinBox.setShowClearButton(False)
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self.mCellYSpinBox.valueChanged.connect(self.mCellXSpinBox.setValue)
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self.mCellXSpinBox.valueChanged.connect(self.pixelSizeChanged)
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self.mRowsSpinBox.valueChanged.connect(self.rowsChanged)
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self.mColumnsSpinBox.valueChanged.connect(self.columnsChanged)
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def setRadius(self, radius):
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self.radius = radius
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self.recalculate_bounds()
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def setRadiusField(self, radius_field):
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self.radius_field = radius_field
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self.recalculate_bounds()
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def setLayer(self, layer):
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if not layer:
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return
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bounds = layer.extent()
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if bounds.isNull():
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return
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self.layer = layer
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self.layer_bounds = bounds
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self.recalculate_bounds()
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def recalculate_bounds(self):
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self.raster_bounds = QgsRectangle(self.layer_bounds)
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if not self.layer:
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return
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max_radius = self.radius
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if self.radius_field:
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idx = self.layer.fields().lookupField(self.radius_field)
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try:
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max_radius = float(self.layer.maximumValue(idx))
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except:
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pass
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self.raster_bounds.setXMinimum(self.raster_bounds.xMinimum() - max_radius)
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self.raster_bounds.setYMinimum(self.raster_bounds.yMinimum() - max_radius)
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self.raster_bounds.setXMaximum(self.raster_bounds.xMaximum() + max_radius)
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self.raster_bounds.setYMaximum(self.raster_bounds.yMaximum() + max_radius)
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self.pixelSizeChanged()
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def pixelSizeChanged(self):
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cell_size = self.mCellXSpinBox.value()
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if cell_size <= 0:
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return
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self.mCellYSpinBox.blockSignals(True)
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self.mCellYSpinBox.setValue(cell_size)
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self.mCellYSpinBox.blockSignals(False)
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rows = max(round(self.raster_bounds.height() / cell_size) + 1, 1)
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cols = max(round(self.raster_bounds.width() / cell_size) + 1, 1)
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self.mRowsSpinBox.blockSignals(True)
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self.mRowsSpinBox.setValue(rows)
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self.mRowsSpinBox.blockSignals(False)
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self.mColumnsSpinBox.blockSignals(True)
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self.mColumnsSpinBox.setValue(cols)
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self.mColumnsSpinBox.blockSignals(False)
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def rowsChanged(self):
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rows = self.mRowsSpinBox.value()
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if rows <= 0:
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return
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cell_size = self.raster_bounds.height() / rows
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cols = max(round(self.raster_bounds.width() / cell_size) + 1, 1)
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self.mColumnsSpinBox.blockSignals(True)
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self.mColumnsSpinBox.setValue(cols)
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self.mColumnsSpinBox.blockSignals(False)
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for w in [self.mCellXSpinBox, self.mCellYSpinBox]:
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w.blockSignals(True)
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w.setValue(cell_size)
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w.blockSignals(False)
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def columnsChanged(self):
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cols = self.mColumnsSpinBox.value()
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if cols < 2:
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return
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cell_size = self.raster_bounds.width() / (cols - 1)
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rows = max(round(self.raster_bounds.height() / cell_size), 1)
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self.mRowsSpinBox.blockSignals(True)
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self.mRowsSpinBox.setValue(rows)
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self.mRowsSpinBox.blockSignals(False)
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for w in [self.mCellXSpinBox, self.mCellYSpinBox]:
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w.blockSignals(True)
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w.setValue(cell_size)
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w.blockSignals(False)
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def setValue(self, value):
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try:
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numeric_value = float(value)
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except:
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return False
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self.mCellXSpinBox.setValue(numeric_value)
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self.mCellYSpinBox.setValue(numeric_value)
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return True
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def value(self):
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return self.mCellXSpinBox.value()
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class HeatmapPixelSizeWidgetWrapper(WidgetWrapper):
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def _panel(self):
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return HeatmapPixelSizeWidget()
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def createWidget(self):
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if self.dialogType == DIALOG_STANDARD:
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return self._panel()
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else:
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w = QgsDoubleSpinBox()
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w.setShowClearButton(False)
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w.setMinimum(0)
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w.setMaximum(99999999999)
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w.setDecimals(6)
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w.setToolTip(self.tr('Resolution of each pixel in output raster, in layer units'))
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return w
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def postInitialize(self, wrappers):
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if self.dialogType != DIALOG_STANDARD:
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return
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for wrapper in wrappers:
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if wrapper.param.name == self.param.parent_layer:
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self.setLayer(wrapper.value())
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wrapper.widgetValueHasChanged.connect(self.parentLayerChanged)
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elif wrapper.param.name == self.param.radius_param:
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self.setRadius(wrapper.value())
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wrapper.widgetValueHasChanged.connect(self.radiusChanged)
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elif wrapper.param.name == self.param.radius_field_param:
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self.setLayer(wrapper.value())
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wrapper.widgetValueHasChanged.connect(self.radiusFieldChanged)
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def parentLayerChanged(self, wrapper):
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self.setLayer(wrapper.value())
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def setLayer(self, layer):
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if isinstance(layer, str):
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layer = dataobjects.getLayerFromString(_resolveLayers(layer))
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self.widget.setLayer(layer)
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def radiusChanged(self, wrapper):
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self.setRadius(wrapper.value())
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def setRadius(self, radius):
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self.widget.setRadius(radius)
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def radiusFieldChanged(self, wrapper):
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self.setRadiusField(wrapper.value())
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def setRadiusField(self, radius_field):
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self.widget.setRadiusField(radius_field)
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def setValue(self, value):
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return self.widget.setValue(value)
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def value(self):
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return self.widget.value()
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