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https://github.com/qgis/QGIS.git
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152 lines
6.1 KiB
Python
152 lines
6.1 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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NumberInputDialog.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf 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__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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import os
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from PyQt4 import uic
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from PyQt4.QtGui import QDialog, QTreeWidgetItem, QMessageBox
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from qgis.core import QgsRasterLayer
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from qgis.utils import iface
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from processing.tools import dataobjects
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pluginPath = os.path.split(os.path.dirname(__file__))[0]
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WIDGET, BASE = uic.loadUiType(
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os.path.join(pluginPath, 'ui', 'DlgNumberInput.ui'))
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class NumberInputDialog(BASE, WIDGET):
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def __init__(self, isInteger):
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super(NumberInputDialog, self).__init__(None)
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self.setupUi(self)
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if hasattr(self.leFormula, 'setPlaceholderText'):
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self.leFormula.setPlaceholderText(
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self.tr('[Enter your formula here]'))
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self.treeValues.doubleClicked.connect(self.addValue)
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self.value = None
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self.isInteger = isInteger
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if not self.isInteger:
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self.lblWarning.hide()
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self.fillTree()
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def fillTree(self):
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layersItem = QTreeWidgetItem()
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layersItem.setText(0, self.tr('Values from data layers extents'))
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self.treeValues.addTopLevelItem(layersItem)
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layers = dataobjects.getAllLayers()
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for layer in layers:
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layerItem = QTreeWidgetItem()
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layerItem.setText(0, unicode(layer.name()))
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layerItem.addChild(TreeValueItem(self.tr('Min X'),
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layer.extent().xMinimum()))
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layerItem.addChild(TreeValueItem(self.tr('Max X'),
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layer.extent().xMaximum()))
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layerItem.addChild(TreeValueItem(self.tr('Min Y'),
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layer.extent().yMinimum()))
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layerItem.addChild(TreeValueItem(self.tr('Max Y'),
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layer.extent().yMaximum()))
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if isinstance(layer, QgsRasterLayer):
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cellsize = (layer.extent().xMaximum()
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- layer.extent().xMinimum()) / layer.width()
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layerItem.addChild(TreeValueItem(self.tr('Cellsize'),
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cellsize))
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layersItem.addChild(layerItem)
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layersItem = QTreeWidgetItem()
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layersItem.setText(0, self.tr('Values from raster layers statistics'))
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self.treeValues.addTopLevelItem(layersItem)
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layers = dataobjects.getRasterLayers()
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for layer in layers:
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for i in range(layer.bandCount()):
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stats = layer.dataProvider().bandStatistics(i + 1)
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layerItem = QTreeWidgetItem()
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layerItem.setText(0, unicode(layer.name()))
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layerItem.addChild(TreeValueItem(self.tr('Mean'), stats.mean))
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layerItem.addChild(TreeValueItem(self.tr('Std. deviation'),
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stats.stdDev))
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layerItem.addChild(TreeValueItem(self.tr('Max value'),
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stats.maximumValue))
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layerItem.addChild(TreeValueItem(self.tr('Min value'),
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stats.minimumValue))
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layersItem.addChild(layerItem)
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canvasItem = QTreeWidgetItem()
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canvasItem.setText(0, self.tr('Values from QGIS map canvas'))
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self.treeValues.addTopLevelItem(canvasItem)
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extent = iface.mapCanvas().extent()
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extentItem = QTreeWidgetItem()
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extentItem.setText(0, self.tr('Current extent'))
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extentItem.addChild(TreeValueItem(self.tr('Min X'), extent.xMinimum()))
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extentItem.addChild(TreeValueItem(self.tr('Max X'), extent.xMaximum()))
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extentItem.addChild(TreeValueItem(self.tr('Min Y'), extent.yMinimum()))
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extentItem.addChild(TreeValueItem(self.tr('Max Y'), extent.yMaximum()))
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canvasItem.addChild(extentItem)
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extent = iface.mapCanvas().fullExtent()
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extentItem = QTreeWidgetItem()
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extentItem.setText(0,
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self.tr('Full extent of all layers in map canvas'))
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extentItem.addChild(TreeValueItem(self.tr('Min X'), extent.xMinimum()))
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extentItem.addChild(TreeValueItem(self.tr('Max X'), extent.xMaximum()))
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extentItem.addChild(TreeValueItem(self.tr('Min Y'), extent.yMinimum()))
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extentItem.addChild(TreeValueItem(self.tr('Max Y'), extent.yMaximum()))
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canvasItem.addChild(extentItem)
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def addValue(self):
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item = self.treeValues.currentItem()
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if isinstance(item, TreeValueItem):
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formula = self.leFormula.text() + ' ' + str(item.value)
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self.leFormula.setText(formula.strip())
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def accept(self):
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try:
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self.value = float(eval(str(self.leFormula.text())))
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if self.isInteger:
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self.value = int(round(self.value))
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QDialog.accept(self)
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except:
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QMessageBox.critical(self, self.tr('Wrong expression'),
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self.tr('The expression entered is not correct'))
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def reject(self):
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self.value = None
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QDialog.reject(self)
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class TreeValueItem(QTreeWidgetItem):
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def __init__(self, name, value):
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QTreeWidgetItem.__init__(self)
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self.value = value
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self.setText(0, name + ': ' + str(value))
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