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# -*- coding: utf-8 -*-
"""
***************************************************************************
NumberInputDialog.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__ = '$Format:%H$'
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *
from qgis.utils import iface
from processing.tools import dataobjects
from processing.ui.ui_DlgNumberInput import Ui_DlgNumberInput
class NumberInputDialog(QDialog, Ui_DlgNumberInput):
def __init__(self, isInteger):
QDialog.__init__(self)
self.setupUi(self)
if hasattr(self.leFormula, 'setPlaceholderText'):
self.leFormula.setPlaceholderText(
self.tr('[Enter your formula here]'))
self.treeValues.doubleClicked.connect(self.addValue)
self.value = None
self.isInteger = isInteger
if not self.isInteger:
self.lblWarning.hide()
self.fillTree()
def fillTree(self):
layersItem = QTreeWidgetItem()
layersItem.setText(0, self.tr('Values from data layers extents'))
self.treeValues.addTopLevelItem(layersItem)
layers = dataobjects.getAllLayers()
for layer in layers:
layerItem = QTreeWidgetItem()
layerItem.setText(0, unicode(layer.name()))
layerItem.addChild(TreeValueItem(self.tr('Min X'),
layer.extent().xMinimum()))
layerItem.addChild(TreeValueItem(self.tr('Max X'),
layer.extent().xMaximum()))
layerItem.addChild(TreeValueItem(self.tr('Min Y'),
layer.extent().yMinimum()))
layerItem.addChild(TreeValueItem(self.tr('Max Y'),
layer.extent().yMaximum()))
if isinstance(layer, QgsRasterLayer):
cellsize = (layer.extent().xMaximum()
- layer.extent().xMinimum()) / layer.width()
layerItem.addChild(TreeValueItem(self.tr('Cellsize'),
cellsize))
layersItem.addChild(layerItem)
layersItem = QTreeWidgetItem()
layersItem.setText(0, self.tr('Values from raster layers statistics'))
self.treeValues.addTopLevelItem(layersItem)
layers = dataobjects.getRasterLayers()
for layer in layers:
for i in range(layer.bandCount()):
stats = layer.dataProvider().bandStatistics(i + 1)
layerItem = QTreeWidgetItem()
layerItem.setText(0, unicode(layer.name()))
layerItem.addChild(TreeValueItem(self.tr('Mean'), stats.mean))
layerItem.addChild(TreeValueItem(self.tr('Std. deviation'),
stats.stdDev))
layerItem.addChild(TreeValueItem(self.tr('Max value'),
stats.maximumValue))
layerItem.addChild(TreeValueItem(self.tr('Min value'),
stats.minimumValue))
layersItem.addChild(layerItem)
canvasItem = QTreeWidgetItem()
canvasItem.setText(0, self.tr('Values from QGIS map canvas'))
self.treeValues.addTopLevelItem(canvasItem)
extent = iface.mapCanvas().extent()
extentItem = QTreeWidgetItem()
extentItem.setText(0, self.tr('Current extent'))
extentItem.addChild(TreeValueItem(self.tr('Min X'), extent.xMinimum()))
extentItem.addChild(TreeValueItem(self.tr('Max X'), extent.xMaximum()))
extentItem.addChild(TreeValueItem(self.tr('Min Y'), extent.yMinimum()))
extentItem.addChild(TreeValueItem(self.tr('Max Y'), extent.yMaximum()))
canvasItem.addChild(extentItem)
extent = iface.mapCanvas().fullExtent()
extentItem = QTreeWidgetItem()
extentItem.setText(0,
self.tr('Full extent of all layers in map canvas'))
extentItem.addChild(TreeValueItem(self.tr('Min X'), extent.xMinimum()))
extentItem.addChild(TreeValueItem(self.tr('Max X'), extent.xMaximum()))
extentItem.addChild(TreeValueItem(self.tr('Min Y'), extent.yMinimum()))
extentItem.addChild(TreeValueItem(self.tr('Max Y'), extent.yMaximum()))
canvasItem.addChild(extentItem)
def addValue(self):
item = self.treeValues.currentItem()
if isinstance(item, TreeValueItem):
formula = self.leFormula.text() + ' ' + str(item.value)
self.leFormula.setText(formula.strip())
def accept(self):
try:
self.value = float(eval(str(self.leFormula.text())))
if self.isInteger:
self.value = int(round(self.value))
QDialog.accept(self)
except:
QMessageBox.critical(self, self.tr('Wrong expression'),
self.tr('The expression entered is not correct'))
def reject(self):
self.value = None
QDialog.reject(self)
class TreeValueItem(QTreeWidgetItem):
def __init__(self, name, value):
QTreeWidgetItem.__init__(self)
self.value = value
self.setText(0, name + ': ' + str(value))
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