mirror of
https://github.com/qgis/QGIS.git
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24ba0309ff
1) All fTools functions should now add all layers to dropdowns (including non-visible layers), 2) All fTools functions should now be non-modal 3) Several fTools functions have been spead up slightly 4) Where possible, internal (cpp) functions have be used to replace older Python functions 5) Defining projections now also considers .qpj files Fixes bugs #2502 and #2506, and possibly others? git-svn-id: http://svn.osgeo.org/qgis/trunk@13037 c8812cc2-4d05-0410-92ff-de0c093fc19c
182 lines
8.2 KiB
Python
Executable File
182 lines
8.2 KiB
Python
Executable File
# -*- coding: utf-8 -*-
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#-----------------------------------------------------------
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#
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# Generate Vector Grid
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#
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# A QGIS plugin for generating a line or polygon grid
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#
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# Copyright (C) 2008 Carson Farmer
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#
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# EMAIL: carson.farmer (at) gmail.com
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# WEB : www.geog.uvic.ca/spar/carson
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#
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#-----------------------------------------------------------
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#
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# licensed under the terms of GNU GPL 2
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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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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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#---------------------------------------------------------------------
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from PyQt4.QtCore import *
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from PyQt4.QtGui import *
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import ftools_utils
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from qgis.core import *
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from ui_frmVectorGrid import Ui_Dialog
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class Dialog(QDialog, Ui_Dialog):
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def __init__(self, iface):
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QDialog.__init__(self)
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self.iface = iface
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self.setupUi(self)
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QObject.connect(self.toolOut, SIGNAL("clicked()"), self.outFile)
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QObject.connect(self.spnX, SIGNAL("valueChanged(double)"), self.offset)
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#QObject.connect(self.inShape, SIGNAL("currentIndexChanged(QString)"), self.updateInput)
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QObject.connect(self.btnUpdate, SIGNAL("clicked()"), self.updateLayer)
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QObject.connect(self.btnCanvas, SIGNAL("clicked()"), self.updateCanvas)
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self.setWindowTitle(self.tr("Vector grid"))
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self.xMin.setValidator(QDoubleValidator(self.xMin))
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self.xMax.setValidator(QDoubleValidator(self.xMax))
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self.yMin.setValidator(QDoubleValidator(self.yMin))
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self.yMax.setValidator(QDoubleValidator(self.yMax))
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layermap = QgsMapLayerRegistry.instance().mapLayers()
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for name, layer in layermap.iteritems():
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self.inShape.addItem( unicode( layer.name() ) )
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def offset(self, value):
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if self.chkLock.isChecked():
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self.spnY.setValue(value)
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def updateLayer( self ):
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mLayerName = self.inShape.currentText()
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if not mLayerName == "":
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mLayer = ftools_utils.getMapLayerByName( unicode( mLayerName ) )
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boundBox = mLayer.extent()
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self.updateExtents( boundBox )
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def updateCanvas( self ):
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canvas = self.iface.mapCanvas()
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boundBox = canvas.extent()
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self.updateExtents( boundBox )
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def updateExtents( self, boundBox ):
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self.xMin.setText( unicode( boundBox.xMinimum() ) )
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self.yMin.setText( unicode( boundBox.yMinimum() ) )
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self.xMax.setText( unicode( boundBox.xMaximum() ) )
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self.yMax.setText( unicode( boundBox.yMaximum() ) )
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def accept(self):
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if self.xMin.text() == "" or self.xMax.text() == "" or self.yMin.text() == "" or self.yMax.text() == "":
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QMessageBox.information(self, self.tr("Vector grid"), self.tr("Please specify valid extent coordinates"))
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elif self.outShape.text() == "":
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QMessageBox.information(self, self.tr("Vector grid"), self.tr("Please specify output shapefile"))
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else:
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try:
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boundBox = QgsRectangle(
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float( self.xMin.text() ),
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float( self.yMin.text() ),
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float( self.xMax.text() ),
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float( self.yMax.text() ) )
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except:
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QMessageBox.information(self, self.tr("Vector grid"), self.tr("Invalid extent coordinates entered"))
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xSpace = self.spnX.value()
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ySpace = self.spnY.value()
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if self.rdoPolygons.isChecked(): polygon = True
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else: polygon = False
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self.outShape.clear()
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self.compute( boundBox, xSpace, ySpace, polygon )
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addToTOC = QMessageBox.question(self, self.tr("Generate Vector Grid"), self.tr("Created output shapefile:\n%1\n\nWould you like to add the new layer to the TOC?").arg(unicode(self.shapefileName)), QMessageBox.Yes, QMessageBox.No, QMessageBox.NoButton)
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if addToTOC == QMessageBox.Yes:
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ftools_utils.addShapeToCanvas( self.shapefileName )
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self.progressBar.setValue( 0 )
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def compute( self, bound, xOffset, yOffset, polygon ):
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crs = self.canvas.mapRenderer().destinationSrs()
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if not crs.isValid(): crs = None
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if polygon:
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fields = {0:QgsField("ID", QVariant.Int), 1:QgsField("XMIN", QVariant.Double), 2:QgsField("XMAX", QVariant.Double),
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3:QgsField("YMIN", QVariant.Double), 4:QgsField("YMAX", QVariant.Double)}
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check = QFile(self.shapefileName)
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if check.exists():
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if not QgsVectorFileWriter.deleteShapeFile(self.shapefileName):
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return
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writer = QgsVectorFileWriter(self.shapefileName, self.encoding, fields, QGis.WKBPolygon, crs)
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#writer = QgsVectorFileWriter(outPath, "CP1250", fields, QGis.WKBPolygon, None)
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else:
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fields = {0:QgsField("ID", QVariant.Int), 1:QgsField("COORD", QVariant.Double)}
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check = QFile(self.shapefileName)
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if check.exists():
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if not QgsVectorFileWriter.deleteShapeFile(self.shapefileName):
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return
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writer = QgsVectorFileWriter(self.shapefileName, self.encoding, fields, QGis.WKBLineString, crs)
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#writer = QgsVectorFileWriter(unicode(outPath), "CP1250", fields, QGis.WKBLineString, None)
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outFeat = QgsFeature()
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outGeom = QgsGeometry()
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idVar = 0
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self.progressBar.setRange( 0, 0 )
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if not polygon:
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y = bound.yMaximum()
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while y >= bound.yMinimum():
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pt1 = QgsPoint(bound.xMinimum(), y)
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pt2 = QgsPoint(bound.xMaximum(), y)
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line = [pt1, pt2]
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outFeat.setGeometry(outGeom.fromPolyline(line))
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outFeat.addAttribute(0, QVariant(idVar))
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outFeat.addAttribute(1, QVariant(y))
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writer.addFeature(outFeat)
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y = y - yOffset
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idVar = idVar + 1
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x = bound.xMinimum()
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while x <= bound.xMaximum():
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pt1 = QgsPoint(x, bound.yMaximum())
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pt2 = QgsPoint(x, bound.yMinimum())
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line = [pt1, pt2]
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outFeat.setGeometry(outGeom.fromPolyline(line))
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outFeat.addAttribute(0, QVariant(idVar))
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outFeat.addAttribute(1, QVariant(x))
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writer.addFeature(outFeat)
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x = x + xOffset
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idVar = idVar + 1
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else:
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y = bound.yMaximum()
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while y >= bound.yMinimum():
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x = bound.xMinimum()
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while x <= bound.xMaximum():
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pt1 = QgsPoint(x, y)
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pt2 = QgsPoint(x + xOffset, y)
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pt3 = QgsPoint(x + xOffset, y - yOffset)
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pt4 = QgsPoint(x, y - yOffset)
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pt5 = QgsPoint(x, y)
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polygon = [[pt1, pt2, pt3, pt4, pt5]]
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outFeat.setGeometry(outGeom.fromPolygon(polygon))
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outFeat.addAttribute(0, QVariant(idVar))
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outFeat.addAttribute(1, QVariant(x))
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outFeat.addAttribute(2, QVariant(x + xOffset))
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outFeat.addAttribute(3, QVariant(y - yOffset))
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outFeat.addAttribute(4, QVariant(y))
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writer.addFeature(outFeat)
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idVar = idVar + 1
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x = x + xOffset
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y = y - yOffset
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self.progressBar.setRange( 0, 100 )
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del writer
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def outFile(self):
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self.outShape.clear()
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( self.shapefileName, self.encoding ) = ftools_utils.saveDialog( self )
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if self.shapefileName is None or self.encoding is None:
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return
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self.outShape.setText( QString( self.shapefileName ) )
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