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tile2patch.py
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tile2patch.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
tile2patch
A QGIS plugin
create patches from tiles
Generated by Plugin Builder: http://g-sherman.github.io/Qgis-Plugin-Builder/
-------------------
begin : 2023-10-11
git sha : $Format:%H$
copyright : (C) 2023 by Ricardo Dalangol
email : ricds@hotmail.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. *
* *
***************************************************************************/
"""
from qgis.PyQt.QtCore import QSettings, QTranslator, QCoreApplication
from qgis.PyQt.QtGui import QIcon
from qgis.PyQt.QtWidgets import QAction
from qgis.core import * # QgsProject, QgsVectorLayer, QgsFeatureRequest, QgsVectorLayerUtils, QgsSymbolV2, QgsSingleSymbolRendererV2, QgsSimpleFillSymbolLayerV2
from qgis.utils import iface
from qgis import processing
import os
# Initialize Qt resources from file resources.py
from .resources import *
# Import the code for the dialog
from .tile2patch_dialog import tile2patchDialog
import os.path
class tile2patch:
"""QGIS Plugin Implementation."""
def __init__(self, iface):
"""Constructor.
:param iface: An interface instance that will be passed to this class
which provides the hook by which you can manipulate the QGIS
application at run time.
:type iface: QgsInterface
"""
# Save reference to the QGIS interface
self.iface = iface
# initialize plugin directory
self.plugin_dir = os.path.dirname(__file__)
# initialize locale
locale = QSettings().value('locale/userLocale')[0:2]
locale_path = os.path.join(
self.plugin_dir,
'i18n',
'tile2patch_{}.qm'.format(locale))
if os.path.exists(locale_path):
self.translator = QTranslator()
self.translator.load(locale_path)
QCoreApplication.installTranslator(self.translator)
# Declare instance attributes
self.actions = []
self.menu = self.tr(u'&tile2patch')
# Check if plugin was started the first time in current QGIS session
# Must be set in initGui() to survive plugin reloads
self.first_start = None
# noinspection PyMethodMayBeStatic
def tr(self, message):
"""Get the translation for a string using Qt translation API.
We implement this ourselves since we do not inherit QObject.
:param message: String for translation.
:type message: str, QString
:returns: Translated version of message.
:rtype: QString
"""
# noinspection PyTypeChecker,PyArgumentList,PyCallByClass
return QCoreApplication.translate('tile2patch', message)
def add_action(
self,
icon_path,
text,
callback,
enabled_flag=True,
add_to_menu=True,
add_to_toolbar=True,
status_tip=None,
whats_this=None,
parent=None):
"""Add a toolbar icon to the toolbar.
:param icon_path: Path to the icon for this action. Can be a resource
path (e.g. ':/plugins/foo/bar.png') or a normal file system path.
:type icon_path: str
:param text: Text that should be shown in menu items for this action.
:type text: str
:param callback: Function to be called when the action is triggered.
:type callback: function
:param enabled_flag: A flag indicating if the action should be enabled
by default. Defaults to True.
:type enabled_flag: bool
:param add_to_menu: Flag indicating whether the action should also
be added to the menu. Defaults to True.
:type add_to_menu: bool
:param add_to_toolbar: Flag indicating whether the action should also
be added to the toolbar. Defaults to True.
:type add_to_toolbar: bool
:param status_tip: Optional text to show in a popup when mouse pointer
hovers over the action.
:type status_tip: str
:param parent: Parent widget for the new action. Defaults None.
:type parent: QWidget
:param whats_this: Optional text to show in the status bar when the
mouse pointer hovers over the action.
:returns: The action that was created. Note that the action is also
added to self.actions list.
:rtype: QAction
"""
icon = QIcon(icon_path)
action = QAction(icon, text, parent)
action.triggered.connect(callback)
action.setEnabled(enabled_flag)
if status_tip is not None:
action.setStatusTip(status_tip)
if whats_this is not None:
action.setWhatsThis(whats_this)
if add_to_toolbar:
# Adds plugin icon to Plugins toolbar
self.iface.addToolBarIcon(action)
if add_to_menu:
self.iface.addPluginToMenu(
self.menu,
action)
self.actions.append(action)
return action
def initGui(self):
"""Create the menu entries and toolbar icons inside the QGIS GUI."""
# to update icon in qgis, update resources.qrc file manually, then run this command below in 'cmd' to create the resources.py
# pyrcc5 -o resources.py resources.qrc
icon_path = ':/plugins/tile2patch/icon.png'
self.add_action(
icon_path,
text=self.tr(u'tile2patch'),
callback=self.run,
parent=self.iface.mainWindow())
icon_config = ':/plugins/tile2patch/icon2.png'
self.add_action(
icon_config,
text=self.tr(u'tile2patch config'),
callback=self.config,
parent=self.iface.mainWindow())
# will be set False in run()
self.first_start = True
def unload(self):
"""Removes the plugin menu item and icon from QGIS GUI."""
for action in self.actions:
self.iface.removePluginMenu(
self.tr(u'&tile2patch'),
action)
self.iface.removeToolBarIcon(action)
def config(self):
# Create the dialog with elements (after translation) and keep reference
# Only create GUI ONCE in callback, so that it will only load when the plugin is started
if self.first_start == True:
self.first_start = False
self.dlg = tile2patchDialog()
# show the dialog
self.dlg.show()
def run(self):
"""Run method that performs all the real work"""
# Create the dialog with elements (after translation) and keep reference
# Only create GUI ONCE in callback, so that it will only load when the plugin is started
if self.first_start == True:
self.first_start = False
self.dlg = tile2patchDialog()
"""
# show the dialog
self.dlg.show()
# Run the dialog event loop
result = self.dlg.exec_()
"""
result = True;
# See if OK was pressed
if result:
# Do something useful here - delete the line containing pass and
# substitute with your code.
"""
# Fetch the currently loaded layers
layers = QgsProject.instance().layerTreeRoot().children()
# Clear the contents of the comboBox from previous runs
self.dlg.comboBox.clear()
# Populate the comboBox with names of all the loaded layers
self.dlg.comboBox.addItems([layer.name() for layer in layers])
"""
# function to remove layers
def rmLayer(lyrname):
qinst = QgsProject.instance()
layer = qinst.mapLayersByName(lyrname)[0]
qinst.removeMapLayer(layer.id())
# check if field exists in the shapefile
shpAttributeName = self.dlg.shpAttributeBox.text()
#field_name = "name"
field_name = shpAttributeName
layer = iface.activeLayer() # Gives you the layer you have selected in the Layers Panel
print(layer)
# determine if we have anything selected
haveSelection = len(layer.selectedFeatureIds()) > 0
# check if object is vector
proceed = False;
if isinstance(layer, QgsVectorLayer):
field_index = layer.fields().indexFromName(field_name)
# check if we have the correct attribute
if field_index == -1:
#print("The field {} does not exist in layer {}!".format(field_name, layer.name()))
proceed=False;
else:
#print("The field {} exists in layer {}!".format(field_name, layer.name()))
if haveSelection:
proceed=True;
print(proceed);
# proceed only if we have the correct shapefile with the 'name' attribute
if proceed:
# get available layers
layer = iface.activeLayer()
crs = layer.crs().toWkt()
#print(crs)
print(layer)
# creates a memory layer of original layer exclusively with all selected features in it
temp_layer = layer.materialize(QgsFeatureRequest().setFilterFids(layer.selectedFeatureIds()))
print(temp_layer)
# specify your target field
#result = QgsVectorLayerUtils.getValues(temp_layer, "name")[0]
result = QgsVectorLayerUtils.getValues(temp_layer, shpAttributeName)[0]
# print name of the tile
print(result)
# stop running code if we have nothing selected
if len(result[0]) == 0:
exit()
# check if this grid is not already on the layer list
## this piece of code is limited because it only checks one, so we get bug if more than one is selected and previously gridded
layer_name = 'grid_' + result[0]
# Check if a layer with the given name exists
layer_exists = QgsProject.instance().mapLayersByName(layer_name)
# if grid already exists we do nothing
if layer_exists:
pass;
else:
# create attribute in combobox to get all the items
setattr(self.dlg.comboBox, "allItems", lambda: [self.dlg.comboBox.itemText(i) for i in range(self.dlg.comboBox.count())])
# get data from the UI
last_grid = self.dlg.comboBox.currentText()
n_tiles = int(self.dlg.ntilesBox.text())
gridColor = self.dlg.gridColorBox.text()
deletePrevious = self.dlg.deletePreviousBox.isChecked()
last_layer_active = self.dlg.comboBox.allItems()
print(last_layer_active)
# delete layers created last time
loaded_layer_names = [layer.name() for layer in QgsProject.instance().mapLayers().values()]
#print(loaded_layer_names)
if deletePrevious:
# Iterate through the list of layer names
for layer_name in last_layer_active:
# Check if the layer name exists in the list of loaded layers
if layer_name in loaded_layer_names:
rmLayer(layer_name)
# clear combobox
self.dlg.comboBox.clear()
# iterate through features to create
for feature in temp_layer.getFeatures():
#print(feature["name"])
print(feature[shpAttributeName])
# get extent of selected tile
extent = feature.geometry().boundingBox()
#extent = temp_layer.extent()
#print(extent)
xmin = extent.xMinimum()
xmax = extent.xMaximum()
ymin = extent.yMinimum()
ymax = extent.yMaximum()
ext_str = str(xmin) + ',' + str(xmax) + ',' + str(ymin) + ',' + str(ymax)
#print(ext_str)
hsp = (xmax - xmin)/n_tiles
vsp = (ymax - ymin)/n_tiles
#print(hsp)
#print(vsp)
# get crs of the selected layer
#crs = temp_layer.crs().toWkt()
#print(crs)
# read the directory from the UI
dir_name = self.dlg.dirBox.text()
import os
#dir is not keyword
def makemydir(whatever):
try:
os.makedirs(whatever)
except OSError:
pass
# let exception propagate if we just can't
# cd into the specified directory
os.chdir(whatever)
# create dir if we have a dir
if len(dir_name) > 0:
makemydir(dir_name)
# run grid
#crs = QgsProject().instance().crs().toWkt() # it is EPSG:3857
params = {'TYPE':2,
#'EXTENT':'2308576.5177,2336787.5621,54157.4399,66396.9190',
'EXTENT':ext_str,
#'HSPACING':1221.12,
#'VSPACING':1221.12,
'HSPACING':hsp,
'VSPACING':vsp,
'HOVERLAY':0,
'VOVERLAY':0,
'CRS':crs,
'OUTPUT': dir_name + 'grid_' + feature[shpAttributeName]}
#'OUTPUT':'grid_' + feature["name"]}
#'OUTPUT':'grid_' + result[0]}
out1 = processing.run('native:creategrid', params)
print(out1)
# add to layers
#grid = QgsVectorLayer(out1['OUTPUT'], 'grid_' + feature["name"], 'ogr')
grid = QgsVectorLayer(out1['OUTPUT'], 'grid_' + feature[shpAttributeName], 'ogr')
print(grid)
QgsProject().instance().addMapLayer(grid)
# Create the symbol with the specified properties
symbol_dict = {
'color': 'black',
'style': 'no',
'outline_color': gridColor, # Replace with the desired outline color
'outline_width': 0.25 # Replace with the desired outline width
}
symbol = QgsSymbol.defaultSymbol(grid.geometryType())
symbol_layer = QgsSimpleFillSymbolLayer.create(symbol_dict)
symbol.changeSymbolLayer(0, symbol_layer)
# Apply the symbol to your vector grid
grid.renderer().setSymbol(symbol)
# Annotate the grid name in the box
self.dlg.comboBox.addItems([grid.name()])