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"""
***************************************************************************
ExtentSelectionPanel.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"
import os
import warnings
from qgis.PyQt import uic
from qgis.PyQt.QtWidgets import (
QMenu,
QAction,
QDialog,
QVBoxLayout,
QDialogButtonBox,
QLabel,
)
from qgis.PyQt.QtGui import QCursor
from qgis.PyQt.QtCore import QCoreApplication, pyqtSignal
from qgis.gui import QgsMapLayerComboBox
from qgis.utils import iface
from qgis.core import (
Qgis,
QgsProcessingParameterDefinition,
QgsProcessingParameters,
QgsProject,
QgsReferencedRectangle,
QgsMapLayerProxyModel,
)
from processing.gui.RectangleMapTool import RectangleMapTool
from processing.core.ProcessingConfig import ProcessingConfig
from processing.tools.dataobjects import createContext
pluginPath = os.path.split(os.path.dirname(__file__))[0]
with warnings.catch_warnings():
warnings.filterwarnings("ignore", category=DeprecationWarning)
WIDGET, BASE = uic.loadUiType(
os.path.join(pluginPath, "ui", "widgetBaseSelector.ui")
)
class LayerSelectionDialog(QDialog):
def __init__(self, parent=None):
super().__init__(parent)
self.setWindowTitle(self.tr("Select Extent"))
vl = QVBoxLayout()
vl.addWidget(QLabel(self.tr("Use extent from")))
self.combo = QgsMapLayerComboBox()
self.combo.setFilters(
Qgis.LayerFilter.HasGeometry
| Qgis.LayerFilter.RasterLayer
| Qgis.LayerFilter.MeshLayer
)
self.combo.setShowCrs(
ProcessingConfig.getSetting(ProcessingConfig.SHOW_CRS_DEF)
)
vl.addWidget(self.combo)
self.button_box = QDialogButtonBox()
self.button_box.setStandardButtons(
QDialogButtonBox.StandardButton.Cancel | QDialogButtonBox.StandardButton.Ok
)
self.button_box.accepted.connect(self.accept)
self.button_box.rejected.connect(self.reject)
vl.addWidget(self.button_box)
self.setLayout(vl)
def selected_layer(self):
return self.combo.currentLayer()
class ExtentSelectionPanel(BASE, WIDGET):
hasChanged = pyqtSignal()
def __init__(self, dialog, param):
super().__init__(None)
self.setupUi(self)
self.leText.textChanged.connect(lambda: self.hasChanged.emit())
self.dialog = dialog
self.param = param
self.crs = QgsProject.instance().crs()
if self.param.flags() & QgsProcessingParameterDefinition.Flag.FlagOptional:
if hasattr(self.leText, "setPlaceholderText"):
self.leText.setPlaceholderText(
self.tr("[Leave blank to use min covering extent]")
)
self.btnSelect.clicked.connect(self.selectExtent)
if iface is not None:
canvas = iface.mapCanvas()
self.prevMapTool = canvas.mapTool()
self.tool = RectangleMapTool(canvas)
self.tool.rectangleCreated.connect(self.updateExtent)
else:
self.prevMapTool = None
self.tool = None
if param.defaultValue() is not None:
context = createContext()
rect = QgsProcessingParameters.parameterAsExtent(
param, {param.name(): param.defaultValue()}, context
)
crs = QgsProcessingParameters.parameterAsExtentCrs(
param, {param.name(): param.defaultValue()}, context
)
if not rect.isNull():
try:
s = "{},{},{},{}".format(
rect.xMinimum(),
rect.xMaximum(),
rect.yMinimum(),
rect.yMaximum(),
)
if crs.isValid():
s += " [" + crs.authid() + "]"
self.crs = crs
self.leText.setText(s)
except:
pass
def selectExtent(self):
popupmenu = QMenu()
useCanvasExtentAction = QAction(
QCoreApplication.translate("ExtentSelectionPanel", "Use Canvas Extent"),
self.btnSelect,
)
useLayerExtentAction = QAction(
QCoreApplication.translate("ExtentSelectionPanel", "Use Layer Extent…"),
self.btnSelect,
)
selectOnCanvasAction = QAction(
self.tr("Select Extent on Canvas"), self.btnSelect
)
popupmenu.addAction(useCanvasExtentAction)
popupmenu.addAction(selectOnCanvasAction)
popupmenu.addSeparator()
popupmenu.addAction(useLayerExtentAction)
selectOnCanvasAction.triggered.connect(self.selectOnCanvas)
useLayerExtentAction.triggered.connect(self.useLayerExtent)
useCanvasExtentAction.triggered.connect(self.useCanvasExtent)
if self.param.flags() & QgsProcessingParameterDefinition.Flag.FlagOptional:
useMincoveringExtentAction = QAction(
self.tr("Use Min Covering Extent from Input Layers"), self.btnSelect
)
useMincoveringExtentAction.triggered.connect(self.useMinCoveringExtent)
popupmenu.addAction(useMincoveringExtentAction)
popupmenu.exec(QCursor.pos())
def useMinCoveringExtent(self):
self.leText.setText("")
def useLayerExtent(self):
dlg = LayerSelectionDialog(self)
if dlg.exec():
layer = dlg.selected_layer()
self.setValueFromRect(QgsReferencedRectangle(layer.extent(), layer.crs()))
def useCanvasExtent(self):
self.setValueFromRect(
QgsReferencedRectangle(
iface.mapCanvas().extent(),
iface.mapCanvas().mapSettings().destinationCrs(),
)
)
def selectOnCanvas(self):
canvas = iface.mapCanvas()
canvas.setMapTool(self.tool)
self.dialog.showMinimized()
def updateExtent(self):
r = self.tool.rectangle()
self.setValueFromRect(r)
def setValueFromRect(self, r):
s = f"{r.xMinimum()},{r.xMaximum()},{r.yMinimum()},{r.yMaximum()}"
try:
self.crs = r.crs()
except:
self.crs = QgsProject.instance().crs()
if self.crs.isValid():
s += " [" + self.crs.authid() + "]"
self.leText.setText(s)
self.tool.reset()
canvas = iface.mapCanvas()
canvas.setMapTool(self.prevMapTool)
self.dialog.showNormal()
self.dialog.raise_()
self.dialog.activateWindow()
def getValue(self):
if str(self.leText.text()).strip() != "":
return str(self.leText.text())
else:
return None
def setExtentFromString(self, s):
self.leText.setText(s)
|
