fix #18: add skip logic

travel_time_platform_plugin/algorithms/advanced.py

@@ -103,6 +103,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Used to identify this specific search in the results array. MUST be unique among all searches."
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             # Transportation
             self.addParameter(
@@ -116,6 +117,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "cycling, driving, driving+train (only in Great Britain), public_transport, walking, coach, bus, train, ferry, driving+ferry, cycling+ferry or cycling+public_transport (only in Netherlands)"
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -129,6 +131,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Time (in seconds) needed to board public transportation vehicle. Default is 0. Cannot be higher than travel_time. Used in public_transport, coach, bus, train, driving+train and cycling+public_transport transportation modes"
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -142,6 +145,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Maximum time (in seconds) of walking from source to a station/stop and from station/stop to destination. Default value is 900. Cannot be higher than travel_time. Used in public_transport, coach, bus, train, driving+train and cycling+public_transport transportation modes"
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -157,6 +161,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Maximum time (in seconds) of driving from source to train station. Default value is 1800. Cannot be higher than travel_time. Used in driving+train transportation mode"
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -172,6 +177,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Maximum time (in seconds) of cycling (including any ferry transfers) from source to a station or stop. Default value is 900. Cannot be higher than travel_time. Used in cycling+public_transport transportation mode"
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -185,6 +191,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Time (in seconds) required to park a car or a bike. Default is 300. Cannot be higher than travel_time. Used in driving+train and cycling+public_transport transportation modes."
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -198,6 +205,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Time (in seconds) required to board a ferry. Default is 0. Cannot be higher than travel_time. Used in public_transport, ferry, driving+ferry, cycling+ferry and cycling+public_transport transportation modes. For public_transport mode, pt_change_delay is used instead"
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -211,6 +219,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Search range width in seconds. width along with departure_time specify departure interval. For example, if you set departure_time to 9am and width to 1 hour, we will return a combined shape of all possible journeys that have departure time between 9am and 10am. Range width is limited to 12 hours"
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -223,6 +232,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Leave departure location at no earlier than given time. Example - 2017-10-18T08:00:00Z"
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -235,6 +245,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Travel time in seconds. Maximum value is 14400 (4 hours)"
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
         self.addParameter(
             QgsProcessingParameterNumber(
@@ -491,6 +502,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Set which fields should be joined back in the output layer."
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -504,6 +516,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Specifies level of detail of returned shape using scale type `simple`. Allowed values: lowest, low, medium, high, highest."
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -517,6 +530,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Enable to return only one shape from the search results. The returned shape will be approximately the biggest one among search results. Note that this will likely result in loss in accuracy."
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
             self.addParameter(
                 QgsProcessingParameterExpression(
@@ -530,6 +544,7 @@ def initAlgorithm(self, config):
                 help_text=tr(
                     "Enable to remove holes from returned polygons. Note that this will likely result in loss in accuracy."
                 ),
+                depends_on="INPUT_" + DEPARR + "_SEARCHES",
             )
 
         # Define additional input parameters

travel_time_platform_plugin/algorithms/base.py

@@ -21,9 +21,11 @@
 )
 from qgis.PyQt.QtCore import QSettings
 from qgis.PyQt.QtTest import QTest
+from qgis.utils import iface
 
 from .. import auth, cache, constants
 from ..libraries import iso3166
+from ..ui import AlgorithmDialogWithSkipLogic
 from ..utils import log, throttler, tr
 
 EPSG4326 = QgsCoordinateReferenceSystem("EPSG:4326")
@@ -42,14 +44,24 @@ def __init__(self, *args, **kwargs):
             True: collections.OrderedDict(),
             False: collections.OrderedDict(),
         }
-
-    def addParameter(self, parameter, advanced=False, help_text=None, *args, **kwargs):
-        """Helper to add parameters with help texts"""
+        self.skip_logic = {}
+
+    def addParameter(
+        self,
+        parameter,
+        advanced=False,
+        help_text=None,
+        depends_on=None,
+        *args,
+        **kwargs,
+    ):
+        """Helper to add parameters with help texts and skip logic"""
         if advanced:
             parameter.setFlags(
                 parameter.flags() | QgsProcessingParameterDefinition.FlagAdvanced
             )
         self.parameters_help[advanced][parameter.description()] = help_text
+        self.skip_logic[parameter.name()] = depends_on
 
         return super().addParameter(parameter, *args, **kwargs)
 
@@ -175,6 +187,11 @@ def serialize(o):
     def createInstance(self):
         return self.__class__()
 
+    def createCustomParametersWidget(self, parent):
+        if parent is None:
+            parent = iface.mainWindow()
+        return AlgorithmDialogWithSkipLogic(self, parent=parent)
+
     # Cosmetic methods to allow less verbose definition of these propreties in child classes
 
     def name(self):

travel_time_platform_plugin/tests/tests_misc.py

@@ -1,6 +1,9 @@
-from qgis.PyQt.QtWidgets import QDockWidget, QTreeView
+from processing import createAlgorithmDialog
+from qgis.core import QgsProcessingContext
+from qgis.PyQt.QtWidgets import QApplication, QDockWidget, QTreeView, QWidget
 from qgis.utils import iface
 
+from ..utils import log
 from .base import TestCaseBase
 
 
@@ -38,3 +41,70 @@ def test_loading_map_tiles(self):
             model.data(treeview.currentIndex()),
             "TravelTime - Lux",
         )
+
+    def test_skip_logic(self):
+        dialog = createAlgorithmDialog("ttp_v4:time_map", {})
+        params_widget = dialog.mainWidget()
+        advanced_groupbox = params_widget.findChild(QWidget, "grpAdvanced")
+
+        def assert_visibility(field_name: str, expected_visibility: bool):
+            label = params_widget.wrappers[field_name].wrappedLabel()
+            widget = params_widget.wrappers[field_name].wrappedWidget()
+            self.assertEqual(label.isVisibleTo(dialog), expected_visibility)
+            self.assertEqual(widget.isVisibleTo(dialog), expected_visibility)
+
+        def set_value(field_name: str, value: str):
+            wrapper = params_widget.wrappers[field_name]
+            log(f"Value was {wrapper.widgetValue()}")
+            wrapper.setWidgetValue(value, QgsProcessingContext())
+            QApplication.processEvents()
+
+        def toggle_advanced():
+            advanced_groupbox.toggleCollapsed()
+            QApplication.processEvents()
+
+        # show the dialog
+        dialog.show()
+
+        # initially, dependent fields should be hidden
+        assert_visibility("INPUT_DEPARTURE_ID", False)
+        assert_visibility("INPUT_DEPARTURE_EXISTING_FIELDS_TO_KEEP", False)
+
+        # close and reopen advanced groupbox
+        toggle_advanced()
+        toggle_advanced()
+
+        # this should have no effect
+        assert_visibility("INPUT_DEPARTURE_ID", False)
+        assert_visibility("INPUT_DEPARTURE_EXISTING_FIELDS_TO_KEEP", False)
+
+        # we set a value for departure searches
+        set_value("INPUT_DEPARTURE_SEARCHES", "something")
+
+        # dependent fields should now be visible
+        assert_visibility("INPUT_DEPARTURE_ID", True)
+        assert_visibility("INPUT_DEPARTURE_EXISTING_FIELDS_TO_KEEP", True)
+
+        # close and reopen advanced groupbox
+        toggle_advanced()
+        toggle_advanced()
+
+        # this should have no effect
+        assert_visibility("INPUT_DEPARTURE_ID", True)
+        assert_visibility("INPUT_DEPARTURE_EXISTING_FIELDS_TO_KEEP", True)
+
+        # FIXME: setting an empty value has no effect, and couldn't find a workaround, meaning we stop the test here
+        # unset a value for departure searches
+        # set_value("INPUT_DEPARTURE_SEARCHES", "")
+
+        # dependent fields should be hidden again
+        # assert_visibility("INPUT_DEPARTURE_ID", False)
+        # assert_visibility("INPUT_DEPARTURE_EXISTING_FIELDS_TO_KEEP", False)
+
+        # close and reopen advanced groupbox
+        # toggle_advanced()
+        # toggle_advanced()
+
+        # this should have no effect
+        # assert_visibility("INPUT_DEPARTURE_ID", False)
+        # assert_visibility("INPUT_DEPARTURE_EXISTING_FIELDS_TO_KEEP", False)

travel_time_platform_plugin/ui.py

@@ -1,6 +1,9 @@
 import os
 import webbrowser
 
+from processing.gui.AlgorithmDialog import AlgorithmDialog
+from processing.gui.ParametersPanel import ParametersPanel
+from qgis.gui import QgsAbstractProcessingParameterWidgetWrapper as Wrapper
 from qgis.PyQt import uic
 from qgis.PyQt.QtCore import QDate, QDateTime, QSettings, Qt, QTime, QUrl
 from qgis.PyQt.QtWidgets import QDateTimeEdit, QDialog, QWidget
@@ -216,3 +219,45 @@ def setValue(self, value):
 
     def value(self):
         return self.widget.dateTime().toString(Qt.ISODate)
+
+
+class AlgorithmDialogWithSkipLogic(AlgorithmDialog):
+    def getParametersPanel(self, alg, parent):
+        panel = ParametersPanel(parent, alg, self.in_place, self.active_layer)
+        skip_logic = self.algorithm().skip_logic
+
+        # callable that toggles visibility of a field's widget depending on another field
+        def toggler(wrapper: Wrapper, depends_on: Wrapper):
+            truthy = bool(depends_on.widgetValue())
+            wrapper.wrappedLabel().setVisible(truthy)
+            wrapper.wrappedWidget().setVisible(truthy)
+
+        # callable that toggles all the fields for initialisation
+        def toggle_all():
+            for field_name, wrapper in panel.wrappers.items():
+                depends_on_name = skip_logic.get(field_name, None)
+                if not depends_on_name:
+                    continue
+                depends_on = panel.wrappers[depends_on_name]
+                toggler(wrapper, depends_on=depends_on)
+
+        # connect signals on source fields for skip logic
+        for field_name, wrapper in panel.wrappers.items():
+            depends_on_name = skip_logic[field_name]
+            if not depends_on_name:
+                continue
+            depends_on = panel.wrappers[depends_on_name]
+            depends_on.widgetValueHasChanged.connect(
+                lambda depends_on, wrapper=wrapper: toggler(
+                    wrapper, depends_on=depends_on
+                )
+            )
+
+        # toggling groupbox resets it's children visibility, so we reinitialise it
+        advanced_groupbox = panel.findChild(QWidget, "grpAdvanced")
+        advanced_groupbox.collapsedStateChanged.connect(lambda _: toggle_all())
+
+        # initialise for opening state
+        toggle_all()
+
+        return panel