[processing] hide 'select file' button for vector layers when there a…

…re dependent params

fixes #21055

python/plugins/processing/gui/wrappers.py

@@ -846,6 +846,11 @@ def setValue(self, value):
     def value(self):
         return self.widget.getValue()
 
+def hasDependencies(wrappers, name):
+    for wrapper in wrappers:
+        if (hasattr(wrapper.parameterDefinition(), "parentLayerParameterName") and
+                    wrapper.parameterDefinition().parentLayerParameterName() == name):
+            return True
 
 class MapLayerWidgetWrapper(WidgetWrapper):
     NOT_SELECTED = '[Not selected]'
@@ -858,12 +863,12 @@ def createWidget(self):
             layout.setContentsMargins(0, 0, 0, 0)
             layout.setSpacing(6)
             self.combo = QgsMapLayerComboBox()
-            layout.addWidget(self.combo)
-            btn = QToolButton()
-            btn.setText('…')
-            btn.setToolTip(self.tr("Select file"))
-            btn.clicked.connect(self.selectFile)
-            layout.addWidget(btn)
+            layout.addWidget(self.combo)            
+            self.btn = QToolButton()
+            self.btn.setText('…')
+            self.btn.setToolTip(self.tr("Select file"))
+            self.btn.clicked.connect(self.selectFile)
+            layout.addWidget(self.btn)           
 
             widget.setLayout(layout)
             if ProcessingConfig.getSetting(ProcessingConfig.SHOW_CRS_DEF):
@@ -913,6 +918,9 @@ def createWidget(self):
     def setComboBoxFilters(self, combo):
         pass
 
+    def postInitialize(self, wrappers):
+        self.btn.setVisible(not hasDependencies(wrappers, self.parameterDefinition().name()))
+
     def getAvailableLayers(self):
         return self.dialog.getAvailableValuesOfType(
             [QgsProcessingParameterRasterLayer, QgsProcessingParameterMeshLayer, QgsProcessingParameterVectorLayer, QgsProcessingParameterMapLayer, QgsProcessingParameterString],
@@ -1097,12 +1105,12 @@ def createWidget(self):
             self.combo = QgsMapLayerComboBox()
             layout.addWidget(self.combo)
             layout.setAlignment(self.combo, Qt.AlignTop)
-            btn = QToolButton()
-            btn.setText('…')
-            btn.setToolTip(self.tr("Select file"))
-            btn.clicked.connect(self.selectFile)
-            layout.addWidget(btn)
-            layout.setAlignment(btn, Qt.AlignTop)
+            self.btn = QToolButton()
+            self.btn.setText('…')
+            self.btn.setToolTip(self.tr("Select file"))
+            self.btn.clicked.connect(self.selectFile)
+            layout.addWidget(self.btn)
+            layout.setAlignment(self.btn, Qt.AlignTop)
 
             vl = QVBoxLayout()
             vl.setMargin(0)
@@ -1133,7 +1141,6 @@ def createWidget(self):
                 if iface.activeLayer().type() == QgsMapLayer.VectorLayer:
                     self.combo.setLayer(iface.activeLayer())
                     self.use_selection_checkbox.setEnabled(iface.activeLayer().selectedFeatureCount() > 0)
-
             except:
                 pass
 
@@ -1180,6 +1187,9 @@ def createWidget(self):
             widget.setLayout(layout)
             return widget
 
+    def postInitialize(self, wrappers):
+        self.btn.setVisible(not hasDependencies(wrappers, self.parameterDefinition().name()))        
+
     def layerChanged(self, layer):
         if layer is None or layer.type() != QgsMapLayer.VectorLayer or layer.selectedFeatureCount() == 0:
             self.use_selection_checkbox.setChecked(False)
@@ -1438,11 +1448,11 @@ def createWidget(self):
             layout.setSpacing(6)
             self.combo = QgsMapLayerComboBox()
             layout.addWidget(self.combo)
-            btn = QToolButton()
-            btn.setText('…')
-            btn.setToolTip(self.tr("Select file"))
-            btn.clicked.connect(self.selectFile)
-            layout.addWidget(btn)
+            self.btn = QToolButton()
+            self.btn.setText('…')
+            self.btn.setToolTip(self.tr("Select file"))
+            self.btn.clicked.connect(self.selectFile)
+            layout.addWidget(self.btn)
 
             widget.setLayout(layout)
 
@@ -1507,6 +1517,9 @@ def createWidget(self):
             widget.setLayout(layout)
             return widget
 
+    def postInitialize(self, wrappers):
+        self.btn.setVisible(not hasDependencies(wrappers, self.parameterDefinition().name()))
+
     def selectFile(self):
         filename, selected_filter = self.getFileName(self.combo.currentText())
         if filename: