Merge pull request 'Meldung bei fehlender Verfahrensnummer geändert' (#4) from 22ottomi/Plugin_SN_Verfahrensgebiet:main into main

Reviewed-on: https://entwicklung.flurneuordnung-sachsen.de/AG_QGIS/Plugin_SN_Verfahrensgebiet/pulls/4

functions/verfahrensgebiet_alkis.py

@@ -1,7 +1,6 @@
-import os
+from enum import Enum
 from qgis.core import (
-    QgsVectorLayer, QgsProject, QgsFeature, QgsField,
+    QgsVectorLayer, QgsProject, QgsFeature, QgsField, QgsGeometry
-    QgsFeatureRequest, QgsGeometry
 )
 from qgis.PyQt.QtWidgets import QMessageBox
 from qgis.PyQt.QtCore import QVariant
@@ -10,32 +9,46 @@ from sn_basis import get_variable
 alkis_NAS_url = "https://geodienste.sachsen.de/aaa/public_alkis/nas/wfs"
 typename = "adv:AX_BauRaumOderBodenordnungsrecht"
 
+class LoadStatus(Enum):
+    NONE = "none"       # nichts geladen
+    FIRST = "first"     # erstmalig geladen
+    RELOAD = "reload"   # neu geladen
+    KEEP = "keep"       # vorhandener Layer behalten
 
-def alkis_verfahrensgebiet(tab_widget):
+
+def _check_existing_layer(tab_widget):
+    project = QgsProject.instance()
+    existing_layers = project.mapLayersByName("Verfahrensgebiet")
+    if not existing_layers:
+        return None, LoadStatus.FIRST
+
+    reply = QMessageBox.question(
+        tab_widget,
+        "Layer bereits vorhanden",
+        "Der Layer 'Verfahrensgebiet' existiert bereits.\n"
+        "Möchten Sie ihn löschen und neu laden?",
+        QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
+        QMessageBox.StandardButton.No
+    )
+    if reply == QMessageBox.StandardButton.Yes:
+        for lyr in existing_layers:
+            project.removeMapLayer(lyr.id())
+        return None, LoadStatus.RELOAD
+    else:
+        return existing_layers[0], LoadStatus.KEEP
+
+
+def verfahrensgebiet_alkis(tab_widget):
     verfahrensnummer = get_variable("verfahrensnummer")
     if not verfahrensnummer:
         QMessageBox.critical(tab_widget, "Fehler",
-                             "Die Projektvariable 'sn_verfahrensnummer' ist nicht gesetzt.")
+                             "In den Projekteigenschaften ist noch keine Verfahrensnummer eingetragen!")
-        tab_widget.setze_haken(tab_widget.haken1, False)
+        return None, LoadStatus.NONE
-        return None, False
 
-    project = QgsProject.instance()
+    # Vorhandenen Layer prüfen
-    existing_layers = project.mapLayersByName("Verfahrensgebiet")
+    existing, status = _check_existing_layer(tab_widget)
-    if existing_layers:
+    if status == LoadStatus.KEEP:
-        reply = QMessageBox.question(
+        return existing, status
-            tab_widget,
-            "Layer bereits vorhanden",
-            "Der Layer 'Verfahrensgebiet' existiert bereits.\n"
-            "Möchten Sie ihn löschen und neu laden?",
-            QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
-            QMessageBox.StandardButton.No
-        )
-        if reply == QMessageBox.StandardButton.Yes:
-            for lyr in existing_layers:
-                project.removeMapLayer(lyr.id())
-        else:
-            # Vorhandenen Layer zurückgeben, kein Neu-Laden
-            return existing_layers[0], False
 
     # WFS mit Filter laden
     wfs_uri_find = (
@@ -47,39 +60,31 @@ def alkis_verfahrensgebiet(tab_widget):
 
     if not temp_layer.isValid():
         QMessageBox.critical(tab_widget, "Fehler", "Layer konnte nicht geladen werden.")
-        return None, False
+        return None, LoadStatus.NONE
 
     features = list(temp_layer.getFeatures())
     if not features:
         QMessageBox.critical(tab_widget, "Fehler",
                              f"Verfahrenskennzeichen {verfahrensnummer} nicht im WFS gefunden.")
-        return None, False
+        return None, LoadStatus.NONE
-
-    # Geometrie bestimmen
-    if len(features) == 1:
-        union_geom = features[0].geometry()
-    else:
-        geoms = [f.geometry() for f in features]
-        union_geom = QgsGeometry.unaryUnion(geoms)
 
+    union_geom = QgsGeometry.unaryUnion([f.geometry() for f in features])
     if union_geom is None or union_geom.isEmpty():
         QMessageBox.critical(tab_widget, "Fehler", "Keine Geometrien zum Verschmelzen gefunden.")
-        return None, False
+        return None, LoadStatus.NONE
 
-    # Memory-Layer mit festem Namen "Verfahrensgebiet"
+    # Memory-Layer erzeugen
     crs = temp_layer.crs().authid()
     memory_layer = QgsVectorLayer(f"Polygon?crs={crs}", "Verfahrensgebiet", "memory")
     pr = memory_layer.dataProvider()
-
-    # Feld "VKZ" hinzufügen
     pr.addAttributes([QgsField("VKZ", QVariant.String)])
     memory_layer.updateFields()
 
-    # Feature mit Geometrie erstellen
     feat_union = QgsFeature()
     feat_union.setGeometry(union_geom)
     feat_union.setAttributes([verfahrensnummer])
     pr.addFeatures([feat_union])
     memory_layer.updateExtents()
 
-    return memory_layer, True
+    # Status: FIRST oder RELOAD
+    return memory_layer, status

main.py

@@ -2,7 +2,6 @@ from qgis.utils import plugins
 from sn_basis.ui.dockmanager import DockManager
 from .ui.dockwidget import DockWidget
 
-
 class Verfahrensgebiet:
     def __init__(self, iface):
         self.iface = iface
@@ -13,8 +12,11 @@ class Verfahrensgebiet:
         self.plugin_name = self.__class__.__name__
         self.dock_name = f"sn_dock_{self.plugin_name.lower()}"
 
+    def _basis(self):
+        return plugins.get("sn_basis")
+
     def initGui(self):
-        basis = plugins.get("sn_basis")
+        basis = self._basis()
         if basis and basis.ui:
             self.action = basis.ui.add_action(
                 self.plugin_name,
@@ -31,12 +33,22 @@ class Verfahrensgebiet:
             self.dockwidget = None
 
         if self.action:
-            basis = plugins.get("sn_basis")
+            basis = self._basis()
             if basis and basis.ui:
-                # Action aus Menü und Toolbar entfernen
                 basis.ui.remove_action(self.action)
             self.action = None
 
+    # def run(self):
+    #     if not self.dockwidget:
+    #         self.dockwidget = DockWidget(self.iface.mainWindow(), subtitle=self.plugin_name)
+    #         self.dockwidget.setObjectName(self.dock_name)
+    #         self.dockwidget.action = self.action
+
+    #     DockManager.show(self.dockwidget)
+
+    #     basis = self._basis()
+    #     if basis and basis.ui:
+    #         basis.ui.set_active_plugin(self.action)
     def run(self):
         self.dockwidget = DockWidget(self.iface.mainWindow(), subtitle=self.plugin_name)
         self.dockwidget.setObjectName(self.dock_name)
@@ -49,4 +61,4 @@ class Verfahrensgebiet:
         # Toolbar-Button als aktiv markieren
         basis = plugins.get("sn_basis")
         if basis and basis.ui:
-            basis.ui.set_active_plugin(self.action)
+            basis.ui.set_active_plugin(self.action)

metadata.txt

@@ -2,7 +2,7 @@
 name=LNO Sachsen | Verfahrensgebiet
 qgisMinimumVersion=3.0
 description=Plugin zum Erzeugen eines Objektes "Verfahrensgebiet"
-version=25.11.3
+version=25.11.4
 author=Michael Otto
 email=michael.otto@landkreis-mittelsachsen.de
 about=Plugin zum Erzeugen eines Objektes "Verfahrensgebiet"

ui/dockwidget.py

@@ -1,8 +1,7 @@
 from sn_basis.ui.tabs.settings_tab import SettingsTab
-from sn_verfahrensgebiet.ui.tabs.tab_a import TabA
+from sn_verfahrensgebiet.ui.tabs.working_tab import WorkingTab
-from sn_verfahrensgebiet.ui.tabs.tab_b import TabB
 from sn_basis.ui.base_dockwidget import BaseDockWidget
 
 
 class DockWidget(BaseDockWidget):
-    tabs = [TabA, SettingsTab]
+    tabs = [WorkingTab, SettingsTab]

ui/tabs/Verfahrensgebiet.qml

@@ -1,140 +0,0 @@
-<!DOCTYPE qgis PUBLIC 'http://mrcc.com/qgis.dtd' 'SYSTEM'>
-<qgis version="3.40.7-Bratislava" styleCategories="Symbology">
-  <renderer-v2 referencescale="-1" forceraster="0" enableorderby="0" type="singleSymbol" symbollevels="0">
-    <symbols>
-      <symbol is_animated="0" frame_rate="10" clip_to_extent="1" type="fill" alpha="1" force_rhr="0" name="0">
-        <data_defined_properties>
-          <Option type="Map">
-            <Option type="QString" value="" name="name"/>
-            <Option name="properties"/>
-            <Option type="QString" value="collection" name="type"/>
-          </Option>
-        </data_defined_properties>
-        <layer locked="0" id="{feca00b2-500a-4c9a-b285-67ba2d99d8f6}" enabled="1" class="SimpleLine" pass="0">
-          <Option type="Map">
-            <Option type="QString" value="0" name="align_dash_pattern"/>
-            <Option type="QString" value="square" name="capstyle"/>
-            <Option type="QString" value="5;2" name="customdash"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="customdash_map_unit_scale"/>
-            <Option type="QString" value="MM" name="customdash_unit"/>
-            <Option type="QString" value="0" name="dash_pattern_offset"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="dash_pattern_offset_map_unit_scale"/>
-            <Option type="QString" value="MM" name="dash_pattern_offset_unit"/>
-            <Option type="QString" value="0" name="draw_inside_polygon"/>
-            <Option type="QString" value="round" name="joinstyle"/>
-            <Option type="QString" value="215,168,255,255,rgb:0.84313725490196079,0.6588235294117647,1,1" name="line_color"/>
-            <Option type="QString" value="solid" name="line_style"/>
-            <Option type="QString" value="1.5" name="line_width"/>
-            <Option type="QString" value="MM" name="line_width_unit"/>
-            <Option type="QString" value="-0.75" name="offset"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="offset_map_unit_scale"/>
-            <Option type="QString" value="MM" name="offset_unit"/>
-            <Option type="QString" value="0" name="ring_filter"/>
-            <Option type="QString" value="0" name="trim_distance_end"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="trim_distance_end_map_unit_scale"/>
-            <Option type="QString" value="MM" name="trim_distance_end_unit"/>
-            <Option type="QString" value="0" name="trim_distance_start"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="trim_distance_start_map_unit_scale"/>
-            <Option type="QString" value="MM" name="trim_distance_start_unit"/>
-            <Option type="QString" value="0" name="tweak_dash_pattern_on_corners"/>
-            <Option type="QString" value="0" name="use_custom_dash"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="width_map_unit_scale"/>
-          </Option>
-          <data_defined_properties>
-            <Option type="Map">
-              <Option type="QString" value="" name="name"/>
-              <Option name="properties"/>
-              <Option type="QString" value="collection" name="type"/>
-            </Option>
-          </data_defined_properties>
-        </layer>
-        <layer locked="0" id="{fdc4d6fd-0995-41df-bbfb-19970b4fc2cc}" enabled="1" class="SimpleLine" pass="0">
-          <Option type="Map">
-            <Option type="QString" value="0" name="align_dash_pattern"/>
-            <Option type="QString" value="square" name="capstyle"/>
-            <Option type="QString" value="5;2" name="customdash"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="customdash_map_unit_scale"/>
-            <Option type="QString" value="MM" name="customdash_unit"/>
-            <Option type="QString" value="0" name="dash_pattern_offset"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="dash_pattern_offset_map_unit_scale"/>
-            <Option type="QString" value="MM" name="dash_pattern_offset_unit"/>
-            <Option type="QString" value="0" name="draw_inside_polygon"/>
-            <Option type="QString" value="round" name="joinstyle"/>
-            <Option type="QString" value="204,174,137,255,rgb:0.80000000000000004,0.68235294117647061,0.53725490196078429,1" name="line_color"/>
-            <Option type="QString" value="solid" name="line_style"/>
-            <Option type="QString" value="0.5" name="line_width"/>
-            <Option type="QString" value="MM" name="line_width_unit"/>
-            <Option type="QString" value="0" name="offset"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="offset_map_unit_scale"/>
-            <Option type="QString" value="MM" name="offset_unit"/>
-            <Option type="QString" value="0" name="ring_filter"/>
-            <Option type="QString" value="0" name="trim_distance_end"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="trim_distance_end_map_unit_scale"/>
-            <Option type="QString" value="MM" name="trim_distance_end_unit"/>
-            <Option type="QString" value="0" name="trim_distance_start"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="trim_distance_start_map_unit_scale"/>
-            <Option type="QString" value="MM" name="trim_distance_start_unit"/>
-            <Option type="QString" value="0" name="tweak_dash_pattern_on_corners"/>
-            <Option type="QString" value="0" name="use_custom_dash"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="width_map_unit_scale"/>
-          </Option>
-          <data_defined_properties>
-            <Option type="Map">
-              <Option type="QString" value="" name="name"/>
-              <Option name="properties"/>
-              <Option type="QString" value="collection" name="type"/>
-            </Option>
-          </data_defined_properties>
-        </layer>
-      </symbol>
-    </symbols>
-    <rotation/>
-    <sizescale/>
-    <data-defined-properties>
-      <Option type="Map">
-        <Option type="QString" value="" name="name"/>
-        <Option name="properties"/>
-        <Option type="QString" value="collection" name="type"/>
-      </Option>
-    </data-defined-properties>
-  </renderer-v2>
-  <selection mode="Default">
-    <selectionColor invalid="1"/>
-    <selectionSymbol>
-      <symbol is_animated="0" frame_rate="10" clip_to_extent="1" type="fill" alpha="1" force_rhr="0" name="">
-        <data_defined_properties>
-          <Option type="Map">
-            <Option type="QString" value="" name="name"/>
-            <Option name="properties"/>
-            <Option type="QString" value="collection" name="type"/>
-          </Option>
-        </data_defined_properties>
-        <layer locked="0" id="{f18003f5-220a-487f-8a6d-b24facc4c1a5}" enabled="1" class="SimpleFill" pass="0">
-          <Option type="Map">
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="border_width_map_unit_scale"/>
-            <Option type="QString" value="0,0,255,255,rgb:0,0,1,1" name="color"/>
-            <Option type="QString" value="bevel" name="joinstyle"/>
-            <Option type="QString" value="0,0" name="offset"/>
-            <Option type="QString" value="3x:0,0,0,0,0,0" name="offset_map_unit_scale"/>
-            <Option type="QString" value="MM" name="offset_unit"/>
-            <Option type="QString" value="35,35,35,255,rgb:0.13725490196078433,0.13725490196078433,0.13725490196078433,1" name="outline_color"/>
-            <Option type="QString" value="solid" name="outline_style"/>
-            <Option type="QString" value="0.26" name="outline_width"/>
-            <Option type="QString" value="MM" name="outline_width_unit"/>
-            <Option type="QString" value="solid" name="style"/>
-          </Option>
-          <data_defined_properties>
-            <Option type="Map">
-              <Option type="QString" value="" name="name"/>
-              <Option name="properties"/>
-              <Option type="QString" value="collection" name="type"/>
-            </Option>
-          </data_defined_properties>
-        </layer>
-      </symbol>
-    </selectionSymbol>
-  </selection>
-  <blendMode>0</blendMode>
-  <featureBlendMode>0</featureBlendMode>
-  <layerGeometryType>2</layerGeometryType>
-</qgis>

ui/tabs/tab_a.py

@@ -1,98 +0,0 @@
-from qgis.PyQt.QtWidgets import QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton, QMessageBox
-from qgis.PyQt.QtGui import QIcon, QPixmap
-from qgis.PyQt.QtCore import Qt, QTimer
-from qgis.core import Qgis, QgsProject, QgsMessageLog
-from qgis.utils import iface
-import os
-
-from sn_verfahrensgebiet.logic.alkis_verfahrensgebiet import alkis_verfahrensgebiet
-from sn_basis.logic.utils import zoom_to_layer
-
-class TabA(QWidget):
-    tab_title = "Bearbeitung"
-
-    def __init__(self, parent=None):
-        super().__init__(parent)
-
-        layout = QVBoxLayout()
-        layout.setAlignment(Qt.AlignmentFlag.AlignTop)
-
-        # Abschnitt 1: Verfahrensgebiet
-        row_verf_header = QHBoxLayout()
-        lbl_verf = QLabel("<b>Verfahrensgebiet</b>")
-        self.haken1 = self._haken_label()
-        row_verf_header.addWidget(lbl_verf)
-        row_verf_header.addWidget(self.haken1)
-        row_verf_header.addStretch()
-        layout.addLayout(row_verf_header)
-
-        row_verf_buttons = QHBoxLayout()
-        self.btn_verf_alkis = QPushButton("Aus ALKIS laden")
-        self.btn_verf_shape = QPushButton("Aus Shape laden")
-        row_verf_buttons.addWidget(self.btn_verf_alkis)
-        row_verf_buttons.addWidget(self.btn_verf_shape)
-        layout.addLayout(row_verf_buttons)
-
-        # Abschnitt 2: Flurstücke
-        row_flurst_header = QHBoxLayout()
-        lbl_flurst = QLabel("<b>Flurstücke</b>")
-        self.haken2 = self._haken_label()
-        row_flurst_header.addWidget(lbl_flurst)
-        row_flurst_header.addWidget(self.haken2)
-        row_flurst_header.addStretch()
-        layout.addLayout(row_flurst_header)
-
-        row_flurst_buttons = QHBoxLayout()
-        self.btn_flurst_alkis = QPushButton("Aus ALKIS laden")
-        self.btn_flurst_shape = QPushButton("Aus Shape laden")
-        row_flurst_buttons.addWidget(self.btn_flurst_alkis)
-        row_flurst_buttons.addWidget(self.btn_flurst_shape)
-        layout.addLayout(row_flurst_buttons)
-
-        layout.addStretch()
-        self.setLayout(layout)
-
-        # Beispiel: Haken anzeigen nach Klick
-        # self.button1.clicked.connect(lambda: alkis_verfahrensgebiet(self))
-        self.btn_verf_alkis.clicked.connect(lambda: self.handle_button1())
-
-        #self.button2.clicked.connect(lambda: self.setze_haken(self.haken2, True))
-
-    def handle_button1(self):
-        layer, neu_geladen = alkis_verfahrensgebiet(self)
-
-        if not layer or not layer.isValid():
-            return
-
-        if neu_geladen:
-            QgsProject.instance().addMapLayer(layer)
-            iface.mapCanvas().setExtent(layer.extent())
-            iface.mapCanvas().refresh()
-            # Beispiel: Haken setzen oder Meldung ausgeben
-            self.setze_haken(self.haken1, True)
-            # QMessageBox.information(self, "Info", "Layer 'Verfahrensgebiet' wurde neu geladen.")
-        else:
-            # Kein Zoom, kein Neu-Laden
-            QgsMessageLog.logMessage("Vorhandener Layer behalten.", "sn_verfahrensgebiet", level=Qgis.Info)
-
-
-    def _haken_label(self):
-        label = QLabel()
-        label.setFixedSize(20, 20)
-#        label.setAlignment(Qt.AlignCenter)
-        label.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        label.setScaledContents(False)
-        label.setText("")
-        return label
-
-    def setze_haken(self, label: QLabel, aktiv: bool):
-        """Zeigt oder entfernt den grünen Haken."""
-        if aktiv:
-            # grünes Unicode-Häkchen
-            label.setPixmap(QPixmap())
-            label.setText("✓")
-            label.setStyleSheet("color: #2ea043; font-weight: bold;")
-        else:
-            label.setPixmap(QPixmap())
-            label.setText("")
-            label.setStyleSheet("")

ui/tabs/tab_b.py

@@ -1,11 +0,0 @@
-from qgis.PyQt.QtWidgets import QWidget, QVBoxLayout, QLabel, QTextEdit
-
-class TabB(QWidget):
-    tab_title = "Tab B"
-
-    def __init__(self, parent=None):
-        super().__init__(parent)
-        layout = QVBoxLayout()
-        layout.addWidget(QLabel("Plugin1 – Tab B"))
-        layout.addWidget(QTextEdit("Mehrzeiliger Text für Plugin1"))
-        self.setLayout(layout)

ui/tabs/working_tab.py

@@ -0,0 +1,112 @@
+from qgis.PyQt.QtWidgets import QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton, QMessageBox
+from qgis.PyQt.QtCore import Qt
+from qgis.core import Qgis, QgsProject, QgsMessageLog
+from qgis.utils import iface
+
+from sn_verfahrensgebiet.functions.verfahrensgebiet_alkis import verfahrensgebiet_alkis, LoadStatus
+from sn_basis.functions.messages import success, info, warning, error
+from sn_basis.functions.styles import apply_style
+
+class WorkingTab(QWidget):
+    tab_title = "Bearbeitung"
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+
+        layout = QVBoxLayout()
+        layout.setAlignment(Qt.AlignmentFlag.AlignTop)
+
+        # Abschnitt 1: Verfahrensgebiet
+        row_verf_header = QHBoxLayout()
+        lbl_verf = QLabel("<b>Verfahrensgebiet</b>")
+        self.haken_verf = self._haken_label()
+        row_verf_header.addWidget(lbl_verf)
+        row_verf_header.addWidget(self.haken_verf)
+        row_verf_header.addStretch()
+        layout.addLayout(row_verf_header)
+
+        row_verf_buttons = QHBoxLayout()
+        self.btn_verf_alkis = QPushButton("Aus ALKIS laden")
+        self.btn_verf_shape = QPushButton("Aus Shape laden")
+        row_verf_buttons.addWidget(self.btn_verf_alkis)
+        row_verf_buttons.addWidget(self.btn_verf_shape)
+        layout.addLayout(row_verf_buttons)
+
+        # Abschnitt 2: Flurstücke (Platzhalter für spätere Implementierung)
+        row_flurst_header = QHBoxLayout()
+        lbl_flurst = QLabel("<b>Flurstücke</b>")
+        self.haken_flurst = self._haken_label()
+        row_flurst_header.addWidget(lbl_flurst)
+        row_flurst_header.addWidget(self.haken_flurst)
+        row_flurst_header.addStretch()
+        layout.addLayout(row_flurst_header)
+
+        row_flurst_buttons = QHBoxLayout()
+        self.btn_flurst_alkis = QPushButton("Aus ALKIS laden")
+        self.btn_flurst_shape = QPushButton("Aus Shape laden")
+        row_flurst_buttons.addWidget(self.btn_flurst_alkis)
+        row_flurst_buttons.addWidget(self.btn_flurst_shape)
+        layout.addLayout(row_flurst_buttons)
+
+        layout.addStretch()
+        self.setLayout(layout)
+
+        # Signale verbinden
+        self.btn_verf_alkis.clicked.connect(self.handle_verf_alkis)
+        # self.btn_verf_shape.clicked.connect(self.handle_verf_shape)
+        # self.btn_flurst_alkis.clicked.connect(self.handle_flurst_alkis)
+        # self.btn_flurst_shape.clicked.connect(self.handle_flurst_shape)
+
+    def handle_verf_alkis(self):
+        self._set_busy(self.btn_verf_alkis, True)
+        try:
+            layer, status = verfahrensgebiet_alkis(self)
+            if not layer or not layer.isValid():
+                return
+
+            if status in (LoadStatus.FIRST, LoadStatus.RELOAD):
+                # Gemeinsame Logik für erstmaliges und erneutes Laden
+                QgsProject.instance().addMapLayer(layer)
+                iface.mapCanvas().setExtent(layer.extent())
+                iface.mapCanvas().refresh()
+                
+                apply_style(layer, "verfahrensgebiet.qml")
+                
+                self.setze_haken(self.haken_verf, True)
+
+                # Unterschied nur in der Meldung
+                msg = "erstmalig geladen" if status == LoadStatus.FIRST else "neu geladen"
+                success("Verfahrensgebiet", f"Layer wurde {msg}.", duration=5)
+
+            elif status == LoadStatus.KEEP:
+                info("Verfahrensgebiet", "Vorhandener Layer wurde behalten.", duration=4)
+
+            elif status == LoadStatus.NONE:
+                warning("Verfahrensgebiet", "Layer konnte nicht geladen werden.", duration=None)
+
+        finally:
+            self._set_busy(self.btn_verf_alkis, False)
+
+    def _set_busy(self, button: QPushButton, busy: bool):
+        button.setEnabled(not busy)
+        if busy:
+            button.setText("Lade ...")
+        else:
+            button.setText("Aus ALKIS laden")
+
+    def _haken_label(self) -> QLabel:
+        label = QLabel()
+        label.setFixedSize(20, 20)
+        label.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        label.setText("")  # Start ohne Haken
+        return label
+
+    def setze_haken(self, label: QLabel, aktiv: bool):
+        """Zeigt oder entfernt den grünen Haken (Unicode), ohne Theme-Icons."""
+        if aktiv:
+            label.setText("✓")
+            label.setStyleSheet("color: #2ea043; font-weight: bold;")
+        else:
+            label.setText("")
+            label.setStyleSheet("")
+