zoom to each point and wait for rendercomplete signal

zoom_to_points.py

from qgis.PyQt.QtWidgets import QDockWidget, QPushButton, QVBoxLayout, QWidget
from qgis.PyQt.QtCore import Qt
from qgis.core import QgsProject, QgsPointXY
from qgis.utils import iface

# Steuerungsvariablen
stop_script = False
features = []
index = 0
waiting_for_render = False

# Layername und Maßstab
#layer_name = 'Dein_Punktlayername'  # ← Hier ggf den exakten Layernamen eintragen, wenn nicht der active layer benutzt wird
scale = 500

def start_zoom():
    global stop_script, features, index
    stop_script = False
    index = 0

    # Layer suchen
    
    ######### man kann auch über den Layernamen gehen...
    #layers = QgsProject.instance().mapLayersByName(layer_name)
    #if not layers:
    #    print(f"❌ Layer '{layer_name}' nicht gefunden!")
    #    return

    #layer = layers[0]
    #######################
        

    layer =iface.activeLayer() # ich geh lieber ueber den aktiven layer 
    
    features.clear()
    features.extend(layer.getFeatures())

    # Signal verbinden
    try:
        iface.mapCanvas().renderComplete.disconnect(on_render_complete)
    except TypeError:
        pass  # Falls vorher nicht verbunden

    iface.mapCanvas().renderComplete.connect(on_render_complete)
    zoom_next()

def stop_zoom():
    global stop_script
    stop_script = True
    try:
        iface.mapCanvas().renderComplete.disconnect(on_render_complete)
    except TypeError:
        pass  # Signal war nicht verbunden
    print("⏹️ Zoom-Vorgang gestoppt.")

def zoom_next():
    global index, features, stop_script, waiting_for_render
    if stop_script or index >= len(features):
        print("✅ Fertig oder abgebrochen.")
        try:
            iface.mapCanvas().renderComplete.disconnect(on_render_complete)
        except TypeError:
            pass
        return

    feature = features[index]
    point = feature.geometry().asPoint()
    iface.mapCanvas().setCenter(QgsPointXY(point))
    iface.mapCanvas().zoomScale(scale)
    iface.mapCanvas().refresh()
    waiting_for_render = True

def on_render_complete(painter):
    global index, waiting_for_render
    if waiting_for_render:
        waiting_for_render = False
        index += 1
        zoom_next()

# Dock-Widget mit Buttons
dock = QDockWidget("🔍 Punkt-Zoom-Steuerung", iface.mainWindow())
widget = QWidget()
layout = QVBoxLayout()

btn_start = QPushButton("▶️ Start")
btn_start.clicked.connect(start_zoom)
layout.addWidget(btn_start)

btn_stop = QPushButton("⏹️ Stopp")
btn_stop.clicked.connect(stop_zoom)
layout.addWidget(btn_stop)

widget.setLayout(layout)
dock.setWidget(widget)
iface.addDockWidget(Qt.LeftDockWidgetArea, dock)