初始化集成qgis

app/services/qgis/map_exporter.py

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+"""
+地图导出模块。布局文本更新、比例尺调整、图片导出。
+"""
+from qgis.core import QgsLayoutExporter, QgsScaleBarSettings
+
+from app.config.paths import get_logger
+
+logger = get_logger("qgis.exporter")
+
+
+class MapExporter:
+    def __init__(self, config: dict, layout):
+        self.config = config
+        self.layout = layout
+
+    def update_texts(self, model: dict) -> None:
+        """更新布局中的文本标签"""
+        for key in ["mapTitle", "mapTime", "mapUnit", "info"]:
+            label = self.layout.itemById(key)
+            if label is not None:
+                label.setText(model[key])
+
+    def update_scale_bar(self) -> None:
+        """调整比例尺为自适应宽度模式"""
+        scale_bar = self.layout.itemById("ScaleBar")
+        if scale_bar is None:
+            logger.warning("比例尺控件不存在")
+            return
+
+        scale_bar.setSegmentSizeMode(
+            QgsScaleBarSettings.SegmentSizeMode.SegmentSizeFitWidth
+        )
+        scale_bar.setMaximumBarWidth(70)
+        scale_bar.setMinimumBarWidth(40)
+
+    def export(self, path: str) -> None:
+        """导出布局为图片"""
+        dpi = self.config["qgis"]["exportDpi"]
+
+        settings = QgsLayoutExporter.ImageExportSettings()
+        settings.dpi = dpi
+
+        exporter = QgsLayoutExporter(self.layout)
+        result = exporter.exportToImage(path, settings)
+
+        if result != QgsLayoutExporter.Success:
+            raise RuntimeError(f"图片导出失败: {path}")
+
+        logger.info(f"图片已导出: {path}")