初始化模块

def load_preview(main):
    """
    装载预览界面
    :param main:
    :return:
    """
    # 初始化界面变量
    declaring_variable(main)
    # 初始化界面布局
    init_preview(main)
    # 初始化 QGIS
    init_qgis_map(main)
    # 绑定方法
    bind_func(main)
    
    
def declaring_variable(main):
    main.preview_canvas = None  # 图层显示器
    main.preview_tool_pan = None
    main.preview_tool_zoom_in = None
    main.preview_tool_zoom_out = None


def init_preview(main):
    # 设置splitter缩放因子
    main.ui.splitter.setStretchFactor(0, 3)
    main.ui.splitter.setStretchFactor(1, 5)


def init_qgis_map(main):
    pass


def bind_func(main):
    pass

import gui.preview.preview as GUIPreview

import gui as GUI

class PyQgisSEApp(QMainWindow, Ui_MainWindow):
    def __init__(self, app: QgsApplication):
        super(PyQgisSEApp, self).__init__()
        self.app = app
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)

        # 装载模块
        GUI.GUIPreview.load_preview(self)