PyQt5将小部件动态添加到布局

from PyQt5 import QtCore, QtGui, QtWidgets from PyQt5.QtCore import Qt class LoadModelWidget(QtWidgets.QWidget): def __init__(self, *args, **kwargs): super(LoadModelWidget, self).__init__(*args, **kwargs) # ------------------------ GUI Components ------------------------ # self.setFixedHeight(100) self._container = QtWidgets.QGroupBox(self) self._container.setSizePolicy(QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)) self._container.setFixedHeight(100) self._container.setFixedWidth(210) layout = QtWidgets.QGridLayout() self._model_to_select_label = QtWidgets.QLabel("Selected model") layout.addWidget(self._model_to_select_label, 0, 0) self._model_to_select_list = QtWidgets.QComboBox() layout.addWidget(self._model_to_select_list, 0, 1) _slice_method_label = QtWidgets.QLabel("Slice method") layout.addWidget(_slice_method_label, 1, 0) self._list_of_slicing_method = QtWidgets.QComboBox() layout.addWidget(self._list_of_slicing_method, 1, 1) self._bottom_radius_label = QtWidgets.QLabel("Bottom radius") layout.addWidget(self._bottom_radius_label, 2, 0) self._bottom_radius_edit = QtWidgets.QLineEdit() layout.addWidget(self._bottom_radius_edit, 2, 1) self._top_radius_label = QtWidgets.QLabel("Top radius") layout.addWidget(self._top_radius_label, 3, 0) self._top_radius_edit = QtWidgets.QLineEdit() layout.addWidget(self._top_radius_edit, 3, 1) self._height_label = QtWidgets.QLabel("Height") layout.addWidget(self._height_label, 4, 0) self._height_edit = QtWidgets.QLineEdit() layout.addWidget(self._height_edit, 4, 1) self._x_dir_label = QtWidgets.QLabel("X direction") layout.addWidget(self._x_dir_label, 5, 0) self._x_dir_edit = QtWidgets.QLineEdit() layout.addWidget(self._x_dir_edit, 5, 1) self._y_dir_label = QtWidgets.QLabel("Y direction") layout.addWidget(self._y_dir_label, 6, 0) self._y_dir_edit = QtWidgets.QLineEdit() layout.addWidget(self._y_dir_edit, 6, 1) self._z_dir_label = QtWidgets.QLabel("Z direction") layout.addWidget(self._z_dir_label, 7, 0) self._z_dir_edit = QtWidgets.QLineEdit() layout.addWidget(self._z_dir_edit, 7, 1) self._remove_btn = QtWidgets.QPushButton("Remove model") layout.addWidget(self._remove_btn, 8, 0) self._bottom_radius_label.setVisible(False) self._bottom_radius_edit.setVisible(False) self._top_radius_label.setVisible(False) self._top_radius_edit.setVisible(False) self._height_label.setVisible(False) self._height_edit.setVisible(False) self._x_dir_label.setVisible(False) self._x_dir_edit.setVisible(False) self._y_dir_label.setVisible(False) self._y_dir_edit.setVisible(False) self._z_dir_label.setVisible(False) self._z_dir_edit.setVisible(False) self._container.setLayout(layout) # -------------------- Other attributes -------------------- " self._filename = "" # -------------------- Assign slot and signal -------------------- " self._list_of_slicing_method.currentIndexChanged.connect(self.slice_method_changed) self._remove_btn.clicked.connect(self.remove_model) def set_model_dir(self, filename, filedir, suggested_slicing_method="Parallel"): # Assign only the name of the file, not the whole stl model self._filename = filename self._filedir = filedir self._list_of_slicing_method.addItem("Parallel") self._list_of_slicing_method.addItem("Revolution") self._list_of_slicing_method.addItem("Radial") self._list_of_slicing_method.addItem("ParallelCurve") self._list_of_slicing_method.setCurrentText(suggested_slicing_method) def get_model_full_dir(self): return self._filedir + "\\" + self._filename def remove_model(self): self._filename = "" self._filedir = "" self._list_of_slicing_method.clear() def slice_method_changed(self): is_parallel = self._list_of_slicing_method.currentText() == "Parallel" is_radial = self._list_of_slicing_method.currentText() == "Radial" self._bottom_radius_label.setVisible(is_radial) self._bottom_radius_edit.setVisible(is_radial) self._top_radius_label.setVisible(is_radial) self._top_radius_edit.setVisible(is_radial) self._height_label.setVisible(is_radial) self._height_edit.setVisible(is_radial) self._x_dir_label.setVisible(is_parallel) self._x_dir_edit.setVisible(is_parallel) self._y_dir_label.setVisible(is_parallel) self._y_dir_edit.setVisible(is_parallel) self._z_dir_label.setVisible(is_parallel) self._z_dir_edit.setVisible(is_parallel) padding = 50 minimum_height = 100 new_height = (self._bottom_radius_label.height() + padding)*is_radial + (self._top_radius_edit.height() + padding)*is_radial + (self._height_label.height() + padding)*is_radial + (self._x_dir_label.height() + padding)*is_parallel + (self._y_dir_label.height() + padding)*is_parallel + (self._z_dir_label.height() + padding)*is_parallel if (new_height > minimum_height): self._container.setFixedHeight(new_height) self.setFixedHeight(new_height) else: self._container.setFixedHeight(minimum_height) self.setFixedHeight(minimum_height) class LoadModelColumn(QtWidgets.QWidget): def __init__(self, *args, **kwargs): super(LoadModelColumn, self).__init__(*args, **kwargs) # ------------------------ GUI Components ------------------------ # self._layout = QtWidgets.QGridLayout() self._add_model_btn = QtWidgets.QPushButton("Add model(s)") self._layout.addWidget(self._add_model_btn, 0, 0) self._clear_all_btn = QtWidgets.QPushButton("Clear all") self._layout.addWidget(self._clear_all_btn, 0, 1) self._all_load_model_widgets = [] self.verticalSpacer = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.MinimumExpanding) self._layout.addItem(self.verticalSpacer) self._load_model_group = QtWidgets.QGroupBox() self._load_model_group.setLayout(self._layout) self._scroll_area = QtWidgets.QScrollArea(self) self._scroll_area.setWidgetResizable(True) self._scroll_area.setFixedHeight(600) self._scroll_area.setFixedWidth(250) self._scroll_area.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn) self._scroll_area.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff) self._scroll_area.setWidget(self._load_model_group) # -------------------- Assign slot and signal -------------------- " self._clear_all_btn.clicked.connect(self._clear_all_models) self._add_model_btn.clicked.connect(self._add_models) def _clear_all_models(self): for widget in self._all_load_model_widgets: self._layout.removeWidget(widget) widget.deleteLater() self._all_load_model_widgets = [] def _add_models(self): widget = LoadModelWidget() widget.set_model_dir("hi", "hello") self._all_load_model_widgets.append(widget) self._layout.addWidget(widget, len(self._all_load_model_widgets), 0, 1, 0)

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1楼 · 发布于 2024-06-29 01:02:26

您正在向顶级窗口小部件添加小部件，但没有为它们设置布局

对于您的问题，简单的答案是为您正在创建的小部件正确设置布局。在LoadModelWidget的__init__底部添加以下内容：

        layout = QtWidgets.QVBoxLayout(self)
        layout.addWidget(self._container)

这是在{}的{}底部：

        layout = QtWidgets.QVBoxLayout(self)
        layout.addWidget(self._scroll_area)

然后删除所有不必要的setFixedHeight，这没有任何意义

我强烈建议您更好地研究layout manager work，因为所有需要调整其内容的小部件也需要您为它们设置布局。
然后我还建议您更好地阐明类的对象结构。例如，如果QWidget总是包含一个组框，那么就不需要从QWidget子类LoadModelWidget：只需子类QGroupBox

_{作为旁注（但仍然非常重要），始终尽量减少示例（阅读有关创建minimal, reproducible examples的更多信息（您甚至可能自己找到解决方案）；而且，这也是非常重要的，始终努力使这些示例立即可复制：从您的代码来看，不清楚使用哪个类作为父类），并且您的示例非常长；我们必须能够复制和粘贴您的代码，并尽可能轻松地运行它：这意味着我们希望帮助您，但您必须帮助我们帮助您。}

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