Qt第四章：渲染列表

柔情只为你懂 2024-04-07 14:51 91阅读 0赞

#### 一、基本使用 ####

import sys
    
    from PySide6.QtCore import Qt
    from PySide6.QtWidgets import QApplication, QMainWindow, QListWidget, QAbstractItemView, \
        QListWidgetItem
    
    if __name__ == '__main__':
        app = QApplication([])
    
        window = QMainWindow()
    
    
        list_widget = QListWidget(window)
        list_widget.resize(500, 300)
        # 设置可多选
        list_widget.setSelectionMode(QAbstractItemView.SelectionMode.MultiSelection)
        # 创建数据项
        item = QListWidgetItem()
        item.setText("新中国")
        # 显示复选框，【复选框的逻辑和列表是脱离的】
        item.setFlags(item.flags() | Qt.ItemIsUserCheckable)
        # 设置复选框状态（必须设置）
        item.setCheckState(Qt.Checked)
        list_widget.addItem(item)
    
    
        window.show()
        sys.exit(app.exec())

![d04fec3b74d84b7786d07bafcdc1bf77.png][]

#### 二、穿梭框实例 ####

效果图  
![13f876ac5c374e7891e19f55f0105531.png][]

class TemplateSelectWidget(QWidget):
        def __init__(self, group_id, parent=None):
            super(TemplateSelectWidget, self).__init__(parent=parent)
            self.resize(400, 300)
            # 组id
            self.group_id = group_id
            # 未拥有的
            self.unselected_list = []
            # 已拥有的
            self.selected_list = []
            # 布局
            self.layout = QHBoxLayout(self)
            self.setLayout(self.layout)
            self.lay = QVBoxLayout(self)
    
            # 两个带复选框的列表
            self.unselected_list_widget = QListWidget(self)
            # 设置多选
            self.unselected_list_widget.setSelectionMode(QAbstractItemView.SelectionMode.MultiSelection)
            self.unselected_list_widget.itemSelectionChanged.connect(self.handle_left_list_widget_selection_changed)
            self.selected_list_widget = QListWidget(self)
            # 设置多选
            self.selected_list_widget.setSelectionMode(QAbstractItemView.SelectionMode.MultiSelection)
            self.selected_list_widget.itemSelectionChanged.connect(self.handle_right_list_widget_selection_changed)
            # 左右穿梭的按钮
            button_go_left = QPushButton(self)
            button_go_left.setText("<<")
            button_go_left.clicked.connect(self.handle_button_left_click)
            button_go_right = QPushButton(self)
            button_go_right.clicked.connect(self.handle_button_right_click)
            button_go_right.setText(">>")
    
            self.lay.addItem(QSpacerItem(20, 40, QSizePolicy.Minimum, QSizePolicy.Expanding))
            self.lay.addWidget(button_go_left)
            self.lay.addWidget(button_go_right)
            self.lay.addItem(QSpacerItem(20, 40, QSizePolicy.Minimum, QSizePolicy.Expanding))
            # 垂直布局
    
            self.layout.addWidget(self.unselected_list_widget)
            self.layout.addLayout(self.lay)
            self.layout.addWidget(self.selected_list_widget)
    
            # 对上级进行模态化
            self.setWindowFlags(self.windowFlags() | Qt.Window)
            self.setParent(parent)
            self.setWindowModality(Qt.WindowModal)
            self.init_ui()
            self.show()
            Index.main_window.template_select = self
    
        def init_ui(self):
            self.unselected_list_widget.clear()
            self.selected_list_widget.clear()
    
            # 已拥有的
            self.selected_list: list[CodeTemplate] = template_list_by_group_id(self.group_id)
            # 所有
            all_data = [j for j in map(lambda x: x.id, self.selected_list)]
            # 未拥有
            self.unselected_list: list[CodeTemplate] = [i for i in template_list() if i.id not in all_data]
    
            for template_selected in self.selected_list:
                item = QListWidgetItem()
                item.setText(template_selected.name)
                item.setData(100, template_selected)
                item.setFlags(item.flags() | Qt.ItemIsUserCheckable)
                item.setCheckState(Qt.Unchecked)
                self.selected_list_widget.addItem(item)
    
            for template_unselected in self.unselected_list:
                item = QListWidgetItem()
                item.setText(template_unselected.name)
                item.setData(100, template_unselected)
                item.setFlags(item.flags() | Qt.ItemIsUserCheckable)
                item.setCheckState(Qt.Unchecked)
                
                self.unselected_list_widget.addItem(item)
    
        def handle_button_left_click(self):
            items = self.selected_list_widget.selectedItems()
            for item in items:
                self.unselected_list.append(item.data(100))
                self.selected_list.remove(item.data(100))
            # 已拥有的存入数据库
            selected: list[CodeTemplateCodeTemplateGroup] = [
                CodeTemplateCodeTemplateGroup(code_template_id=item.id, code_template_group_id=self.group_id) for
                item in self.selected_list]
            template_template_group_del_by_group_id(self.group_id)
            template_template_group_adds(selected)
            self.init_ui()
    
        def handle_button_right_click(self):
            items = self.unselected_list_widget.selectedItems()
            for item in items:
                self.selected_list.append(item.data(100))
                self.unselected_list.remove(item.data(100))
            # 已拥有的存入数据库
            selected: list[CodeTemplateCodeTemplateGroup] = [
                CodeTemplateCodeTemplateGroup(code_template_id=item.id, code_template_group_id=self.group_id) for
                item in self.selected_list]
            template_template_group_del_by_group_id(self.group_id)
            template_template_group_adds(selected)
            self.init_ui()
    
        def handle_left_list_widget_selection_changed(self):
            for i in range(self.unselected_list_widget.count()):
                item = self.unselected_list_widget.item(i)
                item.setCheckState(Qt.CheckState.Checked if item.isSelected() else Qt.CheckState.Unchecked)
    
        def handle_right_list_widget_selection_changed(self):
            for i in range(self.selected_list_widget.count()):
                item = self.selected_list_widget.item(i)
                item.setCheckState(Qt.CheckState.Checked if item.isSelected() else Qt.CheckState.Unchecked)

[d04fec3b74d84b7786d07bafcdc1bf77.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/e1884b7a549541bd98da819dac00c046.png
[13f876ac5c374e7891e19f55f0105531.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/07/e2d2ac8326b44ba5b8d1b3ad407acc31.png