Qt第六十三章：文件拖动上传

谁践踏了优雅 2024-03-22 08:40 54阅读 0赞

**目录**

一、目标：文件拖动到指定区域上传文件

二、实现

三、指定区域：只需将上一步的DragWidget加入应用的布局中即可

四、稍稍复杂一点的：带删除按钮和右键菜单

--------------------

#### 一、目标：文件拖动到指定区域上传文件 ####

#### 二、实现 ####

from PySide6.QtWidgets import QWidget, QFileDialog, QApplication
    
    
    class DragWidget(QWidget):
        def __init__(self, parent=None):
            super(DragWidget, self).__init__(parent)
            # 设置允许该区域接收拖放事件
            self.setAcceptDrops(True)
    
        def dragEnterEvent(self, event):
            # 获取拖放的文件列表
            files = event.mimeData().urls()
            # 如果文件列表非空，则接收拖放事件
            if files:
                event.accept()
            else:
                event.ignore()
    
        def dropEvent(self, event):
            files = event.mimeData().urls()
            for file in files:
                # 拖入的文件路径
                file_path = file.toLocalFile()
                print(file_path)
                # 利用这个路径，我们可以打开文件选择框，并定位到刚刚拖入的文件
                upload_path, _ = QFileDialog.getSaveFileName(self, "Upload", file_path)
                # 将文件上传到指定路径
    
    
    if __name__ == '__main__':
        app = QApplication([])
        window = DragWidget()
        window.show()
        app.exec()

#### 三、指定区域：只需将上一步的DragWidget加入应用的布局中即可 ####

#### 四、稍稍复杂一点的：带删除按钮和右键菜单 ####

from PySide6.QtCore import QPoint, Qt
    from PySide6.QtWidgets import QWidget, QFileDialog, QApplication, QListWidget, QVBoxLayout, QListWidgetItem, \
        QPushButton, QHBoxLayout, QLabel, QMenu, QAbstractItemView
    from functools import partial
    
    
    class DragWidget(QWidget):
        def __init__(self, parent=None):
            super(DragWidget, self).__init__(parent)
            # 设置允许该区域接收拖放事件
            self.setAcceptDrops(True)
            self.paths = []
            self.layout = QVBoxLayout()
            self.setLayout(self.layout)
            self.list_widget = QListWidget()
            # 设置列表允许多选
            self.list_widget.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)
            self.layout.addWidget(self.list_widget)
    
        def render_list_widget(self):
            self.list_widget.clear()
            for idx, item in enumerate(self.paths):
                # 创建QListWidgetItem实例
                list_item = QListWidgetItem()
    
    
                widget = QWidget()
                row_layout = QHBoxLayout()
                widget.setLayout(row_layout)
                label = QLabel(item)
                # 在QListWidgetItem上设置ContextMenuPolicy属性为Qt.CustomContextMenu
                label.setContextMenuPolicy(Qt.CustomContextMenu)
                # 将list_item与右键菜单signal customContextMenuRequested连接
                label.customContextMenuRequested.connect(self.show_menu)
    
                button = QPushButton('X')
                button.clicked.connect(partial(self.on_btn_clicked, list_item))
    
                button.setFixedSize(20, 20)
                button.setStyleSheet("background-color: red; color: white;")
                row_layout.addWidget(label)
                row_layout.addWidget(button)
                row_layout.setContentsMargins(0, 0, 1, 1)  # 去掉边距
    
                list_item.setSizeHint(row_layout.sizeHint())
                self.list_widget.addItem(list_item)
                self.list_widget.setItemWidget(list_item, widget)
    
        def on_btn_clicked(self, list_item):
            """
            处理按钮的信号槽函数
            """
            row = self.list_widget.row(list_item)
            self.list_widget.takeItem(row)
            del self.paths[row]
    
        def show_menu(self, widget):
            # 创建右键菜单
            menu = QMenu()
            # 添加删除项目的选项
            delete_action = menu.addAction("删除")
            # 如果是删除按钮的右键菜单，则获取对应的 QListWidgetItem 实例
            if isinstance(widget, QPushButton):
                list_item = widget.parent().parent()
            else:
                list_item = self.list_widget.currentItem()
            # 如果当前有选中的项目，则在右键菜单中显示删除选项
            if list_item is not None:
                action = menu.exec_(self.list_widget.mapToGlobal(widget))
                if action == delete_action:
                    # 获取选中项目的列表
                    selected_items = self.list_widget.selectedItems()
                    for item in selected_items:
                        # 获取项目所在行号
                        row = self.list_widget.row(item)
                        # 从QListWidget控件中删除行
                        self.list_widget.takeItem(row)
                        del self.paths[row]
    
        def dragEnterEvent(self, event):
            # 获取拖放的文件列表
            files = event.mimeData().urls()
            # 如果文件列表非空，则接收拖放事件
            if files:
                event.accept()
            else:
                event.ignore()
    
        def dropEvent(self, event):
            files = event.mimeData().urls()
            for file in files:
                # 拖入的文件路径
                file_path = file.toLocalFile()
                self.paths.append(file_path)
                self.render_list_widget()
    
    
    if __name__ == '__main__':
        app = QApplication([])
        window = DragWidget()
        window.show()
        app.exec()

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[d9a7d3b474d74c4a87ffcee6fac43417.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/d637525fb7bc49f0818f20ac28cb2b1b.png