如何在qgraphicsview中添加qlineEdit 和一个qt软键盘
时间: 2024-02-24 17:55:41 浏览: 30
要在 QGraphicsView 中添加 QLineEdit 和一个 Qt 软键盘,你需要创建一个自定义的 QGraphicsView 类,并在其构造函数中添加 QLineEdit 和软键盘。
以下是一个示例代码片段,演示如何在 QGraphicsView 中添加 QLineEdit 和软键盘:
```python
from PyQt5.QtWidgets import QGraphicsScene, QGraphicsView, QGraphicsProxyWidget, QLineEdit, QWidget, QVBoxLayout, QPushButton
from PyQt5.QtGui import QKeyEvent
class MyGraphicsView(QGraphicsView):
def __init__(self):
super().__init__()
# 创建一个 QGraphicsScene 对象
self.scene = QGraphicsScene()
self.setScene(self.scene)
# 创建一个 QLineEdit 对象
self.line_edit = QLineEdit()
self.line_edit.setPlaceholderText("Click to enter text")
# 创建一个软键盘 widget
self.keyboard_widget = QWidget()
self.keyboard_layout = QVBoxLayout()
self.keyboard_widget.setLayout(self.keyboard_layout)
# 添加按钮到软键盘 widget
self.btns = []
for i in range(10):
btn = QPushButton(str(i))
btn.clicked.connect(lambda ch, i=i: self.line_edit.insert(str(i)))
self.btns.append(btn)
self.keyboard_layout.addWidget(btn)
# 创建一个 QGraphicsProxyWidget 对象,并将 QLineEdit 设置为其 widget 属性
self.proxy_widget = QGraphicsProxyWidget()
self.proxy_widget.setWidget(self.line_edit)
# 将 QGraphicsProxyWidget 对象添加到 QGraphicsScene 中
self.scene.addItem(self.proxy_widget)
def keyPressEvent(self, event: QKeyEvent) -> None:
if event.key() == Qt.Key_Tab:
if self.line_edit.hasFocus():
self.line_edit.clearFocus()
self.keyboard_widget.setFocus()
else:
self.line_edit.setFocus()
self.keyboard_widget.clearFocus()
def showEvent(self, event) -> None:
super().showEvent(event)
# 将软键盘 widget 添加到 QGraphicsScene 中
self.keyboard_proxy_widget = QGraphicsProxyWidget()
self.keyboard_proxy_widget.setWidget(self.keyboard_widget)
self.scene.addItem(self.keyboard_proxy_widget)
# 设置软键盘位置
keyboard_pos = self.mapToGlobal(self.line_edit.pos() + self.line_edit.rect().bottomLeft())
self.keyboard_proxy_widget.setPos(self.mapFromGlobal(keyboard_pos))
# 隐藏软键盘 widget
self.keyboard_widget.hide()
def focusOutEvent(self, event) -> None:
super().focusOutEvent(event)
# 隐藏软键盘 widget
self.keyboard_widget.hide()
def focusInEvent(self, event) -> None:
super().focusInEvent(event)
# 显示软键盘 widget
self.keyboard_widget.show()
# 创建一个 MyGraphicsView 对象,并显示它
view = MyGraphicsView()
view.show()
```
这将在 QGraphicsView 中添加一个 QLineEdit 和一个软键盘,你可以通过单击 QLineEdit 输入文本,通过 Tab 键切换焦点。