PyQt5 – 在开启状态下为可编辑组合框设置皮肤

下面是Python中使用PyQt5为可编辑组合框设置皮肤的完整攻略。

1. 安装PyQt5

使用pip安装PyQt5：

pip install PyQt5

2. 导入必要的模块

在Python代码中导入必要的PyQt5模块：

from PyQt5.QtWidgets import (QWidget, QComboBox, QApplication, QLabel,
                             QHBoxLayout)
from PyQt5.QtGui import QPixmap

3. 创建样式

使用CSS样式创建组合框的样式，例如：

QComboBox {
    padding: 1px 18px 1px 3px;
    min-width: 6em;
}
QComboBox::drop-down {
    subcontrol-origin: padding;
    subcontrol-position: top right;
    width: 15px;
    border-left-width: 1px;
    border-left-color: darkgray;
    border-left-style: solid;
}
QComboBox::down-arrow {
    image: url(down_arrow.png);
}

4. 设置组合框属性

使用PyQt5代码设置组合框属性：

combo_box = QComboBox()
combo_box.setEditable(True)
combo_box.addItems(["Item 1", "Item 2", "Item 3"])
combo_box.setStyleSheet(css_style)

其中，setEditable(True)方法允许用户在组合框中输入自己的文本。

5. 显示组合框

将组合框添加到QWidget布局，例如：

layout = QHBoxLayout()
layout.addWidget(QLabel("ComboBox:"))
layout.addWidget(combo_box)
main_window = QWidget()
main_window.setLayout(layout)
main_window.show()

示例1

这里是一个简单的示例，在这个示例中，我们将在可编辑组合框中显示不同大小和颜色的字体：

from PyQt5.QtWidgets import (QLabel, QMainWindow, QWidget, QComboBox,
                             QApplication, QHBoxLayout)
import sys


class ComboBoxExample(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.combo_box = QComboBox(self)
        self.combo_box.setEditable(True)
        self.combo_box.addItems(["Small Red Text", "Large Blue Text", "Green Bold Text"])
        self.combo_box.setStyleSheet("QComboBox{font-size: 12px;}")

        self.combo_box.currentIndexChanged.connect(self.selectionChanged)

        layout = QHBoxLayout()
        layout.addWidget(QLabel("Text:"))
        layout.addWidget(self.combo_box)
        central_widget = QWidget(self)
        central_widget.setLayout(layout)
        self.setCentralWidget(central_widget)

        self.setWindowTitle("Combo Box Example")

    def selectionChanged(self):
        style = "QComboBox{font-size: %dpx; color: %s" % (12, "black")
        text = self.combo_box.currentText()
        if "Small" in text:
            font_size = 10
        else:
            font_size = 16
        if "Red" in text:
            color = "red"
        elif "Blue" in text:
            color = "blue"
        else:
            color = "green"
        style = style % (font_size, color)
        self.combo_box.setStyleSheet(style)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    ex = ComboBoxExample()
    ex.show()
    sys.exit(app.exec_())

示例2

这里是另一个示例，在这个示例中，我们将通过使选项卡的图标和文本对齐来修改可编辑组合框的样式：

from PyQt5.QtWidgets import (QLabel, QMainWindow, QWidget, QComboBox,
                             QApplication, QHBoxLayout)
from PyQt5.QtGui import QPixmap
import sys


class IconAlignedComboBox(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.combo_box = QComboBox(self)
        self.setupComboBox()
        layout = QHBoxLayout()
        layout.addWidget(QLabel("Icon and Text Aligned:"))
        layout.addWidget(self.combo_box)
        self.setLayout(layout)

        self.setWindowTitle("IconAlignedComboBox")

    def setupComboBox(self):
        self.combo_box.setEditable(True)

        # Add items with icon and text
        self.combo_box.addItem(QPixmap("icon.png"), "Option 1")
        self.combo_box.addItem(QPixmap("icon.png"), "Option 2")

        # Change alignment of item's text
        self.combo_box.setView(QListView(self.combo_box))
        self.combo_box.setView(QListView(self.combo_box))
        self.combo_box.view().setStyleSheet("QListView::item {padding: 3px;}")
        self.combo_box.view().setTextElideMode(QtCore.Qt.ElideRight)
        font_metrics = QtGui.QFontMetrics(self.combo_box.view().font())
        self.combo_box.view().setMinimumWidth(
            max(
                self.combo_box.iconSize().width() + font_metrics.horizontalAdvance(" ")
                + self.combo_box.view().frameWidth() * 2,
                self.combo_box.width()
            )
        )

    def setComboBoxIcon(self, index, icon):
        self.combo_box.setItemIcon(index, icon)

    def currentText(self):
        return self.combo_box.currentText()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = IconAlignedComboBox()
    ex.show()
    sys.exit(app.exec_())

以上就是Python中使用PyQt5为可编辑组合框设置皮肤的完整攻略，我们通过上述示例代码可以清晰地了解如何使用PyQt5创建自定义组合框。