PyQt QML Material 设计按钮背景不会改变

PyQt QML Material Design button background won't change

我是 QML 的新手,我正在尝试更改按钮的背景颜色,但似乎没有任何效果。 这是 python 代码:import sys

from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtCore import QUrl
from PyQt5.QtQuick import QQuickView


if __name__ == "__main__":

    app = QApplication(sys.argv)

    view = QQuickView()
    view.setSource(QUrl('basic.qml'))
    view.show()

    sys.exit(app.exec_())

和 basic.qml:

import QtQuick 2.0
import QtQuick.Controls 2.0
import QtQuick.Controls.Material 2.0
import QtQuick.Controls.Material 2.3

Rectangle {
    width:600;height:150;
    color: Material.color(Material.Red)
    Button {
        text: qsTr("Button")
        highlighted: true
        Material.background: Material.Teal
    }
}

这是它的外观,按钮不是 'Material.Teal',无论我尝试什么颜色,它仍然不起作用。我已经尝试过使用 Pane 和其他元素,但仍然没有。

这是我获得代码的地方:http://doc.qt.io/qt-5/qtquickcontrols2-material.html#material-primary-attached-prop

我已经用其他 styles/methods 试过它,比如 palette(或 Fusion): https://doc.qt.io/qt-5.10/qml-qtquick-controls2-control.html#palette-prop

Page {
    palette.text: "red"

    Column {
        Label {
            text: qsTr("This will use red color...")
        }

        Switch {
            text: qsTr("... and so will this")
        }
    }
}

检查此部分的样式和颜色: http://doc.qt.io/qt-5/qml-qtquick-controls-styles-buttonstyle.html

对于您的情况,有 2 种可能的解决方案:


  1. 如果您想使用 Material.background,您必须确定您要使用的样式是 Material,为此您可以选择以下选项之一:

选项1:通过sys.argv添加样式:

import sys

from PyQt5.QtGui import QGuiApplication
from PyQt5.QtCore import QUrl
from PyQt5.QtQuick import QQuickView


if __name__ == "__main__":
    sys.argv += ['--style', 'material']
    app = QGuiApplication(sys.argv)

    view = QQuickView()
    view.setSource(QUrl('basic.qml'))
    view.show()

    sys.exit(app.exec_())

选项2:通过os.environ()添加样式:

import os
import sys

from PyQt5.QtGui import QGuiApplication
from PyQt5.QtCore import QUrl
from PyQt5.QtQuick import QQuickView


if __name__ == "__main__":
    app = QGuiApplication(sys.argv)
    os.environ["QT_QUICK_CONTROLS_STYLE"] = "Material"

    view = QQuickView()
    view.setSource(QUrl('basic.qml'))
    view.show()

    sys.exit(app.exec_())

选项 3:创建一个 qtquickcontrols2.conf 文件并使用 qresource 将其加载到应用程序中:

qtquickcontrols2.conf

; This file can be edited to change the style of the application
; See Styling Qt Quick Controls 2 in the documentation for details:
; http://doc.qt.io/qt-5/qtquickcontrols2-styles.html

[Controls]
Style=Material

然后创建了一个resource.qrc

resource.qrc:

<RCC>
    <qresource prefix="/">
        <file>qtquickcontrols2.conf</file>
    </qresource>
</RCC>

然后你必须将.qrc 转换为.py:

pyrcc5 resource.qrc -o resource_rc.py

最后 resource_rc.py 文件被导入 main.py

main.py:

from PyQt5.QtGui import QGuiApplication
from PyQt5.QtCore import QUrl
from PyQt5.QtQuick import QQuickView

import sys
import resource_rc

if __name__ == "__main__":
    app = QGuiApplication(sys.argv)
    view = QQuickView()

    view.setSource(QUrl('basic.qml'))
    view.show()
    sys.exit(app.exec_())

  1. 或者不使用 Material 样式,只通过使用调色板来使用它们的颜色:

import QtQuick 2.0
import QtQuick.Controls 2.3
import QtQuick.Controls.Material 2.3

Rectangle {
    width:600;height:150;
    color: Material.color(Material.Red)
    Button {
        text: qsTr("Button")
        highlighted: true
        palette.dark: Material.color(Material.Teal)
    }
}