问题描述

我是 QML 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

从 PyQt5.QtWidgets 导入 QApplication, QMainWindow从 PyQt5.QtCore 导入 QUrl从 PyQt5.QtQuick 导入 QQuickView如果 __name__ == "__main__":应用程序 = QApplication(sys.argv)视图 = QQuickView()view.setSource(QUrl('basic.qml'))视图.show()sys.exit(app.exec_())

还有basic.qml:

导入QtQuick 2.0导入 QtQuick.Controls 2.0导入 QtQuick.Controls.Material 2.0导入 QtQuick.Controls.Material 2.3长方形 {宽度:600；高度:150；颜色:Material.color(Material.Red)按钮 {文本:qsTr(按钮")突出显示:真材质.背景:材质.蓝绿色}}

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.我已经尝试过使用窗格和其他元素，但仍然没有.

这是我得到代码的地方:

解决方案

你的情况有两种可能的解决方案:

<小时>

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:

导入系统从 PyQt5.QtGui 导入 QGuiApplication从 PyQt5.QtCore 导入 QUrl从 PyQt5.QtQuick 导入 QQuickView如果 __name__ == "__main__":sys.argv += ['--style', 'material']应用程序 = QGuiApplication(sys.argv)视图 = QQuickView()view.setSource(QUrl('basic.qml'))视图.show()sys.exit(app.exec_())

选项2:通过os.environ()添加样式:

导入操作系统导入系统从 PyQt5.QtGui 导入 QGuiApplication从 PyQt5.QtCore 导入 QUrl从 PyQt5.QtQuick 导入 QQuickView如果 __name__ == "__main__":应用程序 = QGuiApplication(sys.argv)os.environ["QT_QUICK_CONTROLS_STYLE"] = "材料"视图 = QQuickView()view.setSource(QUrl('basic.qml'))视图.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

<代码>;可以编辑此文件以更改应用程序的样式;有关详细信息，请参阅文档中的样式化 Qt Quick Controls 2:;http://doc.qt.io/qt-5/qtquickcontrols2-styles.html[控制]样式=材质

然后创建一个resource.qrc:

resource.qrc:

<qresource 前缀="/"><文件>qtquickcontrols2.conf</文件></qresource></RCC>

然后你必须将.qrc转换为.py:

pyrcc5 resource.qrc -o resource_rc.py

最后将resource_rc.py文件导入到main.py中

ma​​in.py:

从 PyQt5.QtGui 导入 QGuiApplication从 PyQt5.QtCore 导入 QUrl从 PyQt5.QtQuick 导入 QQuickView导入系统导入资源_rc如果 __name__ == "__main__":应用程序 = QGuiApplication(sys.argv)视图 = QQuickView()view.setSource(QUrl('basic.qml'))视图.show()sys.exit(app.exec_())

<小时>

1. 或者不使用 Material 风格，只通过调色板来使用它们的颜色:

<小时>

导入QtQuick 2.0导入 QtQuick.Controls 2.3导入 QtQuick.Controls.Material 2.3长方形 {宽度:600；高度:150；颜色:Material.color(Material.Red)按钮 {文本:qsTr(按钮")突出显示:真调色板.dark:Material.color(Material.Teal)}}

I'm new to QML and I'm trying to change the background color of a button but nothing seems to work. Here's the python code: 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_())

And the 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
    }
}

Here is how it looks, the button isn't 'Material.Teal' and no matter what color I try it still doesn't work. I've tried it with Pane and other elements but still nothing.

Here's where I got the code: http://doc.qt.io/qt-5/qtquickcontrols2-material.html#material-primary-attached-prop

I've tried it with other styles/methods like pallete (orFusion): 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")
        }
    }
}

解决方案

In your case there are 2 possible solutions:

---

1. If you want to use Material.background you must establish that the style you are going to use is Material, and to do so you can choose one of the following options:

option 1: add the style through sys.argv:

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_())

option 2: add the style through os.environ():

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_())

option 3: create a qtquickcontrols2.conf file and load it into the application using a qresource:

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

then a resource.qrc is created:

resource.qrc:

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

Then you must convert the .qrc to .py:

pyrcc5 resource.qrc -o resource_rc.py

and at the end the resource_rc.py file is imported into the 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_())

---

2. or not use the Material style, and only use their colors through the use of palette:

---

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)
    }
}