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使用 PyQt5/Pyside2 設置一個重復的 SVG 圖案作為主窗口/Qwidget 背景

[英]Using PyQt5/Pyside2 to set a repeating SVG pattern as main window/Qwidget background

我已經通過http://www.heropatterns.com/生成了 SVG css 代碼,我試圖將它用作我的主窗口/Qwidget 的背景。 我希望背景隨着窗口變大或縮小而調整大小。 我嘗試調用 Form.setStyleSheet() 並將生成的 css 作為參數傳入,但我只得到模式中的兩種顏色之一(背景顏色)。 將 SVG 顯示為 QWidget 主窗口的背景並查看完整模式的正確方法是什么? 我知道QSvgRenderer存在,但是,一旦我創建了 QSvgRenderer 對象,我就不確定從那里開始使 SVG 成為可調整大小的背景。 我被告知使用background-repeat: repeat; 但是,樣式表中的屬性並沒有改變任何東西。

這是我寫的最小、完整和可驗證的示例:

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(400, 300)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout(Form)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.horizontalLayout_2.addLayout(self.horizontalLayout)
        self.retranslateUi(Form)
        Form.setStyleSheet("""background-repeat: repeat; background-color: #000000;
background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='49' viewBox='0 0 28 49'%3E%3Cg fill-rule='evenodd'%3E%3Cg id='hexagons' fill='%23b0b0b0' fill-opacity='0.4' fill-rule='nonzero'%3E%3Cpath d='M13.99 9.25l13 7.5v15l-13 7.5L1 31.75v-15l12.99-7.5zM3 17.9v12.7l10.99 6.34 11-6.35V17.9l-11-6.34L3 17.9zM0 15l12.98-7.5V0h-2v6.35L0 12.69v2.3zm0 18.5L12.98 41v8h-2v-6.85L0 35.81v-2.3zM15 0v7.5L27.99 15H28v-2.31h-.01L17 6.35V0h-2zm0 49v-8l12.99-7.5H28v2.31h-.01L17 42.15V49h-2z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");""")
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        Form.setWindowTitle(QtWidgets.QApplication.translate("Form", "Form", None, -1))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Form = QtWidgets.QWidget()
    ui = Ui_Form()
    ui.setupUi(Form)
    Form.show()
    sys.exit(app.exec_())

表單當前的外觀:

在此處輸入圖片說明

表單的外觀:

在此處輸入圖片說明

SVG 模式的 XML 表示

<svg xmlns="http://www.w3.org/2000/svg" width="28" height="49" viewBox="0 0 28 49"><g fill-rule="evenodd"><g id="hexagons" fill="#000" fill-rule="nonzero"><path d="M13.99 9.25l13 7.5v15l-13 7.5L1 31.75v-15l12.99-7.5zM3 17.9v12.7l10.99 6.34 11-6.35V17.9l-11-6.34L3 17.9zM0 15l12.98-7.5V0h-2v6.35L0 12.69v2.3zm0 18.5L12.98 41v8h-2v-6.85L0 35.81v-2.3zM15 0v7.5L27.99 15H28v-2.31h-.01L17 6.35V0h-2zm0 49v-8l12.99-7.5H28v2.31h-.01L17 42.15V49h-2z"/></g></g></svg>

更改按鈕背景的示例:

from PySide2 import QtCore, QtGui, QtWidgets

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(400, 300)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout(Form)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.horizontalLayout_2.addLayout(self.horizontalLayout)

        self.Start_Stop_button = QtWidgets.QPushButton(Form)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.Start_Stop_button.sizePolicy().hasHeightForWidth())
        self.Start_Stop_button.setSizePolicy(sizePolicy)
        self.Start_Stop_button.setMinimumSize(QtCore.QSize(0, 0))
        self.Start_Stop_button.setBaseSize(QtCore.QSize(0, 0))
        self.Start_Stop_button.setIconSize(QtCore.QSize(16, 16))
        self.Start_Stop_button.setFlat(False)
        self.Start_Stop_button.setObjectName("Start_Stop_button")
        contents = b"<svg xmlns='http://www.w3.org/2000/svg' width='28' height='49' viewBox='0 0 28 49'><g fill-rule='evenodd'><g id='hexagons' fill='#b0b0b0' fill-opacity='0.4' fill-rule='nonzero'><path d='M13.99 9.25l13 7.5v15l-13 7.5L1 31.75v-15l12.99-7.5zM3 17.9v12.7l10.99 6.34 11-6.35V17.9l-11-6.34L3 17.9zM0 15l12.98-7.5V0h-2v6.35L0 12.69v2.3zm0 18.5L12.98 41v8h-2v-6.85L0 35.81v-2.3zM15 0v7.5L27.99 15H28v-2.31h-.01L17 6.35V0h-2zm0 49v-8l12.99-7.5H28v2.31h-.01L17 42.15V49h-2z'/></g></g></svg>"
        file = QtCore.QTemporaryFile(Form)
        if file.open():
            file.write(contents)
            file.flush()
            Form.setStyleSheet("""background-color: #000000;
                                  background-image: url(%s);""" % file.fileName())

        #Form.show()
        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        Form.setWindowTitle(QtWidgets.QApplication.translate("Form", "Form", None, -1))
        self.Start_Stop_button.setText(QtWidgets.QApplication.translate("Form", "Start", None, -1))

class Widget(QtWidgets.QWidget, Ui_Form):
    def __init__(self, parent=None):
        super(Widget, self).__init__(parent)
        self.setupUi(self)

    def paintEvent(self, event):
        opt = QtWidgets.QStyleOption()
        opt.init(self)
        painter = QtGui.QPainter(self)
        self.style().drawPrimitive(QtWidgets.QStyle.PE_Widget, opt, painter, self)

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = Widget()
    w.show()
    sys.exit(app.exec_())

QSS 不支持這種類型的 url,解決方法是將內容保存在應用程序關閉時刪除的臨時文件中,為此我們使用 QTemporaryFile。

另一方面,url 具有以下格式: data:image/svg+xml,<CONTENT> ,這是您應該使用的內容。

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(400, 300)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout(Form)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.horizontalLayout_2.addLayout(self.horizontalLayout)
        self.retranslateUi(Form)

        contents = b"<svg xmlns='http://www.w3.org/2000/svg' width='28' height='49' viewBox='0 0 28 49'><g fill-rule='evenodd'><g id='hexagons' fill='#b0b0b0' fill-opacity='0.4' fill-rule='nonzero'><path d='M13.99 9.25l13 7.5v15l-13 7.5L1 31.75v-15l12.99-7.5zM3 17.9v12.7l10.99 6.34 11-6.35V17.9l-11-6.34L3 17.9zM0 15l12.98-7.5V0h-2v6.35L0 12.69v2.3zm0 18.5L12.98 41v8h-2v-6.85L0 35.81v-2.3zM15 0v7.5L27.99 15H28v-2.31h-.01L17 6.35V0h-2zm0 49v-8l12.99-7.5H28v2.31h-.01L17 42.15V49h-2z'/></g></g></svg>"
        file = QtCore.QTemporaryFile(Form)
        if file.open():
            file.write(contents)
            file.flush()
            Form.setStyleSheet("""background-color: #000000;
                                  background-image: url(%s);""" % file.fileName())
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        Form.setWindowTitle(QtWidgets.QApplication.translate("Form", "Form", None, -1))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Form = QtWidgets.QWidget()
    ui = Ui_Form()
    ui.setupUi(Form)
    Form.show()
    sys.exit(app.exec_())

在此處輸入圖片說明


看起來PySide2有點特別,看起來更像Qt,因為這個問題在C++中等待它而不是在Python中。 對於支持QSS的小部件,應該使用QStyle實現paintEvent但為此我們必須創建類小部件,因為類Ui_Form不是小部件,它只是一個用於填充小部件的類。 下面我展示了可行的代碼。

from PySide2 import QtCore, QtGui, QtWidgets

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(400, 300)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout(Form)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.horizontalLayout_2.addLayout(self.horizontalLayout)
        self.retranslateUi(Form)

        contents = b"<svg xmlns='http://www.w3.org/2000/svg' width='28' height='49' viewBox='0 0 28 49'><g fill-rule='evenodd'><g id='hexagons' fill='#b0b0b0' fill-opacity='0.4' fill-rule='nonzero'><path d='M13.99 9.25l13 7.5v15l-13 7.5L1 31.75v-15l12.99-7.5zM3 17.9v12.7l10.99 6.34 11-6.35V17.9l-11-6.34L3 17.9zM0 15l12.98-7.5V0h-2v6.35L0 12.69v2.3zm0 18.5L12.98 41v8h-2v-6.85L0 35.81v-2.3zM15 0v7.5L27.99 15H28v-2.31h-.01L17 6.35V0h-2zm0 49v-8l12.99-7.5H28v2.31h-.01L17 42.15V49h-2z'/></g></g></svg>"
        file = QtCore.QTemporaryFile(Form)
        if file.open():
            file.write(contents)
            file.flush()
            Form.setStyleSheet("""background-color: #000000;
                                  background-image: url(%s);""" % file.fileName())

        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        Form.setWindowTitle(QtWidgets.QApplication.translate("Form", "Form", None, -1))


class Widget(QtWidgets.QWidget, Ui_Form):
    def __init__(self, parent=None):
        super(Widget, self).__init__(parent)
        self.setupUi(self)

    def paintEvent(self, event):
        opt = QtWidgets.QStyleOption()
        opt.init(self)
        painter = QtGui.QPainter(self)
        self.style().drawPrimitive(QtWidgets.QStyle.PE_Widget, opt, painter, self)

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = Widget()
    w.show()
    sys.exit(app.exec_())

加:

QSS 具有應用以下鏈接中指示的樣式的規則:

在您的情況下,它僅適用於當前小部件,您必須使用objectName

在此處輸入圖片說明

Form.setStyleSheet("""QWidget#Form{background-color: #000000;
                      background-image: url(%s);}""" % file.fileName())

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