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该代码使用 QLineEdit
和 QPushButton
创建一个对话框。单击按钮时,我希望 QLineEdit 变成进度条,显示按下按钮触发的进程的进度。该过程完成后,QLineEdit
应该恢复到正常的“LineEdit”外观。如何实现这一目标?
这是 Photoshop 编辑的想法:
from PyQt4 import QtCore, QtGui
import time
class Dialog(QtGui.QDialog):
def __init__(self, parent=None):
QtGui.QDialog .__init__(self, parent)
mainLayout = QtGui.QVBoxLayout()
lineEdit = QtGui.QLineEdit('ITEM 001')
mainLayout.addWidget(lineEdit)
button = QtGui.QPushButton('Push Button')
button.clicked.connect(self.buttonClicked)
mainLayout.addWidget(button)
self.setLayout(mainLayout)
def buttonClicked(self):
print 'button clicked'
for i in range(3):
time.sleep(1)
print '...processing %s'%i
if __name__ == '__main__':
app = QtGui.QApplication([])
window = Dialog()
window.resize(300, 50)
window.show()
app.exec_()
最佳答案
在 PyQt4 中,QLinearGradient
获得水平方向。而 PySide 似乎将其处理为垂直渐变。该代码创建一个 QLineEdit
,其背景颜色通过 palette.setBrush(QPalette.Base, QBrush(QLinearGradient))
设置。按下按钮会将进度条值提高 10%。
from PyQt4 import QtCore, QtGui
import time
class Dialog(QtGui.QDialog):
value = 0.001
def __init__(self, parent=None):
QtGui.QDialog .__init__(self, parent)
mainLayout = QtGui.QVBoxLayout()
self.lineedit = QtGui.QLineEdit()
self.setValues()
mainLayout.addWidget(self.lineedit)
button = QtGui.QPushButton('Calculate')
button.clicked.connect(self.buttonClicked)
mainLayout.addWidget(button)
self.setLayout(mainLayout)
def setValues(self):
self.lineedit.setText('progress %s'%self.value)
palette = self.lineedit.palette()
QRectF = QtCore.QRectF(self.lineedit.rect())
gradient = QtGui.QLinearGradient(QRectF.topLeft(), QRectF.topRight())
gradient.setColorAt(self.value-0.001, QtGui.QColor('#f99e41'))
gradient.setColorAt(self.value, QtGui.QColor('#ffffff'))
gradient.setColorAt(self.value+0.001, QtGui.QColor('#ffffff'))
palette.setBrush(QtGui.QPalette.Base, QtGui.QBrush(gradient))
self.lineedit.setPalette(palette)
def buttonClicked(self):
if self.value >0.9:
self.value = 0.001
else:
self.value=self.value+0.1
self.setValues()
time.sleep(1)
if __name__ == '__main__':
app = QtGui.QApplication([])
window = Dialog()
window.resize(300, 50)
window.show()
app.exec_()
对于 PySide,渐变可能是水平的:
import PySide.QtCore as QtCore
import PySide.QtGui as QtGui
class Dialog(QtGui.QDialog):
value = 1.00
def __init__(self, parent=None):
QtGui.QDialog .__init__(self, parent)
mainLayout = QtGui.QVBoxLayout()
self.lineedit = QtGui.QLineEdit()
self.setValues()
mainLayout.addWidget(self.lineedit)
button = QtGui.QPushButton('Calculate')
button.clicked.connect(self.buttonClicked)
mainLayout.addWidget(button)
self.setLayout(mainLayout)
def setValues(self):
self.lineedit.setText('progress %s'%self.value)
palette = self.lineedit.palette()
QRectF = QtCore.QRectF(self.lineedit.rect())
gradient = QtGui.QLinearGradient(QRectF.topLeft(), QRectF.topRight())
gradient.setColorAt(self.value-0.001, QtGui.QColor('#ffffff'))
gradient.setColorAt(self.value, QtGui.QColor('#f99e41'))
gradient.setColorAt(self.value+0.001, QtGui.QColor('#f99e41'))
palette.setBrush(QtGui.QPalette.Base, QtGui.QBrush(gradient))
self.lineedit.setPalette(palette)
def buttonClicked(self):
if self.value <0.1:
self.value = 1.00
else:
self.value=self.value-0.1
self.setValues()
if __name__ == '__main__':
app = QtGui.QApplication([])
window = Dialog()
window.resize(300, 50)
window.show()
app.exec_()
关于python - 如何将QLineEdit背景变成进度条,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36972132/
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