我对PySide编码非常陌生，并且遇到了麻烦。我正在构建一个小控件，该控件在屏幕上绘制标签。
我已经开始了冰箱磁铁的例子。我想知道如何从对话框中更新冷藏柜的颜色。
谢谢。
from PySide import QtCore, QtGui
import fridgemagnets_rc
class PropertyChangeWindow(QtGui.QDialog):
" Property Change Window"
def __init__(self, magnet_text, parent=None):
super(PropertyChangeWindow, self).__init__(parent)
self.block = magnet_text
self.setWindowTitle("Properties of " + magnet_text)
self.setMinimumSize(160, 160)
buttonBox = QtGui.QDialogButtonBox(QtGui.QDialogButtonBox.Ok | QtGui.QDialogButtonBox.Cancel)
buttonBox.accepted.connect(self.accept)
buttonBox.rejected.connect(self.reject)
mainLayout = QtGui.QVBoxLayout()
mainLayout.addWidget(buttonBox)
self.setLayout(mainLayout)
def accept(self):
self.hide()
print ("Change Magnet Color to Green")
print ("Redraw all Magnets")
class DragLabel(QtGui.QLabel):
def __init__(self, text, parent):
super(DragLabel, self).__init__(parent)
self.text = text
metric = QtGui.QFontMetrics(self.font())
size = metric.size(QtCore.Qt.TextSingleLine, text)
image = QtGui.QImage(size.width() + 12, size.height() + 12,
QtGui.QImage.Format_ARGB32_Premultiplied)
image.fill(QtGui.qRgba(0, 0, 0, 0))
font = QtGui.QFont()
font.setStyleStrategy(QtGui.QFont.ForceOutline)
painter = QtGui.QPainter()
painter.begin(image)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
painter.setBrush(QtCore.Qt.blue)
painter.drawRoundedRect(QtCore.QRectF(0.1, 0.1, image.width()-1,
image.height()-1), 25, 25, QtCore.Qt.RelativeSize)
painter.setFont(font)
painter.setBrush(QtCore.Qt.black)
painter.drawText(QtCore.QRect(QtCore.QPoint(6, 6), size),
QtCore.Qt.AlignCenter, text)
painter.end()
self.setPixmap(QtGui.QPixmap.fromImage(image))
self.labelText = text
def mousePressEvent(self, event):
itemData = QtCore.QByteArray()
dataStream = QtCore.QDataStream(itemData, QtCore.QIODevice.WriteOnly)
dataStream << QtCore.QByteArray(str(self.labelText)) << QtCore.QPoint(event.pos() - self.rect().topLeft())
mimeData = QtCore.QMimeData()
mimeData.setData('application/x-fridgemagnet', itemData)
mimeData.setText(self.labelText)
drag = QtGui.QDrag(self)
drag.setMimeData(mimeData)
drag.setHotSpot(event.pos() - self.rect().topLeft())
drag.setPixmap(self.pixmap())
self.hide()
if drag.exec_(QtCore.Qt.MoveAction | QtCore.Qt.CopyAction, QtCore.Qt.CopyAction) == QtCore.Qt.MoveAction:
self.close()
else:
self.show()
def mouseReleaseEvent(self, event):
if self._clickevent == "Single Click":
QtCore.QTimer.singleShot(400, self.performSingleClickAction)
else:
self._clickevent = "Double Click"
def mouseDoubleClickEvent(self, event):
self._clickevent = "Double Click"
self.new_window = PropertyChangeWindow(self.text)
self.new_window.show()
class DragWidget(QtGui.QWidget):
def __init__(self, parent=None):
super(DragWidget, self).__init__(parent)
dictionaryFile = QtCore.QFile(':/dictionary/words.txt')
dictionaryFile.open(QtCore.QFile.ReadOnly)
x = 5
y = 5
for word in QtCore.QTextStream(dictionaryFile).readAll().split():
wordLabel = DragLabel(word, self)
wordLabel.move(x, y)
wordLabel.show()
x += wordLabel.width() + 2
if x >= 245:
x = 5
y += wordLabel.height() + 2
newPalette = self.palette()
newPalette.setColor(QtGui.QPalette.Window, QtCore.Qt.white)
self.setPalette(newPalette)
self.setMinimumSize(400, max(200, y))
self.setWindowTitle("Fridge Magnets")
self.setAcceptDrops(True)
def dragEnterEvent(self, event):
if event.mimeData().hasFormat('application/x-fridgemagnet'):
if event.source() in self.children():
event.setDropAction(QtCore.Qt.MoveAction)
event.accept()
else:
event.acceptProposedAction()
elif event.mimeData().hasText():
event.acceptProposedAction()
else:
event.ignore()
dragMoveEvent = dragEnterEvent
def dropEvent(self, event):
if event.mimeData().hasFormat('application/x-fridgemagnet'):
mime = event.mimeData()
itemData = mime.data('application/x-fridgemagnet')
dataStream = QtCore.QDataStream(itemData, QtCore.QIODevice.ReadOnly)
text = QtCore.QByteArray()
offset = QtCore.QPoint()
dataStream >> text >> offset
try:
# Python v3.
text = str(text, encoding='latin1')
except TypeError:
# Python v2.
text = str(text)
newLabel = DragLabel(text, self)
newLabel.move(event.pos() - offset)
newLabel.show()
if event.source() in self.children():
event.setDropAction(QtCore.Qt.MoveAction)
event.accept()
else:
event.acceptProposedAction()
elif event.mimeData().hasText():
pieces = event.mimeData().text().split()
position = event.pos()
for piece in pieces:
newLabel = DragLabel(piece, self)
newLabel.move(position)
newLabel.show()
position += QtCore.QPoint(newLabel.width(), 0)
event.acceptProposedAction()
else:
event.ignore()
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
window = DragWidget()
window.show()
sys.exit(app.exec_())
答案 0 :(得分：0)
每个类都有一个任务，在这种情况下，最好的事情是PropertyChangeWindow不会更改颜色而是返回颜色，并且在DragLabel中使用以前的信息来更改其颜色。
如果您分析初始代码，则会注意到QDataStream存储了相关信息，例如文本和位置，为此我们还必须添加QColor。
考虑上述解决方案是：
from PySide import QtCore, QtGui
import fridgemagnets_rc
class PropertyChangeWindow(QtGui.QDialog):
" Property Change Window"
def __init__(self, magnet_text, parent=None):
super(PropertyChangeWindow, self).__init__(parent)
self.block = magnet_text
self.setWindowTitle("Properties of " + magnet_text)
self.setMinimumSize(160, 160)
buttonBox = QtGui.QDialogButtonBox(
QtGui.QDialogButtonBox.Ok | QtGui.QDialogButtonBox.Cancel
)
buttonBox.accepted.connect(self.accept)
buttonBox.rejected.connect(self.reject)
mainLayout = QtGui.QVBoxLayout()
mainLayout.addWidget(buttonBox)
self.setLayout(mainLayout)
self.m_color = QtGui.QColor()
def accept(self):
self.m_color = QtGui.QColor("green")
super(PropertyChangeWindow, self).accept()
@property
def color(self):
return self.m_color
class DragLabel(QtGui.QLabel):
def __init__(self, text, color=QtGui.QColor(QtCore.Qt.blue), parent=None):
super(DragLabel, self).__init__(parent)
self.labelText = text
self.color = color
self.redraw()
def redraw(self):
metric = QtGui.QFontMetrics(self.font())
size = metric.size(QtCore.Qt.TextSingleLine, self.labelText)
image = QtGui.QImage(
size.width() + 12,
size.height() + 12,
QtGui.QImage.Format_ARGB32_Premultiplied,
)
image.fill(QtGui.qRgba(0, 0, 0, 0))
font = QtGui.QFont()
font.setStyleStrategy(QtGui.QFont.ForceOutline)
painter = QtGui.QPainter()
painter.begin(image)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
painter.setBrush(self.color)
painter.drawRoundedRect(
QtCore.QRectF(0.1, 0.1, image.width() - 1, image.height() - 1),
25,
25,
QtCore.Qt.RelativeSize,
)
painter.setFont(font)
painter.setBrush(QtCore.Qt.black)
painter.drawText(
QtCore.QRect(QtCore.QPoint(6, 6), size),
QtCore.Qt.AlignCenter,
self.labelText,
)
painter.end()
self.setPixmap(QtGui.QPixmap.fromImage(image))
def mousePressEvent(self, event):
itemData = QtCore.QByteArray()
dataStream = QtCore.QDataStream(itemData, QtCore.QIODevice.WriteOnly)
dataStream << QtCore.QByteArray(str(self.labelText)) << QtCore.QPoint(
event.pos() - self.rect().topLeft()
)
dataStream << self.color
mimeData = QtCore.QMimeData()
mimeData.setData("application/x-fridgemagnet", itemData)
mimeData.setText(self.labelText)
drag = QtGui.QDrag(self)
drag.setMimeData(mimeData)
drag.setHotSpot(event.pos() - self.rect().topLeft())
drag.setPixmap(self.pixmap())
self.hide()
if (
drag.exec_(
QtCore.Qt.MoveAction | QtCore.Qt.CopyAction,
QtCore.Qt.CopyAction,
)
== QtCore.Qt.MoveAction
):
self.close()
else:
self.show()
def mouseReleaseEvent(self, event):
if self._clickevent == "Single Click":
QtCore.QTimer.singleShot(400, self.performSingleClickAction)
else:
self._clickevent = "Double Click"
def mouseDoubleClickEvent(self, event):
self._clickevent = "Double Click"
new_window = PropertyChangeWindow(self.labelText)
if new_window.exec_() == QtGui.QDialog.Accepted:
self.color = new_window.color
self.redraw()
class DragWidget(QtGui.QWidget):
def __init__(self, parent=None):
super(DragWidget, self).__init__(parent)
dictionaryFile = QtCore.QFile(":/dictionary/words.txt")
dictionaryFile.open(QtCore.QFile.ReadOnly)
x = 5
y = 5
for word in QtCore.QTextStream(dictionaryFile).readAll().split():
wordLabel = DragLabel(word, parent=self)
wordLabel.move(x, y)
wordLabel.show()
x += wordLabel.width() + 2
if x >= 245:
x = 5
y += wordLabel.height() + 2
newPalette = self.palette()
newPalette.setColor(QtGui.QPalette.Window, QtCore.Qt.white)
self.setPalette(newPalette)
self.setMinimumSize(400, max(200, y))
self.setWindowTitle("Fridge Magnets")
self.setAcceptDrops(True)
def dragEnterEvent(self, event):
if event.mimeData().hasFormat("application/x-fridgemagnet"):
if event.source() in self.children():
event.setDropAction(QtCore.Qt.MoveAction)
event.accept()
else:
event.acceptProposedAction()
elif event.mimeData().hasText():
event.acceptProposedAction()
else:
event.ignore()
dragMoveEvent = dragEnterEvent
def dropEvent(self, event):
if event.mimeData().hasFormat("application/x-fridgemagnet"):
mime = event.mimeData()
itemData = mime.data("application/x-fridgemagnet")
dataStream = QtCore.QDataStream(itemData, QtCore.QIODevice.ReadOnly)
text = QtCore.QByteArray()
offset = QtCore.QPoint()
color = QtGui.QColor()
dataStream >> text >> offset >> color
try:
# Python v3.
text = str(text, encoding="latin1")
except TypeError:
# Python v2.
text = str(text)
newLabel = DragLabel(text, color, self)
newLabel.move(event.pos() - offset)
newLabel.show()
if event.source() in self.children():
event.setDropAction(QtCore.Qt.MoveAction)
event.accept()
else:
event.acceptProposedAction()
elif event.mimeData().hasText():
pieces = event.mimeData().text().split()
position = event.pos()
for piece in pieces:
newLabel = DragLabel(piece, self)
newLabel.move(position)
newLabel.show()
position += QtCore.QPoint(newLabel.width(), 0)
event.acceptProposedAction()
else:
event.ignore()
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
window = DragWidget()
window.show()
sys.exit(app.exec_())