从传递自定义小部件值的QAction发出信号
从传递自定义小部件值的QAction发出信号
提问于 2018-06-05 04:03:16
我已经使用自定义小部件创建了一个简单的菜单。如何使menu QAction发出所点击样本的颜色值？每个色样都包含一个名为“color”的属性。如果用户单击'Reset‘，我希望发出的值为'None’
我试图重载触发的信号来传递单击的样例的颜色，但也不起作用。
import sys
from PySide import QtGui, QtCore
class QColorSwatch(QtGui.QPushButton):
colorClicked = QtCore.Signal(object)
colorChanged = QtCore.Signal(object)
def __init__(self, *args, **kwargs):
super(QColorSwatch, self).__init__(*args, **kwargs)
self.setFixedWidth(18)
self.setFixedHeight(18)
self.setAutoFillBackground(True)
self._color = None
self.color = QtGui.QColor(0,0,0)
self.pressed.connect(self.color_clicked)
@property
def color(self):
return self._color
@color.setter
def color(self, value):
self._color = value
self.setIconSize(self.size())
pixmap = QtGui.QPixmap(self.size())
pixmap.fill(QtCore.Qt.black)
painter = QtGui.QPainter(pixmap)
painter.setBrush(QtGui.QColor(self.color))
painter.setPen(QtGui.QPen(QtCore.Qt.white, 1, QtCore.Qt.SolidLine, QtCore.Qt.RoundCap, QtCore.Qt.RoundJoin))
painter.drawRect(1,1,self.size().width()-3,self.size().height()-3)
painter.end()
self.setIcon(pixmap)
self.colorChanged.emit(value)
def color_clicked(self):
self.colorClicked.emit(self.color)
class ColorFilters(QtGui.QWidget):
def __init__(self, action):
super(ColorFilters,self).__init__()
self.action = action
self.ui_any_color = QtGui.QLabel('Reset')
self.ui_swatch_01 = QColorSwatch()
self.ui_swatch_01.color = QtGui.QColor(255,0,0)
self.ui_swatch_02 = QColorSwatch()
self.ui_swatch_02.color = QtGui.QColor(0,255,0)
self.ui_swatch_03 = QColorSwatch()
self.ui_swatch_03.color = QtGui.QColor(0,0,255)
lay_main = QtGui.QGridLayout()
lay_main.setSpacing(5)
lay_main.setContentsMargins(5,5,5,5)
lay_main.addWidget(self.ui_any_color,0,0,1,4)
lay_main.addWidget(self.ui_swatch_01,1,0)
lay_main.addWidget(self.ui_swatch_02,1,1)
lay_main.addWidget(self.ui_swatch_03,1,2)
self.setLayout(lay_main)
# connections
self.ui_swatch_01.colorClicked.connect(self.clicked_swatch)
self.ui_swatch_02.colorClicked.connect(self.clicked_swatch)
self.ui_swatch_03.colorClicked.connect(self.clicked_swatch)
def mouseReleaseEvent(self,e):
self.action.trigger()
def clicked_swatch(self, col):
col = self.sender().color
self.action.trigger()
class Example(QtGui.QMainWindow):
def __init__(self):
super(Example, self).__init__()
colAction = QtGui.QWidgetAction(self)
ql = ColorFilters(colAction)
colAction.setDefaultWidget(ql)
colAction.triggered.connect(self.clicked_color)
menubar = self.menuBar()
fileMenu = menubar.addMenu('&File')
fileMenu.addAction(colAction)
self.setGeometry(300, 300, 250, 150)
self.setWindowTitle('Menubar')
self.show()
def clicked_color(self):
print 'Clicked'
app = QtGui.QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())回答 1
Stack Overflow用户
回答已采纳
发布于 2018-06-05 05:12:13
它不是尝试使用触发信号，而是创建一个发送该信息的新信号。您还应该知道，一个信号也可以连接到另一个信号，如下所示。
import sys
from PySide import QtGui, QtCore
class QColorSwatch(QtGui.QPushButton):
colorClicked = QtCore.Signal(QtGui.QColor)
colorChanged = QtCore.Signal(object)
def __init__(self, *args, **kwargs):
super(QColorSwatch, self).__init__(*args, **kwargs)
self.setFixedWidth(18)
self.setFixedHeight(18)
self.setAutoFillBackground(True)
self._color = None
self.color = QtGui.QColor(0,0,0)
self.pressed.connect(self.color_clicked)
@property
def color(self):
return self._color
@color.setter
def color(self, value):
self._color = value
self.setIconSize(self.size())
pixmap = QtGui.QPixmap(self.size())
pixmap.fill(QtCore.Qt.black)
painter = QtGui.QPainter(pixmap)
painter.setBrush(QtGui.QColor(self.color))
painter.setPen(QtGui.QPen(QtCore.Qt.white, 1, QtCore.Qt.SolidLine, QtCore.Qt.RoundCap, QtCore.Qt.RoundJoin))
painter.drawRect(1,1,self.size().width()-3,self.size().height()-3)
painter.end()
self.setIcon(pixmap)
self.colorChanged.emit(value)
def color_clicked(self):
self.colorClicked.emit(self.color)
class ColorFilters(QtGui.QWidget):
colorSelected = QtCore.Signal(QtGui.QColor)
def __init__(self, parent=None):
super(ColorFilters, self).__init__(parent)
lay_main = QtGui.QGridLayout(self)
lay_main.setSpacing(5)
lay_main.setContentsMargins(5,5,5,5)
self.ui_any_color = QtGui.QLabel('Reset')
lay_main.addWidget(self.ui_any_color,0,0,1,4)
self.ui_any_color.installEventFilter(self)
for i, color in enumerate((QtGui.QColor(255,0,0), QtGui.QColor(0,255,0), QtGui.QColor(0,0,255))):
ui_swatch = QColorSwatch()
ui_swatch.color = color
lay_main.addWidget(ui_swatch,1,i+1)
ui_swatch.colorClicked.connect(self.colorSelected)
def eventFilter(self, obj, event):
if obj == self.ui_any_color and event.type() == QtCore.QEvent.Type.MouseButtonPress:
self.colorSelected.emit(QtGui.QColor)
return super(ColorFilters, self).eventFilter(obj, event)
class Example(QtGui.QMainWindow):
def __init__(self):
super(Example, self).__init__()
colAction = QtGui.QWidgetAction(self)
ql = ColorFilters(self)
colAction.setDefaultWidget(ql)
ql.colorSelected.connect(self.clicked_color)
menubar = self.menuBar()
fileMenu = menubar.addMenu('&File')
fileMenu.addAction(colAction)
self.setGeometry(300, 300, 250, 150)
self.setWindowTitle('Menubar')
self.show()
def clicked_color(self, color):
if not color.isValid():
print("reset")
else:
print('Clicked', color)
app = QtGui.QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50688002
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