pyqt 通过鼠标单击关闭主 window 中的自定义对话框

Question

问。是否有可能，当用户单击或双击颜色项目时，对话框会自行关闭并且 return 颜色名称下面是工作示例（希望能证明问题）。单击 canvas 区域将弹出颜色对话框。当前用户必须 select 颜色然后点击 'OK' 按钮，当用户点击颜色时意图完成。只是想节省用户时间，一点。

import sys
from PyQt5 import QtCore, QtGui, QtWidgets, uic, QtMultimedia, QtMultimediaWidgets
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

colorsDict = { 'White': '0xFFFFFF','DarkGray': '0xA9A9A9','DarkSlateGray': '0x2F4F4F','LightSlateGray': '0x778899','DimGray': '0x696969','Gray': '0x808080','SlateGray': '0x708090','Black': '0x000000','DarkRed': '0x8B0000','Darkorange': '0xFF8C00','FireBrick': '0xB22222','Crimson': '0xDC143C','Salmon': '0xFA8072'}
def hexToQColor (h):
    h = h.lstrip('#') # general usage safety
    # h = h.lstrip('0x') # my use case
    if h.find('0x') == 0:
        h = h.split('0x')[1]
    rgb = tuple(int(h[i:i+2], 16) for i in (0, 2 ,4))
    return QColor(rgb[0],rgb[1],rgb[2])
class FfmpegColorDialog(QDialog):
    """
        Custom FFMPEG Color Picker class
    """
    resized = QtCore.pyqtSignal()
    def __init__(self, parent=None):
        super(FfmpegColorDialog, self).__init__(parent)
        # self.ui = uic.loadUi('ui/ffmpeg_colors.ui', self)
        self.setWindowTitle("FFMPEG Color Picker")
        self.listWidget = QListWidget()
        self.readPrefs()
        self.listWidget.setFlow(QListView.LeftToRight)
        self.listWidget.setResizeMode(QListView.Adjust)
        self.listWidget.setGridSize(QSize(32, 32))
        self.listWidget.setSpacing(5)
        self.listWidget.setViewMode(QListView.IconMode)
        self.listWidget.itemClicked.connect(self.itemClicked)
        self.listWidget.itemDoubleClicked.connect(self.itemDoubleClicked)
        layout = QVBoxLayout(self)
        layout.addWidget(self.listWidget)

        # OK and Cancel buttons
        buttons = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel, Qt.Horizontal, self)
        buttons.accepted.connect(self.accept)
        buttons.rejected.connect(self.reject)
        layout.addWidget(buttons)

    def readPrefs(self):
        """
        reading preferences from module for Data in UI
        """
        for each in colorsDict.keys():
            item = colorsDict[each]
            listItem = QListWidgetItem()
            listItem.setToolTip(each)

            listItem.setSizeHint(QSize(30, 30))
            color = hexToQColor(item)
            listItem.setBackground(QBrush(color))
            self.listWidget.addItem(listItem)
    def itemClicked(self,item):
        self.listWidget.setCurrentItem(item)
        # self.accept()
    def itemDoubleClicked(self,item):
        c = item.background().color()
        self.listWidget.setCurrentItem(item)
        result = self.exec_()
        return(c,result==QDialog.Accepted)

    def getResults(self):
        if self.exec_() == QDialog.Accepted:
            item = self.listWidget.currentItem()
            # print (item.toolTip())
            return ( item.toolTip())
        else:
            return None
    def getUserColor(self):
        return (self.listWidget.currentItem().toolTip())
    @staticmethod
    def getFinalColor(parent=None):
        dialog = FfmpegColorDialog(parent)
        result = dialog.exec_()
        color = dialog.getUserColor()
        return(color,result==QDialog.Accepted)
class MainWindow(QMainWindow):

    central_widget = None
    layout_container = None

    def __init__(self):
        super(MainWindow, self).__init__()
        self.central_widget = QWidget()
        self.layout_container = QVBoxLayout()
        self.central_widget.setLayout(self.layout_container)
        self.setCentralWidget(self.central_widget)
        self.layout_container.addWidget(GraphicsView())

class GraphicsView(QGraphicsView):

    def __init__(self):
        super(GraphicsView, self).__init__()
        self.scene = QGraphicsScene()
        self.setScene(self.scene)
        self.text = None
        self.createText()

    def createText(self):
        self.text = QGraphicsTextItem()
        font = QFont()
        font.setPixelSize(40)
        self.text.setFont(font)
        self.text.setPlainText("Sample Text To Test")
        self.scene.addItem(self.text)
    def mousePressEvent(self, event):
        r,ok = FfmpegColorDialog.getFinalColor()
        hc = colorsDict[r]
        rgb = hexToQColor(hc)
        self.text.setDefaultTextColor(rgb)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    # dia = FfmpegColorDialog()
    # dia.show()
    mw = MainWindow()
    mw.show()
    sys.exit(app.exec_())

Answer 1

只需将QListWidget的clicked信号连接到FfmpegColorDialog的接受槽即可：

class FfmpegColorDialog(QDialog):
    """
        Custom FFMPEG Color Picker class
    """
    resized = QtCore.pyqtSignal()
    def __init__(self, parent=None):
        super(FfmpegColorDialog, self).__init__(parent)
        # ...
        self.listWidget = QListWidget()
        self.listWidget.clicked.connect(self.accept) # <---
        # ...

pyqt 通过鼠标单击关闭主 window 中的自定义对话框

pyqt closing a custom dialog in main window via mouse click

python

pyqt

qdialog

pyqt5