Question

我正在玩pyqt4。我想在其上创建custom widget和draw一些矩形。我已经在QCanvas上使用了类似的内容，但现在我只想让它在我的自定义类中创建一个对象时绘制我的rectangles ...

self.IND = [] contains colors (QColor)

class labelBOX(QtGui.QWidget):
    def __init__(self, parent, X,Y, holes):
        super(labelBOX , self).__init__(parent)
        self.gridL = QtGui.QGridLayout(self)
        self.setGeometry(X,Y, 50, 100)
        self.setWindowTitle("LEGEND")
        self.HOLES = holes
        self.LBL = []
        self.setLayout(self.gridL)
        self.i = 0
        self.j = 0
        self.genLBL()
        self.IND = []
        self.qp = QtGui.QPainter()
        self.genIND(self.qp)

        self.show()


    """
    Generate labels
    """
    def genLBL(self):
        for k in range(len(self.HOLES)):
    self.LBL.append(QtGui.QLabel(QtCore.QString(self.HOLES[k].getNAME())))

for k in range(len(self.LBL)):
    self.gridL.addWidget(self.LBL[k])


    """
    Generate indicators
    """
    def genIND(self, qp):
        self.i = 0
        self.j = 1
        for k in range(len(self.HOLES)):
            self.IND.append(self.HOLES[k].getCOLOR())

        for k in range(len(self.IND)):
                    qp.setBrush(self.IND[k])
        self.gridL.addWidget(qp.fillRect(10,10,50,50, ))






class OTHERCLASS():
    ....
    self.WIDGET = labelBOX(self, 550, 350, dummyLOAD)
    ....

Answer 1

如果要在自定义小部件上手动绘制，则可以覆盖paintEvent或使用绝对定位并将矩形放置在所需的位置。 paintEvent可能会更好，但它更复杂。 http://zetcode.com/gui/pyqt4/drawing/示例和http://pyqt.sourceforge.net/Docs/PyQt4/qpainter.html是类引用。我在下面写了一个例子。

def paintEvent(self, event):
    super().paintEvent(event)

    painter = QtGui.QPainter()
    painter.begin(self)

    rect = self.rect()

    gradient = QtGui.QRadialGradient(rect.center(), rect.width())
    gradient.setColorAt(0.0, QtGui.QColor(255, 255, 255, 10)
    gradient.setColorAt(0.90, QtGui.QColor(0, 0, 0, 255))
    gradient.setColorAt(0.98, QtGui.QColor(0, 0, 0, 100))

    painter.setPen(QtGui.QColor(0, 0, 0) # Pen works on the border
    painter.setBrush(grad) # Main color

    # Draw the rectangle
    painter.drawRect(rect) # Try to keep your rectangle within the widget area

    painter.end()
    event.accept()

在没有事件的情况下绘制自定义小部件

1 个答案: