def draw(self, endPoint_x, endPoint_y):
        painter = QPainter(self.image)

        painter.setPen(QPen(
            self.myPenColor, self.myPenWidth, QtCore.Qt.SolidLine,
            QtCore.Qt.RoundCap, QtCore.Qt.RoundJoin))
        painter.setClipping(True)

        painter.setRenderHint(QPainter.SmoothPixmapTransform, True)
        painter.setRenderHint(QPainter.HighQualityAntialiasing, True)
        painter.setRenderHint(QPainter.Antialiasing, True)
        painter.setCompositionMode(QPainter.CompositionMode())

        if self.tools['circle']:
            x1 = self.firstPoint_x
            y1 = self.firstPoint_y
            x2 = endPoint_x
            y2 = endPoint_y
            painter.drawEllipse(x1, y1, (x2 - x1), (y2 - y1))

        if self.tools['eraser']:
            painter.setPen(QPen(QtCore.Qt.white, 10, QtCore.Qt.SolidLine))
            painter.drawLine(
                self.firstPoint_x, self.firstPoint_y, endPoint_x, endPoint_y)
            self.firstPoint_x = endPoint_x
            self.firstPoint_y = endPoint_y

        if self.tools['pen']:
            painter.drawLine(
                self.firstPoint_x, self.firstPoint_y, endPoint_x, endPoint_y)
            self.firstPoint_x = endPoint_x
            self.firstPoint_y = endPoint_y

        if self.tools['line'] and self.flag:
            painter.drawLine(
                self.firstPoint_x, self.firstPoint_y, endPoint_x, endPoint_y)

        if self.tools['rect']:
            dx = endPoint_x - self.firstPoint_x
            dy = endPoint_y - self.firstPoint_y
            painter.drawRect(self.firstPoint_x, self.firstPoint_y, dx, dy)

        if self.tools['roundRect']:
            x1 = self.firstPoint_x
            y1 = self.firstPoint_y
            dx = endPoint_x - self.firstPoint_x
            dy = endPoint_y - self.firstPoint_y
            if x1 > endPoint_x and y1 > endPoint_y:
                painter.drawRoundedRect(
                    endPoint_x, endPoint_y, -dx, -dy, 20, 20, 0)
            else:
                painter.drawRoundedRect(x1, y1, dx, dy, 20., 20.)

        self.modified = True
        self.update()
    def drawPreview(self, endPoint_x, endPoint_y):
        painter = QPainter(self.imagePreview)
        painter.setPen(QPen(
            self.myPenColor,
            self.myPenWidth,
            QtCore.Qt.SolidLine,
            QtCore.Qt.RoundCap,
            QtCore.Qt.RoundJoin))
        painter.setClipping(True)

        painter.setRenderHint(QPainter.SmoothPixmapTransform, True)
        painter.setRenderHint(QPainter.HighQualityAntialiasing, True)
        painter.setRenderHint(QPainter.Antialiasing, True)

        painter.setOpacity(0.5)

        if self.tools['circle']:
            x1 = self.firstPoint_x
            y1 = self.firstPoint_y
            x2 = endPoint_x
            y2 = endPoint_y
            painter.drawEllipse(x1, y1, (x2 - x1), (y2 - y1))

        if self.tools['line']:
            painter.drawLine(
                self.firstPoint_x, self.firstPoint_y, endPoint_x, endPoint_y)

        if self.tools['rect']:
            painter.drawRect(
                self.firstPoint_x, self.firstPoint_y,
                endPoint_x - self.firstPoint_x,
                endPoint_y - self.firstPoint_y)

        if self.tools['roundRect']:
            x1 = self.firstPoint_x
            y1 = self.firstPoint_y
            dx = endPoint_x - self.firstPoint_x
            dy = endPoint_y - self.firstPoint_y
            if x1 > endPoint_x and y1 > endPoint_y:
                painter.drawRoundedRect(
                    endPoint_x, endPoint_y, -dx, -dy, 20, 20, 0)
            else:
                painter.drawRoundedRect(x1, y1, dx, dy, 20., 20.)

        self.update()