Graph.py 文件源码

def toggleCursor(self):
        print('toggleCursor')


        if self.cursorActive:
            inv = self.host.transData.inverted()

            _xlim = self.host.get_xlim()
            _ylim = self.host.get_ylim()
            _xy1 = self.host.transData.transform((_xlim[0],_ylim[1]))
            _xy2 = self.host.transData.transform((_xlim[1],_ylim[0]))
            #_xy1 = self.host.transData.transform((_posx[0],_posy[0]))
            #ä_xy2 = self.host.transData.transform((_posx[1],_posy[1]))

            _x1 = _xy1[0]+20
            _x2 = _xy1[0]+40
            _y1 = _xy2[1]+20
            _y2 = _xy2[1]+40

            _xy1t = inv.transform((_x1,_y1))
            _xy2t = inv.transform((_x2,_y2))
            self.cursorA = CursorStatic(self.host,_xy1t[0],_xy1t[1],'gray',self)
            self.cursorB = CursorStatic(self.host,_xy2t[0],_xy2t[1],'black',self)
            self.showCursorPos(self.cursorA.x,self.cursorA.y,'A')
            self.showCursorPos(self.cursorB.x,self.cursorB.y,'B')
            self.showCursorPos(math.fabs(self.cursorB.x-self.cursorA.x),math.fabs(self.cursorB.y-self.cursorA.y),'C')
            # # self.line = Line2D(_xy1,_xy2)

            # self.line1 = Line2D(_xlim, (_xy2t[1],_xy2t[1]))
            # self.line2 = Line2D((_xy1t[0],_xy1t[0]), _ylim)
            # self.host.add_line(self.line1)
            # self.host.add_line(self.line2)
            # self.signalGraphUpdate.emit()
            print ('cursor added')
#           self.cursorD = Cursor(self.host, useblit=False, color='blue', linewidth=2)
        else:
            self.cursorA.delLine()
            self.cursorA = None
            self.cursorB.delLine()
            self.cursorB = None