用python做了個桌球瞄准器

記得上次記錄了個pyqt4做透明界面的代碼，就是為了這個瞄准器，不過這幾天一直沒干正經事。。今天下午一鼓作氣到現在，總算是搞定了，然后。。上次那個透明的代碼弱爆了，不知道是哪些神坑欺負我們這些qt的門外漢，搞那么多花樣。。找了官方文檔，一句話搞定。。（改正，兩個透明代碼功能不同，之前不了解。我錯了。。。。）

用到了pyqt4、pywin32這些個庫，廢話不說，上代碼先

#coding=utf-8

# Alan(Chaofan Zhang)
# [e-mail]
# http://weibo.com/alanslab
# https://gitcafe.com/activities
# https://github.com/zcfan


import sys, math, win32gui, win32api
from PyQt4 import QtGui, QtCore
from PyQt4.QtCore import Qt

class Trans(QtGui.QWidget):
    # status code
    STATUS_STARTPOINT = 0
    STATUS_ENDPOINT = 1
    STATUS_ESC = 2

    BALL_SIZE = 25
    
    def __init__(self):
        super(Trans, self).__init__()
        self.startpoint = ()
        self.endpoint = ()
        #self.targetpoint =()
        self.status = 0
        self.initUI()

    def initUI(self):
        # make a unvisable fullscreen window
        self.setWindowOpacity(0.01)
        self.setWindowFlags(Qt.FramelessWindowHint)
        desktop = QtGui.QApplication.desktop()
        rect = desktop.availableGeometry()
        self.setGeometry(rect)

        # set the style of mouse cursor
        mcursor = QtGui.QCursor(QtGui.QPixmap("./cursor.png"))
        self.setCursor(mcursor)

        # not using anymore
##    def paintEvent(self, event):
##        paint = QtGui.QPainter()
##        paint.begin(self)
##        
##        if len(self.startpoint) == 2:
##            self.printStartpoint(paint)
##        if len(self.endpoint) == 2:
##            self.printEndpoint(paint)
##            self.printLine(paint)
##            #self.printTargetpoint(paint)
##
##        paint.end()
##
##    def printStartpoint(self, paint):
##        paint.setPen(Qt.red)
##        paint.drawPoint(self.startpoint[0], self.startpoint[1])
##
##    def printEndpoint(self, paint):
##        paint.setPen(Qt.red)
##        paint.drawPoint(self.endpoint[0], self.endpoint[1])
##
##    def printLine(self, paint):
##        pen = QtGui.QPen(Qt.green)
##        paint.setPen(pen)
##        paint.drawLine(self.startpoint[0], self.startpoint[1],
##                       self.endpoint[0], self.endpoint[1])

    #def printTargetpoint(self, paint):
        
    def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
           
            if self.status == self.STATUS_STARTPOINT:
                self.status = self.STATUS_ENDPOINT
                self.endpoint = ()
                self.startpoint = (event.x(), event.y())
                self.update()
                
            elif self.status == self.STATUS_ENDPOINT:
                self.status = self.STATUS_ESC
                self.endpoint = (event.x(), event.y())

                lenX = self.endpoint[0]-self.startpoint[0]
                lenY = self.endpoint[1]-self.startpoint[1]
                tmpX = int(round(self.BALL_SIZE * (lenX / math.sqrt(
                    math.pow(lenX, 2) + math.pow(lenY, 2)))))
                tmpY = int(round(self.BALL_SIZE * (lenY / math.sqrt(
                    math.pow(lenX, 2) + math.pow(lenY, 2)))))

                # move mouse cursor to the right position
                win32api.SetCursorPos((win32gui.GetCursorPos()[0] + tmpX,
                                       win32gui.GetCursorPos()[1] + tmpY))

                self.targetpoint = (self.endpoint[0] + tmpX,
                                    self.endpoint[1] + tmpY)
                
                self.update()
                
            elif self.status == self.STATUS_ESC:
                self.close()
        
if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    trans = Trans()
    trans.show()
    sys.exit(app.exec_())

另存為simple.pyw，同目錄下有張圖片cursor.png

用法：

1、游戲中需要用到瞄准器的時候雙擊pyw文件運行，鼠標會變成圓環，你想把目標球（用白球擊中的那個）打到哪個位置就點哪里。

2、然后再點目標球（要精確點），瞄准器會把你的光標移動到合適的位置，鼠標不要再動了。

3、再點一次左鍵關閉看不見的瞄准器窗口，注意到光標恢復原狀。（這步沒用。。本來有別的想法。。）

4、也許還需要再點一次左鍵讓游戲窗口獲取焦點，然后點左鍵擊球吧。

似乎參數沒調整太准，動作太大就容易跑偏。。真想靠這種玩意拿高分的還是掂量着點吧。。自個調整也成。。