如何显示图片和获取鼠标点击坐标
如何显示图片和获取鼠标点击坐标
提问于 2011-03-31 22:06:31
我想知道是否有可能在Python (Windows)中显示一些图片，然后用鼠标单击此图片，并获得此点击相对于图片边缘的坐标。
谢谢!
回答 5
Stack Overflow用户
回答已采纳
发布于 2011-03-31 23:11:54
是的，一旦你理解了tkinter，这是可能的，也是相当容易的，这里有一个快速脚本：
from Tkinter import *
from tkFileDialog import askopenfilename
import Image, ImageTk
if __name__ == "__main__":
root = Tk()
#setting up a tkinter canvas with scrollbars
frame = Frame(root, bd=2, relief=SUNKEN)
frame.grid_rowconfigure(0, weight=1)
frame.grid_columnconfigure(0, weight=1)
xscroll = Scrollbar(frame, orient=HORIZONTAL)
xscroll.grid(row=1, column=0, sticky=E+W)
yscroll = Scrollbar(frame)
yscroll.grid(row=0, column=1, sticky=N+S)
canvas = Canvas(frame, bd=0, xscrollcommand=xscroll.set, yscrollcommand=yscroll.set)
canvas.grid(row=0, column=0, sticky=N+S+E+W)
xscroll.config(command=canvas.xview)
yscroll.config(command=canvas.yview)
frame.pack(fill=BOTH,expand=1)
#adding the image
File = askopenfilename(parent=root, initialdir="C:/",title='Choose an image.')
img = ImageTk.PhotoImage(Image.open(File))
canvas.create_image(0,0,image=img,anchor="nw")
canvas.config(scrollregion=canvas.bbox(ALL))
#function to be called when mouse is clicked
def printcoords(event):
#outputting x and y coords to console
print (event.x,event.y)
#mouseclick event
canvas.bind("<Button 1>",printcoords)
root.mainloop()未编辑时，它将使用默认的窗口坐标系打印到控制台。canvas小部件将左上角设置为0,0点，因此您可能需要修改printcoord函数。要获得加载的图片尺寸，您可以使用canvas.bbox(ALL)，并且您可能希望切换到使用canvasx和canvasy坐标，而不是它的原样。如果你是tkinter的新手，谷歌应该能够帮助你完成它:)。
Stack Overflow用户
发布于 2011-04-01 00:28:16
这是我不久前用wxPython和各种wxPython教程拼凑出来的一个版本。这会将鼠标单击坐标打印到单独的输出窗口。(使用Python 2.6.2、wxPython 2.8.10.1)
在底部的filepath变量中输入图像的路径。
import wx
class MyCanvas(wx.ScrolledWindow):
def __init__(self, parent, id = -1, size = wx.DefaultSize, filepath = None):
wx.ScrolledWindow.__init__(self, parent, id, (0, 0), size=size, style=wx.SUNKEN_BORDER)
self.image = wx.Image(filepath)
self.w = self.image.GetWidth()
self.h = self.image.GetHeight()
self.bmp = wx.BitmapFromImage(self.image)
self.SetVirtualSize((self.w, self.h))
self.SetScrollRate(20,20)
self.SetBackgroundColour(wx.Colour(0,0,0))
self.buffer = wx.EmptyBitmap(self.w, self.h)
dc = wx.BufferedDC(None, self.buffer)
dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
dc.Clear()
self.DoDrawing(dc)
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.Bind(wx.EVT_LEFT_UP, self.OnClick)
def OnClick(self, event):
pos = self.CalcUnscrolledPosition(event.GetPosition())
print '%d, %d' %(pos.x, pos.y)
def OnPaint(self, event):
dc = wx.BufferedPaintDC(self, self.buffer, wx.BUFFER_VIRTUAL_AREA)
def DoDrawing(self, dc):
dc.DrawBitmap(self.bmp, 0, 0)
class MyFrame(wx.Frame):
def __init__(self, parent=None, id=-1, filepath = None):
wx.Frame.__init__(self, parent, id, title=filepath)
self.canvas = MyCanvas(self, -1, filepath = filepath)
self.canvas.SetMinSize((self.canvas.w, self.canvas.h))
self.canvas.SetMaxSize((self.canvas.w, self.canvas.h))
self.canvas.SetBackgroundColour(wx.Colour(0, 0, 0))
vert = wx.BoxSizer(wx.VERTICAL)
horz = wx.BoxSizer(wx.HORIZONTAL)
vert.Add(horz,0, wx.EXPAND,0)
vert.Add(self.canvas,1,wx.EXPAND,0)
self.SetSizer(vert)
vert.Fit(self)
self.Layout()
if __name__ == '__main__':
app = wx.App()
app.SetOutputWindowAttributes(title='stdout')
wx.InitAllImageHandlers()
filepath = 'ENTER FILEPATH HERE'
if filepath:
print filepath
myframe = MyFrame(filepath=filepath)
myframe.Center()
myframe.Show()
app.MainLoop()Stack Overflow用户
发布于 2017-02-03 04:08:18
以下是bigjim答案的修订版。它可以在python 3.4+中工作(没有测试其他任何东西)。我没有麻烦的PIL部分，因为tkinter的PhotoImage可以处理gif和pgm，这足以演示这一点。
lambda函数处理事件(窗口)坐标和图像坐标之间的转换。
我还添加了对press vs release的支持，因为我需要那个特定的功能。
from tkinter import *
from tkinter.filedialog import askopenfilename
event2canvas = lambda e, c: (c.canvasx(e.x), c.canvasy(e.y))
if __name__ == "__main__":
root = Tk()
#setting up a tkinter canvas with scrollbars
frame = Frame(root, bd=2, relief=SUNKEN)
frame.grid_rowconfigure(0, weight=1)
frame.grid_columnconfigure(0, weight=1)
xscroll = Scrollbar(frame, orient=HORIZONTAL)
xscroll.grid(row=1, column=0, sticky=E+W)
yscroll = Scrollbar(frame)
yscroll.grid(row=0, column=1, sticky=N+S)
canvas = Canvas(frame, bd=0, xscrollcommand=xscroll.set, yscrollcommand=yscroll.set)
canvas.grid(row=0, column=0, sticky=N+S+E+W)
xscroll.config(command=canvas.xview)
yscroll.config(command=canvas.yview)
frame.pack(fill=BOTH,expand=1)
#adding the image
File = askopenfilename(parent=root, initialdir="M:/",title='Choose an image.')
print("opening %s" % File)
img = PhotoImage(file=File)
canvas.create_image(0,0,image=img,anchor="nw")
canvas.config(scrollregion=canvas.bbox(ALL))
#function to be called when mouse is clicked
def printcoords(event):
#outputting x and y coords to console
cx, cy = event2canvas(event, canvas)
print ("(%d, %d) / (%d, %d)" % (event.x,event.y,cx,cy))
#mouseclick event
canvas.bind("<ButtonPress-1>",printcoords)
canvas.bind("<ButtonRelease-1>",printcoords)
root.mainloop()页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/5501192
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