本文整理汇总了Python中tkinter.Canvas.focus_force方法的典型用法代码示例。如果您正苦于以下问题：Python Canvas.focus_force方法的具体用法？Python Canvas.focus_force怎么用？Python Canvas.focus_force使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类tkinter.Canvas的用法示例。
在下文中一共展示了Canvas.focus_force方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: take_screenshot_crop
# 需要导入模块: from tkinter import Canvas [as 别名]
# 或者: from tkinter.Canvas import focus_force [as 别名]
def take_screenshot_crop(path):
pimage = _r.take_screenshot()
_, _, width, height = pimage.getbbox()
displays = _r.get_display_monitors()
leftmost, topmost = 0, 0
for d in displays:
if d[0] < leftmost:
leftmost = d[0]
if d[1] < topmost:
topmost = d[1]
root = Tk() # Creates a Tkinter window
root.overrideredirect(True) # Makes the window borderless
root.geometry("{0}x{1}+{2}+{3}".format(width, height, leftmost, topmost)) # window size = screenshot size
root.config(cursor="crosshair") # Sets the cursor to a crosshair
pimage_tk = ImageTk.PhotoImage(pimage) # Converts the PIL.Image into a Tkinter compatible PhotoImage
can = Canvas(root, width=width, height=height) # Creates a canvas object on the window
can.pack()
can.create_image((0, 0), image=pimage_tk, anchor="nw") # Draws the screenshot onto the canvas
# This class holds some information about the drawn rectangle
class CanInfo:
rect = None
startx, starty = 0, 0
# Stores the starting position of the drawn rectangle in the CanInfo class
def xy(event):
CanInfo.startx, CanInfo.starty = event.x, event.y
# Redraws the rectangle when the cursor has been moved
def capture_motion(event):
can.delete(CanInfo.rect)
CanInfo.rect = can.create_rectangle(CanInfo.startx, CanInfo.starty, event.x, event.y)
# Cancels screen capture
def cancel(event):
if event.keycode == 27: # cancel when pressing ESC
root.destroy()
# Saves the image when the user releases the left mouse button
def save_img(event):
startx, starty = CanInfo.startx, CanInfo.starty
endx, endy = event.x, event.y
# Puts the starting point in the upper left and the ending point in the lower right corner of the rectangle
if startx > endx:
startx, endx = endx, startx
if starty > endy:
starty, endy = endy, starty
crop_image = pimage.crop((startx, starty, endx, endy))
crop_image.save(path, "PNG")
root.destroy() # Closes the Tkinter window
# Binds mouse actions to the functions defined above
can.bind("<KeyPress>", cancel)
can.bind("<Button-1>", xy)
can.bind("<B1-Motion>", capture_motion)
can.bind("<ButtonRelease-1>", save_img)
can.focus_force() # Force focus of capture screen
root.mainloop() # Shows the Tk window and loops until it is closed