這裏是我想要的內容的描述: 在tkinter畫布中繪製幾何對象(這裏是矩形)的集合,並且可以使用鼠標瀏覽此畫布。點擊並拖動畫布,滾動放大並縮小。用鼠標移動和縮放tkinter畫布
使用這個話題,我找到的點擊和拖動部分: Move a tkinter canvas with Mouse 用鼠標
我設法寫點東西滾動放大。 移動和縮放都可以單獨使用。
問題: 如果我移動然後放大,縮放的焦點不再是光標的位置。
有什麼建議嗎?
下面一段代碼來測試
[編輯:現在應該適用於Linux和Windows]
import Tkinter as tk
import random
class Example(tk.Frame):
def __init__(self, root):
tk.Frame.__init__(self, root)
self.canvas = tk.Canvas(self, width=400, height=400, background="bisque")
self.xsb = tk.Scrollbar(self, orient="horizontal", command=self.canvas.xview)
self.ysb = tk.Scrollbar(self, orient="vertical", command=self.canvas.yview)
self.canvas.configure(yscrollcommand=self.ysb.set, xscrollcommand=self.xsb.set)
self.canvas.configure(scrollregion=(0,0,1000,1000))
self.xsb.grid(row=1, column=0, sticky="ew")
self.ysb.grid(row=0, column=1, sticky="ns")
self.canvas.grid(row=0, column=0, sticky="nsew")
self.grid_rowconfigure(0, weight=1)
self.grid_columnconfigure(0, weight=1)
#Plot some rectangles
for n in range(50):
x0 = random.randint(0, 900)
y0 = random.randint(50, 900)
x1 = x0 + random.randint(50, 100)
y1 = y0 + random.randint(50,100)
color = ("red", "orange", "yellow", "green", "blue")[random.randint(0,4)]
self.canvas.create_rectangle(x0,y0,x1,y1, outline="black", fill=color, activefill="black", tags=n)
self.canvas.create_text(50,10, anchor="nw", text="Click and drag to move the canvas\nScroll to zoom.")
# This is what enables using the mouse:
self.canvas.bind("<ButtonPress-1>", self.move_start)
self.canvas.bind("<B1-Motion>", self.move_move)
#linux scroll
self.canvas.bind("<Button-4>", self.zoomerP)
self.canvas.bind("<Button-5>", self.zoomerM)
#windows scroll
self.canvas.bind("<MouseWheel>",self.zoomer)
#move
def move_start(self, event):
self.canvas.scan_mark(event.x, event.y)
def move_move(self, event):
self.canvas.scan_dragto(event.x, event.y, gain=1)
#windows zoom
def zoomer(self,event):
if (event.delta > 0):
self.canvas.scale("all", event.x, event.y, 1.1, 1.1)
elif (event.delta < 0):
self.canvas.scale("all", event.x, event.y, 0.9, 0.9)
self.canvas.configure(scrollregion = self.canvas.bbox("all"))
#linux zoom
def zoomerP(self,event):
self.canvas.scale("all", event.x, event.y, 1.1, 1.1)
self.canvas.configure(scrollregion = self.canvas.bbox("all"))
def zoomerM(self,event):
self.canvas.scale("all", event.x, event.y, 0.9, 0.9)
self.canvas.configure(scrollregion = self.canvas.bbox("all"))
if __name__ == "__main__":
root = tk.Tk()
Example(root).pack(fill="both", expand=True)
root.mainloop()
當我運行的代碼我不能縮放在Windows上即時通訊。 – W1ll1amvl 2014-09-11 19:37:32
我爲Windows兼容性添加了一些行。不知道它是否會起作用... – 2014-09-12 12:57:42
不管它仍然不起作用?它是否始終專注於相同的位置,即始終是右側的一小部分,還是隨機的? – W1ll1amvl 2014-09-13 01:57:23