回答編集履歴
1
追記
answer
CHANGED
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@@ -14,4 +14,95 @@
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x_ent.insert(0, x)
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y_ent.delete(0, tk.END)
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y_ent.insert(0, y)
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```
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## 追記：円の大きさを倍率に合わせる
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試行錯誤していたら、円の大きさを倍率に合わせることができたので貼っておきます。
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正確な理屈は理解できていませんが。
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```Python
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import tkinter as tk
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from tkinter import *
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g_scale = 1.0 # 累積倍率
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g_tagno = 1 # 各円のタグ名。新規追加した円のみスケーリングするために。
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def pos(event):
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x = int(canvas.canvasx(event.x))
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y = int(canvas.canvasy(event.y))
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canvas.delete("line")
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x_ent.delete(0, tk.END)
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x_ent.insert(0, x)
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y_ent.delete(0, tk.END)
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y_ent.insert(0, y)
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def lclick(event):
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x, y = int(x_ent.get()), int(y_ent.get())
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global g_tagno
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tag = 'temp{}'.format(g_tagno)
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canvas.create_oval(x-5, y-5, x+5, y+5, activefill = 'black',fill='red',tag=tag)
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g_tagno += 1
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canvas.scale(tag, x, y, g_scale, g_scale) # この円だけスケーリングする
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def zoomer(event):
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sf = 1.1 if event.delta > 0 else 0.9
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# 累積倍率を記録しておく
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global g_scale
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g_scale *= sf
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canvas.scale("all", 0,0,sf, sf)
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canvas.configure(scrollregion=canvas.bbox("all"))
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# 以下は変わらず
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def move_start(event):
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canvas.scan_mark(event.x, event.y)
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def move_move(event):
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canvas.scan_dragto(event.x, event.y, gain=1)
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def show_width(event):
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window_width.delete(0, tk.END)
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window_width.insert(0, event.width)
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window = tk.Tk()
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window.title('サンプル')
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frame_T = tk.Frame(window,bd=1,relief="ridge")
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frame_T.grid(row=0, column=0,sticky='news')
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frame1_1 = tk.Frame(window,bd=1,relief="ridge")
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frame1_1.grid(row=1, column=0,sticky='news')
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frame_main = tk.Frame(window,bd=1,relief="ridge")
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frame_main.grid(row=2, column=0,sticky='news')
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y_ent = tk.Entry(frame_T)
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y_ent.pack(side=RIGHT)
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x_ent = tk.Entry(frame_T)
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x_ent.pack(side=RIGHT)
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window_width = tk.Entry(frame_T)
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window_width.pack(side=RIGHT)
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canvas = tk.Canvas(master = frame_main, height=600, width=1000, bg='white',bd=1,relief="ridge")
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canvas.grid(row=0, column=0,sticky='news')
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xsb = tk.Scrollbar(frame_main, orient="horizontal", command=canvas.xview)
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ysb = tk.Scrollbar(frame_main, orient="vertical", command=canvas.yview)
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canvas.configure(yscrollcommand=ysb.set, xscrollcommand=xsb.set)
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xsb.grid(row=1, column=0,sticky="ew")
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ysb.grid(row=0, column=1, sticky="ns")
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canvas.bind('<Motion>', pos)
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canvas.bind('<Button-1>', lclick)
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canvas.bind("<MouseWheel>",zoomer)
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canvas.bind("<ButtonPress-3>", move_start)
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canvas.bind("<B3-Motion>", move_move)
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canvas.bind("<Configure>", show_width)
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frame_main.grid_columnconfigure(0,weight=1)
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frame_main.grid_rowconfigure(0,weight=1)
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window.grid_columnconfigure(0,weight=1)
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window.grid_rowconfigure(2,weight=1)
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window.mainloop()
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```
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