Tkinter-调整包含其他小部件的小部件的大小

Question

我正在尝试构建外观为

的UI

------------------------------| s |
Label-1 | Canvas-1            | c |
------------------------------| r |
Label-2 | Canvas-2            | o |
------------------------------| l |
Label-3 | Canvas-3            | l |
------------------------------|   |
 . . .                        | Y |
Label-n | Canvas-n            |   |
------------------------------|   |
        | scrollbar-horizontal|   |
------------------------------|   |

使用下面发布的代码，我能够做到。我唯一缺少的是能够使用Canvas对象和调整零件大小的功能，同时保持y-scroll-bar的功能。我找到了一种通过取消注释self.frame.pack(expand=True, fill='x')来启用大小调整的方法，但是y-scroll-bar不起作用。另外，我可以使用y-scroll-bar，但是重新调整Canvas对象的大小无法正常工作，当我放大窗口时，可以看到一个白色的空白，如下所示。

也许值得一提的是，我的代码中的内部Frame使用了网格管理器，并且我尝试同时使用grid_rowconfigure和grid_columnconfigure来获得所需的内容。但是我无法使其工作。

我想知道如何使两者同时工作。

import tkinter
import tkinter.font


class LineData(object):

    def __init__(self, desc, box):
        self.desc = desc
        self.box = box


class LinePlotter(object):

    def __init__(self, label, canvas, desc, box):
        self.label = label
        self.canvas = canvas
        self.desc = desc
        self.box = box

    def plot(self):
        self.label.set(self.desc)
        x1, y1 = self.box[0], 1
        x2, y2 = self.box[1], 20
        self.canvas.create_rectangle(x1, y1, x2, y2, outline="#D1D0CE",
                                     width=4, fill="#D1D0CE")

        self.canvas.create_rectangle(x2+100, y1, x2+(x2-x1)+100, y2, outline="#D1D0CE",
                                     width=4, fill="#D1D0CE")


class Plotter(tkinter.Frame):

    def __init__(self, parent, lines_data):
        super().__init__(root)
        self.root = root

        self.outer_canvas = tkinter.Canvas(root, borderwidth=0, background="#ffffff")
        self.frame = tkinter.Frame(self.outer_canvas, background="#ffffff")

        self.scrollY = tkinter.Scrollbar(root, orient=tkinter.VERTICAL, command=self.outer_canvas.yview)
        self.outer_canvas.configure(yscrollcommand=self.scrollY.set)
        self.scrollY.pack(side="right", fill="y", expand=False)

        self.outer_canvas.pack(side="left", fill="both", expand=True)

        self.outer_canvas.create_window((4, 4), window=self.frame, anchor="nw",
                                  tags="self.frame")

        # uncommenting this parts allows to resize Canvas part but then y-scroll-bar does not work
        # self.frame.pack(expand=True, fill='x')
        self.frame.bind("<Configure>", self.onFrameConfigure)

        self.lines_data = lines_data

    def onFrameConfigure(self, event):
        self.outer_canvas.configure(scrollregion=self.outer_canvas.bbox("all"))

    def configure_xscroll_bar(self):
        x1, y1, x2, y2 = self.canvases[0].bbox(tkinter.ALL)
        x1 = y1 = 0
        for c in self.canvases:
            t1, u1, t2, u2 = c.bbox(tkinter.ALL)
            x1 = min(x1, t1)
            x2 = max(x2, t2)
            y1 = min(y1, u1)
            y2 = max(y2, u2)

        for c in self.canvases:
            c.config(scrollregion=(x1-5, y1-5, x2+5, y2+5))

    def xview(self, *args):
        for c in self.canvases:
            c.xview(*args)

    def create_x_scroll_bars(self):
        self.scrollX = tkinter.Scrollbar(self.frame, orient=tkinter.HORIZONTAL)

        self.scrollX['command'] = self.xview
        l = len(self.lines_data)
        self.scrollX.grid(row=l, column=1, sticky='NSEW')

    def initUI(self):

        self.create_x_scroll_bars()

        self.canvases = []

        h = 40
        for row_idx, line_data in enumerate(self.lines_data):
            desc = tkinter.StringVar()
            font = tkinter.font.Font(size=11)
            label = tkinter.Label(self.frame, textvariable=desc, font=font)
            label.grid(row=row_idx, column=0, sticky=tkinter.W)

            canvas = tkinter.Canvas(self.frame, bg='white',
                                    xscrollcommand=self.scrollX.set,
                                    height=h)

            line = LinePlotter(desc, canvas, line_data.desc, line_data.box)
            line.plot()

            canvas.grid(row=row_idx, column=1, sticky='NSEW')
            self.canvases.append(canvas)

        self.configure_xscroll_bar()

        # for row_idx in range(len(self.lines_data)+1):
        #     self.frame.grid_rowconfigure(row_idx, weight=1)

        # self.frame.grid_columnconfigure(1, weight=1)

        self.pack(expand=True, fill=tkinter.BOTH)


def prepare_data():
    lst = []
    for i in range(1, 20):
        d = "{}".format(i)
        x1 = (i+1)*20
        x2 = x1+30
        l = LineData(d, (x1, x2))
        lst.append(l)
    return lst


root = tkinter.Tk()
Plotter(root, prepare_data()).initUI()
root.mainloop()

Answer 1

我自己能够解决问题，所以让我分享使它起作用的工具：

• 不使用包管理器，而是用于所有窗口小部件和框架网格管理器；
• 正确使用“ sticky”选项，以便正确放置和扩展小部件；
• 使用“ itemconfig”更改函数“ onFrameConfigure”中的框架属性；
• 为不同的小部件设置不同的背景颜色对于了解哪些小部件的行为不符合预期非常有帮助。

下面是修改后的工作代码。

import tkinter
import tkinter.font


class LineData(object):

    def __init__(self, desc, box):
        self.desc = desc
        self.box = box


class LinePlotter(object):

    def __init__(self, label, canvas, desc, box):
        self.label = label
        self.canvas = canvas
        self.desc = desc
        self.box = box

    def plot(self):
        self.label.set(self.desc)
        x1, y1 = self.box[0], 1
        x2, y2 = self.box[1], 20
        self.canvas.create_rectangle(x1, y1, x2, y2, outline="#D1D0CE",
                                     width=4, fill="#D1D0CE")

        self.canvas.create_rectangle(x2+100, y1, x2+(x2-x1)+100, y2, outline="#D1D0CE",
                                     width=4, fill="#D1D0CE")


class Plotter(tkinter.Frame):

    def __init__(self, root, lines_data):
        super().__init__(root, background="green")
        self.root = root
        self.root.grid_columnconfigure(index=0, weight=1)
        self.root.grid_rowconfigure(index=0, weight=1)

        self.outer_canvas = tkinter.Canvas(root, borderwidth=0, background="blue")
        self.outer_canvas.grid(row=0, column=0, sticky="WENS")

        self.scrollY = tkinter.Scrollbar(root, orient=tkinter.VERTICAL, command=self.outer_canvas.yview, background="red")
        self.outer_canvas.configure(yscrollcommand=self.scrollY.set)
        self.scrollY.grid(row=0, column=1, sticky="NSE")

        self.frame = tkinter.Frame(self.outer_canvas, background="black")
        self.frame_id = self.outer_canvas.create_window((4, 4), window=self.frame, anchor="nw",
                                  tags="self.frame")

        self.frame.bind("<Configure>", self.onFrameConfigure)
        self.outer_canvas.bind('<Configure>', self.onFrameConfigure)
        self.lines_data = lines_data

    def onFrameConfigure(self, event):

        f_reqsize = (self.frame.winfo_reqwidth(), self.frame.winfo_reqheight())
        c_size = (self.outer_canvas.winfo_width(), self.outer_canvas.winfo_height())
        f_width = max(f_reqsize[0], c_size[0])
        f_height = max(f_reqsize[1], c_size[1])

        self.outer_canvas.config(scrollregion=self.outer_canvas.bbox("all"))
        self.outer_canvas.itemconfig(self.frame_id, width=f_width, height=f_height)

    def configure_xscroll_bar(self):
        x1, y1, x2, y2 = self.canvases[0].bbox(tkinter.ALL)
        x1 = y1 = 0
        for c in self.canvases:
            t1, u1, t2, u2 = c.bbox(tkinter.ALL)
            x1 = min(x1, t1)
            x2 = max(x2, t2)
            y1 = min(y1, u1)
            y2 = max(y2, u2)

        for c in self.canvases:
            c.config(scrollregion=(x1-5, y1-5, x2+5, y2+5))

    def xview(self, *args):
        for c in self.canvases:
            c.xview(*args)

    def create_x_scroll_bars(self):
        self.scrollX = tkinter.Scrollbar(self.frame, orient=tkinter.HORIZONTAL)

        self.scrollX['command'] = self.xview
        l = len(self.lines_data)
        self.scrollX.grid(row=l, column=1, sticky='NSEW')

    def initUI(self):

        self.create_x_scroll_bars()

        self.canvases = []

        self.frame.grid_columnconfigure(1, weight=1)

        h = 40
        for row_idx, line_data in enumerate(self.lines_data):
            desc = tkinter.StringVar()
            font = tkinter.font.Font(size=11)
            label = tkinter.Label(self.frame, textvariable=desc, font=font)
            label.grid(row=row_idx, column=0, sticky=tkinter.W)

            canvas = tkinter.Canvas(self.frame, bg='white',
                                    xscrollcommand=self.scrollX.set,
                                    height=h)

            line = LinePlotter(desc, canvas, line_data.desc, line_data.box)
            line.plot()

            canvas.grid(row=row_idx, column=1, sticky='NSEW')
            self.canvases.append(canvas)

        self.configure_xscroll_bar()


def prepare_data():
    lst = []
    for i in range(1, 20):
        d = "{}".format(i)
        x1 = (i+1)*20
        x2 = x1+30
        l = LineData(d, (x1, x2))
        lst.append(l)
    return lst


root = tkinter.Tk()
Plotter(root, prepare_data()).initUI()
root.mainloop()