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matplotlib

Useful tkinter functions that use matplotlib

CustomToolbar

Bases: NavigationToolbar2Tk

Customised version of matplotlib toolbar with added popout and copy functions

Source code in mmg_toolbox/tkguis/misc/matplotlib.py 
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class CustomToolbar(NavigationToolbar2Tk):
    """Customised version of matplotlib toolbar with added popout and copy functions"""

    def copy_button(self):
        """Copy figure to clipboard - doesn't currently work"""
        import io
        from PIL import Image
        # print(self.canvas.figure.canvas.tostring_rgb())
        image_buffer, (width, height) = self.canvas.figure.canvas.print_to_buffer()
        img = Image.frombytes("RGBA", (width, height), image_buffer)
        io_buffer = io.BytesIO()
        img.save(io_buffer, format='PNG')
        io_buffer.seek(0)
        self.master.clipboard_clear()
        self.master.clipboard_append(io_buffer.getvalue(), format="image/png")  # adds byte array to buffer but isn't interpreted

    def popout_figure(self):
        """Create a new tk window and display figure"""
        root = create_root('Figure', parent=self.master)
        fig, ax1, plot_list, toolbar = ini_plot(root, FIGURE_SIZE, FIGURE_DPI)

        for old_ax in self.canvas.figure.get_axes():
            ax1.set_title(old_ax.title.get_text())
            ax1.set_xlabel(old_ax.get_xlabel())
            ax1.set_ylabel(old_ax.get_ylabel())
            for line in old_ax.lines:
                ax1.plot(line.get_xdata(), line.get_ydata())

    def __init__(self, canvas_, parent_):
        # Add additional functions
        self.toolitems += (
            # (name, description, image, function)
            (None, None, None, None),  # seperator
            # ('copy', 'Copy Figure', 'filesave', 'copy_button'),
            ('popout', 'Popout Figure', 'qt4_editor_options', 'popout_figure'),
        )

        NavigationToolbar2Tk.__init__(self, canvas_, parent_)
        bg = get_style_background(parent_)
        self.config(background=bg)

copy_button()

Copy figure to clipboard - doesn't currently work

Source code in mmg_toolbox/tkguis/misc/matplotlib.py 
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def copy_button(self):
    """Copy figure to clipboard - doesn't currently work"""
    import io
    from PIL import Image
    # print(self.canvas.figure.canvas.tostring_rgb())
    image_buffer, (width, height) = self.canvas.figure.canvas.print_to_buffer()
    img = Image.frombytes("RGBA", (width, height), image_buffer)
    io_buffer = io.BytesIO()
    img.save(io_buffer, format='PNG')
    io_buffer.seek(0)
    self.master.clipboard_clear()
    self.master.clipboard_append(io_buffer.getvalue(), format="image/png")  # adds byte array to buffer but isn't interpreted

popout_figure()

Create a new tk window and display figure

Source code in mmg_toolbox/tkguis/misc/matplotlib.py 
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def popout_figure(self):
    """Create a new tk window and display figure"""
    root = create_root('Figure', parent=self.master)
    fig, ax1, plot_list, toolbar = ini_plot(root, FIGURE_SIZE, FIGURE_DPI)

    for old_ax in self.canvas.figure.get_axes():
        ax1.set_title(old_ax.title.get_text())
        ax1.set_xlabel(old_ax.get_xlabel())
        ax1.set_ylabel(old_ax.get_ylabel())
        for line in old_ax.lines:
            ax1.plot(line.get_xdata(), line.get_ydata())

add_rectangle(ax, left, bottom, width, height)

Add rectangle to axes

Source code in mmg_toolbox/tkguis/misc/matplotlib.py 
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def add_rectangle(ax: Axes, left: float, bottom: float, width: float, height: float) -> Rectangle:
    """Add rectangle to axes"""
    rect = Rectangle((left, bottom), width, height, fill=False, edgecolor='black', facecolor='white', zorder=2)
    ax.add_patch(rect)
    return rect

ini_image(frame, figure_size=None, figure_dpi=None)

Create an empty image plot on a tk canvas with toolbar

fig, ax, plot_list, image, cbar, toolbar = ini_image(frame, figure_size, figure_dpi)
image.remove()
image = ax.pcolormesh(image_array, shading='auto')
colorbar.update_normal(image)
toolbar.update()
fig.canvas.draw()

Parameters:

Name Type Description Default
frame Misc

parent frame within which the figure will be placed.

 required
figure_size tuple[int, int] | None

size of the figure in inches [horiz, vert], passed to matplotlib.Figure()

 None
figure_dpi int | None

figure DPI, passed to matplotlib.Figure()

 None

Returns:

Type Description
tuple[Figure, Axes, list[Line2D], QuadMesh, Colorbar, CustomToolbar]

tuple[Figure, Axes, list[Line2D], Toolbar]
Source code in mmg_toolbox/tkguis/misc/matplotlib.py 
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def ini_image(frame: tk.Misc, figure_size: tuple[int, int] | None = None,
              figure_dpi: int | None = None) -> tuple[Figure, Axes, list[Line2D], QuadMesh, Colorbar, CustomToolbar]:
    """
    Create an empty image plot on a tk canvas with toolbar

        fig, ax, plot_list, image, cbar, toolbar = ini_image(frame, figure_size, figure_dpi)
        image.remove()
        image = ax.pcolormesh(image_array, shading='auto')
        colorbar.update_normal(image)
        toolbar.update()
        fig.canvas.draw()

    :param frame: parent frame within which the figure will be placed.
    :param figure_size: size of the figure in inches [horiz, vert], passed to matplotlib.Figure()
    :param figure_dpi: figure DPI, passed to matplotlib.Figure()
    :returns: tuple[Figure, Axes, list[Line2D], Toolbar]
    """
    if figure_size is None:
        figure_size = IMAGE_SIZE
    if figure_dpi is None:
        figure_dpi = FIGURE_DPI

    # get the current background
    bg = get_style_background(frame)

    fig = Figure(figsize=figure_size, dpi=figure_dpi)
    try:
        fig.patch.set_facecolor(bg)
    except ValueError:
        print(f"Cannot set background color of {bg}")
        bg = '#dcdad5'

    ax1 = fig.add_subplot(111)
    # zeros = np.array([[0 for n in range(10)] for m in range(10)])
    xvals = np.arange(100)
    yvals = np.arange(100)
    default = np.random.rand(100, 100)
    ax1_image = ax1.pcolormesh(xvals, yvals, default, shading='auto', cmap=DEFAULT_COLORMAP)
    ax1.set_xlabel(u'Axis 0')
    ax1.set_ylabel(u'Axis 1')
    ax1.set_xlim([0, 100])
    ax1.set_ylim([0, 100])
    cb1 = fig.colorbar(ax1_image, ax=ax1)
    ax1.axis('image')
    plot_list: list[plt.Line2D] = []

    frm = ttk.Frame(frame)
    frm.pack(expand=tk.YES, fill=tk.BOTH, pady=2, padx=5)
    # frm.configure(bg=bg)
    canvas = FigureCanvasTkAgg(fig, frm)
    # canvas.get_tk_widget().configure(bg=bg)
    canvas.draw()
    canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=tk.YES, padx=5, pady=2)

    # Toolbar
    frm2 = ttk.Frame(frm)
    frm2.pack(side=tk.TOP, expand=tk.NO, fill=tk.X, padx=5, pady=2)
    # toolbar = NavigationToolbar2Tk(canvas, frm)
    toolbar = CustomToolbar(canvas, frm2)
    toolbar.config(background=bg)
    toolbar.update()
    toolbar.pack(fill=tk.X, expand=tk.YES)
    return fig, ax1, plot_list, ax1_image, cb1, toolbar

ini_plot(frame, figure_size=None, figure_dpi=None)

Create a lineplot on a tk canvas with toolbar

fig, ax, line_list, toolbar = ini_plot(frame, figure_size, figure_dpi)
line_list.extend(ax.plot(x, y))
fig.canvas.draw()
toolbar.update()

Parameters:

Name Type Description Default
frame Misc

parent frame within which the figure will be placed.

 required
figure_size tuple[int, int] | None

size of the figure in inches [horiz, vert], passed to matplotlib.Figure()

 None
figure_dpi int | None

figure DPI, passed to matplotlib.Figure()

 None

Returns:

Type Description
tuple[Figure, Axes, list[Line2D], NavigationToolbar2Tk]

tuple[Figure, Axes, list[Line2D], Toolbar]
Source code in mmg_toolbox/tkguis/misc/matplotlib.py 
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def ini_plot(frame: tk.Misc, figure_size: tuple[int, int] | None = None,
             figure_dpi: int | None = None) -> tuple[Figure, Axes, list[Line2D], NavigationToolbar2Tk]:
    """
    Create a lineplot on a tk canvas with toolbar

        fig, ax, line_list, toolbar = ini_plot(frame, figure_size, figure_dpi)
        line_list.extend(ax.plot(x, y))
        fig.canvas.draw()
        toolbar.update()

    :param frame: parent frame within which the figure will be placed.
    :param figure_size: size of the figure in inches [horiz, vert], passed to matplotlib.Figure()
    :param figure_dpi: figure DPI, passed to matplotlib.Figure()
    :returns: tuple[Figure, Axes, list[Line2D], Toolbar]
    """
    if figure_size is None:
        figure_size = FIGURE_SIZE
    if figure_dpi is None:
        figure_dpi = FIGURE_DPI

    # get the current background
    bg = get_style_background(frame)

    fig = Figure(figsize=figure_size, dpi=figure_dpi)
    try:
        fig.patch.set_facecolor(bg)
    except ValueError:
        print(f"Cannot set background color of {bg}")
        bg = '#dcdad5'
    # fig.subplots_adjust(left=0.2, bottom=0.2)
    # Amplitude
    ax1 = fig.add_subplot(111)
    ax1.set_autoscaley_on(True)
    ax1.set_autoscalex_on(True)
    ax1.set_xlabel(u'Axis 0')
    ax1.set_ylabel(u'Axis 1')
    ax1.set_title('filename')
    plot_list: list[plt.Line2D] = []

    frm = ttk.Frame(frame)
    frm.pack(side=tk.LEFT, expand=tk.YES, fill=tk.BOTH, pady=2, padx=5)
    canvas = FigureCanvasTkAgg(fig, frm)
    canvas.get_tk_widget().configure(bg='black')
    canvas.draw()
    canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=tk.YES, padx=5, pady=2)

    # Toolbar
    frm2 = ttk.Frame(frm)
    frm2.pack(side=tk.TOP, expand=tk.YES, fill=tk.BOTH, padx=5, pady=2)
    # toolbar = NavigationToolbar2Tk(canvas, frm)
    toolbar = CustomToolbar(canvas, frm2)
    toolbar.config(background=bg)
    toolbar.update()
    toolbar.pack(fill=tk.X)#, expand=tk.YES)
    return fig, ax1, plot_list, toolbar