importtkinterastkfrommatplotlib.figureimportFigurefrommatplotlib.backends.backend_tkaggimportFigureCanvasTkAggimportmatplotlibimportlogginglogging.basicConfig(level=logging.DEBUG,format="%(asctime)s - %(levelname)s - %(message)s")# --- Test with these values ---TARGET_WIDTH=1200TARGET_HEIGHT=800# --- If above fails, then try these ---# TARGET_WIDTH = 700# TARGET_HEIGHT = 600# --- ---classMRE_App:def__init__(self,master):self.master=mastermaster.title("Matplotlib Layout MRE")master.geometry(f"{TARGET_WIDTH}x{TARGET_HEIGHT}")self.fig_dpi=96# Fixed DPI# Option 1: Try with subplots_adjust (NO constrained_layout on Figure)self.fig=Figure(dpi=self.fig_dpi)logging.info("MRE: Using subplots_adjust approach.")# Option 2: Try with constrained_layout (comment out subplots_adjust in update_figure_size)# self.fig = Figure(dpi=self.fig_dpi, constrained_layout=True)# self.fig.set_constrained_layout_pads(w_pad=0.02, h_pad=0.02, wspace=0.03, hspace=0.03)# logging.info("MRE: Using constrained_layout approach.")self.ax1=self.fig.add_subplot(221)self.ax2=self.fig.add_subplot(222)self.ax3=self.fig.add_subplot(223)self.ax4=self.fig.add_subplot(224)fori,axinenumerate([self.ax1,self.ax2,self.ax3,self.ax4]):ax.plot([0,1], [i,i+1])ax.set_title(f"Ax{i+1}")ax.grid(True)self.canvas=FigureCanvasTkAgg(self.fig,master=master)self.canvas_widget=self.canvas.get_tk_widget()self.canvas_widget.pack(side=tk.TOP,fill=tk.BOTH,expand=True)self.canvas_widget.bind("<Configure>",self.on_resize)self.master.after(300,self.initial_draw)# Slightly longer delay for MRE toologging.info(f"MRE: Matplotlib version:{matplotlib.__version__}")try:logging.info(f"MRE: Tkinter version:{tk.TkVersion}, TclVersion:{tk.TclVersion}")except:logging.info("MRE: Could not get Tk/Tcl versions easily.")definitial_draw(self):logging.info("MRE: Initial draw triggered")self.master.update_idletasks()self.update_figure_size_and_layout()# Combined method# self.canvas.draw_idle() # update_figure_size_and_layout will call itdefon_resize(self,event):logging.debug(f"MRE: Configure event: w={event.width}, h={event.height}")ifevent.width<=1orevent.height<=1:returnself.update_figure_size_and_layout()defupdate_figure_size_and_layout(self):ifnot (hasattr(self,'canvas_widget')andself.canvas_widget.winfo_exists()):returnself.master.update_idletasks()# Ensure Tkinter sizes are accurate before querycanvas_width_px=self.canvas_widget.winfo_width()canvas_height_px=self.canvas_widget.winfo_height()logging.debug(f"MRE: Canvas current pixel size:{canvas_width_px}x{canvas_height_px}")ifcanvas_width_px>1andcanvas_height_px>1:new_fig_width_inches=canvas_width_px/self.fig.get_dpi()new_fig_height_inches=canvas_height_px/self.fig.get_dpi()current_width,current_height=self.fig.get_size_inches()size_changed=abs(current_width-new_fig_width_inches)>0.01or \abs(current_height-new_fig_height_inches)>0.01is_initial_draw=nothasattr(self.fig,'_mre_drawn_once')ifsize_changedoris_initial_draw:self.fig.set_size_inches(new_fig_width_inches,new_fig_height_inches,forward=True)logging.info(f"MRE: Figure resized to:{new_fig_width_inches:.2f}x{new_fig_height_inches:.2f} in. Initial:{is_initial_draw}")ifis_initial_draw:self.fig._mre_drawn_once=True# --- If testing subplots_adjust (Option 1 for self.fig creation) ---try:self.fig.subplots_adjust(left=0.10,bottom=0.10,right=0.95,top=0.92,wspace=0.25,hspace=0.25)logging.debug("MRE: Applied subplots_adjust.")exceptExceptionase:logging.error(f"MRE: Error in subplots_adjust:{e}")# --- If testing constrained_layout (Option 2 for self.fig creation) ---# if not self.fig.get_constrained_layout():#     self.fig.set_constrained_layout(True)#     logging.info("MRE: Constrained layout re-enabled.")# try:#     self.fig.set_constrained_layout_pads(w_pad=0.02, h_pad=0.02, wspace=0.03, hspace=0.03) # Match your app# except Exception as e:#     logging.error(f"MRE: Error setting constrained_layout_pads: {e}")self.canvas.draw_idle()logging.debug("MRE: Canvas draw_idle called.")else:logging.debug("MRE: Canvas too small to resize figure.")if__name__=='__main__':root=tk.Tk()app=MRE_App(root)root.mainloop()