Display three images in Matlab

runGui.m

function runGui()

	chosenFile = '';
	defScalingStr = {'2.0', '3.0', '4.0'};

	function btnLoad_click(hObj, event)
		[fileName, pathName] = uigetfile({ ...
			'*.bmp; *.png', 'Image Files (*.bmp,*.png)'; ...
			'*.*', 'All Files (*.*)'}, ...
			'Select an image');
		if ~isequal(fileName, 0)
			chosenFile = fullfile(pathName, fileName);
		end
	end

	function btnRun_click(hObj, event)
		scaling = str2double(defScalingStr{get(lstScaling, 'Value')});
		if isempty(scaling)
			set(lstScaling, 'String', defScalingStr{1});
			msgbox('Invalid scaling!');
			return;
		end

		if ~exist(chosenFile, 'file')
			msgbox('Please select an image.');
			return;
		end

		set(btnRun, 'Enable', 'off');
		onCleanup(@() set(btnRun, 'Enable', 'on'));
		drawnow;

		[interpolatedImg, rgbImg, highImg] = CDASR(chosenFile, scaling);
		subplot(1, 3, 1);
		imshow(interpolatedImg);
		xlabel('Low resolution image');
		subplot(1, 3, 2);
		imshow(rgbImg);
		xlabel('High resolution image');
		subplot(1, 3, 3);
		imshow(highImg);
		xlabel('Original high resolution image');
	end

	fHandle = figure('Name', 'Deep Autoencoder', ...
		'Visible', 'off', ...
		'NumberTitle', 'off', ...
		'Color', [0.9, 0.9, 0.9], ...
		'OuterPosition', [100 100 1000 600]);
	set(fHandle, 'MenuBar', 'none');
	set(fHandle, 'ToolBar', 'none');

	nGridX = 20;
	nGridY = 12;
	sizeScaling = [nGridX, nGridY, nGridX, nGridY];

	txtScaling = uicontrol('Style','edit', ...
		'String', 'Scaling', ...
		'Enable', 'inactive', ...
		'BackgroundColor', [0.9, 0.9, 0.9], ...
		'Units', 'normalized', ...
		'Position', [2.5, 10.5, 2, 1] ./ sizeScaling);
	lstScaling = uicontrol('Style', 'popupmenu', ...
		'String', defScalingStr, ...
		'Units', 'normalized', ...
		'Position', [5, 10.5, 2.5, 1] ./ sizeScaling);
	btnLoad = uicontrol('Style', 'pushbutton', ...
		'String', 'Select image', ...
		'Units', 'normalized', ...
		'Position', [10.5, 10.5, 3, 1] ./ sizeScaling, ...
		'Callback', {@btnLoad_click});
	btnRun = uicontrol('Style', 'pushbutton', ...
		'String', 'Run SR', ...
		'Units', 'normalized', ...
		'Position', [14.5, 10.5, 3, 1] ./ sizeScaling, ...
		'Callback', {@btnRun_click});

	for ctrl = {txtScaling, lstScaling, btnLoad, btnRun}
		c = ctrl{1};
		set(c, 'FontSize', 10);
		set(c, 'FontName', 'Segoe UI');
	end
	
	set(fHandle, 'Visible', 'on');
end