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CrampFit.m
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CrampFit.m
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classdef CrampFit < handle
%CRAMPFIT: Analysis suite for streaming signal data
%
% ---------------------------------------------------------------------
%
% CRAMPFIT Usage:
% Adjusting view
% - Scrolling over a plot zooms the x-axis about the cursor position.
% - Scrolling over a y-axis zooms that y axis about the cursor position.
% - Middle-click and drag pans the plot.
% - Right-clicking brings up the signal context menu.
% - Left-click and drag on axes to zoom.
% - Press 'a' to autoscale all axes.
%
% Cursors
% - Double-click to bring cursors.
% - Click and drag cursors to move them.
% - Press 'c' to show/hide cursors.
%
% Press 'Escape' to quit at any time.
%
% ---------------------------------------------------------------------
%
% CRAMPFIT Methods:
% CrampFit(fname) - Starts CrampFit. Filename can be empty, a
% filename, or a directory where your files are stored.
% loadFile(fname) - Loads a file, if it can find it. If IV curve is
% selected, forwards to plot_iv. Creates default signal panels.
%
% setKeyboardCallback(fun) - Sets the keyboard callback function for
% user code. fun should take one argument, a struct, containing
% the key information.
% waitKey() - Blocks until a key is pressed. Returns character of the
% key (not a struct), eg 'k'.
%
% addSignalPanel(sigs) - Add a signal panel, at the bottom, that
% displays the signals specified in sigs. Can be [].
% removeSignalPanel(panel) - Remove signal panel indexed by panel
% setSignalPanel(panel,sigs) - Sets panel to display signals sigs.
%
% getAxes(pan) - Get the axes object handle for a given panel
% clearAxes() - Clear all user-drawn objects from all axes
%
% autoscaleY() - Rescale Y-axes on all panels
%
% getCursors() - Return cursor positions, or [] if hidden
% setCursors(trange) - Sets cursor positions and makes them visible
% toggleCursors() - Toggles visibility of cursors
%
% refresh() - Redraws all plot displays.
% getView() - Returns time range visible in window.
% setView(trange) - Sets visible time range (clipping appropriately) and redraws.
%
% ---------------------------------------------------------------------
%
% CRAMPFIT Properties:
% data - Internal SignalData class, or [] if not loaded
% fig - Handle to figure object of program
% psigs - Struct array with signal panel information. Click for more.
%
% ---------------------------------------------------------------------
%
%
%
properties
data % Internal SignalData class, or [] if not loaded
fig % Handle to figure object
% psigs - Struct array containing information about signal panels,
% as well as some internally defined helper functions.
%
% psigs(i).sigs - List of signals to display.
% psigs(i).axes - Axes object displaying signals
% psigs(i).setY(yrange) - Sets y-axis.
% psigs(i).getY() - Gets y-axis.
% psigs(i).resetY() - Autoscales y intelligently to look nice.
% psigs(i).shiftY(scale,offset) - Scales and moves y-axis. Offset
% is in units of the current y-range.
%
% There are some others that should not be important.
psigs
end
properties (Hidden=true)
DEFS % UI definitions (widths etc.)
panels % Main window panel handle struct
xaxes % x-axis object
cursors % Main window cursor object (blue arrow thingies)
ctext % Cursor display text handle
hcmenu % Handle to context menu
sigmenus % Handles to all the add/remove signal menus
cursig % Most recent signal clicked
end
methods
function obj = CrampFit(fname)
% cf = CRAMPFIT() - Create a new default instance of CrampFit
% cf = CRAMPFIT(filename) - Start by loading specified file
% cf = CRAMPFIT(directory) - Start in a directory (for open file dialog)
% some UI defs
obj.DEFS = [];
obj.DEFS.LEFTWID = 60;
obj.DEFS.BOTHEIGHT = 60;
obj.DEFS.BUTWID = 20;
obj.DEFS.BUTLEFT = 3;
obj.DEFS.BUTBOT = 3;
obj.DEFS.LABELWID = 200;
obj.DEFS.CURSCOLOR = [0 0.5 0.5];
% start making GUI objects
obj.fig = figure('Name','CrampFit','MenuBar','none',...
'NumberTitle','off','DockControls','off');
% set its position
oldunits = get(obj.fig,'Units');
set(obj.fig,'Units','normalized');
set(obj.fig,'Position',[0.1,0.1,0.8,0.8]);
set(obj.fig,'Units',oldunits);
% Build a new color map
CO = [ 0.0 0.2 0.7;...
0.0 0.5 0.0;...
0.7 0.1 0.1;...
0.0 0.6 0.6;...
0.5 0.0 0.5;...
0.6 0.6 0.3 ];
% Set the color order
set(obj.fig, 'DefaultAxesColorOrder', CO);
if nargin == 0
fname = '';
end
% how we load a new file
function openFileFcn(~,~)
% check if we've loaded a file yet
if ~isempty(obj.data)
% if we did, let's use that filename
fn = obj.data.filename;
else
% were we passed a directory, not file?
fn = fname;
end
% get a filename from dialog box
[FileName,PathName] = uigetfile('*.abf;*.cbf','CrampFit',fn);
% and load (or attempt to)
obj.loadFile([PathName FileName]);
end
% make the menu bar
f = uimenu('Label','File');
uimenu(f,'Label','Open','Callback',@openFileFcn);
uimenu(f,'Label','Quit','Callback',@(~,~) close(obj.fig));
c = uimenu('Label','Cursors');
uimenu(c,'Label','Bring','Callback',@(~,~) obj.bringCursors());
uimenu(c,'Label','Show/Hide','Callback',@(~,~) obj.toggleCursors());
hm = uimenu('Label','Help');
uimenu(hm,'Label','CrampFit','Callback',@(~,~) doc('CrampFit.m'));
uimenu(hm,'Label','SignalData','Callback',@(~,~) doc('SignalData.m'));
uimenu(hm,'Label','About','Callback',@(~,~) msgbox({'CrampFit written by Tamas Szalay, April 2014.' ...
'This program and its author are not affiliated with Molecular Devices.'},'About CrampFit'));
% and the context menus
obj.hcmenu = uicontextmenu();
obj.sigmenus = [];
sa = uimenu(obj.hcmenu,'Label','Add Signal');
st = uimenu(obj.hcmenu,'Label','Set Signal');
snew = uimenu(obj.hcmenu,'Label','Add Panel','Separator','on',...
'Callback',@(~,~) obj.addSignalPanel(obj.psigs(obj.cursig).sigs));
srem = uimenu(obj.hcmenu,'Label','Remove Panel',...
'Callback',@(~,~) obj.removeSignalPanel(obj.cursig));
% populate signals submenu function
function addsig(sig)
% append sig to the list of this signal panel's signals
obj.psigs(obj.cursig).sigs = [obj.psigs(obj.cursig).sigs sig];
% and redraw
obj.refresh();
end
function popSigMenuFcn(~,~)
% delete the old ones
delete(obj.sigmenus);
if isempty(obj.data)
return
end
% get signal list, if we have one
slist = obj.data.getSignalList();
obj.sigmenus = [];
% create the menus
for i=2:length(slist)
obj.sigmenus(end+1) = uimenu(sa,'Label',slist{i});
set(obj.sigmenus(end),'Callback',@(~,~) addsig(i));
end
% and to set
for i=2:length(slist)
obj.sigmenus(end+1) = uimenu(st,'Label',slist{i});
set(obj.sigmenus(end),'Callback',@(~,~) obj.setSignalPanel(obj.cursig,i));
end
end
set(obj.hcmenu,'Callback',@popSigMenuFcn);
obj.cursig = 0;
% the main layout components
obj.panels = [];
obj.panels.Middle = uipanel('Parent',obj.fig,'Position',[0 0.5 1 0.5],'Units','Pixels');
obj.panels.Bottom = uipanel('Parent',obj.fig,'Position',[0 0.5 1 0.5],'Units','Pixels');
set(obj.panels.Bottom,'BorderType','none');
set(obj.panels.Middle,'BorderType','none');
% handles the resizing of the main panels
function mainResizeFcn(~,~)
sz = getPixelPos(obj.fig);
set(obj.panels.Bottom,'Position',[1,0,sz(3)+2,obj.DEFS.BOTHEIGHT]);
% set this guy outside the edges of the figure by one pixel
% horizontally, to hide the border on the sides
set(obj.panels.Middle,'Position',[0,obj.DEFS.BOTHEIGHT,sz(3)+2,sz(4)-obj.DEFS.BOTHEIGHT]);
end
set(obj.fig,'ResizeFcn',@mainResizeFcn);
mainResizeFcn
% ========== X AXIS CODE ===========
% make an x-axis for display porpoises only. this will need to
% get resized correctly later, sadly :-/
hxaxes = axes('Parent',obj.panels.Bottom,'TickDir','out',...
'Position',[0 1 1 0.01],'YTickLabel','',...
'YLimMode','manual','XLimMode','manual');
obj.xaxes = hxaxes;
% create dummy cursor lines in the x-axis that the real
% cursor objects can copy
% and, conveniently, use them to display little arrows
obj.cursors = [line() line()];
set(obj.cursors,'Parent',obj.xaxes,'XData',[0 0],...
'YData',[-3 -3],'Visible','off','Tag','CFCURS',...
'Color',obj.DEFS.CURSCOLOR,'Marker','^',...
'MarkerFaceColor',obj.DEFS.CURSCOLOR,'MarkerSize',5,...
'Clipping','off','LineStyle','none');
% again, screw scroll bars
function shiftX(zoom,offset)
xlim = get(hxaxes,'XLim');
dx = xlim(2)-xlim(1);
xm = mean(xlim);
xlim = xm+zoom*(xlim-xm);
xlim = xlim+dx*offset;
obj.setView(xlim);
end
% now make the buttons
nbut = 5;
buts = zeros(nbut,1);
buts(1) = uicontrol('Parent', obj.panels.Bottom, 'String','<html>-</html>',...
'callback', @(~,~) shiftX(2,0));
buts(2) = uicontrol('Parent', obj.panels.Bottom, 'String','<html>←</html>',...
'callback', @(~,~) shiftX(1,-0.25));
buts(3) = uicontrol('Parent', obj.panels.Bottom, 'String','<html>R</html>',...
'callback', @(~,~) obj.setView());
buts(4) = uicontrol('Parent', obj.panels.Bottom, 'String','<html>→</html>',...
'callback', @(~,~) shiftX(1,0.25));
buts(5) = uicontrol('Parent', obj.panels.Bottom, 'String','<html>+</html>',...
'callback', @(~,~) shiftX(0.5,0));
% and create a text-box in the bottom-right to hold the dt
% (time between cursors)
obj.ctext = uicontrol('Parent',obj.panels.Bottom,...
'Style','text','Units','Pixels','Position',[0 0 1 1],...
'Tag','Cursor dt: %0.3f %s ','FontSize',10,...
'HorizontalAlignment','right','Visible','off');
uistack(obj.ctext,'bottom');
l = linkprop([obj.ctext obj.cursors(1)],'Visible');
set(obj.ctext,'UserData',l);
% how to move buttons when thingy gets resized
function resizeFcn(~,~)
% get height of panel in pixels
sz = getPixelPos(obj.panels.Bottom);
% figure out where the middle is
mid = sz(3)/2;
for i=1:nbut
% position the buttons
set(buts(i),'Position',[mid+(i-nbut/2-1)*obj.DEFS.BUTWID,obj.DEFS.BUTBOT,obj.DEFS.BUTWID,obj.DEFS.BUTWID]);
end
% also need to resize x-axis labels
set(obj.xaxes,'Units','Pixels');
set(obj.xaxes,'Position',[sz(1)+obj.DEFS.LEFTWID,sz(4)+2,sz(3)-obj.DEFS.LEFTWID,1]);
% and tick length
s = 6/max(sz(3:4));
set(obj.xaxes,'TickLength',s*[1 1]);
% now position the stupid label thing
set(obj.ctext,'Position',[sz(3)-obj.DEFS.LABELWID 1 obj.DEFS.LABELWID 20]);
end
% set the resize function
set(obj.panels.Bottom, 'ResizeFcn', @resizeFcn);
% and call it to set default positions
resizeFcn
% ========== FINISHING TOUCHES ===========
% create drag/drop functions, etc
obj.setMouseCallbacks();
% and a dummy keyboard callback
obj.setKeyboardCallback(@(e) []);
% create a blank signal panel and blank data
obj.data = [];
obj.addSignalPanel([]);
% load data if we were called with a filename
% this also creates default signal panels
if (nargin > 0)
obj.loadFile(fname);
end
end
end
methods (Hidden = true)
function setMouseCallbacks(obj)
% obj.SETMOUSECALLBACKS()
% Creates mouse callback interface, by defining a ton of fns
% point-rectangle hit test utility function
function b = isIn(pos,p)
b = false;
if (pos(1) > p(1) && pos(1) < (p(1)+p(3)) &&...
pos(2) > p(2) && pos(2) < (p(2)+p(4)))
b = true;
end
end
% function that steps through all relevant objects to figure
% out which one is at a given position
function [hnd,ind,pt,s] = getHandleAt(pos)
% pos should be in pixels
if nargin < 1
pos = get(obj.fig,'CurrentPoint');
end
% first, let's check signals
nsig = length(obj.psigs);
for i=1:nsig
ind = i;
% did we click on a plot?
if isIn(pos,getpixelposition(obj.psigs(i).axes,true))
hnd = obj.psigs(i).axes;
pt = get(hnd,'CurrentPoint');
pt = pt(1,1:2);
s = 'a';
obj.cursig = ind;
return;
end
% are we over the y axis part?
if (isIn(pos,getpixelposition(obj.psigs(i).panel,true)) &&...
pos(1) > 0.6*obj.DEFS.LEFTWID)
% return the handle to the main axes anyway, s'more
% useful that way
hnd = obj.psigs(i).axes;
pt = get(hnd,'CurrentPoint');
pt = pt(1,1:2);
s = 'y';
obj.cursig = ind;
return;
end
end
% ok, not signals, so let's check x-axis
if (isIn(pos,getpixelposition(obj.panels.Bottom)) &&...
pos(2) > 0.6*obj.DEFS.BOTHEIGHT)
hnd = obj.xaxes;
ind = -1;
pt = get(hnd,'CurrentPoint');
pt = pt(1,1:2);
s = 'x';
obj.cursig = 0;
return;
end
hnd = -1;
ind = -1;
pt = [];
s = '';
obj.cursig = 0;
end
% handles scrolling zoom in-out
function scrollCallback(~,e)
% figure out what we are over, if anything
[hnd,ind,pt,s] = getHandleAt();
% quit if found nothing
if (hnd==-1)
return
end
if (s == 'y')
% we're scrolling inside a y-axis, scroll y-lims
pty = pt(2);
ylim = obj.psigs(ind).getY();
s = 0.5*e.VerticalScrollCount;
ylim = sort(pty + (1+s)*(ylim-pty));
obj.psigs(ind).setY(ylim);
elseif (s == 'a' || s == 'x')
% we're scrolling in a plot, scroll the time axis
ptx = pt(1);
xlim = get(obj.xaxes,'XLim');
s = 0.5*e.VerticalScrollCount;
xlim = sort(ptx + (1+s)*(xlim-ptx));
obj.setView(xlim);
end
end
function mouseMoveX(r)
% get start and current point
pt0 = get(obj.xaxes,'UserData');
pt1 = get(obj.xaxes,'CurrentPoint');
% convert to x-range
xr = sort([pt0(1) pt1(1,1)]);
% update the line
set(r,'YData',[0,0],'XData',xr,'LineWidth',8);
end
function mouseMoveY(r,ind)
% get start and current point
pt0 = get(obj.psigs(ind).yaxes,'UserData');
pt1 = get(obj.psigs(ind).yaxes,'CurrentPoint');
% y-range, sorted
yr = sort([pt0(2) pt1(1,2)]);
% set x limits of y-line
xl = get(obj.psigs(ind).yaxes,'XLim');
% and update the line
set(r,'XData',[xl(1),xl(1)],'YData',yr,'LineWidth',5);
end
function mouseUpX(r)
% kill the line
delete(r);
% get the x-range one last time
pt0 = get(obj.xaxes,'UserData');
pt1 = get(obj.xaxes,'CurrentPoint');
xrange = sort([pt0(1) pt1(1,1)]);
% make sure we zoomed at all
if xrange(1)==xrange(2)
return
end
% then update the view
obj.setView(xrange);
% and clear callbacks
set(obj.fig,'WindowButtonUpFcn','');
set(obj.fig,'WindowButtonMotionFcn','');
end
function mouseUpY(r,ind)
% kill the line
delete(r);
% y-range as usual
pt0 = get(obj.psigs(ind).yaxes,'UserData');
pt1 = get(obj.psigs(ind).yaxes,'CurrentPoint');
yrange = sort([pt0(2) pt1(1,2)]);
if yrange(1)==yrange(2)
return
end
% zoom in
obj.psigs(ind).setY(yrange);
% and clear callbacks
set(obj.fig,'WindowButtonUpFcn','');
set(obj.fig,'WindowButtonMotionFcn','');
end
function mouseMovePan(ind)
% this is the doozy
pt0 = get(obj.psigs(ind).yaxes,'UserData');
pt1 = get(obj.psigs(ind).axes,'CurrentPoint');
pt1 = pt1(1,1:2);
% so we want to get pt0 and pt1 equal
% to get that guy under the mouse
dpt = pt1-pt0;
% and x axis
xl = get(obj.xaxes,'XLim');
obj.setView(xl - dpt(1));
% now update y-axis
yl = obj.psigs(ind).getY();
obj.psigs(ind).setY(yl-dpt(2));
end
function mouseUpPan()
% clear callbacks
set(obj.fig,'WindowButtonUpFcn','');
set(obj.fig,'WindowButtonMotionFcn','');
end
% and create their mouse down callbacks
function mouseMoveCursor(ind,cursind)
% get dragged point
pt = get(obj.psigs(ind).axes,'CurrentPoint');
% now update cursor positions
curs = obj.getCursors();
curs(cursind) = pt(1);
obj.setCursors(curs);
end
function mouseUpCursor()
% clear callbacks
set(obj.fig,'WindowButtonUpFcn','');
set(obj.fig,'WindowButtonMotionFcn','');
end
% the main mouse down dispatch function
function mouseDown(~,~)
% figure out what we are over, if anything
[hnd,ind,pt,s] = getHandleAt();
sel = get(obj.fig,'SelectionType');
if (hnd == -1)
return
end
% see if we are dragging on x or y axes
if (s == 'x' && strcmp(sel,'normal'))
% make a line
r = line();
set(r,'Parent',obj.xaxes);
% store the drag start point
set(obj.xaxes,'UserData',pt);
% and set appropriate callbacks, with line as data
set(obj.fig,'WindowButtonUpFcn',@(~,~) mouseUpX(r));
set(obj.fig,'WindowButtonMotionFcn',@(~,~) mouseMoveX(r));
elseif (s == 'y' && strcmp(sel,'normal'))
% make a line
r = line();
set(r,'Parent',obj.psigs(ind).yaxes);
% store the drag start point
set(obj.psigs(ind).yaxes,'UserData',pt);
% and set appropriate callbacks, with line as data
set(obj.fig,'WindowButtonUpFcn',@(~,~) mouseUpY(r, ind));
set(obj.fig,'WindowButtonMotionFcn',@(~,~) mouseMoveY(r, ind));
elseif (s == 'a' && strcmp(sel,'extend'))
% store the drag start point
set(obj.psigs(ind).yaxes,'UserData',pt);
% and set the callbacks
set(obj.fig,'WindowButtonUpFcn',@(~,~) mouseUpPan());
set(obj.fig,'WindowButtonMotionFcn',@(~,~) mouseMovePan(ind));
elseif (s == 'a' && strcmp(sel,'open'))
obj.bringCursors();
elseif (s == 'a' && strcmp(sel,'normal'))
% click-drag a cursor?
cursind = find(get(obj.fig,'CurrentObject') == obj.psigs(ind).cursors,1);
if ~isempty(cursind)
% set the callbacks
set(obj.fig,'WindowButtonUpFcn',@(~,~) mouseUpCursor());
set(obj.fig,'WindowButtonMotionFcn',@(~,~) mouseMoveCursor(ind,cursind));
end
end
end
% set global figure callbacks
set(obj.fig,'WindowScrollWheelFcn',@scrollCallback);
set(obj.fig,'WindowButtonDownFcn',@mouseDown);
end
end
methods (Hidden = false)
function loadFile(obj, fname)
% obj.LOADFILE(filename)
% Loads the specified file, and initializes the signal panels
% attempt to load data
d = SignalData(fname);
if d.ndata < 0
if (d.ndata == -2)
disp('IV curve found, attempting load...');
plot_iv(fname);
end
return
end
% get last bit of filename
[~,fn,ext] = fileparts(fname);
% and set title bar
set(obj.fig,'Name',['CrampFit - ' fn ext]);
% set internal data
obj.data = d;
% first, delete all panels
while ~isempty(obj.psigs)
obj.removeSignalPanel();
end
% then, create right number of panels
for i=1:obj.data.nsigs
obj.addSignalPanel(i+1);
end
% and reset view
obj.setView();
% and cursors
obj.setCursors(obj.getView());
obj.toggleCursors();
end
function setKeyboardCallback(obj, fun)
% obj.SETKEYBOARDCALLBACK(fun)
% CrampFit will call fun whenever a key is pressed (except
% for default keys). The function should take a single
% argument, which is a Matlab keyboard event struct with
% fields e.Characer, e.Key, e.Modifier.
% define our own internal keyboard function
function keyboardFcn(~,e)
if e.Character == 'a'
% autoscale axes
for i=1:length(obj.psigs)
obj.psigs(i).resetY();
end
return
end
if e.Character == 'c'
obj.toggleCursors();
return
end
if strcmp(e.Key,'escape')
close(obj.fig);
return
end
% just in case we're waiting for a blocking keyboard event
% we should make sure it happens
uiresume(obj.fig);
% and then pass it on to the user-defined function
% (but only if a real key was pressed, not just shift etc)
if ~any(strcmp(e.Key,{'shift','control','alt'}))
fun(e);
end
end
set(obj.fig,'WindowKeyPressFcn',@keyboardFcn);
end
function k = waitKey(obj)
% k = obj.WAITKEY()
% Blocks until a (non-builtin) key is pressed. Returns the
% key character only (eg. 'k').
% wait for uiresume event
uiwait(obj.fig);
% key was pressed, fetch it
k = get(obj.fig,'CurrentCharacter');
end
function addSignalPanel(obj, sigs)
% obj.addSignalPanel(sigs)
% Add a new signal panel at the bottom with the specified
% signals (can be []).
% make a new one at the end
i = length(obj.psigs)+1;
if (i==1)
obj.psigs = obj.makeSignalPanel();
else
obj.psigs(i) = obj.makeSignalPanel();
end
% save which signals we want to draw
obj.psigs(i).sigs = sigs;
% and redo their sizes
obj.sizeSignalPanels()
% and refresh the view, without changing x-limits
if i==1
% or just reset, if it's the first panel
% (which it really shouldn't be?)
obj.setView();
else
obj.refresh();
end
% autoset the y-limits
obj.psigs(i).resetY();
end
function removeSignalPanel(obj, pan)
% obj.removeSignalPanel()
% obj.removeSignalPanel(pan)
% Remove the specified signal panel, or the bottommost one.
% Cannot remove all of them.
% just remove the topmost one if none specified
if (nargin < 2)
pan = 1;
end
% already deleted all of them
if isempty(obj.psigs) || (nargin == 2 && length(obj.psigs)==1)
return
end
% otherwise, delete the panel object
delete(obj.psigs(pan).panel);
% and remove it from the array
obj.psigs = obj.psigs((1:length(obj.psigs))~=pan);
% and resize!
obj.sizeSignalPanels();
end
function setSignalPanel(obj, pan, sigs)
% obj.setSignalPanel(pan,sigs)
% Set the specified signal panel to have signal sigs.
obj.psigs(pan).sigs = sigs;
obj.refresh();
end
end
methods (Hidden=true)
function sizeSignalPanels(obj)
% obj.sizeSignalPanels()
% Set the sizes of the panels on the screen to be evenly
% split vertically. Internal function.
np = length(obj.psigs);
for i=1:np
set(obj.psigs(i).panel,'Position',[0 (np-i)/np 1 1/np]);
end
end
function sig = makeSignalPanel(obj)
% sig = obj.makeSignalPanel()
% This makes a single panel. Positioning/tiling is taken
% care of externally after creation. Returns a struct
% containing handles and view functions.
% create and ultimately return a struct containing panel info
sig = [];
% which data to view? (none by default)
sig.sigs = [];
% make a panel to hold the entire thing
sig.panel = uipanel('Parent',obj.panels.Middle,'Position',[0 0 1 1],'Units','Normalized');
% give it a stylish border
set(sig.panel,'BorderType','line','BorderWidth',1);
set(sig.panel,'HighlightColor','black');
% first make a fake axes object that just displays the label
sig.yaxes = axes('Parent',sig.panel,'Position',[0 0 1 1],...
'TickDir','out','Box','off','XLimMode','manual');
% and then the main axes object for showing data
sig.axes = axes('Parent',sig.panel,'Position',[0 0 1 1],...
'XTickLabel','','YTickLabel','','GridLineStyle','-',...
'XColor', 0.85*[1 1 1],'YColor', 0.85*[1 1 1]);
% let's bind the context menu here as well
set(sig.axes,'uicontextmenu',obj.hcmenu);
% equivalent to 'hold on'
set(sig.axes,'NextPlot','add','XLimMode','manual');
% and gridify it
set(sig.axes,'XGrid','on','YGrid','on','Tag','CFAXES');
% magic function to make Y-axes consistent, saving me some
% bookkeeping headaches and stuff
l = linkprop([sig.yaxes sig.axes],{'YLim'});
set(sig.axes,'UserData',l);
% screw scroll bars, you never need to scroll the current trace
% so we'll just do buttons instead
% the callback scales the y limits of things
function ylim = getY()
ylim = get(sig.axes,'YLim');
end
function setY(ylim)
ylim = sort(ylim);
if (ylim(2)-ylim(1)) < 1e-10
return
end
set(sig.axes,'YLimMode','manual');
set(sig.axes,'YLim',ylim);
end
function resetY()
% let Matlab scale our axes, but don't scale to user-added
% objects or to data cursors
% so first we make them all invisible
cvis = get(obj.cursors(1),'Visible');
hs = findobj(sig.axes,'-not','Tag','CFPLOT');
set(hs,'Visible','off');
set(sig.axes,'YLimMode','auto');
ylim = getY();
% and then make them visible again
set(hs,'Visible','on');
% and restore data cursor visibility to previous value
set(obj.cursors,'Visible',cvis);
setY(ylim);
% zoom out a tiny bit to make it visually pleasing
shiftY(1.25,0);
end
function shiftY(zoom,offset)
ylim = getY();
dy = ylim(2)-ylim(1);
ym = mean(ylim);
ylim = ym+zoom*(ylim-ym);
ylim = ylim+dy*offset;
setY(ylim);
end
% save the y-limit functions to our little struct
sig.shiftY = @shiftY;
sig.setY = @setY;
sig.resetY = @resetY;
sig.getY = @getY;
% make the cursors, and start them off invisible
sig.cursors = [line() line()];
set(sig.cursors,'Parent',sig.axes,'XData',[5 5],'YData',1e3*[-1 1],...
'Color',obj.DEFS.CURSCOLOR,'Visible','off','Tag','CFCURS');
% link their properties to the dummy x-axis cursor
% this way we never have to think about it
for j=1:2
l = linkprop([obj.cursors(j) sig.cursors(j)],{'XData','Visible'});
set(sig.cursors(j),'UserData',l);
set(sig.cursors(j),'Visible','off');
end
% now make the buttons
nbut = 5;
% store the handles in a little array
buts = zeros(nbut,1);
% buts isn't getting put in sig, because we don't need to
% touch it from the outside...
buts(1) = uicontrol('Parent', sig.panel, 'String','<html>-</html>',...
'callback', @(~,~) sig.shiftY(2,0));
buts(2) = uicontrol('Parent', sig.panel, 'String','<html>↓</html>',...
'callback', @(~,~) sig.shiftY(1,-0.25));
buts(3) = uicontrol('Parent', sig.panel, 'String','<html>A</html>',...
'callback', @(~,~) sig.resetY());
buts(4) = uicontrol('Parent', sig.panel, 'String','<html>↑</html>',...
'callback', @(~,~) sig.shiftY(1,0.25));
buts(5) = uicontrol('Parent', sig.panel, 'String','<html>+</html>',...
'callback', @(~,~) sig.shiftY(0.5,0));
% how to move buttons when thingy gets resized
function resizeFcn(~,~)
% get height of panel in pixels
sz = getPixelPos(sig.panel);
% figure out where the middle is
mid = sz(4)/2;
for i=1:nbut
% position the buttons
set(buts(i),'Position',...
[obj.DEFS.BUTLEFT,mid+(i-nbut/2-1)*obj.DEFS.BUTWID,obj.DEFS.BUTWID,obj.DEFS.BUTWID]);
end
% now position the axes objects too
set(sig.axes,'Units','Pixels');
set(sig.yaxes,'Units','Pixels');
sz(1) = sz(1) + obj.DEFS.LEFTWID;
sz(3) = sz(3) - obj.DEFS.LEFTWID;
% set bottom to 1
sz(2) = 1;
set(sig.axes,'Position',sz);
sz(1) = sz(1) + 1;
set(sig.yaxes,'Position',sz);
% now do some ticklength calcs
s = 5/max(sz(3:4));
set(sig.yaxes,'TickLength',s*[1 1]);
end
% set the resize function
set(sig.panel, 'ResizeFcn', @resizeFcn);
% and call it to set default positions
resizeFcn
end
end
methods
function h = getAxes(obj, ind)
% h = obj.getAxes(panel)
% Returns a handle to the axes object on a particular signal
% panel, so user can draw on it.
h = obj.psigs(ind).axes;
end
function clearAxes(obj)
% obj.clearAxes()
% Clears all user-added objects from all axes.
for i=1:length(obj.psigs)
% find objects with empty tags, and kill them
hs = findobj(obj.psigs(i).axes,'Tag','');
delete(hs);
end
end
function autoscaleY(obj)
% obj.autoscaleY()
% Autoscales y-axes in all panels, ignoring user-drawn
% objects.
for i=1:length(obj.psigs)
obj.psigs(i).resetY();
end
end
function bringCursors(obj)
% obj.bringCursors()
% Brings cursors to the view window and makes them visible.
xlim = obj.getView();
xm = mean(xlim);
xlim = xm+0.5*(xlim-xm);
obj.setCursors(xlim);
end
function toggleCursors(obj)
% obj.toggleCursors()
% Toggle cursor visibility
cvis = get(obj.cursors(1),'Visible');
if strcmp(cvis,'on')
set(obj.cursors,'Visible','off');
else
set(obj.cursors,'Visible','on');
end
end
function curs = getCursors(obj)
% curs = obj.getCursors()
% Gets cursor positions, or [] if they are not visible.
% return empty if they're invisible
if strcmp(get(obj.cursors(1),'Visible'),'off')
curs = [];
return
end
% otherwise return their positions
curs = zeros(1,2);
for i=1:2
curs(i) = mean(get(obj.cursors(i),'XData'));
end
% return in proper time-order i guess
curs = sort(curs);
end
function setCursors(obj, curs)
% obj.setCursors(curs)
% Set cursor positions and make them visible.
curs = sort(curs);
for i=1:2
set(obj.cursors(i),'XData',[curs(i) curs(i)],'Visible','on');
end
% now update the dt label
dt = curs(2) - curs(1);
s = 's';
if (dt < 1e-3)
dt = dt * 1e6;
s = 'us';
elseif (dt < 1)
dt = dt * 1e3;
s = 'ms';
end
% the format string is hidden in ctext's tag
set(obj.ctext,'String',sprintf(get(obj.ctext,'Tag'),dt,s));
end
function refresh(obj)
% obj.refresh()
% Just refresh the view and force a redraw.
obj.setView(obj.getView());
end
function xlim=getView(obj)
% xlim = obj.getView()
% Returns x-limits of current screen.
xlim = get(obj.xaxes,'XLim');
end
function setView(obj,rng)
% obj.setView(xlim)
% Sets the x-limits (with bounding, of course). Also
% reloads/redraws everything.
% if we don't have anything loaded, get outta here
if isempty(obj.data)
return
end
% also, check if we got a range at all or not
if (nargin < 2)
range = [obj.data.tstart obj.data.tend];
else