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rINSTCONTROL/@MyAppMechanics/MyAppMechanics.asv
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MyAppMechanics.asv
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% The class contains methods for interaction with AppDesigner guis
classdef MyAppMechanics < handle
properties (Access = public)
Instr;
linkedElementsList = {} % list of Gui control elements
% which have counterpart properties
end
methods (Access = public)
function this=MyAppMechanics(Instrument)
this.Instr=instrument;
end
function linkControlElement(this, elem, prop_tag, varargin)
p=inputParser;
addRequired(p,'elem');
addRequired(p,'prop_tag',@ischar);
addParameter(p,'input_presc',1,@isnumeric);
addParameter(p,'auto_callback',false, @islogical);
parse(p,elem,prop_tag,varargin{:});
% The property-control link is established by assigning the tag
% and adding the control to the list of linked elements
elem.Tag = prop_tag;
this.linkedElementsList = [this.linkedElementsList, elem];
% If the auto callback flag is set, assign the default
% ValueChangedFcn which passes the field input to the instument
if p.Results.auto_callback
elem.ValueChangedFcn = createCallbackFcn(this,...
@(src, event)genericValueChanged(src, event), true);
end
% If the prescaler is indicated, add it to the element as a new property
if p.Results.input_presc ~= 1
if isprop(elem, 'InputPrescaler')
warning('The InputPrescaler propety already exists in the control element');
else
addprop(elem,'InputPrescaler');
end
elem.InputPrescaler = p.Results.input_presc;
end
end
% update all the linked control elements according to their counterpart properties
function updateGui(this)
for i=1:length(this.linkedElementsList)
tmpelem = this.linkedElementsList(i);
tmpval = this.Instr.(tmpelem.Tag);
% scale the value if the control element has a prescaler
if isprop(tmpelem, 'InputPrescaler')
tmpval = tmpval*tmpelem.InputPrescaler;
end
tmpelem.Value = tmpval;
end
end
function genericValueChanged(this, event)
val = event.Value;
% scale the value if the control element has a prescaler
if isprop(event.Source, 'InputPrescaler')
val = val/event.Source.InputPrescaler;
end
this.Instr.writePropertyHedged(event.Source.Tag, val);
this.updateGui();
end
end
end
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