convert normal GUI cordinates to normalized cordinates

How to convert normal GUI cordinates to normalized cordinates.

How to write a function for that?

[Jan]

It depends on what "normal GUI coordinates" and "normalized coordinates" are. This sound equal, doesn't it?

[Praneeti Mitra]

it is not same, because previously it was 1920, 1080 and now it is 0, 0, 1, 1

[Praneeti Mitra]

i want to write a function which can give me a X, Y for all the cordinates present in GUI and i can do the vice versa.I want to write a generic code

[Adam Danz]

How was your gui created? Is this in App Designer?

What units should the position vectors be in?

[Praneeti Mitra]

It is not created in app designer Units should normalized and right now its in points

[Adam Danz]

Then the solution in my answer should work. Have you tried it?

Answer 1

[Adam Danz]

The best solution would be to do the manual labor of changing the units for each component in the code that creates the GUI. It's as simple as copy/pasting this into each uicontrol line, if you're using that method to contruct the GUI, or as simple as setting the units to all components within GUIDE: ...,'Units','Normalize',.... It would take you less time to do that than the time you've waited to get this answer 😀.

But if you must do it programmatically, place this in your startup function or after all components have been generated. Not only does it change units to your selected units but it also returns all position vectors. If you want to remove that feature, remove lines that are followed by the comment "% POSITION DATA".

% Specify output Units
outUnits = 'normalized';

% Get figure handle
fig = _____________;  % FILL THIS IN WITH YOUR GUI'S FIGURE HANDLE

% Put all GUI object handles in a vector.  
figChil = ________________;   % VECTOR OF GUI OBJ HANDLES

% Eliminate objects that do not have a position or units property
isOK = isprop(figChil,'Position') & isprop(figChil,'Units'); 
figChil(~isOK) = []; 

% loop through each object and *try* to temporarily change 
% units to selected units.  If the unit-change fails, the object
% will be skipped. Some objects in some releases of Matlab
% do not accept all units.
% objPos is an nx2 cell array where col 1 contains object handles
% and col 2 contains 1x4 position properties in your specified units.
objPos = [num2cell(figChil(:)),cell(numel(figChil),1)];  % POSITION DATA
pass = true(numel(figChil),1);                           % POSITION DATA
for i = 1:numel(figChil)
    try
        figChil(i).Units = outUnits;
        objPos{i,2} = figChil(i).Position;               % POSITION DATA
    catch
        pass(i) = false;                                 % POSITION DATA
    end
end

To see the objects that have been converted to your specified units, this section places a red rectangle around all objects using normalized position values.

% Convert the cell array of 1x4 position vectors to an nx4 matrix.
% Note: Assumes all objs have 1x4 position vectors (unlike text objs for example)
allPosition = cell2mat(objPos(pass,2));        

% Verify positional units (for normalized units only!)
annotationObjs = gobjects(size(allPosition,1),1); 
for j = 1:size(allPosition,1)
    annotationObjs(j) = annotation(fig, 'rectangle', allPosition(j,:), 'Color','r','LineWidth',10);
end

Delete the verification rectangles

% Remove annotation outlines
 delete(annotationObjs)