Matlab GUI zoom - some controls zoom, some controls do not zoom - Design Tutorial

Here are matlab gui Scaling of design , Achieve one fig Zoom and non zoom design of any control in

Consider the actual needs here , The zoom GUI You don't want to scale all the controls when you , For example, I just want to scale the waveform displayed on the coordinate axis , The setting button and serial port configuration remain unchanged in position and size

If only according to matlab Examples on and most of the information on the Internet , This requirement cannot be met when scaling the configuration , It is necessary to consider how to realize such a design process

As shown in the diagram , Waveform size change , But to keep the button control unchanged

This requires a mechanism to achieve , The coordinates and size of the graph change with time figure The size is changing ;

according to matlab characteristic , The design steps are as follows ：

1. First set the overall scale , stay GUI Options , Pictured 1

 

  chart 1：gui Option setting

  At this time, the whole form and all controls can be scaled , There is no difference between all controls

2. Set the control to be non scalable separately , Modify... In properties Units In pixels pixels, Pictured 2, At this time, the button control cannot be scaled

 

  chart 2： The key is set to not zoom

That may ask , This is not to achieve the effect , Surely not. , Try it on your own ; This will cause the control to be in a fixed position , Although the size remains the same , But it can't be reached. The position changes with the size of the interface , Pictured 3;

  chart 3： Wrong effect

3. We are going to solve 2 Problems in

We observe the position characteristics of the control , Its location is similar to fig The position difference of the upper right corner of the is fixed , All we have to do is read fig After the coordinates of the upper right corner of , And then according to xy Difference value , Update the location information of the control

 

  With this picture, we know that as long as we guarantee Δx,Δy Keeping the same can make the position of the button control change with fig Keep the zoom changes consistent

In addition, I will introduce some information about coordinates ：

  stay gui There is coordinate display under the lowest design ： Current point ： Coordinates are where the mouse is located , Location ： Is the control we choose or fig Location information for , Here we choose fig, So what it shows is fig The location of , double-click fig Pop up properties , notice position Is consistent with this message ; modify position The value of can be changed fig Size ,xy Yes, it is on by default fig Where it is （ Starting point in the lower left corner ）; Of course, you choose other components , The location shows their corresponding information ;

In actual scaling, it changes automatically fig The size of is width、height The two values change fig size ;

Now what we have to do ：

First step ： It's reading fig Of width、height

First of all get fig Of pisition Information

figposition=get(gcf,'position');% Here we get fig Position value of figposition=[x y  width height ]

figwidth=figposition(3);% Width ,figposition It's a vector , Direct subscript reference is enough

figheight=figposition(4);% Height

The second step ： Set the position of the button x,y

set(handles.button,'position',[figwidth-Δx  figheight-Δx  width  height ]);

Δx Δy We started designing gui The difference determined when , This is for sure

4. The overall code

Here we choose fig Callback function for SizeChangedFcn To update the coordinate position of the button

function figure1_SizeChangedFcn(hObject, eventdata, handles)
% hObject    handle to figure1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
size=get(gcf,'Position');
SizePosition=[(size(3)-50) (size(4)-40) 41 24];
set(handles.open,'Position',SizePosition);

5. Demonstration effect ： After zooming , Button hold fig The position in the remains unchanged , The size is the same ; And the axis scaling is normal

Here are just buttons and axes as examples , The actual controls are scaled or not , It depends on the actual needs