MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manual de usuario descargar pdf (Pagina 382)

100

101

10 Lay Out a Programmatic UI

10-50

The button Position is set, returned and placed on the system clipboard:

rect =

37 362 127 27

Add a Position parameter and empty value to the uicontrol command from step 1

in your UI code file, as follows:

btn1 = uicontrol('Style','pushbutton',...

'String','Push Me','Position',[])

With the cursor inside the brackets [], type Ctrl+V to paste the setpos output as

the Position parameter value:

btn1 = uicontrol('Style','pushbutton',...

'String','Push Me','Position',[37 362 127 27])

You cannot call setpos when you are creating a component because setpos requires the

handle of the component as an argument. However, you can create a small function that

lets you position a component interactively as you create it. The function waits for you

to press the mouse button, then calls rbbox, and returns a position rectangle when you

release the mouse button:

function rect = getrect

disp('=== Click and drag out a Position rectangle.')

waitforbuttonpress % So that rbbox does not return immediately

rect = rbbox; % User drags out a rectangle, releases button

clipboard('copy', rect) % Place set string on system

% clipboard as well as returning it

To use getrect:

In the editor, place the following statement in your UI code file to generate a push

button. Specify getrect within it as the value for the Position property:

btn1 = uicontrol('Style','pushbutton','String','Push Me',...

'Position',getrect);

Select the entire statement in the editor and execute it with the F9 key or by right-

clicking and selecting Evaluate Selection.

In the figure window, drag out a rectangle for the control to occupy. When you

have finished dragging, the new component displays in that rectangle. (If you type

a character while you are dragging, rbbox aborts, you receive an error, and no

uicontrol is created.)

In the editor, select getrect in the uicontrol statement, and type [] in place of it.

The statement now looks like this:

1 2 ... 377 378 379 380 381 382 383 384 385 386 387 ... 499 500

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