![matlab 2009 video reader matlab 2009 video reader](https://demo.vdocument.in/img/378x509/reader022/reader/2020062716/5edc4936ad6a402d6666e429/r-2.jpg)
Matlab 2009 video reader free#
Therefore, feel free to use these Java containers as long as their contained GUI is limited to Java components (JButton, JComboBox etc.). Matlab objects such as axes (for plots or images) and uicontrols cannot be added since they do not have a Container wrapper. Set(hButton,'visible','off') %note: on/off, not true/false as in adding Java components which are container classes (descendants of ), it is important to remember that only other Java components can be added to these containers. Set(hButton,'units','norm', 'position',) Set (hButton, 'visible', 'off' ) %note: on/off, not true/false as in Java set (hButton, 'ResizeFcn', } ) Set (hButton, 'units', 'norm', 'position', )
![matlab 2009 video reader matlab 2009 video reader](https://ars.els-cdn.com/content/image/1-s2.0-S2213597920300082-gr1.jpg)
Once the component has been created, even before it has been placed onscreen, it can be manipulated just like any other Java object. I thank the reader who pointed this out to me. Addendum Aug 6 2010: I made an incorrect statement in the original post here regarding uipanels, which has now been removed. Unfortunately, frames are not uicontainers and therefore cannot be used as javacomponent parents. Javacomponent accepts parent handles that are figures, toolbars, uipanels or uicontainers. For this reason, the JScrollBar is created using the built-in javaObjectEDT function, which exists since R2008a and became documented/supported in R2009a. The reasons for this were outlined in the recent Matlab-EDT article. Note that Java GUI object should always use the EDT (Event Dispatch Thread). tOrientation(jScrollbar.HORIZONTAL) Įrror('Cannot create Java-based scroll-bar!') Įrror('Cannot display Java-base scroll-bar!') % Create and initialize a JScrollBar object HORIZONTAL ) Ĭatch error ( 'Cannot create Java-based scroll-bar!' ) Ĭatch error ( 'Cannot display Java-base scroll-bar!' ) % Create and initialize a JScrollBar object try This enables easier error-trapping if the Java object cannot be created or fails to initialize, before attempting to display the object: In practice, it is better to separate these two actions: create the Java object separately, and then pass the object’s reference handle to javacomponent for display. javacomponent only creates objects when a class name (string) parameter is passed to it, as a convenience service to programmers. Note the difference between Java object creation and javacomponent: A pre-created Java object only resides in JVM (Java Virtual Machine) memory, not onscreen, until javacomponent is called to display it. > javacomponent(('Click me!'),'East',hFig) javacomponent returns two handles: the Matlab HG container handle and a reference (handle) to the Java component. javacomponent then adds the requested component as a child of the requested parent container and wraps it in a Matlab Handle-Graphics (HG) container. Javacomponent accepts a component class name (a string) or a reference to a previously-created component object, an optional pixel position parameter (default=, just like uicontrol may also contain the strings ‘North’, ‘South’, ‘East’ or ‘West’), and an optional parent container handle (defaults to the current figure). It is an unsupported function originally intended only for internal Matlab use (which of course doesn’t mean we can’t use it). This means that the function is explained in a comment within the function (which can be seen via the edit(‘javacomponent’) command), but nonetheless does not have official help or doc pages. Javacomponent, available since R14 (Matlab 7.0), is yet another semi-documented built-in function. I have often used this function in past articles here, and today I would like to describe it in more detail. However, displaying Java GUI objects, as opposed to using computational (non-displayable) Java classes, requires using Matlab’s built-in javacomponent function. Matlab is highly integrated with Java, and Java classes can seamlessly be accessed from Matlab.
![matlab 2009 video reader matlab 2009 video reader](http://article.sapub.org/image/10.5923.j.computer.20190901.03_002.gif)
Sample Java components integrated in Matlab figure window (click for details)
![matlab 2009 video reader matlab 2009 video reader](https://d3i71xaburhd42.cloudfront.net/4cabb44955126c3e9bd352d2b8a2a2a936299857/3-Figure4-1.png)
In this blog I have often showed how using Java components can significantly improve Matlab GUI.