Java provides several techniques for programmatic bulk image resize, including the getScaledInstance() method and the Graphics2D class. If a resize operation changes the aspect ratio of an image, it will result in “squeezing” the image out of its current proportions. Resizing an image means removing pixels and reducing its physical size, or “blowing up” the image by adding pixels, which will reduce image quality.

Today it is widely used for mobile development, as the programming language for Android smartphone applications, and is commonly used for edge devices and internet of things (IoT) development. tPreferredSize( is a popular object-oriented programming language originally designed and used for distributed enterprise applications. Uicontrol(tab2, 'String', 'Close', 'Callback', 'close(gcbf)') Tab2 = uitab(hTabGroup, 'title', 'Panel 2') Tab1 = uitab(hTabGroup, 'title', 'Panel 1') setTabComponentAt ( 1,jPanel ) % Tab #1 = second tab % Attach this tab panel as the tab-group's 2nd component % Prepare a tab panel with our label and close button

% Prepare the close button: icon, size and callback Set(jCloseButton, if this is obvious, I’m new to MATLAB.Ī = axes ( 'parent',tab1 ) surf ( peaks ) You wrote that icons are automatically greyed out, but I can’t get it to work. If I comment the paragraph titled with “% Add an icon to tab #1”, the tab is greyed out properly (without icon). tEnabledAt(1,false) % disable only tab #1 % Note: both label & icon automatically grayed when disabled tTabComponentAt(1,jLabel) % Tab #1 = second tab JTabGroup = getappdata(handle(hTabGroup),'JTabbedPane') setEnabledAt ( 1,false ) % disable only tab #1 setTabComponentAt ( 1,jLabel ) % Tab #1 = second tab % Note: both label & icon automatically grayed when disabled However, the Java-based customizations shown in this article are still unsupported and undocumented, although they remain practically unchanged from what I’ve described in this article, four years earlier. Any particular customization you are interested in? Please do post a comment.Īddendum Oct 3 2014: the uitab and uitabgroup functions have finally become fully supported and documented in Matlab version 8.4 (R2014b). Next week’s article will conclude the series on Matlab’s uitab. tTabComponentAt(1,jPanel) % Tab #1 = second tab Set(jPanel.getLayout, 'Hgap',0, 'Vgap',0) % default gap = 5px Set(jCloseButton, Now let's prepare a tab panel with our label and close button JCloseButton = handle(,'CallbackProperties') JarFile = fullfile(matlabroot,'/java/jar/mwt.jar') % Now attach this tab panel as the tab-group's 2nd component getLayout, 'Hgap', 0, 'Vgap', 0 ) % default gap = 5px JPanel % default layout = FlowLayout set (jPanel. % Now let's prepare a tab panel with our label and close button Set (jCloseButton, (h,e ) delete (tab2 ) ) % Now let's prepare the close button: icon, size and callback IconsFolder = '/com/mathworks/mwt/resources/' JarFile = fullfile ( matlabroot, '/java/jar/mwt.jar' ) The solution is to set our own custom control as the requested tab, and add our icon (or other customizations) to it.

Unfortunately, for some reason that I do not fully understand, jTabGroup. Icons and sub-components can be added to the tabs. Which leads us to our next customization: Icon images Similarly, we can also set a background gradient image for the tabs, using the CSS background-image directive. We can set the foreground text color using the CSS color directive. Uitabgroup with non-default forground and background tab colors and fonts % Equivalent manners to set a yellow tab background: Also remember that Java uses 0-based indexing so tab #1 is actually the second tab: Note that setForegroundAt() overrides anything set by setForeground(). We can set the tab font color using setForeground() and setForegroundAt(), or via HTML. JTabGroup = getappdata(handle(hTabGroup),'JTabbedPane') Foreground & background tab colors Uicontrol(tab2, 'String','Close', 'Callback','close(gcbf)') Tab2 = uitab(hTabGroup, 'title','Panel 2') Tab1 = uitab(hTabGroup, 'title','Panel 1') JTabGroup = getappdata (handle (hTabGroup ), 'JTabbedPane' ) % Get the underlying Java reference (use hidden property) Uicontrol (tab2, 'String', 'Close', 'Callback', 'close(gcbf)' ) Tab2 = uitab (hTabGroup, 'title', 'Panel 2' ) Tab1 = uitab (hTabGroup, 'title', 'Panel 1' ) Ī = axes ( 'parent', tab1 ) surf ( peaks ) % Prepare a tab-group consisting of two tabs % Prevent an annoying warning msg warning off MATLAB:uitabgroup:OldVersion

Java jlabel icon resize