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Java Forum / GUI / February 2006gridbaglayout & jcomboboxes
Hi, I've the following components in a 6x6 gridbaglayout using java 1.4 and windows L&F on win2k: jlabel jcombo jlabel jcombo jlabel jcombo jlabel jcombo jlabel jtextfield jlabel jcombo jlabel jcombo jlabel jtextfield jlabel jcombo jlabel jcombo jlabel jcombo jlabel jcombo jlabel jcombo jlabel jcombo jlabel jcombo jlabel jtextarea jlabel jtextarea jlabel jtextarea I've used jcombo.setUI(BasicComboBoxUI) on each of the combos so the down arrow key opens the popup if it's closed and traverses it if opened. The components in row 0 and row 5 are painted smaller in height than the other rows. Is there a way to fix this? or, alternatively, a handy way to use the default ComboBoxUI (whatever that is) but get the arrow down key behaviour I want? (it was just stepping through the entries before but wasn't causing the popup, F4 was activating the popup) Also, selecting an item in the top left combobox changes the items available in all the others. When I do this all the boxes are repainted different sizes i.e. the columns all shift slightly even though all the items are much shorter than the displayed length of the comboboxes. Is there a way to stop this? Cheers, Richard. >jlabel jcombo jlabel jcombo jlabel jcombo Normally you would make this into a custom Jpanel. Then you can repeat it as needed. You problem then is making it align with the last line . I had a problem like this back in the Java 1.0 days. My rather ugly solution was to invent a component that added its members individually to the surrounding GridBagLayout.  SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. >Also, selecting an item in the top left combobox changes the items available >in all the others. When I do this all the boxes are repainted different >sizes i.e. the columns all shift slightly even though all the items are much >shorter than the displayed length of the comboboxes. Is there a way to stop >this? You can use setPreferredSize to pick a standard size. You can use the GridBagLayout fill features to make each component grow horizontally to fill its cell. You can fool with GridBagLayout insets to boost the minimum size. You can write your own layout manager where you set column widths or allocate them proportionately. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. > Hi, I've the following components in a 6x6 gridbaglayout using java 1.4 and > windows L&F on win2k: [quoted text clipped - 22 lines] > > Cheers, Richard. If it should look like a table with the same column width - use GridLayout otherwise you may try SpringLayout > Hi, I've the following components in a 6x6 gridbaglayout using java 1.4 > and windows L&F on win2k: [quoted text clipped - 22 lines] > > Cheers, Richard. Cheers for the suggestions Guys, I solved the "columns all repainting slightly different sizes when contents are changed" problem by letting it use the default UI (turned out to be windowsUI) for the comboboxes, I just extended the combobox to and overode the processKey method to get the "arrow key causes popup" behaviour I wanted. So, the remaining problem is the boxes in row 1 and row 5 being slightly smaller in height. I'll try putting each row in a panel or the gridlayout as you suggest. Any other ideas are welcome. (I've tried setting preferred sizes and using fill.BOTH for all the boxes but it doesn't seem to solve this problem). >>Hi, I've the following components in a 6x6 gridbaglayout using java 1.4 >>and windows L&F on win2k: [quoted text clipped - 36 lines] > sizes and using fill.BOTH for all the boxes but it doesn't seem to solve > this problem). Try setting weighty as this can sometimes help. >>>Hi, I've the following components in a 6x6 gridbaglayout using java 1.4 >>>and windows L&F on win2k: [quoted text clipped - 38 lines] >> > Try setting weighty as this can sometimes help. Thanks Ian, I did try that and managed to get everthing the same size on initial setup but then it all goes a bit weird when the JInternalFrame is resized. Could be worth playing with it a bit more though. Cheers, Richard. > Hi, I've the following components in a 6x6 gridbaglayout using java 1.4 and > windows L&F on win2k: [quoted text clipped - 3 lines] > The components in row 0 and row 5 are painted smaller in height than the > other rows. Is there a way to fix this? or, alternatively, a handy way to I provide a Windows L&f that addresses a similar issue: you want to align along the font baseline and want to use consistent bounds - both at the same time. Besides that the correct font shall be used consitently for all dialog components. And typically you want all this in Java 1.4, Java 5, Java 6, with Windows 95 up to Vista. The Windows Layout Specifications and Guidelines recommend to make all components that are arranged in a row 14 Dialog Units tall. That's what I aim to do with the JGoodies Windows L&f. This project is open source; the library, tutorial, docs, and a demo are available at no charge. You may want to test drive the "Looks Demo" to check the differences between the Sun Windows L&f, the Winlaf L&f and the JGoodies Windows L&f, here it is: http://www.jgoodies.com/downloads/index.html The project home is here: https://looks.dev.java.net/ Since Java 6 a couple of layout managers can set components bounds such that the fonts are aligned along the font baseline. But this may lead to inconsistent component bounds if the bounds and font baselines are inconsitent or arbitrary. Hope this helps. -Karsten Lentzsch On Sat, 04 Feb 2006 20:36:12 +0100, Karsten Lentzsch <karsten@jgoodies.com> wrote, quoted or indirectly quoted someone who said : >http://www.jgoodies.com/downloads/index.html I ran your looks demo under Java Web Start. The most obvious difference is that in your JGoodies L&F you add a little white space to the left of the text in a box rather than cramming it against the left hand end. I think that is the most important thing in improving the appearance. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. > [...] The most obvious > difference is that in your JGoodies L&F you add a little white space > to the left of the text in a box rather than cramming it against the > left hand end. I think that is the most important thing in improving > the appearance. First off, I provide four L&fs: the JGoodies Windows L&f, Plastic, Plastic3D, and PlasticXP. The differences vary with the Java version (1.4 vs. 1.5 vs. 1.6), OS or OS edition (Linux, Windows 95/98/.../XP/Vista), and desktop settings (font, font size, software screen resolution etc.) For example on Windows Vista the most obvious difference is that the JGoodies Windows L&f uses Vista's Segoe UI font, where other Windows L&f use the then outdated Tahoma or even MS Sans Serif. If you are on Windows and choose "Large Fonts" or increase the software resolution to 120dpi, the most obvious difference may be the font size and the corrected font baseline positions. Anyway, I should add that I tried and try to move these improvements and changes to the core. And it seems that these change can be moved to the Java 7 core L&fs. -Karsten Thanks Karsten, I'll try this out. >> Hi, I've the following components in a 6x6 gridbaglayout using java 1.4 >> and windows L&F on win2k: [quoted text clipped - 31 lines] > Hope this helps. > -Karsten Lentzsch Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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