15. februar 2000 - 12:17Der er
4 kommentarer og 1 løsning
CardLayout
I need to be able to read which card in my cardlayout I am currently viewing. I have put my card contense inside two panels that have been added to the cardlayout they have in turn been added to an array (two cards total), this works fine. It is in another class(a frame) that I view the cards and switch between them, this also works fine. From a menu I call a method and this is were the problem is. The method has to, based upon which card is currently being viewed, clear all the textfields in the card. My problem is that I can't figure out how to tell which card I'm viewing, calling the first and last methods doesn't work. I need to specificaly check which card is being viewed. How do I do this ?
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Eeeks...there is no available method built into the cardlayout class that does what you want. You can either try to deduct the information from the toString method, if possible, or you can make your own extension of CardLayout.
Something like the following should work:
class MyCardLayout extends CardLayout {
public String getCurrentCard() {
int ncomponents = parent.getComponentCount(); for (int i = 0 ; i < ncomponents ; i++) { Component comp = parent.getComponent(i); if (comp.visible) { return comp.name; } } return null; } }
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