swing - Manage Java CardLayout JPanels created with different classes -


i need simple example of how manage multiple jpanels (created different classes) in 1 jframe using cardlayout (or else?). illustrative example of need:

panel a:

enter image description here

panel b:

enter image description here

example of file structures:

// gui.java public class gui {     ...     ...     ... }  // panela.java public class panela {     ...     ...     ... () {         jpanel pnl = new jpanel();         pnl.setbackground(color.orange);         jbutton btn = new jbuttn("show panel b");         pnl.add(btn);     }      public void actionperformed(actionevent ae) {         ...     } }  // panelb.java public class panelb {     ...     ...     ... () {         jpanel pnl = new jpanel();         pnl.setbackground(color.green);         jbutton btn = new jbuttn("show panel a");         pnl.add(btn);     }      public void actionperformed(actionevent ae) {         ...     } }

i found lot of examples doing this, jpanels created in same class jbuttons fields listener access them. tried edit examples no success. sorry bad english, thank in advance!

try this:

gui.java:

public class gui {     ...     jpanel cards = ne jpanel(new cardlayout());     private void initcomponetns() {         ...         // cards container cardlayout...         cards.add(new panela(this));         cards.add(new panelb(this));         ...     } }

panela.java

public class panela extends jpanel {     ...     private final gui gui;     panela(gui gui) {         this.gui = gui;     }     ... () {         setbackground(color.orange);         jbutton btn = new jbuttn("show panel b");         add(btn);     }      public void actionperformed(actionevent ae) {         ...         gui.cards. ...     } }

panelb.java

public class panelb extends jpanel {     ...     private final gui gui;     panelb(gui gui) {         this.gui = gui;     }     ...     ... () {         setbackground(color.green);         jbutton btn = new jbuttn("show panel a");         add(btn);     }      public void actionperformed(actionevent ae) {         ...         gui.cards. ...     } }

edited...


Comments

Post a Comment

Popular posts from this blog

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m
Read more

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

sql server - Why does Linq-to-SQL add unnecessary COUNT()? -

here tables: create table customer ( cid int primary key, name varchar(32) ) create table ord ( oid int primary key, cid int foreign key references customer, address varchar(20) ) here's linq-to-sql statement: var aaa = c in db.customer select new { c, o = c.ord.tolist() }; and here's inexplicable query generated linq-to-sql: select [t0].[cid] [cid], [t0].[name] [name], [t1].[oid] [oid], [t1].[cid] [cid2], [t1].[address] [address], (select count(*) [dbo].[ord] [t2] [t2].[cid] = [t0].[cid]) [value] [dbo].[customer] [t0] left outer join [dbo].[ord] [t1] on [t1].[cid] = [t0].[cid] order [t0].[cid], [t1].[oid] i want understand how rid of count(*) part. it's entirely uncalled for! linq needs count(*) in order determine number of entries returned o = c.ord.tolist() .
Read more