GridBagLayout Problem

**peschmae** · 12-11-2004, 09:56

VE: Hab ihn noch nicht "ernsthaft" benutzt, machte aber einen guten Eindruck. Allerdings sehr lahm.

Zitat von McSnoop

des weiteren sollten die Proggies die mit dem Editor erstellt werden auch unter Windows , Linux und Solaris laufen, sprich keine Bindung vorhanden sein an Java 5 oder anderen versionen. Sprich es sollte einem selbst überlassen sein von welcher verseion man das proggie abhängig macht.

Die Gui-Builder erstellen dir Code - Swing-Code. Den kompilierst du und das ist dann ein normales Programm. Das "nur Windows" oder so bezieht sich meist auf den GUI-Builder selber und nicht auf die damit erstellten Guis.

Was aber eventuell irgendwo ein kleiner Stolperstein werden könnte ist die Abwärtskompatibilität zu älteren JVMs. D.h. wenn du Programme entwickelst die unbedingt auch unter Java 2 1.3 laufen sollen musst du schon etwas aufpassen (nicht so sehr bei GUIs aber andernorts, manche Klassen (wie z.B. XML-Verarbeitung glaube ich) gibts in Java erst ab Java 2 1.4)

MfG Peschmä

**herzberg** · 13-11-2004, 13:34

Hi
Wenn du dies einfügst, sollte es auf allen Maschinen laufen

JPanel pnPanel0;
JLabel lbLabel0;
JLabel lbLabel1;
JLabel lbLabel2;
JList lsList0;
JList lsList1;
JList lsList2;
JLabel lbLabel3;
JLabel lbLabel4;
JLabel lbLabel5;
JTextField tfText0;
JTextField tfText1;
JTextField tfText2;
JList lsList3;
JButton btBut0;
JButton btBut1;
JButton btBut2;
JButton btBut3;

pnPanel0 = new JPanel();
GridBagLayout gbPanel0 = new GridBagLayout();
GridBagConstraints gbcPanel0 = new GridBagConstraints();
pnPanel0.setLayout( gbPanel0 );

lbLabel0 = new JLabel( "Label 1" );
gbcPanel0.gridx = 0;
gbcPanel0.gridy = 0;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 1;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( lbLabel0, gbcPanel0 );
pnPanel0.add( lbLabel0 );

lbLabel1 = new JLabel( "Label 2" );
gbcPanel0.gridx = 2;
gbcPanel0.gridy = 0;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 1;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( lbLabel1, gbcPanel0 );
pnPanel0.add( lbLabel1 );

lbLabel2 = new JLabel( "Label 3" );
gbcPanel0.gridx = 4;
gbcPanel0.gridy = 0;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 1;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( lbLabel2, gbcPanel0 );
pnPanel0.add( lbLabel2 );

String []dataList0 = { "Chocolate", "Ice Cream", "Apple Pie" };
lsList0 = new JList( dataList0 );
gbcPanel0.gridx = 0;
gbcPanel0.gridy = 1;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 1;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( lsList0, gbcPanel0 );
pnPanel0.add( lsList0 );

String []dataList1 = { "Chocolate", "Ice Cream", "Apple Pie" };
lsList1 = new JList( dataList1 );
gbcPanel0.gridx = 2;
gbcPanel0.gridy = 1;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 1;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( lsList1, gbcPanel0 );
pnPanel0.add( lsList1 );

String []dataList2 = { "Chocolate", "Ice Cream", "Apple Pie" };
lsList2 = new JList( dataList2 );
gbcPanel0.gridx = 4;
gbcPanel0.gridy = 1;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 1;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( lsList2, gbcPanel0 );
pnPanel0.add( lsList2 );

lbLabel3 = new JLabel( "Label 4" );
gbcPanel0.gridx = 0;
gbcPanel0.gridy = 2;
gbcPanel0.gridwidth = 1;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 1;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( lbLabel3, gbcPanel0 );
pnPanel0.add( lbLabel3 );

lbLabel4 = new JLabel( "Label 5" );
gbcPanel0.gridx = 2;
gbcPanel0.gridy = 2;
gbcPanel0.gridwidth = 1;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 1;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( lbLabel4, gbcPanel0 );
pnPanel0.add( lbLabel4 );

lbLabel5 = new JLabel( "Label 6" );
gbcPanel0.gridx = 4;
gbcPanel0.gridy = 2;
gbcPanel0.gridwidth = 1;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 1;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( lbLabel5, gbcPanel0 );
pnPanel0.add( lbLabel5 );

tfText0 = new JTextField( );
gbcPanel0.gridx = 1;
gbcPanel0.gridy = 2;
gbcPanel0.gridwidth = 1;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 0;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( tfText0, gbcPanel0 );
pnPanel0.add( tfText0 );

tfText1 = new JTextField( );
gbcPanel0.gridx = 3;
gbcPanel0.gridy = 2;
gbcPanel0.gridwidth = 1;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 0;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( tfText1, gbcPanel0 );
pnPanel0.add( tfText1 );

tfText2 = new JTextField( );
gbcPanel0.gridx = 5;
gbcPanel0.gridy = 2;
gbcPanel0.gridwidth = 1;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 0;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( tfText2, gbcPanel0 );
pnPanel0.add( tfText2 );

String []dataList3 = { "Chocolate", "Ice Cream", "Apple Pie" };
lsList3 = new JList( dataList3 );
gbcPanel0.gridx = 0;
gbcPanel0.gridy = 3;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 2;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 1;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( lsList3, gbcPanel0 );
pnPanel0.add( lsList3 );

btBut0 = new JButton( "Button 1" );
gbcPanel0.gridx = 2;
gbcPanel0.gridy = 3;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 0;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( btBut0, gbcPanel0 );
pnPanel0.add( btBut0 );

btBut1 = new JButton( "Button 3" );
gbcPanel0.gridx = 2;
gbcPanel0.gridy = 4;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 0;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( btBut1, gbcPanel0 );
pnPanel0.add( btBut1 );

btBut2 = new JButton( "Button 2" );
gbcPanel0.gridx = 4;
gbcPanel0.gridy = 3;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 0;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( btBut2, gbcPanel0 );
pnPanel0.add( btBut2 );

btBut3 = new JButton( "Button 4" );
gbcPanel0.gridx = 4;
gbcPanel0.gridy = 4;
gbcPanel0.gridwidth = 2;
gbcPanel0.gridheight = 1;
gbcPanel0.fill = GridBagConstraints.BOTH;
gbcPanel0.weightx = 1;
gbcPanel0.weighty = 0;
gbcPanel0.anchor = GridBagConstraints.NORTH;
gbPanel0.setConstraints( btBut3, gbcPanel0 );
pnPanel0.add( btBut3 );

**McSnoop** · 15-11-2004, 08:27

erst mal thx für deine Antwort. Wenn ich das Einfüge und das ganze in ein JFrame packe bleibt es leer.

ich habe hier noch ein Beispiel aber versteh noch nicht warum das funktioniert bzw warum das so gestrickt ist.

Code:

......

public LookandFeel(){
  super("look and Feel");
  setSize(400,200);
  addWindowListener(new CloseAdapter());   <----- das wird gebraucht um das Frame zu beenden

  JPanel pa = new JPanel();
  JPanel pb = new JPanel();

  getContentPane().setLayout(new BorderLayout());<----- warum wird hier
  getContentPane().add(BorderLayout.CENTER,pa);<-----  getContentPane
  getContentPane().add(BorderLayout.SOUTH,pb);<------ verwendet???
  
  pa.setLayout(new GridLayout(2,1,10,10));

  ....... einfügen der komponenten wie buttons usw.

}
......

mfg
Snoop

**herzberg** · 15-11-2004, 13:07

Im Gegensatz zu AWT ist Swing etwas anders aufgebaut. Daher desteht das JFrame aus mehreren Layern. getContentPane() wird benötigt um vom JFrame den zum setzen von Layouts etc. wichigen Layer zu erhalten. Dieser ist ContentPane.

Zum Layout: Wenn du die Attribute in der Klasse definierst und das setzen im Konstruktor funktioniert das einwandfrei!

Ciao

**herzberg** · 15-11-2004, 13:22

Das ist mir schon klar, dass das bei dir nicht funktioniert. Du erzeugst zwar alles nötige, fügst es aber nie ein. Ich habe dir das mal erweitert.

Code:

public class MyFrame extends JFrame{
	JPanel pnPanel0;
	JLabel lbLabel0;
	JLabel lbLabel1;
	JLabel lbLabel2;
	JList lsList0;
	JList lsList1;
	JList lsList2;
	JLabel lbLabel3;
	JLabel lbLabel4;
	JLabel lbLabel5;
	JTextField tfText0;
	JTextField tfText1;
	JTextField tfText2;
	JList lsList3;
	JButton btBut0;
	JButton btBut1;
	JButton btBut2;
	JButton btBut3;

	MyFrame(){
		super("MY PROGRAM");
		getContentPane().setLayout(new BorderLayout());

		pnPanel0 = new JPanel();
		GridBagLayout gbPanel0 = new GridBagLayout();
		GridBagConstraints gbcPanel0 = new GridBagConstraints();
		pnPanel0.setLayout( gbPanel0 );

		lbLabel0 = new JLabel( "Label 1"  );
		gbcPanel0.gridx = 0;
		gbcPanel0.gridy = 0;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 1;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( lbLabel0, gbcPanel0 );
		pnPanel0.add( lbLabel0 );
		
		lbLabel1 = new JLabel( "Label 2"  );
		gbcPanel0.gridx = 2;
		gbcPanel0.gridy = 0;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 1;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( lbLabel1, gbcPanel0 );
		pnPanel0.add( lbLabel1 );
		
		lbLabel2 = new JLabel( "Label 3"  );
		gbcPanel0.gridx = 4;
		gbcPanel0.gridy = 0;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 1;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( lbLabel2, gbcPanel0 );
		pnPanel0.add( lbLabel2 );
		
		String []dataList0 = { "Chocolate", "Ice Cream", "Apple Pie" };
		lsList0 = new JList( dataList0 );
		gbcPanel0.gridx = 0;
		gbcPanel0.gridy = 1;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 1;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( lsList0, gbcPanel0 );
		pnPanel0.add( lsList0 );
	
		String []dataList1 = { "Chocolate", "Ice Cream", "Apple Pie" };
		lsList1 = new JList( dataList1 );
		gbcPanel0.gridx = 2;
		gbcPanel0.gridy = 1;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 1;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( lsList1, gbcPanel0 );
		pnPanel0.add( lsList1 );
	
		String []dataList2 = { "Chocolate", "Ice Cream", "Apple Pie" };
		lsList2 = new JList( dataList2 );
		gbcPanel0.gridx = 4;
		gbcPanel0.gridy = 1;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 1;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( lsList2, gbcPanel0 );
		pnPanel0.add( lsList2 );
	
		lbLabel3 = new JLabel( "Label 4"  );
		gbcPanel0.gridx = 0;
		gbcPanel0.gridy = 2;
		gbcPanel0.gridwidth = 1;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 1;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( lbLabel3, gbcPanel0 );
		pnPanel0.add( lbLabel3 );
	
		lbLabel4 = new JLabel( "Label 5"  );
		gbcPanel0.gridx = 2;
		gbcPanel0.gridy = 2;
		gbcPanel0.gridwidth = 1;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 1;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( lbLabel4, gbcPanel0 );
		pnPanel0.add( lbLabel4 );
		
		lbLabel5 = new JLabel( "Label 6"  );
		gbcPanel0.gridx = 4;
		gbcPanel0.gridy = 2;
		gbcPanel0.gridwidth = 1;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 1;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( lbLabel5, gbcPanel0 );
		pnPanel0.add( lbLabel5 );
		
		tfText0 = new JTextField( );
		gbcPanel0.gridx = 1;
		gbcPanel0.gridy = 2;
		gbcPanel0.gridwidth = 1;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 0;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( tfText0, gbcPanel0 );
		pnPanel0.add( tfText0 );
	
		tfText1 = new JTextField( );
		gbcPanel0.gridx = 3;
		gbcPanel0.gridy = 2;
		gbcPanel0.gridwidth = 1;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 0;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( tfText1, gbcPanel0 );
		pnPanel0.add( tfText1 );
		
		tfText2 = new JTextField( );
		gbcPanel0.gridx = 5;
		gbcPanel0.gridy = 2;
		gbcPanel0.gridwidth = 1;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 0;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( tfText2, gbcPanel0 );
		pnPanel0.add( tfText2 );
		
		String []dataList3 = { "Chocolate", "Ice Cream", "Apple Pie" };
		lsList3 = new JList( dataList3 );
		gbcPanel0.gridx = 0;
		gbcPanel0.gridy = 3;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 2;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 1;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( lsList3, gbcPanel0 );
		pnPanel0.add( lsList3 );
		
		btBut0 = new JButton( "Button 1"  );
		gbcPanel0.gridx = 2;
		gbcPanel0.gridy = 3;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 0;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( btBut0, gbcPanel0 );
		pnPanel0.add( btBut0 );
	
		btBut1 = new JButton( "Button 3"  );
		gbcPanel0.gridx = 2;
		gbcPanel0.gridy = 4;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 0;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( btBut1, gbcPanel0 );
		pnPanel0.add( btBut1 );
	
		btBut2 = new JButton( "Button 2"  );
		gbcPanel0.gridx = 4;
		gbcPanel0.gridy = 3;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 0;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( btBut2, gbcPanel0 );
		pnPanel0.add( btBut2 );
	
		btBut3 = new JButton( "Button 4"  );
		gbcPanel0.gridx = 4;
		gbcPanel0.gridy = 4;
		gbcPanel0.gridwidth = 2;
		gbcPanel0.gridheight = 1;
		gbcPanel0.fill = GridBagConstraints.BOTH;
		gbcPanel0.weightx = 1;
		gbcPanel0.weighty = 0;
		gbcPanel0.anchor = GridBagConstraints.NORTH;
		gbPanel0.setConstraints( btBut3, gbcPanel0 );
		pnPanel0.add( btBut3 );
	
		getContentPane().add(BorderLayout.CENTER,pnPanel0);
  	             setVisible(true);
	}

**McSnoop** · 15-11-2004, 13:57

Geil funzt. THX an alle.

Bezüglich des GridBagLayouts:

da es immer mehr blöcke werden je mehr komponenten man einfügt, würde es sich anbieten das ganze vielleicht in Schleifen zu packen??? so das die sourcen überschaubarer werden oder würden die schleifen das nur komplizierter machen???

mfg
Snoop

**herzberg** · 16-11-2004, 23:55

Klar kannst du das in Schleifen Packen. Dann musst du aber auch die Layoutelemente mindestens in ein Array packen um sie nacheinander anzusprechen. Die Frage ist nun, da du viele unterschiedliche Layoutelemente hast, von welchen Typ dein Array sein soll. Du kannst den Typ auf Component setzen da alle von Component geerbt haben, musst aber dann beim konkreten Zugriff wieder Casten und das kostet Zeit.

Thema: GridBagLayout Problem

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