tdebindings/qtjava/javalib/examples/layout/ExampleWidget.java

/***************************************************************************
* $Id$
**
* Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
* This file is part of an example program for Qt.  This example
* program may be used, distributed and modified without limitation.
**
****************************************************************************/
import org.kde.qt.*;


class ExampleWidget  extends QWidget
{

ExampleWidget( )
{
	this(null, null);
}

ExampleWidget( QWidget parent, String name )
{
    super( parent, name );
    // Make the top-level layout; a vertical box to contain all widgets
    // and sub-layouts.
    QBoxLayout topLayout = new QVBoxLayout( this, 5 );

    // Create a menubar...
    QMenuBar menubar = new QMenuBar( this );
    menubar.setSeparator( QMenuBar.InWindowsStyle );
    QPopupMenu popup;
    popup = new QPopupMenu( this );
    popup.insertItem( "&Quit", qApp(), SLOT("quit()") );
    menubar.insertItem( "&File", popup );

    // ...and tell the layout about it.
    topLayout.setMenuBar( menubar );

    // Make an hbox that will hold a row of buttons.
    QBoxLayout buttons = new QHBoxLayout( topLayout );
    int i;
    for ( i = 1; i <= 4; i++ ) {
	QPushButton but = new QPushButton( this );
	String s = "Button " + i;
	but.setText( s );

	// Set horizontal stretch factor to 10 to let the buttons
	// stretch horizontally. The buttons will not stretch
	// vertically, since bigWidget below will take up vertical
	// stretch.
	buttons.addWidget( but, 10 );
	// (Actually, the result would have been the same with a
	// stretch factor of 0; if no items in a layout have non-zero
	// stretch, the space is divided equally between members.)
    }

    // Make another hbox that will hold a left-justified row of buttons.
    QBoxLayout buttons2 = new QHBoxLayout( topLayout );

    QPushButton but = new QPushButton( "Button five", this );
    buttons2.addWidget( but );

    but = new QPushButton( "Button 6", this );
    buttons2.addWidget( but );

    // Fill up the rest of the hbox with stretchable space, so that
    // the buttons get their minimum width and are pushed to the left.
    buttons2.addStretch( 10 );

    // Make  a big widget that will grab all space in the middle.
    QMultiLineEdit bigWidget = new QMultiLineEdit( this );
    bigWidget.setText( "This widget will get all the remaining space" );
    bigWidget.setFrameStyle( QFrame.Panel | QFrame.Plain );

    // Set vertical stretch factor to 10 to let the bigWidget stretch
    // vertically. It will stretch horizontally because there are no
    // widgets beside it to take up horizontal stretch.
    //    topLayout.addWidget( bigWidget, 10 );
    topLayout.addWidget( bigWidget ); 

    // Make a grid that will hold a vertical table of QLabel/QLineEdit
    // pairs next to a large QMultiLineEdit.

    // Don't use hard-coded row/column numbers in QGridLayout, you'll
    // regret it when you have to change the layout.
    int numRows = 3;
    int labelCol = 0;
    int linedCol = 1;
    int multiCol = 2;

    // Let the grid-layout have a spacing of 10 pixels between
    // widgets, overriding the default from topLayout.
    QGridLayout grid = new QGridLayout( topLayout, 0, 0, 10 );
    int row;

    for ( row = 0; row < numRows; row++ ) {
	QLineEdit ed = new QLineEdit( this );
	// The line edit goes in the second column
	grid.addWidget( ed, row, linedCol );	

	// Make a label that is a buddy of the line edit
	String s= "Line &" + (row+1);
	QLabel label = new QLabel( ed, s, this );
	// The label goes in the first column.
	grid.addWidget( label, row, labelCol );
    }

    // The multiline edit will cover the entire vertical range of the
    // grid (rows 0 to numRows) and stay in column 2.

    QMultiLineEdit med = new QMultiLineEdit( this );
    grid.addMultiCellWidget( med, 0, -1, multiCol, multiCol );

    // The labels will take the space they need. Let the remaining
    // horizontal space be shared so that the multiline edit gets
    // twice as much as the line edit.
    grid.setColStretch( linedCol, 10 );
    grid.setColStretch( multiCol, 20 );

    // Add a widget at the bottom.
    QLabel sb = new QLabel( this );
    sb.setText( "Let's pretend this is a status bar" );
    sb.setFrameStyle( QFrame.Panel | QFrame.Sunken );
    // This widget will use all horizontal space, and have a fixed height.

    // we should have made a subclass and implemented sizePolicy there...
    sb.setFixedHeight( sb.sizeHint().height() );

    sb.setAlignment( AlignVCenter | AlignLeft );
    topLayout.addWidget( sb );

    topLayout.activate();
}


public static void main( String[] args )
{
    QApplication a = new QApplication( args );

    ExampleWidget f = new ExampleWidget();
    a.setMainWidget(f);
    f.setCaption("Qt Example - Caption");
    f.show();

    a.exec();
	return;
}

static {
	qtjava.initialize();
}
}