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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/layout-example.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
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| -rw-r--r-- | doc/html/layout-example.html | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/doc/html/layout-example.html b/doc/html/layout-example.html new file mode 100644 index 0000000..8f8bf95 --- /dev/null +++ b/doc/html/layout-example.html @@ -0,0 +1,211 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/layout/layout.doc:4 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>Layout Managers</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Layout Managers</h1> + + +<p> +This example shows simple and intermediate use of Qt's layout +classes, <a href="qgridlayout.html">QGridLayout</a>, <a href="qboxlayout.html">QBoxLayout</a> etc. +<p> <hr> +<p> Implementation: +<p> <pre>/**************************************************************************** +** $Id: qt/layout.cpp 3.3.8 edited Jan 11 14:37 $ +** +** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved. +** +** This file is part of an example program for Qt. This example +** program may be used, distributed and modified without limitation. +** +*****************************************************************************/ + +#include <<a href="qapplication-h.html">qapplication.h</a>> +#include <<a href="qlabel-h.html">qlabel.h</a>> +#include <<a href="qcolor-h.html">qcolor.h</a>> +#include <<a href="qpushbutton-h.html">qpushbutton.h</a>> +#include <<a href="qlayout-h.html">qlayout.h</a>> +#include <<a href="qlineedit-h.html">qlineedit.h</a>> +#include <<a href="qmultilineedit-h.html">qmultilineedit.h</a>> +#include <<a href="qmenubar-h.html">qmenubar.h</a>> +#include <<a href="qpopupmenu-h.html">qpopupmenu.h</a>> + +class ExampleWidget : public <a href="qwidget.html">QWidget</a> +{ +public: + ExampleWidget( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0 ); + ~ExampleWidget(); +}; + +<a name="f260"></a>ExampleWidget::ExampleWidget( <a href="qwidget.html">QWidget</a> *parent, const char *name ) + : <a href="qwidget.html">QWidget</a>( parent, name ) +{ + // Make the top-level layout; a vertical box to contain all widgets + // and sub-layouts. + <a href="qboxlayout.html">QBoxLayout</a> *topLayout = new <a href="qvboxlayout.html">QVBoxLayout</a>( this, 5 ); + + // Create a menubar... + <a href="qmenubar.html">QMenuBar</a> *menubar = new <a href="qmenubar.html">QMenuBar</a>( this ); +<a name="x540"></a> menubar-><a href="qmenubar.html#setSeparator">setSeparator</a>( QMenuBar::InWindowsStyle ); + <a href="qpopupmenu.html">QPopupMenu</a>* popup; + popup = new <a href="qpopupmenu.html">QPopupMenu</a>( this ); + popup-><a href="qmenudata.html#insertItem">insertItem</a>( "&Quit", qApp, SLOT(<a href="qapplication.html#quit">quit</a>()) ); + menubar-><a href="qmenudata.html#insertItem">insertItem</a>( "&File", popup ); + + // ...and tell the layout about it. +<a name="x539"></a> topLayout-><a href="qlayout.html#setMenuBar">setMenuBar</a>( menubar ); + + // Make an hbox that will hold a row of buttons. + <a href="qboxlayout.html">QBoxLayout</a> *buttons = new <a href="qhboxlayout.html">QHBoxLayout</a>( topLayout ); + int i; + for ( i = 1; i <= 4; i++ ) { + <a href="qpushbutton.html">QPushButton</a>* but = new <a href="qpushbutton.html">QPushButton</a>( this ); + <a href="qstring.html">QString</a> s; +<a name="x542"></a> s.<a href="qstring.html#sprintf">sprintf</a>( "Button %d", i ); +<a name="x530"></a> but-><a href="qbutton.html#setText">setText</a>( s ); + + // Set horizontal <a href="layout.html#stretch-factor">stretch factor</a> to 10 to let the buttons + // stretch horizontally. The buttons will not stretch + // vertically, since bigWidget below will take up vertical + // stretch. +<a name="x529"></a> buttons-><a href="qboxlayout.html#addWidget">addWidget</a>( 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. + <a href="qboxlayout.html">QBoxLayout</a> *buttons2 = new <a href="qhboxlayout.html">QHBoxLayout</a>( topLayout ); + + <a href="qpushbutton.html">QPushButton</a>* but = new <a href="qpushbutton.html">QPushButton</a>( "Button five", this ); + buttons2-><a href="qboxlayout.html#addWidget">addWidget</a>( but ); + + but = new <a href="qpushbutton.html">QPushButton</a>( "Button 6", this ); + buttons2-><a href="qboxlayout.html#addWidget">addWidget</a>( 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. +<a name="x528"></a> buttons2-><a href="qboxlayout.html#addStretch">addStretch</a>( 10 ); + + // Make a big widget that will grab all space in the middle. + <a href="qmultilineedit.html">QMultiLineEdit</a> *bigWidget = new <a href="qmultilineedit.html">QMultiLineEdit</a>( this ); + bigWidget-><a href="qtextedit.html#setText">setText</a>( "This widget will get all the remaining space" ); +<a name="x531"></a> bigWidget-><a href="qframe.html#setFrameStyle">setFrameStyle</a>( 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-><a href="qboxlayout.html#addWidget">addWidget</a>( bigWidget, 10 ); + topLayout-><a href="qboxlayout.html#addWidget">addWidget</a>( 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. + const int numRows = 3; + const int labelCol = 0; + const int linedCol = 1; + const int multiCol = 2; + + // Let the grid-layout have a spacing of 10 pixels between + // widgets, overriding the default from topLayout. + <a href="qgridlayout.html">QGridLayout</a> *grid = new <a href="qgridlayout.html">QGridLayout</a>( topLayout, 0, 0, 10 ); + int row; + + for ( row = 0; row < numRows; row++ ) { + <a href="qlineedit.html">QLineEdit</a> *ed = new <a href="qlineedit.html">QLineEdit</a>( this ); + // The line edit goes in the second column +<a name="x533"></a> grid-><a href="qgridlayout.html#addWidget">addWidget</a>( ed, row, linedCol ); + + // Make a label that is a buddy of the line edit + <a href="qstring.html">QString</a> s; + s.<a href="qstring.html#sprintf">sprintf</a>( "Line &%d", row+1 ); + <a href="qlabel.html">QLabel</a> *label = new <a href="qlabel.html">QLabel</a>( ed, s, this ); + // The label goes in the first column. + grid-><a href="qgridlayout.html#addWidget">addWidget</a>( label, row, labelCol ); + } + + // The multiline edit will cover the entire vertical range of the + // grid (rows 0 to numRows) and stay in column 2. + + <a href="qmultilineedit.html">QMultiLineEdit</a> *med = new <a href="qmultilineedit.html">QMultiLineEdit</a>( this ); +<a name="x532"></a> grid-><a href="qgridlayout.html#addMultiCellWidget">addMultiCellWidget</a>( 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. +<a name="x534"></a> grid-><a href="qgridlayout.html#setColStretch">setColStretch</a>( linedCol, 10 ); + grid-><a href="qgridlayout.html#setColStretch">setColStretch</a>( multiCol, 20 ); + + // Add a widget at the bottom. + <a href="qlabel.html">QLabel</a>* sb = new <a href="qlabel.html">QLabel</a>( this ); + sb-><a href="qlabel.html#setText">setText</a>( "Let's pretend this is a status bar" ); + sb-><a href="qframe.html#setFrameStyle">setFrameStyle</a>( 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... +<a name="x545"></a><a name="x537"></a> sb-><a href="qwidget.html#setFixedHeight">setFixedHeight</a>( sb-><a href="qwidget.html#sizeHint">sizeHint</a>().height() ); + +<a name="x535"></a> sb-><a href="qlabel.html#setAlignment">setAlignment</a>( AlignVCenter | AlignLeft ); + topLayout-><a href="qboxlayout.html#addWidget">addWidget</a>( sb ); + +<a name="x538"></a> topLayout-><a href="qlayout.html#activate">activate</a>(); +} + +ExampleWidget::~ExampleWidget() +{ + // All child widgets are deleted by Qt. + // The top-level layout and all its sub-layouts are deleted by Qt. +} + +int main( int argc, char **argv ) +{ + <a href="qapplication.html">QApplication</a> a( argc, argv ); + + ExampleWidget f; + a.<a href="qapplication.html#setMainWidget">setMainWidget</a>(&f); + f.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Layouts"); + f.<a href="qwidget.html#show">show</a>(); + + return a.<a href="qapplication.html#exec">exec</a>(); +} +</pre> + +<p>See also <a href="examples.html">Examples</a>. + +<!-- eof --> +<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>Qt 3.3.8</div> +</table></div></address></body> +</html> |