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Diffstat (limited to 'examples/listboxcombo/listboxcombo.cpp')
| -rw-r--r-- | examples/listboxcombo/listboxcombo.cpp | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/examples/listboxcombo/listboxcombo.cpp b/examples/listboxcombo/listboxcombo.cpp new file mode 100644 index 0000000..4bd713a --- /dev/null +++ b/examples/listboxcombo/listboxcombo.cpp @@ -0,0 +1,187 @@ +/**************************************************************************** +** +** Copyright (C) 1992-2008 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 "listboxcombo.h" + +#include <qcombobox.h> +#include <qlistbox.h> +#include <qhbox.h> +#include <qpushbutton.h> +#include <qstring.h> +#include <qpixmap.h> +#include <qlabel.h> +#include <qimage.h> +#include <qpainter.h> +#include <qstyle.h> + + +class MyListBoxItem : public QListBoxItem +{ +public: + MyListBoxItem() + : QListBoxItem() + { + setCustomHighlighting( TRUE ); + } + +protected: + virtual void paint( QPainter * ); + virtual int width( const QListBox* ) const { return 100; } + virtual int height( const QListBox* ) const { return 16; } + +}; + +void MyListBoxItem::paint( QPainter *painter ) +{ + // evil trick: find out whether we are painted onto our listbox + bool in_list_box = listBox() && listBox()->viewport() == painter->device(); + + QRect r ( 0, 0, width( listBox() ), height( listBox() ) ); + if ( in_list_box && isSelected() ) + painter->eraseRect( r ); + painter->fillRect( 5, 5, width( listBox() ) - 10, height( listBox() ) - 10, Qt::red ); + if ( in_list_box && isCurrent() ) + listBox()->style().drawPrimitive( QStyle::PE_FocusRect, painter, r, listBox()->colorGroup() ); +} + +/* + * Constructor + * + * Creates child widgets of the ListBoxCombo widget + */ + +ListBoxCombo::ListBoxCombo( QWidget *parent, const char *name ) + : QVBox( parent, name ) +{ + setMargin( 5 ); + setSpacing( 5 ); + + unsigned int i; + QString str; + + QHBox *row1 = new QHBox( this ); + row1->setSpacing( 5 ); + + // Create a multi-selection ListBox... + lb1 = new QListBox( row1 ); + lb1->setSelectionMode( QListBox::Multi ); + + // ...insert a pixmap item... + lb1->insertItem( QPixmap( "qtlogo.png" ) ); + // ...and 100 text items + for ( i = 0; i < 100; i++ ) { + str = QString( "Listbox Item %1" ).arg( i ); + if ( !( i % 4 ) ) + lb1->insertItem( QPixmap( "fileopen.xpm" ), str ); + else + lb1->insertItem( str ); + } + + // Create a pushbutton... + QPushButton *arrow1 = new QPushButton( " -> ", row1 ); + // ...and connect the clicked SIGNAL with the SLOT slotLeft2Right + connect( arrow1, SIGNAL( clicked() ), this, SLOT( slotLeft2Right() ) ); + + // create an empty single-selection ListBox + lb2 = new QListBox( row1 ); + + QHBox *row2 = new QHBox( this ); + row2->setSpacing( 5 ); + + QVBox *box1 = new QVBox( row2 ); + box1->setSpacing( 5 ); + + // Create a non-editable Combobox and a label below... + QComboBox *cb1 = new QComboBox( FALSE, box1 ); + label1 = new QLabel( "Current Item: Combobox Item 0", box1 ); + label1->setMaximumHeight( label1->sizeHint().height() * 2 ); + label1->setFrameStyle( QFrame::Panel | QFrame::Sunken ); + + //...and insert 50 items into the Combobox + for ( i = 0; i < 50; i++ ) { + str = QString( "Combobox Item %1" ).arg( i ); + if ( i % 9 ) + cb1->insertItem( str ); + else + cb1->listBox()->insertItem( new MyListBoxItem ); + } + + QVBox *box2 = new QVBox( row2 ); + box2->setSpacing( 5 ); + + // Create an editable Combobox and a label below... + QComboBox *cb2 = new QComboBox( TRUE, box2 ); + label2 = new QLabel( "Current Item: Combobox Item 0", box2 ); + label2->setMaximumHeight( label2->sizeHint().height() * 2 ); + label2->setFrameStyle( QFrame::Panel | QFrame::Sunken ); + + // ... and insert 50 items into the Combobox + for ( i = 0; i < 50; i++ ) { + str = QString( "Combobox Item %1" ).arg( i ); + if ( !( i % 4 ) ) + cb2->insertItem( QPixmap( "fileopen.xpm" ), str ); + else + cb2->insertItem( str ); + } + + // Connect the activated SIGNALs of the Comboboxes with SLOTs + connect( cb1, SIGNAL( activated( const QString & ) ), this, SLOT( slotCombo1Activated( const QString & ) ) ); + connect( cb2, SIGNAL( activated( const QString & ) ), this, SLOT( slotCombo2Activated( const QString & ) ) ); +} + +/* + * SLOT slotLeft2Right + * + * Copies all selected items of the first ListBox into the + * second ListBox + */ + +void ListBoxCombo::slotLeft2Right() +{ + // Go through all items of the first ListBox + for ( unsigned int i = 0; i < lb1->count(); i++ ) { + QListBoxItem *item = lb1->item( i ); + // if the item is selected... + if ( item->isSelected() ) { + // ...and it is a text item... + if ( item->pixmap() && !item->text().isEmpty() ) + lb2->insertItem( *item->pixmap(), item->text() ); + else if ( !item->pixmap() ) + lb2->insertItem( item->text() ); + else if ( item->text().isEmpty() ) + lb2->insertItem( *item->pixmap() ); + } + } +} + +/* + * SLOT slotCombo1Activated( const QString &s ) + * + * Sets the text of the item which the user just selected + * in the first Combobox (and is now the value of s) to + * the first Label. + */ + +void ListBoxCombo::slotCombo1Activated( const QString &s ) +{ + label1->setText( QString( "Current Item: %1" ).arg( s ) ); +} + +/* + * SLOT slotCombo2Activated( const QString &s ) + * + * Sets the text of the item which the user just selected + * in the second Combobox (and is now the value of s) to + * the second Label. + */ + +void ListBoxCombo::slotCombo2Activated( const QString &s ) +{ + label2->setText( QString( "Current Item: %1" ).arg( s ) ); +} |