collapsiblewidget.cpp

   1 /*
   2    This file is part of the KDE libraries
   3    Copyright (C) 2005 Daniel Molkentin <molkentin@kde.org>
   4
   5    This library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public
   7    License version 2 as published by the Free Software Foundation.
   8
   9    This library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public License
  15    along with this library; see the file COPYING.LIB.  If not, write to
  16    the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  17    Boston, MA 02110-1301, USA.
  18 */
  19
  20 #include <QtGui>
  21 #include <QTimeLine>
  22 #include <collapsiblewidget.h>
  23
  24 /******************************************************************
  25  * Private classes
  26  *****************************************************************/
  27
  28 class CollapsibleWidget::Private
  29 {
  30     public:
  31         bool            expanded;
  32         QGridLayout    *gridLayout;
  33         QWidget        *innerWidget;
  34         QTimeLine      *timeline;
  35 };
  36
  37 class SettingsContainer::Private
  38 {
  39     public:
  40         QVBoxLayout *layout;
  41 };
  42
  43 /******************************************************************
  44  * Implementation
  45  *****************************************************************/
  46
  47 SettingsContainer::SettingsContainer(QWidget *parent)
  48 : QScrollArea( parent ), d(new SettingsContainer::Private)
  49 {
  50     QWidget *w = new QWidget;
  51     QVBoxLayout *helperLay = new QVBoxLayout(w);
  52     d->layout = new QVBoxLayout;
  53     helperLay->addLayout( d->layout );
  54     helperLay->addStretch(1);
  55     setWidget(w);
  56     setWidgetResizable(true);
  57 }
  58
  59 SettingsContainer::~SettingsContainer()
  60 {
  61     delete d;
  62 }
  63
  64 CollapsibleWidget* SettingsContainer::insertWidget( QWidget *w, const QString& name )
  65 {
  66     Q_UNUSED( name )
  67
  68     if ( w && w->layout() ) {
  69         QLayout *lay = w->layout();
  70         lay->setMargin(2);
  71         lay->setSpacing(0);
  72     }
  73
  74     CollapsibleWidget *cw = new CollapsibleWidget( this );
  75     d->layout->addWidget( cw );
  76     cw->setInnerWidget( w );
  77     return cw;
  78 }
  79
  80 CollapsibleWidget::CollapsibleWidget(QWidget *parent)
  81 : QWidget(parent), d(new CollapsibleWidget::Private)
  82 {
  83     init();
  84 }
  85
  86 void CollapsibleWidget::init()
  87 {
  88     d->expanded = false;
  89     d->innerWidget = 0;
  90
  91     d->timeline = new QTimeLine( 150, this );
  92     d->timeline->setCurveShape( QTimeLine::EaseInOutCurve );
  93     connect( d->timeline, SIGNAL(valueChanged(qreal)),
  94             this, SLOT(animateCollapse(qreal)) );
  95     connect( d->timeline, SIGNAL(finished()),
  96             this, SLOT(signalCompletion()) );
  97
  98     d->gridLayout = new QGridLayout( this );
  99     d->gridLayout->setMargin(0);
 100
 101     setExpanded(false);
 102     setEnabled(false);
 103 }
 104
 105 CollapsibleWidget::~CollapsibleWidget()
 106 {
 107     delete d;
 108 }
 109
 110 QWidget* CollapsibleWidget::innerWidget() const
 111 {
 112     return d->innerWidget;
 113 }
 114
 115 void CollapsibleWidget::setInnerWidget(QWidget *w)
 116 {
 117     if (!w) {
 118         return;
 119     }
 120
 121     d->innerWidget = w;
 122
 123     if ( !isExpanded() ) {
 124         d->innerWidget->hide();
 125     }
 126     d->gridLayout->addWidget( d->innerWidget, 2, 2 );
 127     d->gridLayout->setRowStretch( 2, 1 );
 128
 129     setEnabled( true );
 130
 131     if ( isExpanded() ) {
 132         setExpanded( true );
 133     }
 134 }
 135
 136 void CollapsibleWidget::setExpanded(bool expanded)
 137 {
 138     if ( !d->innerWidget ) {
 139         return;
 140     }
 141
 142     d->expanded = expanded;
 143
 144     if ( !expanded ) {
 145         d->innerWidget->setVisible( false );
 146     }
 147
 148     d->timeline->setDirection( expanded ? QTimeLine::Forward
 149                                         : QTimeLine::Backward );
 150     d->timeline->start();
 151 }
 152
 153 void CollapsibleWidget::animateCollapse( qreal showAmount )
 154 {
 155     int pixels = d->innerWidget->sizeHint().height() * showAmount;
 156
 157     d->gridLayout->setRowMinimumHeight( 2, pixels );
 158
 159     if ( showAmount == 1 ) {
 160         d->innerWidget->setVisible( true );
 161     }
 162 }
 163
 164 void CollapsibleWidget::signalCompletion()
 165 {
 166     if ( isExpanded() ) {
 167         emit expandCompleted();
 168     } else {
 169         emit collapseCompleted();
 170     }
 171 }
 172
 173 bool CollapsibleWidget::isExpanded() const
 174 {
 175     return d->expanded;
 176 }
 177
 178 #include "collapsiblewidget.moc"