1 files changed, 178 insertions, 0 deletions
diff --git a/src/gui/kwidgetlister.cpp b/src/gui/kwidgetlister.cpp
new file mode 100644
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--- /dev/null
+++ b/src/gui/kwidgetlister.cpp
@@ -0,0 +1,178 @@
+/*  -*- c++ -*-
+    kwidgetlister.cpp
+
+    This file is part of libkdenetwork.
+    Copyright (c) 2001 Marc Mutz <mutz@kde.org>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License,
+    version 2, as published by the Free Software Foundation.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifh Floor, Boston, MA  02110-1301  USA
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of this library with any edition of
+    the Qt library by Trolltech AS, Norway (or with modified versions
+    of Qt that use the same license as Qt), and distribute linked
+    combinations including the two.  You must obey the GNU General
+    Public License in all respects for all of the code used other than
+    Qt.  If you modify this file, you may extend this exception to
+    your version of the file, but you are not obligated to do so.  If
+    you do not wish to do so, delete this exception statement from
+    your version.
+*/
+
+#include "kwidgetlister.h"
+
+#include <klocale.h>
+#include <kdebug.h>
+#include <kpushbutton.h>
+#include <kiconloader.h>
+
+#include <qlayout.h>
+#include <qhbox.h>
+
+#include <assert.h>
+
+KWidgetLister::KWidgetLister( int minWidgets, int maxWidgets, QWidget *parent, const char* name )
+  : QWidget( parent, name )
+{
+  mWidgetList.setAutoDelete(TRUE);
+
+  mMinWidgets = QMAX( minWidgets, 1 );
+  mMaxWidgets = QMAX( maxWidgets, mMinWidgets + 1 );
+
+  //--------- the button box
+  mLayout = new QVBoxLayout(this, 0, 4);
+  mButtonBox = new QHBox(this);
+  mButtonBox->setSpacing(4);
+  mLayout->addWidget( mButtonBox );
+
+  mBtnMore = new KPushButton( i18n("more widgets","More"), mButtonBox );
+  mBtnMore->setIconSet(SmallIconSet(QString::fromLatin1("down")));
+  mButtonBox->setStretchFactor( mBtnMore, 0 );
+
+  mBtnFewer = new KPushButton( i18n("fewer widgets","Fewer"), mButtonBox );
+  mBtnFewer->setIconSet(SmallIconSet(QString::fromLatin1("up")));
+  mButtonBox->setStretchFactor( mBtnFewer, 0 );
+
+  QWidget *spacer = new QWidget( mButtonBox );
+  mButtonBox->setStretchFactor( spacer, 1 );
+
+  mBtnClear = new KPushButton( i18n("clear widgets","Clear"), mButtonBox );
+  mBtnClear->setIconSet(SmallIconSet(QString::fromLatin1("locationbar_erase")));
+  mButtonBox->setStretchFactor( mBtnClear, 0 );
+
+  //---------- connect everything
+  connect( mBtnMore, SIGNAL(clicked()),
+     this, SLOT(slotMore()) );
+  connect( mBtnFewer, SIGNAL(clicked()),
+     this, SLOT(slotFewer()) );
+  connect( mBtnClear, SIGNAL(clicked()),
+     this, SLOT(slotClear()) );
+
+  enableControls();
+}
+
+KWidgetLister::~KWidgetLister()
+{
+}
+
+void KWidgetLister::slotMore()
+{
+  // the class should make certain that slotMore can't
+  // be called when mMaxWidgets are on screen.
+  assert( (int)mWidgetList.count() < mMaxWidgets );
+
+  addWidgetAtEnd();
+  //  adjustSize();
+  enableControls();
+}
+
+void KWidgetLister::slotFewer()
+{
+  // the class should make certain that slotFewer can't
+  // be called when mMinWidgets are on screen.
+  assert( (int)mWidgetList.count() > mMinWidgets );
+
+  removeLastWidget();
+  //  adjustSize();
+  enableControls();
+}
+
+void KWidgetLister::slotClear()
+{
+  setNumberOfShownWidgetsTo( mMinWidgets );
+
+  // clear remaining widgets
+  QPtrListIterator<QWidget> it( mWidgetList );
+  for ( it.toFirst() ; it.current() ; ++it )
+    clearWidget( (*it) );
+
+  //  adjustSize();
+  enableControls();
+  emit clearWidgets();
+}
+
+void KWidgetLister::addWidgetAtEnd(QWidget *w)
+{
+  if (!w) w = this->createWidget(this);
+
+  mLayout->insertWidget( mLayout->findWidget( mButtonBox ), w );
+  mWidgetList.append( w );
+  w->show();
+  enableControls();
+  emit widgetAdded();
+  emit widgetAdded(w);
+}
+
+void KWidgetLister::removeLastWidget()
+{
+  // The layout will take care that the
+  // widget is removed from screen, too.
+  mWidgetList.removeLast();
+  enableControls();
+  emit widgetRemoved();
+}
+
+void KWidgetLister::clearWidget( QWidget* /*aWidget*/ )
+{
+}
+
+QWidget* KWidgetLister::createWidget( QWidget* parent )
+{
+  return new QWidget( parent );
+}
+
+void KWidgetLister::setNumberOfShownWidgetsTo( int aNum )
+{
+  int superfluousWidgets = QMAX( (int)mWidgetList.count() - aNum, 0 );
+  int missingWidgets     = QMAX( aNum - (int)mWidgetList.count(), 0 );
+
+  // remove superfluous widgets
+  for ( ; superfluousWidgets ; superfluousWidgets-- )
+    removeLastWidget();
+
+  // add missing widgets
+  for ( ; missingWidgets ; missingWidgets-- )
+    addWidgetAtEnd();
+}
+
+void KWidgetLister::enableControls()
+{
+  int count = mWidgetList.count();
+  bool isMaxWidgets = ( count >= mMaxWidgets );
+  bool isMinWidgets = ( count <= mMinWidgets );
+
+  mBtnMore->setEnabled( !isMaxWidgets );
+  mBtnFewer->setEnabled( !isMinWidgets );
+}
+
+#include "kwidgetlister.moc"