File indexing completed on 2025-12-07 04:08:18

 /* ============================================================
  *
  * This file is a part of digiKam project
  * https://www.digikam.org
  *
  * Date        : 2008-08-21
  * Description : a combo box with a width not depending of text
  *               content size
  *
  * SPDX-FileCopyrightText: 2006-2024 by Gilles Caulier <caulier dot gilles at gmail dot com>
  * SPDX-FileCopyrightText:      2008 by Andi Clemens <andi dot clemens at googlemail dot com>
  * SPDX-FileCopyrightText:      2005 by Tom Albers <tomalbers at kde dot nl>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * ============================================================ */
 
 #include "squeezedcombobox.h"
 
 // Qt includes
 
 #include <QTimer>
 #include <QStyle>
 #include <QApplication>
 #include <QResizeEvent>
 
 namespace Digikam
 {
 
 class Q_DECL_HIDDEN SqueezedComboBox::Private
 {
 public:
 
     explicit Private()
       : timer(nullptr)
     {
     }
 
     QMap<int, QString> originalItems;
 
     QTimer*            timer;
 };
 
 SqueezedComboBox::SqueezedComboBox(QWidget* const parent, const char* name)
     : QComboBox(parent),
       d        (new Private)
 {
     setObjectName(QString::fromUtf8(name));
     setMinimumWidth(100);
 
     d->timer = new QTimer(this);
     d->timer->setSingleShot(true);
 
     connect(d->timer, &QTimer::timeout,
             this, &SqueezedComboBox::slotTimeOut);
 
     connect(this, static_cast<void (SqueezedComboBox::*)(int)>(&SqueezedComboBox::activated),
             this, &SqueezedComboBox::slotUpdateToolTip);
 }
 
 SqueezedComboBox::~SqueezedComboBox()
 {
     d->originalItems.clear();
     delete d->timer;
     delete d;
 }
 
 bool SqueezedComboBox::contains(const QString& text) const
 {
     if (text.isEmpty())
     {
         return false;
     }
 
     for (QMap<int, QString>::const_iterator it = d->originalItems.constBegin() ;
          it != d->originalItems.constEnd() ; ++it)
     {
         if (it.value() == text)
         {
             return true;
         }
     }
 
     return false;
 }
 
 int SqueezedComboBox::findOriginalText(const QString& text,
                                        Qt::CaseSensitivity cs) const
 {
     if (text.isEmpty())
     {
         return -1;
     }
 
     for (QMap<int, QString>::const_iterator it = d->originalItems.constBegin() ;
          it != d->originalItems.constEnd() ; ++it)
     {
         if (it.value().compare(text, cs) == 0)
         {
             return it.key();
         }
     }
 
     return -1;
 }
 
 QSize SqueezedComboBox::sizeHint() const
 {
     ensurePolished();
     QFontMetrics fm = fontMetrics();
     int maxW        = count() ? 18 : 7 * fm.horizontalAdvance(QLatin1Char('x')) + 18;
     int maxH        = qMax(fm.lineSpacing(), 14) + 2;
 
     QStyleOptionComboBox options;
     options.initFrom(this);
 
     return style()->sizeFromContents(QStyle::CT_ComboBox, &options, QSize(maxW, maxH), this);
 }
 
 void SqueezedComboBox::insertSqueezedItem(const QString& newItem, int index,
                                           const QVariant& userData)
 {
     d->originalItems[index] = newItem;
     QComboBox::insertItem(index, squeezeText(newItem), userData);
 
     // if this is the first item, set the tooltip.
 
     if (index == 0)
     {
         slotUpdateToolTip(0);
     }
 }
 
 void SqueezedComboBox::insertSqueezedList(const QStringList& newItems, int index)
 {
     for (QStringList::const_iterator it = newItems.constBegin() ;
          it != newItems.constEnd() ; ++it)
     {
         insertSqueezedItem(*it, index);
         ++index;
     }
 }
 
 void SqueezedComboBox::addSqueezedItem(const QString& newItem,
                                        const QVariant& userData)
 {
     insertSqueezedItem(newItem, count(), userData);
 }
 
 void SqueezedComboBox::setCurrent(const QString& itemText)
 {
     QString squeezedText = squeezeText(itemText);
     qint32 itemIndex     = findText(squeezedText);
 
     if (itemIndex >= 0)
     {
         setCurrentIndex(itemIndex);
     }
 }
 
 void SqueezedComboBox::resizeEvent(QResizeEvent *)
 {
     d->timer->start(200);
 }
 
 void SqueezedComboBox::slotTimeOut()
 {
     for (QMap<int, QString>::iterator it = d->originalItems.begin() ;
          it != d->originalItems.end() ; ++it)
     {
         setItemText(it.key(), squeezeText(it.value()));
     }
 }
 
 QString SqueezedComboBox::squeezeText(const QString& original) const
 {
     // not the complete widgetSize is usable. Need to compensate for that.
 
     int widgetSize = width() - 30;
     QFontMetrics fm(fontMetrics());
 
     // If we can fit the full text, return that.
 
     if (fm.horizontalAdvance(original) < widgetSize)
     {
         return (original);
     }
 
     // We need to squeeze.
 
     QString sqItem = original; // prevent empty return value;
     widgetSize     = widgetSize-fm.horizontalAdvance(QLatin1String("..."));
 
     for (int i = 0 ; i != original.length() ; ++i)
     {
         if ((int)fm.horizontalAdvance(original.right(i)) > widgetSize)
         {
             sqItem = QString(original.left(i) + QLatin1String("..."));
             break;
         }
     }
 
     return sqItem;
 }
 
 void SqueezedComboBox::slotUpdateToolTip(int index)
 {
      setToolTip(d->originalItems[index]);
 
      Q_EMIT signalItemActivated(item(index));
 }
 
 QString SqueezedComboBox::itemHighlighted() const
 {
     int curItem = currentIndex();
 
     return d->originalItems[curItem];
 }
 
 QString SqueezedComboBox::item(int index) const
 {
     return d->originalItems[index];
 }
 
 } // namespace Digikam
 
 #include "moc_squeezedcombobox.cpp"