keduca/keducabuilder/ktagcombobox.cpp

   1 /*
   2  * ktagcombobox.cpp - A combobox with support for submenues, icons and tags
   3  *
   4  * Copyright (c) 1999-2000 Hans Petter Bieker <bieker@kde.org>
   5  *
   6  * Requires the Qt widget libraries, available at no cost at
   7  * http://www.troll.no/
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  */
  23
  24 #define INCLUDE_MENUITEM_DEF 1
  25 #include <qpainter.h>
  26 #include <qpopupmenu.h>
  27 #include <kdebug.h>
  28
  29
  30 #include "ktagcombobox.h"
  31 #include "ktagcombobox.moc"
  32
  33 KTagComboBox::~KTagComboBox ()
  34 {
  35     delete _popup;
  36     delete _tags;
  37 }
  38
  39 KTagComboBox::KTagComboBox (QWidget * parent, const char *name)
  40     : QComboBox(parent, name)
  41 {
  42     _popup = new QPopupMenu(this);
  43     _tags = new QStringList;
  44     connect( _popup, SIGNAL(activated(int)),
  45              SLOT(internalActivate(int)) );
  46     connect( _popup, SIGNAL(highlighted(int)),
  47              SLOT(internalHighlight(int)) );
  48 }
  49
  50 void KTagComboBox::popupMenu()
  51 {
  52     _popup->popup( mapToGlobal( QPoint(0,0) ), _current );
  53 }
  54
  55 void KTagComboBox::keyPressEvent( QKeyEvent *e )
  56 {
  57     int c;
  58
  59     if ( ( e->key() == Key_F4 && e->state() == 0 ) ||
  60          ( e->key() == Key_Down && (e->state() & AltButton) ) ||
  61          ( e->key() == Key_Space ) ) {
  62         if ( count() ) {
  63             _popup->setActiveItem( _current );
  64             popupMenu();
  65         }
  66         return;
  67     } else {
  68         e->ignore();
  69         return;
  70     }
  71
  72     c = currentItem();
  73     emit highlighted( c );
  74     emit activated( c );
  75 }
  76
  77 void KTagComboBox::mousePressEvent( QMouseEvent * )
  78 {
  79     popupMenu();
  80 }
  81
  82 void KTagComboBox::internalActivate( int index )
  83 {
  84     if (_current == index) return;
  85     _current = index;
  86     emit activated( index );
  87     repaint();
  88 }
  89
  90 void KTagComboBox::internalHighlight( int index )
  91 {
  92     emit highlighted( index );
  93 }
  94
  95 void KTagComboBox::clear()
  96 {
  97     _popup->clear();
  98     _tags->clear();
  99 }
 100
 101 int KTagComboBox::count() const
 102 {
 103     return _tags->count();
 104 }
 105
 106 static inline QPopupMenu *checkInsertIndex(QPopupMenu *popup, const QStringList *tags, const QString &submenu, int *index)
 107 {
 108     int pos = tags->findIndex(submenu);
 109
 110     QPopupMenu *pi = 0;
 111     if (pos != -1)
 112     {
 113         QMenuItem *p = popup->findItem(popup->idAt(pos));
 114         pi = p?p->popup():0;
 115     }
 116     if (!pi) pi = popup;
 117
 118     if (*index > (int)pi->count())
 119         *index = -1;
 120
 121     return pi;
 122 }
 123
 124 void KTagComboBox::insertItem(const QIconSet& icon, const QString &text, const QString &tag, const QString &submenu, int index )
 125 {
 126     QPopupMenu *pi = checkInsertIndex(_popup, _tags, submenu, &index);
 127     pi->insertItem(icon, text, count(), index);
 128     _tags->append(tag);
 129 }
 130
 131 void KTagComboBox::insertItem(const QString &text, const QString &tag, const QString &submenu, int index )
 132 {
 133     QPopupMenu *pi = checkInsertIndex(_popup, _tags, submenu, &index);
 134     pi->insertItem(text, count(), index);
 135     _tags->append(tag);
 136 }
 137
 138 void KTagComboBox::insertSeparator(const QString &submenu, int index)
 139 {
 140     QPopupMenu *pi = checkInsertIndex(_popup, _tags, submenu, &index);
 141     pi->insertSeparator(index);
 142     _tags->append(QString::null);
 143 }
 144
 145 void KTagComboBox::insertSubmenu(const QString &text, const QString &tag, const QString &submenu, int index)
 146 {
 147     QPopupMenu *pi = checkInsertIndex(_popup, _tags, submenu, &index);
 148     QPopupMenu *p = new QPopupMenu(pi);
 149     pi->insertItem(text, p, count(), index);
 150     _tags->append(tag);
 151     connect( p, SIGNAL(activated(int)),
 152              SLOT(internalActivate(int)) );
 153     connect( p, SIGNAL(highlighted(int)),
 154              SLOT(internalHighlight(int)) );
 155 }
 156
 157 void KTagComboBox::changeItem( const QString &text, int index )
 158 {
 159     _popup->changeItem( text, index);
 160     if (index == _current)
 161         repaint();
 162 }
 163
 164 void KTagComboBox::paintEvent( QPaintEvent * ev)
 165 {
 166     QComboBox::paintEvent(ev);
 167
 168     QPainter p (this);
 169
 170     // Text
 171     QRect clip(2, 2, width() - 4, height() - 4);
 172     if ( hasFocus())
 173         p.setPen( colorGroup().highlightedText() );
 174     p.drawText(clip, AlignCenter | SingleLine, _popup->text( _current ));
 175
 176     // Icon
 177     QIconSet *icon = _popup->iconSet( _current );
 178     if (icon) {
 179         QPixmap pm = icon->pixmap();
 180         p.drawPixmap( 4, (height()-pm.height())/2, pm );
 181     }
 182 }
 183
 184 bool KTagComboBox::containsTag( const QString &str ) const
 185 {
 186     return _tags->contains(str) > 0;
 187 }
 188
 189 QString KTagComboBox::currentTag() const
 190 {
 191     return *_tags->at(currentItem());
 192 }
 193
 194 QString KTagComboBox::tag(int i) const
 195 {
 196     if (i < 0 || i >= count())
 197     {
 198         kdDebug() << "KTagComboBox::tag(), unknown tag " << i << endl;
 199         return QString::null;
 200     }
 201     return *_tags->at(i);
 202 }
 203
 204 int KTagComboBox::currentItem() const
 205 {
 206     return _current;
 207 }
 208
 209 void KTagComboBox::setCurrentItem(int i)
 210 {
 211     if (i < 0 || i >= count()) return;
 212     _current = i;
 213     repaint();
 214 }
 215
 216 void KTagComboBox::setCurrentItem(const QString &code)
 217 {
 218     int i = _tags->findIndex(code);
 219     if (code.isNull())
 220         i = 0;
 221     if (i != -1)
 222         setCurrentItem(i);
 223 }
 224
 225 void KTagComboBox::setFont( const QFont &font )
 226 {
 227     QComboBox::setFont( font );
 228     _popup->setFont( font );
 229 }