workspace/kwin/kcmkwin/kwindecoration/buttons.cpp

   1 /*
   2         This is the new kwindecoration kcontrol module
   3
   4         Copyright (c) 2004, Sandro Giessl <sandro@giessl.com>
   5         Copyright (c) 2001
   6                 Karol Szwed <gallium@kde.org>
   7                 http://gallium.n3.net/
   8
   9         Supports new kwin configuration plugins, and titlebar button position
  10         modification via dnd interface.
  11
  12         Based on original "kwintheme" (Window Borders)
  13         Copyright (C) 2001 Rik Hemsley (rikkus) <rik@kde.org>
  14
  15     This program is free software; you can redistribute it and/or modify
  16     it under the terms of the GNU General Public License as published by
  17     the Free Software Foundation; either version 2 of the License, or
  18     (at your option) any later version.
  19
  20     This program is distributed in the hope that it will be useful,
  21     but WITHOUT ANY WARRANTY; without even the implied warranty of
  22     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23     GNU General Public License for more details.
  24
  25     You should have received a copy of the GNU General Public License
  26     along with this program; if not, write to the Free Software
  27     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  28
  29 */
  30
  31 #include <q3header.h>
  32 #include <QPainter>
  33 #include <QLabel>
  34 #include <QLayout>
  35 #include <QStyle>
  36 //Added by qt3to4:
  37 #include <QPixmap>
  38 #include <QDragLeaveEvent>
  39 #include <QDragMoveEvent>
  40 #include <QDropEvent>
  41 #include <QFrame>
  42 #include <QResizeEvent>
  43 #include <QVBoxLayout>
  44 #include <QDragEnterEvent>
  45 #include <QMouseEvent>
  46
  47 #include <kdebug.h>
  48
  49 #include <kdialog.h>
  50 #include <klocale.h>
  51 #include <kglobalsettings.h>
  52
  53 #include <kdecorationfactory.h>
  54
  55 #include "buttons.h"
  56 #include "pixmaps.h"
  57
  58
  59 #define BUTTONDRAGMIMETYPE "application/x-kde_kwindecoration_buttons"
  60 ButtonDrag::ButtonDrag( Button btn, QWidget* parent, const char* name)
  61         : Q3StoredDrag( BUTTONDRAGMIMETYPE, parent, name)
  62 {
  63         QByteArray data;
  64         QDataStream stream(&data, QIODevice::WriteOnly);
  65         stream << btn.name;
  66         stream << btn.icon;
  67         stream << btn.type.unicode();
  68         stream << (int) btn.duplicate;
  69         stream << (int) btn.supported;
  70         setEncodedData( data );
  71 }
  72
  73
  74 bool ButtonDrag::canDecode( QDropEvent* e )
  75 {
  76         return e->provides( BUTTONDRAGMIMETYPE );
  77 }
  78
  79 bool ButtonDrag::decode( QDropEvent* e, Button& btn )
  80 {
  81         QByteArray data = e->mimeData()->data( BUTTONDRAGMIMETYPE );
  82         if ( data.size() )
  83         {
  84                 e->accept();
  85                 QDataStream stream(data);
  86                 stream >> btn.name;
  87                 stream >> btn.icon;
  88                 ushort type;
  89                 stream >> type;
  90                 btn.type = QChar(type);
  91                 int duplicate;
  92                 stream >> duplicate;
  93                 btn.duplicate = duplicate;
  94                 int supported;
  95                 stream >> supported;
  96                 btn.supported = supported;
  97                 return true;
  98         }
  99         return false;
 100 }
 101
 102
 103 Button::Button()
 104 {
 105 }
 106
 107 Button::Button(const QString& n, const QBitmap& i, QChar t, bool d, bool s)
 108         : name(n),
 109           icon(i),
 110           type(t),
 111           duplicate(d),
 112           supported(s)
 113 {
 114 }
 115
 116 Button::~Button()
 117 {
 118 }
 119
 120 // helper function to deal with the Button's bitmaps more easily...
 121 QPixmap bitmapPixmap(const QBitmap& bm, const QColor& color)
 122 {
 123         QPixmap pm(bm.size() );
 124         pm.setMask(bm);
 125         QPainter p(&pm);
 126         p.setPen(color);
 127         p.drawPixmap(0,0,bm);
 128         p.end();
 129         return pm;
 130 }
 131
 132
 133 ButtonSource::ButtonSource(QWidget *parent)
 134         : K3ListView(parent)
 135 {
 136         setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 137
 138         setResizeMode(Q3ListView::AllColumns);
 139         setDragEnabled(true);
 140         setAcceptDrops(true);
 141         setDropVisualizer(false);
 142         setSorting(-1);
 143         header()->setClickEnabled(false);
 144         header()->hide();
 145
 146         addColumn(i18n("Buttons") );
 147 }
 148
 149 ButtonSource::~ButtonSource()
 150 {
 151 }
 152
 153 QSize ButtonSource::sizeHint() const
 154 {
 155         // make the sizeHint height a bit smaller than the one of QListView...
 156
 157         if ( cachedSizeHint().isValid() )
 158                 return cachedSizeHint();
 159
 160         ensurePolished();
 161
 162         QSize s( header()->sizeHint() );
 163
 164         if ( verticalScrollBar()->isVisible() )
 165                 s.setWidth( s.width() + style()->pixelMetric(QStyle::PM_ScrollBarExtent) );
 166         s += QSize(frameWidth()*2,frameWidth()*2);
 167
 168         // size hint: 4 lines of text...
 169         s.setHeight( s.height() + fontMetrics().lineSpacing()*3 );
 170
 171         setCachedSizeHint( s );
 172
 173         return s;
 174 }
 175
 176 void ButtonSource::hideAllButtons()
 177 {
 178         Q3ListViewItemIterator it(this);
 179         while (it.current() ) {
 180                 it.current()->setVisible(false);
 181                 ++it;
 182         }
 183 }
 184
 185 void ButtonSource::showAllButtons()
 186 {
 187         Q3ListViewItemIterator it(this);
 188         while (it.current() ) {
 189                 it.current()->setVisible(true);
 190                 ++it;
 191         }
 192 }
 193
 194 void ButtonSource::showButton( QChar btn )
 195 {
 196         Q3ListViewItemIterator it(this);
 197         while (it.current() ) {
 198                 ButtonSourceItem *item = dynamic_cast<ButtonSourceItem*>(it.current() );
 199                 if (item && item->button().type == btn) {
 200                         it.current()->setVisible(true);
 201                         return;
 202                 }
 203                 ++it;
 204         }
 205 }
 206
 207 void ButtonSource::hideButton( QChar btn )
 208 {
 209         Q3ListViewItemIterator it(this);
 210         while (it.current() ) {
 211                 ButtonSourceItem *item = dynamic_cast<ButtonSourceItem*>(it.current() );
 212                 if (item && item->button().type == btn && !item->button().duplicate) {
 213                         it.current()->setVisible(false);
 214                         return;
 215                 }
 216                 ++it;
 217         }
 218 }
 219
 220 bool ButtonSource::acceptDrag(QDropEvent* e) const
 221 {
 222         return acceptDrops() && ButtonDrag::canDecode(e);
 223 }
 224
 225 Q3DragObject *ButtonSource::dragObject()
 226 {
 227         ButtonSourceItem *i = dynamic_cast<ButtonSourceItem*>(selectedItem() );
 228
 229         if (i) {
 230                 ButtonDrag *bd = new ButtonDrag(i->button(), viewport(), "button_drag");
 231                 bd->setPixmap(bitmapPixmap(i->button().icon, palette().color( QPalette::Foreground )));
 232                 return bd;
 233         }
 234
 235         return 0;
 236 }
 237
 238 ButtonDropSiteItem::ButtonDropSiteItem(const Button& btn)
 239         : m_button(btn)
 240 {
 241 }
 242
 243 ButtonDropSiteItem::~ButtonDropSiteItem()
 244 {
 245 }
 246
 247 Button ButtonDropSiteItem::button()
 248 {
 249         return m_button;
 250 }
 251
 252 int ButtonDropSiteItem::width()
 253 {
 254 //      return m_button.icon.width();
 255         return 20;
 256 }
 257
 258 int ButtonDropSiteItem::height()
 259 {
 260 //      return m_button.icon.height();
 261         return 20;
 262 }
 263
 264 void ButtonDropSiteItem::draw(QPainter *p, const QPalette& cg, const QRect &r)
 265 {
 266 //      p->fillRect(r, cg.base() );
 267         if (m_button.supported)
 268             p->setPen(cg.color(QPalette::Foreground) );
 269         else
 270             p->setPen( cg.color(QPalette::Mid) );
 271         QBitmap &i = m_button.icon;
 272         p->drawPixmap(r.left()+(r.width()-i.width())/2, r.top()+(r.height()-i.height())/2, i);
 273 }
 274
 275
 276 ButtonDropSite::ButtonDropSite( QWidget* parent, const char* name )
 277         : QFrame( parent ),
 278           m_selected(0)
 279 {
 280         setObjectName( name );
 281         setAcceptDrops( true );
 282         setFrameShape( WinPanel );
 283         setFrameShadow( Raised );
 284         setMinimumHeight( 26 );
 285         setMaximumHeight( 26 );
 286         setMinimumWidth( 250 );         // Ensure buttons will fit
 287 }
 288
 289 ButtonDropSite::~ButtonDropSite()
 290 {
 291         clearLeft();
 292         clearRight();
 293 }
 294
 295 void ButtonDropSite::clearLeft()
 296 {
 297         while (!buttonsLeft.isEmpty() ) {
 298                 ButtonDropSiteItem *item = buttonsLeft.first();
 299                 if (removeButton(item) ) {
 300                         emit buttonRemoved(item->button().type);
 301                         delete item;
 302                 }
 303         }
 304 }
 305
 306 void ButtonDropSite::clearRight()
 307 {
 308         while (!buttonsRight.isEmpty() ) {
 309                 ButtonDropSiteItem *item = buttonsRight.first();
 310                 if (removeButton(item) ) {
 311                         emit buttonRemoved(item->button().type);
 312                         delete item;
 313                 }
 314         }
 315 }
 316
 317 void ButtonDropSite::dragMoveEvent( QDragMoveEvent* e )
 318 {
 319         QPoint p = e->pos();
 320         if (leftDropArea().contains(p) || rightDropArea().contains(p) || buttonAt(p) ) {
 321                 e->accept();
 322
 323                 // 2 pixel wide drop visualizer...
 324                 QRect r = contentsRect();
 325                 int x = -1;
 326                 if (leftDropArea().contains(p) ) {
 327                         x = leftDropArea().left();
 328                 } else if (rightDropArea().contains(p) ) {
 329                         x = rightDropArea().right()+1;
 330                 } else {
 331                         ButtonDropSiteItem *item = buttonAt(p);
 332                         if (item) {
 333                                 if (p.x() < item->rect.left()+item->rect.width()/2 ) {
 334                                         x = item->rect.left();
 335                                 } else {
 336                                         x = item->rect.right()+1;
 337                                 }
 338                         }
 339                 }
 340                 if (x != -1) {
 341                         QRect tmpRect(x, r.y(), 2, r.height() );
 342                         if (tmpRect != m_oldDropVisualizer) {
 343                                 cleanDropVisualizer();
 344                                 m_oldDropVisualizer = tmpRect;
 345                                 update(tmpRect);
 346                         }
 347                 }
 348
 349         } else {
 350                 e->ignore();
 351
 352                 cleanDropVisualizer();
 353         }
 354 }
 355
 356 void ButtonDropSite::cleanDropVisualizer()
 357 {
 358         if (m_oldDropVisualizer.isValid())
 359         {
 360                 QRect rect = m_oldDropVisualizer;
 361                 m_oldDropVisualizer = QRect(); // rect is invalid
 362                 update(rect);
 363         }
 364 }
 365
 366 void ButtonDropSite::dragEnterEvent( QDragEnterEvent* e )
 367 {
 368         if ( ButtonDrag::canDecode( e ) )
 369                 e->accept();
 370 }
 371
 372 void ButtonDropSite::dragLeaveEvent( QDragLeaveEvent* /* e */ )
 373 {
 374         cleanDropVisualizer();
 375 }
 376
 377 void ButtonDropSite::dropEvent( QDropEvent* e )
 378 {
 379         cleanDropVisualizer();
 380
 381         QPoint p = e->pos();
 382
 383         // collect information where to insert the dropped button
 384         ButtonList *buttonList = 0;
 385         int         buttonPosition;
 386
 387         if (leftDropArea().contains(p) ) {
 388                 buttonList = &buttonsLeft;
 389                 buttonPosition = buttonsLeft.size();
 390         } else if (rightDropArea().contains(p) ) {
 391                 buttonList = &buttonsRight;
 392                 buttonPosition = 0;
 393         } else {
 394                 ButtonDropSiteItem *aboveItem = buttonAt(p);
 395                 if (!aboveItem)
 396                         return; // invalid drop. hasn't occurred _over_ a button (or left/right dropArea), return...
 397
 398                 int pos;
 399                 if (!getItemPos(aboveItem, buttonList, pos) ) {
 400                         // didn't find the aboveItem. unlikely to happen since buttonAt() already seems to have found
 401                         // something valid. anyway...
 402                         return;
 403                 }
 404
 405                 // got the list and the aboveItem position. now determine if the item should be inserted
 406                 // before aboveItem or after aboveItem.
 407                 QRect aboveItemRect = aboveItem->rect;
 408                 if (!aboveItemRect.isValid() )
 409                         return;
 410
 411                 if (p.x() < aboveItemRect.left()+aboveItemRect.width()/2 ) {
 412                         // insert before the item
 413                         buttonPosition = pos;
 414                 } else {
 415                         buttonPosition = pos + 1;
 416                 }
 417         }
 418
 419         // know where to insert the button. now see if we can use an existing item (drag within the widget = move)
 420         // orneed to create a new one
 421         ButtonDropSiteItem *buttonItem = 0;
 422         if (e->source() == this && m_selected) {
 423                 ButtonList *oldList = 0;
 424                 int oldPos;
 425                 if (getItemPos(m_selected, oldList, oldPos) ) {
 426                         if (oldPos == buttonPosition && oldList == buttonList)
 427                                 return; // button didn't change its position during the drag...
 428
 429                         oldList->removeAt(oldPos);
 430                         buttonItem = m_selected;
 431
 432                         // If we're inserting to the right of oldPos, in the same list,
 433                         // better adjust the index..
 434                         if (buttonList == oldList && buttonPosition > oldPos)
 435                                 --buttonPosition;
 436                 } else {
 437                         return; // m_selected not found, return...
 438                 }
 439         } else {
 440                 // create new button from the drop object...
 441                 Button btn;
 442                 if (ButtonDrag::decode(e, btn) ) {
 443                         buttonItem = new ButtonDropSiteItem(btn);
 444                 } else {
 445                         return; // something has gone wrong while we were trying to decode the drop event
 446                 }
 447         }
 448
 449         // now the item can actually be inserted into the list! :)
 450         (*buttonList).insert(buttonPosition, buttonItem);
 451         emit buttonAdded(buttonItem->button().type);
 452         emit changed();
 453         recalcItemGeometry();
 454         update();
 455 }
 456
 457 bool ButtonDropSite::getItemPos(ButtonDropSiteItem *item, ButtonList* &list, int &pos)
 458 {
 459         if (!item)
 460                 return false;
 461
 462         pos = buttonsLeft.indexOf(item); // try the left list first...
 463         if (pos >= 0) {
 464                 list = &buttonsLeft;
 465                 return true;
 466         }
 467
 468         pos = buttonsRight.indexOf(item); // try the right list...
 469         if (pos >= 0) {
 470                 list = &buttonsRight;
 471                 return true;
 472         }
 473
 474         list = 0;
 475         pos  = -1;
 476         return false;
 477 }
 478
 479 QRect ButtonDropSite::leftDropArea()
 480 {
 481         // return a 10 pixel drop area...
 482         QRect r = contentsRect();
 483
 484         int leftButtonsWidth = calcButtonListWidth(buttonsLeft);
 485         return QRect(r.left()+leftButtonsWidth, r.top(), 10, r.height() );
 486 }
 487
 488 QRect ButtonDropSite::rightDropArea()
 489 {
 490         // return a 10 pixel drop area...
 491         QRect r = contentsRect();
 492
 493         int rightButtonsWidth = calcButtonListWidth(buttonsRight);
 494         return QRect(r.right()-rightButtonsWidth-10, r.top(), 10, r.height() );
 495 }
 496
 497 void ButtonDropSite::mousePressEvent( QMouseEvent* e )
 498 {
 499         // TODO: only start the real drag after some drag distance
 500         m_selected = buttonAt(e->pos() );
 501         if (m_selected) {
 502                 ButtonDrag *bd = new ButtonDrag(m_selected->button(), this);
 503                 bd->setPixmap(bitmapPixmap(m_selected->button().icon, palette().color( QPalette::Foreground ) ) );
 504                 bd->dragMove();
 505         }
 506 }
 507
 508 void ButtonDropSite::resizeEvent(QResizeEvent*)
 509 {
 510         recalcItemGeometry();
 511 }
 512
 513 void ButtonDropSite::recalcItemGeometry()
 514 {
 515         QRect r = contentsRect();
 516
 517         // update the geometry of the items in the left button list
 518         int offset = r.left();
 519         for (ButtonList::const_iterator it = buttonsLeft.constBegin(); it != buttonsLeft.constEnd(); ++it) {
 520                 int w = (*it)->width();
 521                 (*it)->rect = QRect(offset, r.top(), w, (*it)->height() );
 522                 offset += w;
 523         }
 524
 525         // the right button list...
 526         offset = r.right() - calcButtonListWidth(buttonsRight);
 527         for (ButtonList::const_iterator it = buttonsRight.constBegin(); it != buttonsRight.constEnd(); ++it) {
 528                 int w = (*it)->width();
 529                 (*it)->rect = QRect(offset, r.top(), w, (*it)->height() );
 530                 offset += w;
 531         }
 532 }
 533
 534 ButtonDropSiteItem *ButtonDropSite::buttonAt(QPoint p) {
 535         // try to find the item in the left button list
 536         for (ButtonList::const_iterator it = buttonsLeft.constBegin(); it != buttonsLeft.constEnd(); ++it) {
 537                 if ( (*it)->rect.contains(p) ) {
 538                         return *it;
 539                 }
 540         }
 541
 542         // try to find the item in the right button list
 543         for (ButtonList::const_iterator it = buttonsRight.constBegin(); it != buttonsRight.constEnd(); ++it) {
 544                 if ( (*it)->rect.contains(p) ) {
 545                         return *it;
 546                 }
 547         }
 548
 549         return 0;
 550 }
 551
 552 bool ButtonDropSite::removeButton(ButtonDropSiteItem *item) {
 553         if (!item)
 554                 return false;
 555
 556         // try to remove the item from the left button list
 557         if (buttonsLeft.removeAll(item) >= 1) {
 558                 return true;
 559         }
 560
 561         // try to remove the item from the right button list
 562         if (buttonsRight.removeAll(item) >= 1) {
 563                 return true;
 564         }
 565
 566         return false;
 567 }
 568
 569 int ButtonDropSite::calcButtonListWidth(const ButtonList& btns)
 570 {
 571         int w = 0;
 572         for (ButtonList::const_iterator it = btns.constBegin(); it != btns.constEnd(); ++it) {
 573                 w += (*it)->width();
 574         }
 575
 576         return w;
 577 }
 578
 579 bool ButtonDropSite::removeSelectedButton()
 580 {
 581         bool succ = removeButton(m_selected);
 582         if (succ) {
 583                 emit buttonRemoved(m_selected->button().type);
 584                 emit changed();
 585                 delete m_selected;
 586                 m_selected = 0;
 587                 recalcItemGeometry();
 588                 update(); // repaint...
 589         }
 590
 591         return succ;
 592 }
 593
 594 void ButtonDropSite::drawButtonList(QPainter *p, const ButtonList& btns, int offset)
 595 {
 596         for (ButtonList::const_iterator it = btns.constBegin(); it != btns.constEnd(); ++it) {
 597                 QRect itemRect = (*it)->rect;
 598                 if (itemRect.isValid() ) {
 599                         (*it)->draw(p, palette(), itemRect);
 600                 }
 601                 offset += (*it)->width();
 602         }
 603 }
 604
 605 void ButtonDropSite::paintEvent( QPaintEvent* /*pe*/ )
 606 {
 607         QPainter p( this );
 608         int leftoffset = calcButtonListWidth( buttonsLeft );
 609         int rightoffset = calcButtonListWidth( buttonsRight );
 610         int offset = 3;
 611
 612         QRect r = contentsRect();
 613
 614         // Shrink by 1
 615         r.translate(1 + leftoffset, 1);
 616         r.setWidth( r.width() - 2 - leftoffset - rightoffset );
 617         r.setHeight( r.height() - 2 );
 618
 619         drawButtonList( &p, buttonsLeft, offset );
 620
 621         QColor c1( 0x0A, 0x5F, 0x89 );          // KDE 2 titlebar default colour
 622         p.fillRect( r, c1 );
 623         p.setPen( Qt::white );
 624         p.setFont( QFont( KGlobalSettings::generalFont().family(), 12, QFont::Bold) );
 625         p.drawText( r, Qt::AlignLeft | Qt::AlignVCenter, i18n("KDE") );
 626
 627         offset = geometry().width() - 3 - rightoffset;
 628         drawButtonList( &p, buttonsRight, offset );
 629
 630         if (m_oldDropVisualizer.isValid() )
 631         {
 632                 p.fillRect(m_oldDropVisualizer, Qt::Dense4Pattern);
 633         }
 634 }
 635
 636 ButtonSourceItem::ButtonSourceItem(Q3ListView * parent, const Button& btn)
 637         : Q3ListViewItem(parent),
 638           m_button(btn),
 639           m_dirty(true)
 640 {
 641         setButton(btn);
 642 }
 643
 644 ButtonSourceItem::~ButtonSourceItem()
 645 {
 646 }
 647
 648 void ButtonSourceItem::paintCell(QPainter *p, const QPalette &cg, int column, int width, int align)
 649 {
 650         // we need the color group cg, so to the work here, not in setButton...
 651         if (m_dirty) {
 652                 if (m_button.supported) {
 653                     setPixmap(0, bitmapPixmap(m_button.icon, cg.color( QPalette::Foreground ) ) );
 654                 } else {
 655                     setPixmap(0, bitmapPixmap(m_button.icon, cg.color( QPalette::Mid ) ) );
 656                 }
 657                 m_dirty = false;
 658         }
 659
 660         if (m_button.supported) {
 661                 Q3ListViewItem::paintCell(p,cg,column,width,align);
 662         } else {
 663                 // grey out unsupported buttons
 664                 QPalette cg2 = cg;
 665                 cg2.setColor(QPalette::Text, cg.color(QPalette::Mid) );
 666                 Q3ListViewItem::paintCell(p,cg2,column,width,align);
 667         }
 668 }
 669
 670 void ButtonSourceItem::setButton(const Button& btn)
 671 {
 672         m_button = btn;
 673         m_dirty = true; // update the pixmap when in paintCell()...
 674         if (btn.supported) {
 675                 setText(0, btn.name);
 676         } else {
 677                 setText(0, i18n("%1 (unavailable)", btn.name) );
 678         }
 679 }
 680
 681 Button ButtonSourceItem::button() const
 682 {
 683         return m_button;
 684 }
 685
 686
 687 ButtonPositionWidget::ButtonPositionWidget(QWidget *parent, const char* name)
 688     : QWidget(parent),
 689       m_factory(0)
 690 {
 691     setObjectName( name );
 692
 693         QVBoxLayout *layout = new QVBoxLayout(this);
 694     layout->setMargin(0);
 695     layout->setSpacing(KDialog::spacingHint());
 696         setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Maximum);
 697
 698         QLabel* label = new QLabel( this );
 699         m_dropSite = new ButtonDropSite( this );
 700         label->setWordWrap( true );
 701         label->setText( i18n( "To add or remove titlebar buttons, simply <i>drag</i> items "
 702                 "between the available item list and the titlebar preview. Similarly, "
 703                 "drag items within the titlebar preview to re-position them.") );
 704         m_buttonSource = new ButtonSource(this);
 705     m_buttonSource->setObjectName("button_source");
 706
 707         layout->addWidget(label);
 708         layout->addWidget(m_dropSite);
 709         layout->addWidget(m_buttonSource);
 710
 711         connect( m_dropSite, SIGNAL(buttonAdded(QChar)), m_buttonSource, SLOT(hideButton(QChar)) );
 712         connect( m_dropSite, SIGNAL(buttonRemoved(QChar)), m_buttonSource, SLOT(showButton(QChar)) );
 713         connect( m_buttonSource, SIGNAL(dropped(QDropEvent*, Q3ListViewItem*)), m_dropSite, SLOT(removeSelectedButton()) );
 714
 715         connect( m_dropSite, SIGNAL(changed()), SIGNAL(changed()) );
 716
 717         // insert all possible buttons into the source (backwards to keep the preferred order...)
 718         bool dummy;
 719         new ButtonSourceItem(m_buttonSource, getButton('R', dummy) );
 720         new ButtonSourceItem(m_buttonSource, getButton('L', dummy) );
 721         new ButtonSourceItem(m_buttonSource, getButton('B', dummy) );
 722         new ButtonSourceItem(m_buttonSource, getButton('F', dummy) );
 723         new ButtonSourceItem(m_buttonSource, getButton('X', dummy) );
 724         new ButtonSourceItem(m_buttonSource, getButton('A', dummy) );
 725         new ButtonSourceItem(m_buttonSource, getButton('I', dummy) );
 726         new ButtonSourceItem(m_buttonSource, getButton('H', dummy) );
 727         new ButtonSourceItem(m_buttonSource, getButton('S', dummy) );
 728         new ButtonSourceItem(m_buttonSource, getButton('M', dummy) );
 729         new ButtonSourceItem(m_buttonSource, getButton('_', dummy) );
 730 }
 731
 732 ButtonPositionWidget::~ButtonPositionWidget()
 733 {
 734 }
 735
 736 void ButtonPositionWidget::setDecorationFactory(KDecorationFactory *factory)
 737 {
 738         if (!factory)
 739                 return;
 740
 741         m_factory = factory;
 742
 743         // get the list of supported buttons
 744         if (m_factory->supports(KDecorationDefines::AbilityAnnounceButtons) ) {
 745                 QString supportedButtons;
 746
 747                 if (m_factory->supports(KDecorationDefines::AbilityButtonMenu) )
 748                         supportedButtons.append('M');
 749                 if (m_factory->supports(KDecorationDefines::AbilityButtonOnAllDesktops) )
 750                         supportedButtons.append('S');
 751                 if (m_factory->supports(KDecorationDefines::AbilityButtonSpacer) )
 752                         supportedButtons.append('_');
 753                 if (m_factory->supports(KDecorationDefines::AbilityButtonHelp) )
 754                         supportedButtons.append('H');
 755                 if (m_factory->supports(KDecorationDefines::AbilityButtonMinimize) )
 756                         supportedButtons.append('I');
 757                 if (m_factory->supports(KDecorationDefines::AbilityButtonMaximize) )
 758                         supportedButtons.append('A');
 759                 if (m_factory->supports(KDecorationDefines::AbilityButtonClose) )
 760                         supportedButtons.append('X');
 761                 if (m_factory->supports(KDecorationDefines::AbilityButtonAboveOthers) )
 762                         supportedButtons.append('F');
 763                 if (m_factory->supports(KDecorationDefines::AbilityButtonBelowOthers) )
 764                         supportedButtons.append('B');
 765                 if (m_factory->supports(KDecorationDefines::AbilityButtonShade) )
 766                         supportedButtons.append('L');
 767                 if (m_factory->supports(KDecorationDefines::AbilityButtonResize) )
 768                         supportedButtons.append('R');
 769
 770                 m_supportedButtons = supportedButtons;
 771         } else {
 772                 // enable only buttons available before AbilityButton* introduction
 773                 m_supportedButtons = "MSHIAX_";
 774         }
 775
 776         // update the button lists...
 777         // 1. set status on the source items...
 778         Q3ListViewItemIterator it(m_buttonSource);
 779         while (it.current() ) {
 780                 ButtonSourceItem *i = dynamic_cast<ButtonSourceItem*>(it.current() );
 781                 if (i) {
 782                         Button b = i->button();
 783                         b.supported = m_supportedButtons.contains(b.type);
 784                         i->setButton(b);
 785                 }
 786                 ++it;
 787         }
 788         // 2. rebuild the drop site items...
 789         setButtonsLeft(buttonsLeft() );
 790         setButtonsRight(buttonsRight() );
 791 }
 792
 793 Button ButtonPositionWidget::getButton(QChar type, bool& success) {
 794         success = true;
 795
 796         if (type == 'R') {
 797                 QBitmap bmp = QBitmap::fromData(QSize( resize_width, resize_height ), resize_bits);
 798                 bmp.setMask(bmp);
 799                 return Button(i18n("Resize"), bmp, 'R', false, m_supportedButtons.contains('R') );
 800         } else if (type == 'L') {
 801                 QBitmap bmp = QBitmap::fromData(QSize( shade_width, shade_height ), shade_bits);
 802                 bmp.setMask(bmp);
 803                 return Button(i18n("Shade"), bmp, 'L', false, m_supportedButtons.contains('L') );
 804         } else if (type == 'B') {
 805                 QBitmap bmp = QBitmap::fromData(QSize( keepbelowothers_width, keepbelowothers_height ), keepbelowothers_bits);
 806                 bmp.setMask(bmp);
 807                 return Button(i18n("Keep Below Others"), bmp, 'B', false, m_supportedButtons.contains('B') );
 808         } else if (type == 'F') {
 809                 QBitmap bmp = QBitmap::fromData(QSize( keepaboveothers_width, keepaboveothers_height ), keepaboveothers_bits);
 810                 bmp.setMask(bmp);
 811                 return Button(i18n("Keep Above Others"), bmp, 'F', false, m_supportedButtons.contains('F') );
 812         } else if (type == 'X') {
 813                 QBitmap bmp = QBitmap::fromData(QSize( close_width, close_height ), close_bits);
 814                 bmp.setMask(bmp);
 815                 return Button(i18n("Close"), bmp, 'X', false, m_supportedButtons.contains('X') );
 816         } else if (type == 'A') {
 817                 QBitmap bmp = QBitmap::fromData(QSize( maximize_width, maximize_height ), maximize_bits);
 818                 bmp.setMask(bmp);
 819                 return Button(i18n("Maximize"), bmp, 'A', false, m_supportedButtons.contains('A') );
 820         } else if (type == 'I') {
 821                 QBitmap bmp = QBitmap::fromData(QSize( minimize_width, minimize_height ), minimize_bits);
 822                 bmp.setMask(bmp);
 823                 return Button(i18n("Minimize"), bmp, 'I', false, m_supportedButtons.contains('I') );
 824         } else if (type == 'H') {
 825                 QBitmap bmp = QBitmap::fromData(QSize( help_width, help_height ), help_bits);
 826                 bmp.setMask(bmp);
 827                 return Button(i18n("Help"), bmp, 'H', false, m_supportedButtons.contains('H') );
 828         } else if (type == 'S') {
 829                 QBitmap bmp = QBitmap::fromData(QSize( onalldesktops_width, onalldesktops_height ), onalldesktops_bits);
 830                 bmp.setMask(bmp);
 831                 return Button(i18n("On All Desktops"), bmp, 'S', false, m_supportedButtons.contains('S') );
 832         } else if (type == 'M') {
 833                 QBitmap bmp = QBitmap::fromData(QSize( menu_width, menu_height ), menu_bits);
 834                 bmp.setMask(bmp);
 835                 return Button(i18n("Menu"), bmp, 'M', false, m_supportedButtons.contains('M') );
 836         } else if (type == '_') {
 837                 QBitmap bmp = QBitmap::fromData(QSize( spacer_width, spacer_height ), spacer_bits);
 838                 bmp.setMask(bmp);
 839                 return Button(i18n("--- spacer ---"), bmp, '_', true, m_supportedButtons.contains('_') );
 840         } else {
 841                 success = false;
 842                 return Button();
 843         }
 844 }
 845
 846 QString ButtonPositionWidget::buttonsLeft() const
 847 {
 848         ButtonList btns = m_dropSite->buttonsLeft;
 849         QString btnString = "";
 850         for (ButtonList::const_iterator it = btns.constBegin(); it != btns.constEnd(); ++it) {
 851                 btnString.append( (*it)->button().type );
 852         }
 853         return btnString;
 854 }
 855
 856 QString ButtonPositionWidget::buttonsRight() const
 857 {
 858         ButtonList btns = m_dropSite->buttonsRight;
 859         QString btnString = "";
 860         for (ButtonList::const_iterator it = btns.constBegin(); it != btns.constEnd(); ++it) {
 861                 btnString.append( (*it)->button().type );
 862         }
 863         return btnString;
 864 }
 865
 866 void ButtonPositionWidget::setButtonsLeft(const QString &buttons)
 867 {
 868         // to keep the button lists consistent, first remove all left buttons, then add buttons again...
 869         m_dropSite->clearLeft();
 870
 871         for (int i = 0; i < buttons.length(); ++i) {
 872                 bool succ = false;
 873                 Button btn = getButton(buttons[i], succ);
 874                 if (succ) {
 875                         m_dropSite->buttonsLeft.append(new ButtonDropSiteItem(btn) );
 876                         m_buttonSource->hideButton(btn.type);
 877                 }
 878         }
 879         m_dropSite->recalcItemGeometry();
 880         m_dropSite->update();
 881 }
 882
 883 void ButtonPositionWidget::setButtonsRight(const QString &buttons)
 884 {
 885         // to keep the button lists consistent, first remove all left buttons, then add buttons again...
 886         m_dropSite->clearRight();
 887
 888         for (int i = 0; i < buttons.length(); ++i) {
 889                 bool succ = false;
 890                 Button btn = getButton(buttons[i], succ);
 891                 if (succ) {
 892                         m_dropSite->buttonsRight.append(new ButtonDropSiteItem(btn) );
 893                         m_buttonSource->hideButton(btn.type);
 894                 }
 895         }
 896         m_dropSite->recalcItemGeometry();
 897         m_dropSite->update();
 898 }
 899
 900 #include "buttons.moc"
 901 // vim: ts=4
 902 // kate: space-indent off; tab-width 4;