Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 616 insertions, 0 deletions

diff --git a/kviewshell/marklist.cpp b/kviewshell/marklist.cpp
new file mode 100644
index 00000000..8e39f619
--- /dev/null
+++ b/kviewshell/marklist.cpp
@@ -0,0 +1,616 @@
+/* This file is part of the KDE project
+   Copyright (C) 2004 Wilfried Huss <[email protected]>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#include <config.h>
+
+#include <qcheckbox.h>
+#include <qimage.h>
+#include <qlabel.h>
+#include <qlayout.h>
+#include <qtooltip.h>
+#include <qlabel.h>
+#include <qwhatsthis.h>
+#include <qpainter.h>
+#include <qtimer.h>
+
+#include <kapplication.h>
+#include <kglobalsettings.h>
+#include <klocale.h>
+#include <kpopupmenu.h>
+#include <kiconloader.h>
+#include <kdebug.h>
+
+#include "documentPageCache.h"
+#include "kvsprefs.h"
+#include "marklist.h"
+
+
+#include "marklist.moc"
+
+
+namespace {
+
+/** Holds the icon used as a overlay on pages which are not drawn yet. */
+QPixmap* waitIcon = 0;
+
+} // namespace anon
+
+
+/****** ThumbnailWidget ******/
+
+ThumbnailWidget::ThumbnailWidget(MarkListWidget* _parent, const PageNumber& _pageNumber, DocumentPageCache* _pageCache)
+  : QWidget(_parent), pageNumber(_pageNumber), pageCache(_pageCache), parent(_parent)
+{
+  setBackgroundMode(Qt::NoBackground);
+
+  needsUpdating = true;
+
+  if (!waitIcon)
+  {
+    waitIcon = new QPixmap(KGlobal::iconLoader()->loadIcon("gear", KIcon::NoGroup, KIcon::SizeMedium));
+  }
+}
+
+void ThumbnailWidget::paintEvent(QPaintEvent* e)
+{
+  // Only repaint if the widget is really visible. We need to check this because Qt
+  // sends paintEvents to all widgets that have ever been visible in the Scrollview
+  // whenever the ScrollView is resized. This also increases the percieved performance
+  // only thumbnails that are really needed are rendered.
+  if (!parent->isVisible())
+  {
+    //kdDebug() << "Abort Thumbnail drawing for page " << pageNumber << endl;
+    return;
+  }
+
+  QPainter p(this);
+  p.setClipRect(e->rect());
+
+  // Paint a black border around the widget
+  p.setRasterOp(Qt::CopyROP);
+  p.setBrush(NoBrush);
+  p.setPen(Qt::black);
+  p.drawRect(rect());
+
+  // Remove 1 pixel from all sides of the rectangle, to eliminate overdraw with
+  // the black border.
+  QRect thumbRect = rect();
+  thumbRect.addCoords(1,1,-1,-1);
+
+  // If the thumbnail is empty or has been marked for updating generate a new thumbnail.
+  if (thumbnail.isNull() || needsUpdating)
+  {
+    if (KVSPrefs::changeColors() && KVSPrefs::renderMode() == KVSPrefs::EnumRenderMode::Paper)
+      p.fillRect(thumbRect, KVSPrefs::paperColor());
+    else
+      p.fillRect(thumbRect, Qt::white);
+
+    // Draw busy indicator.
+    // Im not really sure if this is a good idea.
+    // While it is nice to see an indication that something is happening for pages which
+    // take long to redraw, it gets quite annoing for fast redraws.
+    // TODO: Disable or find something less distractiong.
+    p.drawPixmap(10, 10, *waitIcon);
+
+    QTimer::singleShot(50, this, SLOT(setThumbnail()));
+    return;
+  }
+
+  // Safety check
+  if (thumbnail.isNull())
+  {
+    kdDebug(1223) << "No Thumbnail for page " << pageNumber << " created." << endl;
+    return;
+  }
+
+
+  // The actual page starts at point (1,1) because of the outline.
+  // Therefore we need to shift the destination rectangle.
+  QRect pixmapRect = thumbRect;
+  pixmapRect.moveBy(-1,-1);
+
+  // Paint widget
+  bitBlt (this, thumbRect.topLeft(), &thumbnail, pixmapRect, CopyROP);
+}
+
+void ThumbnailWidget::resizeEvent(QResizeEvent*)
+{
+  thumbnail.resize(width(), height());
+  // Generate a new thumbnail in the next paintEvent.
+  needsUpdating = true;
+}
+
+void ThumbnailWidget::setThumbnail()
+{
+  if (!parent->isVisible())
+  {
+    // We only want to calculate the thumbnail for widgets that are currently visible.
+    // When we are fast scrolling thru the document. Many paint events are created, that
+    // are often not needed anymore at the time the eventloop executes them.
+    //kdDebug() << "Delayed request Abort Thumbnail drawing for page " << pageNumber << endl;
+    kapp->processEvents();
+    return;
+  }
+
+  needsUpdating = false;
+
+  // Draw Thumbnail
+  thumbnail = pageCache->createThumbnail(pageNumber, width() - 2);
+
+  if (thumbnail.height() != height() + 2)
+    setFixedHeight(thumbnail.height() + 2);
+
+  update();
+  kapp->processEvents();
+}
+
+
+/****** MarkListWidget ******/
+
+
+MarkListWidget::MarkListWidget(QWidget* _parent, MarkList* _markList, const PageNumber& _pageNumber,
+                               DocumentPageCache* _pageCache, bool _showThumbnail)
+  : QWidget(_parent), showThumbnail(_showThumbnail), pageNumber(_pageNumber),
+    pageCache(_pageCache), markList(_markList)
+{
+  QBoxLayout* layout = new QVBoxLayout(this, margin);
+
+  thumbnailWidget = 0;
+  if (showThumbnail)
+  {
+    thumbnailWidget = new ThumbnailWidget(this, pageNumber, pageCache);
+    layout->addWidget(thumbnailWidget, 1, Qt::AlignTop);
+  }
+
+  QBoxLayout* bottomLayout = new QHBoxLayout(layout);
+
+  checkBox = new QCheckBox(QString::null, this );
+  checkBox->setFocusPolicy(QWidget::NoFocus);
+  QToolTip::add(checkBox, i18n("Select for printing"));
+  bottomLayout->addWidget(checkBox, 0, Qt::AlignAuto);
+
+  pageLabel = new QLabel(QString("%1").arg(pageNumber), this);
+  bottomLayout->addWidget(pageLabel, 1);
+
+  _backgroundColor = KGlobalSettings::baseColor();
+
+  // Alternate between colors.
+  if ((pageNumber % 2 == 0) && KGlobalSettings::alternateBackgroundColor().isValid())
+    _backgroundColor = KGlobalSettings::alternateBackgroundColor();
+
+  setPaletteBackgroundColor( _backgroundColor );
+
+  show();
+}
+
+bool MarkListWidget::isChecked() const
+{
+    return checkBox->isChecked();
+}
+
+void MarkListWidget::toggle()
+{
+    checkBox->toggle();
+}
+
+void MarkListWidget::setChecked( bool checked )
+{
+    checkBox->setChecked(checked);
+}
+
+void MarkListWidget::setSelected( bool selected )
+{
+    if (selected)
+      setPaletteBackgroundColor( QApplication::palette().active().highlight() );
+    else
+      setPaletteBackgroundColor( _backgroundColor );
+}
+
+int MarkListWidget::setNewWidth(int width)
+{
+  int height = QMAX(checkBox->height(), pageLabel->height()) + 2*margin;
+  if (showThumbnail)
+  {
+    // Calculate size of Thumbnail
+    int thumbnailWidth = QMIN(width, KVSPrefs::maxThumbnailWidth());
+    int thumbnailHeight = (int)((thumbnailWidth - 2*margin - 2) / pageCache->sizeOfPage(pageNumber).aspectRatio() + 0.5) + 2;
+
+    // Resize Thumbnail if necessary
+    if (thumbnailWidget->size() != QSize(thumbnailWidth, thumbnailHeight))
+      thumbnailWidget->setFixedSize(thumbnailWidth - 2*margin, thumbnailHeight);
+
+    height += thumbnailHeight + 2*margin;
+  }
+
+  setFixedSize(width, height);
+  return height;
+}
+
+bool MarkListWidget::isVisible()
+{
+  QRect visibleRect(markList->contentsX(), markList->contentsY(),
+                   markList->visibleWidth(), markList->visibleHeight());
+  QRect widgetRect(markList->childX(this), markList->childY(this), width(), height());
+
+  if (widgetRect.intersects(visibleRect))
+    return true;
+
+  return false;
+}
+
+
+void MarkListWidget::mousePressEvent(QMouseEvent* e)
+{
+  // Select Page
+  if (e->button() == LeftButton)
+  {
+    emit selected(pageNumber);
+  }
+  else if (e->button() == RightButton)
+  {
+    emit showPopupMenu(pageNumber, e->globalPos());
+  }
+}
+
+
+/****** MarkList ******/
+
+
+MarkList::MarkList(QWidget* parent, const char* name)
+  : QScrollView(parent, name), clickedThumbnail(0), showThumbnails(true), contextMenu(0)
+{
+  currentPage = PageNumber::invalidPage;
+  widgetList.setAutoDelete(true);
+  setFocusPolicy( QWidget::StrongFocus );
+  //viewport()->setFocusPolicy( QWidget::WheelFocus );
+  setResizePolicy(QScrollView::Manual);
+
+  setVScrollBarMode(QScrollView::AlwaysOn);
+  setHScrollBarMode(QScrollView::AlwaysOff);
+
+  setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
+
+  viewport()->setBackgroundMode(Qt::PaletteBase);
+  enableClipper(true);
+}
+
+MarkList::~MarkList()
+{
+  delete contextMenu;
+}
+
+void MarkList::setPageCache(DocumentPageCache* _pageCache)
+{
+  pageCache = _pageCache;
+}
+
+QValueList<int> MarkList::selectedPages() const
+{
+  QValueList<int> list;
+  MarkListWidget* item;
+  for(unsigned int i = 0; i < widgetList.count(); i++)
+  {
+    item = widgetList[i];
+    if (item->isChecked()) 
+        list << (i + 1);
+  }
+  return list;
+}
+
+void MarkList::setNumberOfPages(int numberOfPages, bool _showThumbnails)
+{
+  showThumbnails = _showThumbnails;
+
+  widgetList.resize(numberOfPages);
+
+  int y = 0;
+
+  for (int page = 1; page <= numberOfPages; page++)
+  {
+    MarkListWidget* item = new MarkListWidget(viewport(), this, page, pageCache, showThumbnails);
+
+    connect(item, SIGNAL(selected(const PageNumber&)), this, SLOT(thumbnailSelected(const PageNumber&)));
+    connect(item, SIGNAL(showPopupMenu(const PageNumber&, const QPoint&)), this, SLOT(showPopupMenu(const PageNumber&, const QPoint&)));
+
+    widgetList.insert(page - 1, item);
+
+    int height = item->setNewWidth(visibleWidth());
+    addChild(item, 0, y);
+
+    y += height;
+  }
+  resizeContents(visibleWidth(), y);
+  viewport()->update();
+}
+
+void MarkList::thumbnailSelected(const PageNumber& pageNumber)
+{
+  // This variable is set to remember that the next call to setCurrentPageNumber
+  // has been initiated with a left click on the thumbnail of page pageNumber.
+  clickedThumbnail = pageNumber;
+  emit selected(pageNumber);
+}
+
+void MarkList::setCurrentPageNumber(const PageNumber& pageNumber)
+{
+  if (!pageNumber.isValid() || pageNumber > (int)widgetList.count())
+  {
+    clickedThumbnail = 0;
+    return;
+  }
+
+  if (currentPage == pageNumber)
+    return;
+
+  MarkListWidget* item;
+
+  // Clear old selection
+  if (currentPage.isValid() && currentPage <= (int)widgetList.count())
+  {
+    item = widgetList[currentPage - 1];
+    item->setSelected(false);
+  }
+
+  // Draw new selection
+  item = widgetList[pageNumber - 1];
+  item->setSelected(true);
+
+  // Make selected page visible if the current page has not been set with a mouseclick
+  // in the thumbnail list. (We use this because it is a bit confusing if the element that
+  // you have just clicked on, is scrolled away under the mouse cursor)
+  if (clickedThumbnail != pageNumber)
+    ensureVisible(childX(item), childY(item), 0, item->height());
+
+  clickedThumbnail = 0;
+
+  currentPage = pageNumber;
+}
+
+void MarkList::clear()
+{
+  currentPage = PageNumber::invalidPage;
+  widgetList.resize(0);
+}
+
+void MarkList::selectAll()
+{
+  MarkListWidget* item;
+  for (unsigned int i = 0; i < widgetList.count(); i++)
+  {
+    item = widgetList[i];
+    item->setChecked(true);
+  }
+}
+
+void MarkList::selectEven()
+{
+  MarkListWidget* item;
+  for (unsigned int i = 1; i < widgetList.count(); i = i + 2)
+  {
+    item = widgetList[i];
+    item->setChecked(true);
+  }
+}
+
+void MarkList::selectOdd()
+{
+  MarkListWidget* item;
+  for (unsigned int i = 0; i < widgetList.count(); i = i + 2)
+  {
+    item = widgetList[i];
+    item->setChecked(true);
+  }
+}
+
+void MarkList::toggleSelection()
+{
+  MarkListWidget* item;
+  for (unsigned int i = 0; i < widgetList.count(); i++)
+  {
+    item = widgetList[i];
+    item->toggle();
+  }
+}
+
+void MarkList::removeSelection()
+{
+  MarkListWidget* item;
+  for (unsigned int i = 0; i < widgetList.count(); i++)
+  {
+    item = widgetList[i];
+    item->setChecked(false);
+  }
+}
+
+void MarkList::viewportResizeEvent(QResizeEvent*)
+{
+  MarkListWidget* item;
+
+  int yold = contentsHeight();
+  int y = 0;
+
+  for (unsigned int i = 0; i < widgetList.count(); i++)
+  {
+    item = widgetList[i];
+    int height = item->setNewWidth(visibleWidth());
+    moveChild(item, 0, y);
+
+    y += height;
+  }
+  resizeContents(visibleWidth(), y);
+
+  // If the height of the content has changed
+  if (yold != contentsHeight())
+  {
+    // Make sure the selected item is still visible.
+    if (currentPage.isValid() && currentPage <= (int)widgetList.count())
+    {
+      item = widgetList[currentPage-1];
+      ensureVisible(childX(item), childY(item), 0, item->height());
+    }
+  }
+
+  viewport()->update();
+}
+
+
+void MarkList::updateWidgetSize(const PageNumber& pageNumber)
+{
+  // safety checks
+  if (!pageNumber.isValid() || pageNumber > widgetList.count())
+  {
+    kdError() << "MarkList::updateWidgetSize called with invalid pageNumber " << pageNumber << endl;
+    return;
+  }
+
+  MarkListWidget* item;
+
+  // Resize the changed widget
+  item = widgetList[pageNumber - 1];
+  int height = item->setNewWidth(visibleWidth());
+  int y = childY(item) + height;
+
+  // Move the rest of the widgets
+  for (unsigned int i = pageNumber; i < widgetList.count(); i++)
+  {
+    item = widgetList[i];
+    int height = item->height();
+    moveChild(item, 0, y);
+
+    y += height;
+  }
+  resizeContents(contentsWidth(), y);
+
+  viewport()->update();
+}
+
+void MarkList::mousePressEvent(QMouseEvent* e)
+{
+  if (e->button() == RightButton)
+  {
+    // We call showPopupMenu with an invalid pageNumber to indicate that
+    // the mouse does not point at a thumbnailWidget.
+    showPopupMenu(PageNumber::invalidPage, e->globalPos());
+  }
+}
+
+void MarkList::slotShowThumbnails(bool show)
+{
+  if (show != showThumbnails)
+  {
+    int numOfPages = widgetList.count();
+
+    if (numOfPages == 0)
+      return;
+
+    // Save current page.
+    PageNumber _currentPage = currentPage;
+
+    // Save page selections.
+    QValueVector<bool> selections;
+    selections.resize(widgetList.count());
+    for (unsigned int i = 0; i < widgetList.count(); i++)
+      selections[i] = widgetList[i]->isChecked();
+
+    // Rebuild thumbnail widgets.
+    clear();
+    setNumberOfPages(numOfPages, show);
+
+    // Restore current page.
+    setCurrentPageNumber(_currentPage);
+
+    // Restore page selections
+    for (unsigned int i = 0; i < widgetList.count(); i++)
+      widgetList[i]->setChecked(selections[i]);
+  }
+}
+
+
+void MarkList::repaintThumbnails()
+{
+  bool show = showThumbnails;
+  int numOfPages = widgetList.count();
+
+  // Rebuild thumbnail widgets.
+  clear();
+  setNumberOfPages(numOfPages, show);
+}
+
+
+void MarkList::showPopupMenu(const PageNumber& pageNumber, const QPoint& position)
+{
+  if (contextMenu == 0)
+  {
+    // Initialize Contextmenu
+    contextMenu = new KPopupMenu(this, "markListContext");
+
+    contextMenu->insertItem(i18n("Select &Current Page"), 0);
+    contextMenu->insertItem(i18n("Select &All Pages"), 1);
+    contextMenu->insertItem(i18n("Select &Even Pages"), 2);
+    contextMenu->insertItem(i18n("Select &Odd Pages"), 3);
+    contextMenu->insertItem(i18n("&Invert Selection"), 4);
+    contextMenu->insertItem(i18n("&Deselect All Pages"), 5);
+  }
+
+  if (widgetList.count() == 0)
+  {
+    for (int i = 0; i <= 5; i++)
+      contextMenu->setItemEnabled(i, false);
+  }
+  else
+  {
+    for (int i = 0; i <= 5; i++)
+      contextMenu->setItemEnabled(i, true);
+  }
+
+  // Only allow to select the current page if we got a valid pageNumber.
+  if (pageNumber.isValid() && pageNumber <= (int)widgetList.count())
+    contextMenu->setItemEnabled(0, true);
+  else
+    contextMenu->setItemEnabled(0, false);
+
+  // Show Contextmenu
+  switch(contextMenu->exec(position))
+  {
+    case 0:
+      widgetList[pageNumber - 1]->toggle();
+      break;
+
+    case 1:
+      selectAll();
+      break;
+
+    case 2:
+      selectEven();
+      break;
+
+    case 3:
+      selectOdd();
+      break;
+
+    case 4:
+      toggleSelection();
+      break;
+
+    case 5:
+      removeSelection();
+      break;
+  }
+}
+