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, 204 insertions, 0 deletions

diff --git a/kfaxview/faxrenderer.cpp b/kfaxview/faxrenderer.cpp
new file mode 100644
index 00000000..ec18d431
--- /dev/null
+++ b/kfaxview/faxrenderer.cpp
@@ -0,0 +1,204 @@
+/***************************************************************************
+ *   Copyright (C) 2005 by Stefan Kebekus                                  *
+ *   [email protected]                                                       *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program 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 program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.             *
+ ***************************************************************************/
+
+#include <config.h>
+
+#include <kmessagebox.h>
+#include <kdebug.h>
+#include <klocale.h>
+#include <qfileinfo.h>
+#include <qpainter.h>
+
+#include "documentWidget.h"
+#include "faxrenderer.h"
+#include "faxmultipage.h"
+
+//#define KF_DEBUG
+
+FaxRenderer::FaxRenderer(QWidget* par)
+  : DocumentRenderer(par)
+{
+#ifdef KF_DEBUG
+  kdError() << "FaxRenderer( parent=" << par << " )" << endl;
+#endif
+}
+
+
+
+FaxRenderer::~FaxRenderer()
+{
+#ifdef KF_DEBUG
+  kdDebug() << "~FaxRenderer" << endl;
+#endif
+
+  // Wait for all access to this documentRenderer to finish
+  mutex.lock();
+  mutex.unlock();
+}
+
+
+void FaxRenderer::drawPage(double resolution, RenderedDocumentPage* page)
+{
+#ifdef KF_DEBUG
+  kdDebug() << "FaxRenderer::drawPage(documentPage*) called, page number " << page->getPageNumber() << endl;
+#endif
+
+  // Paranoid safety checks
+  if (page == 0) {
+    kdError() << "FaxRenderer::drawPage(documentPage*) called with argument == 0" << endl;
+    return;
+  }
+  if (page->getPageNumber() == 0) {
+    kdError() << "FaxRenderer::drawPage(documentPage*) called for a documentPage with page number 0" << endl;
+    return;
+  }
+
+  // Wait for all access to this documentRenderer to finish
+  mutex.lock();
+
+  // more paranoid safety checks
+  if (page->getPageNumber() > numPages) {
+    kdError() << "FaxRenderer::drawPage(documentPage*) called for a documentPage with page number " << page->getPageNumber()
+	      << " but the current fax file has only " << numPages << " pages." << endl;
+    mutex.unlock();
+    return;
+  }
+
+  QImage img = fax.page(page->getPageNumber() - 1);
+
+  SimplePageSize psize = pageSizes[page->getPageNumber() - 1];
+  if (psize.isValid()) {
+    QPainter *foreGroundPaint = page->getPainter();
+    if (foreGroundPaint != 0) {
+      // Compute an image for the page.
+
+      // WARNING: It may be tempting to compute the image size in
+      // pixel, using page->height() and page->width(). DON'T DO
+      // THAT. KViewShell uses transformations e.g. to rotate the
+      // page, and sets the argument 'resolution' accordingly. Similar
+      // problems occur if KViewShell required a shrunken version of
+      // the page, e.g. to print multiple pages on one sheet of paper.
+
+      int width_in_pixel = qRound(resolution * psize.width().getLength_in_inch());
+      int height_in_pixel = qRound(resolution * psize.height().getLength_in_inch());
+
+      img = img.smoothScale(width_in_pixel, height_in_pixel);
+      foreGroundPaint->drawImage(0, 0, img);
+      page->returnPainter(foreGroundPaint);
+    }
+  } else
+    kdError() << "FaxRenderer::drawPage() called, but page size for page " << page->getPageNumber() << " is invalid." << endl;
+  
+  // To indicate that the page was drawn, we set the appropriate flas in the page structure
+  page->isEmpty = false;
+  
+  mutex.unlock();
+}
+
+
+bool FaxRenderer::setFile(const QString &fname, const KURL &)
+{
+#ifdef KF_DEBUG
+  kdDebug() << "FaxRenderer::setFile(" << fname << ") called" << endl;
+#endif
+  
+  // Wait for all access to this documentRenderer to finish
+  mutex.lock();
+  
+  // If fname is the empty string, then this means: "close".
+  if (fname.isEmpty()) {
+    kdDebug() << "FaxRenderer::setFile( ... ) called with empty filename. Closing the file." << endl;
+    mutex.unlock();
+    return true;
+  }
+  
+  // Paranoid saftey checks: make sure the file actually exists, and
+  // that it is a file, not a directory. Otherwise, show an error
+  // message and exit..
+  QFileInfo fi(fname);
+  QString   filename = fi.absFilePath();
+  if (!fi.exists() || fi.isDir()) {
+    KMessageBox::error( parentWidget,
+			i18n("<qt><strong>File error.</strong> The specified file '%1' does not exist.</qt>").arg(filename),
+			i18n("File Error"));
+    // the return value 'false' indicates that this operation was not successful.
+    mutex.unlock();
+    return false;
+  }
+
+  // Now we assume that the file is fine and load the file into the
+  // fax member. We abort on error and give an error message.
+  bool ok = fax.loadImage(filename);
+
+  // It can happen that fax.loadImage() returns with 'ok == true', but
+  // still the file could NOT be loaded. This happens, e.g. for TIFF
+  // file that do NOT contain FAX, but other image formats. We handle
+  // that case here also.
+  if ( (!ok) || (fax.numPages() == 0)) {
+    // Unfortunately, it can happen that fax.loadImage() fails WITHOUT
+    // leaving an error message in fax.errorString(). We try to handle
+    // this case gracefully.
+    if (fax.errorString().isEmpty())
+      KMessageBox::error( parentWidget,
+			  i18n("<qt><strong>File error.</strong> The specified file '%1' could not be loaded.</qt>").arg(filename),
+			  i18n("File Error"));
+    else
+      KMessageBox::detailedError( parentWidget,
+				  i18n("<qt><strong>File error.</strong> The specified file '%1' could not be loaded.</qt>").arg(filename),
+				  fax.errorString(),
+				  i18n("File Error"));
+    clear();
+    mutex.unlock();
+    return false;
+  }
+
+  // Set the number of pages page sizes
+  numPages = fax.numPages();
+
+  // Set the page size for the first page in the pageSizes array.
+  // The rest of the page sizes will be calculated on demand by the drawPage function.
+  pageSizes.resize(numPages);
+  Length w,h;
+
+  if (numPages != 0) {
+    for(Q_UINT16 pg=0; pg < numPages; pg++) {
+      QSize pageSize = fax.page_size(pg);
+      QPoint dpi = fax.page_dpi(pg);
+      double dpix = dpi.x();
+      double dpiy = dpi.y();
+
+      if (dpix*dpiy < 1.0) {
+        kdError() << "File invalid resolutions, dpi x = " << dpix << ", dpi y = "  << dpiy << ". This information will be ignored and 75 DPI assumed." << endl;
+        dpix = dpiy = 75.0;
+      }
+
+      w.setLength_in_inch(pageSize.width() / dpix);
+      h.setLength_in_inch(pageSize.height() / dpiy);
+      pageSizes[pg].setPageSize(w, h);
+    }
+  }
+
+  // the return value 'true' indicates that this operation was not successful.
+  mutex.unlock();
+  return true;
+}
+
+
+#include "faxrenderer.moc"