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205 lines
7.2 KiB
205 lines
7.2 KiB
/***************************************************************************
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* Copyright (C) 2005 by Stefan Kebekus *
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* kebekus@kde.org *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include <config.h>
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#include <kmessagebox.h>
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#include <kdebug.h>
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#include <klocale.h>
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#include <tqfileinfo.h>
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#include <tqpainter.h>
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#include "documentWidget.h"
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#include "faxrenderer.h"
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#include "faxmultipage.h"
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//#define KF_DEBUG
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FaxRenderer::FaxRenderer(TQWidget* par)
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: DocumentRenderer(par)
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{
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#ifdef KF_DEBUG
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kdError() << "FaxRenderer( parent=" << par << " )" << endl;
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#endif
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}
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FaxRenderer::~FaxRenderer()
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{
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#ifdef KF_DEBUG
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kdDebug() << "~FaxRenderer" << endl;
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#endif
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// Wait for all access to this documentRenderer to finish
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mutex.lock();
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mutex.unlock();
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}
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void FaxRenderer::drawPage(double resolution, RenderedDocumentPage* page)
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{
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#ifdef KF_DEBUG
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kdDebug() << "FaxRenderer::drawPage(documentPage*) called, page number " << page->getPageNumber() << endl;
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#endif
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// Paranoid safety checks
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if (page == 0) {
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kdError() << "FaxRenderer::drawPage(documentPage*) called with argument == 0" << endl;
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return;
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}
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if (page->getPageNumber() == 0) {
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kdError() << "FaxRenderer::drawPage(documentPage*) called for a documentPage with page number 0" << endl;
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return;
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}
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// Wait for all access to this documentRenderer to finish
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mutex.lock();
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// more paranoid safety checks
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if (page->getPageNumber() > numPages) {
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kdError() << "FaxRenderer::drawPage(documentPage*) called for a documentPage with page number " << page->getPageNumber()
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<< " but the current fax file has only " << numPages << " pages." << endl;
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mutex.unlock();
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return;
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}
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TQImage img = fax.page(page->getPageNumber() - 1);
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SimplePageSize psize = pageSizes[page->getPageNumber() - 1];
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if (psize.isValid()) {
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TQPainter *foreGroundPaint = page->getPainter();
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if (foreGroundPaint != 0) {
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// Compute an image for the page.
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// WARNING: It may be tempting to compute the image size in
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// pixel, using page->height() and page->width(). DON'T DO
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// THAT. KViewShell uses transformations e.g. to rotate the
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// page, and sets the argument 'resolution' accordingly. Similar
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// problems occur if KViewShell required a shrunken version of
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// the page, e.g. to print multiple pages on one sheet of paper.
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int width_in_pixel = tqRound(resolution * psize.width().getLength_in_inch());
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int height_in_pixel = tqRound(resolution * psize.height().getLength_in_inch());
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img = img.smoothScale(width_in_pixel, height_in_pixel);
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foreGroundPaint->drawImage(0, 0, img);
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page->returnPainter(foreGroundPaint);
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}
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} else
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kdError() << "FaxRenderer::drawPage() called, but page size for page " << page->getPageNumber() << " is invalid." << endl;
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// To indicate that the page was drawn, we set the appropriate flas in the page structure
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page->isEmpty = false;
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mutex.unlock();
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}
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bool FaxRenderer::setFile(const TQString &fname, const KURL &)
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{
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#ifdef KF_DEBUG
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kdDebug() << "FaxRenderer::setFile(" << fname << ") called" << endl;
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#endif
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// Wait for all access to this documentRenderer to finish
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mutex.lock();
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// If fname is the empty string, then this means: "close".
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if (fname.isEmpty()) {
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kdDebug() << "FaxRenderer::setFile( ... ) called with empty filename. Closing the file." << endl;
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mutex.unlock();
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return true;
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}
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// Paranoid saftey checks: make sure the file actually exists, and
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// that it is a file, not a directory. Otherwise, show an error
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// message and exit..
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TQFileInfo fi(fname);
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TQString filename = fi.absFilePath();
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if (!fi.exists() || fi.isDir()) {
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KMessageBox::error( parentWidget,
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i18n("<qt><strong>File error.</strong> The specified file '%1' does not exist.</qt>").arg(filename),
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i18n("File Error"));
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// the return value 'false' indicates that this operation was not successful.
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mutex.unlock();
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return false;
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}
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// Now we assume that the file is fine and load the file into the
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// fax member. We abort on error and give an error message.
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bool ok = fax.loadImage(filename);
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// It can happen that fax.loadImage() returns with 'ok == true', but
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// still the file could NOT be loaded. This happens, e.g. for TIFF
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// file that do NOT contain FAX, but other image formats. We handle
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// that case here also.
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if ( (!ok) || (fax.numPages() == 0)) {
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// Unfortunately, it can happen that fax.loadImage() fails WITHOUT
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// leaving an error message in fax.errorString(). We try to handle
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// this case gracefully.
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if (fax.errorString().isEmpty())
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KMessageBox::error( parentWidget,
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i18n("<qt><strong>File error.</strong> The specified file '%1' could not be loaded.</qt>").arg(filename),
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i18n("File Error"));
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else
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KMessageBox::detailedError( parentWidget,
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i18n("<qt><strong>File error.</strong> The specified file '%1' could not be loaded.</qt>").arg(filename),
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fax.errorString(),
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i18n("File Error"));
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clear();
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mutex.unlock();
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return false;
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}
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// Set the number of pages page sizes
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numPages = fax.numPages();
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// Set the page size for the first page in the pageSizes array.
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// The rest of the page sizes will be calculated on demand by the drawPage function.
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pageSizes.resize(numPages);
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Length w,h;
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if (numPages != 0) {
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for(TQ_UINT16 pg=0; pg < numPages; pg++) {
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TQSize pageSize = fax.page_size(pg);
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TQPoint dpi = fax.page_dpi(pg);
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double dpix = dpi.x();
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double dpiy = dpi.y();
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if (dpix*dpiy < 1.0) {
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kdError() << "File invalid resolutions, dpi x = " << dpix << ", dpi y = " << dpiy << ". This information will be ignored and 75 DPI assumed." << endl;
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dpix = dpiy = 75.0;
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}
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w.setLength_in_inch(pageSize.width() / dpix);
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h.setLength_in_inch(pageSize.height() / dpiy);
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pageSizes[pg].setPageSize(w, h);
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}
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}
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// the return value 'true' indicates that this operation was not successful.
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mutex.unlock();
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return true;
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}
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#include "faxrenderer.moc"
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