Use signals to propagate notifications in dviexport and psgs

Change KMessageBox into notifications (PageViewMessage).

REVIEW: 115925

generators/dvi/dviRenderer.cpp

@@ -77,6 +77,7 @@ dviRenderer::dviRenderer(bool useFontHinting)
 //  connect( &clearStatusBarTimer, SIGNAL(timeout()), this, SLOT(clearStatusBar()) );
   // pass status bar messages through
 //  connect(PS_interface, SIGNAL(setStatusBarText(QString)), this, SIGNAL(setStatusBarText(QString)) );
+  connect( PS_interface, SIGNAL( error(QString,int) ), this, SIGNAL( error(QString,int) ) );
 }
 
 

generators/dvi/dviRenderer.h

@@ -145,6 +145,17 @@ public:
   void          export_finished(const DVIExport*);
 //void          editor_finished(const DVISourceEditor*);
 
+
+Q_SIGNALS:
+  /**
+   * The following three signals are modeleed on the corresponding signals
+   * of the Document class.
+   */
+  void error( const QString &message, int duration );
+  void warning( const QString &message, int duration );
+  void notice( const QString &message, int duration );
+
+
 public slots:
   void          exportPS(const QString& fname = QString(), const QStringList& options = QStringList(), QPrinter* printer = 0, QPrinter::Orientation orientation = QPrinter::Portrait);
   void          exportPDF();

generators/dvi/dviexport.cpp

@@ -47,7 +47,9 @@ DVIExport::DVIExport(dviRenderer& parent, QWidget* parent_widget)
     progress_(0),
     parent_(&parent),
     parent_widget_(parent_widget)
-{}
+{
+  connect( this, SIGNAL(error(QString,int)), &parent, SIGNAL(error(QString,int)) );
+}
 
 
 DVIExport::~DVIExport()
@@ -138,7 +140,7 @@ void DVIExport::finished_impl(int exit_code)
   }
 
   if (process_ && exit_code != 0)
-    KMessageBox::error(parent_widget_, error_message_);
+    emit error(error_message_, -1);
   // Remove this from the store of all export processes.
   parent_->m_eventLoop->exit( exit_code );
   parent_->export_finished(this);
@@ -169,15 +171,14 @@ DVIExportToPDF::DVIExportToPDF(dviRenderer& parent, QWidget* parent_widget)
     return;
 
   if (KStandardDirs::findExe("dvipdfm").isEmpty()) {
-    KMessageBox::sorry(parent_widget,
-                               i18n("Okular could not locate the program 'dvipdfm' on your computer. This program is "
-                               "essential for the export function to work. You can, however, convert "
-                               "the DVI-file to PDF using the print function of Okular, but that will often "
-                               "produce documents which print okay, but are of inferior quality if viewed in "
-                               "Acrobat Reader. It may be wise to upgrade to a more recent version of your "
-                               "TeX distribution which includes the 'dvipdfm' program.\n"
-                               "Hint to the perplexed system administrator: Okular uses the PATH environment variable "
-                               "when looking for programs."));
+    emit error(i18n("Okular could not locate the program 'dvipdfm' on your computer. This program is "
+                    "essential for the export function to work. You can, however, convert "
+                    "the DVI-file to PDF using the print function of Okular, but that will often "
+                    "produce documents which print okay, but are of inferior quality if viewed in "
+                    "Acrobat Reader. It may be wise to upgrade to a more recent version of your "
+                    "TeX distribution which includes the 'dvipdfm' program.\n"
+                    "Hint to the perplexed system administrator: Okular uses the PATH environment variable "
+                    "when looking for programs."), -1);
     return;
   }
 
@@ -241,23 +242,17 @@ DVIExportToPS::DVIExportToPS(dviRenderer& parent,
     return;
 
   if (dvi.numberOfExternalNONPSFiles != 0) {
-    KMessageBox::sorry(parent_widget,
-                       i18n("<qt><P>This DVI file refers to external graphic files which are not in PostScript format, and cannot be handled by the "
-                            "<strong>dvips</strong> program that Okular uses internally to print or to export to PostScript. The functionality that "
-                            "you require is therefore unavailable in this version of Okular.</p>"
-                            "<p>As a workaround, you can use the <strong>File/Export As</strong>-Menu to save this file in PDF format, and then use "
-                            "a PDF viewer.</p>"
-                            "<p>It is planned to add this functionality at a later date.</p></qt>") ,
-                       i18n("Functionality Unavailable"));
+    emit error(i18n("This DVI file refers to external graphic files which are not in PostScript format, and cannot be handled by the "
+                    "'dvips' program that Okular uses internally to print or to export to PostScript. The functionality that "
+                    "you require is therefore unavailable in this version of Okular."), -1);
     return;
   }
 
   if (KStandardDirs::findExe("dvips").isEmpty()) {
-    KMessageBox::sorry(parent_widget,
-                          i18n("Okular could not locate the program 'dvips' on your computer. That program is "
-                               "essential for the export function to work.\n"
-                               "Hint to the perplexed system administrator: Okular uses the PATH environment variable "
-                               "when looking for programs."));
+    emit error(i18n("Okular could not locate the program 'dvips' on your computer. That program is "
+                    "essential for the export function to work.\n"
+                    "Hint to the perplexed system administrator: Okular uses the PATH environment variable "
+                    "when looking for programs."), -1);
     return;
   }
 

generators/dvi/dviexport.h

@@ -45,6 +45,9 @@ public:
    */
   bool started() const { return started_; }
 
+Q_SIGNALS:
+  void error( const QString &message, int duration );
+
 protected:
   /** @param parent is stored internally in order to inform the parent
    *  that the external process has finished and that this variable

generators/dvi/generator_dvi.cpp

@@ -81,6 +81,9 @@ bool DviGenerator::loadDocument( const QString & fileName, QVector< Okular::Page
     (void)userMutex();
 
     m_dviRenderer = new dviRenderer(documentMetaData("TextHinting", QVariant()).toBool());
+    connect( m_dviRenderer, SIGNAL( error(QString,int) ), this, SIGNAL( error(QString,int) ) );
+    connect( m_dviRenderer, SIGNAL( warning(QString,int) ), this, SIGNAL( warning(QString,int) ) );
+    connect( m_dviRenderer, SIGNAL( notice(QString,int) ), this, SIGNAL( notice(QString,int) ) );
 #ifdef DVI_OPEN_BUSYLOOP
     static const ushort s_waitTime = 800; // milliseconds
     static const int s_maxIterations = 10;

generators/dvi/psgs.cpp

@@ -16,7 +16,6 @@
 #include "pageNumber.h"
 
 #include <klocale.h>
-#include <kmessagebox.h>
 #include <kprocess.h>
 #include <ktemporaryfile.h>
 #include <kurl.h>
@@ -261,11 +260,10 @@ void ghostscript_interface::gs_generate_graphics_file(const PageNumber& page, co
 	gsDevice = knownDevices.begin();
 	if (knownDevices.isEmpty())
 	  // TODO: show a requestor of some sort.
+	  emit error(i18n("The version of Ghostview that is installed on this computer does not contain "
+			  "any of the Ghostview device drivers that are known to Okular. PostScript "
+			  "support has therefore been turned off in Okular."), -1);
 #if 0
-	  KMessageBox::detailedError(0, 
-				     i18n("<qt>The version of Ghostview that is installed on this computer does not contain "
-					  "any of the Ghostview device drivers that are known to Okular. PostScript "
-					  "support has therefore been turned off in Okular.</qt>"), 
 				     i18n("<qt><p>The Ghostview program, which Okular uses internally to display the "
 					  "PostScript graphics that is included in this DVI file, is generally able to "
 					  "write its output in a variety of formats. The sub-programs that Ghostview uses "
@@ -282,8 +280,6 @@ void ghostscript_interface::gs_generate_graphics_file(const PageNumber& page, co
 					  "Ghostview. Among others, Okular can use the 'png256', 'jpeg' and 'pnm' "
 					  "drivers. Note that Okular needs to be restarted to re-enable PostScript support."
 					  "</p></qt>"));
-#else
-	{}
 #endif
 	else {
 	  kDebug(kvs::dvi) << QString("Okular will now try to use the '%1' device driver.").arg(*gsDevice);

generators/dvi/psgs.h

@@ -104,6 +104,7 @@ private:
 signals:
   /** Passed through to the top-level kpart. */
   void setStatusBarText( const QString& );
+  void error( const QString &message, int duration );
 };
 
 #endif