Added KDE3 version of POTraceGUI

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/potracegui@1101754 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 1055 insertions, 0 deletions

diff --git a/src/mainwidget.cpp b/src/mainwidget.cpp
new file mode 100644
index 0000000..6e85ce1
--- /dev/null
+++ b/src/mainwidget.cpp
@@ -0,0 +1,1055 @@
+/***************************************************************************
+ *   Copyright (C) 2004 by Antonio Fasolato                                *
+ *   Antonio.Fasolato@poste.it                                             *
+ *                                                                         *
+ *   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 "mainwidget.h"
+#include "options.h"
+#include "autotraceformats.h"
+
+#include <qcheckbox.h>
+#include <qradiobutton.h>
+#include <qbuffer.h>
+#include <qbuttongroup.h>
+#include <qtabwidget.h>
+#include <qcursor.h>
+#include <qapplication.h>
+#include <qwidgetstack.h>
+#include <qglobal.h>
+
+#include <kurldrag.h>
+#include <kfiledialog.h>
+#include <kimageio.h>
+#include <kio/netaccess.h>
+#include <klocale.h>
+#include <knuminput.h>
+#include <kcombobox.h>
+#include <kcolorbutton.h>
+#include <kpushbutton.h>
+#include <kmessagebox.h>
+
+#include <cstdlib>
+#include <fstream>
+using namespace std;
+
+MainWidget::MainWidget(QWidget* parent, const char* name, WFlags fl): MainWidgetBase(parent,name,fl), m_changed(false) {
+  KImageIO::registerFormats();
+
+  setAcceptDrops(true);
+  
+  /*Scrolled image viewers*/
+  delete imagesTabs->page(0);
+  QScrollView *originalScroll=new QScrollView(this);
+  QScrollView *previewScroll=new QScrollView(this);
+  imagesTabs->addTab(originalScroll,i18n("Original image"));
+  imagesTabs->addTab(previewScroll,i18n("Preview"));
+  originalLabel=new QLabel(this);
+  previewLabel=new QLabel(this);
+  originalLabel->setGeometry(0,0,10,10);
+  previewLabel->setGeometry(0,0,10,10);
+  originalScroll->addChild(originalLabel);
+  previewScroll->addChild(previewLabel);
+
+  /*Load default options*/
+  marginValueSynconizingNecessary=true;
+  Options *o=new Options();
+  o->defaultOptions();
+  m_state.clear();
+  m_oldPreviews.clear();
+  m_state.push_back(o);
+  m_oldPreviews.push_back(QPixmap());
+  m_currentState=m_state.begin();
+  m_currentPreview=m_oldPreviews.begin();
+
+  connect(&tracer,SIGNAL(processExited()),this,SLOT(tracerExited()));
+  connect(&tracer,SIGNAL(wroteToStdin()),this,SLOT(writeCompleted()));
+  connect(traceBtn,SIGNAL(clicked()),this,SLOT(trace()));
+  connect(defaultBtn,SIGNAL(clicked()),this,SLOT(defaultOptions()));
+
+  emit(signalChangeStatusbar(i18n("Checking autotrace formats.")));
+  AutotraceFormats *formats=new AutotraceFormats();
+  if(formats->OK()) {
+	  while(!(formats->done()));  //wait till AutotraceFormats has finished
+	  autotraceOutputFormat->insertStringList(formats->outputFormats());
+	  emit(signalChangeStatusbar(i18n("Done.")));
+  }
+  else {
+	  emit(signalChangeStatusbar(i18n("Autotrace not found.")));
+	  backendCombo->setEnabled(false);
+  }
+  
+  readOptions();
+}
+
+MainWidget::~MainWidget() {
+  if (tracer.isRunning())
+    tracer.tryTerminate();
+  if(m_tmpFilename!="")
+    deleteTmpFilename();
+}
+
+void MainWidget::fileOpen() {
+  KFileDialog d(QString::null,KImageIO::pattern(),this,i18n("Select an image"),true);
+  d.exec();
+
+  if(d.result()==QDialog::Accepted)
+    getImageFromURL(d.selectedURL());
+}
+
+void MainWidget::fileSave() {
+  if(m_outputFilename=="" && m_changed)
+  {
+    QString filter;
+	 if(backendCombo->currentText()=="potrace") {      //potrace formats
+		 if((**m_currentState)["outputFormat"]==i18n("eps"))
+			 filter=i18n("*.eps|Encapsulated postscript");
+    	else if((**m_currentState)["outputFormat"]==i18n("postscript"))
+      	filter=i18n("*.ps|Postscript");
+    	else if((**m_currentState)["outputFormat"]==i18n("SVG"))
+      	filter=i18n("*.svg|SVG images");
+    	else if((**m_currentState)["outputFormat"]==i18n("Gimp path"))
+      	filter=i18n("*.*|Gimp path");
+    	else if((**m_currentState)["outputFormat"]==i18n("Xfig"))
+      	filter=i18n("*.fig|XFig drawing");
+    	else
+      	filter=i18n("*.pgm|PGM image");
+	 }
+	 else {      //autotrace formats
+		 filter="*."+(**m_currentState)["outputFormat"];
+	 }
+    QString saveFilename=KFileDialog::getSaveFileName(QString::null,filter,this,i18n("Select the file to save to"));
+
+    bool salva=false;
+    while(saveFilename!="")
+    {
+      int res;
+      if(QFile::exists(saveFilename))
+        res=KMessageBox::warningYesNo(this, i18n("Overwrite %1 ?").arg(saveFilename));
+      else
+      {
+        salva=true;
+        break;
+      }
+      if(res==KMessageBox::Yes)
+      {
+        salva=true;
+        break;
+      }
+      else
+        saveFilename=KFileDialog::getSaveFileName(QString::null,filter,this,i18n("Select the file to save to"));
+    }
+
+    if(salva)
+    {
+      m_outputFilename=saveFilename;
+      ifstream in(m_tmpFilename);
+      ofstream out(m_outputFilename);
+      if(!in || !out)
+      {
+        emit signalChangeStatusbar(i18n(i18n("Error while saving file")));
+        return;
+      }
+      emit signalChangeStatusbar(i18n("Saving %1...").arg(m_outputFilename));
+      char ch;
+      while(in.get(ch))
+        out.put(ch);
+      in.close();
+      out.close();
+      m_changed=false;
+      emit signalChangeStatusbar(i18n("File %1 saved.").arg(m_outputFilename));
+    }
+    else
+      emit signalChangeStatusbar(i18n("File not saved"));
+  }
+  else if (m_changed)
+  {
+    ifstream in(m_tmpFilename);
+    ofstream out(m_outputFilename);
+    if(!in || !out)
+    {
+      emit signalChangeStatusbar(i18n("Error while saving file"));
+      return;
+    }
+    emit signalChangeStatusbar(i18n("Saving %1...").arg(m_outputFilename));
+    char ch;
+    while(in.get(ch))
+      out.put(ch);
+
+    in.close();
+    out.close();
+    emit signalChangeStatusbar(i18n("File %1 saved.").arg(m_outputFilename));
+    m_changed=false;
+  }
+}
+
+void MainWidget::fileSaveAs() {
+  if(previewLabel->pixmap()!=0 || previewLabel->text()!="")
+  {
+	  QString filter;
+	  if(backendCombo->currentText()=="potrace") {      //potrace formats
+		  if((**m_currentState)["outputFormat"]==i18n("eps"))
+			  filter=i18n("*.eps|Encapsulated postscript");
+		  else if((**m_currentState)["outputFormat"]==i18n("postscript"))
+			  filter=i18n("*.ps|Postscript");
+		  else if((**m_currentState)["outputFormat"]==i18n("SVG"))
+			  filter=i18n("*.svg|SVG images");
+		  else if((**m_currentState)["outputFormat"]==i18n("Gimp path"))
+			  filter=i18n("*.*|Gimp path");
+		  else if((**m_currentState)["outputFormat"]==i18n("Xfig"))
+			  filter=i18n("*.fig|XFig drawing");
+		  else
+			  filter=i18n("*.pgm|PGM image");
+	  }
+	  else {      //autotrace formats
+		  filter="*."+(**m_currentState)["outputFormat"];
+	  }
+	  QString saveFilename=KFileDialog::getSaveFileName(QString::null,filter,this,i18n("Select the file to save to"));
+
+    bool salva=false;
+    while(saveFilename!="")
+    {
+      int res;
+      if(QFile::exists(saveFilename))
+        res=KMessageBox::warningYesNo(this,i18n("Overwrite %1 ?").arg(saveFilename));
+      else
+      {
+        salva=true;
+        break;
+      }
+      if(res==KMessageBox::Yes)
+      {
+        salva=true;
+        break;
+      }
+      else
+        saveFilename=KFileDialog::getSaveFileName(QString::null,filter,this,i18n("Select the file to save to"));
+    }
+
+    if(salva)
+    {
+      m_outputFilename=saveFilename;
+      ifstream in(m_tmpFilename);
+      ofstream out(m_outputFilename);
+      if(!in || !out)
+      {
+        emit signalChangeStatusbar(i18n("Error while saving file"));
+        return;
+      }
+      emit signalChangeStatusbar(i18n("Saving %1...").arg(m_outputFilename));
+      char ch;
+      while(in.get(ch))
+        out.put(ch);
+      in.close();
+      out.close();
+      m_changed=false;
+      emit signalChangeStatusbar(i18n("File %1 saved.").arg(m_outputFilename));
+    }
+    else
+      emit signalChangeStatusbar(i18n("File not saved"));
+  }
+}
+
+void MainWidget::fileClose() {
+  originalLabel->clear();
+  originalLabel->setGeometry(0,0,10,10);
+  previewLabel->clear();
+  previewLabel->setGeometry(0,0,10,10);
+  if(m_tmpFilename!="" && !deleteTmpFilename())
+    emit signalChangeStatusbar(i18n("Warning: could not remove temporary file."));
+  Options *o=new Options();
+  o->defaultOptions();
+  m_state.clear();
+  m_oldPreviews.clear();
+  m_state.push_back(o);
+  m_oldPreviews.push_back(QPixmap());
+  m_currentState=m_state.begin();
+  m_currentPreview=m_oldPreviews.begin();
+  readOptions();
+}
+
+void MainWidget::cut() {
+  if(originalLabel->pixmap()!=0)
+  {
+    QApplication::clipboard()->setPixmap(QPixmap(*(originalLabel->pixmap())));
+    fileClose();
+  }
+}
+
+void MainWidget::copy() {
+  if(originalLabel->pixmap()!=0)
+  {
+    QApplication::clipboard()->setPixmap(QPixmap(*(originalLabel->pixmap())));
+  }
+}
+
+void MainWidget::paste() {
+  QPixmap clip=QApplication::clipboard()->pixmap();
+  if(!clip.isNull())
+  {
+    if(!createTmpFilename())
+    {
+      emit signalChangeStatusbar(i18n("Could not create temporary filename"));
+      return;
+    }
+
+    m_outputFilename="";
+	 QPixmap pix(QApplication::clipboard()->pixmap());
+	 originalLabel->clear();
+	 originalLabel->setGeometry(0,0,pix.width(),pix.height());
+    originalLabel->setPixmap(pix);
+    previewLabel->clear();
+	 previewLabel->setGeometry(0,0,10,10);
+    imagesTabs->setCurrentPage(0);
+    emit signalChangeStatusbar(i18n("Image pasted."));
+
+    Options *o=new Options();
+    if (!preserveCheck->isChecked())
+    {  //I have to reset the options
+      o->defaultOptions();
+    }
+    else
+    {
+      o=*m_currentState;
+    }
+    m_state.clear();
+    m_oldPreviews.clear();
+    m_state.push_back(o);
+    if(previewLabel->pixmap()!=0)
+      m_oldPreviews.push_back(*(previewLabel->pixmap()));
+    else
+      m_oldPreviews.push_back(QPixmap());
+    m_currentState=m_state.begin();
+    m_currentPreview=m_oldPreviews.begin();
+
+    readOptions();
+  }
+}
+
+void MainWidget::getImageFromURL(KURL url) {
+  QString filename;				// prevent overwriting previous local file with current remote one
+  if (!url.isLocalFile())
+  {           // download to temporary file
+    if (!KIO::NetAccess::download(url,filename,this))
+      emit signalChangeStatusbar(i18n("Selected URL is not a valid image."));
+    return;
+  }
+  else
+    filename=url.path();
+
+  if(!createTmpFilename())
+  {
+    emit signalChangeStatusbar(i18n("Could not create temporary filename."));
+    return;
+  }
+
+  m_outputFilename="";
+  QPixmap pix(filename);
+  originalLabel->clear();
+  originalLabel->setGeometry(0,0,pix.width(),pix.height());
+  originalLabel->setPixmap(pix);
+  previewLabel->clear();
+  previewLabel->setGeometry(0,0,10,10);
+  imagesTabs->setCurrentPage(0);
+  emit signalChangeStatusbar(i18n("File %1 loaded.").arg(filename));
+
+  if (!url.isLocalFile())
+    KIO::NetAccess::removeTempFile(filename);
+
+  Options *o=new Options();
+  if (!preserveCheck->isChecked())
+  {  //I have to reset the options
+    o->defaultOptions();
+  }
+  else
+  {
+    o=*m_currentState;
+  }
+  m_state.clear();
+  m_oldPreviews.clear();
+  m_state.push_back(o);
+  if(previewLabel->pixmap()!=0)
+    m_oldPreviews.push_back(*(previewLabel->pixmap()));
+  else
+    m_oldPreviews.push_back(QPixmap());
+  m_currentState=m_state.begin();
+  m_currentPreview=m_oldPreviews.begin();
+
+  readOptions();
+}
+
+void MainWidget::readOptions() {
+  //input
+	blackLevel->setValue(((**m_currentState)["blackLevel"]).toFloat());
+	invertInput->setChecked((**m_currentState)["invertInput"]=="y");
+
+  //output
+	outputFormat->setCurrentText((**m_currentState)["outputFormat"]);
+	if((**m_currentState)["outputFormat"]==i18n("eps") || (**m_currentState)["outputFormat"]==i18n("postscript"))
+	{       //eps format
+		pageSize->setCurrentText((**m_currentState)["pageSize"]);
+		optimizedNumericalCode->setChecked((**m_currentState)["optimizedNumericalCode"]=="y");
+		level1->setChecked((**m_currentState)["compressionLevel"]=="1");
+		level2->setChecked((**m_currentState)["compressionLevel"]=="2");
+		level3->setChecked((**m_currentState)["compressionLevel"]=="3");
+	}
+	else if((**m_currentState)["outputFormat"]==i18n("SVG"))            //SVG format
+		SVGGroup->setChecked((**m_currentState)["SVGGroup"]=="y");
+	else if((**m_currentState)["outputFormat"]==i18n("Gimp path"));          //Gimp format
+	else if((**m_currentState)["outputFormat"]==i18n("Xfig path"));          //Xfig format
+	else
+	{                                                              //pgm format
+		antialiasGamma->setValue(((**m_currentState)["antialiasGamma"]).toFloat());
+    //Scale
+		if(((**m_currentState)["scale"]).find('x')==-1)
+		{   //only one value
+			scaleAll->setValue(((**m_currentState)["scale"]).toFloat());
+			scaleAllBTN->setChecked(true);
+		}
+		else
+		{
+			QString tmp=(**m_currentState)["scale"];
+			scaleX->setValue((tmp.section('x',0,0)).toFloat());
+			scaleY->setValue((tmp.section('x',1,1)).toFloat());
+			scaleXYBTN->setChecked(true);
+		}
+	}
+
+  //Color
+	foregroundBtn->setColor(QColor((**m_currentState)["foregroundBtn"]));
+	opaque->setChecked((**m_currentState)["opaque"]=="y");
+	backgroundBtn->setColor(QColor((**m_currentState)["backgroundBtn"]));
+
+  //Algorithm
+	policy->setCurrentItem(((**m_currentState)["policy"]).toInt());
+	despeckle->setValue(((**m_currentState)["despeckle"]).toInt());
+	cornerThreshold->setValue(((**m_currentState)["cornerThreshold"]).toFloat());
+	optimizationTolerance->setValue(((**m_currentState)["optimizationTolerance"]).toFloat());
+	outputQuantization->setValue(((**m_currentState)["outputQuantization"]).toInt());
+	curveOptimization->setChecked((**m_currentState)["curveOptimization"]=="y");
+
+  //Transformation
+	width->setValue(((**m_currentState)["width"]).toFloat());
+	height->setValue(((**m_currentState)["height"]).toFloat());
+	stretch->setValue(((**m_currentState)["stretch"]).toFloat());
+	rotation->setValue(((**m_currentState)["rotation"]).toFloat());
+
+  //Resolution
+	if(((**m_currentState)["resolution"]).find('x')==-1)
+	{ //only one value
+		resolutionAll->setValue(((**m_currentState)["resolution"]).toFloat());
+		resolutionAllBTN->setChecked(true);
+	}
+	else
+	{
+		QString tmp=(**m_currentState)["resolution"];
+		resolutionX->setValue((tmp.section('x',0,0)).toFloat());
+		resolutionY->setValue((tmp.section('x',1,1)).toFloat());
+		resolutionXYBTN->setChecked(true);
+	}
+
+  //Margins
+		QString tmp=(**m_currentState)["margins"];
+		marginsL->setValue((tmp.section('x',0,0)).toFloat());
+		marginsR->setValue((tmp.section('x',1,1)).toFloat());
+		marginsT->setValue((tmp.section('x',2,2)).toFloat());
+		marginsB->setValue((tmp.section('x',3,3)).toFloat());
+		checkBoxSyncronizeMargins->setChecked((**m_currentState)["syncronizeMargins"]=="y");
+		
+	//missing restoring for autotrace interface part
+		
+}
+
+void MainWidget::getOptions() {
+	if(backendCombo->currentText()=="potrace")
+		getPotraceOptions();
+	else
+		getAutotraceOptions();
+}
+
+void MainWidget::getPotraceOptions( ) {
+  //input-output
+	(*m_currentState)->setValue("blackLevel",QString::number(blackLevel->value()));
+	if(invertInput->isChecked())
+		(*m_currentState)->setValue("invertInput","y");
+	else
+		(*m_currentState)->setValue("invertInput","n");
+	(*m_currentState)->setValue("outputFormat",outputFormat->currentText());
+	if(outputFormat->currentText()==i18n("eps") || outputFormat->currentText()==i18n("postscript"))
+	{  //ps options
+		(*m_currentState)->setValue("pageSize",pageSize->currentText());
+		(*m_currentState)->setValue("optimizedNumericalCode",(optimizedNumericalCode->isChecked())?"y":"n");
+		QButton *b=compressionLevel->selected();
+		if(b->text()=="None")
+			(*m_currentState)->setValue("compressionLevel","1");
+		else if(b->text()=="Level 2")
+			(*m_currentState)->setValue("compressionLevel","2");
+		else
+			(*m_currentState)->setValue("compressionLevel","3");
+	}
+	else if(outputFormat->currentText()==i18n("SVG"))
+	{  //SVG options
+		(*m_currentState)->setValue("SVGGroup",(SVGGroup->isChecked())?"y":"n");
+	}
+	else if(outputFormat->currentText()==i18n("Gimp path"))
+	{  //Gimp options
+	}
+	else if(outputFormat->currentText()==i18n("Xfig"))
+	{  //Xfig options
+	}
+	else
+	{  //pgm options
+		(*m_currentState)->setValue("antialiasGamma",QString::number(antialiasGamma->value()));
+    //Scale
+		if(scaleAll->isEnabled())
+			(*m_currentState)->setValue("scale",QString::number(scaleAll->value()));
+		else
+			(*m_currentState)->setValue("scale",QString::number(scaleX->value())+"x"+QString::number(scaleY->value()));
+	}
+
+  //Color
+	QColor c=foregroundBtn->color();
+	(*m_currentState)->setValue("foregroundBtn",c.name());
+	(*m_currentState)->setValue("opaque",(opaque->isChecked())?"y":"n");
+	c=backgroundBtn->color();
+	(*m_currentState)->setValue("backgroundBtn",c.name());
+
+  //Algorithm
+	(*m_currentState)->setValue("policy",QString::number(policy->currentItem()));
+	(*m_currentState)->setValue("despeckle",QString::number(despeckle->value()));
+	(*m_currentState)->setValue("cornerThreshold",QString::number(cornerThreshold->value()));
+	(*m_currentState)->setValue("optimizationTolerance",QString::number(optimizationTolerance->value()));
+	(*m_currentState)->setValue("outputQuantization",QString::number(outputQuantization->value()));
+	(*m_currentState)->setValue("curveOptimization",(curveOptimization->isChecked())?"y":"n");
+
+  //Transformation
+	(*m_currentState)->setValue("width",QString::number(width->value()));
+	(*m_currentState)->setValue("height",QString::number(height->value()));
+	(*m_currentState)->setValue("stretch",QString::number(stretch->value()));
+	(*m_currentState)->setValue("rotation",QString::number(rotation->value()));
+
+  //Resolution
+	if(resolutionAll->isEnabled())
+		(*m_currentState)->setValue("resolution",QString::number(resolutionAll->value()));
+	else
+		(*m_currentState)->setValue("resolution",QString::number(resolutionX->value())+"x"+QString::number(resolutionY->value()));
+
+  //Margins
+	(*m_currentState)->setValue("syncronizeMargins",checkBoxSyncronizeMargins->isChecked()?"y":"n");
+	(*m_currentState)->setValue("margins",QString::number(marginsL->value())+"x"+QString::number(marginsR->value())+"x"+QString::number(marginsT->value())+"x"+QString::number(marginsB->value()));
+}
+
+void MainWidget::getAutotraceOptions( ) {
+	Options *opt=*m_currentState;
+	
+	opt->clear();
+	
+	//input output
+	QString tmp=autotraceOutputFormat->currentText();
+	tmp.truncate(tmp.find(" "));
+	opt->setValue("outputFormat",tmp);
+	if(autotraceDpiCheckbox->isChecked() && autotraceDpiInput->value()!=0)
+		opt->setValue("dpi",QString::number(autotraceDpiInput->value()));
+	opt->setValue("reduceColorsEnabled",(autotraceCheckBoxReduceColors->isChecked())?"y":"n");
+	opt->setValue("colorCount",QString::number(autotraceColorCount->value()));
+	if(autotraceUseBackground->isChecked())
+		opt->setValue("background",autotraceBackground->color().name().upper());
+	if(autotraceLog->isChecked())
+		opt->setValue("log","y");
+	
+	//corners and curves
+	if(autotraceThreshold->value()!=100)
+		opt->setValue("threshold",QString::number(autotraceThreshold->value()));
+	if(autotraceAlwaysThreshold->value()!=60)
+		opt->setValue("alwaysThreshold",QString::number(autotraceAlwaysThreshold->value()));
+	if(autotraceSurround->value()!=4)
+		opt->setValue("surround",QString::number(autotraceSurround->value()));
+	if(autotraceAdjacentCorners->isChecked())
+		opt->setValue("removeAdjacentCorners","y");
+	if(autotraceErrorThreshold->value()!=2)
+		opt->setValue("errorThreshold",QString::number(autotraceErrorThreshold->value()));
+	if(autotraceLineThreshold->value()!=1)
+		opt->setValue("lineThreshold",QString::number(autotraceLineThreshold->value()));
+	if(autotraceReversionThreshold->value()!=0.01)
+		opt->setValue("reversionThreshold",QString::number(autotraceReversionThreshold->value()));
+	if(autotraceIterations->value()!=4)
+		opt->setValue("iterations",QString::number(autotraceIterations->value()));
+	if(autotracePreserveWidth->isChecked())
+		opt->setValue("preserveWidth","y");
+	
+	//various
+	if(autotraceCenterline->isChecked())
+		opt->setValue("centerline","y");
+	if(autotraceTangentSurround->value()!=3)
+		opt->setValue("tangentSurround",QString::number(autotraceTangentSurround->value()));
+		
+	//despeckle
+	opt->setValue("doDespeckle",(autotraceDoDespeckle->isChecked()?"y":"n"));
+	opt->setValue("despeckleLevel",QString::number(autotraceDespeckleLevel->value()));
+	opt->setValue("despeckleTightness",QString::number(autotraceDespeckleTightness->value()));	
+}
+
+QStringList MainWidget::createCommandLine() {
+	if(backendCombo->currentText()=="potrace")
+		return createPotraceCommandLine();
+	else
+		return createAutotraceCommandLine();
+}
+
+QStringList MainWidget::createPotraceCommandLine( ) {
+	QStringList toReturn;
+	toReturn+="potrace";
+
+  //input
+	if((**m_currentState)["blackLevel"]!="0.5")   //only if it is not the default value
+		toReturn+="-k"+(**m_currentState)["blackLevel"];
+	if((**m_currentState)["invertInput"]=="y")
+		toReturn+="-i";
+
+  //output
+	toReturn+="-o";
+	toReturn+=m_tmpFilename;
+	if((**m_currentState)["outputFormat"]==i18n("eps"))
+	{                   //eps format
+		toReturn+="-e";
+		toReturn+="-P"+(**m_currentState)["pageSize"];
+		toReturn+="-C"+(**m_currentState)["foregroundBtn"];
+		if((**m_currentState)["opaque"]=="y")
+		{
+			toReturn+="--opaque";
+      //toReturn+="--fillcolor"+(**m_currentState)["backgroundBtn"];
+		}
+		if((**m_currentState)["optimizedNumericalCode"]=="n")
+			toReturn+="-q";
+		if((**m_currentState)["compressionLevel"]=="1")
+			toReturn+="-c";
+		if((**m_currentState)["compressionLevel"]=="2")
+			toReturn+="-2";
+		if((**m_currentState)["compressionLevel"]=="3")
+			toReturn+="-3";
+	}
+	else if((**m_currentState)["outputFormat"]==i18n("postscript"))
+	{      //ps format
+		toReturn+="-p";
+		toReturn+="-P"+(**m_currentState)["pageSize"];
+		toReturn+="-C"+(**m_currentState)["foregroundBtn"];
+		if((**m_currentState)["opaque"]=="y")
+		{
+			toReturn+="--opaque";
+      //toReturn+="--fillcolor"+(**m_currentState)["backgroundBtn"];
+		}
+		if((**m_currentState)["optimizedNumericalCode"]=="n")
+			toReturn+="-q";
+		if((**m_currentState)["compressionLevel"]=="1")
+			toReturn+="-c";
+		if((**m_currentState)["compressionLevel"]=="2")
+			toReturn+="-2";
+		if((**m_currentState)["compressionLevel"]=="3")
+			toReturn+="-3";
+	}
+	else if((**m_currentState)["outputFormat"]==i18n("SVG"))
+	{            //SVG format
+		toReturn+="-s";
+		toReturn+="-C"+(**m_currentState)["foregroundBtn"];
+		if((**m_currentState)["opaque"]=="y")
+		{
+			toReturn+="--opaque";
+      //toReturn+="--fillcolor"+(**m_currentState)["backgroundBtn"];
+		}
+		if((**m_currentState)["SVGGroup"]=="y")
+			toReturn+="--group";
+	}
+	else if((**m_currentState)["outputFormat"]==i18n("Gimp path"))
+	{            //Gimp format
+		toReturn+="-bgimppath";
+	}
+	else if((**m_currentState)["outputFormat"]==i18n("Xfig"))
+	{            //Xfig format
+		toReturn+="-bxfig";
+		toReturn+="-C"+(**m_currentState)["foregroundBtn"];
+		if((**m_currentState)["opaque"]=="y")
+		{
+			toReturn+="--opaque";
+      //toReturn+="--fillcolor"+(**m_currentState)["backgroundBtn"];
+		}
+	}
+	else
+	{  //pgm format
+		toReturn+="-g";
+		toReturn+="-G"+(**m_currentState)["antialiasGamma"];
+		if((**m_currentState)["opaque"]=="y")
+		{
+			toReturn+="--opaque";
+      //toReturn+="--fillcolor"+(**m_currentState)["backgroundBtn"];
+		}
+	}
+
+  //Algorithm
+	switch((**m_currentState)["policy"].toInt()) {
+		case 0:
+			toReturn+="-zblack";
+			break;
+		case 1:
+			toReturn+="-zwhite";
+			break;
+		case 2:
+			toReturn+="-zright";
+			break;
+		case 3:
+			toReturn+="-zleft";
+			break;
+		case 4:
+			toReturn+="-zminority";
+			break;
+		case 5:
+			toReturn+="-zmajority";
+			break;
+		case 6:
+			toReturn+="-zrandom";
+			break;
+		default:
+			toReturn+="-zminority";
+			break;
+	}
+	toReturn+="-t"+(**m_currentState)["despeckle"];
+	toReturn+="-a"+(**m_currentState)["cornerThreshold"];
+	toReturn+="-O"+(**m_currentState)["optimizationTolerance"];
+	toReturn+="-u"+(**m_currentState)["outputQuantization"];
+	if((**m_currentState)["curveOptimization"]=="n")
+		toReturn+="-n";
+
+  //Transformation
+	if((**m_currentState)["width"]!="0")
+		toReturn+="-W"+(**m_currentState)["width"]+"cm";
+	if((**m_currentState)["height"]!="0")
+		toReturn+="-H"+(**m_currentState)["height"]+"cm";
+	if((**m_currentState)["stretch"]!="1")
+		toReturn+="-S"+(**m_currentState)["stretch"];
+	if((**m_currentState)["rotation"]!="0")
+		toReturn+="-A"+(**m_currentState)["rotation"];
+
+  //Resolution
+	if((**m_currentState)["resolution"]!="0" && (**m_currentState)["resolution"]!="0x0")
+		toReturn+="-r"+(**m_currentState)["resolution"];
+
+  //Margins		
+	if((**m_currentState)["margins"]!="0" && (**m_currentState)["margins"]!="0x0x0x0")
+	{
+		if((**m_currentState)["margins"].find('x')==-1)
+			toReturn+="-M"+(**m_currentState)["margins"]+"cm";
+		else
+		{
+			QString tmp=(**m_currentState)["margins"];
+			toReturn+="-L"+tmp.section('x',0,0)+"cm";
+			toReturn+="-R"+tmp.section('x',1,1)+"cm";
+			toReturn+="-T"+tmp.section('x',2,2)+"cm";
+			toReturn+="-B"+tmp.section('x',3,3)+"cm";
+		}
+	}
+
+	return toReturn;
+}
+
+QStringList MainWidget::createAutotraceCommandLine( ) {
+	QStringList toReturn;
+	QString tmp;
+	toReturn+="autotrace";
+	
+	//iput-output
+	toReturn+="--output-file";
+	toReturn+=m_tmpFilename;
+	toReturn+="-output-format";
+	toReturn+=(**m_currentState)["outputFormat"];
+	if((**m_currentState)["dpi"]!="")
+		toReturn+="--dpi="+(**m_currentState)["dpi"];
+	if((**m_currentState)["reduceColorsEnabled"]=="y")
+		toReturn+="--color-count="+(**m_currentState)["colorCount"];
+	if((**m_currentState)["background"]!="") {
+		tmp=(**m_currentState)["background"];
+		tmp=tmp.right(tmp.length()-1);
+		toReturn+="-background-color="+tmp;
+	}
+	if((**m_currentState)["log"]=="y")
+		toReturn+="-log";
+	
+	//corner and curves
+	if((**m_currentState)["threshold"]!="")
+		toReturn+="--corner-threshold="+(**m_currentState)["threshold"];
+	if((**m_currentState)["alwaysThreshold"]!="")
+		toReturn+="--corner-always-threshold="+(**m_currentState)["alwaysThreshold"];
+	if((**m_currentState)["surround"]!="")
+		toReturn+="--corner-surround="+(**m_currentState)["surround"];
+	if((**m_currentState)["removeAdjacentCorners"]=="y")
+		toReturn+="--remove-adjacent-corners";
+	if((**m_currentState)["errorThreshold"]!="")
+		toReturn+="--error-threshold="+(**m_currentState)["errorThreshold"];
+	if((**m_currentState)["lineThreshold"]!="")
+		toReturn+="--line-threshold="+(**m_currentState)["lineThreshold"];
+	if((**m_currentState)["reversionThreshold"]!="")
+		toReturn+="--line-reversion-threshold="+(**m_currentState)["reversionThreshold"];
+	if((**m_currentState)["iterations"]!="")
+		toReturn+="--filter-iterations="+(**m_currentState)["iterations"];
+	if((**m_currentState)["preserveWidth"]=="y")
+		toReturn+="--preserve-width";
+	
+	//various
+	if((**m_currentState)["centerline"]=="y")
+		toReturn+="--centerline";
+	if((**m_currentState)["tangentSurround"]!="")
+		toReturn+="--tangent-surround="+(**m_currentState)["tangentSurround"];
+	
+	//despeckle
+	if((**m_currentState)["doDespeckle"]=="y") {
+		toReturn+="--despeckle-level="+(**m_currentState)["despeckleLevel"];
+		toReturn+="--despeckle-tightness="+(**m_currentState)["despeckleTightness"];
+	};
+	
+	//input file
+	char inputFile[]="/tmp/potraceguiTmp-XXXXXX";
+	mkstemp(inputFile);
+	m_tmpInputFilename=QString(inputFile);
+	originalLabel->pixmap()->save(m_tmpInputFilename,"PPM");
+	toReturn+="--input-format=PPM";
+	toReturn+=m_tmpInputFilename;
+		
+	qDebug("Executed:\n%s",toReturn.join(" ").ascii());
+	
+	return toReturn;
+}
+
+void MainWidget::trace() {
+  if(originalLabel->pixmap()==0)
+  {
+    emit(signalChangeStatusbar(i18n("You must open an image first.")));
+    return;
+  }
+  setCursor(WaitCursor);
+  if (tracer.isRunning())
+  {       // already tracing, this means abort
+    aborted=true;
+    tracer.tryTerminate();
+    return;
+  }
+  aborted=false;
+
+  getOptions();
+  QStringList commandLine=createCommandLine();
+  tracer.clearArguments();
+  tracer.setArguments(commandLine);
+
+  if(!(tracer.start()))
+  {
+    previewLabel->setText(i18n("The process couldn't be started\nThe process executed was:\n")+commandLine.join(" "));
+    emit(signalChangeStatusbar("Error executing command"));
+    setCursor(ArrowCursor);
+    imagesTabs->setCurrentPage(1);
+  }
+  else
+  {
+    emit(signalChangeStatusbar(i18n("Tracing...")));
+    traceBtn->setText(i18n("Abort"));
+    QByteArray pixData;
+    QBuffer buf(pixData);
+    buf.open(IO_WriteOnly);
+    originalLabel->pixmap()->save(&buf,"PPM");
+    tracer.writeToStdin(pixData);
+  }
+}
+
+void MainWidget::tracerExited() {
+  traceBtn->setText(i18n("&Trace"));
+  if (aborted)
+  {
+    emit(signalChangeStatusbar(i18n("Aborted")));
+    setCursor(ArrowCursor);
+    return;
+  }
+  if(tracer.exitStatus()!=0)
+  {
+    emit(signalChangeStatusbar(i18n("Finished with errors")));
+    QString tmp(i18n("Error during the process:"));
+    tmp+=i18n("Standard output:\n");
+    QString t=tracer.readLineStdout();
+    while(t!=QString::null)
+    {
+      tmp+= t+"\n";
+      t=tracer.readLineStdout();
+    }
+    tmp+=i18n("Standard error:\n");
+    t=tracer.readLineStderr();
+    while(t!=QString::null)
+    {
+      tmp+=t+"\n";
+      t=tracer.readLineStderr();
+    }
+    QStringList l=tracer.arguments();
+    tmp+=i18n("Executed:\n")+l.join(" ");
+    previewLabel->setText(tmp);
+    setCursor(ArrowCursor);
+    imagesTabs->setCurrentPage(1);
+    return;
+  }
+
+  if(autoTraceCheck->isChecked())
+  {
+    emit(signalChangeStatusbar(i18n("Loading preview image...")));
+    QImage img(m_tmpFilename);
+    QPixmap pix;
+    if(pix.convertFromImage(img,0))
+    {
+      previewLabel->clear();
+		previewLabel->setGeometry(0,0,pix.width(),pix.height());
+      previewLabel->setPixmap(pix);
+    }
+    else
+    {
+      emit(signalChangeStatusbar(i18n("Output format not recognized")));
+      previewLabel->setText(i18n("Sorry, but the image format which you are working with\nis not recognized by KDE.\nThe image will be correctly saved if you want to,\nbut to see a preview try working with another image format (EPS and PGM showld work well)\nand only when you are satisfied with the result revert to the format\nof your choiche and save the result."));
+      imagesTabs->setCurrentPage(1);
+      setCursor(ArrowCursor);
+      return;
+    }
+
+    imagesTabs->setCurrentPage(1);
+  }
+
+  //delete autotrace tempfile
+  if(backendCombo->currentText()=="autotrace") {
+	  QFile tmp(m_tmpInputFilename);
+	  tmp.remove();
+  }
+  
+  setCursor(ArrowCursor);
+  m_changed=true;
+  emit(signalChangeStatusbar(i18n("Image traced")));
+}
+
+void MainWidget::writeCompleted() {
+  tracer.closeStdin();
+}
+
+bool MainWidget::createTmpFilename() {
+  char tmp[]="/tmp/potraceguiTmp-XXXXXX";
+  if (mkstemp(tmp)!=-1)
+  {
+    m_tmpFilename=QString(tmp);
+    return true;
+  }
+  else
+    return false;
+}
+
+bool MainWidget::deleteTmpFilename() {
+  QFile tmp(m_tmpFilename);
+  bool toReturn=tmp.remove();
+  if(toReturn==true)
+    m_tmpFilename="";
+  return toReturn;
+}
+
+int MainWidget::notificationDialog(QString caption, QString text) {
+  KDialogBase w(this, "potracegui", true, caption, KDialogBase::Ok|KDialogBase::Cancel,KDialogBase::Ok,true);
+  w.setMainWidget(new QLabel(text,&w));
+  w.exec();
+  return w.result();
+}
+
+void MainWidget::dragEnterEvent(QDragEnterEvent* event) {
+  event->accept(KURLDrag::canDecode(event));
+}
+
+void MainWidget::dropEvent(QDropEvent* event) {
+  KURL::List urls;
+  if (KURLDrag::decode(event,urls))
+  {
+    getImageFromURL(urls[0]);
+  }
+}
+
+void MainWidget::defaultOptions() {
+  	/*Load default options*/
+	backendCombo->setCurrentItem(0);
+	backendStack->raiseWidget(potracePage);
+  	Options *o=new Options();
+  	o->defaultOptions();
+  	m_state.clear();
+  	m_oldPreviews.clear();
+  	m_state.push_back(o);
+  	m_oldPreviews.push_back(QPixmap());
+  	m_currentState=m_state.begin();
+  	m_currentPreview=m_oldPreviews.begin();
+	
+	//default options for autotrace
+	autotraceTabs->setCurrentPage(0);
+	autotraceOutputFormat->setCurrentItem(0);
+	autotraceDpiCheckbox->setChecked(false);
+	autotraceDpiInput->setValue(0);
+	autotraceCheckBoxReduceColors->setChecked(true);
+	autotraceColorCount->setValue(2);
+	autotraceUseBackground->setChecked(false);
+	autotraceBackground->setColor("#ffffff");
+	autotraceLog->setChecked(false);
+	autotraceThreshold->setValue(100);
+	autotraceAlwaysThreshold->setValue(60);
+	autotraceSurround->setValue(4);
+	autotraceAdjacentCorners->setChecked(false);
+	autotraceErrorThreshold->setValue(2);
+	autotraceLineThreshold->setValue(1);
+	autotraceReversionThreshold->setValue(0.01);
+	autotraceIterations->setValue(4);
+	autotracePreserveWidth->setChecked(false);
+	autotraceNoCenterline->setChecked(true);
+	autotraceTangentSurround->setValue(3);
+	autotraceDoDespeckle->setChecked(false);
+	autotraceDespeckleLevel->setValue(1);
+	autotraceDespeckleTightness->setValue(2);
+
+  	readOptions();
+  	optionsStack->raiseWidget(psPage);
+}
+
+void MainWidget::showOptions(const QString &selection) {
+	if(selection==i18n("SVG"))
+		optionsStack->raiseWidget(svgPage);
+	else if(selection==i18n("pgm"))
+		optionsStack->raiseWidget(pgmPage);
+	else if(selection==i18n("postscript") || selection==i18n("eps"))
+		optionsStack->raiseWidget(psPage);
+	else
+		optionsStack->raiseWidget(undefinedPage);
+}
+
+void MainWidget::backendChoosen( const QString & back ) {
+	if(back=="potrace")
+		backendStack->raiseWidget(potracePage);
+	else
+		backendStack->raiseWidget(autotracePage);
+}
+
+void MainWidget::marginValueChanged( double newValue)  {
+	if (marginValueSynconizingNecessary and checkBoxSyncronizeMargins->isChecked()) {
+		marginValueSynconizingNecessary=false;
+		marginsL->setValue(newValue);
+		marginsR->setValue(newValue);
+		marginsT->setValue(newValue);
+		marginsB->setValue(newValue);
+		marginValueSynconizingNecessary=true;
+	}
+}
+
+#include "mainwidget.moc"