kdeprint Library API Documentation

kpfilterpage.cpp

00001 /*
00002  *  This file is part of the KDE libraries
00003  *  Copyright (c) 2001 Michael Goffioul <goffioul@imec.be>
00004  *
00005  *  This library is free software; you can redistribute it and/or
00006  *  modify it under the terms of the GNU Library General Public
00007  *  License version 2 as published by the Free Software Foundation.
00008  *
00009  *  This library is distributed in the hope that it will be useful,
00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  *  Library General Public License for more details.
00013  *
00014  *  You should have received a copy of the GNU Library General Public License
00015  *  along with this library; see the file COPYING.LIB.  If not, write to
00016  *  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00017  *  Boston, MA 02111-1307, USA.
00018  **/
00019 
00020 #include "kpfilterpage.h"
00021 #include "kmfactory.h"
00022 #include "kxmlcommand.h"
00023 
00024 #include <qtoolbutton.h>
00025 #include <qheader.h>
00026 #include <qtooltip.h>
00027 #include <qlayout.h>
00028 #include <klistview.h>
00029 #include <klocale.h>
00030 #include <kiconloader.h>
00031 #include <kmessagebox.h>
00032 #include <kactivelabel.h>
00033 #include <kdebug.h>
00034 #include <kapplication.h>
00035 #include <kdialog.h>
00036 
00037 KPFilterPage::KPFilterPage(QWidget *parent, const char *name)
00038 : KPrintDialogPage(parent,name)
00039 {
00040     setTitle(i18n("Filters"));
00041     m_activefilters.setAutoDelete(true);
00042     m_valid = true;
00043 
00044     m_view = new KListView(this);
00045     m_view->addColumn("");
00046     m_view->setFrameStyle(QFrame::WinPanel|QFrame::Sunken);
00047     m_view->setLineWidth(1);
00048     m_view->setSorting(-1);
00049     m_view->header()->hide();
00050     connect(m_view,SIGNAL(selectionChanged(QListViewItem*)),SLOT(slotItemSelected(QListViewItem*)));
00051 
00052     m_add = new QToolButton(this);
00053     m_add->setIconSet(BarIconSet("filter"));
00054     QToolTip::add(m_add, i18n("Add filter"));
00055     m_remove = new QToolButton(this);
00056     m_remove->setIconSet(BarIconSet("remove"));
00057     QToolTip::add(m_remove, i18n("Remove filter"));
00058     m_up = new QToolButton(this);
00059     m_up->setIconSet(BarIconSet("up"));
00060     QToolTip::add(m_up, i18n("Move filter up"));
00061     m_down = new QToolButton(this);
00062     m_down->setIconSet(BarIconSet("down"));
00063     QToolTip::add(m_down, i18n("Move filter down"));
00064     m_configure = new QToolButton(this);
00065     m_configure->setIconSet(BarIconSet("configure"));
00066     QToolTip::add(m_configure, i18n("Configure filter"));
00067     connect(m_add,SIGNAL(clicked()),SLOT(slotAddClicked()));
00068     connect(m_remove,SIGNAL(clicked()),SLOT(slotRemoveClicked()));
00069     connect(m_up,SIGNAL(clicked()),SLOT(slotUpClicked()));
00070     connect(m_down,SIGNAL(clicked()),SLOT(slotDownClicked()));
00071     connect(m_configure,SIGNAL(clicked()),SLOT(slotConfigureClicked()));
00072     connect(m_view,SIGNAL(doubleClicked(QListViewItem*)),SLOT(slotConfigureClicked()));
00073 
00074     m_info = new KActiveLabel(this);
00075     m_info->setVScrollBarMode( QScrollView::Auto );
00076     m_info->setHScrollBarMode( QScrollView::Auto );
00077     m_info->setFrameStyle( QFrame::Panel|QFrame::Sunken );
00078     m_info->setMinimumSize( QSize( 240, 100 ) );
00079 
00080     QGridLayout *l1 = new QGridLayout(this, 2, 2, 0, KDialog::spacingHint());
00081     l1->setColStretch(0, 1);
00082     QVBoxLayout *l2 = new QVBoxLayout(0, 0, 1);
00083     l1->addWidget(m_view, 0, 0);
00084     l1->addLayout(l2, 0, 1);
00085     l2->addWidget(m_add);
00086     l2->addWidget(m_remove);
00087     l2->addSpacing(5);
00088     l2->addWidget(m_up);
00089     l2->addWidget(m_down);
00090     l2->addSpacing(5);
00091     l2->addWidget(m_configure);
00092     l2->addStretch(1);
00093     l1->addMultiCellWidget(m_info, 1, 1, 0, 1);
00094     slotItemSelected(0);
00095 
00096     resize(100,50);
00097 }
00098 
00099 KPFilterPage::~KPFilterPage()
00100 {
00101 }
00102 
00103 void KPFilterPage::updateButton()
00104 {
00105 /*  QListViewItem   *item = m_view->currentItem();
00106   bool state=(item!=0);
00107   m_remove->setEnabled(state);
00108   m_up->setEnabled((state && item->itemAbove() != 0));
00109   m_down->setEnabled((state && item->itemBelow() != 0));
00110   m_configure->setEnabled(state);*/
00111 }
00112 
00113 void KPFilterPage::slotAddClicked()
00114 {
00115     bool    ok;
00116     QString choice = KXmlCommandManager::self()->selectCommand( this );
00117     ok = !choice.isEmpty();
00118     if (ok)
00119     {
00120         KXmlCommand *cmd = KXmlCommandManager::self()->loadCommand(choice);
00121         QStringList filters = activeList();
00122         int     pos = KXmlCommandManager::self()->insertCommand(filters, cmd->name());
00123         QListViewItem   *prev(0);
00124         if (pos > 0)
00125         {
00126             prev = m_view->firstChild();
00127             for (int i=1;prev && i<pos;i++)
00128                 prev = prev->nextSibling();
00129         }
00130         m_activefilters.insert(cmd->name(), cmd);
00131         QListViewItem   *item = new QListViewItem(m_view, prev, cmd->description(), cmd->name());
00132         item->setPixmap(0, SmallIcon("filter"));
00133         checkFilterChain();
00134     }
00135 }
00136 
00137 void KPFilterPage::slotRemoveClicked()
00138 {
00139     if (m_view->selectedItem())
00140     {
00141         QString idname = m_view->selectedItem()->text(1);
00142         delete m_view->selectedItem();
00143         m_activefilters.remove(idname);
00144         checkFilterChain();
00145         if (m_view->currentItem())
00146             m_view->setSelected(m_view->currentItem(), true);
00147         slotItemSelected(m_view->currentItem());
00148     }
00149 }
00150 
00151 void KPFilterPage::slotUpClicked()
00152 {
00153     QListViewItem   *item = m_view->selectedItem();
00154     if (item && item->itemAbove())
00155     {
00156         QListViewItem   *clone = new QListViewItem(m_view,item->itemAbove()->itemAbove(),item->text(0),item->text(1));
00157         clone->setPixmap(0, SmallIcon("filter"));
00158         delete item;
00159         m_view->setSelected(clone, true);
00160         checkFilterChain();
00161     }
00162 }
00163 
00164 void KPFilterPage::slotDownClicked()
00165 {
00166     QListViewItem   *item = m_view->selectedItem();
00167     if (item && item->itemBelow())
00168     {
00169         QListViewItem   *clone = new QListViewItem(m_view,item->itemBelow(),item->text(0),item->text(1));
00170         clone->setPixmap(0, SmallIcon("filter"));
00171         delete item;
00172         m_view->setSelected(clone, true);
00173         checkFilterChain();
00174     }
00175 }
00176 
00177 void KPFilterPage::slotConfigureClicked()
00178 {
00179     KXmlCommand *filter = currentFilter();
00180     if (!filter || !KXmlCommandManager::self()->configure(filter, this))
00181         KMessageBox::error(this,i18n("Internal error: unable to load filter."));
00182 }
00183 
00184 void KPFilterPage::slotItemSelected(QListViewItem *item)
00185 {
00186     m_remove->setEnabled((item != 0));
00187     m_up->setEnabled((item != 0 && item->itemAbove() != 0));
00188     m_down->setEnabled((item != 0 && item->itemBelow() != 0));
00189     m_configure->setEnabled((item != 0));
00190     updateInfo();
00191 }
00192 
00193 void KPFilterPage::setOptions(const QMap<QString,QString>& opts)
00194 {
00195     QStringList filters = QStringList::split(',',opts["_kde-filters"],false);
00196     // remove unneeded filters
00197     QDictIterator<KXmlCommand>  dit(m_activefilters);
00198     for (;dit.current();)
00199     {
00200         if (filters.find(dit.currentKey()) == filters.end())
00201             m_activefilters.remove(dit.currentKey());
00202         else
00203         {
00204             dit.current()->setOptions(opts);
00205             ++dit;
00206         }
00207     }
00208     // add needed filters
00209     m_view->clear();
00210     QListViewItem   *item(0);
00211     for (QStringList::ConstIterator sit=filters.begin(); sit!=filters.end(); ++sit)
00212     {
00213         KXmlCommand *f(0);
00214         if ((f=m_activefilters.find(*sit)) == 0)
00215         {
00216             f = KXmlCommandManager::self()->loadCommand(*sit);
00217             if (f)
00218             {
00219                 m_activefilters.insert(*sit,f);
00220                 f->setOptions(opts);
00221             }
00222         }
00223         if (f)
00224             item = new QListViewItem(m_view,item,f->description(),f->name());
00225     }
00226     checkFilterChain();
00227 }
00228 
00229 void KPFilterPage::getOptions(QMap<QString,QString>& opts, bool incldef)
00230 {
00231     QStringList filters = activeList();
00232     for (QStringList::ConstIterator it=filters.begin(); it!=filters.end(); ++it)
00233     {
00234         KXmlCommand *f = m_activefilters.find(*it);
00235         if (f)
00236             f->getOptions(opts, incldef);
00237     }
00238     if (filters.count() > 0 || incldef)
00239     {
00240         opts["_kde-filters"] = filters.join(",");
00241     }
00242 }
00243 
00244 QStringList KPFilterPage::activeList()
00245 {
00246     QStringList list;
00247     QListViewItem   *item = m_view->firstChild();
00248     while (item)
00249     {
00250         list.append(item->text(1));
00251         item = item->nextSibling();
00252     }
00253     return list;
00254 }
00255 
00256 KXmlCommand* KPFilterPage::currentFilter()
00257 {
00258     KXmlCommand *filter(0);
00259     if (m_view->selectedItem())
00260         filter = m_activefilters.find(m_view->selectedItem()->text(1));
00261     return filter;
00262 }
00263 
00264 void KPFilterPage::checkFilterChain()
00265 {
00266     QListViewItem   *item = m_view->firstChild();
00267     bool        ok(true);
00268     m_valid = true;
00269     while (item)
00270     {
00271         item->setPixmap(0, (ok ? SmallIcon("filter") : SmallIcon("filterstop")));
00272         KXmlCommand *f1 = m_activefilters.find(item->text(1));
00273         if (f1 && item->nextSibling())
00274         {
00275             KXmlCommand *f2 = m_activefilters.find(item->nextSibling()->text(1));
00276             if (f2)
00277             {
00278                 if (!f2->acceptMimeType(f1->mimeType()))
00279                 {
00280                     item->setPixmap(0, SmallIcon("filterstop"));
00281                     ok = false;
00282                     m_valid = false;
00283                 }
00284                 else
00285                     ok = true;
00286             }
00287         }
00288         item = item->nextSibling();
00289     }
00290 }
00291 
00292 bool KPFilterPage::isValid(QString& msg)
00293 {
00294     if (!m_valid)
00295     {
00296         msg = i18n("<p>The filter chain is wrong. The output format of at least one filter is not supported by its follower. See <b>Filters</b> tab for more information.</p>");
00297     }
00298     return m_valid;
00299 }
00300 
00301 void KPFilterPage::updateInfo()
00302 {
00303     QString txt;
00304     KXmlCommand *f = currentFilter();
00305     if (f)
00306     {
00307         QString templ("<b>%1:</b> %2<br>");
00308         txt.append(templ.arg(i18n("Name")).arg(f->name()));
00309         txt.append(templ.arg(i18n("Requirements")).arg(f->requirements().join(", ")));
00310         txt.append(templ.arg(i18n("Input")).arg(f->inputMimeTypes().join(", ")));
00311         txt.append(templ.arg(i18n("Output")).arg(f->mimeType()));
00312         if ( !f->comment().isEmpty() )
00313             txt.append( "<br>" ).append( f->comment() );
00314     }
00315     m_info->setText(txt);
00316 }
00317 
00318 #include "kpfilterpage.moc"
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This file is part of the documentation for kdeprint Library Version 3.2.0.
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