kdeprint Library API Documentation

kpfilterpage.cpp

00001 /*
00002  *  This file is part of the KDE libraries
00003  *  Copyright (c) 2001 Michael Goffioul <kdeprint@swing.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         if (!cmd) return; // Error
00122         QStringList filters = activeList();
00123         int     pos = KXmlCommandManager::self()->insertCommand(filters, cmd->name());
00124         QListViewItem   *prev(0);
00125         if (pos > 0)
00126         {
00127             prev = m_view->firstChild();
00128             for (int i=1;prev && i<pos;i++)
00129                 prev = prev->nextSibling();
00130         }
00131         m_activefilters.insert(cmd->name(), cmd);
00132         QListViewItem   *item = new QListViewItem(m_view, prev, cmd->description(), cmd->name());
00133         item->setPixmap(0, SmallIcon("filter"));
00134         checkFilterChain();
00135     }
00136 }
00137 
00138 void KPFilterPage::slotRemoveClicked()
00139 {
00140     if (m_view->selectedItem())
00141     {
00142         QString idname = m_view->selectedItem()->text(1);
00143         delete m_view->selectedItem();
00144         m_activefilters.remove(idname);
00145         checkFilterChain();
00146         if (m_view->currentItem())
00147             m_view->setSelected(m_view->currentItem(), true);
00148         slotItemSelected(m_view->currentItem());
00149     }
00150 }
00151 
00152 void KPFilterPage::slotUpClicked()
00153 {
00154     QListViewItem   *item = m_view->selectedItem();
00155     if (item && item->itemAbove())
00156     {
00157         QListViewItem   *clone = new QListViewItem(m_view,item->itemAbove()->itemAbove(),item->text(0),item->text(1));
00158         clone->setPixmap(0, SmallIcon("filter"));
00159         delete item;
00160         m_view->setSelected(clone, true);
00161         checkFilterChain();
00162     }
00163 }
00164 
00165 void KPFilterPage::slotDownClicked()
00166 {
00167     QListViewItem   *item = m_view->selectedItem();
00168     if (item && item->itemBelow())
00169     {
00170         QListViewItem   *clone = new QListViewItem(m_view,item->itemBelow(),item->text(0),item->text(1));
00171         clone->setPixmap(0, SmallIcon("filter"));
00172         delete item;
00173         m_view->setSelected(clone, true);
00174         checkFilterChain();
00175     }
00176 }
00177 
00178 void KPFilterPage::slotConfigureClicked()
00179 {
00180     KXmlCommand *filter = currentFilter();
00181     if (!filter || !KXmlCommandManager::self()->configure(filter, this))
00182         KMessageBox::error(this,i18n("Internal error: unable to load filter."));
00183 }
00184 
00185 void KPFilterPage::slotItemSelected(QListViewItem *item)
00186 {
00187     m_remove->setEnabled((item != 0));
00188     m_up->setEnabled((item != 0 && item->itemAbove() != 0));
00189     m_down->setEnabled((item != 0 && item->itemBelow() != 0));
00190     m_configure->setEnabled((item != 0));
00191     updateInfo();
00192 }
00193 
00194 void KPFilterPage::setOptions(const QMap<QString,QString>& opts)
00195 {
00196     QStringList filters = QStringList::split(',',opts["_kde-filters"],false);
00197     // remove unneeded filters
00198     QDictIterator<KXmlCommand>  dit(m_activefilters);
00199     for (;dit.current();)
00200     {
00201         if (filters.find(dit.currentKey()) == filters.end())
00202             m_activefilters.remove(dit.currentKey());
00203         else
00204         {
00205             dit.current()->setOptions(opts);
00206             ++dit;
00207         }
00208     }
00209     // add needed filters
00210     m_view->clear();
00211     QListViewItem   *item(0);
00212     for (QStringList::ConstIterator sit=filters.begin(); sit!=filters.end(); ++sit)
00213     {
00214         KXmlCommand *f(0);
00215         if ((f=m_activefilters.find(*sit)) == 0)
00216         {
00217             f = KXmlCommandManager::self()->loadCommand(*sit);
00218             if (f)
00219             {
00220                 m_activefilters.insert(*sit,f);
00221                 f->setOptions(opts);
00222             }
00223         }
00224         if (f)
00225             item = new QListViewItem(m_view,item,f->description(),f->name());
00226     }
00227     checkFilterChain();
00228 }
00229 
00230 void KPFilterPage::getOptions(QMap<QString,QString>& opts, bool incldef)
00231 {
00232     QStringList filters = activeList();
00233     for (QStringList::ConstIterator it=filters.begin(); it!=filters.end(); ++it)
00234     {
00235         KXmlCommand *f = m_activefilters.find(*it);
00236         if (f)
00237             f->getOptions(opts, incldef);
00238     }
00239     if (filters.count() > 0 || incldef)
00240     {
00241         opts["_kde-filters"] = filters.join(",");
00242     }
00243 }
00244 
00245 QStringList KPFilterPage::activeList()
00246 {
00247     QStringList list;
00248     QListViewItem   *item = m_view->firstChild();
00249     while (item)
00250     {
00251         list.append(item->text(1));
00252         item = item->nextSibling();
00253     }
00254     return list;
00255 }
00256 
00257 KXmlCommand* KPFilterPage::currentFilter()
00258 {
00259     KXmlCommand *filter(0);
00260     if (m_view->selectedItem())
00261         filter = m_activefilters.find(m_view->selectedItem()->text(1));
00262     return filter;
00263 }
00264 
00265 void KPFilterPage::checkFilterChain()
00266 {
00267     QListViewItem   *item = m_view->firstChild();
00268     bool        ok(true);
00269     m_valid = true;
00270     while (item)
00271     {
00272         item->setPixmap(0, (ok ? SmallIcon("filter") : SmallIcon("filterstop")));
00273         KXmlCommand *f1 = m_activefilters.find(item->text(1));
00274         if (f1 && item->nextSibling())
00275         {
00276             KXmlCommand *f2 = m_activefilters.find(item->nextSibling()->text(1));
00277             if (f2)
00278             {
00279                 if (!f2->acceptMimeType(f1->mimeType()))
00280                 {
00281                     item->setPixmap(0, SmallIcon("filterstop"));
00282                     ok = false;
00283                     m_valid = false;
00284                 }
00285                 else
00286                     ok = true;
00287             }
00288         }
00289         item = item->nextSibling();
00290     }
00291 }
00292 
00293 bool KPFilterPage::isValid(QString& msg)
00294 {
00295     if (!m_valid)
00296     {
00297         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>");
00298     }
00299     return m_valid;
00300 }
00301 
00302 void KPFilterPage::updateInfo()
00303 {
00304     QString txt;
00305     KXmlCommand *f = currentFilter();
00306     if (f)
00307     {
00308         QString templ("<b>%1:</b> %2<br>");
00309         txt.append(templ.arg(i18n("Name")).arg(f->name()));
00310         txt.append(templ.arg(i18n("Requirements")).arg(f->requirements().join(", ")));
00311         txt.append(templ.arg(i18n("Input")).arg(f->inputMimeTypes().join(", ")));
00312         txt.append(templ.arg(i18n("Output")).arg(f->mimeType()));
00313         if ( !f->comment().isEmpty() )
00314             txt.append( "<br>" ).append( f->comment() );
00315     }
00316     m_info->setText(txt);
00317 }
00318 
00319 #include "kpfilterpage.moc"
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This file is part of the documentation for kdeprint Library Version 3.2.2.
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