/*
For general Scribus (>=1.3.2) copyright and licensing information please refer
to the COPYING file provided with the program. Following this notice may exist
a copyright and/or license notice that predates the release of Scribus 1.3.2
for which a new license (GPL+exception) is in place.
*/
/***************************************************************************
                              guidemanager.cpp
                             -------------------
    begin                : Fri Jan 30 2004
    copyright            : (C) 2004 by Alessandro Rimoldi
    copyright            : (C) by Franz Schmid
    e-mail               : http://www.ideale.ch/contact
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "scribus.h"
#include "selection.h"
#include "guidemanager.h"
#include "guidemanager.moc"
#include "page.h"
#include "units.h"
#include "commonstrings.h"
#include "pagestructs.h"

#include <qradiobutton.h>
#include <qlayout.h>
#include <qcursor.h>
#include <qlistview.h>
#include <qdialog.h>
#include <qvaluelist.h>
#include <qgroupbox.h>
#include <qlabel.h>
#include <qlistview.h>
#include <qpushbutton.h>
#include <qcheckbox.h>
#include <qtooltip.h>
#include <qhbuttongroup.h>


extern QPixmap loadIcon(QString nam);


int GuideListItem::compare(QListViewItem *i, int col, bool asc) const
{
	if (col == 0)
	{
		double d;
		d = text(col).toDouble() - i->text(col).toDouble();
		if (d > 0.0)
			return 1;
		return -1;
	}
	else
		return QListViewItem::compare(i, col, asc);
}


GuideManager::GuideManager(QWidget* parent) : QDialog(parent, "GuideManager", true, 0)
{
	setCaption( tr("Manage Guides"));
	setIcon(loadIcon("AppIcon.png"));

	/* Initialise the global variables */
	resetMarginsForPage();
	docUnitIndex = ScMW->doc->unitIndex();
	docUnitPrecision = unitGetPrecisionFromIndex(docUnitIndex);
	docUnitRatio = unitGetRatioFromIndex(docUnitIndex);
	docUnitDecimals = unitGetDecimalsFromIndex(docUnitIndex);
	suffix = unitGetSuffixFromIndex(docUnitIndex);

	/* Create the dialog elements */
	QHBoxLayout *guideManagerLayout = new QHBoxLayout(this, 11, 6, "guideManagerLayout");
	QVBoxLayout *mainWidgetsLayout = new QVBoxLayout(0, 11, 6, "mainWidgetsLayout");

	QHBoxLayout *Layout6 = new QHBoxLayout(0, 0, 6, "Layout6");

	QGroupBox *horGroup = new QGroupBox(this, "horGroup");
	horGroup->setTitle( tr("Horizontal Guides"));
	horGroup->setColumnLayout(0, Qt::Vertical);
	horGroup->layout()->setSpacing(6);
	horGroup->layout()->setMargin(11);
	QVBoxLayout *horGroupLayout = new QVBoxLayout(horGroup->layout());
	horGroupLayout->setAlignment(Qt::AlignTop);

	horList = new QListView(horGroup, "horList");
	horList->addColumn(tr("Guide"));
	horList->addColumn(tr("Unit"));
	horList->setMinimumSize(QSize(0, 150));
	horList->setSelectionMode(QListView::Extended);
	horList->setAllColumnsShowFocus(true);
	horList->setSorting(0);
	horGroupLayout->addWidget(horList);

	QHBoxLayout *Layout4 = new QHBoxLayout(0, 0, 6, "Layout4");

	TextLabel2 = new QLabel( tr("&Y-Pos:"), horGroup, "TextLabel2");
	Layout4->addWidget(TextLabel2);

	horSpin = new MSpinBox(0, locPageHeight, horGroup, 4);
	TextLabel2->setBuddy(horSpin);
	Layout4->addWidget(horSpin);

	horGroupLayout->addLayout(Layout4);

	QHBoxLayout *Layout3 = new QHBoxLayout(0, 0, 6, "Layout3");

	horSet = new QPushButton( tr( "&Add" ), horGroup, "horSet");
	horSet->setAutoDefault(false);
	Layout3->addWidget(horSet);

	horDel = new QPushButton( tr( "D&elete" ), horGroup, "horDel");
	horDel->setAutoDefault(false);
	Layout3->addWidget(horDel);

	horGroupLayout->addLayout(Layout3);

	Layout6->addWidget(horGroup);

	verGroup = new QGroupBox(this, "verGroup");
	verGroup->setTitle( tr("Vertical Guides"));
	verGroup->setColumnLayout(0, Qt::Vertical);
	verGroup->layout()->setSpacing(6);
	verGroup->layout()->setMargin(11);
	QVBoxLayout *verGroupLayout = new QVBoxLayout(verGroup->layout());
	verGroupLayout->setAlignment(Qt::AlignTop);

	verList = new QListView(verGroup, "verList");
	verList->addColumn(tr("Guide"));
	verList->addColumn(tr("Unit"));
	verList->setMinimumSize(QSize(0, 150));
	verList->setSorting(0);
	verList->setSelectionMode(QListView::Extended);
	verList->setAllColumnsShowFocus(true);
	verGroupLayout->addWidget(verList);

	QHBoxLayout *Layout2 = new QHBoxLayout(0, 0, 6, "Layout2");

	TextLabel1 = new QLabel( tr("&X-Pos:"), verGroup, "TextLabel1");
	Layout2->addWidget(TextLabel1);

	verSpin = new MSpinBox(0, locPageWidth, verGroup, 4);
	TextLabel1->setBuddy(verSpin);
	Layout2->addWidget(verSpin);

	verGroupLayout->addLayout(Layout2);

	QHBoxLayout *Layout1 = new QHBoxLayout(0, 0, 6, "Layout1");

	verSet = new QPushButton( tr( "A&dd" ), verGroup, "verSet");
	verSet->setAutoDefault(false);
	Layout1->addWidget(verSet);

	verDel = new QPushButton( tr( "De&lete" ), verGroup, "verDel");
	verDel->setAutoDefault(false);
	Layout1->addWidget(verDel);

	verGroupLayout->addLayout(Layout1);

	Layout6->addWidget(verGroup);

	mainWidgetsLayout->addLayout(Layout6);

	QHBoxLayout *Layout7 = new QHBoxLayout(0, 0, 6, "Layout7");

	// auto guides
	QGroupBox *horGroup2 = new QGroupBox(this, "horGroup");
	horGroup2->setTitle( tr("Rows and Columns - Automatic Guides"));
	horGroup2->setColumnLayout(0, Qt::Vertical);
	horGroup2->layout()->setSpacing(6);
	horGroup2->layout()->setMargin(11);
	QVBoxLayout *horGroupLayout2 = new QVBoxLayout(horGroup2->layout());
	horGroupLayout2->setAlignment(Qt::AlignTop);

	// auto guides basic
	QLabel *TextLabel8 = new QLabel( tr("&Rows:"), horGroup2, "TextLabel8");
	rowSpin = new QSpinBox(1, 100, 1, horGroup2, "rowSpin");
	TextLabel8->setBuddy(rowSpin);

	QLabel *TextLabel9 = new QLabel( tr("C&olumns:"), horGroup2, "TextLabel9");
	colSpin = new QSpinBox(1, 100, 1, horGroup2, "colSpin");
	TextLabel9->setBuddy(colSpin);

	QVBoxLayout *rcLayout = new QVBoxLayout(0, 0, 6, "rcLayout");
	rcLayout->addWidget(TextLabel8);
	rcLayout->addWidget(rowSpin);
	rcLayout->addWidget(TextLabel9);
	rcLayout->addWidget(colSpin);

	// auto guides gaps
	useRowGap = new QCheckBox( tr("Row &Gap"), horGroup2, "useRowGap");
	useRowGap->setChecked(false);
	rowGap = new MSpinBox(0, 100, horGroup2, 4);
	rowGap->setValue(0);
	rowGap->setEnabled(false);

	useColGap = new QCheckBox( tr("Colum&n Gap"), horGroup2, "useColGap");
	useColGap->setChecked(false);
	colGap = new MSpinBox(0, 100, horGroup2, 4);
	colGap->setValue(0);
	colGap->setEnabled(false);

	QVBoxLayout *rcGapLayout = new QVBoxLayout(0, 0, 6, "rcGapLayout");
	rcGapLayout->addWidget(useRowGap);
	rcGapLayout->addWidget(rowGap);
	rcGapLayout->addWidget(useColGap);
	rcGapLayout->addWidget(colGap);

	// auto guides formating
	QHBoxLayout *autoGuidesLayout = new QHBoxLayout(0, 0, 6, "autoGuidesLayout");
	autoGuidesLayout->addLayout(rcLayout);
	autoGuidesLayout->addLayout(rcGapLayout);

	QHBoxLayout *Layout10 = new QHBoxLayout(0, 0, 6, "Layout10");
	bGroup = new QHButtonGroup(horGroup2, "bGroup");
	bGroup->setFrameStyle(QFrame::NoFrame);
	QLabel *TextLabel10 = new QLabel( tr("Refer to:"), horGroup2, "TextLabel10");
	Layout10->addWidget(TextLabel10);
	QRadioButton *fPage = new QRadioButton( tr( "&Page" ), bGroup, "fpage");
	fPage->setChecked(true);
	(void) new QRadioButton( tr( "&Margins" ), bGroup, "fmargin");
	QRadioButton *fSelect = new QRadioButton( tr( "&Selection" ), bGroup, "fselect");
	fSelect->setEnabled(selected);
	Layout10->addWidget(bGroup);

	QSpacerItem* spacer2 = new QSpacerItem( 0, 0, QSizePolicy::Expanding, QSizePolicy::Minimum);
	Layout10->addItem(spacer2);

	Layout7->addWidget(horGroup2);
	horGroupLayout2->addLayout(autoGuidesLayout);
	horGroupLayout2->addLayout(Layout10);

	mainWidgetsLayout->addLayout(Layout7);

	QHBoxLayout *buttonLayout = new QHBoxLayout(0, 0, 6, "buttonLayout");
	QSpacerItem* spacer = new QSpacerItem(0, 0, QSizePolicy::Expanding, QSizePolicy::Minimum);
	buttonLayout->addItem(spacer);

	okButton = new QPushButton( CommonStrings::tr_OK, this, "okButton");
	okButton->setAutoDefault(false);
	cancelButton = new QPushButton( tr( "&Close" ), this, "cancelButton");
	cancelButton->setAutoDefault(false);
	cancelButton->setAccel(QKeySequence("Esc"));
	setButton = new QPushButton( tr("&Update"), this, "setButton");
	setButton->setAutoDefault(false);
	buttonLayout->addWidget(setButton);
	buttonLayout->addWidget(okButton);
	buttonLayout->addWidget(cancelButton);

	//mainWidgetsLayout->addLayout(Layout5);
	mainWidgetsLayout->addLayout(buttonLayout);

	// preview pixmap
	// prevMainLayout is here due the aligning with the others widgets
	QVBoxLayout *prevMainLayout = new QVBoxLayout(0, 11, 6, "prevMainLayout");
	QGroupBox *previewGBox = new QGroupBox(this, "previewGBox");
	previewGBox->setTitle(tr("Preview"));
	previewGBox->setColumnLayout(0, Qt::Vertical);
	previewGBox->layout()->setSpacing(6);
	previewGBox->layout()->setMargin(11);
	QVBoxLayout *previewGBoxLayout = new QVBoxLayout(previewGBox->layout());
	previewGBoxLayout->setAlignment(Qt::AlignTop);
	previewLabel = new QLabel(previewGBox, "previewLabel");
	previewGBoxLayout->addWidget(previewLabel);
	prevMainLayout->addWidget(previewGBox);

	//QHBoxLayout *Layout5 = new QHBoxLayout(0, 0, 6, "Layout5");
	lockedCheckBox = new QCheckBox( tr( "&Lock Guides" ), this, "lockedCheckBox");
	lockedCheckBox->setChecked(ScMW->doc->GuideLock);
	prevMainLayout->addWidget(lockedCheckBox);

	allPages = new QCheckBox(tr("&Apply to All Pages"), this, "allPages");
	allPages->setChecked(false);
	prevMainLayout->addWidget(allPages);
	QSpacerItem* spacer3 = new QSpacerItem( 0, 0, QSizePolicy::Minimum, QSizePolicy::Expanding);
	prevMainLayout->addItem(spacer3);

	guideManagerLayout->addLayout(mainWidgetsLayout);
	guideManagerLayout->addLayout(prevMainLayout);

	// set current guides
	setGuidesFromList(horList, ScMW->doc->currentPage->YGuides);
	setGuidesFromList(verList, ScMW->doc->currentPage->XGuides);
	unitChange();
	slotDrawPreview();

	//tooltips
	QToolTip::add( setButton, "<qt>" + tr("Set the guides in document. Guide manager is still opened but the changes are persistant", "guide manager") + "</qt>");

	// Create signals and slots connections
	connect(okButton, SIGNAL(clicked()), this, SLOT(commitChanges()));
	connect(setButton, SIGNAL(clicked()), this, SLOT(commitEditChanges()));
	connect(cancelButton, SIGNAL(clicked()), this, SLOT(reject()));
	connect(horSet, SIGNAL(clicked()), this, SLOT(AddHorVal()));
	connect(horDel, SIGNAL(clicked()), this, SLOT(DelHorVal()));
	connect(horSpin, SIGNAL(valueChanged(int)), this, SLOT(ChangeHorVal()));
	connect(horList, SIGNAL(currentChanged(QListViewItem*)), this, SLOT(horList_currentChanged(QListViewItem*)));
	connect(verSet, SIGNAL(clicked()), this, SLOT(AddVerVal()));
	connect(verDel, SIGNAL(clicked()), this, SLOT(DelVerVal()));
	connect(verSpin, SIGNAL(valueChanged(int)), this, SLOT(ChangeVerVal()));
	connect(verList, SIGNAL(currentChanged(QListViewItem*)), this, SLOT(verList_currentChanged(QListViewItem*)));
	connect(useRowGap, SIGNAL(toggled(bool)), this, SLOT(useRowGap_clicked(bool)));
	connect(useColGap, SIGNAL(toggled(bool)), this, SLOT(useColGap_clicked(bool)));
	connect(this, SIGNAL(guidesChanged()), this, SLOT(slotDrawPreview()));
	connect(rowSpin, SIGNAL(valueChanged(int)), this, SLOT(slotDrawPreview()));
	connect(colSpin, SIGNAL(valueChanged(int)), this, SLOT(slotDrawPreview()));
	connect(rowGap, SIGNAL(valueChanged(int)), this, SLOT(slotDrawPreview()));
	connect(colGap, SIGNAL(valueChanged(int)), this, SLOT(slotDrawPreview()));
	connect(bGroup, SIGNAL(clicked(int)), this, SLOT(slotDrawPreview()));
}

GuideManager::~GuideManager()
{
	ScMW->mainWindowStatusLabel->setText(QString::null);
}

bool GuideManager::deleteValueFormList(QListView *list)
{
	/* previous item pointer to ensure that ++it
	runs before item goes deleted */
	QListViewItem *itemToDelete;
	QListViewItemIterator it(list, QListViewItemIterator::Selected);
	while (it.current())
	{
		itemToDelete = it.current();
		++it;
		if (itemToDelete)
		{
			list->takeItem(itemToDelete);
			delete itemToDelete;
		}
	}
	emit guidesChanged();
	return true;
}

void GuideManager::DelHorVal()
{
	deleteValueFormList(horList);
}

void GuideManager::DelVerVal()
{
	deleteValueFormList(verList);
}

bool GuideManager::addValueToList(QListView *list, MSpinBox *spin)
{
	QString tmp;
	tmp = tmp.setNum(0.0, 'f', docUnitPrecision);
	// no duplications
	if (list->findItem(tmp, 0) != 0)
	{
		ScMW->mainWindowStatusLabel->setText(tr("There is empty (0.0) guide already"));
		return false;
	}
	QListViewItem *item = new GuideListItem(list, tmp, suffix);
	list->insertItem(item);
	list->setCurrentItem(item);
	list->clearSelection();
	list->setSelected(item, true);
	spin->setFocus();
	spin->selectAll();
	emit guidesChanged();
	return true;
}

void GuideManager::AddHorVal()
{
	addValueToList(horList, horSpin);

}

void GuideManager::AddVerVal()
{
	addValueToList(verList, verSpin);
}

void GuideManager::resetMarginsForPage()
{
	locPageWidth = ScMW->doc->currentPage->width();
	locPageHeight = ScMW->doc->currentPage->height();
	// whatif selection settings
	FPoint selectionTopLeft = FPoint(0, 0);
	FPoint selectionBottomRight = FPoint(0, 0);

	int docSelectionCount = ScMW->doc->m_Selection->count();
	// multiselection
	if (docSelectionCount > 1)
	{
		selectionTopLeft.setXY(ScMW->view->GroupX - ScMW->doc->currentPage->xOffset(),
							   ScMW->view->GroupY - ScMW->doc->currentPage->yOffset());
		selectionBottomRight.setXY(ScMW->view->GroupW,
								   ScMW->view->GroupH);
	}
	// only one item selected
	else if (docSelectionCount == 1)
	{
		PageItem *currItem = ScMW->doc->m_Selection->itemAt(0);
		selectionTopLeft.setXY(currItem->xPos() - ScMW->doc->currentPage->xOffset(),
							   currItem->yPos() - ScMW->doc->currentPage->yOffset());
		selectionBottomRight.setXY(currItem->width(), currItem->height());
	}

	selected = true;
	if (selectionBottomRight != FPoint(0, 0))
	{
		gy = selectionTopLeft.y();
		gx = selectionTopLeft.x();
		gw = selectionBottomRight.x();
		gh = selectionBottomRight.y();
	}
	else selected = false;

	locTop = ScMW->doc->pageMargins.Top;
	locBottom = ScMW->doc->pageMargins.Bottom;

	PageLocation pageLocation = ScMW->doc->locationOfPage(ScMW->doc->currentPageNumber());
	switch (pageLocation)
	{
		case MiddlePage :
			locLeft = ScMW->doc->pageMargins.Left;
			locRight = ScMW->doc->pageMargins.Left;
			break;
		case LeftPage:
			locLeft = ScMW->doc->pageMargins.Right;
			locRight = ScMW->doc->pageMargins.Left;
			break;
		case RightPage:
			locRight = ScMW->doc->pageMargins.Right;
			locLeft = ScMW->doc->pageMargins.Left;
			break;
		default:
			locRight = 0;
			locLeft = 0;
	}
}

void GuideManager::addRows()
{
	if (allPages->isChecked() && rowSpin->value() > 0)
		horList->clear();
	setGuidesFromList(horList, getAutoRows());
}

QValueList<double> GuideManager::getAutoRows()
{
	resetMarginsForPage();
	int n = QString(rowSpin->text()).toInt();
	double offset = 0;
	double newPageHeight = locPageHeight;

	if (bGroup->selectedId() == 1)
	{
		newPageHeight = locPageHeight - locTop - locBottom;
		offset = locTop;
	}
	else if (bGroup->selectedId() == 2)
	{
		offset = gy;
		newPageHeight = gh;
	}
	QValueList<double> values;
	double gapValue;
	double rowSize;
	if (useRowGap->isChecked())
	{
		gapValue = value2pts(rowGap->value(), ScMW->doc->unitIndex());
		rowSize = (newPageHeight - (n - 1) * gapValue) / n;
	}
	else
		rowSize = newPageHeight / n;
	for (int i = 1, gapCount = 0; i < n; ++i)
	{
		if (useRowGap->isChecked())
		{
			values.append(offset + i * rowSize + gapCount * gapValue);
			++gapCount;
			values.append(offset + i * rowSize + gapCount * gapValue);
		}
		else
			values.append(offset + rowSize * i);
	}
	return values;
}

void GuideManager::addCols()
{
	if (allPages->isChecked() && colSpin->value() > 0)
		verList->clear();
	setGuidesFromList(verList, getAutoCols());
}

QValueList<double> GuideManager::getAutoCols()
{
	resetMarginsForPage();
	int n = QString(colSpin->text()).toInt();
	double offset = 0;
	double newPageWidth = locPageWidth;

	if (bGroup->selectedId() == 1)
	{
		newPageWidth = locPageWidth - locLeft - locRight;
		offset = locLeft;
	}
	else if (bGroup->selectedId() == 2)
	{
		offset = gx;
		newPageWidth = gw;
	}

	QValueList<double> values;
	double gapValue;
	double columnSize;
	if (useColGap->isChecked())
	{
		gapValue = value2pts(colGap->value(), ScMW->doc->unitIndex());
		columnSize = (newPageWidth - (n - 1) * gapValue) / n;
	}
	else
		columnSize = newPageWidth / n;
	for (int i = 1, gapCount = 0; i < n; ++i)
	{
		if (useColGap->isChecked())
		{
			values.append(offset + i * columnSize + gapCount * gapValue);
			++gapCount;
			values.append(offset + i * columnSize + gapCount * gapValue);
		}
		else
			values.append(offset + columnSize * i);
	}
	return values;
}

void GuideManager::ChangeHorVal()
{
	QListViewItem *item = horList->currentItem();
	if (item == 0)
		return;
	QString tmp;
	tmp = tmp.setNum(horSpin->value(), 'f', docUnitPrecision);
	item->setText(0, tmp);
	emit guidesChanged();
}

void GuideManager::ChangeVerVal()
{
	QListViewItem *item = verList->currentItem();
	if (item == 0)
		return;
	QString tmp;
	tmp = tmp.setNum(verSpin->value(), 'f', docUnitPrecision);
	item->setText(0, tmp);
	emit guidesChanged();
}

void GuideManager::unitChange()
{
	horSpin->setSuffix(suffix);
	verSpin->setSuffix(suffix);
	rowGap->setSuffix(suffix);
	colGap->setSuffix(suffix);
	horSpin->setDecimals(docUnitDecimals);
	verSpin->setDecimals(docUnitDecimals);
	rowGap->setDecimals(docUnitDecimals);
	colGap->setDecimals(docUnitDecimals);
}

void GuideManager::refreshDoc()
{
	if (rowSpin->value() > 1)
		addRows();
	if (colSpin->value() > 1)
		addCols();
	QValueList<double> tmp = getValuesFromList(verList);
	ScMW->doc->currentPage->addXGuides(tmp);
	tmp = getValuesFromList(horList);
	ScMW->doc->currentPage->addYGuides(tmp);
	ScMW->doc->lockGuides(lockedCheckBox->isChecked());
	ScMW->view->DrawNew();
}

void GuideManager::refreshWholeDoc()
{
	int origPage = ScMW->doc->currentPage->pageNr();

	for (uint i = 0; i < ScMW->doc->Pages->count(); ++i)
	{
		ScMW->view->GotoPage(i);
		refreshDoc();
	}
	ScMW->view->GotoPage(origPage);
	ScMW->view->DrawNew();
}

void GuideManager::useRowGap_clicked(bool state)
{
	rowGap->setEnabled(state);
	if (state)
		rowGap->setFocus();
}

void GuideManager::useColGap_clicked(bool state)
{
	colGap->setEnabled(state);
	if (state)
		colGap->setFocus();
}

void GuideManager::commitChanges()
{
	commitEditChanges();
	return accept();
}

void GuideManager::commitEditChanges()
{
	qApp->setOverrideCursor(QCursor(waitCursor), true);
	if (allPages->isChecked())
		refreshWholeDoc();
	else
		refreshDoc();
	QApplication::restoreOverrideCursor();
}

void GuideManager::setGuidesFromList(QListView *w, QValueList<double> guides)
{
	QValueList<double>::iterator it;
	QString tmp;

	for (it = guides.begin(); it != guides.end(); ++it)
	{
		tmp = tmp.setNum((*it) * docUnitRatio , 'f', docUnitPrecision);
		// no insert for duplicates
		if (w->findItem(tmp, 0) != 0)
			continue;
		QListViewItem *item = new GuideListItem(w, tmp, suffix);
		w->insertItem(item);
	}
	w->setCurrentItem(w->firstChild());
	w->setSelected(w->firstChild(), true);
	emit guidesChanged();
}

QValueList<double> GuideManager::getValuesFromList(QListView *w)
{
	QValueList<double> ret;
	QListViewItemIterator it(w);

	while (it.current())
	{
		ret.append(it.current()->text(0).toDouble() / docUnitRatio);
		++it;
	}
	return ret;
}

void GuideManager::verList_currentChanged(QListViewItem *item)
{
	double val;
	if (!item)
		val = 0.0;
	else
		val = item->text(0).toDouble();
	verSpin->setValue(val);
	emit guidesChanged();
}

void GuideManager::horList_currentChanged(QListViewItem *item)
{
	double val;
	if (!item)
		val = 0.0;
	else
		val = item->text(0).toDouble();
	horSpin->setValue(val);
	emit guidesChanged();
}

void GuideManager::slotDrawPreview()
{
	int size = 200; // height of the preview pixmap
	int x, y; // helper values. original guide size to smaller one
	double val; // position of the current guide (red one)
	QPixmap pm; // paint device for preview
	QPainter *p = new QPainter();
	QValueList<double> vg = getValuesFromList(verList); // vert. g.
	QValueList<double> hg = getValuesFromList(horList); // hor. g.
	QValueList<double>::iterator it; // iterator for guides lists
	// page size on pts
	double pagew = ScMW->doc->currentPage->width() * docUnitRatio;
	double pageh = ScMW->doc->currentPage->height() * docUnitRatio;

	vg += getAutoCols();
	hg += getAutoRows();
	//! \note Sorting is a must here for GUI
	horList->sort();
	verList->sort();
	// load the page only at the first time
	if (previewPixmap.isNull())
		previewPixmap = ScMW->view->PageToPixmap(ScMW->doc->currentPageNumber(), size);

	pm = previewPixmap;
	p->begin(&pm);
	p->setPen(QPen(ScMW->doc->guidesSettings.guideColor, 1, Qt::SolidLine));
	// all guides - paint it standard
	for (it = vg.begin(); it != vg.end(); ++it)
	{
		x = (int)(pm.width() * (*it) * docUnitRatio / pagew);
		p->drawLine(x, 0, x, pm.height());
	}
	for (it = hg.begin(); it != hg.end(); ++it)
	{
		y = (int)(pm.height() * (*it) * docUnitRatio / pageh);
		p->drawLine(0, y, pm.width(), y);
	}
	// current guide - paint it bold and red...
	p->setPen(QPen(QColor(200, 0, 0), 2, Qt::SolidLine));
	val = verSpin->value(); // val is docUnitRatio'ned already
	if (val > 0.0)
	{
		x = (int)(pm.width() * val / pagew);
		p->drawLine(x, 0, x, pm.height());
	}
	val = horSpin->value();
	if (val > 0.0)
	{
		y = (int)(pm.height() * val / pageh);
		p->drawLine(0, y, pm.width(), y);
	}
	p->end();
	previewLabel->setPixmap(pm);
	delete p;
}