/***************************************************************************
 *   Copyright (C) 2005 by Niklas Knutsson                                 *
 *   nq@altern.org                                                         *
 *                                                                         *
 *   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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include "qalculateplotdialog.h"
#include "qalculateexpressionedit.h"

#include <klineedit.h>
#include <kpushbutton.h>
#include <kcombobox.h>
#include <tqlabel.h>
#include <klocale.h>
#include <tqcheckbox.h>
#include <tqradiobutton.h>
#include <tqbuttongroup.h>
#include <tqspinbox.h>
#include <kmessagebox.h>
#include <tqlayout.h>
#include <ktextedit.h>
#include <klistview.h>
#include <kdeversion.h>
#if KDE_VERSION_MAJOR < 4 && KDE_VERSION_MINOR < 2
#include <tqtabwidget.h>
#else
#include <ktabwidget.h>
#endif
#include <kfiledialog.h>
#include <kapplication.h>
#include <kstdguiitem.h>

extern PlotLegendPlacement default_plot_legend_placement;
extern bool default_plot_display_grid;
extern bool default_plot_full_border;
extern TQString default_plot_min;
extern TQString default_plot_max;
extern TQString default_plot_step;
extern int default_plot_sampling_rate;
extern bool default_plot_use_sampling_rate;
extern bool default_plot_rows;
extern int default_plot_type;
extern PlotStyle default_plot_style;
extern PlotSmoothing default_plot_smoothing;
extern TQString default_plot_variable;
extern bool default_plot_color;
extern bool enable_plot_expression_completion;

extern EvaluationOptions evalops;

QalculatePlotDialog::QalculatePlotDialog(TQWidget *parent, const char *name) : KDialogBase(parent, name, false, i18n("Plot"), User1 | Close | Help, Close, false, KStdGuiItem::save()) {

	actionButton(Close)->setAutoDefault(false);
	actionButton(Close)->setDefault(false);
	actionButton(User1)->setAutoDefault(false);
	actionButton(User1)->setDefault(false);
	
	actionButton(User1)->setEnabled(false);

#if KDE_VERSION_MAJOR < 4 && KDE_VERSION_MINOR < 2
	tabs = new TQTabWidget(this);
#else
	tabs = new KTabWidget(this);
#endif
	setMainWidget(tabs);
	TQWidget *page1 = new TQWidget(this);
	TQWidget *page2 = new TQWidget(this);
	TQWidget *page3 = new TQWidget(this);
	tabs->addTab(page1, i18n("Data"));
	tabs->addTab(page2, i18n("Function Range"));
	tabs->addTab(page3, i18n("Appearance"));
	TQGridLayout *grid = new TQGridLayout(page1, 1, 1, spacingHint());
	grid->addWidget(new TQLabel(i18n("Title:"), page1), 0, 0);
	seriesTitleEdit = new KLineEdit(page1);
	grid->addWidget(seriesTitleEdit, 0, 1);
	grid->addWidget(new TQLabel(i18n("Expression:"), page1), 1, 0);
	expressionEdit = new QalculateExpressionEdit(false, page1);
	if(!enable_plot_expression_completion) expressionEdit->disableCompletion();
	expressionEdit->updateCompletion();
	grid->addWidget(expressionEdit, 1, 1);
	TQHBoxLayout *hbox = new TQHBoxLayout(0, 0, spacingHint());
	grid->addMultiCellLayout(hbox, 2, 2, 0, 1);
	hbox->addItem(new TQSpacerItem(0, 0, TQSizePolicy::Expanding, TQSizePolicy::Minimum));
	typeGroup = new TQButtonGroup();
	functionButton = new TQRadioButton(i18n("Function"), page1);
	typeGroup->insert(functionButton, 0);
	hbox->addWidget(functionButton);
	vectorMatrixButton = new TQRadioButton(i18n("Vector/matrix"), page1);
	typeGroup->insert(vectorMatrixButton, 1);
	hbox->addWidget(vectorMatrixButton);
	pairedMatrixButton = new TQRadioButton(i18n("Paired matrix"), page1);
	typeGroup->insert(pairedMatrixButton, 2);
	hbox->addWidget(pairedMatrixButton);
	rowsButton = new TQCheckBox(i18n("Rows"), page1);
	hbox->addWidget(rowsButton);
	xVariableLabel = new TQLabel(i18n("X variable:"), page1);
	grid->addWidget(xVariableLabel, 3, 0);
	xVariableEdit = new KLineEdit(page1);
	grid->addWidget(xVariableEdit, 3, 1);
	grid->addWidget(new TQLabel(i18n("Style:"), page1), 4, 0);
	styleCombo = new KComboBox(page1);
	styleCombo->insertItem(i18n("Line"));
	styleCombo->insertItem(i18n("Points"));
	styleCombo->insertItem(i18n("Line with points"));
	styleCombo->insertItem(i18n("Boxes/bars"));
	styleCombo->insertItem(i18n("Histogram"));
	styleCombo->insertItem(i18n("Steps"));
	styleCombo->insertItem(i18n("Candlesticks"));
	styleCombo->insertItem(i18n("Dots"));
	grid->addWidget(styleCombo, 4, 1);
	grid->addWidget(new TQLabel(i18n("Smoothing:"), page1), 5, 0);
	smoothingCombo = new KComboBox(page1);
	smoothingCombo->insertItem(i18n("None"));
	smoothingCombo->insertItem(i18n("Monotonic"));
	smoothingCombo->insertItem(i18n("Natural cubic splines"));
	smoothingCombo->insertItem(i18n("Bezier"));
	smoothingCombo->insertItem(i18n("Bezier (monotonic)"));
	grid->addWidget(smoothingCombo, 5, 1);
	grid->addWidget(new TQLabel(i18n("Y-axis:"), page1), 6, 0);
	hbox = new TQHBoxLayout(0, 0, spacingHint());
	grid->addLayout(hbox, 6, 1);
	TQButtonGroup *group = new TQButtonGroup();
	primaryButton = new TQRadioButton(i18n("Primary"), page1);
	group->insert(primaryButton, 0);
	hbox->addWidget(primaryButton);
	secondaryButton = new TQRadioButton(i18n("Secondary"), page1);
	group->insert(secondaryButton, 1);
	hbox->addWidget(secondaryButton);
	hbox->addItem(new TQSpacerItem(0, 0, TQSizePolicy::Expanding, TQSizePolicy::Minimum));
	hbox = new TQHBoxLayout(0, 0, spacingHint());
	grid->addMultiCellLayout(hbox, 7, 7, 0, 1);
	hbox->addItem(new TQSpacerItem(0, 0, TQSizePolicy::Expanding, TQSizePolicy::Minimum));
	addButton = new TQPushButton(i18n("Add"), page1);
	hbox->addWidget(addButton);
	modifyButton = new TQPushButton(i18n("Modify"), page1);
	hbox->addWidget(modifyButton);
	removeButton = new TQPushButton(i18n("Remove"), page1);
	hbox->addWidget(removeButton);
	seriesView = new KListView(page1);
	seriesView->addColumn(i18n("Title"));
	seriesView->addColumn(i18n("Expression"));
	seriesView->setRootIsDecorated(false);
	seriesView->setItemsRenameable(true);
	seriesView->setRenameable(0, true);
	seriesView->setRenameable(1, true);
	seriesView->setItemsMovable(true);
	seriesView->setSorting(-1);
	grid->addMultiCellWidget(seriesView, 8, 8, 0, 1);

	grid = new TQGridLayout(page2, 1, 1, spacingHint());
	grid->addWidget(new TQLabel(i18n("Min:"), page2), 0, 0);
	minEdit = new KLineEdit(page2);
	grid->addWidget(minEdit, 0, 1);
	grid->addWidget(new TQLabel(i18n("Max:"), page2), 1, 0);
	maxEdit = new KLineEdit(page2);
	grid->addWidget(maxEdit, 1, 1);
	rangeGroup = new TQButtonGroup();
	samplingRateButton = new TQRadioButton(i18n("Sampling rate:"), page2);
	rangeGroup->insert(samplingRateButton, 0);
	grid->addWidget(samplingRateButton, 2, 0);
	samplingRateBox = new TQSpinBox(1, 10000, 10, page2);
	grid->addWidget(samplingRateBox, 2, 1);
	stepSizeButton = new TQRadioButton(i18n("Step size:"), page2);
	rangeGroup->insert(stepSizeButton, 1);
	grid->addWidget(stepSizeButton, 3, 0);
	stepSizeEdit = new KLineEdit(page2);
	grid->addWidget(stepSizeEdit, 3, 1);
	hbox = new TQHBoxLayout(0, 0, spacingHint());
	grid->addMultiCellLayout(hbox, 4, 4, 0, 1);
	hbox->addItem(new TQSpacerItem(0, 0, TQSizePolicy::Expanding, TQSizePolicy::Minimum));
	applyRangeButton = new KPushButton(KStdGuiItem::apply(), page2);
	hbox->addWidget(applyRangeButton);
	grid->addItem(new TQSpacerItem(0, 0, TQSizePolicy::Minimum, TQSizePolicy::Expanding), 5, 0);

	grid = new TQGridLayout(page3, 1, 1, spacingHint());
	grid->addWidget(new TQLabel(i18n("Title:"), page3), 0, 0);
	titleEdit = new KLineEdit(page3);
	grid->addWidget(titleEdit, 0, 1);
	hbox = new TQHBoxLayout(0, 0, spacingHint());
	grid->addMultiCellLayout(hbox, 1, 1, 0, 1);
	gridButton = new TQCheckBox(i18n("Display grid"), page3);
	hbox->addWidget(gridButton);
	fullBorderButton = new TQCheckBox(i18n("Display full border"), page3);
	hbox->addWidget(fullBorderButton);
	hbox->addItem(new TQSpacerItem(0, 0, TQSizePolicy::Expanding, TQSizePolicy::Minimum));
	logXButton = new TQCheckBox(i18n("Logarithmic x scale:"), page3);
	grid->addWidget(logXButton, 2, 0);
	logXBox = new TQSpinBox(2, 100, 1, page3);
	grid->addWidget(logXBox, 2, 1);
	logYButton = new TQCheckBox(i18n("Logarithmic y scale:"), page3);
	grid->addWidget(logYButton, 3, 0);
	logYBox = new TQSpinBox(2, 100, 1, page3);
	grid->addWidget(logYBox, 3, 1);
	grid->addWidget(new TQLabel(i18n("X-axis label:"), page3), 4, 0);
	xLabelEdit = new KLineEdit(page3);
	grid->addWidget(xLabelEdit, 4, 1);
	grid->addWidget(new TQLabel(i18n("Y-axis label:"), page3), 5, 0);
	yLabelEdit = new KLineEdit(page3);
	grid->addWidget(yLabelEdit, 5, 1);
	grid->addWidget(new TQLabel(i18n("Color display:"), page3), 6, 0);
	hbox = new TQHBoxLayout(0, 0, spacingHint());
	grid->addLayout(hbox, 6, 1);
	group = new TQButtonGroup();
	colorButton = new TQRadioButton(i18n("Color"), page3);
	group->insert(colorButton, 0);
	hbox->addWidget(colorButton);
	monochromeButton = new TQRadioButton(i18n("Monochrome"), page3);
	group->insert(monochromeButton, 1);
	hbox->addWidget(monochromeButton);
	hbox->addItem(new TQSpacerItem(0, 0, TQSizePolicy::Expanding, TQSizePolicy::Minimum));
	grid->addWidget(new TQLabel(i18n("Legend placement:"), page3), 7, 0);
	legendPlacementCombo = new KComboBox(page3);
	legendPlacementCombo->insertItem(i18n("Hide"));
	legendPlacementCombo->insertItem(i18n("Top-left"));
	legendPlacementCombo->insertItem(i18n("Top-right"));
	legendPlacementCombo->insertItem(i18n("Bottom-left"));
	legendPlacementCombo->insertItem(i18n("Bottom-right"));
	legendPlacementCombo->insertItem(i18n("Below"));
	legendPlacementCombo->insertItem(i18n("Outside"));
	grid->addWidget(legendPlacementCombo, 7, 1);
	hbox = new TQHBoxLayout(0, 0, spacingHint());
	grid->addMultiCellLayout(hbox, 8, 8, 0, 1);
	hbox->addItem(new TQSpacerItem(0, 0, TQSizePolicy::Expanding, TQSizePolicy::Minimum));
	applyAppearanceButton = new KPushButton(KStdGuiItem::apply(), page3);
	hbox->addWidget(applyAppearanceButton);
	grid->addItem(new TQSpacerItem(0, 0, TQSizePolicy::Minimum, TQSizePolicy::Expanding), 9, 0);

	primaryButton->setChecked(true);
	modifyButton->setEnabled(false);
	removeButton->setEnabled(false);
	gridButton->setChecked(default_plot_display_grid);
	fullBorderButton->setChecked(default_plot_full_border);
	rowsButton->setChecked(default_plot_rows);
	colorButton->setChecked(default_plot_color);
	monochromeButton->setChecked(!default_plot_color);
	minEdit->setText(default_plot_min);
	maxEdit->setText(default_plot_max);
	stepSizeEdit->setText(default_plot_step);
	xVariableEdit->setText(default_plot_variable);
	samplingRateButton->setChecked(default_plot_use_sampling_rate);
	samplingRateBox->setEnabled(default_plot_use_sampling_rate);
	stepSizeButton->setChecked(!default_plot_use_sampling_rate);
	stepSizeEdit->setEnabled(!default_plot_use_sampling_rate);
	logXBox->setEnabled(false);
	logYBox->setEnabled(false);
	switch(default_plot_type) {
		case 1: {vectorMatrixButton->setChecked(true); break;}
		case 2: {pairedMatrixButton->setChecked(true); break;}
		default: {functionButton->setChecked(true);}
	}
	rowsButton->setEnabled(default_plot_type == 1 || default_plot_type == 2);
	xVariableEdit->setEnabled(default_plot_type != 1 && default_plot_type != 2);
	xVariableLabel->setEnabled(default_plot_type != 1 && default_plot_type != 2);
	switch(default_plot_legend_placement) {
		case PLOT_LEGEND_NONE: {legendPlacementCombo->setCurrentItem(0); break;}
		case PLOT_LEGEND_TOP_LEFT: {legendPlacementCombo->setCurrentItem(1); break;}
		case PLOT_LEGEND_TOP_RIGHT: {legendPlacementCombo->setCurrentItem(2); break;}
		case PLOT_LEGEND_BOTTOM_LEFT: {legendPlacementCombo->setCurrentItem(3); break;}
		case PLOT_LEGEND_BOTTOM_RIGHT: {legendPlacementCombo->setCurrentItem(4); break;}
		case PLOT_LEGEND_BELOW: {legendPlacementCombo->setCurrentItem(5); break;}
		case PLOT_LEGEND_OUTSIDE: {legendPlacementCombo->setCurrentItem(6); break;}
	}
	switch(default_plot_smoothing) {
		case PLOT_SMOOTHING_NONE: {smoothingCombo->setCurrentItem(0); break;}
		case PLOT_SMOOTHING_UNIQUE: {smoothingCombo->setCurrentItem(1); break;}
		case PLOT_SMOOTHING_CSPLINES: {smoothingCombo->setCurrentItem(2); break;}
		case PLOT_SMOOTHING_BEZIER: {smoothingCombo->setCurrentItem(3); break;}
		case PLOT_SMOOTHING_SBEZIER: {smoothingCombo->setCurrentItem(4); break;}
	}
	switch(default_plot_style) {
		case PLOT_STYLE_LINES: {styleCombo->setCurrentItem(0); break;}
		case PLOT_STYLE_POINTS: {styleCombo->setCurrentItem(1); break;}
		case PLOT_STYLE_POINTS_LINES: {styleCombo->setCurrentItem(2); break;}
		case PLOT_STYLE_BOXES: {styleCombo->setCurrentItem(3); break;}
		case PLOT_STYLE_HISTOGRAM: {styleCombo->setCurrentItem(4); break;}
		case PLOT_STYLE_STEPS: {styleCombo->setCurrentItem(5); break;}
		case PLOT_STYLE_CANDLESTICKS: {styleCombo->setCurrentItem(6); break;}
		case PLOT_STYLE_DOTS: {styleCombo->setCurrentItem(7); break;}
	}
	samplingRateBox->setValue(default_plot_sampling_rate);

	seriesTitleEdit->setFocus();

	connect(seriesTitleEdit, SIGNAL(returnPressed()), expressionEdit, SLOT(setFocus()));
	connect(expressionEdit, SIGNAL(returnPressed()), this, SLOT(expressionActivated()));
	connect(typeGroup, SIGNAL(clicked(int)), this, SLOT(typeChanged(int)));
	connect(rangeGroup, SIGNAL(clicked(int)), this, SLOT(rangeTypeChanged(int)));
	connect(logXButton, SIGNAL(toggled(bool)), logXBox, SLOT(setEnabled(bool)));
	connect(logYButton, SIGNAL(toggled(bool)), logYBox, SLOT(setEnabled(bool)));
	connect(applyRangeButton, SIGNAL(clicked()), this, SLOT(applyRange()));
	connect(applyAppearanceButton, SIGNAL(clicked()), this, SLOT(applyAppearance()));
	connect(seriesView, SIGNAL(selectionChanged()), this, SLOT(seriesSelected()));
	connect(seriesView, SIGNAL(itemRenamed(TQListViewItem*, const TQString&, int)), this, SLOT(seriesItemRenamed(TQListViewItem*, const TQString&, int)));
	connect(addButton, SIGNAL(clicked()), this, SLOT(addSeries()));
	connect(modifyButton, SIGNAL(clicked()), this, SLOT(modifySeries()));
	connect(removeButton, SIGNAL(clicked()), this, SLOT(removeSeries()));
	connect(this, SIGNAL(user1Clicked()), this, SLOT(savePlot()));
	connect(this, SIGNAL(finished()), this, SLOT(onClosing()));
	
}

QalculatePlotDialog::~QalculatePlotDialog() {}

void QalculatePlotDialog::slotHelp() {
	KApplication::kApplication()->invokeHelp("qalculate-plotting");
}

void QalculatePlotDialog::saveMode() {

	enable_plot_expression_completion = expressionEdit->completionEnabled();
	default_plot_display_grid = gridButton->isChecked();
	default_plot_full_border = fullBorderButton->isChecked();
	default_plot_rows = rowsButton->isChecked();
	default_plot_color = colorButton->isChecked();
	default_plot_min = minEdit->text().ascii();
	default_plot_max = maxEdit->text().ascii();
	default_plot_step = stepSizeEdit->text().ascii();
	default_plot_variable = xVariableEdit->text().ascii();
	default_plot_use_sampling_rate = samplingRateButton->isChecked();
	if(vectorMatrixButton->isChecked()) {
		default_plot_type = 1;
	} else if(pairedMatrixButton->isChecked()) {
		default_plot_type = 2;
	} else {
		default_plot_type = 0;
	}
	switch(legendPlacementCombo->currentItem()) {
		case 0: {default_plot_legend_placement = PLOT_LEGEND_NONE; break;}
		case 1: {default_plot_legend_placement = PLOT_LEGEND_TOP_LEFT; break;}
		case 2: {default_plot_legend_placement = PLOT_LEGEND_TOP_RIGHT; break;}
		case 3: {default_plot_legend_placement = PLOT_LEGEND_BOTTOM_LEFT; break;}
		case 4: {default_plot_legend_placement = PLOT_LEGEND_BOTTOM_RIGHT; break;}
		case 5: {default_plot_legend_placement = PLOT_LEGEND_BELOW; break;}
		case 6: {default_plot_legend_placement = PLOT_LEGEND_OUTSIDE; break;}
	}
	switch(smoothingCombo->currentItem()) {
		case 0: {default_plot_smoothing = PLOT_SMOOTHING_NONE; break;}
		case 1: {default_plot_smoothing = PLOT_SMOOTHING_UNIQUE; break;}
		case 2: {default_plot_smoothing = PLOT_SMOOTHING_CSPLINES; break;}
		case 3: {default_plot_smoothing = PLOT_SMOOTHING_BEZIER; break;}
		case 4: {default_plot_smoothing = PLOT_SMOOTHING_SBEZIER; break;}
	}
	switch(styleCombo->currentItem()) {
		case 0: {default_plot_style = PLOT_STYLE_LINES; break;}
		case 1: {default_plot_style = PLOT_STYLE_POINTS; break;}
		case 2: {default_plot_style = PLOT_STYLE_POINTS_LINES; break;}
		case 3: {default_plot_style = PLOT_STYLE_BOXES; break;}
		case 4: {default_plot_style = PLOT_STYLE_HISTOGRAM; break;}
		case 5: {default_plot_style = PLOT_STYLE_STEPS; break;}
		case 6: {default_plot_style = PLOT_STYLE_CANDLESTICKS; break;}
		case 7: {default_plot_style = PLOT_STYLE_DOTS; break;}
	}
	default_plot_sampling_rate = samplingRateBox->value();
}
void QalculatePlotDialog::onClosing() {

	tabs->setCurrentPage(0);
	modifyButton->setEnabled(false);
	removeButton->setEnabled(false);
	actionButton(User1)->setEnabled(false);

	TQListViewItemIterator it(seriesView);
	while(it.current()) {
		MathStructure *y_vector = itemYVector[it.current()], *x_vector = itemXVector[it.current()];
		if(y_vector) delete y_vector;
		if(x_vector) delete x_vector;
		++it;
	}
	itemStyle.clear();
	itemType.clear();
	itemAxis.clear();
	itemSmoothing.clear();
	itemRows.clear();
	itemXVector.clear();
	itemYVector.clear();
	itemXVariable.clear();
	seriesView->clear();
	expressionEdit->clear();
	seriesTitleEdit->clear();

	CALCULATOR->closeGnuplot();

}
void QalculatePlotDialog::seriesItemRenamed(TQListViewItem *i, const TQString &str, int col) {
	if(!i) return;
	if(col == 0) {
		updatePlot();
	} else if(col == 1) {
		if(str.isEmpty()) {
			KMessageBox::error(this, i18n("Empty expression."));
		}
		MathStructure *x_vector = itemXVector[i], *y_vector = itemYVector[i];
		if(x_vector) delete x_vector;
		if(y_vector) delete y_vector;
		x_vector = NULL;
		y_vector = NULL;
		generatePlotSeries(&x_vector, &y_vector, itemType[i], str.ascii(), itemXVariable[i].ascii());
		itemXVector[i] = x_vector;
		itemYVector[i] = y_vector;
		updatePlot();
	}
	seriesSelected();
}
void QalculatePlotDialog::seriesSelected() {
	TQListViewItem *i = seriesView->selectedItem();
	if(i) {
		modifyButton->setEnabled(true);
		removeButton->setEnabled(true);
		expressionEdit->setText(i->text(1));
		seriesTitleEdit->setText(i->text(0));
		xVariableEdit->setText(itemXVariable[i]);
		styleCombo->setCurrentItem(itemStyle[i]);
		smoothingCombo->setCurrentItem(itemSmoothing[i]);
		typeGroup->setButton(itemType[i]);
		secondaryButton->setChecked(itemAxis[i] == 2);
		primaryButton->setChecked(itemAxis[i] != 2);
		rowsButton->setChecked(itemRows[i]);
	} else {
		modifyButton->setEnabled(false);
		removeButton->setEnabled(false);
	}
}
void QalculatePlotDialog::rangeTypeChanged(int i) {
	stepSizeEdit->setEnabled(i == 1);
	samplingRateBox->setEnabled(i == 0);
}

void QalculatePlotDialog::typeChanged(int i) {
	rowsButton->setEnabled(i == 1 || i == 2);
	xVariableEdit->setEnabled(i != 1 && i != 2);
	xVariableLabel->setEnabled(i != 1 && i != 2);
}
void QalculatePlotDialog::expressionActivated() {
	TQListViewItem *i = seriesView->selectedItem();
	if(i) {
		modifySeries();
	} else {
		addSeries();
	}
}
void QalculatePlotDialog::addSeries() {
	TQString expression = expressionEdit->text();
	if(expression.stripWhiteSpace().isEmpty()) {
		expressionEdit->setFocus();
		KMessageBox::error(this, i18n("Empty expression."));
		return;
	}
	int type = 0, axis = 1;
	bool rows = false;
	TQString title = seriesTitleEdit->text();
	if(vectorMatrixButton->isChecked()) {
		type = 1;
	} else if(pairedMatrixButton->isChecked()) {
		type = 2;
	}
	TQString str_x = xVariableEdit->text().stripWhiteSpace();
	if(str_x.isEmpty() && type == 0) {
		xVariableEdit->setFocus();
		KMessageBox::error(this, i18n("Empty x variable."));
		return;
	}
	expressionEdit->addToHistory(expression);
	if(secondaryButton->isChecked()) {
		axis = 2;
	}
	if((type == 1 || type == 2) && title.isEmpty()) {
		Variable *v = CALCULATOR->getActiveVariable(expression.ascii());
		if(v) {
			title = v->title(false).c_str();
		}
	}
	MathStructure *x_vector, *y_vector;
	generatePlotSeries(&x_vector, &y_vector, type, expression.ascii(), str_x.ascii());
	rows = rowsButton->isChecked();
	TQListViewItem *i = new KListViewItem(seriesView, seriesView->lastChild(), title, expression);
	itemStyle[i] = styleCombo->currentItem();
	itemSmoothing[i] = smoothingCombo->currentItem();
	itemType[i] = type;
	itemAxis[i] = axis;
	itemRows[i] = rows;
	itemXVector[i] = x_vector;
	itemYVector[i] = y_vector;
	itemXVariable[i] = str_x;
	seriesView->setSelected(i, true);
	updatePlot();
}
void QalculatePlotDialog::modifySeries() {
	TQListViewItem *i = seriesView->selectedItem();
	if(i) {
		TQString expression = expressionEdit->text();
		if(expression.stripWhiteSpace().isEmpty()) {
			expressionEdit->setFocus();
			KMessageBox::error(this, i18n("Empty expression."));
			return;
		}
		int type = 0, axis = 1;
		TQString title = seriesTitleEdit->text();
		if(vectorMatrixButton->isChecked()) {
			type = 1;
		} else if(pairedMatrixButton->isChecked()) {
			type = 2;
		}
		TQString str_x = xVariableEdit->text().stripWhiteSpace();
		if(str_x.isEmpty() && type == 0) {
			xVariableEdit->setFocus();
			KMessageBox::error(this, i18n("Empty x variable."));
			return;
		}
		expressionEdit->addToHistory(expression);
		if(secondaryButton->isChecked()) {
			axis = 2;
		}
		if((type == 1 || type == 2) && title.isEmpty()) {
			Variable *v = CALCULATOR->getActiveVariable(expression.ascii());
			if(v) {
				title = v->title(false).c_str();
			}
		}
		MathStructure *x_vector = itemXVector[i], *y_vector = itemYVector[i];
		if(x_vector) delete x_vector;
		if(y_vector) delete y_vector;
		x_vector = NULL;
		y_vector = NULL;
		generatePlotSeries(&x_vector, &y_vector, type, expression.ascii(), str_x.ascii());
		i->setText(0, title);
		i->setText(1, expression);
		itemStyle[i] = styleCombo->currentItem();
		itemSmoothing[i] = smoothingCombo->currentItem();
		itemType[i] = type;
		itemAxis[i] = axis;
		itemRows[i] = rowsButton->isChecked();
		itemXVector[i] = x_vector;
		itemYVector[i] = y_vector;
		itemXVariable[i] = str_x;
		updatePlot();
	}
}
void QalculatePlotDialog::removeSeries() {
	TQListViewItem *i = seriesView->selectedItem();
	if(i) {
		MathStructure *x_vector = itemXVector[i], *y_vector = itemYVector[i];
		if(x_vector) delete x_vector;
		if(y_vector) delete y_vector;
		itemStyle.erase(i);
		itemSmoothing.erase(i);
		itemType.erase(i);
		itemAxis.erase(i);
		itemRows.erase(i);
		itemXVector.erase(i);
		itemYVector.erase(i);
		itemXVariable.erase(i);
		delete i;
		expressionEdit->clear();
		seriesTitleEdit->clear();
		updatePlot();
	}
}
void QalculatePlotDialog::applyRange() {
	TQListViewItemIterator it(seriesView);
	while(it.current()) {
		MathStructure *x_vector = itemXVector[it.current()], *y_vector = itemYVector[it.current()];
		if(y_vector) delete y_vector;
		if(x_vector) delete x_vector;
		x_vector = NULL;
		y_vector = NULL;
		generatePlotSeries(&x_vector, &y_vector, itemType[it.current()], it.current()->text(1).ascii(), itemXVariable[it.current()].ascii());
		itemXVector[it.current()] = x_vector;
		itemYVector[it.current()] = y_vector;
		++it;
	}
	updatePlot();
}
void QalculatePlotDialog::applyAppearance() {
	updatePlot();
}

bool QalculatePlotDialog::generatePlot(PlotParameters &pp, vector<MathStructure> &y_vectors, vector<MathStructure> &x_vectors, vector<PlotDataParameters*> &pdps) {
	TQListViewItemIterator it(seriesView);
	if(!it.current()) {
		return false;
	}	
	while(it.current()) {
		int count = 1;
		TQString title = it.current()->text(0), expression = it.current()->text(1);
		int style = itemStyle[it.current()];
		int smoothing = itemSmoothing[it.current()];
		int type = itemType[it.current()];
		int axis = itemAxis[it.current()];
		bool rows = itemRows[it.current()];
		MathStructure *x_vector = itemXVector[it.current()];
		MathStructure *y_vector = itemYVector[it.current()];
		if(type == 1) {
			if(y_vector->isMatrix()) {
				count = 0;
				if(rows) {
					for(size_t i = 1; i <= y_vector->rows(); i++) {
						y_vectors.push_back(m_undefined);
						y_vector->rowToVector(i, y_vectors[y_vectors.size() - 1]);
						x_vectors.push_back(m_undefined);
						count++;
					}
				} else {
					for(size_t i = 1; i <= y_vector->columns(); i++) {
						y_vectors.push_back(m_undefined);
						y_vector->columnToVector(i, y_vectors[y_vectors.size() - 1]);
						x_vectors.push_back(m_undefined);
						count++;
					}
				}
			} else if(y_vector->isVector()) {
				y_vectors.push_back(*y_vector);
				x_vectors.push_back(m_undefined);
			} else {
				y_vectors.push_back(*y_vector);
				y_vectors[y_vectors.size() - 1].transform(STRUCT_VECTOR);
				x_vectors.push_back(m_undefined);
			}
		} else if(type == 2) {
			if(y_vector->isMatrix()) {
				count = 0;
				if(rows) {
					for(size_t i = 1; i <= y_vector->rows(); i += 2) {
						y_vectors.push_back(m_undefined);
						y_vector->rowToVector(i, y_vectors[y_vectors.size() - 1]);
						x_vectors.push_back(m_undefined);
						y_vector->rowToVector(i + 1, x_vectors[x_vectors.size() - 1]);
						count++;
					}
				} else {
					for(size_t i = 1; i <= y_vector->columns(); i += 2) {
						y_vectors.push_back(m_undefined);
						y_vector->columnToVector(i, y_vectors[y_vectors.size() - 1]);
						x_vectors.push_back(m_undefined);
						y_vector->columnToVector(i + 1, x_vectors[x_vectors.size() - 1]);
						count++;
					}
				}
			} else if(y_vector->isVector()) {
				y_vectors.push_back(*y_vector);
				x_vectors.push_back(m_undefined);
			} else {
				y_vectors.push_back(*y_vector);
				y_vectors[y_vectors.size() - 1].transform(STRUCT_VECTOR);
				x_vectors.push_back(m_undefined);
			}
		} else {
			y_vectors.push_back(*y_vector);
			x_vectors.push_back(*x_vector);
		}
		for(int i = 0; i < count; i++) {
			PlotDataParameters *pdp = new PlotDataParameters();
			pdp->title = title.ascii();
			if(count > 1) {
				pdp->title += " :";
				pdp->title += i2s(i + 1);
			}
			remove_blank_ends(pdp->title);
			if(pdp->title.empty()) {
				pdp->title = expression.ascii();
			}
			switch(smoothing) {
				case 0: {pdp->smoothing = PLOT_SMOOTHING_NONE; break;}
				case 1: {pdp->smoothing = PLOT_SMOOTHING_UNIQUE; break;}
				case 2: {pdp->smoothing = PLOT_SMOOTHING_CSPLINES; break;}
				case 3: {pdp->smoothing = PLOT_SMOOTHING_BEZIER; break;}
				case 4: {pdp->smoothing = PLOT_SMOOTHING_SBEZIER; break;}
			}
			switch(style) {
				case 0: {pdp->style = PLOT_STYLE_LINES; break;}
				case 1: {pdp->style = PLOT_STYLE_POINTS; break;}
				case 2: {pdp->style = PLOT_STYLE_POINTS_LINES; break;}
				case 3: {pdp->style = PLOT_STYLE_DOTS; break;}
				case 4: {pdp->style = PLOT_STYLE_BOXES; break;}
				case 5: {pdp->style = PLOT_STYLE_HISTOGRAM; break;}
				case 6:{pdp->style = PLOT_STYLE_STEPS; break;}
				case 7: {pdp->style = PLOT_STYLE_CANDLESTICKS; break;}
			}
			pdp->yaxis2 = (axis == 2);
			pdps.push_back(pdp);
		}
		++it;
	}
	switch(legendPlacementCombo->currentItem()) {
		case 0: {pp.legend_placement = PLOT_LEGEND_NONE; break;}
		case 1: {pp.legend_placement = PLOT_LEGEND_TOP_LEFT; break;}
		case 2: {pp.legend_placement = PLOT_LEGEND_TOP_RIGHT; break;}
		case 3: {pp.legend_placement = PLOT_LEGEND_BOTTOM_LEFT; break;}
		case 4: {pp.legend_placement = PLOT_LEGEND_BOTTOM_RIGHT; break;}
		case 5: {pp.legend_placement = PLOT_LEGEND_BELOW; break;}
		case 6: {pp.legend_placement = PLOT_LEGEND_OUTSIDE; break;}
	}
	pp.title = titleEdit->text().ascii();
	pp.x_label = xLabelEdit->text().ascii();
	pp.y_label = yLabelEdit->text().ascii();
	pp.grid = gridButton->isChecked();
	pp.x_log = logXButton->isChecked();
	pp.y_log = logYButton->isChecked();
	pp.x_log_base = logXBox->value();
	pp.y_log_base = logYBox->value();
	pp.color = colorButton->isChecked();
	pp.show_all_borders = fullBorderButton->isChecked();
	return true;
}
void QalculatePlotDialog::savePlot() {
	TQString title = titleEdit->text().ascii();
	if(title.isEmpty()) {
		title = "plot.png";
	} else {
		title += ".png";
	}
	TQString filename;
	while(true) {
		filename = KFileDialog::getSaveFileName(title, "image/png image/svg application/postscript image/x-eps /text/x-tex image/x-xfig", this, i18n("Save Image"));
		if(filename.isEmpty()) {
			return;
		} else {
			if(TQFile::exists(filename)) {
				if(KMessageBox::warningContinueCancel(this, i18n("A file named \"%1\" already exists. Are you sure you want to overwrite it?" ).arg(filename), i18n("Overwrite File?"), i18n( "&Overwrite" )) != KMessageBox::Cancel) {
					break;
				}
			} else {
				break;
			}
		}
	}
	vector<MathStructure> y_vectors;
	vector<MathStructure> x_vectors;
	vector<PlotDataParameters*> pdps;
	PlotParameters pp;
	if(generatePlot(pp, y_vectors, x_vectors, pdps)) {
		pp.filename = filename.ascii();
		pp.filetype = PLOT_FILETYPE_AUTO;
		CALCULATOR->plotVectors(&pp, y_vectors, x_vectors, pdps);
		for(size_t i = 0; i < pdps.size(); i++) {
			if(pdps[i]) delete pdps[i];
		}
	}
}
void QalculatePlotDialog::updatePlot() {
	vector<MathStructure> y_vectors;
	vector<MathStructure> x_vectors;
	vector<PlotDataParameters*> pdps;
	PlotParameters pp;
	if(!generatePlot(pp, y_vectors, x_vectors, pdps)) {
		CALCULATOR->closeGnuplot();
		actionButton(User1)->setEnabled(false);
		return;
	}
	CALCULATOR->plotVectors(&pp, y_vectors, x_vectors, pdps);
	actionButton(User1)->setEnabled(true);
	for(size_t i = 0; i < pdps.size(); i++) {
		if(pdps[i]) delete pdps[i];
	}
}
void QalculatePlotDialog::generatePlotSeries(MathStructure **x_vector, MathStructure **y_vector, int type, string str, string str_x) {
	EvaluationOptions eo;
	eo.approximation = APPROXIMATION_APPROXIMATE;
	eo.parse_options = evalops.parse_options;
	eo.parse_options.read_precision = DONT_READ_PRECISION;
	if(type == 1 || type == 2) {
		*y_vector = new MathStructure(CALCULATOR->calculate(CALCULATOR->unlocalizeExpression(str, evalops.parse_options), eo));
		*x_vector = NULL;
	} else {
		MathStructure min(CALCULATOR->calculate(CALCULATOR->unlocalizeExpression(minEdit->text().ascii(), evalops.parse_options), eo));
		MathStructure max(CALCULATOR->calculate(CALCULATOR->unlocalizeExpression(maxEdit->text().ascii(), evalops.parse_options), eo));
		*x_vector = new MathStructure();
		(*x_vector)->clearVector();
		if(stepSizeButton->isChecked()) {
			*y_vector = new MathStructure(CALCULATOR->expressionToPlotVector(str, min, max, CALCULATOR->calculate(CALCULATOR->unlocalizeExpression(stepSizeEdit->text().ascii(), evalops.parse_options), eo), *x_vector, str_x, evalops.parse_options));
		} else {
			*y_vector = new MathStructure(CALCULATOR->expressionToPlotVector(str, min, max, samplingRateBox->value(), *x_vector, str_x, evalops.parse_options));
		}
	}
}

#include "qalculateplotdialog.moc"