Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdeutils@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 608 insertions, 0 deletions

diff --git a/kcalc/kcalcdisplay.cpp b/kcalc/kcalcdisplay.cpp
new file mode 100644
index 0000000..672c363
--- /dev/null
+++ b/kcalc/kcalcdisplay.cpp
@@ -0,0 +1,608 @@
+/*
+    $Id$
+
+    KCalc, a scientific calculator for the X window system using the
+    Qt widget libraries, available at no cost at http://www.troll.no
+    
+    Copyright (C) 1996 Bernd Johannes Wuebben   
+                       wuebben@math.cornell.edu
+
+    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 <errno.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#include <qclipboard.h>
+#include <qpainter.h>
+#include <qregexp.h>
+
+#include <kglobal.h>
+#include <klocale.h>
+#include <knotifyclient.h>
+#include "kcalc_settings.h"
+#include "kcalcdisplay.h"
+#include "kcalcdisplay.moc"
+
+
+KCalcDisplay::KCalcDisplay(QWidget *parent, const char *name)
+  :QLabel(parent,name), _beep(false), _groupdigits(false), _button(0), _lit(false),
+   _num_base(NB_DECIMAL), _precision(9),
+   _fixed_precision(-1), _display_amount(0),
+   selection_timer(new QTimer)
+{
+	setFrameStyle(QFrame::WinPanel | QFrame::Sunken);
+	setAlignment(AlignRight | AlignVCenter);
+	setFocus();
+	setFocusPolicy(QWidget::StrongFocus);
+	setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed, false);
+
+	connect(this, SIGNAL(clicked()), this, SLOT(slotDisplaySelected()));
+
+	connect(selection_timer, SIGNAL(timeout()),
+		this, SLOT(slotSelectionTimedOut()));
+
+	sendEvent(EventReset);
+}
+
+KCalcDisplay::~KCalcDisplay()
+{
+	delete selection_timer;
+}
+
+bool KCalcDisplay::sendEvent(Event const event)
+{
+	switch(event)
+	{
+	case EventReset:
+		_display_amount = 0;
+		_str_int = "0";
+		_str_int_exp = QString::null;
+
+		_eestate = false;
+		_period = false;
+		_neg_sign = false;
+
+		updateDisplay();
+
+		return true;
+	case EventClear:
+		return sendEvent(EventReset);
+	case EventChangeSign:
+		return changeSign();
+	case EventError:
+		updateDisplay();
+
+		return true;
+	default:
+		return false;
+	}
+}
+
+
+void KCalcDisplay::slotCut(void)
+{
+	slotCopy();
+	sendEvent(EventReset);
+}
+
+void KCalcDisplay::slotCopy(void)
+{
+	QString txt = QLabel::text();
+	if (_num_base == NB_HEX)
+		txt.prepend( "0x" );
+	(QApplication::clipboard())->setText(txt, QClipboard::Clipboard);
+	(QApplication::clipboard())->setText(txt, QClipboard::Selection);
+}
+
+void KCalcDisplay::slotPaste(bool bClipboard)
+{
+	QString tmp_str = (QApplication::clipboard())->text(bClipboard ? QClipboard::Clipboard : QClipboard::Selection);
+
+	if (tmp_str.isNull())
+	{
+		if (_beep)  KNotifyClient::beep();
+		return;
+	}
+
+	NumBase tmp_num_base = _num_base;
+
+	tmp_str = tmp_str.stripWhiteSpace();
+
+	if (tmp_str.startsWith("0x", false))
+	  tmp_num_base = NB_HEX;
+
+	if (tmp_num_base != NB_DECIMAL)
+	{
+		bool was_ok;
+		unsigned long long int tmp_result = tmp_str.toULongLong(& was_ok, tmp_num_base);
+
+		if (!was_ok)
+		{
+			setAmount(KNumber::NotDefined);
+			if(_beep) KNotifyClient::beep();
+			return ;
+		}
+	  
+		setAmount(KNumber(tmp_result));
+	} 
+	else // _num_base == NB_DECIMAL && ! tmp_str.startsWith("0x", false)
+	{
+		setAmount(KNumber(tmp_str));
+		if (_beep  &&  _display_amount == KNumber::NotDefined)
+			KNotifyClient::beep();
+	}
+}
+
+void KCalcDisplay::slotDisplaySelected(void)
+{
+	if(_button == LeftButton) {
+		if(_lit) {
+			slotCopy();
+			selection_timer->start(100);
+		} else {
+			selection_timer->stop();
+		}
+
+		invertColors();
+	} else {
+		slotPaste(false); // Selection
+	}
+}
+
+void KCalcDisplay::slotSelectionTimedOut(void)
+{
+	_lit = false;
+	invertColors();
+	selection_timer->stop();
+}
+
+void KCalcDisplay::invertColors()
+{
+	QColor tmp_col(paletteBackgroundColor());
+	setPaletteBackgroundColor(paletteForegroundColor());
+	setPaletteForegroundColor(tmp_col);
+}
+
+
+
+void KCalcDisplay::mousePressEvent(QMouseEvent *e)
+{
+	if(e->button() == LeftButton) {
+		_lit = !_lit;
+		_button = LeftButton;
+	} else {
+		_button = MidButton;
+	}
+	
+	emit clicked();
+}
+
+void KCalcDisplay::setPrecision(int precision)
+{
+	_precision = precision;
+}
+
+void KCalcDisplay::setFixedPrecision(int precision)
+{
+	if (_fixed_precision > _precision)
+		_fixed_precision = -1;
+	else
+		_fixed_precision = precision;
+}
+
+void KCalcDisplay::setBeep(bool flag)
+{
+	_beep = flag;
+}
+
+void KCalcDisplay::setGroupDigits(bool flag)
+{
+	_groupdigits = flag;
+}
+
+KNumber const & KCalcDisplay::getAmount(void) const
+{
+	return _display_amount;
+}
+
+
+bool KCalcDisplay::setAmount(KNumber const & new_amount)
+{
+	QString display_str;
+
+	_str_int = "0";
+	_str_int_exp = QString::null;
+	_period = false;
+	_neg_sign = false;
+	_eestate = false;
+
+	if (_num_base != NB_DECIMAL  && new_amount.type() != KNumber::SpecialType)
+	{
+		_display_amount = new_amount.integerPart();
+		unsigned long long int tmp_workaround = static_cast<unsigned long long int>(_display_amount);
+
+		display_str = QString::number(tmp_workaround, _num_base).upper();
+	}
+	else // _num_base == NB_DECIMAL || new_amount.type() ==
+	     // KNumber::SpecialType
+	{
+		_display_amount = new_amount;
+	
+		display_str = _display_amount.toQString(KCalcSettings::precision(), _fixed_precision);
+#if 0
+		else if (_display_amount > 1.0e+16)
+			display_str = QCString().sprintf(PRINT_LONG_BIG, _precision + 1, _display_amount);
+		else
+			display_str = QCString().sprintf(PRINT_LONG_BIG, _precision, _display_amount);
+#endif
+	}
+
+	setText(display_str);
+	return true;
+	
+}
+
+void KCalcDisplay::setText(QString const &string)
+{
+	QString localizedString = string;
+
+	// If we aren't in decimal mode, we don't need to modify the string
+	if (_num_base == NB_DECIMAL  &&  _groupdigits)
+	  // when input ends with "." (because uncomplete), the
+	  // formatNumber-method does not work; fix by hand by
+	  // truncating, formatting and appending again
+	  if (string.endsWith(".")) {
+	    localizedString.truncate(localizedString.length() - 1);
+	    localizedString = KGlobal::locale()->formatNumber(localizedString, false, 0); // Note: rounding happened already above!
+	    localizedString.append(KGlobal::locale()->decimalSymbol());
+	  } else
+	    localizedString = KGlobal::locale()->formatNumber(string, false, 0); // Note: rounding happened already above!
+
+	QLabel::setText(localizedString);
+	emit changedText(localizedString);
+}
+
+QString KCalcDisplay::text() const
+{
+	if (_num_base != NB_DECIMAL)
+		return QLabel::text();
+	QString display_str = _display_amount.toQString(KCalcSettings::precision());
+
+	return display_str;
+	//	return QCString().sprintf(PRINT_LONG_BIG, 40, _display_amount);
+}
+
+/* change representation of display to new base (i.e. binary, decimal,
+   octal, hexadecimal). The amount being displayed is changed to this
+   base, but for now this amount can not be modified anymore (like
+   being set with "setAmount"). Return value is the new base. */
+int KCalcDisplay::setBase(NumBase new_base)
+{
+	CALCAMNT tmp_val = static_cast<unsigned long long int>(getAmount());
+
+	switch(new_base)
+	{
+	case NB_HEX:
+		_num_base	= NB_HEX;
+		_period 	= false;
+		break;
+	case NB_DECIMAL:
+		_num_base	= NB_DECIMAL;
+		break;
+	case NB_OCTAL:
+		_num_base	= NB_OCTAL;
+		_period 	= false;
+		break;
+	case NB_BINARY:
+		_num_base	= NB_BINARY;
+		_period 	= false;
+		break;
+	default: // we shouldn't ever end up here
+		_num_base	= NB_DECIMAL;
+	}
+
+	setAmount(static_cast<unsigned long long int>(tmp_val));
+	
+	return _num_base;
+}
+
+void KCalcDisplay::setStatusText(uint i, const QString& text)
+{
+	if (i < NUM_STATUS_TEXT)
+		_str_status[i] = text;
+	update();
+}
+
+bool KCalcDisplay::updateDisplay(void)
+{
+	// Put sign in front.
+	QString tmp_string;
+	if(_neg_sign == true)
+		tmp_string = "-" + _str_int;
+	else
+		tmp_string = _str_int;
+
+	switch(_num_base)
+	{
+	case NB_BINARY:
+		Q_ASSERT(_period == false  && _eestate == false);
+		setText(tmp_string);
+		_display_amount = static_cast<unsigned long long int>(STRTOUL(_str_int.latin1(), 0, 2));
+		if (_neg_sign)
+			_display_amount = -_display_amount;
+		//str_size = cvb(_str_int, boh_work, DSP_SIZE);
+		break;
+	  
+	case NB_OCTAL:
+		Q_ASSERT(_period == false  && _eestate == false);
+		setText(tmp_string);
+		_display_amount = static_cast<unsigned long long int>(STRTOUL(_str_int.latin1(), 0, 8));
+		if (_neg_sign)
+			_display_amount = -_display_amount;
+		break;
+		
+	case NB_HEX:
+		Q_ASSERT(_period == false  && _eestate == false);
+		setText(tmp_string);
+		_display_amount = static_cast<unsigned long long int>(STRTOUL(_str_int.latin1(), 0, 16));
+		if (_neg_sign)
+			_display_amount = -_display_amount;
+		break;
+	  
+	case NB_DECIMAL:
+		if(_eestate == false)
+		{
+			setText(tmp_string);
+			_display_amount = tmp_string;
+		}
+		else
+		{
+			if(_str_int_exp.isNull())
+			{
+				// add 'e0' to display but not to conversion
+				_display_amount = tmp_string;
+				setText(tmp_string + "e0");
+			}
+			else
+			{
+				tmp_string +=  'e' + _str_int_exp;
+				setText(tmp_string);
+				_display_amount = tmp_string;
+			}
+		}
+		break;
+	  
+	default:
+	  return false;
+	}
+
+	return true;
+}
+
+void KCalcDisplay::newCharacter(char const new_char)
+{
+	// test if character is valid
+	switch(new_char)
+	{
+	case 'e':
+		// EE can be set only once and in decimal mode
+		if (_num_base != NB_DECIMAL  ||
+		    _eestate == true)
+		{
+			if(_beep) KNotifyClient::beep();
+			return;
+		}
+		_eestate = true;
+		break;
+
+	case '.':
+		// Period can be set only once and only in decimal
+		// mode, also not in EE-mode
+		if (_num_base != NB_DECIMAL  ||
+		    _period == true  ||
+		    _eestate == true)
+		{
+			if(_beep) KNotifyClient::beep();
+			return;
+		}
+		_period = true;
+		break;
+
+	case 'F':
+	case 'E':
+	case 'D':
+	case 'C':
+	case 'B':
+	case 'A':
+		if (_num_base == NB_DECIMAL)
+		{
+			if(_beep) KNotifyClient::beep();
+			return;
+		}
+		// no break
+	case '9':
+	case '8':
+		if (_num_base == NB_OCTAL)
+		{
+			if(_beep) KNotifyClient::beep();
+			return;
+		}
+		// no break
+	case '7':
+	case '6':
+	case '5':
+	case '4':
+	case '3':
+	case '2':
+		if (_num_base == NB_BINARY)
+		{
+			if(_beep) KNotifyClient::beep();
+			return;
+		}
+		// no break
+	case '1':
+	case '0':
+		break;
+
+	default:
+		if(_beep) KNotifyClient::beep();
+		return;
+	}
+
+	// change exponent or mantissa
+	if (_eestate)
+	{
+	  // ignore ',' before 'e'. turn e.g. '123.e' into '123e'
+	  if (new_char == 'e'  && _str_int.endsWith( "." ))
+	    {
+			_str_int.truncate(_str_int.length() - 1);
+			_period = false;
+	    }
+
+	  // 'e' only starts ee_mode, leaves strings unchanged
+	  if (new_char != 'e'  &&
+	      // do not add '0' if at start of exp
+	      !(_str_int_exp.isNull() && new_char == '0'))
+			_str_int_exp.append(new_char);
+	}
+	else
+	{
+		// handle first character
+		if (_str_int == "0")
+		{
+			switch(new_char)
+			{
+			case '.':
+				// display "0." not just "."
+				_str_int.append(new_char);
+				break;
+			case 'e':
+				// display "0e" not just "e"
+				// "0e" does not make sense either, but...
+				_str_int.append(new_char);
+				break;
+			default:
+				// no leading '0's
+				_str_int[0] = new_char;
+			}
+		}
+		else
+			_str_int.append(new_char);
+	}
+
+	updateDisplay();
+}
+
+void KCalcDisplay::deleteLastDigit(void)
+{
+	// Only partially implemented !!
+	if (_eestate)
+	{
+		if(_str_int_exp.isNull())
+		{
+			_eestate = false;
+		}
+		else
+		{
+			int length = _str_int_exp.length();
+			if(length > 1)
+			{
+				_str_int_exp.truncate(length-1);
+			}
+			else
+			{
+				_str_int_exp = (char *)0;
+			}
+		}
+	}
+	else
+	{
+		int length = _str_int.length();
+		if(length > 1)
+		{
+			if (_str_int[length-1] == '.')
+				_period = false;
+			_str_int.truncate(length-1);
+		}
+		else
+		{
+			Q_ASSERT(_period == false);
+			_str_int[0] = '0';
+		}
+	}
+
+	updateDisplay();
+}
+
+// change Sign of display. Problem: Only possible here, when in input
+// mode. Otherwise return 'false' so that the kcalc_core can handle
+// things.
+bool KCalcDisplay::changeSign(void)
+{
+	//stupid way, to see if in input_mode or display_mode
+	if (_str_int == "0") return false;
+
+	if(_eestate)
+	{
+		if(!_str_int_exp.isNull())
+		{
+			if (_str_int_exp[0] != '-')
+				_str_int_exp.prepend('-');
+			else
+				_str_int_exp.remove('-');
+		}
+	}
+	else
+	{
+		_neg_sign = ! _neg_sign;
+	}
+	
+	updateDisplay();
+
+	return true;
+}
+
+void KCalcDisplay::drawContents(QPainter *p)
+{
+	QLabel::drawContents(p);
+
+	// draw the status texts using half of the normal
+	// font size but not smaller than 7pt
+	QFont f(font());
+	f.setPointSize(QMAX((f.pointSize() / 2), 7));
+	p->setFont(f);
+	QFontMetrics fm(f);
+	uint w = fm.width("_____");
+	uint h = fm.height();
+
+	for (uint i = 0; i < NUM_STATUS_TEXT; i++)
+	{
+		p->drawText(5 + i * w, h, _str_status[i]);
+	}
+}
+
+// Return the QLabel's normal size hint vertically expanded
+// by half the font height to make room for the status texts
+QSize KCalcDisplay::sizeHint() const
+{
+	QFont f(font());
+	f.setPointSize(QMAX((f.pointSize() / 2), 7));
+	QFontMetrics fm(f);
+	return QLabel::sizeHint() + QSize(0, fm.height());
+}
+