rendered paste body<?php /**************************************************************** ** ** Qt Calculator ** ** original: ** http://doc.trolltech.com/4.1/widgets-calculator.html ** ****************************************************************/ require_once('button.php'); class Calculator extends QDialog { private $sumInMemory = 0.0; private $sumSoFar = 0.0; private $factorSoFar = 0.0; private $pendingAdditiveOperator; private $pendingMultiplicativeOperator; private $waitingForOperand = true; private $display; const NumDigitButtons = 10; private $digitButtons; private $pointButton; private $changeSignButton; private $backspaceButton; private $clearButton; private $clearAllButton; private $clearMemoryButton; private $readMemoryButton; private $setMemoryButton; private $addToMemoryButton; private $divisionButton; private $timesButton; private $minusButton; private $plusButton; private $squareRootButton; private $powerButton; private $reciprocalButton; private $equalButton; private $slots = array( "digitClicked()", "unaryOperatorClicked()", "additiveOperatorClicked()", "multiplicativeOperatorClicked()", "equalClicked()", "pointClicked()", "changeSignClicked()", "backspaceClicked()", "clear()", "clearAll()", "clearMemory()", "read_Memory()", "setMemory()", "addToMemory()" ); private $signals = array(""); function __construct() { parent::__construct(); $this->pendingAdditiveOperator = new QString(); $this->pendingMultiplicativeOperator = new QString(); $this->display = new QLineEdit("0"); $this->display->setReadOnly(true); $this->display->setAlignment(Qt::AlignRight); $this->display->setMaxLength(15); $this->display->installEventFilter($this); $font = $this->display->font(); $font->setPointSize($font->pointSize() + 8); $this->display->setFont($font); $digitColor = new QColor(150, 205, 205); $backspaceColor = new QColor(225, 185, 135); $memoryColor = new QColor(100, 155, 155); $operatorColor = new QColor(155, 175, 195); for ($i = 0; $i < Calculator::NumDigitButtons; ++$i) { $this->digitButtons[$i] = $this->createButton(tr($i), $digitColor, SLOT('digitClicked()')); } $this->pointButton = $this->createButton(tr("."), $digitColor, SLOT('pointClicked()')); $this->changeSignButton = $this->createButton(tr("\261"), $digitColor, SLOT('changeSignClicked()')); $this->backspaceButton = $this->createButton(tr("Backspace"), $backspaceColor, SLOT('backspaceClicked()')); $this->clearButton = $this->createButton(tr("Clear"), $backspaceColor, SLOT('clear()')); $this->clearAllButton = $this->createButton(tr("Clear All"), $backspaceColor, SLOT('clearAll()')); $this->clearMemoryButton = $this->createButton(tr("MC"), $memoryColor, SLOT('clearMemory()')); $this->readMemoryButton = $this->createButton(tr("MR"), $memoryColor, SLOT('read_Memory()')); $this->setMemoryButton = $this->createButton(tr("MS"), $memoryColor, SLOT('setMemory()')); $this->addToMemoryButton = $this->createButton(tr("M+"), $memoryColor, SLOT('addToMemory()')); $this->divisionButton = $this->createButton(tr("\367"), $operatorColor, SLOT('multiplicativeOperatorClicked()')); $this->timesButton = $this->createButton(tr("\327"), $operatorColor, SLOT('multiplicativeOperatorClicked()')); $this->minusButton = $this->createButton(tr("-"), $operatorColor, SLOT('additiveOperatorClicked()')); $this->plusButton = $this->createButton(tr("+"), $operatorColor, SLOT('additiveOperatorClicked()')); $this->squareRootButton = $this->createButton(tr("Sqrt"), $operatorColor, SLOT('unaryOperatorClicked()')); $this->powerButton = $this->createButton(tr("x\262"), $operatorColor, SLOT('unaryOperatorClicked()')); $this->reciprocalButton = $this->createButton(tr("1/x"), $operatorColor, SLOT('unaryOperatorClicked()')); $this->equalButton = $this->createButton(tr("="), $operatorColor, SLOT('equalClicked()')); $this->mainLayout = new QGridLayout($this); $this->mainLayout->setSizeConstraint(QLayout::SetFixedSize); $this->mainLayout->addWidget($this->display, 0, 0, 1, 6); $this->mainLayout->addWidget($this->backspaceButton, 1, 0, 1, 2); $this->mainLayout->addWidget($this->clearButton, 1, 2, 1, 2); $this->mainLayout->addWidget($this->clearAllButton, 1, 4, 1, 2); $this->mainLayout->addWidget($this->clearMemoryButton, 2, 0); $this->mainLayout->addWidget($this->readMemoryButton, 3, 0); $this->mainLayout->addWidget($this->setMemoryButton, 4, 0); $this->mainLayout->addWidget($this->addToMemoryButton, 5, 0); for ($i = 1; $i < Calculator::NumDigitButtons; ++$i) { $row = ceil(((8 - ($i+1))) / 3) + 2; $column = ceil((($i-1) % 3)) + 1; $this->mainLayout->addWidget($this->digitButtons[$i], (int) $row, (int) $column); } $this->mainLayout->addWidget($this->digitButtons[0], 5, 1); $this->mainLayout->addWidget($this->pointButton, 5, 2); $this->mainLayout->addWidget($this->changeSignButton, 5, 3); $this->mainLayout->addWidget($this->divisionButton, 2, 4); $this->mainLayout->addWidget($this->timesButton, 3, 4); $this->mainLayout->addWidget($this->minusButton, 4, 4); $this->mainLayout->addWidget($this->plusButton, 5, 4); $this->mainLayout->addWidget($this->squareRootButton, 2, 5); $this->mainLayout->addWidget($this->powerButton, 3, 5); $this->mainLayout->addWidget($this->reciprocalButton, 4, 5); $this->mainLayout->addWidget($this->equalButton, 5, 5); $this->setLayout($this->mainLayout); $this->setWindowTitle(tr("Calculator")); } function eventFilter($target, $event){ if ($target == $display) { if ($event->type() == QEvent::MouseButtonPress || $event->type() == QEvent::MouseButtonDblClick || $event->type() == QEvent::MouseButtonRelease || $event->type() == QEvent::ContextMenu) { $mouseEvent = $event; if ($mouseEvent->buttons() & Qt::LeftButton) { $newPalette = $this->palette(); $newPalette->setColor(QPalette::Base, $this->display->palette()->color(QPalette::Text)); $newPalette->setColor(QPalette::Text, $this->display->palette()->color(QPalette::Base)); $this->display->setPalette($newPalette); } else { $this->display->setPalette($palette()); } return true; } } return parent::eventFilter($target, $event); } function digitClicked() { $clickedButton = qobject_cast($this->sender(), new QToolButton()); $digitValue = $clickedButton->text()->toInt(); if ($this->display->text() == "0" && $digitValue == 0.0) return; if ($this->waitingForOperand) { $this->display->clear(); $this->waitingForOperand = false; } $this->display->setText($this->display->text()->append(QString::number($digitValue))); } function unaryOperatorClicked() { $clickedButton = qobject_cast($this->sender(), $this->pointButton); $clickedOperator = $clickedButton->text(); $operand = $this->display->text()->toDouble(); $result = 0.0; if ($clickedOperator->__toString() == "Sqrt") { if ($operand < 0.0) { $this->abortOperation(); return; } $result = sqrt($operand); } else if ($clickedOperator->__toString() == tr("x\262")) { $result = pow($operand, 2.0); } else if ($clickedOperator->__toString() == tr("1/x")) { if ($operand == 0.0) { $this->abortOperation(); return; } $result = 1.0 / $operand; } $this->display->setText(QString::number($result)); $this->waitingForOperand = true; } function additiveOperatorClicked() { $clickedButton = qobject_cast($this->sender(), $this->pointButton); $clickedOperator = $clickedButton->text(); $operand = $this->display->text()->toDouble(); if (!$this->pendingMultiplicativeOperator->isEmpty()) { if (!$this->calculate($operand, $this->pendingMultiplicativeOperator)) { $this->abortOperation(); return; } $this->display->setText(QString::number($this->factorSoFar)); $operand = $this->factorSoFar; $this->factorSoFar = 0.0; $this->pendingMultiplicativeOperator->clear(); } if (!$this->pendingAdditiveOperator->isEmpty()) { if (!$this->calculate($operand, $this->pendingAdditiveOperator)) { $this->abortOperation(); return; } $this->display->setText(QString::number($this->sumSoFar)); } else { $this->sumSoFar = $operand; } $this->pendingAdditiveOperator = $clickedOperator; $this->waitingForOperand = true; } function multiplicativeOperatorClicked() { $clickedButton = qobject_cast($this->sender(), $this->pointButton); $clickedOperator = $clickedButton->text(); $operand = $this->display->text()->toDouble(); if (!$this->pendingMultiplicativeOperator->isEmpty()) { if (!$this->calculate($operand, $this->pendingMultiplicativeOperator)) { $this->abortOperation(); return; } $this->display->setText(QString::number($this->factorSoFar)); } else { $this->factorSoFar = $operand; } $this->pendingMultiplicativeOperator = $clickedOperator; $this->waitingForOperand = true; } function equalClicked() { $operand = $this->display->text()->toDouble(); if (!$this->pendingMultiplicativeOperator->isEmpty()) { if (!$this->calculate($operand, $this->pendingMultiplicativeOperator)) { $this->abortOperation(); return; } $operand = $this->factorSoFar; $this->factorSoFar = 0.0; $this->pendingMultiplicativeOperator->clear(); } if (!$this->pendingAdditiveOperator->isEmpty()) { if (!$this->calculate($operand, $this->pendingAdditiveOperator)) { $this->abortOperation(); return; } $this->pendingAdditiveOperator->clear(); } else { $this->sumSoFar = $operand; } $this->display->setText(QString::number($this->sumSoFar)); $this->sumSoFar = 0.0; $this->waitingForOperand = true; } function pointClicked() { if ($this->waitingForOperand) $this->display->setText(tr("0")); if (!$this->display->text()->contains(tr("."))) $this->display->setText($this->display->text()->append(tr("."))); $this->waitingForOperand = false; } function changeSignClicked() { $text = $this->display->text(); $value = $text->toDouble(); if ($value > 0.0) { $text->prepend(tr("-")); } else if ($value < 0.0) { $text->remove(0, 1); } $this->display->setText($text); } function backspaceClicked() { if ($this->waitingForOperand) return; $text = $this->display->text(); $text->chop(1); if ($text->isEmpty()) { $text = tr("0"); $this->waitingForOperand = true; } $this->display->setText($text); } function clear() { if ($this->waitingForOperand) return; $this->display->setText(tr("0")); $this->waitingForOperand = true; } function clearAll() { $this->sumSoFar = 0.0; $this->factorSoFar = 0.0; $this->pendingAdditiveOperator->clear(); $this->pendingMultiplicativeOperator->clear(); $this->display->setText(tr("0")); $this->waitingForOperand = true; } function clearMemory() { $this->sumInMemory = 0.0; } function read_Memory() { $this->display->setText(QString::number($this->sumInMemory)); $this->waitingForOperand = true; } function setMemory() { $this->equalClicked(); $this->sumInMemory = $this->display->text()->toDouble(); } function addToMemory() { $this->equalClicked(); $this->sumInMemory += $this->display->text()->toDouble(); } function createButton($text, $color, $member) { $button = new Button($text, $color); $this->connect($button, SIGNAL('clicked()'), $this, $member); return $button; } function abortOperation() { $this->clearAll(); $this->display->setText(tr("####")); } function calculate($rightOperand, $pendingOperator) { if ($pendingOperator->__toString() == "+") { $this->sumSoFar += $rightOperand; } else if ($pendingOperator->__toString() == "-") { $this->sumSoFar -= $rightOperand; } else if ($pendingOperator->__toString() == tr("\327")) { $this->factorSoFar *= $rightOperand; } else if ($pendingOperator->__toString() == tr("\367")) { if ($rightOperand == 0.0) return false; $this->factorSoFar /= $rightOperand; } return true; } }?>