def setupUi(self):
        self.labels = {}
        self.widgets = {}
        self.checkBoxes = {}
        self.showAdvanced = False
        self.valueItems = {}
        self.dependentItems = {}
        self.resize(650, 450)
        self.buttonBox = QDialogButtonBox()
        self.buttonBox.setOrientation(Qt.Horizontal)
        self.buttonBox.setStandardButtons(QDialogButtonBox.Cancel
                                          | QDialogButtonBox.Ok)
        tooltips = self._alg.getParameterDescriptions()
        self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        self.verticalLayout = QVBoxLayout()
        self.verticalLayout.setSpacing(5)
        self.verticalLayout.setMargin(20)

        hLayout = QHBoxLayout()
        hLayout.setSpacing(5)
        hLayout.setMargin(0)
        descriptionLabel = QLabel(self.tr("Description"))
        self.descriptionBox = QLineEdit()
        self.descriptionBox.setText(self._alg.name)
        hLayout.addWidget(descriptionLabel)
        hLayout.addWidget(self.descriptionBox)
        self.verticalLayout.addLayout(hLayout)
        line = QFrame()
        line.setFrameShape(QFrame.HLine)
        line.setFrameShadow(QFrame.Sunken)
        self.verticalLayout.addWidget(line)

        for param in self._alg.parameters:
            if param.isAdvanced:
                self.advancedButton = QPushButton()
                self.advancedButton.setText(
                    self.tr('Show advanced parameters'))
                self.advancedButton.clicked.connect(
                    self.showAdvancedParametersClicked)
                advancedButtonHLayout = QHBoxLayout()
                advancedButtonHLayout.addWidget(self.advancedButton)
                advancedButtonHLayout.addStretch()
                self.verticalLayout.addLayout(advancedButtonHLayout)
                break
        for param in self._alg.parameters:
            if param.hidden:
                continue
            desc = param.description
            if isinstance(param, ParameterExtent):
                desc += self.tr('(xmin, xmax, ymin, ymax)')
            if isinstance(param, ParameterPoint):
                desc += self.tr('(x, y)')
            label = QLabel(desc)
            self.labels[param.name] = label
            widget = self.getWidgetFromParameter(param)
            self.valueItems[param.name] = widget
            if param.name in tooltips.keys():
                tooltip = tooltips[param.name]
            else:
                tooltip = param.description
            label.setToolTip(tooltip)
            widget.setToolTip(tooltip)
            if param.isAdvanced:
                label.setVisible(self.showAdvanced)
                widget.setVisible(self.showAdvanced)
                self.widgets[param.name] = widget
            self.verticalLayout.addWidget(label)
            self.verticalLayout.addWidget(widget)

        for output in self._alg.outputs:
            if output.hidden:
                continue
            if isinstance(output, (OutputRaster, OutputVector, OutputTable,
                                   OutputHTML, OutputFile, OutputDirectory)):
                label = QLabel(output.description + '<' +
                               output.__class__.__name__ + '>')
                item = QLineEdit()
                if hasattr(item, 'setPlaceholderText'):
                    item.setPlaceholderText(ModelerParametersDialog.ENTER_NAME)
                self.verticalLayout.addWidget(label)
                self.verticalLayout.addWidget(item)
                self.valueItems[output.name] = item

        label = QLabel(' ')
        self.verticalLayout.addWidget(label)
        label = QLabel(self.tr('Parent algorithms'))
        self.dependenciesPanel = self.getDependenciesPanel()
        self.verticalLayout.addWidget(label)
        self.verticalLayout.addWidget(self.dependenciesPanel)

        self.verticalLayout.addStretch(1000)
        self.setLayout(self.verticalLayout)

        self.setPreviousValues()
        self.setWindowTitle(self._alg.name)
        self.verticalLayout2 = QVBoxLayout()
        self.verticalLayout2.setSpacing(2)
        self.verticalLayout2.setMargin(0)
        self.tabWidget = QTabWidget()
        self.tabWidget.setMinimumWidth(300)
        self.paramPanel = QWidget()
        self.paramPanel.setLayout(self.verticalLayout)
        self.scrollArea = QScrollArea()
        self.scrollArea.setWidget(self.paramPanel)
        self.scrollArea.setWidgetResizable(True)
        self.tabWidget.addTab(self.scrollArea, self.tr('Parameters'))
        self.webView = QWebView()

        html = None
        url = None
        isText, help = self._alg.help()
        if help is not None:
            if isText:
                html = help
            else:
                url = QUrl(help)
        else:
            html = self.tr('<h2>Sorry, no help is available for this '
                           'algorithm.</h2>')
        try:
            if html:
                self.webView.setHtml(html)
            elif url:
                self.webView.load(url)
        except:
            self.webView.setHtml(
                self.tr('<h2>Could not open help file :-( </h2>'))
        self.tabWidget.addTab(self.webView, 'Help')
        self.verticalLayout2.addWidget(self.tabWidget)
        self.verticalLayout2.addWidget(self.buttonBox)
        self.setLayout(self.verticalLayout2)
        self.buttonBox.accepted.connect(self.okPressed)
        self.buttonBox.rejected.connect(self.cancelPressed)
        QMetaObject.connectSlotsByName(self)
class CalculatorModelerParametersDialog(ModelerParametersDialog):
    def setupUi(self):
        self.valueItems = {}
        self.dependentItems = {}
        self.resize(650, 450)
        self.buttonBox = QDialogButtonBox()
        self.buttonBox.setOrientation(Qt.Horizontal)
        self.buttonBox.setStandardButtons(QDialogButtonBox.Cancel
                                          | QDialogButtonBox.Ok)
        self.infoText = QTextEdit()
        numbers = self.getAvailableValuesOfType(ParameterNumber, OutputNumber)
        text = self.tr(
            'You can refer to model values in your formula, using '
            'single-letter variables, as follows:\n',
            'CalculatorModelerParametersDialog')
        ichar = 97
        if numbers:
            for number in numbers:
                text += chr(ichar) + '->' + self.resolveValueDescription(
                    number) + '\n'
                ichar += 1
        else:
            text += self.tr('\n - No numerical variables are available.',
                            'CalculatorModelerParametersDialog')
        self.infoText.setText(text)
        self.infoText.setEnabled(False)
        self.formulaText = QLineEdit()
        if hasattr(self.formulaText, 'setPlaceholderText'):
            self.formulaText.setPlaceholderText(
                self.tr('[Enter your formula here]',
                        'CalculatorModelerParametersDialog'))
        if self._algName is not None:
            alg = self.model.algs[self._algName]
            self.formulaText.setText(alg.params[FORMULA])
        self.setWindowTitle(
            self.tr('Calculator', 'CalculatorModelerParametersDialog'))
        self.verticalLayout = QVBoxLayout()
        self.verticalLayout.setSpacing(2)
        self.verticalLayout.setMargin(0)
        self.verticalLayout.addWidget(self.infoText)
        self.verticalLayout.addWidget(self.formulaText)
        self.verticalLayout.addWidget(self.buttonBox)
        self.setLayout(self.verticalLayout)
        self.buttonBox.accepted.connect(self.okPressed)
        self.buttonBox.rejected.connect(self.cancelPressed)
        QMetaObject.connectSlotsByName(self)

    def createAlgorithm(self):
        alg = Algorithm('modelertools:calculator')
        alg.setName(self.model)
        alg.description = self.tr('Calculator',
                                  'CalculatorModelerParametersDialog')

        formula = self.formulaText.text()
        alg.params[FORMULA] = formula

        for i in xrange(AVAILABLE_VARIABLES):
            paramname = NUMBER + unicode(i)
            alg.params[paramname] = None

        numbers = self.getAvailableValuesOfType(ParameterNumber, OutputNumber)
        used = []
        for i in range(len(numbers)):
            if unicode(chr(i + 97)) in formula:
                used.append(numbers[i])

        for i, variable in enumerate(used):
            paramname = NUMBER + unicode(i)
            alg.params[paramname] = variable

        # TODO check formula is correct
        return alg
class CalculatorModelerParametersDialog(ModelerParametersDialog):

    def setupUi(self):
        self.valueItems = {}
        self.dependentItems = {}
        self.resize(650, 450)
        self.buttonBox = QDialogButtonBox()
        self.buttonBox.setOrientation(Qt.Horizontal)
        self.buttonBox.setStandardButtons(QDialogButtonBox.Cancel
                                          | QDialogButtonBox.Ok)
        self.infoText = QTextEdit()
        numbers = self.getAvailableValuesOfType(ParameterNumber, OutputNumber)
        text = self.tr('You can refer to model values in your formula, using '
                       'single-letter variables, as follows:\n', 'CalculatorModelerParametersDialog')
        ichar = 97
        if numbers:
            for number in numbers:
                text += chr(ichar) + '->' + self.resolveValueDescription(number) + '\n'
                ichar += 1
        else:
            text += self.tr('\n - No numerical variables are available.', 'CalculatorModelerParametersDialog')
        self.infoText.setText(text)
        self.infoText.setEnabled(False)
        self.formulaText = QLineEdit()
        if hasattr(self.formulaText, 'setPlaceholderText'):
            self.formulaText.setPlaceholderText(self.tr('[Enter your formula here]', 'CalculatorModelerParametersDialog'))
        if self._algName is not None:
            alg = self.model.algs[self._algName]
            self.formulaText.setText(alg.params[FORMULA])
        self.setWindowTitle(self.tr('Calculator', 'CalculatorModelerParametersDialog'))
        self.verticalLayout = QVBoxLayout()
        self.verticalLayout.setSpacing(2)
        self.verticalLayout.setMargin(0)
        self.verticalLayout.addWidget(self.infoText)
        self.verticalLayout.addWidget(self.formulaText)
        self.verticalLayout.addWidget(self.buttonBox)
        self.setLayout(self.verticalLayout)
        self.buttonBox.accepted.connect(self.okPressed)
        self.buttonBox.rejected.connect(self.cancelPressed)
        QMetaObject.connectSlotsByName(self)

    def createAlgorithm(self):
        alg = Algorithm('modelertools:calculator')
        alg.setName(self.model)
        alg.description = self.tr('Calculator', 'CalculatorModelerParametersDialog')

        formula = self.formulaText.text()
        alg.params[FORMULA] = formula

        for i in xrange(AVAILABLE_VARIABLES):
            paramname = NUMBER + unicode(i)
            alg.params[paramname] = None

        numbers = self.getAvailableValuesOfType(ParameterNumber, OutputNumber)
        used = []
        for i in range(len(numbers)):
            if unicode(chr(i + 97)) in formula:
                used.append(numbers[i])

        for i, variable in enumerate(used):
            paramname = NUMBER + unicode(i)
            alg.params[paramname] = variable

        # TODO check formula is correct
        return alg
    def setupUi(self):
        self.labels = {}
        self.widgets = {}
        self.checkBoxes = {}
        self.showAdvanced = False
        self.valueItems = {}
        self.dependentItems = {}
        self.resize(650, 450)
        self.buttonBox = QDialogButtonBox()
        self.buttonBox.setOrientation(Qt.Horizontal)
        self.buttonBox.setStandardButtons(QDialogButtonBox.Cancel
                                          | QDialogButtonBox.Ok)
        tooltips = self._alg.getParameterDescriptions()
        self.setSizePolicy(QSizePolicy.Expanding,
                           QSizePolicy.Expanding)
        self.verticalLayout = QVBoxLayout()
        self.verticalLayout.setSpacing(5)
        self.verticalLayout.setMargin(20)

        hLayout = QHBoxLayout()
        hLayout.setSpacing(5)
        hLayout.setMargin(0)
        descriptionLabel = QLabel(self.tr("Description"))
        self.descriptionBox = QLineEdit()
        self.descriptionBox.setText(self._alg.name)
        hLayout.addWidget(descriptionLabel)
        hLayout.addWidget(self.descriptionBox)
        self.verticalLayout.addLayout(hLayout)
        line = QFrame()
        line.setFrameShape(QFrame.HLine)
        line.setFrameShadow(QFrame.Sunken)
        self.verticalLayout.addWidget(line)

        for param in self._alg.parameters:
            if param.isAdvanced:
                self.advancedButton = QPushButton()
                self.advancedButton.setText(self.tr('Show advanced parameters'))
                self.advancedButton.clicked.connect(
                    self.showAdvancedParametersClicked)
                advancedButtonHLayout = QHBoxLayout()
                advancedButtonHLayout.addWidget(self.advancedButton)
                advancedButtonHLayout.addStretch()
                self.verticalLayout.addLayout(advancedButtonHLayout)
                break
        for param in self._alg.parameters:
            if param.hidden:
                continue
            desc = param.description
            if isinstance(param, ParameterExtent):
                desc += self.tr('(xmin, xmax, ymin, ymax)')
            if isinstance(param, ParameterPoint):
                desc += self.tr('(x, y)')
            label = QLabel(desc)
            self.labels[param.name] = label
            widget = self.getWidgetFromParameter(param)
            self.valueItems[param.name] = widget
            if param.name in tooltips.keys():
                tooltip = tooltips[param.name]
            else:
                tooltip = param.description
            label.setToolTip(tooltip)
            widget.setToolTip(tooltip)
            if param.isAdvanced:
                label.setVisible(self.showAdvanced)
                widget.setVisible(self.showAdvanced)
                self.widgets[param.name] = widget
            self.verticalLayout.addWidget(label)
            self.verticalLayout.addWidget(widget)

        for output in self._alg.outputs:
            if output.hidden:
                continue
            if isinstance(output, (OutputRaster, OutputVector, OutputTable,
                                   OutputHTML, OutputFile, OutputDirectory)):
                label = QLabel(output.description + '<'
                               + output.__class__.__name__ + '>')
                item = QLineEdit()
                if hasattr(item, 'setPlaceholderText'):
                    item.setPlaceholderText(ModelerParametersDialog.ENTER_NAME)
                self.verticalLayout.addWidget(label)
                self.verticalLayout.addWidget(item)
                self.valueItems[output.name] = item

        label = QLabel(' ')
        self.verticalLayout.addWidget(label)
        label = QLabel(self.tr('Parent algorithms'))
        self.dependenciesPanel = self.getDependenciesPanel()
        self.verticalLayout.addWidget(label)
        self.verticalLayout.addWidget(self.dependenciesPanel)

        self.verticalLayout.addStretch(1000)
        self.setLayout(self.verticalLayout)

        self.setPreviousValues()
        self.setWindowTitle(self._alg.name)
        self.verticalLayout2 = QVBoxLayout()
        self.verticalLayout2.setSpacing(2)
        self.verticalLayout2.setMargin(0)
        self.tabWidget = QTabWidget()
        self.tabWidget.setMinimumWidth(300)
        self.paramPanel = QWidget()
        self.paramPanel.setLayout(self.verticalLayout)
        self.scrollArea = QScrollArea()
        self.scrollArea.setWidget(self.paramPanel)
        self.scrollArea.setWidgetResizable(True)
        self.tabWidget.addTab(self.scrollArea, self.tr('Parameters'))
        self.webView = QWebView()

        html = None
        url = None
        isText, help = self._alg.help()
        if help is not None:
            if isText:
                html = help
            else:
                url = QUrl(help)
        else:
            html = self.tr('<h2>Sorry, no help is available for this '
                           'algorithm.</h2>')
        try:
            if html:
                self.webView.setHtml(html)
            elif url:
                self.webView.load(url)
        except:
            self.webView.setHtml(self.tr('<h2>Could not open help file :-( </h2>'))
        self.tabWidget.addTab(self.webView, 'Help')
        self.verticalLayout2.addWidget(self.tabWidget)
        self.verticalLayout2.addWidget(self.buttonBox)
        self.setLayout(self.verticalLayout2)
        self.buttonBox.accepted.connect(self.okPressed)
        self.buttonBox.rejected.connect(self.cancelPressed)
        QMetaObject.connectSlotsByName(self)