Example #1
0
class MultilineTextPanel(QWidget):

    USE_TEXT = 0

    def __init__(self, options, parent=None):
        super(MultilineTextPanel, self).__init__(parent)
        self.options = options
        self.verticalLayout = QVBoxLayout(self)
        self.verticalLayout.setSpacing(2)
        self.verticalLayout.setMargin(0)
        self.combo = QComboBox()
        self.combo.addItem(self.tr('[Use text below]'))
        for option in options:
            self.combo.addItem(option[0], option[1])
        self.combo.setSizePolicy(QSizePolicy.Expanding,
                                 QSizePolicy.Expanding)
        self.verticalLayout.addWidget(self.combo)
        self.textBox = QPlainTextEdit()
        self.verticalLayout.addWidget(self.textBox)
        self.setLayout(self.verticalLayout)

    def setText(self, text):
        self.textBox.setPlainText(text)

    def getOption(self):
        return self.combo.currentIndex()

    def getValue(self):
        if self.combo.currentIndex() == 0:
            return unicode(self.textBox.toPlainText())
        else:
            return self.combo.itemData(self.combo.currentIndex())

    def setValue(self, value):
        items = [self.combo.itemData(i) for i in range(1, self.combo.count())]
        for idx, item in enumerate(items):
            if item == value:
                self.combo.setCurrentIndex(idx)
                return
        self.combo.setCurrentIndex(0)
        if value:
            self.textBox.setPlainText(value)
Example #2
0
class MultilineTextPanel(QWidget):

    USE_TEXT = 0

    def __init__(self, options, parent=None):
        super(MultilineTextPanel, self).__init__(parent)
        self.options = options
        self.verticalLayout = QVBoxLayout(self)
        self.verticalLayout.setSpacing(2)
        self.verticalLayout.setMargin(0)
        self.combo = QComboBox()
        self.combo.addItem(self.tr('[Use text below]'))
        for option in options:
            self.combo.addItem(option[0], option[1])
        self.combo.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        self.verticalLayout.addWidget(self.combo)
        self.textBox = QPlainTextEdit()
        self.verticalLayout.addWidget(self.textBox)
        self.setLayout(self.verticalLayout)

    def setText(self, text):
        self.textBox.setPlainText(text)

    def getOption(self):
        return self.combo.currentIndex()

    def getValue(self):
        if self.combo.currentIndex() == 0:
            return unicode(self.textBox.toPlainText())
        else:
            return self.combo.itemData(self.combo.currentIndex())

    def setValue(self, value):
        items = [self.combo.itemData(i) for i in range(1, self.combo.count())]
        for idx, item in enumerate(items):
            if item == value:
                self.combo.setCurrentIndex(idx)
                return
        self.combo.setCurrentIndex(0)
        if value:
            self.textBox.setPlainText(value)
class ModelerParameterDefinitionDialog(QDialog):

    PARAMETER_NUMBER = 'Number'
    PARAMETER_RASTER = 'Raster layer'
    PARAMETER_TABLE = 'Table'
    PARAMETER_VECTOR = 'Vector layer'
    PARAMETER_STRING = 'String'
    PARAMETER_BOOLEAN = 'Boolean'
    PARAMETER_TABLE_FIELD = 'Table field'
    PARAMETER_EXTENT = 'Extent'
    PARAMETER_FILE = 'File'
    PARAMETER_POINT = 'Point'

    # To add
    PARAMETER_MULTIPLE = 'Multiple input'
    PARAMETER_FIXED_TABLE = 'Fixed table'

    paramTypes = [
        PARAMETER_BOOLEAN,
        PARAMETER_EXTENT,
        PARAMETER_FILE,
        PARAMETER_NUMBER,
        PARAMETER_RASTER,
        PARAMETER_STRING,
        PARAMETER_TABLE,
        PARAMETER_TABLE_FIELD,
        PARAMETER_VECTOR,
        PARAMETER_POINT
    ]

    def __init__(self, alg, paramType=None, param=None):
        self.alg = alg
        self.paramType = paramType
        self.param = param
        QDialog.__init__(self)
        self.setModal(True)
        self.setupUi()

    def setupUi(self):
        self.setWindowTitle(self.tr('Parameter definition'))

        self.verticalLayout = QVBoxLayout(self)
        self.verticalLayout.setSpacing(40)
        self.verticalLayout.setMargin(20)

        self.horizontalLayout = QHBoxLayout(self)
        self.horizontalLayout.setSpacing(2)
        self.horizontalLayout.setMargin(0)
        self.label = QLabel(self.tr('Parameter name'))
        self.horizontalLayout.addWidget(self.label)
        self.nameTextBox = QLineEdit()
        self.horizontalLayout.addWidget(self.nameTextBox)
        self.verticalLayout.addLayout(self.horizontalLayout)

        self.horizontalLayout2 = QHBoxLayout(self)
        self.horizontalLayout2.setSpacing(2)
        self.horizontalLayout2.setMargin(0)
        self.horizontalLayout3 = QHBoxLayout(self)
        self.horizontalLayout3.setSpacing(2)
        self.horizontalLayout3.setMargin(0)
        self.horizontalLayout4 = QHBoxLayout(self)
        self.horizontalLayout4.setSpacing(2)
        self.horizontalLayout4.setMargin(0)

        if isinstance(self.param, Parameter):
            self.nameTextBox.setText(self.param.description)

        if self.paramType == ModelerParameterDefinitionDialog.PARAMETER_BOOLEAN or \
           isinstance(self.param, ParameterBoolean):
            self.state = QCheckBox()
            self.state.setText(self.tr('Checked'))
            self.state.setChecked(False)
            if self.param is not None:
                self.state.setChecked(True if self.param.value else False)
            self.horizontalLayout3.addWidget(self.state)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_TABLE_FIELD or \
                isinstance(self.param, ParameterTableField):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Parent layer')))
            self.parentCombo = QComboBox()
            idx = 0
            for param in self.alg.inputs.values():
                if isinstance(param.param, (ParameterVector, ParameterTable)):
                    self.parentCombo.addItem(param.param.description, param.param.name)
                    if self.param is not None:
                        if self.param.parent == param.param.name:
                            self.parentCombo.setCurrentIndex(idx)
                    idx += 1
            self.horizontalLayout3.addWidget(self.parentCombo)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_VECTOR or \
                isinstance(self.param, ParameterVector):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Shape type')))
            self.shapetypeCombo = QComboBox()
            self.shapetypeCombo.addItem(self.tr('Any'))
            self.shapetypeCombo.addItem(self.tr('Point'))
            self.shapetypeCombo.addItem(self.tr('Line'))
            self.shapetypeCombo.addItem(self.tr('Polygon'))
            if self.param is not None:
                self.shapetypeCombo.setCurrentIndex(self.param.shapetype[0] + 1)
            self.horizontalLayout3.addWidget(self.shapetypeCombo)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_MULTIPLE or \
                isinstance(self.param, ParameterMultipleInput):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Data type')))
            self.datatypeCombo = QComboBox()
            self.datatypeCombo.addItem(self.tr('Vector (any)'))
            self.datatypeCombo.addItem(self.tr('Vector (point)'))
            self.datatypeCombo.addItem(self.tr('Vector (line)'))
            self.datatypeCombo.addItem(self.tr('Vector (polygon)'))
            self.datatypeCombo.addItem(self.tr('Raster'))
            self.datatypeCombo.addItem(self.tr('Table'))
            if self.param is not None:
                self.datatypeCombo.setCurrentIndex(self.param.datatype + 1)
            self.horizontalLayout3.addWidget(self.datatypeCombo)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_NUMBER or \
                isinstance(self.param, ParameterNumber):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Min/Max values')))
            self.minTextBox = QLineEdit()
            self.maxTextBox = QLineEdit()
            if self.param is not None:
                self.minTextBox.setText(unicode(self.param.min))
                self.maxTextBox.setText(unicode(self.param.max))
            self.horizontalLayout3.addWidget(self.minTextBox)
            self.horizontalLayout3.addWidget(self.maxTextBox)
            self.verticalLayout.addLayout(self.horizontalLayout3)
            self.horizontalLayout4.addWidget(QLabel(self.tr('Default value')))
            self.defaultTextBox = QLineEdit()
            self.defaultTextBox.setText(self.tr('0'))
            if self.param is not None:
                default = self.param.default
                if self.param.isInteger:
                    default = int(math.floor(default))
                self.defaultTextBox.setText(unicode(default))
            self.horizontalLayout4.addWidget(self.defaultTextBox)
            self.verticalLayout.addLayout(self.horizontalLayout4)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_STRING or \
                isinstance(self.param, ParameterString):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Default value')))
            self.defaultTextBox = QLineEdit()
            if self.param is not None:
                self.defaultTextBox.setText(self.param.default)
            self.horizontalLayout3.addWidget(self.defaultTextBox)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_FILE or \
                isinstance(self.param, ParameterFile):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Type')))
            self.fileFolderCombo = QComboBox()
            self.fileFolderCombo.addItem(self.tr('File'))
            self.fileFolderCombo.addItem(self.tr('Folder'))
            if self.param is not None:
                self.fileFolderCombo.setCurrentIndex(
                    1 if self.param.isFolder else 0)
            self.horizontalLayout3.addWidget(self.fileFolderCombo)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_POINT or \
                isinstance(self.param, ParameterPoint):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Default value')))
            self.defaultTextBox = QLineEdit()
            if self.param is not None:
                self.defaultTextBox.setText(self.param.default)
            self.horizontalLayout3.addWidget(self.defaultTextBox)
            self.verticalLayout.addLayout(self.horizontalLayout3)

        self.horizontalLayout2.addWidget(QLabel(self.tr('Required')))
        self.yesNoCombo = QComboBox()
        self.yesNoCombo.addItem(self.tr('Yes'))
        self.yesNoCombo.addItem(self.tr('No'))
        self.horizontalLayout2.addWidget(self.yesNoCombo)
        if self.param is not None:
            self.yesNoCombo.setCurrentIndex(
                1 if self.param.optional else 0)
        self.verticalLayout.addLayout(self.horizontalLayout2)

        self.buttonBox = QDialogButtonBox(self)
        self.buttonBox.setOrientation(Qt.Horizontal)
        self.buttonBox.setStandardButtons(QDialogButtonBox.Cancel
                                          | QDialogButtonBox.Ok)
        self.buttonBox.setObjectName('buttonBox')
        self.buttonBox.accepted.connect(self.okPressed)
        self.buttonBox.rejected.connect(self.cancelPressed)

        self.verticalLayout.addWidget(self.buttonBox)

        self.setLayout(self.verticalLayout)

    def okPressed(self):
        description = unicode(self.nameTextBox.text())
        if description.strip() == '':
            QMessageBox.warning(self, self.tr('Unable to define parameter'),
                                self.tr('Invalid parameter name'))
            return
        if self.param is None:
            validChars = \
                'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
            safeName = ''.join(c for c in description if c in validChars)
            name = safeName.lower()
            i = 2
            while name in self.alg.inputs:
                name = safeName.lower() + str(i)
        else:
            name = self.param.name
        if self.paramType \
                == ModelerParameterDefinitionDialog.PARAMETER_BOOLEAN \
                or isinstance(self.param, ParameterBoolean):
            self.param = ParameterBoolean(name, description,
                                          self.state.isChecked())
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_TABLE_FIELD or \
                isinstance(self.param, ParameterTableField):
            if self.parentCombo.currentIndex() < 0:
                QMessageBox.warning(self, self.tr('Unable to define parameter'),
                                    self.tr('Wrong or missing parameter values'))
                return
            parent = self.parentCombo.itemData(self.parentCombo.currentIndex())
            self.param = ParameterTableField(name, description, parent)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_RASTER or \
                isinstance(self.param, ParameterRaster):
            self.param = ParameterRaster(
                name, description,
                self.yesNoCombo.currentIndex() == 1)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_TABLE or \
                isinstance(self.param, ParameterTable):
            self.param = ParameterTable(
                name, description,
                self.yesNoCombo.currentIndex() == 1)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_VECTOR or \
                isinstance(self.param, ParameterVector):
            self.param = ParameterVector(
                name, description,
                [self.shapetypeCombo.currentIndex() - 1],
                self.yesNoCombo.currentIndex() == 1)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_MULTIPLE or \
                isinstance(self.param, ParameterMultipleInput):
            self.param = ParameterMultipleInput(
                name, description,
                self.datatypeCombo.currentIndex() - 1,
                self.yesNoCombo.currentIndex() == 1)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_NUMBER or \
                isinstance(self.param, ParameterNumber):
            try:
                vmin = unicode(self.minTextBox.text()).strip()
                if vmin == '':
                    vmin = None
                else:
                    vmin = float(vmin)
                vmax = unicode(self.maxTextBox.text()).strip()
                if vmax == '':
                    vmax = None
                else:
                    vmax = float(vmax)
                self.param = ParameterNumber(name, description, vmin, vmax,
                                             unicode(self.defaultTextBox.text()))
            except:
                QMessageBox.warning(self, self.tr('Unable to define parameter'),
                                    self.tr('Wrong or missing parameter values'))
                return
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_STRING or \
                isinstance(self.param, ParameterString):
            self.param = ParameterString(name, description,
                                         unicode(self.defaultTextBox.text()))
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_EXTENT or \
                isinstance(self.param, ParameterExtent):
            self.param = ParameterExtent(name, description)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_FILE or \
                isinstance(self.param, ParameterFile):
            isFolder = self.fileFolderCombo.currentIndex() == 1
            self.param = ParameterFile(name, description, isFolder=isFolder)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_POINT or \
                isinstance(self.param, ParameterPoint):
            self.param = ParameterPoint(name, description,
                                        unicode(self.defaultTextBox.text()))
        self.param.optional = self.yesNoCombo.currentIndex() == 1
        self.close()

    def cancelPressed(self):
        self.param = None
        self.close()
Example #4
0
class ModelerParameterDefinitionDialog(QDialog):

    PARAMETER_NUMBER = 'Number'
    PARAMETER_RASTER = 'Raster layer'
    PARAMETER_TABLE = 'Table'
    PARAMETER_VECTOR = 'Vector layer'
    PARAMETER_STRING = 'String'
    PARAMETER_BOOLEAN = 'Boolean'
    PARAMETER_TABLE_FIELD = 'Table field'
    PARAMETER_EXTENT = 'Extent'
    PARAMETER_FILE = 'File'
    PARAMETER_POINT = 'Point'

    # To add
    PARAMETER_MULTIPLE = 'Multiple input'
    PARAMETER_FIXED_TABLE = 'Fixed table'

    paramTypes = [
        PARAMETER_BOOLEAN, PARAMETER_EXTENT, PARAMETER_FILE, PARAMETER_NUMBER,
        PARAMETER_RASTER, PARAMETER_STRING, PARAMETER_TABLE,
        PARAMETER_TABLE_FIELD, PARAMETER_VECTOR, PARAMETER_POINT
    ]

    def __init__(self, alg, paramType=None, param=None):
        self.alg = alg
        self.paramType = paramType
        self.param = param
        QDialog.__init__(self)
        self.setModal(True)
        self.setupUi()

    def setupUi(self):
        self.setWindowTitle(self.tr('Parameter definition'))

        self.verticalLayout = QVBoxLayout(self)
        self.verticalLayout.setSpacing(40)
        self.verticalLayout.setMargin(20)

        self.horizontalLayout = QHBoxLayout(self)
        self.horizontalLayout.setSpacing(2)
        self.horizontalLayout.setMargin(0)
        self.label = QLabel(self.tr('Parameter name'))
        self.horizontalLayout.addWidget(self.label)
        self.nameTextBox = QLineEdit()
        self.horizontalLayout.addWidget(self.nameTextBox)
        self.verticalLayout.addLayout(self.horizontalLayout)

        self.horizontalLayout2 = QHBoxLayout(self)
        self.horizontalLayout2.setSpacing(2)
        self.horizontalLayout2.setMargin(0)
        self.horizontalLayout3 = QHBoxLayout(self)
        self.horizontalLayout3.setSpacing(2)
        self.horizontalLayout3.setMargin(0)
        self.horizontalLayout4 = QHBoxLayout(self)
        self.horizontalLayout4.setSpacing(2)
        self.horizontalLayout4.setMargin(0)

        if isinstance(self.param, Parameter):
            self.nameTextBox.setText(self.param.description)

        if self.paramType == ModelerParameterDefinitionDialog.PARAMETER_BOOLEAN or \
           isinstance(self.param, ParameterBoolean):
            self.state = QCheckBox()
            self.state.setText(self.tr('Checked'))
            self.state.setChecked(False)
            if self.param is not None:
                self.state.setChecked(True if self.param.value else False)
            self.horizontalLayout3.addWidget(self.state)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_TABLE_FIELD or \
                isinstance(self.param, ParameterTableField):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Parent layer')))
            self.parentCombo = QComboBox()
            idx = 0
            for param in self.alg.inputs.values():
                if isinstance(param.param, (ParameterVector, ParameterTable)):
                    self.parentCombo.addItem(param.param.description,
                                             param.param.name)
                    if self.param is not None:
                        if self.param.parent == param.param.name:
                            self.parentCombo.setCurrentIndex(idx)
                    idx += 1
            self.horizontalLayout3.addWidget(self.parentCombo)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_VECTOR or \
                isinstance(self.param, ParameterVector):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Shape type')))
            self.shapetypeCombo = QComboBox()
            self.shapetypeCombo.addItem(self.tr('Any'))
            self.shapetypeCombo.addItem(self.tr('Point'))
            self.shapetypeCombo.addItem(self.tr('Line'))
            self.shapetypeCombo.addItem(self.tr('Polygon'))
            if self.param is not None:
                self.shapetypeCombo.setCurrentIndex(self.param.shapetype[0] +
                                                    1)
            self.horizontalLayout3.addWidget(self.shapetypeCombo)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_MULTIPLE or \
                isinstance(self.param, ParameterMultipleInput):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Data type')))
            self.datatypeCombo = QComboBox()
            self.datatypeCombo.addItem(self.tr('Vector (any)'))
            self.datatypeCombo.addItem(self.tr('Vector (point)'))
            self.datatypeCombo.addItem(self.tr('Vector (line)'))
            self.datatypeCombo.addItem(self.tr('Vector (polygon)'))
            self.datatypeCombo.addItem(self.tr('Raster'))
            self.datatypeCombo.addItem(self.tr('Table'))
            if self.param is not None:
                self.datatypeCombo.setCurrentIndex(self.param.datatype + 1)
            self.horizontalLayout3.addWidget(self.datatypeCombo)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_NUMBER or \
                isinstance(self.param, ParameterNumber):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Min/Max values')))
            self.minTextBox = QLineEdit()
            self.maxTextBox = QLineEdit()
            if self.param is not None:
                self.minTextBox.setText(unicode(self.param.min))
                self.maxTextBox.setText(unicode(self.param.max))
            self.horizontalLayout3.addWidget(self.minTextBox)
            self.horizontalLayout3.addWidget(self.maxTextBox)
            self.verticalLayout.addLayout(self.horizontalLayout3)
            self.horizontalLayout4.addWidget(QLabel(self.tr('Default value')))
            self.defaultTextBox = QLineEdit()
            self.defaultTextBox.setText(self.tr('0'))
            if self.param is not None:
                default = self.param.default
                if self.param.isInteger:
                    default = int(math.floor(default))
                self.defaultTextBox.setText(unicode(default))
            self.horizontalLayout4.addWidget(self.defaultTextBox)
            self.verticalLayout.addLayout(self.horizontalLayout4)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_STRING or \
                isinstance(self.param, ParameterString):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Default value')))
            self.defaultTextBox = QLineEdit()
            if self.param is not None:
                self.defaultTextBox.setText(self.param.default)
            self.horizontalLayout3.addWidget(self.defaultTextBox)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_FILE or \
                isinstance(self.param, ParameterFile):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Type')))
            self.fileFolderCombo = QComboBox()
            self.fileFolderCombo.addItem(self.tr('File'))
            self.fileFolderCombo.addItem(self.tr('Folder'))
            if self.param is not None:
                self.fileFolderCombo.setCurrentIndex(
                    1 if self.param.isFolder else 0)
            self.horizontalLayout3.addWidget(self.fileFolderCombo)
            self.verticalLayout.addLayout(self.horizontalLayout3)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_POINT or \
                isinstance(self.param, ParameterPoint):
            self.horizontalLayout3.addWidget(QLabel(self.tr('Default value')))
            self.defaultTextBox = QLineEdit()
            if self.param is not None:
                self.defaultTextBox.setText(self.param.default)
            self.horizontalLayout3.addWidget(self.defaultTextBox)
            self.verticalLayout.addLayout(self.horizontalLayout3)

        self.horizontalLayout2.addWidget(QLabel(self.tr('Required')))
        self.yesNoCombo = QComboBox()
        self.yesNoCombo.addItem(self.tr('Yes'))
        self.yesNoCombo.addItem(self.tr('No'))
        self.horizontalLayout2.addWidget(self.yesNoCombo)
        if self.param is not None:
            self.yesNoCombo.setCurrentIndex(1 if self.param.optional else 0)
        self.verticalLayout.addLayout(self.horizontalLayout2)

        self.buttonBox = QDialogButtonBox(self)
        self.buttonBox.setOrientation(Qt.Horizontal)
        self.buttonBox.setStandardButtons(QDialogButtonBox.Cancel
                                          | QDialogButtonBox.Ok)
        self.buttonBox.setObjectName('buttonBox')
        self.buttonBox.accepted.connect(self.okPressed)
        self.buttonBox.rejected.connect(self.cancelPressed)

        self.verticalLayout.addWidget(self.buttonBox)

        self.setLayout(self.verticalLayout)

    def okPressed(self):
        description = unicode(self.nameTextBox.text())
        if description.strip() == '':
            QMessageBox.warning(self, self.tr('Unable to define parameter'),
                                self.tr('Invalid parameter name'))
            return
        if self.param is None:
            validChars = \
                'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
            safeName = ''.join(c for c in description if c in validChars)
            name = safeName.lower()
            i = 2
            while name in self.alg.inputs:
                name = safeName.lower() + str(i)
        else:
            name = self.param.name
        if self.paramType \
                == ModelerParameterDefinitionDialog.PARAMETER_BOOLEAN \
                or isinstance(self.param, ParameterBoolean):
            self.param = ParameterBoolean(name, description,
                                          self.state.isChecked())
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_TABLE_FIELD or \
                isinstance(self.param, ParameterTableField):
            if self.parentCombo.currentIndex() < 0:
                QMessageBox.warning(
                    self, self.tr('Unable to define parameter'),
                    self.tr('Wrong or missing parameter values'))
                return
            parent = self.parentCombo.itemData(self.parentCombo.currentIndex())
            self.param = ParameterTableField(name, description, parent)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_RASTER or \
                isinstance(self.param, ParameterRaster):
            self.param = ParameterRaster(name, description,
                                         self.yesNoCombo.currentIndex() == 1)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_TABLE or \
                isinstance(self.param, ParameterTable):
            self.param = ParameterTable(name, description,
                                        self.yesNoCombo.currentIndex() == 1)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_VECTOR or \
                isinstance(self.param, ParameterVector):
            self.param = ParameterVector(
                name, description, [self.shapetypeCombo.currentIndex() - 1],
                self.yesNoCombo.currentIndex() == 1)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_MULTIPLE or \
                isinstance(self.param, ParameterMultipleInput):
            self.param = ParameterMultipleInput(
                name, description,
                self.datatypeCombo.currentIndex() - 1,
                self.yesNoCombo.currentIndex() == 1)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_NUMBER or \
                isinstance(self.param, ParameterNumber):
            try:
                vmin = unicode(self.minTextBox.text()).strip()
                if vmin == '':
                    vmin = None
                else:
                    vmin = float(vmin)
                vmax = unicode(self.maxTextBox.text()).strip()
                if vmax == '':
                    vmax = None
                else:
                    vmax = float(vmax)
                self.param = ParameterNumber(
                    name, description, vmin, vmax,
                    unicode(self.defaultTextBox.text()))
            except:
                QMessageBox.warning(
                    self, self.tr('Unable to define parameter'),
                    self.tr('Wrong or missing parameter values'))
                return
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_STRING or \
                isinstance(self.param, ParameterString):
            self.param = ParameterString(name, description,
                                         unicode(self.defaultTextBox.text()))
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_EXTENT or \
                isinstance(self.param, ParameterExtent):
            self.param = ParameterExtent(name, description)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_FILE or \
                isinstance(self.param, ParameterFile):
            isFolder = self.fileFolderCombo.currentIndex() == 1
            self.param = ParameterFile(name, description, isFolder=isFolder)
        elif self.paramType == ModelerParameterDefinitionDialog.PARAMETER_POINT or \
                isinstance(self.param, ParameterPoint):
            self.param = ParameterPoint(name, description,
                                        unicode(self.defaultTextBox.text()))
        self.param.optional = self.yesNoCombo.currentIndex() == 1
        self.close()

    def cancelPressed(self):
        self.param = None
        self.close()