Source Code for Module node_manager_fkie.select_dialog

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  3  # Copyright (c) 2012, Fraunhofer FKIE/US, Alexander Tiderko 
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 32   
 33  import re 
 34  from python_qt_binding import QtCore, QtGui 
 35   
 36   
 37 -class SelectDialog(QtGui.QDialog): 
 38    ''' 
 39    This dialog creates an input mask for a string list and return selected entries. 
 40    ''' 
 41   
 42 -  def __init__(self, items=list(), buttons=QtGui.QDialogButtonBox.Cancel|QtGui.QDialogButtonBox.Ok, exclusive=False, preselect_all=False, title='', description='', icon='', parent=None, select_if_single=True): 
 43      ''' 
 44      Creates an input dialog. 
 45      @param items: a list with strings 
 46      @type items: C{list()} 
 47      ''' 
 48      QtGui.QDialog.__init__(self, parent=parent) 
 49      self.setObjectName(' - '.join(['SelectDialog', str(items)])) 
 50   
 51      self.verticalLayout = QtGui.QVBoxLayout(self) 
 52      self.verticalLayout.setObjectName("verticalLayout") 
 53      self.verticalLayout.setContentsMargins(1, 1, 1, 1) 
 54   
 55      # add filter row 
 56      self.filter_frame = QtGui.QFrame(self) 
 57      filterLayout = QtGui.QHBoxLayout(self.filter_frame) 
 58      filterLayout.setContentsMargins(1, 1, 1, 1) 
 59      label = QtGui.QLabel("Filter:", self.filter_frame) 
 60      self.filter_field = QtGui.QLineEdit(self.filter_frame) 
 61      filterLayout.addWidget(label) 
 62      filterLayout.addWidget(self.filter_field) 
 63      self.filter_field.textChanged.connect(self._on_filter_changed) 
 64      self.verticalLayout.addWidget(self.filter_frame) 
 65   
 66      if description: 
 67        self.description_frame = QtGui.QFrame(self) 
 68        descriptionLayout = QtGui.QHBoxLayout(self.description_frame) 
 69  #      descriptionLayout.setContentsMargins(1, 1, 1, 1) 
 70        if icon: 
 71          self.icon_label = QtGui.QLabel(self.description_frame) 
 72          self.icon_label.setSizePolicy(QtGui.QSizePolicy.Fixed, QtGui.QSizePolicy.Fixed) 
 73          self.icon_label.setPixmap(QtGui.QPixmap(icon).scaled(30, 30, QtCore.Qt.KeepAspectRatio)) 
 74          descriptionLayout.addWidget(self.icon_label) 
 75        self.description_label = QtGui.QLabel(self.description_frame) 
 76        self.description_label.setWordWrap(True) 
 77        self.description_label.setText(description) 
 78        descriptionLayout.addWidget(self.description_label) 
 79        self.verticalLayout.addWidget(self.description_frame) 
 80   
 81      # create area for the parameter 
 82      self.scrollArea = scrollArea = QtGui.QScrollArea(self); 
 83      self.scrollArea.setFocusPolicy(QtCore.Qt.NoFocus) 
 84      scrollArea.setObjectName("scrollArea") 
 85      scrollArea.setWidgetResizable(True) 
 86      self.content = MainBox(self) 
 87      scrollArea.setWidget(self.content) 
 88      self.verticalLayout.addWidget(scrollArea) 
 89   
 90      # add select all option 
 91      if not exclusive: 
 92        self._ignore_next_toggle = False 
 93        options = QtGui.QWidget(self) 
 94        hLayout = QtGui.QHBoxLayout(options) 
 95        hLayout.setContentsMargins(1, 1, 1, 1) 
 96        self.select_all_checkbox = QtGui.QCheckBox('all') 
 97        self.select_all_checkbox.setTristate(True) 
 98        self.select_all_checkbox.stateChanged.connect(self._on_select_all_checkbox_stateChanged) 
 99        hLayout.addWidget(self.select_all_checkbox) 
100        self.content.toggled.connect(self._on_main_toggle) 
101        # add spacer 
102        spacerItem = QtGui.QSpacerItem(515, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum) 
103        hLayout.addItem(spacerItem) 
104        self.verticalLayout.addWidget(options) 
105   
106      # create buttons 
107      self.buttonBox = QtGui.QDialogButtonBox(self) 
108      self.buttonBox.setObjectName("buttonBox") 
109      self.buttonBox.setOrientation(QtCore.Qt.Horizontal) 
110      self.buttonBox.setStandardButtons(buttons) 
111      self.buttonBox.accepted.connect(self.accept) 
112      self.buttonBox.rejected.connect(self.reject) 
113      self.verticalLayout.addWidget(self.buttonBox) 
114   
115      # set the input fields 
116      if items: 
117        self.content.createFieldsFromValues(items, exclusive) 
118        if (select_if_single and len(items) == 1) or preselect_all: 
119          self.select_all_checkbox.setCheckState(QtCore.Qt.Checked) 
120   
121      if not items or len(items) < 11: 
122        self.filter_frame.setVisible(False) 
123  #    print '=============== create', self.objectName() 
124  # 
125  #  def __del__(self): 
126  #    print "************ destroy", self.objectName() 
127   
128 -  def _on_main_toggle(self, state): 
129      self._ignore_next_toggle = state != self.select_all_checkbox.checkState() 
130      self.select_all_checkbox.setCheckState(state) 
131   
132 -  def _on_select_all_checkbox_stateChanged(self, state): 
133      if not self._ignore_next_toggle: 
134        self.content.setState(state) 
135      self._ignore_next_toggle = False 
136   
137 -  def _on_filter_changed(self): 
138      self.content.filter(self.filter_field.text()) 
139   
140 -  def getSelected(self): 
141      return self.content.getSelected() 
142   
143    @staticmethod 
144 -  def getValue(title, description='', items=list(), exclusive=False, preselect_all=False, icon='', parent=None, select_if_single=True): 
145      selectDia = SelectDialog(items, exclusive=exclusive, preselect_all=preselect_all, description=description, icon=icon, parent=parent, select_if_single=select_if_single) 
146      selectDia.setWindowTitle(title) 
147      selectDia.resize(480, 256) 
148      if selectDia.exec_(): 
149        return selectDia.getSelected(), True 
150      return list(), False 
151   
152   
153  #%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
154  #%%%%%%%%%%%%%%%%%% close handling                        %%%%%%%%%%%%%%%%%%%%% 
155  #%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
156   
157 -  def accept(self): 
158      self.setResult(QtGui.QDialog.Accepted) 
159      self.hide() 
160     
161 -  def reject(self): 
162      self.setResult(QtGui.QDialog.Rejected) 
163      self.hide() 
164   
165 -  def hideEvent(self, event): 
166      self.close() 
167   
168 -  def closeEvent (self, event): 
169      ''' 
170      Test the open files for changes and save this if needed. 
171      ''' 
172      self.setAttribute(QtCore.Qt.WA_DeleteOnClose, True) 
173      QtGui.QDialog.closeEvent(self, event) 
174   
175   
176 -class MainBox(QtGui.QWidget): 
177    ''' 
178    A widget with entries. 
179    ''' 
180     
181    toggled = QtCore.Signal(QtCore.Qt.CheckState) 
182     
183 -  def __init__(self, parent=None): 
184      QtGui.QWidget.__init__(self, parent) 
185      self.setObjectName("MainBox") 
186      self.__on_intern_change = False 
187      boxLayout = QtGui.QFormLayout() 
188      boxLayout.setVerticalSpacing(0) 
189      self.setLayout(boxLayout) 
190   
191 -  def createFieldsFromValues(self, values, exclusive=False): 
192      self.setUpdatesEnabled(False) 
193      try: 
194        if isinstance(values, list): 
195          for v in values: 
196            checkbox = QtGui.QCheckBox(v) 
197            checkbox.toggled.connect(self._on_checkbox_toggled) 
198            checkbox.setObjectName(v) 
199            checkbox.setAutoExclusive(exclusive) 
200            self.layout().addRow(checkbox) 
201      finally: 
202        self.setUpdatesEnabled(True) 
203   
204 -  def _on_checkbox_toggled(self): 
205      if not self.__on_intern_change: 
206        l = self.getSelected() 
207        if len(l) == 0: 
208          self.toggled.emit(QtCore.Qt.Unchecked) 
209        elif len(l) == self.layout().count(): 
210          self.toggled.emit(QtCore.Qt.Checked) 
211        else: 
212          self.toggled.emit(QtCore.Qt.PartiallyChecked) 
213   
214 -  def filter(self, arg): 
215      ''' 
216      Hide the parameter input field, which label dosn't contains the C{arg}. 
217      @param arg: the filter text 
218      @type art: C{str} 
219      ''' 
220      for i in range(self.layout().count()): 
221        item = self.layout().itemAt(i).widget() 
222        if isinstance(item, QtGui.QCheckBox): 
223          new_state = (not re.search(arg, item.objectName()) is None) 
224          item.setVisible(new_state) 
225          if new_state: 
226            self._on_checkbox_toggled() 
227   
228 -  def getSelected(self): 
229      result = list() 
230      for i in range(self.layout().count()): 
231        item = self.layout().itemAt(i).widget() 
232        if isinstance(item, QtGui.QCheckBox): 
233          if item.isChecked(): 
234            result.append(item.text()) 
235      return result 
236     
237 -  def setState(self, state): 
238      self.__on_intern_change = True 
239      for i in range(self.layout().count()): 
240        item = self.layout().itemAt(i).widget() 
241        if isinstance(item, QtGui.QCheckBox): 
242          if state == QtCore.Qt.Checked: 
243            item.setCheckState(QtCore.Qt.Checked) 
244          elif state == QtCore.Qt.Unchecked: 
245            item.setCheckState(QtCore.Qt.Unchecked) 
246          elif state == QtCore.Qt.PartiallyChecked and item.isVisible(): 
247            item.setCheckState(QtCore.Qt.Checked) 
248      self.__on_intern_change = False 
249      self._on_checkbox_toggled() 
250