# Copyright 2008 Nanorex, Inc.  See LICENSE file for details.
"""
@author: Ninad
@version: $Id$
@copyright:2008 Nanorex, Inc.  See LICENSE file for details.

History:
2008-05-09 Created

TODO: as of 2008-01-18
- See MultipleDnaSegmentResize_EditCommand for details.
- need to implement model_changed method
"""
from PyQt4.Qt import Qt, SIGNAL
from PM.PM_GroupBox      import PM_GroupBox
from PM.PM_Constants     import PM_DONE_BUTTON
from PM.PM_Constants     import PM_WHATS_THIS_BUTTON
from PM.PM_ToolButton    import PM_ToolButton
from PM.PM_WidgetRow     import PM_WidgetRow
from PM.PM_SelectionListWidget import PM_SelectionListWidget
from utilities.constants import lightred_1, lightgreen_2
from geometry.VQT import V
from utilities.debug import print_compact_stack
from utilities       import debug_flags
from utilities.Comparison import same_vals
from command_support.DnaOrCnt_PropertyManager   import DnaOrCnt_PropertyManager
from utilities.Log import redmsg

from utilities.prefs_constants import dnaSegmentEditCommand_cursorTextCheckBox_length_prefs_key
from utilities.prefs_constants import dnaSegmentEditCommand_cursorTextCheckBox_numberOfBasePairs_prefs_key
from utilities.prefs_constants import dnaSegmentEditCommand_cursorTextCheckBox_changedBasePairs_prefs_key
from utilities.prefs_constants import dnaSegmentEditCommand_showCursorTextCheckBox_prefs_key

from widgets.prefs_widgets import connect_checkbox_with_boolean_pref

_superclass = DnaOrCnt_PropertyManager
class MultipleDnaSegmentResize_PropertyManager( DnaOrCnt_PropertyManager ):

    title         =  "Resize Dna Segments"
    iconPath      =  "ui/actions/Properties Manager/Resize_Multiple_Segments.png"

    def __init__( self, command ):
        """
        Constructor for the Build DNA property manager.
        """


        self.endPoint1 = V(0, 0, 0)
        self.endPoint2 = V(0, 0, 0)

        self._numberOfBases = 0
        self._conformation = 'B-DNA'
        self.duplexRise = 3.18
        self.basesPerTurn = 10
        self.dnaModel = 'PAM3'

        _superclass.__init__( self,  command)

        self.showTopRowButtons( PM_DONE_BUTTON | \
                                PM_WHATS_THIS_BUTTON)

        msg = "Use resize handles to resize the segments."
        self.updateMessage(msg)

    def connect_or_disconnect_signals(self, isConnect):
        """
        Connect or disconnect widget signals sent to their slot methods.
        This can be overridden in subclasses. By default it does nothing.
        @param isConnect: If True the widget will send the signals to the slot
                          method.
        @type  isConnect: boolean
        """
        #TODO: This is a temporary fix for a bug. When you invoke a
        #temporary mode  entering such a temporary mode keeps the signals of
        #PM from the previous mode connected (
        #but while exiting that temporary mode and reentering the
        #previous mode, it atucally reconnects the signal! This gives rise to
        #lots  of bugs. This needs more general fix in Temporary mode API.
        # -- Ninad 2008-01-09 (similar comment exists in MovePropertyManager.py

        if isConnect and self.isAlreadyConnected:
            if debug_flags.atom_debug:
                print_compact_stack("warning: attempt to connect widgets"\
                                    "in this PM that are already connected." )
            return

        if not isConnect and self.isAlreadyDisconnected:
            if debug_flags.atom_debug:
                print_compact_stack("warning: attempt to disconnect widgets"\
                                    "in this PM that are already disconnected.")
            return

        self.isAlreadyConnected = isConnect
        self.isAlreadyDisconnected = not isConnect

        if isConnect:
            change_connect = self.win.connect
        else:
            change_connect = self.win.disconnect

        self.segmentListWidget.connect_or_disconnect_signals(isConnect)
        change_connect(self.addSegmentsToolButton,
                        SIGNAL("toggled(bool)"),
                        self.activateAddSegmentsTool)
        change_connect(self.removeSegmentsToolButton,
                        SIGNAL("toggled(bool)"),
                        self.activateRemoveSegmentsTool)

    def _update_UI_do_updates(self):
        """
        @see: Command_PropertyManager._update_UI_do_updates()
        @see: DnaSegment_EditCommand.model_changed()
        @see: DnaSegment_EditCommand.hasResizableStructure()
        @see: self._current_model_changed_params()
        """

        currentParams = self._current_model_changed_params()

        #Optimization. Return from the model_changed method if the
        #params are the same.
        if same_vals(currentParams, self._previous_model_changed_params):
            return

        number_of_segments, isStructResizable, why_not = currentParams

        #update the self._previous_model_changed_params with this new param set.
        self._previous_model_changed_params = currentParams

        if not isStructResizable:
            if not number_of_segments == 0:
                #disable all widgets
                self._pmGroupBox1.setEnabled(False)
            msg = redmsg("DnaSegment is not resizable. Reason: %s"%(why_not))
            self.updateMessage(msg)
        else:
            if not self._pmGroupBox1.isEnabled():
                self._pmGroupBox1.setEnabled(True)
            msg = "Use resize handles to resize the segments"
            self.updateMessage(msg)

        self.updateListWidgets()
        ##self.command.updateHandlePositions()


    def _current_model_changed_params(self):
        """
        Returns a tuple containing the parameters that will be compared
        against the previously stored parameters. This provides a quick test
        to determine whether to do more things in self.model_changed()
        @see: self.model_changed() which calls this
        @see: self._previous_model_changed_params attr.
        """
        params = None

        if self.command:
            #update the list first.
            self.command.updateResizeSegmentList()
            number_of_segments = len(self.command.getResizeSegmentList())
            isStructResizable, why_not = self.command.hasResizableStructure()
            params = (number_of_segments, isStructResizable, why_not)

        return params

    def isAddSegmentsToolActive(self):
        """
        Returns True if the add segments tool (which adds the segments to the
        list of segments to be resized) is active
        """

        if self.addSegmentsToolButton.isChecked():
            #For safety
            if not self.removeSegmentsToolButton.isChecked():
                return True

        return False


    def isRemoveSegmentsToolActive(self):
        """
        Returns True if the remove segments tool (which removes the segments
        from the list of segments to be resized) is active
        """
        if self.removeSegmentsToolButton.isChecked():
            if not self.addSegmentsToolButton.isChecked():
                #For safety
                return True
        return False

    def activateAddSegmentsTool(self,enable):
        """
        Change the appearance of the list widget (that lists the dna segments
        to be resized) so as to indicate that the add dna segments tool is
        active
        @param enable: If True, changes the appearance of list widget to
                       indicate that the add segments tool is active.
        @type  enable: bool
        """
        if enable:
            if not self.addSegmentsToolButton.isChecked():
                self.addSegmentsToolButton.setChecked(True)
            if self.removeSegmentsToolButton.isChecked():
                self.removeSegmentsToolButton.setChecked(False)
            self.segmentListWidget.setAlternatingRowColors(False)
            self.segmentListWidget.setColor(lightgreen_2)
        else:
            if self.addSegmentsToolButton.isChecked():
                self.addSegmentsToolButton.setChecked(False)
            self.segmentListWidget.setAlternatingRowColors(True)
            self.segmentListWidget.resetColor()

    def activateRemoveSegmentsTool(self,enable):
        """
        Change the appearance of the list widget (that lists the dna segments
        to be resized) so as to indicate that the REMOVE dna segments tool is
        active
        @param enable: If True, changes the appearance of list widget to
                       indicate that the REMOVE segments tool is active.
        @type  enable: bool
        """
        if enable:
            if not self.removeSegmentsToolButton.isChecked():
                self.removeSegmentsToolButton.setChecked(True)
            if self.addSegmentsToolButton.isChecked():
                self.addSegmentsToolButton.setChecked(False)
            self.segmentListWidget.setAlternatingRowColors(False)

            self.segmentListWidget.setColor(lightred_1)
        else:
            if self.removeSegmentsToolButton.isChecked():
                self.removeSegmentsToolButton.setChecked(False)
            self.segmentListWidget.setAlternatingRowColors(True)
            self.segmentListWidget.resetColor()

    def removeListWidgetItems(self):
        """
        Removes selected atoms from the resize dna segment list widget
        Example: User selects a bunch of items in the list widget and hits
        delete key  to remove the selected items from the list
        IMPORTANT NOTE: This method does NOT delete the correspoinging model
        item in the GLPane (i.e. corresponding dnasegment). It just 'removes'
        the item from the list widget (indicating its no longer being resized)
        This is intentional.
        """
        self.segmentListWidget.deleteSelection()
        itemDict = self.segmentListWidget.getItemDictonary()
        self.command.setResizeStructList(itemDict.values())
        self.updateListWidgets()
        self.win.win_update()


    def _addGroupBoxes( self ):
        """
        Add the Property Manager group boxes.
        """
        self._pmGroupBox1 = PM_GroupBox( self, title = "Segments for Resizing" )
        self._loadGroupBox1( self._pmGroupBox1 )

        self._displayOptionsGroupBox = PM_GroupBox( self,
                                                    title = "Display Options" )
        self._loadDisplayOptionsGroupBox( self._displayOptionsGroupBox )


    def _loadGroupBox1(self, pmGroupBox):
        """
        load widgets in groupbox1
        """
        self.segmentListWidget = PM_SelectionListWidget(
            pmGroupBox,
            self.win,
            label = "",
            heightByRows = 12)

        self.segmentListWidget.setFocusPolicy(Qt.StrongFocus)
        self.segmentListWidget.setFocus()
        self.setFocusPolicy(Qt.StrongFocus)

        self.addSegmentsToolButton = PM_ToolButton(
                        pmGroupBox,
                        text = "Add segments to the list",
                        iconPath  = "ui/actions/Properties Manager"\
                        "/AddSegment_To_ResizeSegmentList.png",
                        spanWidth = True  )
        self.addSegmentsToolButton.setCheckable(True)
        self.addSegmentsToolButton.setAutoRaise(True)

        self.removeSegmentsToolButton = PM_ToolButton(
                        pmGroupBox,
                        text = "Remove segments from the list",
                        iconPath  = "ui/actions/Properties Manager"\
                        "/RemoveSegment_From_ResizeSegmentList.png",
                        spanWidth = True  )
        self.removeSegmentsToolButton.setCheckable(True)
        self.removeSegmentsToolButton.setAutoRaise(True)

        #Widgets to include in the widget row.
        widgetList = [
            ('QLabel', "  Add/Remove Segments:", 0),
            ('QSpacerItem', 5, 5, 1),
            ('PM_ToolButton', self.addSegmentsToolButton, 2),
             ('QSpacerItem', 5, 5, 3),
            ('PM_ToolButton', self.removeSegmentsToolButton, 4),
            ('QSpacerItem', 5, 5, 5) ]

        widgetRow = PM_WidgetRow(pmGroupBox,
                                 title     = '',
                                 widgetList = widgetList,
                                 label = "",
                                 spanWidth = True )


    def _addWhatsThisText(self):
        """
        Add what's this text.
        Abstract method.
        """
        pass

    def show(self):
        """
        Overrides the superclass method
        @see: self._deactivateAddRemoveSegmentsTool
        """
        _superclass.show(self)
        ##self.updateListWidgets()
        self._deactivateAddRemoveSegmentsTool()

    def _deactivateAddRemoveSegmentsTool(self):
        """
        Deactivate tools that allow adding or removing the segments to the
        segment list in the Property manager. This can be simply done by
        resetting the state of toolbuttons to False.
        Example: toolbuttons that add or remove
        segments to the segment list in the Property manager. When self.show
        is called these need to be unchecked.
        @see: self.isAddSegmentsToolActive()
        @see:self.isRemoveSegmentsToolActive()
        @see: self.show()
        """
        self.addSegmentsToolButton.setChecked(False)
        self.removeSegmentsToolButton.setChecked(False)


    def listWidgetHasFocus(self):
        """
        Checks if the list widget that lists dnasegments to be resized has the
        Qt focus. This is used to just remove items from the list widget
        (without actually 'deleting' the corresponding Dnasegment in the GLPane)
        @see: MultipleDnaSegment_GraphicsMode.keyPressEvent() where it is called
        """
        if self.segmentListWidget.hasFocus():
            return True
        return False


    def setParameters(self, params):
        pass

    def getParameters(self):
        return ()

    def updateListWidgets(self):
        self.updateSegmentListWidget()

    def updateSegmentListWidget(self):
        """
        Update the list of segments shown in the segments list widget
        @see: self.updateListWidgets, self.updateStrandListWidget
        """
        segmentList = []

        segmentList = self.command.getResizeSegmentList()

        self.segmentListWidget.insertItems(
            row = 0,
            items = segmentList)


    def _connect_showCursorTextCheckBox(self):
        """
        Connect the show cursor text checkbox with user prefs_key.
        Overrides
        DnaOrCnt_PropertyManager._connect_showCursorTextCheckBox
        """
        connect_checkbox_with_boolean_pref(
            self.showCursorTextCheckBox ,
            dnaSegmentEditCommand_showCursorTextCheckBox_prefs_key)


    def _params_for_creating_cursorTextCheckBoxes(self):
        """
        Returns params needed to create various cursor text checkboxes connected
        to prefs_keys  that allow custom cursor texts.
        @return: A list containing tuples in the following format:
                ('checkBoxTextString' , preference_key). PM_PrefsCheckBoxes
                uses this data to create checkboxes with the the given names and
                connects them to the provided preference keys. (Note that
                PM_PrefsCheckBoxes puts thes within a GroupBox)
        @rtype: list
        @see: PM_PrefsCheckBoxes
        @see: self._loadDisplayOptionsGroupBox where this list is used.
        @see: Superclass method which is overridden here --
        DnaOrCnt_PropertyManager._params_for_creating_cursorTextCheckBoxes()
        """
        params = \
               [  #Format: (" checkbox text", prefs_key)
                  ("Number of base pairs",
                   dnaSegmentEditCommand_cursorTextCheckBox_numberOfBasePairs_prefs_key),

                   ("Duplex length",
                    dnaSegmentEditCommand_cursorTextCheckBox_length_prefs_key),

                    ("Number of basepairs to be changed",
                     dnaSegmentEditCommand_cursorTextCheckBox_changedBasePairs_prefs_key)
                 ]

        return params