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from DebugVariableViewer import DebugVariableViewer

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#-------------------------------------------------------------------------------

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#                     Debug Variable Text Viewer Drop Target

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#-------------------------------------------------------------------------------

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"""

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Class that implements a custom drop target class for Debug Variable Text Viewer

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"""

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class DebugVariableTextDropTarget(wx.TextDropTarget):

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    def __init__(self, parent, window):

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        """

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        Constructor

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        @param parent: Reference to Debug Variable Text Viewer

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        @param window: Reference to the Debug Variable Panel

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        """

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        self.ParentControl = parent

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        self.ParentWindow = window

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        """

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        Destructor

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        """

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        # Remove reference to Debug Variable Text Viewer and Debug Variable

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        # Panel

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        self.ParentControl = None

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        """

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        Function called when mouse is dragged over Drop Target

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        @param x: X coordinate of mouse pointer

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        @param y: Y coordinate of mouse pointer

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        @param d: Suggested default for return value

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        """

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        # Signal parent that mouse is dragged over

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        self.ParentControl.OnMouseDragging(x, y)

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        """

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        Function called when mouse is dragged over Drop Target

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        @param x: X coordinate of mouse pointer

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        @param y: Y coordinate of mouse pointer

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        @param data: Text associated to drag'n drop

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        """

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        # Check that data is valid regarding DebugVariablePanel

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            if not isinstance(values, TupleType):

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                raise

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            message = _("Invalid value \"%s\" for debug variable") % data

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        # Display message if data is invalid

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        # Data contain a reference to a variable to debug

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        elif values[1] == "debug":

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            # Get Before which Viewer the variable has to be moved or added

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            # according to the position of mouse in Viewer.

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            width, height = self.ParentControl.GetSize()

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            target_idx = self.ParentControl.GetIndex()

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            if y > height / 2:

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                target_idx += 1

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            # Drag'n Drop is an internal is an internal move inside Debug

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            # Variable Panel 

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            if len(values) > 2 and values[2] == "move":

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                self.ParentWindow.MoveValue(values[0], 

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                                            target_idx)

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            # Drag'n Drop was initiated by another control of Beremiz

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                self.ParentWindow.InsertValue(values[0], 

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                                              target_idx, 

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                                              force=True)

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        """

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        Function called when mouse is leave Drop Target

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        """

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        # Signal Debug Variable Panel to reset highlight

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        """

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        Show error message in Error Dialog

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        @param message: Error message to display

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        """

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        dialog = wx.MessageDialog(self.ParentWindow, 

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                                  message, 

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                                  _("Error"), 

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                                  wx.OK|wx.ICON_ERROR)

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#-------------------------------------------------------------------------------

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#                      Debug Variable Text Viewer Class

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#-------------------------------------------------------------------------------

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"""

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Class that implements a Viewer that display variable values as a text

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"""

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class DebugVariableTextViewer(DebugVariableViewer, wx.Panel):

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        """

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        Constructor

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        @param parent: Parent wx.Window of DebugVariableText

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        @param window: Reference to the Debug Variable Panel

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        @param items: List of DebugVariableItem displayed by Viewer

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        """

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        # Set panel background colour

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        # Define panel drop target

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        self.SetDropTarget(DebugVariableTextDropTarget(self, window))

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        # Bind events

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        # Define panel min size for parent sizer layout

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        # Add buttons to Viewer

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        # Hide buttons until mouse enter Viewer

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        """

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        Method that refresh the content displayed by Viewer

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        """

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        # Create buffered DC for drawing in panel

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        # Get Graphics Context for DC, for anti-aliased and transparent

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        # rendering

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        # Get first item

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        item = self.ItemsDict.values()[0]

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        # Get item variable path masked according Debug Variable Panel mask

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        item_path = item.GetVariable(

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                self.ParentWindow.GetVariableNameMask())

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        # Draw item variable path at Viewer left side

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        w, h = gc.GetTextExtent(item_path)

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        gc.DrawText(item_path, 20, (height - h) / 2)

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        # Update 'Release' button state and text color according to item forced

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        # flag value

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        item_forced = item.IsForced()

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        self.Buttons[1].Enable(item_forced)

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        self.RefreshButtonsPosition()

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        if item_forced:

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        # Draw item current value at right side of Viewer

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        item_value = item.GetValue()

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        # Draw other Viewer common elements

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        """

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        Function called when mouse left button is pressed

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        @param event: wx.MouseEvent

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        """

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        # Get first item

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        item = self.ItemsDict.values()[0]

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        # Calculate item path bounding box

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        item_path = item.GetVariable(

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                self.ParentWindow.GetVariableNameMask())

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        w, h = self.GetTextExtent(item_path)

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        # Test if mouse has been pressed in this bounding box. In that case

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        # start a move drag'n drop of item variable 

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        item_path_bbox = wx.Rect(20, (height - h) / 2, w, h)

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        if item_path_bbox.InsideXY(x, y):

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            data = wx.TextDataObject(str((item.GetVariable(), "debug", "move")))

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        # In other case handle event normally

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        """

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        Function called when mouse left button is released

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        @param event: wx.MouseEvent

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        """

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        # Execute callback on button under mouse pointer if it exists

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        wx.CallAfter(self.HandleButton, x, y)

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        """

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        Function called when redrawing Viewer content is needed

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        @param event: wx.PaintEvent

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        """