#----------------------------------------------------------------------
# Name:        wx.lib.rcsizer
# Purpose:     RowColSizer:
#
# Author:      Robin Dunn, adapted from code by Niki Spahiev
#
# Created:     26-Feb-2002
# Copyright:   (c) 2002-2020 by Total Control Software
# Licence:     wxWindows license
#----------------------------------------------------------------------
# 12/10/2003 - Jeff Grimmett (grimmtooth@softhome.net)
#
# o 2.5 compatibility update.
# o There appears to be a prob with the wx.Sizer.GetSize() method.
#
# 12/23/2003 - Jeff Grimmett (grimmtooth@softhome.net)
#
# o wx.Sizer.GetSize() method working right now.
#

"""
A pure-Python Sizer that lays out items in a grid similar to
wx.FlexGridSizer but item position is not implicit but explicitly
specified by row and col, and row/col spanning is supported.

Adapted from code by Niki Spahiev.

NOTE: There is now a C++ version of this class that has been wrapped
as wx.GridBagSizer.  It is quicker and more capable so you are
encouraged to switch.
"""

import  operator
import  wx

from functools import reduce as reduce

# After the lib and demo no longer uses this sizer enable this warning...

## import  warnings
## warningmsg = r"""\

## #####################################################\
## # THIS MODULE IS NOW DEPRECATED                      |
## #                                                    |
## # The core wx library now contains a similar class   |
## # wrapped as wx.GridBagSizer.                        |
## #####################################################/

## """

## warnings.warn(warningmsg, DeprecationWarning, stacklevel=2)

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

class RowColSizer(wx.Sizer):

    # default sizes for cells with no item
    col_w = 10
    row_h = 22

    def __init__(self):
        wx.Sizer.__init__(self)
        self.growableRows = []
        self.growableCols = []


    def AddGrowableRow(self, idx):
        self.growableRows.append(idx)

    def AddGrowableCol(self, idx):
        self.growableCols.append(idx)


    #--------------------------------------------------
    def Add(self, item, option=0, flag=0, border=0,
            # row, col and spanning can be specified individually...
            row=-1, col=-1,
            rowspan=1, colspan=1,
            # or as tuples (row,col) and (rowspan,colspan)
            pos=None, size=None,
            ):

        if pos is not None:
            row, col = pos
        if size is not None:
            rowspan, colspan = size

        assert row != -1, "Row must be specified"
        assert col != -1, "Column must be specified"

        # Do I really want to do this?  Probably not...
        #if rowspan > 1 or colspan > 1:
        #    flag = flag | wx.EXPAND

        return wx.Sizer.Add(self, item, option, flag, border,
                              userData=(row, col, row+rowspan, col+colspan))

    #AddWindow = Add
    #AddSizer  = Add

    def AddSpacer(self, width, height, option=0, flag=0, border=0,
                  row=-1, col=-1,
                  rowspan=1, colspan=1,
                  pos=None, size=None,
                  ):
        if pos is not None:
            row, col = pos
        if size is not None:
            rowspan, colspan = size

        assert row != -1, "Row must be specified"
        assert col != -1, "Column must be specified"

        return wx.Sizer.Add(self, (width, height), option, flag, border,
                              userData=(row, col, row+rowspan, col+colspan))

    #--------------------------------------------------
    def _add( self, size, dim ):
        r, c, r2, c2 = dim   # unpack coords and spanning

        # are the widths and heights lists long enough?
        if r2 > len(self.rowHeights):
            x = [self.row_h] * (r2-len(self.rowHeights))
            self.rowHeights.extend( x )
        if c2 > len(self.colWidths):
            x = [self.col_w] * (c2-len(self.colWidths))
            self.colWidths.extend( x )

        # set the widths and heights lists for this item
        scale = (r2 - r)
        for i in range(r, r2):
            self.rowHeights[i] = max( self.rowHeights[i], size.height / scale )
        scale = (c2 - c)
        for i in range(c, c2):
            self.colWidths[i] = max( self.colWidths[i], size.width / scale )


    #--------------------------------------------------
    def CalcMin( self ):
        self.rowHeights = []
        self.colWidths = []

        items = self.GetChildren()
        if not items:
            return wx.Size(10, 10)

        for item in items:
            self._add( item.CalcMin(), item.GetUserData() )

        size = wx.Size( reduce( operator.add, self.colWidths),
                        reduce( operator.add, self.rowHeights) )
        return size


    #--------------------------------------------------
    def RecalcSizes( self ):
        # save current dimensions, etc.
        curWidth, curHeight  = self.GetSize()
        px, py = self.GetPosition()
        minWidth, minHeight  = self.CalcMin()

        # Check for growables
        if self.growableRows and curHeight > minHeight:
            delta = (curHeight - minHeight) / len(self.growableRows)
            extra = (curHeight - minHeight) % len(self.growableRows)
            for idx in self.growableRows:
                self.rowHeights[idx] += delta
            self.rowHeights[self.growableRows[0]] += extra

        if self.growableCols and curWidth > minWidth:
            delta = (curWidth - minWidth) / len(self.growableCols)
            extra = (curWidth - minWidth) % len(self.growableCols)
            for idx in self.growableCols:
                self.colWidths[idx] += delta
            self.colWidths[self.growableCols[0]] += extra

        rpos = [0] * len(self.rowHeights)
        cpos = [0] * len(self.colWidths)

        for i in range(len(self.rowHeights)):
            height = self.rowHeights[i]
            rpos[i] = py
            py += height

        for i in range(len(self.colWidths)):
            width = self.colWidths[i]
            cpos[i] = px
            px += width

        # iterate children and set dimensions...
        for item in self.GetChildren():
            r, c, r2, c2 = item.GetUserData()
            width = reduce( operator.add, self.colWidths[c:c2] )
            height = reduce( operator.add, self.rowHeights[r:r2] )
            self.SetItemBounds( item, cpos[c], rpos[r], width, height )


    #--------------------------------------------------
    def SetItemBounds(self, item, x, y, w, h):
        # calculate the item's actual size and position within
        # its grid cell
        ipt = wx.Point(x, y)
        isz = item.CalcMin()
        flag = item.GetFlag()

        if flag & wx.EXPAND or flag & wx.SHAPED:
            isz = wx.Size(w, h)
        else:
            if flag & wx.ALIGN_CENTER_HORIZONTAL:
                ipt.x = x + (w - isz.width) / 2
            elif flag & wx.ALIGN_RIGHT:
                ipt.x = x + (w - isz.width)

            if flag & wx.ALIGN_CENTER_VERTICAL:
                ipt.y = y + (h - isz.height) / 2
            elif flag & wx.ALIGN_BOTTOM:
                ipt.y = y + (h - isz.height)

        item.SetDimension(ipt, isz)


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



