wxWidgets/wxPython/wx/lib/rcsizer.py

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


# 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.PySizer):

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

    def __init__(self):
        wx.PySizer.__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

        wx.PySizer.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"

        wx.PySizer.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)


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