96de41c2c5
based on code from Niki Spahiev and lets you specify a row and column for each item, as well as optional column or row spanning. Cells with not item assigned to it are just left blank. Stretchable rows or columns are specified and work the same as in wxFlexGridSizer. A few other minor changes too. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14431 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
268 lines
8.1 KiB
Python
268 lines
8.1 KiB
Python
#----------------------------------------------------------------------
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# Name: wxPython.lib.grids
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# Purpose: An example sizer derived from the C++ wxPySizer that
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# sizes items in a fixed or flexible grid.
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#
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# Author: Robin Dunn
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#
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# Created: 21-Sept-1999
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# RCS-ID: $Id$
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# Copyright: (c) 1999 by Total Control Software
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# Licence: wxWindows license
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#----------------------------------------------------------------------
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"""
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In this module you will find wxGridSizer and wxFlexGridSizer. Please
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note that these sizers have since been ported to C++ and those
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versions are now exposed in the regular wxPython wrappers. However I
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am also leaving them here in the library so they can serve as an
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example of how to implement sizers in Python.
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wxGridSizer: Sizes and positions items such that all rows are the same
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height and all columns are the same width. You can specify a gap in
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pixels to be used between the rows and/or the columns. When you
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create the sizer you specify the number of rows or the number of
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columns and then as you add items it figures out the other dimension
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automatically. Like other sizers, items can be set to fill their
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available space, or to be aligned on a side, in a corner, or in the
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center of the space. When the sizer is resized, all the items are
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resized the same amount so all rows and all columns remain the same
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size.
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wxFlexGridSizer: Derives from wxGridSizer and adds the ability for
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particular rows and/or columns to be marked as growable. This means
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that when the sizer changes size, the growable rows and colums are the
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ones that stretch. The others remain at their initial size.
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See the demo for a couple examples for how to use them.
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"""
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from wxPython.wx import *
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import operator
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#----------------------------------------------------------------------
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class wxGridSizer(wxPySizer):
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def __init__(self, rows=0, cols=0, hgap=0, vgap=0):
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wxPySizer.__init__(self)
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if rows == 0 and cols == 0:
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raise ValueError, "rows and cols cannot both be zero"
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self.rows = rows
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self.cols = cols
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self.hgap = hgap
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self.vgap = vgap
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def SetRows(self, rows):
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if rows == 0 and self.cols == 0:
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raise ValueError, "rows and cols cannot both be zero"
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self.rows = rows
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def SetColumns(self, cols):
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if self.rows == 0 and cols == 0:
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raise ValueError, "rows and cols cannot both be zero"
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self.cols = cols
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def GetRows(self):
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return self.rows
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def GetColumns(self):
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return self.cols
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def SetHgap(self, hgap):
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self.hgap = hgap
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def SetVgap(self, vgap):
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self.vgap = vgap
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def GetHgap(self, hgap):
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return self.hgap
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def GetVgap(self, vgap):
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return self.vgap
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#--------------------------------------------------
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def CalcMin(self):
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items = self.GetChildren()
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nitems = len(items)
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nrows = self.rows
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ncols = self.cols
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if ncols > 0:
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nrows = (nitems + ncols-1) / ncols
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else:
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ncols = (nitems + nrows-1) / nrows
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# Find the max width and height for any component.
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w = 0
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h = 0
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for item in items:
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size = item.CalcMin()
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w = max(w, size.width)
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h = max(h, size.height)
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return wxSize(ncols * w + (ncols-1) * self.hgap,
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nrows * h + (nrows-1) * self.vgap)
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#--------------------------------------------------
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def RecalcSizes(self):
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items = self.GetChildren()
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if not items:
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return
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nitems = len(items)
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nrows = self.rows
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ncols = self.cols
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if ncols > 0:
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nrows = (nitems + ncols-1) / ncols
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else:
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ncols = (nitems + nrows-1) / nrows
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sz = self.GetSize()
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pt = self.GetPosition()
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w = (sz.width - (ncols - 1) * self.hgap) / ncols;
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h = (sz.height - (nrows - 1) * self.vgap) / nrows;
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x = pt.x
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for c in range(ncols):
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y = pt.y
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for r in range(nrows):
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i = r * ncols + c
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if i < nitems:
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self.SetItemBounds(items[i], x, y, w, h)
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y = y + h + self.vgap
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x = x + w + self.hgap
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#--------------------------------------------------
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def SetItemBounds(self, item, x, y, w, h):
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# calculate the item's size and position within
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# its grid cell
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ipt = wxPoint(x, y)
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isz = item.CalcMin()
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flag = item.GetFlag()
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if flag & wxEXPAND or flag & wxSHAPED:
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isz = wxSize(w, h)
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else:
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if flag & wxALIGN_CENTER_HORIZONTAL:
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ipt.x = x + (w - isz.width) / 2
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elif flag & wxALIGN_RIGHT:
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ipt.x = x + (w - isz.width)
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if flag & wxALIGN_CENTER_VERTICAL:
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ipt.y = y + (h - isz.height) / 2
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elif flag & wxALIGN_BOTTOM:
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ipt.y = y + (h - isz.height)
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item.SetDimension(ipt, isz)
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#----------------------------------------------------------------------
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class wxFlexGridSizer(wxGridSizer):
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def __init__(self, rows=0, cols=0, hgap=0, vgap=0):
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wxGridSizer.__init__(self, rows, cols, hgap, vgap)
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self.rowHeights = []
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self.colWidths = []
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self.growableRows = []
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self.growableCols = []
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def AddGrowableRow(self, idx):
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self.growableRows.append(idx)
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def AddGrowableCol(self, idx):
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self.growableCols.append(idx)
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#--------------------------------------------------
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def CalcMin(self):
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items = self.GetChildren()
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nitems = len(items)
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nrows = self.rows
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ncols = self.cols
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if ncols > 0:
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nrows = (nitems + ncols-1) / ncols
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else:
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ncols = (nitems + nrows-1) / nrows
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# Find the max width and height for any component.
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self.rowHeights = [0] * nrows
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self.colWidths = [0] * ncols
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for i in range(len(items)):
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size = items[i].CalcMin()
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row = i / ncols
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col = i % ncols
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self.rowHeights[row] = max(size.height, self.rowHeights[row])
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self.colWidths[col] = max(size.width, self.colWidths[col])
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# Add up all the widths and heights
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cellsWidth = reduce(operator.__add__, self.colWidths)
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cellHeight = reduce(operator.__add__, self.rowHeights)
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return wxSize(cellsWidth + (ncols-1) * self.hgap,
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cellHeight + (nrows-1) * self.vgap)
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#--------------------------------------------------
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def RecalcSizes(self):
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items = self.GetChildren()
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if not items:
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return
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nitems = len(items)
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nrows = self.rows
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ncols = self.cols
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if ncols > 0:
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nrows = (nitems + ncols-1) / ncols
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else:
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ncols = (nitems + nrows-1) / nrows
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minsz = self.CalcMin()
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sz = self.GetSize()
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pt = self.GetPosition()
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# Check for growables
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if self.growableRows and sz.height > minsz.height:
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delta = (sz.height - minsz.height) / len(self.growableRows)
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for idx in self.growableRows:
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self.rowHeights[idx] = self.rowHeights[idx] + delta
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if self.growableCols and sz.width > minsz.width:
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delta = (sz.width - minsz.width) / len(self.growableCols)
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for idx in self.growableCols:
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self.colWidths[idx] = self.colWidths[idx] + delta
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# bottom right corner
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sz = wxSize(pt.x + sz.width, pt.y + sz.height)
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# Layout each cell
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x = pt.x
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for c in range(ncols):
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y = pt.y
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for r in range(nrows):
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i = r * ncols + c
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if i < nitems:
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w = max(0, min(self.colWidths[c], sz.width - x))
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h = max(0, min(self.rowHeights[r], sz.height - y))
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self.SetItemBounds(items[i], x, y, w, h)
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y = y + self.rowHeights[r] + self.vgap
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x = x + self.colWidths[c] + self.hgap
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#----------------------------------------------------------------------
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