projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 2f90df85 RD |
1 | #---------------------------------------------------------------------- |
| 2 | # Name: wxPython.lib.GridSizer | |
| 3 | # Purpose: An example sizer derived from the C++ wxPySizer that | |
| 4 | # sizes items in a fixed or flexible grid. | |
| 5 | # | |
| 6 | # Author: Robin Dunn | |
| 7 | # | |
| 8 | # Created: 21-Sept-1999 | |
| 9 | # RCS-ID: $Id$ | |
| 10 | # Copyright: (c) 1999 by Total Control Software | |
| 11 | # Licence: wxWindows license | |
| 12 | #---------------------------------------------------------------------- | |
| 13 | ||
| 14 | """ | |
| 15 | ||
| 16 | In this module you will find wxGridSizer and wxFlexgridSizer. | |
| 17 | wxGridSizer arrainges its items in a grid in which all the widths and | |
| 18 | heights are the same. wxFlexgridSizer allows different widths and | |
| 19 | heights, and you can also specify rows and/or columns that are | |
| 20 | growable. See the demo for a couple examples for how to use them. | |
| 21 | ||
| 22 | """ | |
| 23 | ||
| 24 | ||
| 25 | from wxPython.wx import * | |
| 26 | ||
| 27 | import operator | |
| 28 | ||
| 29 | #---------------------------------------------------------------------- | |
| 30 | ||
| 31 | class wxGridSizer(wxPySizer): | |
| 32 | def __init__(self, rows=0, cols=0, hgap=0, vgap=0): | |
| 33 | wxPySizer.__init__(self) | |
| 34 | if rows == 0 and cols == 0: | |
| 35 | raise ValueError, "rows and cols cannot both be zero" | |
| 36 | ||
| 37 | self.rows = rows | |
| 38 | self.cols = cols | |
| 39 | self.hgap = hgap | |
| 40 | self.vgap = vgap | |
| 41 | ||
| 42 | ||
| 43 | def SetRows(self, rows): | |
| 44 | if rows == 0 and self.cols == 0: | |
| 45 | raise ValueError, "rows and cols cannot both be zero" | |
| 46 | self.rows = rows | |
| 47 | ||
| 48 | def SetColumns(self, cols): | |
| 49 | if self.rows == 0 and cols == 0: | |
| 50 | raise ValueError, "rows and cols cannot both be zero" | |
| 51 | self.cols = cols | |
| 52 | ||
| 53 | def GetRows(self): | |
| 54 | return self.rows | |
| 55 | ||
| 56 | def GetColumns(self): | |
| 57 | return self.cols | |
| 58 | ||
| 59 | def SetHgap(self, hgap): | |
| 60 | self.hgap = hgap | |
| 61 | ||
| 62 | def SetVgap(self, vgap): | |
| 63 | self.vgap = vgap | |
| 64 | ||
| 65 | def GetHgap(self, hgap): | |
| 66 | return self.hgap | |
| 67 | ||
| 68 | def GetVgap(self, vgap): | |
| 69 | return self.vgap | |
| 70 | ||
| 71 | #-------------------------------------------------- | |
| 72 | def CalcMin(self): | |
| 73 | items = self.GetChildren() | |
| 74 | nitems = len(items) | |
| 75 | nrows = self.rows | |
| 76 | ncols = self.cols | |
| 77 | ||
| 78 | if ncols > 0: | |
| 79 | nrows = (nitems + ncols-1) / ncols | |
| 80 | else: | |
| 81 | ncols = (nitems + nrows-1) / nrows | |
| 82 | ||
| 83 | # Find the max width and height for any component. | |
| 84 | w = 0 | |
| 85 | h = 0 | |
| 86 | for item in items: | |
| 87 | size = item.CalcMin() | |
| 88 | w = max(w, size.width) | |
| 89 | h = max(h, size.height) | |
| 90 | ||
| 91 | return wxSize(ncols * w + (ncols-1) * self.hgap, | |
| 92 | nrows * h + (nrows-1) * self.vgap) | |
| 93 | ||
| 94 | ||
| 95 | #-------------------------------------------------- | |
| 96 | def RecalcSizes(self): | |
| 97 | items = self.GetChildren() | |
| 98 | if not items: | |
| 99 | return | |
| 100 | ||
| 101 | nitems = len(items) | |
| 102 | nrows = self.rows | |
| 103 | ncols = self.cols | |
| 104 | ||
| 105 | if ncols > 0: | |
| 106 | nrows = (nitems + ncols-1) / ncols | |
| 107 | else: | |
| 108 | ncols = (nitems + nrows-1) / nrows | |
| 109 | ||
| 110 | ||
| 111 | sz = self.GetSize() | |
| 112 | pt = self.GetPosition() | |
| 113 | w = (sz.width - (ncols - 1) * self.hgap) / ncols; | |
| 114 | h = (sz.height - (nrows - 1) * self.vgap) / nrows; | |
| 115 | ||
| 116 | x = pt.x | |
| 117 | for c in range(ncols): | |
| 118 | y = pt.y | |
| 119 | for r in range(nrows): | |
| 120 | i = r * ncols + c | |
| 121 | if i < nitems: | |
| 122 | self.SetItemBounds(items[i], x, y, w, h) | |
| 123 | y = y + h + self.vgap | |
| 124 | x = x + w + self.hgap | |
| 125 | ||
| 126 | ||
| 127 | #-------------------------------------------------- | |
| 128 | def SetItemBounds(self, item, x, y, w, h): | |
| 129 | # calculate the item's size and position within | |
| 130 | # its grid cell | |
| 131 | ipt = wxPoint(x, y) | |
| 132 | isz = item.CalcMin() | |
| 133 | flag = item.GetFlag() | |
| 134 | ||
| 135 | if flag & wxEXPAND: | |
| 136 | isz = wxSize(w, h) | |
| 137 | ||
| 138 | elif flag & wxCENTER: | |
| 139 | ipt.x = x + (w - isz.width) / 2 | |
| 140 | ipt.y = y + (h - isz.height) / 2 | |
| 141 | ||
| 142 | if flag & wxALIGN_LEFT: | |
| 143 | ipt.x = x | |
| 144 | elif flag & wxALIGN_RIGHT: | |
| 145 | ipt.x = x + (w - isz.width) | |
| 146 | ||
| 147 | if flag & wxALIGN_TOP: | |
| 148 | ipt.y = y | |
| 149 | elif flag & wxALIGN_BOTTOM: | |
| 150 | ipt.y = y + (h - isz.height) | |
| 151 | ||
| 152 | item.SetDimension(ipt, isz) | |
| 153 | ||
| 154 | ||
| 155 | #---------------------------------------------------------------------- | |
| 156 | ||
| 157 | ||
| 158 | ||
| 159 | class wxFlexGridSizer(wxGridSizer): | |
| 160 | def __init__(self, rows=0, cols=0, hgap=0, vgap=0): | |
| 161 | wxGridSizer.__init__(self, rows, cols, hgap, vgap) | |
| 162 | self.rowHeights = [] | |
| 163 | self.colWidths = [] | |
| 164 | self.growableRows = [] | |
| 165 | self.growableCols = [] | |
| 166 | ||
| 167 | def AddGrowableRow(self, idx): | |
| 168 | self.growableRows.append(idx) | |
| 169 | ||
| 170 | def AddGrowableCol(self, idx): | |
| 171 | self.growableCols.append(idx) | |
| 172 | ||
| 173 | #-------------------------------------------------- | |
| 174 | def CalcMin(self): | |
| 175 | items = self.GetChildren() | |
| 176 | nitems = len(items) | |
| 177 | nrows = self.rows | |
| 178 | ncols = self.cols | |
| 179 | ||
| 180 | if ncols > 0: | |
| 181 | nrows = (nitems + ncols-1) / ncols | |
| 182 | else: | |
| 183 | ncols = (nitems + nrows-1) / nrows | |
| 184 | ||
| 185 | # Find the max width and height for any component. | |
| 186 | self.rowHeights = [0] * nrows | |
| 187 | self.colWidths = [0] * ncols | |
| 188 | for i in range(len(items)): | |
| 189 | size = items[i].CalcMin() | |
| 190 | row = i / ncols | |
| 191 | col = i % ncols | |
| 192 | self.rowHeights[row] = max(size.height, self.rowHeights[row]) | |
| 193 | self.colWidths[col] = max(size.width, self.colWidths[col]) | |
| 194 | ||
| 195 | # Add up all the widths and heights | |
| 196 | cellsWidth = reduce(operator.__add__, self.colWidths) | |
| 197 | cellHeight = reduce(operator.__add__, self.rowHeights) | |
| 198 | ||
| 199 | return wxSize(cellsWidth + (ncols-1) * self.hgap, | |
| 200 | cellHeight + (nrows-1) * self.vgap) | |
| 201 | ||
| 202 | ||
| 203 | #-------------------------------------------------- | |
| 204 | def RecalcSizes(self): | |
| 205 | items = self.GetChildren() | |
| 206 | if not items: | |
| 207 | return | |
| 208 | ||
| 209 | nitems = len(items) | |
| 210 | nrows = self.rows | |
| 211 | ncols = self.cols | |
| 212 | ||
| 213 | if ncols > 0: | |
| 214 | nrows = (nitems + ncols-1) / ncols | |
| 215 | else: | |
| 216 | ncols = (nitems + nrows-1) / nrows | |
| 217 | ||
| 218 | minsz = self.CalcMin() | |
| 219 | sz = self.GetSize() | |
| 220 | pt = self.GetPosition() | |
| 221 | ||
| 222 | # Check for growables | |
| 223 | if self.growableRows and sz.height > minsz.height: | |
| 224 | delta = (sz.height - minsz.height) / len(self.growableRows) | |
| 225 | for idx in self.growableRows: | |
| 226 | self.rowHeights[idx] = self.rowHeights[idx] + delta | |
| 227 | ||
| 228 | if self.growableCols and sz.width > minsz.width: | |
| 229 | delta = (sz.width - minsz.width) / len(self.growableCols) | |
| 230 | for idx in self.growableCols: | |
| 231 | self.colWidths[idx] = self.colWidths[idx] + delta | |
| 232 | ||
| 233 | # Layout each cell | |
| 234 | x = pt.x | |
| 235 | for c in range(ncols): | |
| 236 | y = pt.y | |
| 237 | for r in range(nrows): | |
| 238 | i = r * ncols + c | |
| 239 | if i < nitems: | |
| 240 | w = max(0, min(self.colWidths[c], sz.width - x)) | |
| 241 | h = max(0, min(self.rowHeights[r], sz.height - y)) | |
| 242 | self.SetItemBounds(items[i], x, y, w, h) | |
| 243 | y = y + self.rowHeights[r] + self.vgap | |
| 244 | x = x + self.colWidths[c] + self.hgap | |
| 245 | ||
| 246 | #---------------------------------------------------------------------- | |
| 247 | ||
| 248 | ||
| 249 | ||
| 250 | ||
| 251 | ||
| 252 |