projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 6147ee34 RD |
1 | #---------------------------------------------------------------------- |
| 2 | # Name: wxPython.lib.sizers.shape | |
| 3 | # Purpose: A Sizer that preserves the shape (proportions) | |
| 4 | # of the managed window | |
| 5 | # | |
| 6 | # Created: 7-October-1999 | |
| 7 | # RCS-ID: $Id$ | |
| 8 | # Copyright: SIA "ANK" | |
| 9 | # Licence: wxWindows license | |
| 10 | #---------------------------------------------------------------------- | |
| 11 | ||
| 12 | from sizer import wxSizer | |
| 13 | ||
| 14 | wxANCHOR_NONE = 0 | |
| 15 | wxANCHOR_NORTH = 1 | |
| 16 | wxANCHOR_SOUTH = 2 | |
| 17 | wxANCHOR_EAST = 4 | |
| 18 | wxANCHOR_WEST = 8 | |
| 19 | wxANCHOR_NW = wxANCHOR_NORTH | wxANCHOR_WEST | |
| 20 | wxANCHOR_NE = wxANCHOR_NORTH | wxANCHOR_EAST | |
| 21 | wxANCHOR_SW = wxANCHOR_SOUTH | wxANCHOR_WEST | |
| 22 | wxANCHOR_SE = wxANCHOR_SOUTH | wxANCHOR_EAST | |
| 23 | ||
| 24 | #---------------------------------------------------------------------- | |
| 25 | ||
| 26 | class wxShapeSizer(wxSizer): | |
| 27 | """ | |
| 28 | wxShapeSizer | |
| 29 | ||
| 30 | This sizer preserves the proportional dimensions of the managed | |
| 31 | window, leaving empty space either in horizontal or vertical | |
| 32 | dimension. | |
| 33 | ||
| 34 | By default, the managed window is centered within allowed size. | |
| 35 | You may specify an anchor parameter to leave all of the extra | |
| 36 | space on one side: wxANCHOR_NORTH and wxANCHOR_SOUTH manage | |
| 37 | vertical dimension, leaving extra space on the bottom or top side, | |
| 38 | respectively; wxANCHOR_EAST and wxANCHOR_WEST do the same in | |
| 39 | horizontal dimension. wxANCHOR_NW, wxANCHOR_NE, wxANCHOR_SW | |
| 40 | and wxANCHOR_SE are short-cut names for combinations north+west, | |
| 41 | north+east, south+west, south+east. | |
| 42 | ||
| 43 | If both anchors are specified in either direction, south and east | |
| 44 | take precedence over north and west, respectively. (Because of | |
| 45 | gravity, widgets tend to fall down.) | |
| 46 | """ | |
| 47 | def __init__(self, anchor =wxANCHOR_NONE): | |
| 48 | wxSizer.__init__(self) | |
| 49 | self.anchor =anchor | |
| 50 | ||
| 51 | def Add(self, widget): | |
| 52 | if self.children: | |
| 53 | raise ValueError("wxShapeSizer can only contain one child.") | |
| 54 | ||
| 55 | wxSizer.Add(self, widget) | |
| 56 | ||
| 57 | def CalcMin(self): | |
| 58 | isSizer, widget, width, height, borderSize = self.children[0] | |
| 59 | ||
| 60 | if isSizer: | |
| 61 | width, height = widget.CalcMin() | |
| 62 | ||
| 63 | return width, height | |
| 64 | ||
| 65 | def RecalcSizes(self): | |
| 66 | isSizer, widget, width, height, borderSize = self.children[0] | |
| 67 | width =self.size.width | |
| 68 | height =self.size.height | |
| 69 | px =self.origin.x | |
| 70 | py =self.origin.y | |
| 71 | anchor =self.anchor | |
| 72 | # get current dimensions of the managed window | |
| 73 | w, h =self.CalcMin() | |
| 74 | ratio =float(w) /h | |
| 75 | # in what direction space should be added: | |
| 76 | # -1: horisontal | |
| 77 | # 1: vertical | |
| 78 | # 0: shape is ok | |
| 79 | dir =cmp(ratio /width *height, 1) | |
| 80 | if dir <0: | |
| 81 | # recalculate width | |
| 82 | old_width =width | |
| 83 | width =height *ratio | |
| 84 | if anchor & wxANCHOR_EAST: | |
| 85 | px =px +old_width -width | |
| 86 | elif not (anchor & wxANCHOR_WEST): | |
| 87 | px =px +(old_width -width) /2 | |
| 88 | elif dir >0: | |
| 89 | # recalculate height | |
| 90 | old_height =height | |
| 91 | height =width /ratio | |
| 92 | if anchor & wxANCHOR_SOUTH: | |
| 93 | py =py +old_height -height | |
| 94 | elif not (anchor & wxANCHOR_NORTH): | |
| 95 | py =py +(old_height -height) /2 | |
| 96 | ||
| 97 | widget.SetDimensions(px, py, width, height) |