| 51 | |
| 52 | '''Proposing More classes''' |
| 53 | {{{ |
| 54 | #!python |
| 55 | |
| 56 | class WxGUI: |
| 57 | RASTER = 'raster' |
| 58 | VECTOR = 'vector' |
| 59 | |
| 60 | class Layer(object): |
| 61 | |
| 62 | self.ltype = None |
| 63 | self.lname = None |
| 64 | self.style = None |
| 65 | |
| 66 | def __init__(): |
| 67 | ""TBD"" |
| 68 | |
| 69 | def setName(self,n): |
| 70 | self.lname = n |
| 71 | |
| 72 | def setType(self,t): |
| 73 | self.ltype = t |
| 74 | |
| 75 | def getName(self): |
| 76 | return lname |
| 77 | |
| 78 | def getType(self): |
| 79 | return ltype |
| 80 | |
| 81 | def setStyle(style): |
| 82 | """ |
| 83 | (A virtual function) |
| 84 | style object must be a new class which holds the style info such as color map for vector/raster" |
| 85 | """ |
| 86 | def getStyle(): |
| 87 | return lstyle |
| 88 | |
| 89 | class RasterStyle; #Functionality: TBD |
| 90 | class VectorStyle; #Functionality: TBD |
| 91 | |
| 92 | class RasterLayer(Layer): |
| 93 | |
| 94 | def getType(self): |
| 95 | return wxGUI.RASTER |
| 96 | |
| 97 | def getStyle(self): |
| 98 | return stlye #instance of RasterStyle |
| 99 | |
| 100 | class VectorLayer(Layer): |
| 101 | |
| 102 | def getType(self): |
| 103 | return wxGUI.VECTOR |
| 104 | |
| 105 | def getStyle(self): |
| 106 | return stlye #instance of VectorStyle |
| 107 | |
| 108 | |
| 109 | class LayerManager(object): |
| 110 | |
| 111 | def addLayer(sef,layer, type): |
| 112 | """ |
| 113 | Is specifying type is mandatory? We already have access to type = layer.ltype |
| 114 | I mentioned here to demonstrate the idea to enum instead of hardcorded string for layer type |
| 115 | """ |
| 116 | |
| 117 | def addRaster(self,layer): |
| 118 | """ |
| 119 | suggest a namespace name instead of wxGUI |
| 120 | """ |
| 121 | addLayer(layer, wxGUI.RASTER) #no more hardcorded string ex: addLayer(layer,'raster') |
| 122 | |
| 123 | def addVector(self,layer): |
| 124 | addLayer(layer, wxGUI.VECTOR) |
| 125 | |
| 126 | def addOther(self,layer): |
| 127 | """TBD""" |
| 128 | |
| 129 | |
| 130 | class LayerManagerFrame(wx.Frame, layerManager): |
| 131 | |
| 132 | def __init__(parent, id, title,size,pos): |
| 133 | wx.Frame.__init__(parent,id,title,size,pos) |
| 134 | self.lmgrObject = LayerManager(self) #creates non-gui layer manager |
| 135 | |
| 136 | def getLayerManager(self): |
| 137 | return self.lmgrObject |
| 138 | |
| 139 | |
| 140 | def addRasterLayer(self,layer): |
| 141 | self.lmgrObject.addRasterLayer(layer) |
| 142 | """ltreeitem can be created using a GUI class""" |
| 143 | ltreeitem.text = layer.getName() |
| 144 | ltreeitem.checked = True |
| 145 | self.ltree.Append(ltreeitem) |
| 146 | |
| 147 | class GMFrame(wx.Frame): |
| 148 | def __init__(self,id,title,size,pos): |
| 149 | wx.Frame.__init__(id,title,size,pos) |
| 150 | |
| 151 | def SetLayerManager(self,lmgr): |
| 152 | if type(lmgr) == wx.Frame: |
| 153 | self.lmgrFrame = lmgr |
| 154 | self.lmgrAsFrame = True |
| 155 | |
| 156 | if type(lmgr) == wx.Panel: |
| 157 | self.lmgrFrame = lmgr |
| 158 | self.lmgrAsFrame = False |
| 159 | |
| 160 | def LmgrAsFrame(self): |
| 161 | return self.lmgrAsFrame |
| 162 | }}} |
| 163 | |
| 164 | '''Simple usage of the above Pseudo code''' |
| 165 | |
| 166 | {{{ |
| 167 | #!python |
| 168 | frame = new GFrame() #gui object |
| 169 | lmgr = LayerManagerFrame() #gui object panel/Frame |
| 170 | frame.SetLayerManager(lmgr) |
| 171 | rlayer = new RasterLayer() #non-gui object |
| 172 | lmgr.addRasterLayer(rlayer) |
| 173 | vlayer = new VectorLayer() #non-gui object |
| 174 | vlayer.setEditable(True) |
| 175 | lmgr.addVectorLayer(vlayer) |
| 176 | }}} |
| 177 | |
| 178 | ''TBD: To Be Decided'' |