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# Copyright (c) 2001, 2002, 2003 by Intevation GmbH |
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# Authors: |
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# Jonathan Coles <[email protected]> |
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# Frank Koormann <[email protected]> |
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# |
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# This program is free software under the GPL (>=v2) |
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# Read the file COPYING coming with Thuban for details. |
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|
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__version__ = "$Revision$" |
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|
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from Thuban import _ |
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|
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import resource |
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|
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from wxPython.wx import * |
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|
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from Thuban.Model.layer import BaseLayer |
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from Thuban.Model.map import Map |
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from Thuban.Model.classification import ClassGroup |
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|
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from Thuban.Model.messages import \ |
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MAP_STACKING_CHANGED, MAP_LAYERS_ADDED, MAP_LAYERS_REMOVED, LAYER_CHANGED,\ |
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LAYER_VISIBILITY_CHANGED, TITLE_CHANGED |
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|
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from Thuban.UI.messages import SCALE_CHANGED |
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|
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from Thuban.UI.classifier import ClassDataPreviewer |
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from Thuban.UI.dock import DockPanel |
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from Thuban.UI.scalebar import ScaleBar |
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|
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from Thuban.Lib.connector import ConnectorError |
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|
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ID_LEGEND_TOP = 4001 |
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ID_LEGEND_RAISE = 4002 |
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ID_LEGEND_LOWER = 4003 |
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ID_LEGEND_BOTTOM = 4004 |
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ID_LEGEND_TREE = 4005 |
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ID_LEGEND_PROPS = 4006 |
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ID_LEGEND_SHOWLAYER = 4007 |
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ID_LEGEND_HIDELAYER = 4008 |
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|
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BMP_SIZE_W = 15 |
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BMP_SIZE_H = 15 |
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|
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TOP_BMP = "top_layer" |
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RAISE_BMP = "raise_layer" |
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LOWER_BMP = "lower_layer" |
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BOTTOM_BMP = "bottom_layer" |
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SHOW_BMP = "show_layer" |
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HIDE_BMP = "hide_layer" |
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PROPS_BMP = "layer_properties" |
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|
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|
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class LegendPanel(DockPanel): |
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|
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def __init__(self, parent, map, mainWindow): |
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DockPanel.__init__(self, parent, -1) |
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|
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self.mainWindow = mainWindow |
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self.parent = parent |
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|
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self.buttons = [] |
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|
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panelBox = wxBoxSizer(wxVERTICAL) |
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|
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self.toolBar = wxToolBar(self, -1) |
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self.toolBar.SetToolBitmapSize(wxSize(24, 24)) |
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|
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bmp = resource.GetBitmapResource(TOP_BMP, wxBITMAP_TYPE_XPM) |
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self.toolBar.AddTool(ID_LEGEND_TOP, bmp, |
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shortHelpString=_("Top Layer")) |
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|
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bmp = resource.GetBitmapResource(RAISE_BMP, wxBITMAP_TYPE_XPM) |
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self.toolBar.AddTool(ID_LEGEND_RAISE, bmp, |
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shortHelpString=_("Raise Layer")) |
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|
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bmp = resource.GetBitmapResource(LOWER_BMP, wxBITMAP_TYPE_XPM) |
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self.toolBar.AddTool(ID_LEGEND_LOWER, bmp, |
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shortHelpString=_("Lower Layer")) |
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|
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bmp = resource.GetBitmapResource(BOTTOM_BMP, wxBITMAP_TYPE_XPM) |
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self.toolBar.AddTool(ID_LEGEND_BOTTOM, bmp, |
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shortHelpString=_("Bottom Layer")) |
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|
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bmp = resource.GetBitmapResource(SHOW_BMP, wxBITMAP_TYPE_XPM) |
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self.toolBar.AddTool(ID_LEGEND_SHOWLAYER, bmp, |
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shortHelpString=_("Show Layer")) |
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|
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bmp = resource.GetBitmapResource(HIDE_BMP, wxBITMAP_TYPE_XPM) |
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self.toolBar.AddTool(ID_LEGEND_HIDELAYER, bmp, |
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shortHelpString=_("Hide Layer")) |
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|
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bmp = resource.GetBitmapResource(PROPS_BMP, wxBITMAP_TYPE_XPM) |
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self.toolBar.AddTool(ID_LEGEND_PROPS, bmp, |
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shortHelpString=_("Edit Layer Properties")) |
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|
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self.toolBar.Realize() |
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panelBox.Add(self.toolBar, 0, wxGROW, 0) |
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|
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EVT_TOOL(self, ID_LEGEND_TOP, self._OnMoveTop) |
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EVT_TOOL(self, ID_LEGEND_RAISE, self._OnMoveUp) |
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EVT_TOOL(self, ID_LEGEND_LOWER, self._OnMoveDown) |
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EVT_TOOL(self, ID_LEGEND_BOTTOM, self._OnMoveBottom) |
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EVT_TOOL(self, ID_LEGEND_PROPS, self._OnProperties) |
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EVT_TOOL(self, ID_LEGEND_SHOWLAYER, self._OnShowLayer) |
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EVT_TOOL(self, ID_LEGEND_HIDELAYER, self._OnHideLayer) |
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|
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self.tree = LegendTree(self, ID_LEGEND_TREE, map, mainWindow) |
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|
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panelBox.Add(self.tree, 1, wxGROW, 0) |
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|
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self.scalebarbitmap = ScaleBarBitmap(self, map, mainWindow) |
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panelBox.Add(self.scalebarbitmap, 0, wxGROW, 0) |
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|
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self.SetAutoLayout(True) |
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self.SetSizer(panelBox) |
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panelBox.SetSizeHints(self) |
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|
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|
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self.panelBox = panelBox |
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|
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self.__EnableButtons(False) |
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|
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self.Create() |
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|
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EVT_CLOSE(self, self._OnClose) |
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|
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|
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def GetMap(self): |
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return self.tree.GetMap() |
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|
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def SetMap(self, map): |
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self.tree.SetMap(map) |
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self.scalebarbitmap.SetCanvas(self.mainWindow.canvas) |
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|
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def DoOnSelChanged(self, layer, group): |
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|
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ok = isinstance(layer, BaseLayer) |
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self.__EnableButtons(ok) |
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|
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self.mainWindow.SelectLayer(layer) |
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|
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def DoOnProperties(self): |
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list = self.tree.GetSelectedHierarchy() |
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|
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ok = isinstance(list[0], BaseLayer) |
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if ok: |
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self.mainWindow.OpenLayerProperties(list[0], list[1]) |
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|
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def Destroy(self): |
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self.__Close() |
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|
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def _OnProperties(self, event): |
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self.DoOnProperties() |
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|
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def _OnMoveTop(self, event): |
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self.tree.MoveCurrentItemTop() |
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|
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def _OnMoveUp(self, event): |
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self.tree.MoveCurrentItemUp() |
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|
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def _OnMoveDown(self, event): |
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self.tree.MoveCurrentItemDown() |
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|
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def _OnMoveBottom(self, event): |
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self.tree.MoveCurrentItemBottom() |
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|
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def _OnShowLayer(self, event): |
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self.tree.DoOnShowLayer() |
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pass |
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|
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#def Close(self, force = False): |
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#DockPanel.Close(self, force) |
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|
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def _OnClose(self, event): |
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self.__Close() |
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|
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def _OnHideLayer(self, event): |
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self.tree.DoOnHideLayer() |
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pass |
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|
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def __EnableButtons(self, on): |
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self.toolBar.EnableTool(ID_LEGEND_TOP, on) |
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self.toolBar.EnableTool(ID_LEGEND_RAISE, on) |
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self.toolBar.EnableTool(ID_LEGEND_LOWER, on) |
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self.toolBar.EnableTool(ID_LEGEND_BOTTOM, on) |
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self.toolBar.EnableTool(ID_LEGEND_SHOWLAYER, on) |
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self.toolBar.EnableTool(ID_LEGEND_HIDELAYER, on) |
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self.toolBar.EnableTool(ID_LEGEND_PROPS, on) |
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|
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def __Close(self): |
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self.tree.Close() |
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|
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class LegendTree(wxTreeCtrl): |
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|
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def __init__(self, parent, id, map, mainWindow): |
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wxTreeCtrl.__init__(self, parent, id, |
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style = wxTR_DEFAULT_STYLE | wxTR_HIDE_ROOT, |
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size = (200, 200)) |
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|
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self.mainWindow = mainWindow |
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self.map = None |
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self.parent = parent |
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self.changing_selection = 0 |
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|
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# |
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# The image list used by the wxTreeCtrl causes problems when |
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# we remove layers and/or change a classification because it |
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# changes the image indices if you remove images from the list. |
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# Rather than removing unused images we use this list to keep |
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# track of which indices are available in the image list |
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# (because of a previous removal) and then replace those indices |
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# with new images rather than appending to the end of the image |
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# list (assuming there are any that are available). |
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# |
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self.availImgListIndices = [] |
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|
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self.image_list = None |
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self.emptyImageIndex = 0 |
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|
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self.previewer = ClassDataPreviewer() |
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|
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EVT_TREE_ITEM_ACTIVATED(self, ID_LEGEND_TREE, self._OnItemActivated) |
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EVT_TREE_SEL_CHANGED(self, ID_LEGEND_TREE, self._OnSelChanged) |
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|
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EVT_CLOSE(self, self._OnClose) |
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|
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self.SetMap(map) |
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|
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def find_layer(self, layer): |
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"""Return the tree item for the layer""" |
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root = self.GetRootItem() |
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id, cookie = self.GetFirstChild(root, 0) |
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while id.IsOk(): |
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if self.GetPyData(id) is layer: |
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return id |
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id, cookie = self.GetNextChild(root, cookie) |
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return None |
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|
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def _OnClose(self, event): |
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self.SetMap(None) |
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|
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def GetMap(self): |
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return self.map |
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|
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def SetMap(self, map): |
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|
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sub_list = [(MAP_STACKING_CHANGED, self._OnMsgMapStackingChanged), |
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(MAP_LAYERS_ADDED, self._OnMsgMapLayersAdded), |
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(MAP_LAYERS_REMOVED, self._OnMsgMapLayersRemoved)] |
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|
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if self.map is not None: |
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for msg, func in sub_list: self.map.Unsubscribe(msg, func) |
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#self.mainWindow.application.Unsubscribe(SESSION_REPLACED, |
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#self._OnMsgMapsChanged) |
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#try: |
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#self.mainWindow.application.session.Unsubscribe(MAPS_CHANGED, |
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#self._OnMsgMapsChanged) |
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#except ConnectorError: |
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#pass |
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self.DeleteAllItems() |
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|
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self.map = map |
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|
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if self.map is not None: |
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for msg, func in sub_list: self.map.Subscribe(msg, func) |
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#self.mainWindow.application.session.Subscribe(MAPS_CHANGED, |
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#self._OnMsgMapsChanged) |
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#self.mainWindow.application.Subscribe(SESSION_REPLACED, |
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#self._OnMsgMapsChanged) |
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self.__FillTree(self.map) |
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|
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def MoveCurrentItemTop(self): |
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layer, group = self.GetSelectedHierarchy() |
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|
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if layer is not None: |
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self.map.MoveLayerToTop(layer) |
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else: |
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assert False, "Shouldn't be allowed." |
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pass |
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|
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def MoveCurrentItemUp(self): |
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layer, group = self.GetSelectedHierarchy() |
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|
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if layer is not None: |
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self.map.RaiseLayer(layer) |
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else: |
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assert False, "Shouldn't be allowed." |
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pass |
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|
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def MoveCurrentItemDown(self): |
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layer, group = self.GetSelectedHierarchy() |
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|
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if layer is not None: |
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self.map.LowerLayer(layer) |
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else: |
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assert False, "Shouldn't be allowed." |
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pass |
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|
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def MoveCurrentItemBottom(self): |
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layer, group = self.GetSelectedHierarchy() |
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|
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if layer is not None: |
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self.map.MoveLayerToBottom(layer) |
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else: |
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assert False, "Shouldn't be allowed." |
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pass |
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|
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def OnCompareItems(self, item1, item2): |
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|
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data1 = self.GetPyData(item1) |
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data2 = self.GetPyData(item2) |
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|
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if isinstance(data1, BaseLayer): |
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layers = self.map.Layers() |
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return layers.index(data2) - layers.index(data1) |
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else: |
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return wxTreeCtrl.OnCompareItems(self, item1, item2) |
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|
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def DoOnShowLayer(self): |
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layer, group = self.GetSelectedHierarchy() |
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layer.SetVisible(True) |
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|
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def DoOnHideLayer(self): |
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layer, group = self.GetSelectedHierarchy() |
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layer.SetVisible(False) |
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|
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def Sort(self): |
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self.SortChildren(self.GetRootItem()) |
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|
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def GetSelectedHierarchy(self): |
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id = self.GetSelection() |
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|
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if not id.IsOk(): |
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return (None, None) |
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|
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layer = self.GetPyData(id) |
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group = None |
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|
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if isinstance(layer, ClassGroup): |
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id = self.GetItemParent(id) |
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assert id.IsOk() |
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group = layer |
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layer = self.GetPyData(id) |
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|
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return (layer, group) |
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|
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def _OnMsgMapsChanged(self): |
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#print self.map is self.mainWindow.Map() |
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self.SetMap(self.mainWindow.Map()) |
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|
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def _OnSelChanged(self, event): |
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# If we change the selection from normalize_selection do nothing. |
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if self.changing_selection: |
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return |
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|
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self.normalize_selection() |
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self.__UpdateSelection() |
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|
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def normalize_selection(self): |
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"""Select the layer containing currently selected item""" |
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# This is really a workaround for a bug in wx where deleting a |
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# subtree with DeleteChildren does not update the selection |
| 364 |
# properly and can lead to segfaults later because the return |
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# value of GetSelection points to invalid data. |
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item = self.GetSelection() |
| 367 |
while item.IsOk(): |
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object = self.GetPyData(item) |
| 369 |
if isinstance(object, BaseLayer): |
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break |
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item = self.GetItemParent(item) |
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else: |
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# No layer was found in the chain of parents, so there's |
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# nothing we can do. |
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return |
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|
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self.changing_selection = 1 |
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try: |
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self.SelectItem(item) |
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finally: |
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self.changing_selection = 0 |
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|
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|
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def _OnItemActivated(self, event): |
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self.parent.DoOnProperties() |
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|
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def _OnMsgLayerChanged(self, layer): |
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assert isinstance(layer, BaseLayer) |
| 389 |
|
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id = self.find_layer(layer) |
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assert id is not None |
| 392 |
|
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self.__FillTreeLayer(id) |
| 394 |
self.__UpdateSelection() |
| 395 |
|
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def _OnMsgMapStackingChanged(self, *args): |
| 397 |
self.Sort() |
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id = self.GetSelection() |
| 399 |
|
| 400 |
if id.IsOk(): |
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self.EnsureVisible(id) |
| 402 |
self.__UpdateSelection() |
| 403 |
|
| 404 |
def _OnMsgMapLayersAdded(self, map): |
| 405 |
assert map is self.map |
| 406 |
|
| 407 |
# Build a dict with all layers known by the the tree as keys |
| 408 |
layers = {} |
| 409 |
root = self.GetRootItem() |
| 410 |
id, cookie = self.GetFirstChild(root, 0) |
| 411 |
while id.IsOk(): |
| 412 |
layers[self.GetPyData(id)] = 1 |
| 413 |
id, cookie = self.GetNextChild(root, cookie) |
| 414 |
|
| 415 |
# Add layers in the map but not in the dict |
| 416 |
i = 0 |
| 417 |
for l in map.Layers(): |
| 418 |
if not l in layers: |
| 419 |
self.__AddLayer(i, l) |
| 420 |
|
| 421 |
self.__UpdateSelection() |
| 422 |
|
| 423 |
def _OnMsgMapLayersRemoved(self, map): |
| 424 |
assert map is self.map |
| 425 |
|
| 426 |
layers = map.Layers() |
| 427 |
|
| 428 |
root = self.GetRootItem() |
| 429 |
id, cookie = self.GetFirstChild(root, 0) |
| 430 |
while id.IsOk(): |
| 431 |
if self.GetPyData(id) not in layers: |
| 432 |
self.__RemoveLayer(id) |
| 433 |
id, cookie = self.GetNextChild(root, cookie) |
| 434 |
|
| 435 |
|
| 436 |
self.__UpdateSelection() |
| 437 |
|
| 438 |
def _OnMsgLayerVisibilityChanged(self, layer): |
| 439 |
assert isinstance(layer, BaseLayer) |
| 440 |
|
| 441 |
self.__ShowHideLayer(layer) |
| 442 |
self.__UpdateSelection() |
| 443 |
|
| 444 |
def _OnMsgLayerTitleChanged(self, layer): |
| 445 |
|
| 446 |
id = self.find_layer(layer) |
| 447 |
if id.IsOk(): |
| 448 |
self.SetItemText(id, layer.Title()) |
| 449 |
self.__UpdateSelection() |
| 450 |
|
| 451 |
def __UpdateSelection(self): |
| 452 |
layer, group = self.GetSelectedHierarchy() |
| 453 |
self.parent.DoOnSelChanged(layer, group) |
| 454 |
|
| 455 |
def __FillTree(self, map): |
| 456 |
|
| 457 |
self.Freeze() |
| 458 |
|
| 459 |
self.DeleteAllItems() |
| 460 |
|
| 461 |
if map.HasLayers(): |
| 462 |
root = self.GetRootItem() |
| 463 |
for l in map.Layers(): |
| 464 |
self.__AddLayer(0, l) |
| 465 |
|
| 466 |
self.Thaw() |
| 467 |
|
| 468 |
def __FillTreeLayer(self, pid): |
| 469 |
layer = self.GetPyData(pid) |
| 470 |
|
| 471 |
self.Freeze() |
| 472 |
|
| 473 |
self.DeleteChildren(pid) |
| 474 |
|
| 475 |
if layer.HasClassification(): |
| 476 |
|
| 477 |
clazz = layer.GetClassification() |
| 478 |
|
| 479 |
shapeType = layer.ShapeType() |
| 480 |
|
| 481 |
show = layer.Visible() |
| 482 |
for g in clazz: |
| 483 |
if g.IsVisible(): |
| 484 |
id = self.AppendItem(pid, g.GetDisplayText()) |
| 485 |
self.SetPyData(id, g) |
| 486 |
self.__SetVisibilityStyle(show, id) |
| 487 |
|
| 488 |
bmp = self.__BuildGroupImage(g, shapeType) |
| 489 |
|
| 490 |
if bmp is None: |
| 491 |
self.SetItemImage(id, -1) |
| 492 |
self.SetItemSelectedImage(id, -1) |
| 493 |
else: |
| 494 |
if self.availImgListIndices: |
| 495 |
i = self.availImgListIndices.pop(0) |
| 496 |
self.image_list.Replace(i, bmp) |
| 497 |
else: |
| 498 |
i = self.image_list.Add(bmp) |
| 499 |
|
| 500 |
self.SetItemImage(id, i) |
| 501 |
self.SetItemSelectedImage(id, i) |
| 502 |
|
| 503 |
self.Thaw() |
| 504 |
|
| 505 |
def __BuildGroupImage(self, group, shapeType): |
| 506 |
|
| 507 |
bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H) |
| 508 |
#brush = wxBrush(Color2wxColour(item[1]), wxSOLID) |
| 509 |
dc = wxMemoryDC() |
| 510 |
dc.SelectObject(bmp) |
| 511 |
dc.Clear() |
| 512 |
|
| 513 |
self.previewer.Draw(dc, None, group.GetProperties(), shapeType) |
| 514 |
|
| 515 |
return bmp |
| 516 |
|
| 517 |
def DeleteAllItems(self): |
| 518 |
|
| 519 |
pid = self.GetRootItem() |
| 520 |
|
| 521 |
id, cookie = self.GetFirstChild(pid, 123) |
| 522 |
while id.IsOk(): |
| 523 |
self.__RemoveLayer(id) |
| 524 |
id, cookie = self.GetNextChild(pid, cookie) |
| 525 |
|
| 526 |
wxTreeCtrl.DeleteAllItems(self) |
| 527 |
|
| 528 |
def __AddLayer(self, before, l): |
| 529 |
root = self.GetRootItem() |
| 530 |
id = self.InsertItemBefore(root, before, |
| 531 |
l.Title(), |
| 532 |
self.mapImageIndex, |
| 533 |
self.mapImageIndex) |
| 534 |
|
| 535 |
self.SetPyData(id, l) |
| 536 |
self.__SetVisibilityStyle(l.Visible(), id) |
| 537 |
|
| 538 |
self.__FillTreeLayer(id) |
| 539 |
self.Expand(id) |
| 540 |
|
| 541 |
l.Subscribe(LAYER_CHANGED, self._OnMsgLayerChanged) |
| 542 |
l.Subscribe(LAYER_VISIBILITY_CHANGED, |
| 543 |
self._OnMsgLayerVisibilityChanged) |
| 544 |
l.Subscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged) |
| 545 |
|
| 546 |
def __RemoveLayer(self, id): |
| 547 |
self.DeleteChildren(id) |
| 548 |
|
| 549 |
layer = self.GetPyData(id) |
| 550 |
layer.Unsubscribe(LAYER_CHANGED, |
| 551 |
self._OnMsgLayerChanged) |
| 552 |
layer.Unsubscribe(LAYER_VISIBILITY_CHANGED, |
| 553 |
self._OnMsgLayerVisibilityChanged) |
| 554 |
layer.Unsubscribe(TITLE_CHANGED, self._OnMsgLayerTitleChanged) |
| 555 |
|
| 556 |
self.Delete(id) |
| 557 |
|
| 558 |
def DeleteChildren(self, pid): |
| 559 |
id, cookie = self.GetFirstChild(pid, 123) |
| 560 |
while id.IsOk(): |
| 561 |
self.availImgListIndices.append(self.GetItemImage(id)) |
| 562 |
id, cookie = self.GetNextChild(pid, cookie) |
| 563 |
wxTreeCtrl.DeleteChildren(self, pid) |
| 564 |
|
| 565 |
def GetRootItem(self): |
| 566 |
root = wxTreeCtrl.GetRootItem(self) |
| 567 |
|
| 568 |
if not root.IsOk(): |
| 569 |
self.image_list = wxImageList(BMP_SIZE_W, BMP_SIZE_H, False, 0) |
| 570 |
|
| 571 |
bmp = wxEmptyBitmap(BMP_SIZE_W, BMP_SIZE_H) |
| 572 |
dc = wxMemoryDC() |
| 573 |
dc.SelectObject(bmp) |
| 574 |
dc.SetBrush(wxBLACK_BRUSH) |
| 575 |
dc.Clear() |
| 576 |
dc.SelectObject(wxNullBitmap) |
| 577 |
|
| 578 |
self.emptyImageIndex = \ |
| 579 |
self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0)) |
| 580 |
|
| 581 |
bmp = resource.GetBitmapResource("legend_icon_layer", |
| 582 |
wxBITMAP_TYPE_XPM) |
| 583 |
self.mapImageIndex = \ |
| 584 |
self.image_list.Add(bmp) |
| 585 |
|
| 586 |
self.AssignImageList(self.image_list) |
| 587 |
self.availImgListIndices = [] |
| 588 |
|
| 589 |
root = self.AddRoot("") |
| 590 |
|
| 591 |
return root |
| 592 |
|
| 593 |
def __SetVisibilityStyle(self, visible, id): |
| 594 |
font = self.GetItemFont(id) |
| 595 |
|
| 596 |
if visible: |
| 597 |
font.SetStyle(wxNORMAL) |
| 598 |
color = wxBLACK |
| 599 |
else: |
| 600 |
#font.SetStyle(wxITALIC) |
| 601 |
font.SetStyle(wxNORMAL) |
| 602 |
color = wxLIGHT_GREY |
| 603 |
|
| 604 |
self.SetItemTextColour(id, color) |
| 605 |
self.SetItemFont(id, font) |
| 606 |
|
| 607 |
def __ShowHideLayer(self, layer): |
| 608 |
parent = self.find_layer(layer) |
| 609 |
assert parent.IsOk() |
| 610 |
|
| 611 |
visible = layer.Visible() |
| 612 |
|
| 613 |
self.__SetVisibilityStyle(visible, parent) |
| 614 |
|
| 615 |
id, cookie = self.GetFirstChild(parent, 123) |
| 616 |
|
| 617 |
while id.IsOk(): |
| 618 |
self.__SetVisibilityStyle(visible, id) |
| 619 |
id, cookie = self.GetNextChild(parent, cookie) |
| 620 |
|
| 621 |
class ScaleBarBitmap(wxBoxSizer): |
| 622 |
|
| 623 |
def __init__(self, parent, map, mainWindow): |
| 624 |
# While the width is fixed, get the height _now_. |
| 625 |
dc = wxMemoryDC() |
| 626 |
textwidth, textheight = dc.GetTextExtent("%d"%0) |
| 627 |
self.width = 210 |
| 628 |
self.height = textheight + 3*2 + 8 |
| 629 |
|
| 630 |
wxBoxSizer.__init__(self, wxVERTICAL) |
| 631 |
bmp=wxEmptyBitmap(self.width, self.height) |
| 632 |
self.scalebarBitmap = wxStaticBitmap(parent, -1, bmp) |
| 633 |
self.Add(self.scalebarBitmap, 0, wxALIGN_CENTER|wxLEFT|wxTOP|wxRIGHT, 1) |
| 634 |
|
| 635 |
self.mainWindow = mainWindow |
| 636 |
self.parent = parent |
| 637 |
self.canvas = None |
| 638 |
self.SetCanvas(self.mainWindow.canvas) |
| 639 |
|
| 640 |
def SetCanvas(self, canvas): |
| 641 |
sub_list = [(SCALE_CHANGED, self._OnMsgScaleChanged)] |
| 642 |
|
| 643 |
if self.canvas is not None: |
| 644 |
for msg, func in sub_list: self.canvas.Unsubscribe(msg, func) |
| 645 |
|
| 646 |
self.canvas = canvas |
| 647 |
self.scalebar = ScaleBar(canvas.map) |
| 648 |
|
| 649 |
if self.canvas is not None: |
| 650 |
for msg, func in sub_list: self.canvas.Subscribe(msg, func) |
| 651 |
self.__SetScale(self.canvas.scale) |
| 652 |
|
| 653 |
def _OnMsgScaleChanged(self, scale): |
| 654 |
self.__SetScale(scale) |
| 655 |
|
| 656 |
def __SetScale(self, scale): |
| 657 |
bmp = wxEmptyBitmap(self.width, self.height) |
| 658 |
dc = wxMemoryDC() |
| 659 |
dc.SelectObject(bmp) |
| 660 |
dc.Clear() |
| 661 |
|
| 662 |
if self.canvas.map.projection is not None: |
| 663 |
self.scalebar.DrawScaleBar(scale, dc, (0,0), dc.GetSizeTuple()) |
| 664 |
|
| 665 |
self.scalebarBitmap.SetBitmap(bmp) |
| 666 |
|
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