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# Copyright (c) 2001 by Intevation GmbH |
# opyright (c) 2001, 2002, 2003, 2004 by Intevation GmbH |
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# Authors: |
# Authors: |
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# Bernhard Herzog <[email protected]> |
# Bernhard Herzog <[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) |
# This program is free software under the GPL (>=v2) |
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# Read the file COPYING coming with Thuban for details. |
# Read the file COPYING coming with Thuban for details. |
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Classes for display of a map and interaction with it |
Classes for display of a map and interaction with it |
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""" |
""" |
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__version__ = "$Revision$" |
from __future__ import generators |
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from math import hypot |
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from wxPython.wx import wxWindow,\ |
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wxPaintDC, wxColour, wxClientDC, wxINVERT, wxTRANSPARENT_BRUSH, wxFont,\ |
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EVT_PAINT, EVT_LEFT_DOWN, EVT_LEFT_UP, EVT_MOTION |
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__version__ = "$Revision$" |
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# $Source$ |
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# $Id$ |
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from wxPython import wx |
import os.path |
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import time |
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import traceback |
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from wxproj import point_in_polygon_shape, shape_centroid |
import wx |
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# Export related stuff |
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if wx.Platform == '__WXMSW__': |
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from wx import MetaFileDC |
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from Thuban.Model.messages import MAP_PROJECTION_CHANGED, \ |
from Thuban import _ |
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LAYERS_CHANGED, LAYER_LEGEND_CHANGED, LAYER_VISIBILITY_CHANGED |
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from Thuban.Model.layer import SHAPETYPE_POLYGON, SHAPETYPE_ARC, \ |
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SHAPETYPE_POINT |
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from Thuban.Model.label import ALIGN_CENTER, ALIGN_TOP, ALIGN_BOTTOM, \ |
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ALIGN_LEFT, ALIGN_RIGHT |
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from Thuban.Model.messages import MAP_LAYERS_CHANGED, LAYER_CHANGED, \ |
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LAYER_VISIBILITY_CHANGED |
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from renderer import ScreenRenderer, PrinterRender |
from renderer import ScreenRenderer, ExportRenderer, PrinterRenderer |
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import labeldialog |
import labeldialog |
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from messages import SELECTED_SHAPE |
from viewport import ViewPort, PanTool, output_transform |
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class CanvasPanTool(PanTool): |
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# |
"""The Canvas Pan Tool""" |
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# The tools |
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# |
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class Tool: |
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""" |
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Base class for the interactive tools |
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""" |
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def __init__(self, view): |
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"""Intitialize the tool. The view is the canvas displaying the map""" |
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self.view = view |
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self.start = self.current = None |
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self.dragging = 0 |
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self.drawn = 0 |
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def Name(self): |
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"""Return the tool's name""" |
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return '' |
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def drag_start(self, x, y): |
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self.start = self.current = x, y |
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self.dragging = 1 |
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def drag_move(self, x, y): |
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self.current = x, y |
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def drag_stop(self, x, y): |
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self.current = x, y |
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self.dragging = 0 |
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def Show(self, dc): |
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if not self.drawn: |
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self.draw(dc) |
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self.drawn = 1 |
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def Hide(self, dc): |
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if self.drawn: |
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self.draw(dc) |
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self.drawn = 0 |
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def draw(self, dc): |
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pass |
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def MouseDown(self, event): |
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self.drag_start(event.m_x, event.m_y) |
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def MouseMove(self, event): |
def MouseMove(self, event): |
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if self.dragging: |
if self.dragging: |
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self.drag_move(event.m_x, event.m_y) |
PanTool.MouseMove(self, event) |
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def MouseUp(self, event): |
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if self.dragging: |
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self.drag_move(event.m_x, event.m_y) |
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def Cancel(self): |
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self.dragging = 0 |
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class RectTool(Tool): |
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"""Base class for tools that draw rectangles while dragging""" |
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def draw(self, dc): |
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sx, sy = self.start |
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cx, cy = self.current |
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dc.DrawRectangle(sx, sy, cx - sx, cy - sy) |
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class ZoomInTool(RectTool): |
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"""The Zoom-In Tool""" |
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def Name(self): |
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return "ZoomInTool" |
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def proj_rect(self): |
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"""return the rectangle given by start and current in projected |
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coordinates""" |
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sx, sy = self.start |
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cx, cy = self.current |
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left, top = self.view.win_to_proj(sx, sy) |
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right, bottom = self.view.win_to_proj(cx, cy) |
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return (min(left, right), min(top, bottom), |
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max(left, right), max(top, bottom)) |
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def MouseUp(self, event): |
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if self.dragging: |
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Tool.MouseUp(self, event) |
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sx, sy = self.start |
sx, sy = self.start |
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cx, cy = self.current |
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if sx == cx and sy == cy: |
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# Just a mouse click. Simply zoom in by a factor of two |
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self.view.ZoomFactor(2, center = (cx, cy)) |
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else: |
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# A drag. Zoom in to the rectangle |
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self.view.FitRectToWindow(self.proj_rect()) |
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class ZoomOutTool(RectTool): |
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"""The Zoom-Out Tool""" |
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def Name(self): |
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return "ZoomOutTool" |
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def MouseUp(self, event): |
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if self.dragging: |
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Tool.MouseUp(self, event) |
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sx, sy = self.start |
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cx, cy = self.current |
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if sx == cx and sy == cy: |
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# Just a mouse click. Simply zoom out by a factor of two |
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self.view.ZoomFactor(0.5, center = (cy, cy)) |
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else: |
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# A drag. Zoom out to the rectangle |
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self.view.ZoomOutToRect((min(sx, cx), min(sy, cy), |
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max(sx, cx), max(sy, cy))) |
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class PanTool(Tool): |
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"""The Pan Tool""" |
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def Name(self): |
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return "PanTool" |
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def MouseMove(self, event): |
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if self.dragging: |
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x0, y0 = self.current |
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Tool.MouseMove(self, event) |
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x, y = self.current |
x, y = self.current |
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width, height = self.view.GetSizeTuple() |
width, height = self.view.GetSizeTuple() |
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dc = self.view.drag_dc |
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dc.Blit(0, 0, width, height, dc, x0 - x, y0 - y) |
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def MouseUp(self, event): |
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if self.dragging: |
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Tool.MouseUp(self, event) |
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sx, sy = self.start |
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cx, cy = self.current |
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self.view.Translate(cx - sx, cy - sy) |
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class IdentifyTool(Tool): |
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"""The "Identify" Tool""" |
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def Name(self): |
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return "IdentifyTool" |
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def MouseUp(self, event): |
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self.view.SelectShapeAt(event.m_x, event.m_y) |
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class LabelTool(Tool): |
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"""The "Label" Tool""" |
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def Name(self): |
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return "LabelTool" |
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def MouseUp(self, event): |
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self.view.LabelShapeAt(event.m_x, event.m_y) |
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bitmapdc = wx.MemoryDC() |
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bitmapdc.SelectObject(self.view.PreviewBitmap()) |
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dc = self.view.drag_dc |
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dc.Blit(0, 0, width, height, bitmapdc, sx - x, sy - y) |
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class MapPrintout(wx.wxPrintout): |
class MapPrintout(wx.Printout): |
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""" |
""" |
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wxPrintout class for printing Thuban maps |
wxPrintout class for printing Thuban maps |
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""" |
""" |
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def __init__(self, map): |
def __init__(self, canvas, map, region, selected_layer, selected_shapes): |
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wx.wxPrintout.__init__(self) |
wx.Printout.__init__(self) |
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self.canvas = canvas |
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self.map = map |
self.map = map |
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self.region = region |
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self.selected_layer = selected_layer |
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self.selected_shapes = selected_shapes |
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def GetPageInfo(self): |
def GetPageInfo(self): |
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return (1, 1, 1, 1) |
return (1, 1, 1, 1) |
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def draw_on_dc(self, dc): |
def draw_on_dc(self, dc): |
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width, height = self.GetPageSizePixels() |
width, height = self.GetPageSizePixels() |
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llx, lly, urx, ury = self.map.ProjectedBoundingBox() |
scale, offset, mapregion = output_transform(self.canvas.scale, |
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scalex = width / (urx - llx) |
self.canvas.offset, |
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scaley = height / (ury - lly) |
self.canvas.GetSizeTuple(), |
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scale = min(scalex, scaley) |
self.GetPageSizePixels()) |
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offx = 0.5 * (width - (urx + llx) * scale) |
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offy = 0.5 * (height + (ury + lly) * scale) |
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resx, resy = self.GetPPIPrinter() |
resx, resy = self.GetPPIPrinter() |
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renderer = PrinterRender(dc, scale, (offx, offy), resolution = resx) |
canvas_scale = self.canvas.scale |
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renderer.RenderMap(self.map) |
x, y, width, height = self.region |
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return wx.true |
renderer = PrinterRenderer(dc, self.map, scale, offset, |
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region = (mapregion[0], mapregion[1], |
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(width/canvas_scale)*scale, |
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(height/canvas_scale)*scale), |
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resolution = resy, |
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destination_region = mapregion) |
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renderer.RenderMap(self.selected_layer, self.selected_shapes) |
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return True |
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class MapCanvas(wxWindow): |
class MapCanvas(wx.Window, ViewPort): |
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"""A widget that displays a map and offers some interaction""" |
"""A widget that displays a map and offers some interaction""" |
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def __init__(self, parent, winid, interactor): |
def __init__(self, parent, winid): |
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wxWindow.__init__(self, parent, winid) |
wx.Window.__init__(self, parent, winid) |
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self.SetBackgroundColour(wxColour(255, 255, 255)) |
ViewPort.__init__(self) |
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self.map = None |
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self.scale = 1.0 |
self.SetBackgroundColour(wx.Colour(255, 255, 255)) |
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self.offset = (0, 0) |
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self.dragging = 0 |
# the bitmap serving as backing store |
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self.tool = None |
self.bitmap = None |
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self.redraw_on_idle = 0 |
# the monochrome bitmap with the selection if any |
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EVT_PAINT(self, self.OnPaint) |
self.selection_bitmap = None |
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EVT_LEFT_DOWN(self, self.OnLeftDown) |
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EVT_LEFT_UP(self, self.OnLeftUp) |
self.backgroundColor = wx.WHITE_BRUSH |
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EVT_MOTION(self, self.OnMotion) |
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wx.EVT_IDLE(self, self.OnIdle) |
# The rendering iterator object. Used when rendering |
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self.interactor = interactor |
# incrementally |
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self.interactor.Subscribe(SELECTED_SHAPE, self.shape_selected) |
self.render_iter = None |
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# subscribe the WX events we're interested in |
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self.Bind(wx.EVT_PAINT, self.OnPaint) |
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self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown) |
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self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp) |
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self.Bind(wx.EVT_MIDDLE_DOWN, self.OnMiddleDown) |
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self.Bind(wx.EVT_MIDDLE_UP, self.OnMiddleUp) |
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self.Bind(wx.EVT_MOTION, self.OnMotion) |
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self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveWindow) |
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self.Bind(wx.EVT_SIZE, self.OnSize) |
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self.Bind(wx.EVT_IDLE, self.OnIdle) |
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def __del__(self): |
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wx.Window.__del__(self) |
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ViewPort.__del__(self) |
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def PreviewBitmap(self): |
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return self.bitmap |
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def PanTool(self): |
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"""Start the canvas pan tool""" |
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self.SelectTool(CanvasPanTool(self)) |
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def SetMap(self, map): |
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redraw_channels = (MAP_LAYERS_CHANGED, LAYER_CHANGED, |
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LAYER_VISIBILITY_CHANGED) |
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if self.Map() is not None: |
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for channel in redraw_channels: |
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self.Map().Unsubscribe(channel, self.full_redraw) |
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ViewPort.SetMap(self, map) |
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if self.Map() is not None: |
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for channel in redraw_channels: |
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self.Map().Subscribe(channel, self.full_redraw) |
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# force a redraw. If map is not empty, it's already been called |
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# by FitMapToWindow but if map is empty it hasn't been called |
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# yet so we have to explicitly call it. |
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self.full_redraw() |
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def OnPaint(self, event): |
def OnPaint(self, event): |
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dc = wxPaintDC(self) |
dc = wx.PaintDC(self) |
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if self.map is not None and self.map.HasLayers(): |
if self.Map() is not None and self.Map().HasLayers(): |
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# We have a non-empty map. Redraw it in idle time |
if self.bitmap is not None: |
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self.redraw_on_idle = 1 |
dc.BeginDrawing() |
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dc.DrawBitmap(self.bitmap, 0, 0) |
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if self.selection_bitmap is not None: |
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dc.DrawBitmap(self.selection_bitmap, 0, 0, True) |
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dc.EndDrawing() |
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else: |
else: |
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# If we've got no map or if the map is empty, simply clear |
# If we've got no map or if the map is empty, simply clear |
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# the screen. |
# the screen. |
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# XXX it's probably possible to get rid of this. The |
# XXX it's probably possible to get rid of this. The |
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# background color of the window is already white and the |
# background color of the window is already white and the |
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# only thing we may have to do is to call self.Refresh() |
# only thing we may have to do is to call self.Refresh() |
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# with a true argument in the right places. |
# with a true argument in the right places. |
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dc.BeginDrawing() |
dc.BeginDrawing() |
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dc.Clear() |
dc.SetBackground(self.backgroundColor) |
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dc.Clear() |
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dc.EndDrawing() |
dc.EndDrawing() |
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def do_redraw(self): |
def OnIdle(self, event): |
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# This should only be called if we have a non-empty map. We draw |
"""Idle handler. Redraw the bitmap if necessary""" |
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# it into a memory DC and then blit it to the screen. |
if (self.Map() is not None |
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width, height = self.GetSizeTuple() |
and (self.bitmap is None |
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bitmap = wx.wxEmptyBitmap(width, height) |
or self.render_iter is not None |
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dc = wx.wxMemoryDC() |
or (self.HasSelectedShapes() |
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dc.SelectObject(bitmap) |
and self.selection_bitmap is None))): |
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dc.BeginDrawing() |
event.RequestMore(self._do_redraw()) |
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# clear the background |
def _do_redraw(self): |
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dc.SetBrush(wx.wxWHITE_BRUSH) |
"""Redraw a bit and return whether this method has to be called again. |
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dc.SetPen(wx.wxTRANSPARENT_PEN) |
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dc.DrawRectangle(0, 0, width, height) |
Called by OnIdle to handle the actual redraw. Redraw is |
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incremental for both the bitmap with the normal layers and the |
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if 1: #self.interactor.selected_map is self.map: |
bitmap with the selection. |
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selected_layer = self.interactor.selected_layer |
""" |
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selected_shape = self.interactor.selected_shape |
finished = False |
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if self.render_iter is not None: |
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try: |
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if self.render_iter.next(): |
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# Redraw if the last preview redraw was some time |
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# ago and the user is not currently dragging the |
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# mouse because redrawing would interfere with what |
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# the current tool is drawing on the window. |
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if not self.dragging \ |
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and time.time() - self.render_last_preview > 0.5: |
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client_dc = wx.ClientDC(self) |
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client_dc.BeginDrawing() |
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client_dc.DrawBitmap(self.bitmap, 0, 0) |
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client_dc.EndDrawing() |
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self.render_last_preview = time.time() |
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else: |
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self.render_iter = None |
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# Redraw if not dragging because redrawing would |
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# interfere with what the current tool is drawing on |
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# the window. |
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if not self.dragging: |
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self.redraw() |
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finished = True |
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except StopIteration: |
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finished = True |
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self.render_iter = None |
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except: |
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finished = True |
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self.render_iter = None |
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traceback.print_exc() |
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else: |
else: |
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selected_layer = None |
self.render_iter = self._render_iterator() |
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selected_shape = None |
self.render_last_preview = time.time() |
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return not finished |
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# draw the map into the bitmap |
def _render_iterator(self): |
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renderer = ScreenRenderer(dc, self.scale, self.offset) |
width, height = self.GetSizeTuple() |
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renderer.RenderMap(self.map, selected_layer, selected_shape) |
dc = wx.MemoryDC() |
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dc.EndDrawing() |
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# blit the bitmap to the screen |
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clientdc = wxClientDC(self) |
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clientdc.BeginDrawing() |
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clientdc.Blit(0, 0, width, height, dc, 0, 0) |
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clientdc.EndDrawing() |
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def Print(self): |
render_start = time.time() |
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printer = wx.wxPrinter() |
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printout = MapPrintout(self.map) |
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printer.Print(self, printout, wx.true) |
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printout.Destroy() |
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def SetMap(self, map): |
|
|
redraw_channels = (LAYERS_CHANGED, LAYER_LEGEND_CHANGED, |
|
|
LAYER_VISIBILITY_CHANGED) |
|
|
if self.map is not None: |
|
|
for channel in redraw_channels: |
|
|
self.map.Unsubscribe(channel, self.redraw) |
|
|
self.map.Unsubscribe(MAP_PROJECTION_CHANGED, |
|
|
self.projection_changed) |
|
|
self.map = map |
|
|
if self.map is not None: |
|
|
for channel in redraw_channels: |
|
|
self.map.Subscribe(channel, self.redraw) |
|
|
self.map.Subscribe(MAP_PROJECTION_CHANGED, self.projection_changed) |
|
|
self.FitMapToWindow() |
|
|
# force a redraw. If map is not empty, it's already been called |
|
|
# by FitMapToWindow but if map is empty it hasn't been called |
|
|
# yet so we have to explicitly call it. |
|
|
self.redraw() |
|
| 239 |
|
|
| 240 |
def Map(self): |
if self.bitmap is None: |
| 241 |
return self.map |
self.bitmap = wx.EmptyBitmap(width, height) |
| 242 |
|
dc.SelectObject(self.bitmap) |
| 243 |
|
dc.BeginDrawing() |
| 244 |
|
|
| 245 |
def redraw(self, *args): |
dc.SetBackground(self.backgroundColor) |
| 246 |
self.Refresh(0) |
dc.Clear() |
| 247 |
|
|
| 248 |
def projection_changed(self, *args): |
# draw the map into the bitmap |
| 249 |
self.FitMapToWindow() |
renderer = ScreenRenderer(dc, self.Map(), self.scale, self.offset, |
| 250 |
self.redraw() |
(0, 0, width, height)) |
| 251 |
|
for cont in renderer.RenderMapIncrementally(): |
| 252 |
|
yield True |
| 253 |
|
|
| 254 |
def set_view_transform(self, scale, offset): |
dc.EndDrawing() |
| 255 |
self.scale = scale |
dc.SelectObject(wx.NullBitmap) |
|
self.offset = offset |
|
|
self.redraw() |
|
| 256 |
|
|
| 257 |
def proj_to_win(self, x, y): |
if self.HasSelectedShapes() and self.selection_bitmap is None: |
| 258 |
"""\ |
bitmap = wx.EmptyBitmap(width, height) |
| 259 |
Return the point in window coords given by projected coordinates x y |
dc.SelectObject(bitmap) |
| 260 |
""" |
dc.BeginDrawing() |
| 261 |
offx, offy = self.offset |
dc.SetBackground(wx.WHITE_BRUSH) |
| 262 |
return (self.scale * x + offx, -self.scale * y + offy) |
dc.Clear() |
| 263 |
|
|
| 264 |
def win_to_proj(self, x, y): |
renderer = ScreenRenderer(dc, self.Map(), self.scale, self.offset, |
| 265 |
"""\ |
(0, 0, width, height)) |
| 266 |
Return the point in projected coordinates given by window coords x y |
layer = self.SelectedLayer() |
| 267 |
""" |
shapes = self.selection.SelectedShapes() |
| 268 |
offx, offy = self.offset |
for cont in renderer.draw_selection_incrementally(layer, shapes): |
| 269 |
return ((x - offx) / self.scale, (offy - y) / self.scale) |
yield True |
| 270 |
|
|
| 271 |
def FitRectToWindow(self, rect): |
dc.EndDrawing() |
| 272 |
width, height = self.GetSizeTuple() |
dc.SelectObject(wx.NullBitmap) |
| 273 |
llx, lly, urx, ury = rect |
|
| 274 |
if llx == urx or lly == ury: |
bitmap.SetMask(wx.Mask(bitmap, wx.WHITE)) |
| 275 |
# zero with or zero height. Do Nothing |
self.selection_bitmap = bitmap |
| 276 |
return |
|
| 277 |
scalex = width / (urx - llx) |
yield False |
| 278 |
scaley = height / (ury - lly) |
|
| 279 |
scale = min(scalex, scaley) |
def Export(self): |
| 280 |
offx = 0.5 * (width - (urx + llx) * scale) |
|
| 281 |
offy = 0.5 * (height + (ury + lly) * scale) |
if hasattr(self, "export_path"): |
| 282 |
self.set_view_transform(scale, (offx, offy)) |
export_path = self.export_path |
|
|
|
|
def FitMapToWindow(self): |
|
|
"""\ |
|
|
Set the scale and offset so that the map is centered in the |
|
|
window |
|
|
""" |
|
|
bbox = self.map.ProjectedBoundingBox() |
|
|
if bbox is not None: |
|
|
self.FitRectToWindow(bbox) |
|
|
|
|
|
def ZoomFactor(self, factor, center = None): |
|
|
"""Multiply the zoom by factor and center on center. |
|
|
|
|
|
The optional parameter center is a point in window coordinates |
|
|
that should be centered. If it is omitted, it defaults to the |
|
|
center of the window |
|
|
""" |
|
|
width, height = self.GetSizeTuple() |
|
|
scale = self.scale * factor |
|
|
offx, offy = self.offset |
|
|
if center is not None: |
|
|
cx, cy = center |
|
| 283 |
else: |
else: |
| 284 |
cx = width / 2 |
export_path="." |
| 285 |
cy = height / 2 |
dlg = wx.FileDialog(self, _("Export Map"), export_path, "", |
| 286 |
offset = (factor * (offx - cx) + width / 2, |
"Enhanced Metafile (*.wmf)|*.wmf", |
| 287 |
factor * (offy - cy) + height / 2) |
wx.SAVE|wx.OVERWRITE_PROMPT) |
| 288 |
self.set_view_transform(scale, offset) |
if dlg.ShowModal() == wx.ID_OK: |
| 289 |
|
self.export_path = os.path.dirname(dlg.GetPath()) |
| 290 |
|
dc = wx.MetaFileDC(dlg.GetPath()) |
| 291 |
|
|
| 292 |
|
scale, offset, mapregion = output_transform(self.scale, |
| 293 |
|
self.offset, |
| 294 |
|
self.GetSizeTuple(), |
| 295 |
|
dc.GetSizeTuple()) |
| 296 |
|
|
| 297 |
|
selected_layer = self.selection.SelectedLayer() |
| 298 |
|
selected_shapes = self.selection.SelectedShapes() |
| 299 |
|
|
| 300 |
|
width, height = self.GetSizeTuple() |
| 301 |
|
renderer = ExportRenderer(dc, self.Map(), scale, offset, |
| 302 |
|
region = (0, 0, |
| 303 |
|
(width/self.scale)*scale, |
| 304 |
|
(height/self.scale)*scale), |
| 305 |
|
destination_region = mapregion) |
| 306 |
|
renderer.RenderMap(selected_layer, selected_shapes) |
| 307 |
|
|
| 308 |
def ZoomOutToRect(self, rect): |
dc.EndDrawing() |
| 309 |
# rect is given in window coordinates |
dc.Close() |
| 310 |
|
dlg.Destroy() |
| 311 |
|
|
| 312 |
# determine the bbox of the displayed region in projected |
def Print(self): |
| 313 |
# coordinates |
printer = wx.Printer() |
| 314 |
width, height = self.GetSizeTuple() |
width, height = self.GetSizeTuple() |
| 315 |
llx, lly = self.win_to_proj(0, height - 1) |
selected_layer = self.selection.SelectedLayer() |
| 316 |
urx, ury = self.win_to_proj(width - 1, 0) |
selected_shapes = self.selection.SelectedShapes() |
| 317 |
|
|
| 318 |
sx, sy, ex, ey = rect |
printout = MapPrintout(self, self.Map(), (0, 0, width, height), |
| 319 |
scalex = (ex - sx) / (urx - llx) |
selected_layer, selected_shapes) |
| 320 |
scaley = (ey - sy) / (ury - lly) |
printer.Print(self, printout, True) |
| 321 |
scale = min(scalex, scaley) |
printout.Destroy() |
|
|
|
|
offx = 0.5 * ((ex + sx) - (urx + llx) * scale) |
|
|
offy = 0.5 * ((ey + sy) + (ury + lly) * scale) |
|
|
self.set_view_transform(scale, (offx, offy)) |
|
|
|
|
|
def Translate(self, dx, dy): |
|
|
offx, offy = self.offset |
|
|
self.set_view_transform(self.scale, (offx + dx, offy + dy)) |
|
| 322 |
|
|
| 323 |
def ZoomInTool(self): |
def redraw(self, *args): |
| 324 |
self.tool = ZoomInTool(self) |
self.Refresh(False) |
| 325 |
|
|
| 326 |
def ZoomOutTool(self): |
def full_redraw(self, *args): |
| 327 |
self.tool = ZoomOutTool(self) |
self.bitmap = None |
| 328 |
|
self.selection_bitmap = None |
| 329 |
|
self.render_iter = None |
| 330 |
|
self.redraw() |
| 331 |
|
|
| 332 |
def PanTool(self): |
def redraw_selection(self, *args): |
| 333 |
self.tool = PanTool(self) |
self.selection_bitmap = None |
| 334 |
|
self.render_iter = None |
| 335 |
|
self.redraw() |
| 336 |
|
|
| 337 |
def IdentifyTool(self): |
def map_projection_changed(self, map, old_proj): |
| 338 |
self.tool = IdentifyTool(self) |
ViewPort.map_projection_changed(self, map, old_proj) |
| 339 |
|
self.full_redraw() |
| 340 |
|
|
| 341 |
|
def layer_projection_changed(self, *args): |
| 342 |
|
ViewPort.layer_projection_changed(self, args) |
| 343 |
|
self.full_redraw() |
| 344 |
|
|
| 345 |
|
def set_view_transform(self, scale, offset): |
| 346 |
|
ViewPort.set_view_transform(self, scale, offset) |
| 347 |
|
self.full_redraw() |
| 348 |
|
|
| 349 |
def LabelTool(self): |
def GetPortSizeTuple(self): |
| 350 |
self.tool = LabelTool(self) |
return self.GetSizeTuple() |
| 351 |
|
|
| 352 |
def CurrentTool(self): |
def OnMiddleDown(self, event): |
| 353 |
return self.tool and self.tool.Name() or None |
self.remembertool = self.tool |
| 354 |
|
if self.Map() is not None and self.Map().HasLayers(): |
| 355 |
|
self.PanTool() |
| 356 |
|
self.OnLeftDown(event) |
| 357 |
|
|
| 358 |
|
def OnMiddleUp(self, event): |
| 359 |
|
self.OnLeftUp(event) |
| 360 |
|
if self.remembertool: |
| 361 |
|
self.SelectTool(self.remembertool) |
| 362 |
|
|
| 363 |
def OnLeftDown(self, event): |
def OnLeftDown(self, event): |
| 364 |
|
self.MouseLeftDown(event) |
| 365 |
if self.tool is not None: |
if self.tool is not None: |
| 366 |
self.drag_dc = wxClientDC(self) |
self.drag_dc = wx.ClientDC(self) |
| 367 |
self.drag_dc.SetLogicalFunction(wxINVERT) |
self.drag_dc.SetLogicalFunction(wx.INVERT) |
| 368 |
self.drag_dc.SetBrush(wxTRANSPARENT_BRUSH) |
self.drag_dc.SetBrush(wx.TRANSPARENT_BRUSH) |
|
self.CaptureMouse() |
|
|
self.tool.MouseDown(event) |
|
| 369 |
self.tool.Show(self.drag_dc) |
self.tool.Show(self.drag_dc) |
| 370 |
|
self.CaptureMouse() |
| 371 |
self.dragging = 1 |
self.dragging = 1 |
| 372 |
|
|
| 373 |
def OnLeftUp(self, event): |
def OnLeftUp(self, event): |
| 374 |
self.ReleaseMouse() |
"""Handle EVT_LEFT_UP |
| 375 |
|
|
| 376 |
|
Release the mouse if it was captured, if a tool is active call |
| 377 |
|
its Hide method and call self.MouseLeftUp. |
| 378 |
|
""" |
| 379 |
|
# It's important that ReleaseMouse is called before MouseLeftUp. |
| 380 |
|
# MouseLeftUp may pop up modal dialogs which leads to an |
| 381 |
|
# effectively frozen X session because the user can only |
| 382 |
|
# interact with the dialog but the mouse is still grabbed by the |
| 383 |
|
# canvas. |
| 384 |
if self.dragging: |
if self.dragging: |
| 385 |
self.tool.Hide(self.drag_dc) |
if self.HasCapture(): |
| 386 |
self.tool.MouseUp(event) |
self.ReleaseMouse() |
| 387 |
self.drag_dc = None |
try: |
| 388 |
self.dragging = 0 |
self.tool.Hide(self.drag_dc) |
| 389 |
|
finally: |
| 390 |
|
self.drag_dc = None |
| 391 |
|
self.dragging = 0 |
| 392 |
|
self.MouseLeftUp(event) |
| 393 |
|
|
| 394 |
def OnMotion(self, event): |
def OnMotion(self, event): |
| 395 |
if self.dragging: |
if self.dragging: |
| 396 |
self.tool.Hide(self.drag_dc) |
self.tool.Hide(self.drag_dc) |
|
self.tool.MouseMove(event) |
|
|
self.tool.Show(self.drag_dc) |
|
| 397 |
|
|
| 398 |
def OnIdle(self, event): |
self.MouseMove(event) |
|
if self.redraw_on_idle: |
|
|
self.do_redraw() |
|
|
self.redraw_on_idle = 0 |
|
| 399 |
|
|
| 400 |
def shape_selected(self, layer, shape): |
if self.dragging: |
| 401 |
self.redraw() |
self.tool.Show(self.drag_dc) |
|
|
|
|
def find_shape_at(self, px, py, select_labels = 0, selected_layer = 1): |
|
|
"""Determine the shape at point px, py in window coords |
|
| 402 |
|
|
| 403 |
Return the shape and the corresponding layer as a tuple (layer, |
def OnLeaveWindow(self, event): |
| 404 |
shape). |
self.set_current_position(None) |
| 405 |
|
|
| 406 |
If the optional parameter select_labels is true (default false) |
def OnSize(self, event): |
| 407 |
search through the labels. If a label is found return it's index |
# the window's size has changed. We have to get a new bitmap. If |
| 408 |
as the shape and None as the layer. |
# we want to be clever we could try to get by without throwing |
| 409 |
|
# everything away. E.g. when the window gets smaller, we could |
| 410 |
|
# either keep the bitmap or create the new one from the old one. |
| 411 |
|
# Even when the window becomes larger some parts of the bitmap |
| 412 |
|
# could be reused. |
| 413 |
|
self.full_redraw() |
| 414 |
|
|
| 415 |
If the optional parameter selected_layer is true (default), only |
def shape_selected(self, layer, shape): |
| 416 |
search in the currently selected layer. |
"""Receiver for the SHAPES_SELECTED messages. Redraw the map.""" |
| 417 |
|
# The selection object takes care that it only issues |
| 418 |
|
# SHAPES_SELECTED messages when the set of selected shapes has |
| 419 |
|
# actually changed, so we can do a full redraw of the |
| 420 |
|
# selection_bitmap unconditionally. |
| 421 |
|
ViewPort.shape_selected(self, layer, shape) |
| 422 |
|
self.redraw_selection() |
| 423 |
|
|
| 424 |
|
def GetTextExtent(self, text): |
| 425 |
|
dc = wx.ClientDC(self) |
| 426 |
|
font = wx.Font(10, wx.SWISS, wx.NORMAL, wx.NORMAL) |
| 427 |
|
dc.SetFont(font) |
| 428 |
|
return dc.GetTextExtent(text.decode('iso-8859-1')) |
| 429 |
|
|
| 430 |
|
def LabelShapeAt(self, x, y, text=None): |
| 431 |
|
"""Add or remove a label at window position x, y. |
| 432 |
|
|
| 433 |
|
If there's a label at the given position, remove it. Otherwise |
| 434 |
|
determine the shape at the position, run the label dialog and |
| 435 |
|
unless the user cancels the dialog, add a label. |
| 436 |
""" |
""" |
|
map_proj = self.map.projection |
|
|
if map_proj is not None: |
|
|
forward = map_proj.Forward |
|
|
else: |
|
|
forward = None |
|
|
|
|
|
scale = self.scale |
|
|
offx, offy = self.offset |
|
|
|
|
|
if select_labels: |
|
|
labels = self.map.LabelLayer().Labels() |
|
|
|
|
|
if labels: |
|
|
dc = wxClientDC(self) |
|
|
font = wxFont(10, wx.wxSWISS, wx.wxNORMAL, wx.wxNORMAL) |
|
|
dc.SetFont(font) |
|
|
for i in range(len(labels)): |
|
|
label = labels[i] |
|
|
x = label.x |
|
|
y = label.y |
|
|
text = label.text |
|
|
if forward: |
|
|
x, y = forward(x, y) |
|
|
x = x * scale + offx |
|
|
y = -y * scale + offy |
|
|
width, height = dc.GetTextExtent(text) |
|
|
if label.halign == ALIGN_LEFT: |
|
|
# nothing to be done |
|
|
pass |
|
|
elif label.halign == ALIGN_RIGHT: |
|
|
x = x - width |
|
|
elif label.halign == ALIGN_CENTER: |
|
|
x = x - width/2 |
|
|
if label.valign == ALIGN_TOP: |
|
|
# nothing to be done |
|
|
pass |
|
|
elif label.valign == ALIGN_BOTTOM: |
|
|
y = y - height |
|
|
elif label.valign == ALIGN_CENTER: |
|
|
y = y - height/2 |
|
|
if x <= px < x + width and y <= py <= y + height: |
|
|
return None, i |
|
|
|
|
|
if selected_layer: |
|
|
layer = self.interactor.SelectedLayer() |
|
|
if layer is not None: |
|
|
layers = [layer] |
|
|
else: |
|
|
# no layer selected. Use an empty list to effectively |
|
|
# ignore all layers. |
|
|
layers = [] |
|
|
else: |
|
|
layers = self.map.Layers() |
|
|
|
|
|
for layer_index in range(len(layers) - 1, -1, -1): |
|
|
layer = layers[layer_index] |
|
|
|
|
|
# search only in visible layers |
|
|
if not layer.Visible(): |
|
|
continue |
|
|
|
|
|
filled = layer.fill is not None |
|
|
stroked = layer.stroke is not None |
|
|
|
|
|
layer_proj = layer.projection |
|
|
if layer_proj is not None: |
|
|
inverse = layer_proj.Inverse |
|
|
else: |
|
|
inverse = None |
|
|
|
|
|
shapetype = layer.ShapeType() |
|
|
|
|
|
select_shape = -1 |
|
|
if shapetype == SHAPETYPE_POLYGON: |
|
|
for i in range(layer.NumShapes()): |
|
|
result = point_in_polygon_shape(layer.shapefile.cobject(), |
|
|
i, |
|
|
filled, stroked, |
|
|
map_proj, layer_proj, |
|
|
scale, -scale, offx, offy, |
|
|
px, py) |
|
|
if result: |
|
|
select_shape = i |
|
|
break |
|
|
elif shapetype == SHAPETYPE_ARC: |
|
|
for i in range(layer.NumShapes()): |
|
|
result = point_in_polygon_shape(layer.shapefile.cobject(), |
|
|
i, 0, 1, |
|
|
map_proj, layer_proj, |
|
|
scale, -scale, offx, offy, |
|
|
px, py) |
|
|
if result < 0: |
|
|
select_shape = i |
|
|
break |
|
|
elif shapetype == SHAPETYPE_POINT: |
|
|
for i in range(layer.NumShapes()): |
|
|
shape = layer.Shape(i) |
|
|
x, y = shape.Points()[0] |
|
|
if inverse: |
|
|
x, y = inverse(x, y) |
|
|
if forward: |
|
|
x, y = forward(x, y) |
|
|
x = x * scale + offx |
|
|
y = -y * scale + offy |
|
|
if hypot(px - x, py - y) < 5: |
|
|
select_shape = i |
|
|
break |
|
|
|
|
|
if select_shape >= 0: |
|
|
return layer, select_shape |
|
|
return None, None |
|
|
|
|
|
def SelectShapeAt(self, x, y): |
|
|
layer, shape = self.find_shape_at(x, y) |
|
|
# If layer is None, then shape will also be None. We don't want |
|
|
# to deselect the currently selected layer, so we simply select |
|
|
# the already selected layer again. |
|
|
if layer is None: |
|
|
layer = self.interactor.SelectedLayer() |
|
|
self.interactor.SelectLayerAndShape(layer, shape) |
|
|
|
|
|
def LabelShapeAt(self, x, y): |
|
|
ox = x; oy = y |
|
|
label_layer = self.map.LabelLayer() |
|
| 437 |
layer, shape_index = self.find_shape_at(x, y, select_labels = 1) |
layer, shape_index = self.find_shape_at(x, y, select_labels = 1) |
| 438 |
if layer is None and shape_index is not None: |
if layer is None and shape_index is not None: |
| 439 |
# a label was selected |
ViewPort.LabelShapeAt(self, x, y) |
|
label_layer.RemoveLabel(shape_index) |
|
| 440 |
elif layer is not None: |
elif layer is not None: |
| 441 |
text = labeldialog.run_label_dialog(self, layer.table, shape_index) |
text = labeldialog.run_label_dialog(self, |
| 442 |
if text: |
layer.ShapeStore().Table(), |
| 443 |
proj = self.map.projection |
shape_index) |
| 444 |
if proj is not None: |
ViewPort.LabelShapeAt(self, x, y, text) |
| 445 |
map_proj = proj |
|
|
else: |
|
|
map_proj = None |
|
|
proj = layer.projection |
|
|
if proj is not None: |
|
|
layer_proj = proj |
|
|
else: |
|
|
layer_proj = None |
|
| 446 |
|
|
|
shapetype = layer.ShapeType() |
|
|
if shapetype == SHAPETYPE_POLYGON: |
|
|
x, y = shape_centroid(layer.shapefile.cobject(), |
|
|
shape_index, |
|
|
map_proj, layer_proj, 1, 1, 0, 0) |
|
|
if map_proj is not None: |
|
|
x, y = map_proj.Inverse(x, y) |
|
|
else: |
|
|
shape = layer.Shape(shape_index) |
|
|
if shapetype == SHAPETYPE_POINT: |
|
|
x, y = shape.Points()[0] |
|
|
else: |
|
|
# assume SHAPETYPE_ARC |
|
|
points = shape.Points() |
|
|
x, y = points[len(points) / 2] |
|
|
if layer_proj is not None: |
|
|
x, y = layer_proj.Inverse(x, y) |
|
|
if shapetype == SHAPETYPE_POINT: |
|
|
halign = ALIGN_LEFT |
|
|
valign = ALIGN_CENTER |
|
|
elif shapetype == SHAPETYPE_POLYGON: |
|
|
halign = ALIGN_CENTER |
|
|
valign = ALIGN_CENTER |
|
|
elif shapetype == SHAPETYPE_ARC: |
|
|
halign = ALIGN_LEFT |
|
|
valign = ALIGN_CENTER |
|
|
label_layer.AddLabel(x, y, text, |
|
|
halign = halign, valign = valign) |
|
Parent Directory
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Revision Log
| 
Patch