| 19 |
def DrawScalebar(self, scale, dc): |
def DrawScalebar(self, scale, dc): |
| 20 |
"""Draw a scalebar on a given DC""" |
"""Draw a scalebar on a given DC""" |
| 21 |
|
|
| 22 |
# Get the dimension |
# Only draw a legend if the corresponding map has a layer |
| 23 |
width, height = dc.GetSizeTuple() |
if self.map is not None and len(self.map.layers) > 0: |
| 24 |
l1width, l1height = dc.GetTextExtent("%d"%0) |
|
| 25 |
|
# If no projection is specified, the scale information _might_ |
| 26 |
# Make a first guess for the length (to get the size we have to reserve |
# be reasonable. So gray out the scalebar in these cases. |
| 27 |
# for the labels) |
if self.map.projection is None: |
| 28 |
length, unit = self.__deriveLength(width, scale) |
BlackPen = wxGREY_PEN |
| 29 |
l2width, l2height = dc.GetTextExtent("%d %s"%(length,unit)) |
BlackBrush = wxGREY_BRUSH |
| 30 |
width = width - 4.0 - l1width/2.0 -l2width/2.0 |
BlackText = wxColor(127,127,127) |
| 31 |
|
else: |
| 32 |
|
BlackPen = wxBLACK_PEN |
| 33 |
|
BlackBrush = wxBLACK_BRUSH |
| 34 |
|
BlackText = wxBLACK |
| 35 |
|
|
| 36 |
|
# Get the dimension |
| 37 |
|
width, height = dc.GetSizeTuple() |
| 38 |
|
l1width, l1height = dc.GetTextExtent("%d"%0) |
| 39 |
|
|
| 40 |
|
# Make a first guess for the length (to get the size we have |
| 41 |
|
# to reserve for the labels) |
| 42 |
|
length, unit = self.deriveLength(width, scale) |
| 43 |
|
l2width, l2height = dc.GetTextExtent("%d %s"%(length,unit)) |
| 44 |
|
width = width - 4.0 - l1width/2.0 -l2width/2.0 |
| 45 |
|
|
| 46 |
# Having precised the width now the final length can be calculated |
# Having precised the width now the final length can be calculated |
| 47 |
length, unit = self.__deriveLength(width, scale) |
length, unit = self.deriveLength(width, scale) |
| 48 |
|
length = self.roundInterval(length) |
| 49 |
# We draw 2 rectangles with half the width |
|
| 50 |
width = int(width/2) |
# We draw 2 rectangles with half the width |
| 51 |
|
if unit == 'km': |
| 52 |
brush = wxBrush(wxWHITE, wxSOLID) |
width = int(length*1000.0*scale/2) |
| 53 |
dc.SetBrush(brush) |
else: |
| 54 |
dc.DrawRectangle(4,2,width,8) |
width = int(length*scale/2) |
| 55 |
|
|
| 56 |
brush = wxBrush(wxBLACK, wxSOLID) |
dc.SetPen(BlackPen) |
| 57 |
dc.SetBrush(brush) |
|
| 58 |
dc.DrawRectangle(width+4,2,width,8) |
brush = wxBrush(wxWHITE, wxSOLID) |
| 59 |
|
dc.SetBrush(brush) |
| 60 |
|
dc.DrawRectangle(4,2,width,8) |
| 61 |
|
|
| 62 |
|
dc.SetBrush(BlackBrush) |
| 63 |
|
dc.DrawRectangle(width+4,2,width,8) |
| 64 |
|
|
| 65 |
dc.DrawText("%d"%0, 4 - l1width/2, 12) |
dc.SetTextForeground(BlackText) |
| 66 |
|
dc.DrawText("%d"%0, 4 - l1width/2, 12) |
| 67 |
|
|
| 68 |
l2width, l2height = dc.GetTextExtent("%d %s"%(length, unit)) |
l2width, l2height = dc.GetTextExtent("%d %s"%(length, unit)) |
| 69 |
dc.DrawText("%d %s"%(length, unit), 2*width+4 - l2width/2, 12) |
dc.DrawText("%d %s"%(length, unit), 2*width+4 - l2width/2, 12) |
| 70 |
|
|
| 71 |
def __deriveLength(self, width, scale): |
def deriveLength(self, width, scale): |
| 72 |
|
|
| 73 |
length = width / scale |
length = width / scale |
| 74 |
|
|
| 80 |
unit = 'm' |
unit = 'm' |
| 81 |
|
|
| 82 |
return length, unit |
return length, unit |
| 83 |
|
|
| 84 |
|
def roundInterval(self, d): |
| 85 |
|
if d<.001: |
| 86 |
|
return int(d*10000)/10000.0 |
| 87 |
|
if d<.01: |
| 88 |
|
return int(d*1000)/1000.0 |
| 89 |
|
if d<.1: |
| 90 |
|
return int(d*100)/100.0 |
| 91 |
|
if d<1: |
| 92 |
|
return int(d*10)/10.0 |
| 93 |
|
if d<10: |
| 94 |
|
return int(d) |
| 95 |
|
if d<100: |
| 96 |
|
return int(d/10) * 10 |
| 97 |
|
if d<1000: |
| 98 |
|
return int(d/100) * 100 |
| 99 |
|
if d<10000: |
| 100 |
|
return int(d/1000) * 1000 |
| 101 |
|
if d<100000: |
| 102 |
|
return int(d/10000) * 10000 |
| 103 |
|
|
| 104 |
|
return -1 |
| 105 |
|
|
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