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"""!
@package mapdisp.overlays
@brief Map display overlays - barscale and legend
Classes:
- overlays::OverlayController
- overlays::BarscaleController
- overlays::LegendController
(C) 2006-2013 by the GRASS Development Team
This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.
@author Anna Kratochvilova <kratochanna gmail.com>
"""
class OverlayController(object):
"""!Base class for decorations (barscale, legend) controller."""
def __init__(self, renderer):
self._renderer = renderer
self._overlay = None
self._coords = [0, 0]
self._pdcType = 'image'
self._propwin = None
self._defaultAt = ''
def SetCmd(self, cmd):
hasAt = False
for i in cmd:
if i.startswith("at="):
hasAt = True
break
if not hasAt:
cmd.append(self._defaultAt)
self._cmd = cmd
def GetCmd(self):
return self._cmd
cmd = property(fset = SetCmd, fget = GetCmd)
def SetCoords(self, coords):
self._coords = list(coords)
def GetCoords(self):
return self._coords
coords = property(fset = SetCoords, fget = GetCoords)
def GetPdcType(self):
return self._pdcType
pdcType = property(fget = GetPdcType)
def GetName(self):
return self._name
name = property(fget = GetName)
def GetId(self):
return self._id
id = property(fget = GetId)
def GetPropwin(self):
return self._propwin
def SetPropwin(self, win):
self._propwin = win
propwin = property(fget = GetPropwin, fset = SetPropwin)
def GetLayer(self):
return self._overlay
layer = property(fget = GetLayer)
def IsShown(self):
if self._overlay and self._overlay.IsActive():
return True
return False
def Show(self, show = True):
"""!Activate or deactivate overlay."""
if show:
if not self._overlay:
self._add()
self._overlay.SetActive(True)
self._update()
else:
self.Hide()
def Hide(self):
if self._overlay:
self._overlay.SetActive(False)
def _add(self):
self._overlay = self._renderer.AddOverlay(id = self._id, type = self._name,
command = self.cmd, l_active = False,
l_render = False, l_hidden = True)
# check if successfull
def _update(self):
self._renderer.ChangeOverlay(id = self._id, command = self._cmd,
render = False)
class BarscaleController(OverlayController):
def __init__(self, renderer):
OverlayController.__init__(self, renderer)
self._id = 0
self._name = 'barscale'
self._defaultAt = 'at=0,95'
self._cmd = ['d.barscale', self._defaultAt]
class LegendController(OverlayController):
def __init__(self, renderer):
OverlayController.__init__(self, renderer)
self._id = 1
self._name = 'legend'
# TODO: synchronize with d.legend?
self._defaultAt = 'at=5,50,2,5'
self._cmd = ['d.legend', self._defaultAt]
def ResizeLegend(self, begin, end, screenSize):
"""!Resize legend according to given bbox coordinates."""
w = abs(begin[0] - end[0])
h = abs(begin[1] - end[1])
if begin[0] < end[0]:
x = begin[0]
else:
x = end[0]
if begin[1] < end[1]:
y = begin[1]
else:
y = end[1]
at = [(screenSize[1] - (y + h)) / float(screenSize[1]) * 100,
(screenSize[1] - y) / float(screenSize[1]) * 100,
x / float(screenSize[0]) * 100,
(x + w) / float(screenSize[0]) * 100]
atStr = "at=%d,%d,%d,%d" % (at[0], at[1], at[2], at[3])
for i, subcmd in enumerate(self._cmd):
if subcmd.startswith('at='):
self._cmd[i] = atStr
break
self._coords = [0, 0]
self.Show()
|
