def __init__(self,size = (640,480),type_ = Display.DEFAULT,title = "SimpleCV",fit = Display.SCROLL):
DisplayBase.__init__(self,size,type_,title,fit)
parentConnection,childConnnection = Pipe()
self.type_ = type_
self.fit = fit
self.imageWidgetSize = None
#Initializing a Worker, A process to handle one display
#create and start the worker process
self.worker = GtkWorker(childConnnection,size,type_,title,fit)
self.connection = parentConnection
self.worker.start()
#whether or not the chil process is alive
self.workerAlive= True
self.imageWidgetSize = self.getImageWidgetSize()
class GtkDisplay(Display.DisplayBase):
"""
A Display for SimpleCV using Gtk back-end. Each GtkDisplay spawns a GtkWorker,
which is a seperate process do display images passed to it. GtkDisplay itself
doesn't do gtk calls. It send messages to the Worker to tell it what to do
Images may have non-empty Drawing layers. Each layer may have shapes.
These are communicated to the GtkWorker via the send_* calls
eg. A Line is handled by the send_Line call.
"""
def name(self):
__doc__ = DisplayBase.name.__doc__
return "GtkDisplay"
def __init__(self,size = (640,480),type_ = Display.DEFAULT,title = "SimpleCV",fit = Display.SCROLL):
DisplayBase.__init__(self,size,type_,title,fit)
parentConnection,childConnnection = Pipe()
self.type_ = type_
self.fit = fit
self.imageWidgetSize = None
#Initializing a Worker, A process to handle one display
#create and start the worker process
self.worker = GtkWorker(childConnnection,size,type_,title,fit)
self.connection = parentConnection
self.worker.start()
#whether or not the chil process is alive
self.workerAlive= True
self.imageWidgetSize = self.getImageWidgetSize()
def close(self):
__doc__ = DisplayBase.close.__doc__
Display.DisplayBase.close(self)
#terminate the worker process
self.worker.terminate()
def _checkIfWorkerDead(self):
"""
**SUMMARY**
Checks if the Worker process has requested to be killed. Sets the
workerAlive flag
"""
if(self.connection.poll()):
if(self.connection.recv() == 'Kill Me' ):
# " Hasta La Vista , Baby "
# http://www.youtube.com/watch?v=DMGh82QHVcQ
self.close()
self.workerAlive = False
self.done = True
def getImageWidgetSize(self):
"""
**SUMMARY**
Get the size allocated to the image widget in the Display
**RETURNS**
A (width,height) tuple
"""
self._checkIfWorkerDead()
if(self.workerAlive):
dic = {}
dic['function'] = 'getImageWidgetSize'
self.connection.send(dic)
return self.connection.recv()
else:
raise DisplayNotFoundException(self)
def showImage(self,img):
"""
**SUMMARY**
Show the image.
**PARAMETERS**
* *img = a SimpleCV Image object to be displayed
**Example**
>>> img = Image('lenna')
>>> d = Display()
>>> d.showImage(img)
"""
self._checkIfWorkerDead()
if(self.workerAlive):
# Converts the image to a string and passes it in a dict along
# with other necessary info. This is more efficient than sending
# the whole image
dic = {}
dic['function'] = 'showImage'
try:
dic['data'] = img.toRGB().getNumpy()
except:
dic['data'] = img.getNumpy()
dic['depth'] = img.depth
dic['width'] = img.width
dic['height'] = img.height
dic['layers'] = img.layers()
self.connection.send(dic)
else:
pass
#TODO , maybe Diplsy a warning here
@property
def mouseX(self):
"""
**SUMMARY**
Returns the current x coordinate of the mouse pointer on the image.
**NOTE**
This position is with respect to the actual size of the image.
For example, if the image is of size 512x512, and the display is initilized with
fit = RESIZE, then the image can be shown to be at a higher or a lower size.
But the x coordinate returned by the function are scaled to match the size
of the actual image. Use this function for any image manipulation. Use mousePositionRaw()
to get the position of the mouse wrt the display
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'mouseX'
self.connection.send(dic)
return self.connection.recv()
@property
def mouseY(self):
"""
**SUMMARY**
Returns the current y coordinate of the mouse pointer on the image.
**NOTE**
This position is with respect to the actual size of the image.
For example, if the image is of size 512x512, and the display is initilized with
fit = RESIZE, then the image can be shown to be at a higher or a lower size.
But the y coordinate returned by the function are scaled to match the size
of the actual image. Use this function for any image manipulation. Use mousePositionRaw()
to get the position of the mouse wrt the display
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'mouseY'
self.connection.send(dic)
return self.connection.recv()
def leftDown(self):
"""
**SUMMARY**
Returns the position where the left mouse button was pressed on the image.
**NOTE**
This position is with respect to the actual size of the image.
For example, if the image is of size 512x512, and the display is initilized with
fit = RESIZE, then the image can be shown to be at a higher or a lower size.
But the position returned by the function are scaled to match the size
of the actual image. Use this function for any image manipulation. Use mousePositionRaw()
to get the position of the mouse wrt the display
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'leftDown'
self.connection.send(dic)
return self.connection.recv()[0]
def rightDown(self):
"""
**SUMMARY**
Returns the position where the right mouse button was pressed on the image.
**NOTE**
This position is with respect to the actual size of the image.
For example, if the image is of size 512x512, and the display is initilized with
fit = RESIZE, then the image can be shown to be at a higher or a lower size.
But the position returned by the function are scaled to match the size
of the actual image. Use this function for any image manipulation. Use mousePositionRaw()
to get the position of the mouse wrt the display
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'rightDown'
self.connection.send(dic)
return self.connection.recv()[0]
def leftUp(self):
"""
**SUMMARY**
Returns the position where the left mouse button was released on the image.
**NOTE**
This position is with respect to the actual size of the image.
For example, if the image is of size 512x512, and the display is initilized with
fit = RESIZE, then the image can be shown to be at a higher or a lower size.
But the position returned by the function are scaled to match the size
of the actual image. Use this function for any image manipulation. Use mousePositionRaw()
to get the position of the mouse wrt the display
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'leftUp'
self.connection.send(dic)
return self.connection.recv()[0]
def rightUp(self):
"""
**SUMMARY**
Returns the position where the right mouse button was released on the image.
**NOTE**
This position is with respect to the actual size of the image.
For example, if the image is of size 512x512, and the display is initilized with
fit = RESIZE, then the image can be shown to be at a higher or a lower size.
But the position returned by the function are scaled to match the size
of the actual image. Use this function for any image manipulation. Use mousePositionRaw()
to get the position of the mouse wrt the display
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'rightUp'
self.connection.send(dic)
return self.connection.recv()[0]
def middleDown(self):
"""
**SUMMARY**
Returns the position where the middle mouse button was pressed on the image.
**NOTE**
This position is with respect to the actual size of the image.
For example, if the image is of size 512x512, and the display is initilized with
fit = RESIZE, then the image can be shown to be at a higher or a lower size.
But the position returned by the function are scaled to match the size
of the actual image. Use this function for any image manipulation. Use mousePositionRaw()
to get the position of the mouse wrt the display
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'middleDown'
self.connection.send(dic)
return self.connection.recv()[0]
def middleUp(self):
"""
**SUMMARY**
Returns the position where the middle mouse button was released on the image.
**NOTE**
This position is with respect to the actual size of the image.
For example, if the image is of size 512x512, and the display is initilized with
fit = RESIZE, then the image can be shown to be at a higher or a lower size.
But the position returned by the function are scaled to match the size
of the actual image. Use this function for any image manipulation. Use mousePositionRaw()
to get the position of the mouse wrt the display
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'middleUp'
self.connection.send(dic)
return self.connection.recv()[0]
def mouseScrollPosition(self):
"""
**SUMMARY**
Returns the position where the mouse was scrolled.
**NOTE**
This position is with respect to the actual size of the image.
For example, if the image is of size 512x512, and the display is initilized with
fit = RESIZE, then the image can be shown to be at a higher or a lower size.
But the position returned by the function are scaled to match the size
of the actual image. Use this function for any image manipulation. Use mousePositionRaw()
to get the position of the mouse wrt the display
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'mouseScrollPosition'
self.connection.send(dic)
return self.connection.recv()[0]
def mouseScrollType(self):
"""
**SUMMARY**
Returns the direction in which the mouse was scrolled. either 'up' or 'down' .
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'mouseScrollType'
self.connection.send(dic)
return self.connection.recv()[0]
@property
def mousePosition(self):
"""
**SUMMARY**
Returns the position of the mouse pointer on the image.
**NOTE**
This position is with respect to the actual size of the image.
For example, if the image is of size 512x512, and the display is initilized with
fit = RESIZE, then the image can be shown to be at a higher or a lower size.
But the position returned by the function are scaled to match the size
of the actual image. Use this function for any image manipulation. Use mousePositionRaw()
to get the position of the mouse wrt the display
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'mousePosition'
self.connection.send(dic)
return self.connection.recv()
@property
def mousePositionRaw(self):
"""
**SUMMARY**
Returns the position of the mouse pointer on the whole display.
"""
if(self.workerAlive):
dic = {}
dic['function'] = 'mousePositionRaw'
self.connection.send(dic)
return self.connection.recv()
