class TextWindow:
"""
Encapsulates the drawing of a single line of text, with optional
rounded corners and an optional "override width", which overides the
default width (margins + text width).
"""
def __init__(self, height, position):
"""
Creates the underlying TransparentWindow and Cairo context.
Position and height should be in pixels.
"""
# Use the maximum width that we can, i.e., the desktop width.
width, _ = graphics.getDesktopSize()
left, top = graphics.getDesktopOffset()
xPos, yPos = position
self.__window = TransparentWindow(xPos + left, yPos + top, width,
height)
self.__context = self.__window.makeCairoContext()
def getHeight(self):
"""
LONGTERM TODO: Document this.
"""
return self.__window.getHeight()
def draw(self, document):
"""
Draws the text described by document.
An updating call; at the end of this method, the displayed
window should reflect the drawn content.
"""
width = document.ragWidth + layout.L_MARGIN + layout.R_MARGIN
height = self.__window.getMaxHeight()
cr = self.__context
# Clear the areas where the corners of the rounded rectangle will be.
cr.save()
cr.set_source_rgba(0, 0, 0, 0)
cr.set_operator(cairo.OPERATOR_SOURCE)
cr.rectangle(width - rounded_rect.CORNER_RADIUS,
height - rounded_rect.CORNER_RADIUS,
rounded_rect.CORNER_RADIUS, rounded_rect.CORNER_RADIUS)
cr.rectangle(width - rounded_rect.CORNER_RADIUS, 0,
rounded_rect.CORNER_RADIUS, rounded_rect.CORNER_RADIUS)
cr.paint()
# Draw the background rounded rectangle.
corners = []
if document.roundUpperRight:
corners.append(rounded_rect.UPPER_RIGHT)
if document.roundLowerRight:
corners.append(rounded_rect.LOWER_RIGHT)
cr.set_source_rgba(*document.background)
rounded_rect.drawRoundedRect(context=cr,
rect=(0, 0, width, height),
softenedCorners=corners)
cr.fill_preserve()
cr.restore()
# Next, draw the text.
document.draw(layout.L_MARGIN, document.shrinkOffset, self.__context)
width = min(self.__window.getMaxWidth(), width)
height = min(self.__window.getMaxHeight(), height)
self.__window.setSize(width, height)
self.__window.update()
def hide(self):
"""
Clears the window's surface (making it disappear).
"""
# LONGTERM TODO: Clearing the surface, i.e., painting it
# clear, seems like a potential performance bottleneck.
self.__window.setSize(1, 1)
# Frankly, I don't know why this works, but after this
# function, the resulting window is totally clear. I find it
# odd, since the alpha value is not being set. It is a
# wierdness of Cairo. -- Andrew
self.__context.set_operator(cairo.OPERATOR_CLEAR)
self.__context.paint()
self.__context.set_operator(cairo.OPERATOR_OVER)
self.__window.update()
class TextWindow:
"""
Encapsulates the drawing of a single line of text, with optional
rounded corners and an optional "override width", which overides the
default width (margins + text width).
"""
def __init__( self, height, position ):
"""
Creates the underlying TransparentWindow and Cairo context.
Position and height should be in pixels.
"""
# Use the maximum width that we can, i.e., the desktop width.
width, _ = graphics.getDesktopSize()
left, top = graphics.getDesktopOffset()
xPos, yPos = position
self.__window = TransparentWindow(xPos + left, yPos, width, height )
self.__context = self.__window.makeCairoContext()
def getHeight( self ):
"""
LONGTERM TODO: Document this.
"""
return self.__window.getHeight()
def draw( self, document ):
"""
Draws the text described by document.
An updating call; at the end of this method, the displayed
window should reflect the drawn content.
"""
width = document.ragWidth + layout.L_MARGIN + layout.R_MARGIN
height = self.__window.getMaxHeight()
cr = self.__context
# Clear the areas where the corners of the rounded rectangle will be.
cr.save()
cr.set_source_rgba( 0, 0, 0, 0 )
cr.set_operator( cairo.OPERATOR_SOURCE )
cr.rectangle( width - rounded_rect.CORNER_RADIUS,
height - rounded_rect.CORNER_RADIUS,
rounded_rect.CORNER_RADIUS,
rounded_rect.CORNER_RADIUS )
cr.rectangle( width - rounded_rect.CORNER_RADIUS,
0,
rounded_rect.CORNER_RADIUS,
rounded_rect.CORNER_RADIUS )
cr.paint()
# Draw the background rounded rectangle.
corners = []
if document.roundUpperRight:
corners.append( rounded_rect.UPPER_RIGHT )
if document.roundLowerRight:
corners.append( rounded_rect.LOWER_RIGHT )
cr.set_source_rgba( *document.background )
rounded_rect.drawRoundedRect( context = cr,
rect = ( 0, 0, width, height ),
softenedCorners = corners )
cr.fill_preserve()
cr.restore()
# Next, draw the text.
document.draw( layout.L_MARGIN,
document.shrinkOffset,
self.__context )
width = min( self.__window.getMaxWidth(), width )
height = min( self.__window.getMaxHeight(), height )
self.__window.setSize( width, height )
self.__window.update()
def hide( self ):
"""
Clears the window's surface (making it disappear).
"""
# LONGTERM TODO: Clearing the surface, i.e., painting it
# clear, seems like a potential performance bottleneck.
self.__window.setSize( 1, 1 )
# Frankly, I don't know why this works, but after this
# function, the resulting window is totally clear. I find it
# odd, since the alpha value is not being set. It is a
# wierdness of Cairo. -- Andrew
self.__context.set_operator (cairo.OPERATOR_CLEAR)
self.__context.paint ()
self.__context.set_operator (cairo.OPERATOR_OVER)
self.__window.update()
