/usr/share/pyshared/Eikazo/Curve.py is in eikazo 0.5.2-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (c) Abel Deuring 2006 <adeuring@gmx.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
widget to display and edit gamma curves etc
"""
import gtk
RADIUS = 3 # radius of the circles showing the control points
SNAP = 10
class Curve(gtk.DrawingArea):
""" FIXME:
- linear interpolation, between control points
- "special" options: mirror horizontally, mirror vertically
- extension: allow also a gamma expression like a ** b (regular
gamma stuff), and a freely definable Python expression
- load curve from file??
"""
def __init__(self, xmin, xmax, ymin, ymax, data=None):
gtk.DrawingArea.__init__(self)
self.xmin = xmin
self.xmax = xmax
self.ymin = ymin
self.ymax = ymax
self.snapped = False
if data:
self.data = data
else:
self.data = [(xmin, ymin), (xmax, ymax)]
#self.cursor1 = gtk.gdk.Cursor(gtk.gdk.CROSSHAIR)
self.cursor1 = gtk.gdk.Cursor(gtk.gdk.TCROSS)
self.cursor2 = gtk.gdk.Cursor(gtk.gdk.FLEUR)
self.set_size_request(200,200)
self.add_events(gtk.gdk.POINTER_MOTION_MASK |
gtk.gdk.BUTTON_PRESS_MASK |
gtk.gdk.BUTTON_RELEASE_MASK)
self.connect("expose-event", self.expose)
self.connect("motion_notify_event", self.cb_motion)
self.connect("button-press-event", self.cb_bpressed)
self.connect("button-release-event", self.cb_breleased)
self.connect("realize", self.cb_realize)
def cb_realize(self, widget):
dr = self.window
cm = dr.get_colormap()
self.colors = {}
self.colors['black'] = cm.alloc_color(0, 0, 0)
self.colors['white'] = cm.alloc_color(65535, 65535, 65535)
self.colors['grey'] = cm.alloc_color(32768, 32768, 32768)
self.colors['red'] = cm.alloc_color(65535, 0, 0)
self.gc = gtk.gdk.GC(self.window, # drawable
self.colors['black'], # foreground color
self.colors['white'], # backgorund color
None, # font
gtk.gdk.COPY, # function
gtk.gdk.SOLID, # fill style
None, # tile pixmap
None, # stipple pixmap
None, # clip_mask pixmap
gtk.gdk.CLIP_BY_CHILDREN, # subwindow mode
0, # ts_x_origin
0, # ts_y_origin
0, # clip_x_origin
0, # clip_y_origin
True, # graphics_exposures
1, # line width
gtk.gdk.LINE_SOLID, # line style
gtk.gdk.CAP_ROUND, # cap_style
gtk.gdk.JOIN_ROUND) # join_style
self.gc.set_function(gtk.gdk.COPY)
def expose(self, area, event):
dr = self.window
cm = dr.get_colormap()
gc = self.gc
gc.set_foreground(self.colors['white'])
gc.set_background(self.colors['white'])
alloc = self.get_allocation()
self.width, self.height = alloc.width, alloc.height
# dr.set_backgorund does not seem to have any effect. So
# draw a rectangle...
dr.draw_rectangle(gc, True, 0, 0, alloc.width, alloc.height)
gc.set_foreground(self.colors['red'])
xscale = float(alloc.width) / (self.xmax - self.xmin)
yscale = float(alloc.height) / (self.ymax - self.ymin)
self.xscale_inv = 1.0 / xscale
self.yscale_inv = 1.0 / yscale
if self.data:
start = self.data[0]
x1 = int((start[0] - self.xmin) * xscale + 0.5)
y1 = int(alloc.height - (start[1] - self.ymin) * yscale + 0.5)
dr.draw_arc(gc, False, x1-RADIUS, y1-RADIUS, RADIUS*2, RADIUS*2, 0, 360*64)
#dr.draw_rectangle(gc, False, x1-RADIUS, y1-RADIUS, RADIUS*2, RADIUS*2)
for end in self.data[1:]:
x2 = int((end[0] - self.xmin) * xscale)
y2 = int(alloc.height - (end[1] - self.ymin) * yscale)
print "line", x1, y1, x2, y2, start, end
dr.draw_line(gc, x1, y1, x2, y2)
dr.draw_arc(gc, False, x2-RADIUS, y2-RADIUS, RADIUS*2, RADIUS*2, 0, 360*64)
#dr.draw_rectangle(gc, False, x2-RADIUS, y2-RADIUS, RADIUS*2, RADIUS*2)
x1 = x2
y1 = y2
start = end
def cb_motion(self, area, event):
print "xxx motion", event.x, event.y, event.state
x1 = (event.x - SNAP) * self.xscale_inv + self.xmin
x2 = (event.x + SNAP) * self.xscale_inv + self.xmin
y1 = (self.height - event.y - SNAP) * self.yscale_inv + self.ymin
y2 = (self.height - event.y + SNAP) * self.yscale_inv + self.ymin
dr = self.window
self.snapped = False
if not self.snapped:
for i in xrange(len(self.data)):
x,y = self.data[i]
if x1 <= x <= x2 and y1 <= y <= y2:
self.snapped = True
self.sindex = i
dr.set_cursor(self.cursor2)
break
if not self.snapped:
dr.set_cursor(self.cursor1)
elif event.state & gtk.gdk.BUTTON1_MASK:
if self.sindex not in (0, len(self.data)-1):
x = event.x * self.xscale_inv + self.xmin
if not (self.data[self.sindex-1][0] < x < self.data[self.sindex+1][0]):
x = self.data[self.sindex][0]
else:
x = self.data[self.sindex][0]
y = (self.height - event.y) * self.yscale_inv + self.ymin
self.data[self.sindex] = (x,y)
self.queue_draw()
def cb_bpressed(self, area, event):
print "xxx bpressed", event.button, event.x, event.y
x = event.x * self.xscale_inv + self.xmin
y = (self.height - event.y) * self.yscale_inv + self.ymin
if event.button == 1:
if self.snapped:
# drag a point
self.data[self.sindex] = (x,y)
else:
for i in xrange(len(self.data)-1):
if self.data[i][0] < x < self.data[i+1][0]:
self.data.insert(i+1, (x,y))
self.snapped = True
self.sindex = i+1
break
self.queue_draw()
elif event.button == 3:
if self.snapped and self.sindex not in (0, len(self.data)-1):
self.data.pop(self.sindex)
self.snapped = False
self.window.set_cursor(self.cursor1)
self.queue_draw()
def cb_breleased(self, area, event):
print "xxx breleased", event, event.button, event.x, event.y
if __name__ == '__main__':
w = gtk.Window(gtk.WINDOW_TOPLEVEL)
c = Curve(0, 100, 0, 100, [(0,0), (50,50), (100,100)])
w.add(c)
c.show()
w.show()
gtk.main()
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