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|
#!/usr/bin/python
import gtk
from random import randrange
# Dessiner une ligne sur la zone de dessin
def expose(widget, data):
global x1, x2, y1, y2, couleur
cr = data.window.cairo_create()
cr.set_source_rgb(couleur[0], couleur[1], couleur[2])
cr.set_line_width(2)
#w = data.allocation.width
#h = data.allocation.height
#print w, h
cr.move_to(x1, y1)
cr.line_to(x2, y2)
cr.stroke()
y2, y1 = y2+10, y1-10
# Choisir une couleur au hasard
def color(widget):
'test'
global couleur
i = 0
while i<3:
couleur[i] = randrange(0,255)/255.0
i += 1
############ Gestion Pixmap
# Create a new backing pixmap of the appropriate size
def configure_event(widget, event):
global pixmap
x, y, width, height = widget.get_allocation()
pixmap = gtk.gdk.Pixmap(widget.window, width, height)
pixmap.draw_rectangle(widget.get_style().white_gc,
True, 0, 0, width, height)
return True
# Redraw the screen from the backing pixmap
def expose_event(widget, event):
x , y, width, height = event.area
widget.window.draw_drawable(widget.get_style().fg_gc[gtk.STATE_NORMAL],
pixmap, x, y, x, y, width, height)
return False
def button_press_event(widget, event):
if event.button == 1 and pixmap != None:
expose(widget, event.x, event.y)
return True
def motion_notify_event(widget, event):
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x = event.x
y = event.y
state = event.state
if state & gtk.gdk.BUTTON1_MASK and pixmap != None:
expose(widget, x, y)
return True
#################
# Initialisation des variables
couleur = [0, 0, 0]
x1, y1, x2, y2 = 30, 30, 570, 570
# Backing pixmap for drawing area
pixmap = None
# Cr?ation de l'interface
PyApp = gtk.Window()
PyApp.set_title("Formes")
PyApp.set_size_request(800, 600)
PyApp.set_border_width(20)
PyApp.set_position(gtk.WIN_POS_CENTER)
PyApp.connect("destroy", gtk.main_quit)
darea = gtk.DrawingArea()
###################### Copier-coller pour gestion de l'affichage
# Signals used to handle backing pixmap
darea.connect("expose_event", expose_event)
darea.connect("configure_event", configure_event)
# Event signals
darea.connect("motion_notify_event", motion_notify_event)
darea.connect("button_press_event", button_press_event)
darea.set_events(gtk.gdk.EXPOSURE_MASK
| gtk.gdk.LEAVE_NOTIFY_MASK
| gtk.gdk.BUTTON_PRESS_MASK
| gtk.gdk.POINTER_MOTION_MASK
| gtk.gdk.POINTER_MOTION_HINT_MASK)
##################
# Suite de l'interface
button1 = gtk.Button(label="Tracer une ligne")
button1.set_size_request(130, 35)
button1.connect("clicked", expose, darea)
button2 = gtk.Button(label="Changer de couleur")
button2.set_size_request(130, 35)
button2.connect("clicked", color)
button3 = gtk.Button(label="Quitter")
button3.set_size_request(130, 35)
button3.connect("clicked", gtk.main_quit)
vbox = gtk.VBox(False, 5)
hbox = gtk.HBox(False, 3)
vbox.pack_start(button1, False, True, 3)
vbox.pack_start(button2, False, False, 3)
vbox.pack_end(button3, False, False, 3)
hbox.pack_start(darea, True, True)
hbox.pack_end(vbox, False, False)
PyApp.add(hbox)
PyApp.show_all()
gtk.main() |
