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0.1 - grid of dots

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git-svn-id: http://www.neo1973-germany.de/svn@77 46df4e5c-bc4e-4628-a0fc-830ba316316d
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kriss 2008-07-02 16:02:26 +00:00
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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"""
* 2d_slider.py
* widget to allow for 2D selection of values
*
* (C) 2008 by Kristian Mueller <kristian-m@kristian-m.de>
* All Rights Reserved
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
import os
import gtk
IMAGE_DIRECTORY = os.path.join(os.path.realpath(os.path.curdir), "./")
POINT_IMAGE = os.path.join(IMAGE_DIRECTORY, "point.png")
POINT_INV_IMAGE = os.path.join(IMAGE_DIRECTORY, "point_inv.png")
IMAGE_SIZE_X = 10
IMAGE_SIZE_Y = 10
class slider_2d(gtk.HBox):
"""
Widget to allow for two dimensional selection of values
"""
def __init__(self, x_range = (0, 10), y_range = (0, 10),
bg_color = "#222222", fg_color = "#555566"):
gtk.HBox.__init__(self, False, 0)
self.x_range = x_range
self.y_range = y_range
self.x_resolution = x_range[1] - x_range[0]
self.y_resolution = y_range[1] - y_range[0]
self.bg_color = bg_color
self.fg_color = fg_color
self.x_value = int(x_range[1] - x_range[0] / 2)
self.y_value = int(x_range[1] - x_range[0] / 2)
self.mouse_x_position = -1
self.mouse_y_position = -1
self.clicked = False
self.area = gtk.DrawingArea()
self.area.set_size_request(400, 300)
style = self.area.get_style()
self.gc = style.fg_gc[gtk.STATE_NORMAL]
self.area.set_events(gtk.gdk.POINTER_MOTION_MASK |
gtk.gdk.POINTER_MOTION_HINT_MASK )
self.area.add_events(gtk.gdk.BUTTON_MOTION_MASK | \
gtk.gdk.BUTTON_PRESS_MASK | \
gtk.gdk.BUTTON_RELEASE_MASK)
self.area.connect("expose-event", self.area_expose_cb)
self.area.connect("button-press-event", self.area_click_cb)
self.area.connect("button-release-event", self.area_unclick_cb)
self.area.connect("motion-notify-event", self.area_mousemove_cb)
self.x_value_changed_callback = 0
self.y_value_changed_callback = 0
# define Horizontal and Vertical Rulers
self.hruler = gtk.HRuler()
self.vruler = gtk.VRuler()
self.hruler.set_range(x_range[0], x_range[1], x_range[0], x_range[1])
self.vruler.set_range(y_range[0], y_range[1], y_range[0], y_range[1])
def motion_notify(ruler, event):
return ruler.emit("motion_notify_event", event)
self.area.connect_object("motion_notify_event", motion_notify,
self.hruler)
self.area.connect_object("motion_notify_event", motion_notify,
self.vruler)
def size_allocate_cb(wid, allocation):
x, y, width, height = allocation
lower, upper, position, max_size = self.hruler.get_range()
self.hruler.set_range(lower, self.x_resolution, position, max_size)
lower, upper, position, max_size = self.vruler.get_range()
self.vruler.set_range(lower, self.y_resolution, position, max_size)
self.width = width
self.height = height
self.area.connect('size-allocate', size_allocate_cb)
self.table = gtk.Table(2,2)
self.table.attach(self.hruler, 1, 2, 0, 1, yoptions=0)
self.table.attach(self.vruler, 0, 1, 1, 2, xoptions=0)
self.table.attach(self.area, 1, 2, 1, 2)
self.add(self.table)
def connect(self, event_name, callback):
if event_name == "x_value_changed_event":
self.x_value_changed_callback = callback
elif event_name == "y_value_changed_event":
self.y_value_changed_callback = callback
else:
super(slider_2d, self).connect(event_name, callback)
############################################################################
## callbacks to draw 2D Slider #############################################
############################################################################
def area_expose_cb(self, area, event):
self.redraw()
def area_click_cb(self, area, event):
self.clicked = True
self.put_value_point(area)
def area_unclick_cb(self, area, event):
self.clicked = False
self.put_value_point(area)
def area_mousemove_cb(self, area, event):
pos = area.get_pointer()
x_max = self.width * 1.0 -1
y_max = self.height * 1.0 -1
x_spacing = x_max / self.x_resolution
y_spacing = y_max / self.y_resolution
# get position of point in grid
x = int((pos[0] + x_spacing/2) / x_spacing)
y = int((pos[1] + y_spacing/2) / y_spacing)
if self.mouse_x_position != x or self.mouse_y_position != y:
self.redraw_area(self.mouse_x_position, self.mouse_y_position)
self.mouse_x_position = x
self.mouse_y_position = y
self.show_inv_point(x, y)
if self.clicked:
self.put_value_point(area)
def put_value_point(self, area):
"""
actually setting a new value
"""
pos = area.get_pointer()
x_max = self.width * 1.0 -1
y_max = self.height * 1.0 -1
x_spacing = x_max / self.x_resolution
y_spacing = y_max / self.y_resolution
# get position of point in grid
x = int((pos[0] + x_spacing/2) / x_spacing)
y = int((pos[1] + y_spacing/2) / y_spacing)
if (self.x_value != x or self.y_value != y) \
and x in range(self.x_range[0], self.x_range[1]+1)\
and y in range(self.y_range[0], self.y_range[1]+1):
backup_x = self.x_value
backup_y = self.y_value
self.x_value = x
self.y_value = y
self.redraw_area(backup_x, backup_y)
self.show_point(self.x_value, self.y_value)
# here we call the callbacks!
if backup_x != self.x_value:
self.x_value_changed_callback(self.x_value)
if backup_y != self.y_value:
self.y_value_changed_callback(self.y_value)
############################################################################
## actually writing to our area ############################################
############################################################################
def redraw(self):
"""
writing all elements to drawing area
(clears screen, draws grid, draws value)
"""
# get gc
style = self.area.get_style()
self.gc = style.fg_gc[gtk.STATE_NORMAL]
# clear screen
if self.gc:
fg_backup = self.gc.foreground
self.gc.foreground = self.area.window.get_colormap()\
.alloc_color(self.bg_color)
# 1) clear screen
self.area.window.draw_rectangle(self.gc, True, 0, 0, -1, -1)
self.gc.foreground = fg_backup
backup_fb = self.gc.foreground
try:
self.gc.foreground = self.area.window.get_colormap()\
.alloc_color(self.fg_color)
self.gc.set_line_attributes(1, \
gtk.gdk.LINE_SOLID, gtk.gdk.CAP_ROUND, \
gtk.gdk.CAP_ROUND)
# 2) draw grid
x_max = self.width * 1.0 -1
y_max = self.height * 1.0 -1
x_spacing = x_max / self.x_resolution
y_spacing = y_max / self.y_resolution
for i in range(self.x_resolution+2):
self.area.window.draw_line(self.gc, int(x_spacing * i), 0, int(x_spacing * i), int(y_max))
for i in range(self.y_resolution+2):
self.area.window.draw_line(self.gc, 0, int(y_spacing * i), int(x_max), int(y_spacing * i))
finally:
self.gc.foreground = backup_fb
self.show_point(self.x_value, self.y_value)
def draw_pixmap(self, x, y, img):
"""
loads and draws image to our area
"""
pixmap, mask = gtk.gdk.pixmap_create_from_xpm(self.area.window, \
self.area.window.get_colormap().alloc_color(self.bg_color), img)
self.area.window.draw_drawable(self.gc, pixmap, 0, 0, \
int(x-5), int(y-5), -1, -1)
def show_point(self, x_value, y_value):
"""
shows the value-marker at a specific place
"""
x_max = self.width * 1.0 -1
y_max = self.height * 1.0 -1
x_spacing = x_max / self.x_resolution
y_spacing = y_max / self.y_resolution
self.draw_pixmap(x_spacing * x_value, y_spacing * y_value, POINT_IMAGE)
def show_inv_point(self, x_value, y_value):
"""
shows the inverted value-marker (mouse indicator) at a specific place
"""
x_max = self.width * 1.0 -1
y_max = self.height * 1.0 -1
x_spacing = x_max / self.x_resolution
y_spacing = y_max / self.y_resolution
self.draw_pixmap(x_spacing * int(x_value), y_spacing * int(y_value),\
POINT_INV_IMAGE)
def redraw_area(self, x_value, y_value):
"""
redraws the area of a value marker, without clearing out the whole
screen - to prevent flickering
"""
x_max = self.width * 1.0 -1
y_max = self.height * 1.0 -1
x_spacing = x_max / self.x_resolution
y_spacing = y_max / self.y_resolution
start_x = int((x_spacing * x_value) - (IMAGE_SIZE_X / 2))
start_y = int((y_spacing * y_value) - (IMAGE_SIZE_Y / 2))
fg_backup = self.gc.foreground
self.gc.foreground = self.area.window.get_colormap()\
.alloc_color(self.bg_color)
self.area.window.draw_rectangle(self.gc, True, \
start_x, start_y, IMAGE_SIZE_X, IMAGE_SIZE_Y)
self.gc.foreground = fg_backup
# easyest way for now: redraw all lines
backup_fb = self.gc.foreground
try:
self.gc.foreground = self.area.window.get_colormap()\
.alloc_color(self.fg_color)
self.gc.set_line_attributes(1, \
gtk.gdk.LINE_SOLID, gtk.gdk.CAP_ROUND, \
gtk.gdk.CAP_ROUND)
# 2) draw grid
x_max = self.width * 1.0 -1
y_max = self.height * 1.0 -1
x_spacing = x_max / self.x_resolution
y_spacing = y_max / self.y_resolution
for i in range(self.x_resolution+2):
self.area.window.draw_line(self.gc, int(x_spacing * i), 0, int(x_spacing * i), int(y_max))
for i in range(self.y_resolution+2):
self.area.window.draw_line(self.gc, 0, int(y_spacing * i), int(x_max), int(y_spacing * i))
finally:
self.gc.foreground = backup_fb
self.show_point(self.x_value, self.y_value)

63
2D_Slider/tags/0.1/src/slider_2d_test.py Normal file
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@ -0,0 +1,63 @@
"""
* 2d_slider_test.py
* 2D slider widget - test program
*
* (C) 2008 by Kristian Mueller <kristian-m@kristian-m.de>
* All Rights Reserved
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
import gtk
import slider_2d
def delete_event(widget, event, data=None):
print("closing")
gtk.main_quit()
def x_changed_callback(new_x_value):
value_x_label.set_text("Value X: %s" % new_x_value)
def y_changed_callback(new_y_value):
value_y_label.set_text("Value Y: %s" % new_y_value)
## main program ##
window = gtk.Window(gtk.WINDOW_TOPLEVEL)
window.set_title("2D Slider Test Program")
window.connect("delete_event", delete_event)
window.set_border_width(0)
window.set_default_size(450, 335)
value_x_label = gtk.Label("Value X: none")
value_y_label = gtk.Label("Value Y: none")
init_box = gtk.VBox()
init_box.set_border_width(35)
slider_2d = slider_2d.slider_2d(\
x_range = (0, 20), y_range = (0, 15))
slider_2d.connect('x_value_changed_event', x_changed_callback)
slider_2d.connect('y_value_changed_event', y_changed_callback)
init_box.pack_start(slider_2d, True, True, 0)
init_box.pack_start(value_x_label, False, False, 0)
init_box.pack_start(value_y_label, False, False, 0)
init_box.show_all()
window.add(init_box)
window.show_all()
gtk.main()