4260c5a4a5
- New 'new-user-sketch' signal when a local path is closed - Trap BUTTON_RELEASE_EVENTs now
124 lines
3.5 KiB
Python
124 lines
3.5 KiB
Python
# Copyright (C) 2006, Red Hat, Inc.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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import gtk, gobject
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from Sketch import Sketch
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from SVGdraw import drawing
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from SVGdraw import svg
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class SketchPad(gtk.DrawingArea):
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__gsignals__ = {
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'new-user-sketch':(gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT]))
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}
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def __init__(self, bgcolor=(0.6, 1, 0.4)):
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gtk.DrawingArea.__init__(self)
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self._active_sketch = None
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self._rgb = (0.0, 0.0, 0.0)
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self._bgcolor = bgcolor
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self._sketches = []
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self.add_events(gtk.gdk.BUTTON_PRESS_MASK |
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gtk.gdk.BUTTON_RELEASE_MASK |
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gtk.gdk.BUTTON1_MOTION_MASK)
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self.connect("button-press-event", self._button_press_cb)
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self.connect("button-release-event", self._button_release_cb)
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self.connect("motion-notify-event", self._motion_notify_cb)
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self.connect('expose_event', self.expose)
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def clear(self):
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self._sketches = []
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self.window.invalidate_rect(None, False)
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def expose(self, widget, event):
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"""Draw the background of the sketchpad."""
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rect = self.get_allocation()
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ctx = widget.window.cairo_create()
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ctx.set_source_rgb(self._bgcolor[0], self._bgcolor[1], self._bgcolor[2])
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ctx.rectangle(0, 0, rect.width, rect.height)
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ctx.fill_preserve()
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ctx.set_source_rgb(0, 0.3, 0.2)
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ctx.stroke()
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for sketch in self._sketches:
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sketch.draw(ctx)
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return False
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def set_color(self, color):
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"""Sets the current drawing color of the sketchpad.
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color agument should be 3-item tuple of rgb values between 0 and 1."""
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self._rgb = color
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def add_sketch(self, sketch):
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"""Add a sketch to the the pad. Mostly for subclasses and clients."""
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self._sketches.append(sketch)
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self.window.invalidate_rect(None, False)
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def add_point(self, event):
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if not self._active_sketch:
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return
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self._active_sketch.add_point(event.x, event.y)
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self.window.invalidate_rect(None, False)
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def _button_press_cb(self, widget, event):
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self._active_sketch = Sketch(self._rgb)
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self._sketches.append(self._active_sketch)
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self.add_point(event)
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def _button_release_cb(self, widget, event):
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self.add_point(event)
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self.emit('new-user-sketch', self._active_sketch)
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self._active_sketch = None
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def _motion_notify_cb(self, widget, event):
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self.add_point(event)
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def to_svg(self):
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"""Return a string containing an SVG representation of this sketch."""
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d = drawing()
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s = svg()
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for sketch in self._sketches:
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s.addElement(sketch.draw_to_svg())
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d.setSVG(s)
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return d.toXml()
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def test_quit(w, skpad):
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print skpad.to_svg()
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gtk.main_quit()
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if __name__ == "__main__":
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window = gtk.Window()
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window.set_default_size(400, 300)
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window.connect("destroy", lambda w: gtk.main_quit())
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sketchpad = SketchPad()
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window.add(sketchpad)
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sketchpad.show()
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window.show()
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window.connect("destroy", test_quit, sketchpad)
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gtk.main()
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