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import gobject
import gtk
import gtk.gdk
import gtk.keysyms
import draw
class PyBootchartWidget(gtk.DrawingArea):
__gsignals__ = {
'expose-event': 'override',
'clicked' : (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, (gobject.TYPE_STRING, gtk.gdk.Event)),
'position-changed' : (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, (gobject.TYPE_INT, gobject.TYPE_INT)),
'set-scroll-adjustments' : (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, (gtk.Adjustment, gtk.Adjustment))
}
def __init__(self, res):
gtk.DrawingArea.__init__(self)
self.res = res
self.set_flags(gtk.CAN_FOCUS)
self.add_events(gtk.gdk.BUTTON_PRESS_MASK | gtk.gdk.BUTTON_RELEASE_MASK)
self.connect("button-press-event", self.on_area_button_press)
self.connect("button-release-event", self.on_area_button_release)
self.add_events(gtk.gdk.POINTER_MOTION_MASK | gtk.gdk.POINTER_MOTION_HINT_MASK | gtk.gdk.BUTTON_RELEASE_MASK)
self.connect("motion-notify-event", self.on_area_motion_notify)
self.connect("scroll-event", self.on_area_scroll_event)
self.connect('key-press-event', self.on_key_press_event)
self.connect('set-scroll-adjustments', self.on_set_scroll_adjustments)
self.connect("size-allocate", self.on_allocation_size_changed)
self.connect("position-changed", self.on_position_changed)
self.zoom_ratio = 1.0
self.x, self.y = 0.0, 0.0
self.chart_width, self.chart_height = draw.extents(*res)
self.hadj = None
self.vadj = None
def do_expose_event(self, event):
cr = self.window.cairo_create()
# set a clip region for the expose event
cr.rectangle(
event.area.x, event.area.y,
event.area.width, event.area.height
)
cr.clip()
self.draw(cr, self.get_allocation())
return False
def draw(self, cr, rect):
cr.set_source_rgba(1.0, 1.0, 1.0, 1.0)
cr.paint()
cr.scale(self.zoom_ratio, self.zoom_ratio)
cr.translate(-self.x, -self.y)
draw.render(cr, *self.res)
def position_changed(self):
self.emit("position-changed", self.x, self.y)
ZOOM_INCREMENT = 1.25
def zoom_image(self, zoom_ratio):
self.zoom_ratio = zoom_ratio
self._set_scroll_adjustments(self.hadj, self.vadj)
self.queue_draw()
def zoom_to_rect(self, rect):
zoom_ratio = float(rect.width)/float(self.chart_width)
self.zoom_image(zoom_ratio)
self.x = 0
self.position_changed()
def on_zoom_in(self, action):
self.zoom_image(self.zoom_ratio * self.ZOOM_INCREMENT)
def on_zoom_out(self, action):
self.zoom_image(self.zoom_ratio / self.ZOOM_INCREMENT)
def on_zoom_fit(self, action):
self.zoom_to_rect(self.get_allocation())
def on_zoom_100(self, action):
self.zoom_image(1.0)
POS_INCREMENT = 100
def on_key_press_event(self, widget, event):
if event.keyval == gtk.keysyms.Left:
self.x -= self.POS_INCREMENT/self.zoom_ratio
elif event.keyval == gtk.keysyms.Right:
self.x += self.POS_INCREMENT/self.zoom_ratio
elif event.keyval == gtk.keysyms.Up:
self.y -= self.POS_INCREMENT/self.zoom_ratio
elif event.keyval == gtk.keysyms.Down:
self.y += self.POS_INCREMENT/self.zoom_ratio
elif event.keyval == gtk.keysyms.Page_Up:
self.zoom_image(self.zoom_ratio * self.ZOOM_INCREMENT)
elif event.keyval == gtk.keysyms.Page_Down:
self.zoom_image(self.zoom_ratio / self.ZOOM_INCREMENT)
else:
return False
self.queue_draw()
self.position_changed()
return True
def on_area_button_press(self, area, event):
if event.button == 2 or event.button == 1:
area.window.set_cursor(gtk.gdk.Cursor(gtk.gdk.FLEUR))
self.prevmousex = event.x
self.prevmousey = event.y
if event.type not in (gtk.gdk.BUTTON_PRESS, gtk.gdk.BUTTON_RELEASE):
return False
return False
def on_area_button_release(self, area, event):
if event.button == 2 or event.button == 1:
area.window.set_cursor(gtk.gdk.Cursor(gtk.gdk.ARROW))
self.prevmousex = None
self.prevmousey = None
return True
return False
def on_area_scroll_event(self, area, event):
if event.direction == gtk.gdk.SCROLL_UP:
self.zoom_image(self.zoom_ratio * self.ZOOM_INCREMENT)
return True
if event.direction == gtk.gdk.SCROLL_DOWN:
self.zoom_image(self.zoom_ratio / self.ZOOM_INCREMENT)
return True
return False
def on_area_motion_notify(self, area, event):
state = event.state
if state & gtk.gdk.BUTTON2_MASK or state & gtk.gdk.BUTTON1_MASK:
x, y = int(event.x), int(event.y)
# pan the image
self.x += (self.prevmousex - x)/self.zoom_ratio
self.y += (self.prevmousey - y)/self.zoom_ratio
self.queue_draw()
self.prevmousex = x
self.prevmousey = y
self.position_changed()
return True
def on_set_scroll_adjustments(self, area, hadj, vadj):
self._set_scroll_adjustments(hadj, vadj)
def on_allocation_size_changed(self, widget, allocation):
self.hadj.page_size = allocation.width
self.hadj.page_increment = allocation.width * 0.9
self.vadj.page_size = allocation.height
self.vadj.page_increment = allocation.height * 0.9
def _set_scroll_adjustments(self, hadj, vadj):
if hadj == None:
hadj = gtk.Adjustment(0.0, 0.0, 0.0, 0.0, 0.0, 0.0)
if vadj == None:
vadj = gtk.Adjustment(0.0, 0.0, 0.0, 0.0, 0.0, 0.0)
if self.hadj != None and hadj != self.hadj:
self.hadj.disconnect(self.hadj_changed_signal_id)
if self.vadj != None and vadj != self.vadj:
self.vadj.disconnect(self.vadj_changed_signal_id)
if hadj != None:
self.hadj = hadj
self._set_adj_upper(self.hadj, self.zoom_ratio * self.chart_width)
self.hadj_changed_signal_id = self.hadj.connect('value-changed', self.on_adjustments_changed)
if vadj != None:
self.vadj = vadj
self._set_adj_upper(self.vadj, self.zoom_ratio * self.chart_height)
self.vadj_changed_signal_id = self.vadj.connect('value-changed', self.on_adjustments_changed)
def _set_adj_upper(self, adj, upper):
changed = False
value_changed = False
if adj.upper != upper:
adj.upper = upper
changed = True
max_value = max(0.0, upper - adj.page_size)
if adj.value > max_value:
adj.value = max_value
value_changed = True
if changed:
adj.changed()
if value_changed:
adj.value_changed()
def on_adjustments_changed(self, adj):
self.x = self.hadj.value / self.zoom_ratio
self.y = self.vadj.value / self.zoom_ratio
self.queue_draw()
def on_position_changed(self, widget, x, y):
self.hadj.value = x * self.zoom_ratio
self.vadj.value = y * self.zoom_ratio
PyBootchartWidget.set_set_scroll_adjustments_signal('set-scroll-adjustments')
class PyBootchartWindow(gtk.Window):
ui = '''
<ui>
<toolbar name="ToolBar">
<toolitem action="ZoomIn"/>
<toolitem action="ZoomOut"/>
<toolitem action="ZoomFit"/>
<toolitem action="Zoom100"/>
</toolbar>
</ui>
'''
def __init__(self, res):
gtk.Window.__init__(self)
window = self
window.set_title('Bootchart')
window.set_default_size(512, 512)
vbox = gtk.VBox()
window.add(vbox)
self.widget = PyBootchartWidget(res)
# Create a UIManager instance
uimanager = self.uimanager = gtk.UIManager()
# Add the accelerator group to the toplevel window
accelgroup = uimanager.get_accel_group()
window.add_accel_group(accelgroup)
# Create an ActionGroup
actiongroup = gtk.ActionGroup('Actions')
self.actiongroup = actiongroup
# Create actions
actiongroup.add_actions((
('ZoomIn', gtk.STOCK_ZOOM_IN, None, None, None, self.widget.on_zoom_in),
('ZoomOut', gtk.STOCK_ZOOM_OUT, None, None, None, self.widget.on_zoom_out),
('ZoomFit', gtk.STOCK_ZOOM_FIT, 'Fit Width', None, None, self.widget.on_zoom_fit),
('Zoom100', gtk.STOCK_ZOOM_100, None, None, None, self.widget.on_zoom_100),
))
# Add the actiongroup to the uimanager
uimanager.insert_action_group(actiongroup, 0)
# Add a UI description
uimanager.add_ui_from_string(self.ui)
# Scrolled window
scrolled = gtk.ScrolledWindow()
scrolled.add(self.widget)
# Create a Toolbar
toolbar = uimanager.get_widget('/ToolBar')
vbox.pack_start(toolbar, False)
vbox.pack_start(scrolled)
self.set_focus(self.widget)
self.show_all()
def show(res):
win = PyBootchartWindow(res)
win.connect('destroy', gtk.main_quit)
gtk.main()
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