import pygtk import gobject import gtk from matplotlib.patches import Polygon,Rectangle from matplotlib.lines import Line2D import laydi import logger # global active mode. Used by toolbars to communicate correct mode active_mode = 'default' class ObjectTable: """A 2D table of elements. An ObjectTable is a resizable two-dimensional array of objects. When resized, it will keep all the elements that fit in the new shape, and forget about other elements. When new elements are needed to fill out the new shape, they will be created. """ def __init__(self, xsize=0, ysize=0, creator=None): """Creates a two-dimensional table of objects. @param xsize: Width of the object table. @param ysize: Height of the object table. @param creator: A function that will be used to instantiate new items. """ self._elements = [] self._creator = creator or (lambda : None) self.xsize = xsize self.ysize = ysize self.resize(xsize, ysize) def resize(self, xsize, ysize): """Resizes the table by removing and creating elements as required. Makes the ObjectTable the specified size by removing elements that will not fit in the new shape and appending elements to fill the table. New elements will be created with the creator function passed as an argument to __init__. @param xsize: The new width. @type xsize: int @param ysize: The new height. @type ysize: int """ # Delete or append new rows del self._elements[ysize:] new_rows = ysize - len(self._elements) self._elements.extend([list() for i in range(new_rows)]) # Delete or append new columns for row in self._elements: del row[xsize:] new_elems = xsize - len(row) row.extend([self._creator() for i in range(new_elems)]) self.xsize = xsize self.ysize = ysize def __getitem__(self, index): x, y = index return self._elements[y][x] def __setitem__(self, index, value): x, y = index self._elements[y][x] = value class ViewFrame (gtk.Frame): """ A ViewFrame is a gtk container widget that contains a View. The ViewFrame is either active or inactive, and belongs to a group of VeiwFrames of which only one can be active at any time. """ def __init__(self, view_frames): """Initializes a new ViewFrame. @param view_frames: A list of view frames to which the new view frame shouls belong. Only one ViewFrame in this list can be active at any time. """ gtk.Frame.__init__(self) self.focused = False self.view_frames = view_frames self.empty_view = EmptyView() self._button_event = None ## Set up a VBox with a label wrapped in an event box. label = gtk.Label() ebox = gtk.EventBox() ebox.add(label) vbox = gtk.VBox() vbox.pack_start(ebox, expand=False) vbox.pack_start(gtk.HSeparator(), expand=False) self._ebox_button_event = ebox.connect("button-press-event", self._on_button_press_event) ## Keep the references for later use. self._vbox = vbox self._ebox = ebox self._view_title = label self.add(vbox) view_frames.append(self) if len(view_frames) == 1: self.focus() else: self.focused = True self.unfocus() # Get dropped views self.drag_dest_set(gtk.DEST_DEFAULT_ALL, [("GTK_TREE_MODEL_ROW", gtk.TARGET_SAME_APP, 7)], gtk.gdk.ACTION_LINK) self.connect("drag-data-received", self.on_drag_data_received) # Set view self._view = self.empty_view self._view.connect("button-press-event", self._on_button_press_event) self._vbox.add(self._view) self._view_title.set_text(self._view.title) self.show_all() self._view.show() def focus(self): """Gets focus and ensures that no other ViewFrame in the same set is in focus. """ if self.focused: self.emit('focus-changed', self, True) return self for frame in self.view_frames: frame.unfocus() self.set_shadow_type(gtk.SHADOW_IN) self._ebox.set_state(gtk.STATE_ACTIVE) self.focused = True self.emit('focus-changed', self, True) return self def unfocus(self): """Removes focus from the ViewFrame. Does nothing if unfocused.""" if not self.focused: return self.set_shadow_type(gtk.SHADOW_OUT) self._ebox.set_state(gtk.STATE_NORMAL) self.focused = False self.emit('focus-changed', self, False) def set_view(self, view): """Set view to view or to empty view if parameter is None @param view: An instance of View """ # if None is passed, use empty view if view == None: view = self.empty_view # do nothing if the view is already there if view == self._view: return # detach view from current parent if view._view_frame: view._view_frame.set_view(None) # switch which widget we are listening to if self._button_event: self._view.disconnect(self._button_event) self._button_event = view.connect("button-press-event", self._on_button_press_event) # remove old view, set new view if self._view: self._view.hide() self._vbox.remove(self._view) self._view._view_frame = None self._view_title.set_text(view.title) self._vbox.add(view) view.show() view._view_frame = self self._view = view def get_view(self): """Returns current view, or None if the empty view is set. @returns: None if the ViewFrame is currently displaying it's EmptyView. Otherwise it returns the currently displeyd View. """ if self._view == self.empty_view: return None return self._view def _on_button_press_event(self, widget, event): if not self.focused: self.focus() def on_drag_data_received(self, widget, drag_context, x, y, selection, info, timestamp): treestore, path = selection.tree_get_row_drag_data() iter = treestore.get_iter(path) obj = treestore.get_value(iter, 2) if isinstance(obj, View): self.set_view(obj) self.focus() elif isinstance(obj, laydi.dataset.Dataset): view = self.get_view() if view != None and view.is_mappable_with(obj): view._update_color_from_dataset(obj) elif isinstance(obj, laydi.dataset.Selection): view = self.get_view() if view.is_mappable_with(obj): view.selection_changed(self.current_dim, obj) class MainView (gtk.Notebook): """The MainView class displays the Views in Laydi. MainView, of which there is normally only one instance, contains a gtk.Table that holds all the visible Views, and a single ViewFrame that is used for maximizing plots. """ def __init__(self): gtk.Notebook.__init__(self) self.set_show_tabs(False) self.set_show_border(False) self._focus_listeners = [] self._view_frames = [] self._views = ObjectTable(2, 2, lambda : ViewFrame(self._view_frames)) self._large_view = ViewFrame(list()) self.update_small_views() self.append_page(self._small_views) self.append_page(self._large_view) self.show() self.set_current_page(0) def __getitem__(self, x, y): return self._views[x, y] def update_small_views(self): """Creates a new gtk.Table to show the views. Called after changes to the _views property""" # Disconnect focus-changed signal for all ViewFrames for vf, fl in zip(self._view_frames, self._focus_listeners): vf.disconnect(fl) # Resize table self._small_views = gtk.Table(self._views.ysize, self._views.xsize, True) self._small_views.set_col_spacings(4) self._small_views.set_row_spacings(4) for x in range(self._views.xsize): for y in range(self._views.ysize): child = self._views[x,y] self._small_views.attach(child, x, x+1, y, y+1) self._small_views.show_all() # Create new focus-changed signal handlers fls = [] for vf in self._view_frames: fls.append(vf.connect('focus-changed', self._on_view_focus_changed)) self._focus_listeners = fls def get_active_small_view(self): """Returns the active ViewFrame in the small views table. If a view is maximized, the corresponding ViewFrame in the table will be returned, not the active maximized ViewFrame""" for vf in self._view_frames: if vf.focused: return vf return None def get_active_view_frame(self): """Returns the active view frame.""" if self.get_current_page() == 0: return self.get_active_small_view() else: return self._large_view def goto_large(self): """Maximize the view in the current ViewFrame. Maximizes the View in the current ViewFrame. The ViewFrame itself is not resized or modified, except it's view will be set to None. This method will do nothing if a view is currently maximized. """ if self.get_current_page() == 1: return vf = self.get_active_small_view() view = vf.get_view() vf.set_view(None) self._large_view.set_view(view) self.set_current_page(1) def goto_small(self): """Goes to the small views page. The maximized View will be given to the active ViewFrame in the view table. """ if self.get_current_page() == 0: return vf = self.get_active_small_view() view = self._large_view.get_view() self._large_view.set_view(None) vf.set_view(view) self.set_current_page(0) def insert_view(self, view): """Set a view in the currently active ViewFrame. @param view: An instance of View. """ if self.get_current_page() == 0: vf = self.get_active_small_view() else: vf = self._large_view vf.set_view(view) def remove_view(self, view): """Removes the given view if displayed.""" if view == None: return for vf in self._view_frames: if vf.get_view() == view: vf.set_view(None) def set_all_plots(self, views): """Displays all the views in the list, and hides all other views. Loops through all ViewFrames from top left to bottom right, and sets their currently active View to the next view in the list. After the last view is placed in a ViewFrame, the remaining ViewFrames are emptied. @param views: A list of views to set. """ for y in range(self._views.ysize): for x in range(self._views.xsize): if views: self._views[x, y].set_view(views.pop()) else: self._views[x, y].set_view(None) def get_active_view_index(self): current = self.get_active_small_view() for i in range(self._views.xsize): for j in range(self._views.ysize): if self._views[i, j] == current: return (i, j) return None def set_active_view_by_index(self, x, y): self._views[x, y].focus() def move_focus_left(self): x, y = self.get_active_view_index() if x > 0: self.set_active_view_by_index(x-1, y) def move_focus_right(self): x, y = self.get_active_view_index() if x < self._views.xsize-1: self.set_active_view_by_index(x+1, y) def move_focus_up(self): x, y = self.get_active_view_index() if y > 0: self.set_active_view_by_index(x, y-1) def move_focus_down(self): x, y = self.get_active_view_index() if y < self._views.ysize-1: self.set_active_view_by_index(x, y+1) def _on_view_focus_changed(self, widget, vf, focused): if focused: self.emit('view-changed', vf) def resize_table(self, width, height): """Resizes the list of small views. """ ## Hide all plots that will be removed from the screen. for x in range(self._views.xsize): for y in range(self._views.ysize): if x >= width or y >= height: self._views[x, y].set_view(None) self._view_frames.remove(self._views[x, y]) for x in range(self._views.xsize): for y in range(self._views.ysize): self._small_views.remove(self._views[x, y]) self._views.resize(width, height) self.update_small_views() self.insert_page(self._small_views, gtk.Label("small"), 0) self.remove_page(1) #self.set_current_page(0) self.goto_small() class View (gtk.Frame): """The base class of everything that is shown in the center view of laydi. Most views should rather subclass Plot, which automatically handles freezing, creates a toolbar, and sets up matplotlib Figure and Canvas objects. """ def __init__(self, title): gtk.Frame.__init__(self) self.title = title self.set_shadow_type(gtk.SHADOW_NONE) self._view_frame = None def get_toolbar(self): return None def is_mappable_with(self, dataset): """Override in individual plots.""" return False class EmptyView (View): """EmptyView is shown in ViewFrames that are unused.""" def __init__(self): View.__init__(self, 'Empty view') self.set_label(None) label = gtk.Label('No view') ebox = gtk.EventBox() ebox.add(label) self.add(ebox) label.show() ebox.show() self.show() class PlotMode: """A PlotMode object corresponds to a mouse mode in a plot. When a mode is selected in the toolbar, the PlotMode corresponding to the toolbar button is activated by calling setup(ax) for the axis system ax. """ def __init__(self, plot, name, tooltip, image_file): self.name = name self.tooltip = tooltip self.image_file = image_file self.plot = plot self.canvas = plot.canvas def get_icon(self): """Returns the icon for the PlotMode""" image = gtk.Image() image.set_from_pixbuf(laydi.icon_factory.get(self.image_file)) return image def activate(self): """Subclasses of PlotMode should do their initialization here. The activate method is called when a mode is activated, and is used primarily to set up callback functions on events in the canvas. """ pass def deactivate(self): """Subclasses of PlotMode should do their cleanup here. The deactivate method is primarily by subclasses of PlotMode to remove any callbacks they might have on the matplotlib canvas. """ pass class DefaultPlotMode(PlotMode): def __init__(self, plot): PlotMode.__init__(self, plot, 'default', 'Default mode', 'cursor') class PanPlotMode(PlotMode): def __init__(self, plot): PlotMode.__init__(self, plot, 'pan', 'Pan axes with left mouse, zoom with right', 'move') # Holds handler IDs for callbacks. self._button_press = None self._button_release = None self._motion_notify = None self._xypress = None self._button_pressed = None def activate(self): self._button_press = self.canvas.mpl_connect( 'button_press_event', self._on_button_press) self._button_release = self.canvas.mpl_connect( 'button_release_event', self._on_button_release) def deactivate(self): if self._button_press: self.canvas.mpl_disconnect(self._button_press) if self._button_release: self.canvas.mpl_disconnect(self._button_release) def _on_button_press(self, event): if event.button == 1: self._button_pressed = 1 elif event.button == 3: self._button_pressed = 3 else: self._button_pressed=None return x, y = event.x, event.y # push the current view to define home if stack is empty # if self._views.empty(): self.push_current() self._xypress=[] for i, a in enumerate(self.canvas.figure.get_axes()): if x is not None and y is not None and a.in_axes(event) \ and a.get_navigate(): xmin, xmax = a.get_xlim() ymin, ymax = a.get_ylim() lim = xmin, xmax, ymin, ymax self._xypress.append((x, y, a, i, lim,a.transData.frozen())) self.canvas.mpl_disconnect(self._motion_notify) cid = self.canvas.mpl_connect('motion_notify_event', self._on_motion_notify) self._motion_notify = cid def _on_motion_notify(self, event): """The drag callback in pan/zoom mode""" def format_deltas(event, dx, dy): """Returns the correct dx and dy based on the modifier keys""" if event.key=='control': if(abs(dx)>abs(dy)): dy = dx else: dx = dy elif event.key=='x': dy = 0 elif event.key=='y': dx = 0 elif event.key=='shift': if 2*abs(dx) < abs(dy): dx=0 elif 2*abs(dy) < abs(dx): dy=0 elif(abs(dx)>abs(dy)): dy=dy/abs(dy)*abs(dx) else: dx=dx/abs(dx)*abs(dy) return (dx,dy) for cur_xypress in self._xypress: lastx, lasty, a, ind, lim, trans = cur_xypress xmin, xmax, ymin, ymax = lim #safer to use the recorded button at the press than current button: #multiple button can get pressed during motion... if self._button_pressed==1: lastx, lasty = trans.inverted().transform( (lastx, lasty) ) x, y = trans.inverted().transform( (event.x, event.y) ) if a.get_xscale()=='log': dx=1-lastx/x else: dx=x-lastx if a.get_yscale()=='log': dy=1-lasty/y else: dy=y-lasty dx,dy=format_deltas(event,dx,dy) if a.get_xscale()=='log': xmin *= 1-dx xmax *= 1-dx else: xmin -= dx xmax -= dx if a.get_yscale()=='log': ymin *= 1-dy ymax *= 1-dy else: ymin -= dy ymax -= dy elif self._button_pressed==3: try: dx=(lastx-event.x)/float(a.bbox.width) dy=(lasty-event.y)/float(a.bbox.height) dx,dy=format_deltas(event,dx,dy) if a.get_aspect() != 'auto': dx = 0.5*(dx + dy) dy = dx alphax = pow(10.0,dx) alphay = pow(10.0,dy) lastx, lasty = trans.inverted().transform( (lastx, lasty) ) if a.get_xscale()=='log': xmin = lastx*(xmin/lastx)**alphax xmax = lastx*(xmax/lastx)**alphax else: xmin = lastx+alphax*(xmin-lastx) xmax = lastx+alphax*(xmax-lastx) if a.get_yscale()=='log': ymin = lasty*(ymin/lasty)**alphay ymax = lasty*(ymax/lasty)**alphay else: ymin = lasty+alphay*(ymin-lasty) ymax = lasty+alphay*(ymax-lasty) except OverflowError: warnings.warn('Overflow while panning') return a.set_xlim(xmin, xmax) a.set_ylim(ymin, ymax) self.canvas.draw() def _on_button_release(self, event): 'the release mouse button callback in pan/zoom mode' self.canvas.mpl_disconnect(self._motion_notify) if not self._xypress: return self._xypress = None self._button_pressed = None self.canvas.draw() self.plot.emit('pan-changed', self) class ZoomPlotMode(PlotMode): def __init__(self, plot): PlotMode.__init__(self, plot, 'zoom', 'Zoom to rectangle','zoom_to_rect') self._selectors = {} def activate(self): self.cids = [] for ax in self.canvas.figure.get_axes(): selector = Selector(ax, self._on_select, select_type='rectangle') selector.line.set_linestyle('-') selector.line.set_linewidth(0.5) self.cids.append(self.canvas.mpl_connect('button_release_event', selector._onrelease)) self.cids.append(self.canvas.mpl_connect('motion_notify_event', selector._onmove)) self.cids.append(self.canvas.mpl_connect('button_press_event', selector._onpress)) def deactivate(self): for cid in self.cids: self.canvas.mpl_disconnect(cid) def _on_select(self, x1, y1, x2, y2, key): if abs(x1-x2)<0.0001 or abs(y1-y2)<0.0001: # too sensitive zoom crashes matplotlib return ax = self.canvas.figure.get_axes()[0] ax.set_xlim((min(x1, x2), max(x1, x2))) ax.set_ylim((min(y1,y2), max(y1, y2))) self.canvas.draw() self.plot.emit('zoom-changed', self) class SelectLassoPlotMode(PlotMode): def __init__(self, plot): PlotMode.__init__(self, plot, 'lassoselect', 'Select within lasso', 'lasso') self._selectors = {} def activate(self): self.cids = [] for ax in self.canvas.figure.get_axes(): lasso = Selector(ax, self.plot.lasso_select_callback, select_type='lasso') self.lasso = lasso self.cids.append(self.canvas.mpl_connect('button_release_event', lasso._onrelease)) self.cids.append(self.canvas.mpl_connect('motion_notify_event', lasso._onmove)) self.cids.append(self.canvas.mpl_connect('button_press_event', lasso._onpress)) def deactivate(self): for cid in self.cids: self.canvas.mpl_disconnect(cid) self.lasso = None class SelectRectanglePlotMode(PlotMode): def __init__(self, plot): PlotMode.__init__(self, plot, 'select', 'Select within rectangle', 'select') self._selectors = {} def activate(self): self.cids = [] for ax in self.canvas.figure.get_axes(): lasso = Selector(ax, self.plot.rectangle_select_callback, select_type='rectangle') self.lasso = lasso self.cids.append(self.canvas.mpl_connect('button_release_event', lasso._onrelease)) self.cids.append(self.canvas.mpl_connect('motion_notify_event', lasso._onmove)) self.cids.append(self.canvas.mpl_connect('button_press_event', lasso._onpress)) def deactivate(self): for cid in self.cids: self.canvas.mpl_disconnect(cid) self.lasso = None class PlotToolbar(gtk.Toolbar): def __init__(self, plot): gtk.Toolbar.__init__(self) self.plot = plot self.canvas = plot.canvas self._current_mode = None self.tooltips = gtk.Tooltips() self._mode_sensitive = {} ## Maps toolbar buttons to PlotMode objects. self._mode_buttons = {} self.set_property('show-arrow', False) self.canvas.connect('enter-notify-event', self.on_enter_notify) self.show() self.add_mode(DefaultPlotMode(self.plot)) self.add_mode(PanPlotMode(self.plot)) self.add_mode(ZoomPlotMode(self.plot)) self.add_mode(SelectRectanglePlotMode(self.plot)) self.add_mode(SelectLassoPlotMode(self.plot)) self.insert(gtk.SeparatorToolItem(), -1) self.set_style(gtk.TOOLBAR_ICONS) # Set up freeze button btn = gtk.ToolButton(gtk.STOCK_SAVE) #btn.set_icon_widget(image) btn.connect('clicked', self._on_save_clicked) self.insert(btn, -1) self.save_button = btn # Set up freeze button btn = gtk.ToggleToolButton() image = gtk.Image() image.set_from_pixbuf(laydi.icon_factory.get('freeze')) btn.set_icon_widget(image) btn.connect('toggled', self._on_freeze_toggle) self.insert(btn, -1) self.freeze_button = btn self.show_all() def add_mode(self, mode): """Adds a new mode to the toolbar.""" self._mode_sensitive[mode] = True if len(self._mode_buttons) > 0: other = self._mode_buttons.keys()[0] else: other = None btn = gtk.RadioToolButton(other) btn.set_icon_widget(mode.get_icon()) btn.set_tooltip(self.tooltips, mode.tooltip, 'Private') btn.connect('toggled', self._on_mode_toggle) self._mode_buttons[btn] = mode self.insert(btn, -1) if self._current_mode == None: self._current_mode = mode def get_mode(self): """Returns the active mode name.""" if self._current_mode: return self._current_mode.name return None def get_mode_by_name(self, mode_name): """Returns the mode with the given name or None.""" for m in self._mode_buttons.values(): if m.name == mode_name: return m return None def get_button(self, mode_name): """Returns the button that corresponds to a mode name.""" for b, m in self._mode_buttons.items(): if m.name == mode_name: return b return None def set_mode(self, mode_name): """Sets a mode by name. Returns the mode or None""" if mode_name == self._current_mode.name: return None if self._current_mode: self._current_mode.deactivate() new_mode = self.get_mode_by_name(mode_name) if new_mode: new_mode.activate() self._current_mode = self.get_mode_by_name(mode_name) else: logger.log('warning', 'No such mode: %s' % mode_name) if self.get_button(mode_name) and \ not self.get_button(mode_name).get_active(): self.get_button(mode_name).set_active(True) globals()['active_mode'] = mode_name return self._current_mode def set_mode_sensitive(self, mode, bool): self._mode_sensitive[mode] = bool self.get_button(mode).set_sensitive(False) def _on_mode_toggle(self, button): mode = self._mode_buttons[button].name if self._mode_sensitive.get(mode) == False: logger.log('notice', 'Mode: %s is not sensitive in this plot' %mode) if button.get_active(): self.set_mode(self._mode_buttons[button].name) def _on_save_clicked(self, button): """Pops up a file dialog saver, and saves current plot""" dialog = gtk.FileChooserDialog('Save plot') dialog.set_action(gtk.FILE_CHOOSER_ACTION_SAVE) dialog.add_buttons(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL, gtk.STOCK_SAVE, gtk.RESPONSE_OK) default_name = "laydi_image" dialog.set_current_name("%s.png" % default_name) retval = dialog.run() if retval in [gtk.RESPONSE_CANCEL, gtk.RESPONSE_DELETE_EVENT]: logger.log("debug", "Cancelled save plot") elif retval == gtk.RESPONSE_OK: logger.log("debug", "Saving plot as: %s" % dialog.get_filename()) self.canvas.print_figure(dialog.get_filename()) else: print "unknown; ", retval dialog.destroy() def _on_freeze_toggle(self, button): self.plot.set_frozen(button.get_active()) def on_enter_notify(self, widget, event): self.set_mode(active_mode) # need views (plots) to grab key-events widget.grab_focus() class Selector: def __init__(self, ax, callback, select_type='lasso'): self.drawon = True self.eventson = True self.select_type = select_type self.eventpress = None self.eventrelease = None self._background = None self.callback = callback self.axes = ax self.figure = self.axes.figure self.canvas = self.figure.canvas self.verts = [] # to draw patch_props = dict(facecolor='gray', linewidth = 0, alpha=0.3, fill=True) line_props = dict(linestyle='--', lw=1.0, color='black') self.line = Line2D([0,0], [0,0], visible=False, **line_props) self.axes.add_line(self.line) if self.select_type == 'lasso': self.polygon = Polygon([(0, 0)], visible=False, **patch_props) elif self.select_type == 'rectangle': self.polygon = Rectangle((0,0), 0, 1, visible=False, **patch_props) self.axes.add_patch(self.polygon) def _onrelease(self, event): if self.eventpress is None or self._ignore(event): return self.eventrelease = event self._show_selector(False) if self.verts is not None: self.verts.append((event.xdata, event.ydata)) if self.select_type == 'lasso': if len(self.verts)>2: self.callback(self.verts, event.key) elif self.select_type == 'rectangle': x1, y1 = self.eventpress.xdata, self.eventpress.ydata x2, y2 = self.eventrelease.xdata, self.eventrelease.ydata self.callback(x1, y1, x2, y2, event.key) self.verts = [] self.eventpress = None self.eventrelease = None self._background = None return False def _onmove(self, event): if self.eventpress is None or self._ignore(event):return # add new data if self.select_type == 'lasso': self.verts.append((event.xdata, event.ydata)) self.polygon.xy = self.verts self.line.set_data(zip(*self.verts)) elif self.select_type == 'rectangle': x,y = event.xdata, event.ydata minx, maxx = self.eventpress.xdata, x miny, maxy = self.eventpress.ydata, y if minx>maxx: minx, maxx = maxx, minx if miny>maxy: miny, maxy = maxy, miny self.polygon.set_x(minx) self.polygon.set_y(miny) self.polygon.set_width(maxx-minx) self.polygon.set_height(maxy-miny) xx = [minx, maxx, maxx, minx, minx] yy = [miny, miny, maxy, maxy, miny] self.line.set_data(xx,yy) # draw self.canvas.restore_region(self._background) self.axes.draw_artist(self.line) self.axes.draw_artist(self.polygon) self.canvas.blit(self.axes.bbox) def _onpress(self, event): # Is the event to be ignored? if self._ignore(event): return self._show_selector(True) self.eventpress = event self.verts = [(event.xdata, event.ydata)] return False def _ignore(self, event): 'return True if event should be ignored' ignore = False # If no button was pressed yet ignore the event if it was out # of the axes if self.eventpress == None: return event.inaxes!= self.axes # If a button was pressed, check if the release-button is the # same. ignore = event.inaxes!=self.axes or\ event.button != self.eventpress.button if ignore: # remove poly + line if they are visible if self.polygon._visible or self.line._visible: self._show_selector(False) else: if not self.polygon._visible or not self.line._visible: # put poly + line back if we event is ok self._show_selector(True) return ignore def _show_selector(self, bool): if self.polygon and self.line: self.polygon.set_visible(bool) self.line.set_visible(bool) if self._background == None: self._background = self.canvas.copy_from_bbox(self.axes.bbox) self.canvas.restore_region(self._background) self.canvas.blit() # Create a view-changed signal that should be emitted every time # the active view changes. gobject.signal_new('view-changed', MainView, gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, (gobject.TYPE_PYOBJECT,)) # Create focus-changed signal gobject.signal_new('focus-changed', ViewFrame, gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, (gobject.TYPE_PYOBJECT, gobject.TYPE_BOOLEAN,))